danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 30 | #if V8_TARGET_ARCH_ARM |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 31 | |
| 32 | #include "bootstrapper.h" |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 33 | #include "code-stubs.h" |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 34 | #include "regexp-macro-assembler.h" |
mvstanton@chromium.org | 6bec009 | 2013-01-23 13:46:53 +0000 | [diff] [blame] | 35 | #include "stub-cache.h" |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 36 | |
| 37 | namespace v8 { |
| 38 | namespace internal { |
| 39 | |
| 40 | |
verwaest@chromium.org | 662436e | 2013-08-28 08:41:27 +0000 | [diff] [blame] | 41 | void FastNewClosureStub::InitializeInterfaceDescriptor( |
| 42 | Isolate* isolate, |
| 43 | CodeStubInterfaceDescriptor* descriptor) { |
| 44 | static Register registers[] = { r2 }; |
| 45 | descriptor->register_param_count_ = 1; |
| 46 | descriptor->register_params_ = registers; |
| 47 | descriptor->deoptimization_handler_ = |
| 48 | Runtime::FunctionForId(Runtime::kNewClosureFromStubFailure)->entry; |
| 49 | } |
| 50 | |
| 51 | |
yangguo@chromium.org | c73d55b | 2013-07-24 08:18:28 +0000 | [diff] [blame] | 52 | void ToNumberStub::InitializeInterfaceDescriptor( |
| 53 | Isolate* isolate, |
| 54 | CodeStubInterfaceDescriptor* descriptor) { |
| 55 | static Register registers[] = { r0 }; |
| 56 | descriptor->register_param_count_ = 1; |
| 57 | descriptor->register_params_ = registers; |
| 58 | descriptor->deoptimization_handler_ = NULL; |
| 59 | } |
| 60 | |
| 61 | |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 62 | void NumberToStringStub::InitializeInterfaceDescriptor( |
| 63 | Isolate* isolate, |
| 64 | CodeStubInterfaceDescriptor* descriptor) { |
| 65 | static Register registers[] = { r0 }; |
| 66 | descriptor->register_param_count_ = 1; |
| 67 | descriptor->register_params_ = registers; |
| 68 | descriptor->deoptimization_handler_ = NULL; |
| 69 | } |
| 70 | |
| 71 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 72 | void FastCloneShallowArrayStub::InitializeInterfaceDescriptor( |
| 73 | Isolate* isolate, |
| 74 | CodeStubInterfaceDescriptor* descriptor) { |
| 75 | static Register registers[] = { r3, r2, r1 }; |
| 76 | descriptor->register_param_count_ = 3; |
| 77 | descriptor->register_params_ = registers; |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 78 | descriptor->deoptimization_handler_ = |
| 79 | Runtime::FunctionForId(Runtime::kCreateArrayLiteralShallow)->entry; |
| 80 | } |
| 81 | |
| 82 | |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 83 | void FastCloneShallowObjectStub::InitializeInterfaceDescriptor( |
| 84 | Isolate* isolate, |
| 85 | CodeStubInterfaceDescriptor* descriptor) { |
| 86 | static Register registers[] = { r3, r2, r1, r0 }; |
| 87 | descriptor->register_param_count_ = 4; |
| 88 | descriptor->register_params_ = registers; |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 89 | descriptor->deoptimization_handler_ = |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 90 | Runtime::FunctionForId(Runtime::kCreateObjectLiteral)->entry; |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 94 | void CreateAllocationSiteStub::InitializeInterfaceDescriptor( |
| 95 | Isolate* isolate, |
| 96 | CodeStubInterfaceDescriptor* descriptor) { |
| 97 | static Register registers[] = { r2 }; |
| 98 | descriptor->register_param_count_ = 1; |
| 99 | descriptor->register_params_ = registers; |
| 100 | descriptor->deoptimization_handler_ = NULL; |
| 101 | } |
| 102 | |
| 103 | |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 104 | void KeyedLoadFastElementStub::InitializeInterfaceDescriptor( |
| 105 | Isolate* isolate, |
| 106 | CodeStubInterfaceDescriptor* descriptor) { |
| 107 | static Register registers[] = { r1, r0 }; |
| 108 | descriptor->register_param_count_ = 2; |
| 109 | descriptor->register_params_ = registers; |
| 110 | descriptor->deoptimization_handler_ = |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 111 | FUNCTION_ADDR(KeyedLoadIC_MissFromStubFailure); |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 115 | void LoadFieldStub::InitializeInterfaceDescriptor( |
| 116 | Isolate* isolate, |
| 117 | CodeStubInterfaceDescriptor* descriptor) { |
| 118 | static Register registers[] = { r0 }; |
| 119 | descriptor->register_param_count_ = 1; |
| 120 | descriptor->register_params_ = registers; |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 121 | descriptor->deoptimization_handler_ = NULL; |
| 122 | } |
| 123 | |
| 124 | |
| 125 | void KeyedLoadFieldStub::InitializeInterfaceDescriptor( |
| 126 | Isolate* isolate, |
| 127 | CodeStubInterfaceDescriptor* descriptor) { |
| 128 | static Register registers[] = { r1 }; |
| 129 | descriptor->register_param_count_ = 1; |
| 130 | descriptor->register_params_ = registers; |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 131 | descriptor->deoptimization_handler_ = NULL; |
| 132 | } |
| 133 | |
| 134 | |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 135 | void KeyedStoreFastElementStub::InitializeInterfaceDescriptor( |
| 136 | Isolate* isolate, |
| 137 | CodeStubInterfaceDescriptor* descriptor) { |
| 138 | static Register registers[] = { r2, r1, r0 }; |
| 139 | descriptor->register_param_count_ = 3; |
| 140 | descriptor->register_params_ = registers; |
| 141 | descriptor->deoptimization_handler_ = |
| 142 | FUNCTION_ADDR(KeyedStoreIC_MissFromStubFailure); |
| 143 | } |
| 144 | |
| 145 | |
danno@chromium.org | 94b0d6f | 2013-02-04 13:33:20 +0000 | [diff] [blame] | 146 | void TransitionElementsKindStub::InitializeInterfaceDescriptor( |
| 147 | Isolate* isolate, |
| 148 | CodeStubInterfaceDescriptor* descriptor) { |
| 149 | static Register registers[] = { r0, r1 }; |
| 150 | descriptor->register_param_count_ = 2; |
| 151 | descriptor->register_params_ = registers; |
| 152 | Address entry = |
| 153 | Runtime::FunctionForId(Runtime::kTransitionElementsKind)->entry; |
| 154 | descriptor->deoptimization_handler_ = FUNCTION_ADDR(entry); |
| 155 | } |
| 156 | |
| 157 | |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 158 | void CompareNilICStub::InitializeInterfaceDescriptor( |
| 159 | Isolate* isolate, |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 160 | CodeStubInterfaceDescriptor* descriptor) { |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 161 | static Register registers[] = { r0 }; |
| 162 | descriptor->register_param_count_ = 1; |
| 163 | descriptor->register_params_ = registers; |
| 164 | descriptor->deoptimization_handler_ = |
| 165 | FUNCTION_ADDR(CompareNilIC_Miss); |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 166 | descriptor->SetMissHandler( |
| 167 | ExternalReference(IC_Utility(IC::kCompareNilIC_Miss), isolate)); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | |
jkummerow@chromium.org | 25b0e21 | 2013-10-04 15:38:52 +0000 | [diff] [blame] | 171 | void BinaryOpStub::InitializeInterfaceDescriptor( |
| 172 | Isolate* isolate, |
| 173 | CodeStubInterfaceDescriptor* descriptor) { |
| 174 | static Register registers[] = { r1, r0 }; |
| 175 | descriptor->register_param_count_ = 2; |
| 176 | descriptor->register_params_ = registers; |
| 177 | descriptor->deoptimization_handler_ = FUNCTION_ADDR(BinaryOpIC_Miss); |
| 178 | descriptor->SetMissHandler( |
| 179 | ExternalReference(IC_Utility(IC::kBinaryOpIC_Miss), isolate)); |
| 180 | } |
| 181 | |
| 182 | |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 183 | static void InitializeArrayConstructorDescriptor( |
| 184 | Isolate* isolate, |
| 185 | CodeStubInterfaceDescriptor* descriptor, |
| 186 | int constant_stack_parameter_count) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 187 | // register state |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 188 | // r0 -- number of arguments |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 189 | // r1 -- function |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 190 | // r2 -- type info cell with elements kind |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 191 | static Register registers[] = { r1, r2 }; |
| 192 | descriptor->register_param_count_ = 2; |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 193 | if (constant_stack_parameter_count != 0) { |
| 194 | // stack param count needs (constructor pointer, and single argument) |
| 195 | descriptor->stack_parameter_count_ = &r0; |
| 196 | } |
| 197 | descriptor->hint_stack_parameter_count_ = constant_stack_parameter_count; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 198 | descriptor->register_params_ = registers; |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 199 | descriptor->function_mode_ = JS_FUNCTION_STUB_MODE; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 200 | descriptor->deoptimization_handler_ = |
ulan@chromium.org | dfe5307 | 2013-06-06 14:14:51 +0000 | [diff] [blame] | 201 | Runtime::FunctionForId(Runtime::kArrayConstructor)->entry; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 205 | static void InitializeInternalArrayConstructorDescriptor( |
| 206 | Isolate* isolate, |
| 207 | CodeStubInterfaceDescriptor* descriptor, |
| 208 | int constant_stack_parameter_count) { |
| 209 | // register state |
| 210 | // r0 -- number of arguments |
| 211 | // r1 -- constructor function |
| 212 | static Register registers[] = { r1 }; |
| 213 | descriptor->register_param_count_ = 1; |
| 214 | |
| 215 | if (constant_stack_parameter_count != 0) { |
| 216 | // stack param count needs (constructor pointer, and single argument) |
| 217 | descriptor->stack_parameter_count_ = &r0; |
| 218 | } |
| 219 | descriptor->hint_stack_parameter_count_ = constant_stack_parameter_count; |
| 220 | descriptor->register_params_ = registers; |
| 221 | descriptor->function_mode_ = JS_FUNCTION_STUB_MODE; |
| 222 | descriptor->deoptimization_handler_ = |
ulan@chromium.org | dfe5307 | 2013-06-06 14:14:51 +0000 | [diff] [blame] | 223 | Runtime::FunctionForId(Runtime::kInternalArrayConstructor)->entry; |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 227 | void ArrayNoArgumentConstructorStub::InitializeInterfaceDescriptor( |
| 228 | Isolate* isolate, |
| 229 | CodeStubInterfaceDescriptor* descriptor) { |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 230 | InitializeArrayConstructorDescriptor(isolate, descriptor, 0); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | |
| 234 | void ArraySingleArgumentConstructorStub::InitializeInterfaceDescriptor( |
| 235 | Isolate* isolate, |
| 236 | CodeStubInterfaceDescriptor* descriptor) { |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 237 | InitializeArrayConstructorDescriptor(isolate, descriptor, 1); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | |
| 241 | void ArrayNArgumentsConstructorStub::InitializeInterfaceDescriptor( |
| 242 | Isolate* isolate, |
| 243 | CodeStubInterfaceDescriptor* descriptor) { |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 244 | InitializeArrayConstructorDescriptor(isolate, descriptor, -1); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | |
rossberg@chromium.org | b99c754 | 2013-05-31 11:40:45 +0000 | [diff] [blame] | 248 | void ToBooleanStub::InitializeInterfaceDescriptor( |
| 249 | Isolate* isolate, |
| 250 | CodeStubInterfaceDescriptor* descriptor) { |
| 251 | static Register registers[] = { r0 }; |
| 252 | descriptor->register_param_count_ = 1; |
| 253 | descriptor->register_params_ = registers; |
| 254 | descriptor->deoptimization_handler_ = |
| 255 | FUNCTION_ADDR(ToBooleanIC_Miss); |
| 256 | descriptor->SetMissHandler( |
| 257 | ExternalReference(IC_Utility(IC::kToBooleanIC_Miss), isolate)); |
| 258 | } |
| 259 | |
| 260 | |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 261 | void InternalArrayNoArgumentConstructorStub::InitializeInterfaceDescriptor( |
| 262 | Isolate* isolate, |
| 263 | CodeStubInterfaceDescriptor* descriptor) { |
| 264 | InitializeInternalArrayConstructorDescriptor(isolate, descriptor, 0); |
| 265 | } |
| 266 | |
| 267 | |
| 268 | void InternalArraySingleArgumentConstructorStub::InitializeInterfaceDescriptor( |
| 269 | Isolate* isolate, |
| 270 | CodeStubInterfaceDescriptor* descriptor) { |
| 271 | InitializeInternalArrayConstructorDescriptor(isolate, descriptor, 1); |
| 272 | } |
| 273 | |
| 274 | |
| 275 | void InternalArrayNArgumentsConstructorStub::InitializeInterfaceDescriptor( |
| 276 | Isolate* isolate, |
| 277 | CodeStubInterfaceDescriptor* descriptor) { |
| 278 | InitializeInternalArrayConstructorDescriptor(isolate, descriptor, -1); |
| 279 | } |
| 280 | |
| 281 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 282 | void StoreGlobalStub::InitializeInterfaceDescriptor( |
| 283 | Isolate* isolate, |
| 284 | CodeStubInterfaceDescriptor* descriptor) { |
| 285 | static Register registers[] = { r1, r2, r0 }; |
| 286 | descriptor->register_param_count_ = 3; |
| 287 | descriptor->register_params_ = registers; |
| 288 | descriptor->deoptimization_handler_ = |
| 289 | FUNCTION_ADDR(StoreIC_MissFromStubFailure); |
| 290 | } |
| 291 | |
| 292 | |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 293 | void ElementsTransitionAndStoreStub::InitializeInterfaceDescriptor( |
| 294 | Isolate* isolate, |
| 295 | CodeStubInterfaceDescriptor* descriptor) { |
| 296 | static Register registers[] = { r0, r3, r1, r2 }; |
| 297 | descriptor->register_param_count_ = 4; |
| 298 | descriptor->register_params_ = registers; |
| 299 | descriptor->deoptimization_handler_ = |
| 300 | FUNCTION_ADDR(ElementsTransitionAndStoreIC_Miss); |
| 301 | } |
| 302 | |
| 303 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 304 | #define __ ACCESS_MASM(masm) |
| 305 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 306 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 307 | static void EmitIdenticalObjectComparison(MacroAssembler* masm, |
| 308 | Label* slow, |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 309 | Condition cond); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 310 | static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
| 311 | Register lhs, |
| 312 | Register rhs, |
| 313 | Label* lhs_not_nan, |
| 314 | Label* slow, |
| 315 | bool strict); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 316 | static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, |
| 317 | Register lhs, |
| 318 | Register rhs); |
| 319 | |
| 320 | |
ulan@chromium.org | 77ca49a | 2013-04-22 09:43:56 +0000 | [diff] [blame] | 321 | void HydrogenCodeStub::GenerateLightweightMiss(MacroAssembler* masm) { |
| 322 | // Update the static counter each time a new code stub is generated. |
| 323 | Isolate* isolate = masm->isolate(); |
| 324 | isolate->counters()->code_stubs()->Increment(); |
| 325 | |
| 326 | CodeStubInterfaceDescriptor* descriptor = GetInterfaceDescriptor(isolate); |
| 327 | int param_count = descriptor->register_param_count_; |
| 328 | { |
| 329 | // Call the runtime system in a fresh internal frame. |
| 330 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 331 | ASSERT(descriptor->register_param_count_ == 0 || |
| 332 | r0.is(descriptor->register_params_[param_count - 1])); |
| 333 | // Push arguments |
| 334 | for (int i = 0; i < param_count; ++i) { |
| 335 | __ push(descriptor->register_params_[i]); |
| 336 | } |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 337 | ExternalReference miss = descriptor->miss_handler(); |
ulan@chromium.org | 77ca49a | 2013-04-22 09:43:56 +0000 | [diff] [blame] | 338 | __ CallExternalReference(miss, descriptor->register_param_count_); |
| 339 | } |
| 340 | |
| 341 | __ Ret(); |
| 342 | } |
| 343 | |
| 344 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 345 | void FastNewContextStub::Generate(MacroAssembler* masm) { |
| 346 | // Try to allocate the context in new space. |
| 347 | Label gc; |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 348 | int length = slots_ + Context::MIN_CONTEXT_SLOTS; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 349 | |
| 350 | // Attempt to allocate the context in new space. |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 351 | __ Allocate(FixedArray::SizeFor(length), r0, r1, r2, &gc, TAG_OBJECT); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 352 | |
| 353 | // Load the function from the stack. |
| 354 | __ ldr(r3, MemOperand(sp, 0)); |
| 355 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 356 | // Set up the object header. |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 357 | __ LoadRoot(r1, Heap::kFunctionContextMapRootIndex); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 358 | __ mov(r2, Operand(Smi::FromInt(length))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 359 | __ str(r2, FieldMemOperand(r0, FixedArray::kLengthOffset)); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 360 | __ str(r1, FieldMemOperand(r0, HeapObject::kMapOffset)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 361 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 362 | // Set up the fixed slots, copy the global object from the previous context. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 363 | __ ldr(r2, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 364 | __ mov(r1, Operand(Smi::FromInt(0))); |
| 365 | __ str(r3, MemOperand(r0, Context::SlotOffset(Context::CLOSURE_INDEX))); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 366 | __ str(cp, MemOperand(r0, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 367 | __ str(r1, MemOperand(r0, Context::SlotOffset(Context::EXTENSION_INDEX))); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 368 | __ str(r2, MemOperand(r0, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 369 | |
| 370 | // Initialize the rest of the slots to undefined. |
| 371 | __ LoadRoot(r1, Heap::kUndefinedValueRootIndex); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 372 | for (int i = Context::MIN_CONTEXT_SLOTS; i < length; i++) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 373 | __ str(r1, MemOperand(r0, Context::SlotOffset(i))); |
| 374 | } |
| 375 | |
| 376 | // Remove the on-stack argument and return. |
| 377 | __ mov(cp, r0); |
| 378 | __ pop(); |
| 379 | __ Ret(); |
| 380 | |
| 381 | // Need to collect. Call into runtime system. |
| 382 | __ bind(&gc); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 383 | __ TailCallRuntime(Runtime::kNewFunctionContext, 1, 1); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 384 | } |
| 385 | |
| 386 | |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 387 | void FastNewBlockContextStub::Generate(MacroAssembler* masm) { |
| 388 | // Stack layout on entry: |
| 389 | // |
| 390 | // [sp]: function. |
| 391 | // [sp + kPointerSize]: serialized scope info |
| 392 | |
| 393 | // Try to allocate the context in new space. |
| 394 | Label gc; |
| 395 | int length = slots_ + Context::MIN_CONTEXT_SLOTS; |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 396 | __ Allocate(FixedArray::SizeFor(length), r0, r1, r2, &gc, TAG_OBJECT); |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 397 | |
| 398 | // Load the function from the stack. |
| 399 | __ ldr(r3, MemOperand(sp, 0)); |
| 400 | |
| 401 | // Load the serialized scope info from the stack. |
| 402 | __ ldr(r1, MemOperand(sp, 1 * kPointerSize)); |
| 403 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 404 | // Set up the object header. |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 405 | __ LoadRoot(r2, Heap::kBlockContextMapRootIndex); |
| 406 | __ str(r2, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 407 | __ mov(r2, Operand(Smi::FromInt(length))); |
| 408 | __ str(r2, FieldMemOperand(r0, FixedArray::kLengthOffset)); |
| 409 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 410 | // If this block context is nested in the native context we get a smi |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 411 | // sentinel instead of a function. The block context should get the |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 412 | // canonical empty function of the native context as its closure which |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 413 | // we still have to look up. |
| 414 | Label after_sentinel; |
| 415 | __ JumpIfNotSmi(r3, &after_sentinel); |
| 416 | if (FLAG_debug_code) { |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 417 | __ cmp(r3, Operand::Zero()); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 418 | __ Assert(eq, kExpected0AsASmiSentinel); |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 419 | } |
| 420 | __ ldr(r3, GlobalObjectOperand()); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 421 | __ ldr(r3, FieldMemOperand(r3, GlobalObject::kNativeContextOffset)); |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 422 | __ ldr(r3, ContextOperand(r3, Context::CLOSURE_INDEX)); |
| 423 | __ bind(&after_sentinel); |
| 424 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 425 | // Set up the fixed slots, copy the global object from the previous context. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 426 | __ ldr(r2, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX)); |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 427 | __ str(r3, ContextOperand(r0, Context::CLOSURE_INDEX)); |
| 428 | __ str(cp, ContextOperand(r0, Context::PREVIOUS_INDEX)); |
| 429 | __ str(r1, ContextOperand(r0, Context::EXTENSION_INDEX)); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 430 | __ str(r2, ContextOperand(r0, Context::GLOBAL_OBJECT_INDEX)); |
svenpanne@chromium.org | a8bb4d9 | 2011-10-10 13:20:40 +0000 | [diff] [blame] | 431 | |
| 432 | // Initialize the rest of the slots to the hole value. |
| 433 | __ LoadRoot(r1, Heap::kTheHoleValueRootIndex); |
| 434 | for (int i = 0; i < slots_; i++) { |
| 435 | __ str(r1, ContextOperand(r0, i + Context::MIN_CONTEXT_SLOTS)); |
| 436 | } |
| 437 | |
| 438 | // Remove the on-stack argument and return. |
| 439 | __ mov(cp, r0); |
| 440 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 441 | __ Ret(); |
| 442 | |
| 443 | // Need to collect. Call into runtime system. |
| 444 | __ bind(&gc); |
| 445 | __ TailCallRuntime(Runtime::kPushBlockContext, 2, 1); |
| 446 | } |
| 447 | |
| 448 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 449 | // Takes a Smi and converts to an IEEE 64 bit floating point value in two |
| 450 | // registers. The format is 1 sign bit, 11 exponent bits (biased 1023) and |
| 451 | // 52 fraction bits (20 in the first word, 32 in the second). Zeros is a |
| 452 | // scratch register. Destroys the source register. No GC occurs during this |
| 453 | // stub so you don't have to set up the frame. |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 454 | class ConvertToDoubleStub : public PlatformCodeStub { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 455 | public: |
| 456 | ConvertToDoubleStub(Register result_reg_1, |
| 457 | Register result_reg_2, |
| 458 | Register source_reg, |
| 459 | Register scratch_reg) |
| 460 | : result1_(result_reg_1), |
| 461 | result2_(result_reg_2), |
| 462 | source_(source_reg), |
| 463 | zeros_(scratch_reg) { } |
| 464 | |
| 465 | private: |
| 466 | Register result1_; |
| 467 | Register result2_; |
| 468 | Register source_; |
| 469 | Register zeros_; |
| 470 | |
| 471 | // Minor key encoding in 16 bits. |
| 472 | class ModeBits: public BitField<OverwriteMode, 0, 2> {}; |
| 473 | class OpBits: public BitField<Token::Value, 2, 14> {}; |
| 474 | |
| 475 | Major MajorKey() { return ConvertToDouble; } |
| 476 | int MinorKey() { |
| 477 | // Encode the parameters in a unique 16 bit value. |
| 478 | return result1_.code() + |
| 479 | (result2_.code() << 4) + |
| 480 | (source_.code() << 8) + |
| 481 | (zeros_.code() << 12); |
| 482 | } |
| 483 | |
| 484 | void Generate(MacroAssembler* masm); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 485 | }; |
| 486 | |
| 487 | |
| 488 | void ConvertToDoubleStub::Generate(MacroAssembler* masm) { |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 489 | Register exponent = result1_; |
| 490 | Register mantissa = result2_; |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 491 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 492 | Label not_special; |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 493 | __ SmiUntag(source_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 494 | // Move sign bit from source to destination. This works because the sign bit |
| 495 | // in the exponent word of the double has the same position and polarity as |
| 496 | // the 2's complement sign bit in a Smi. |
| 497 | STATIC_ASSERT(HeapNumber::kSignMask == 0x80000000u); |
| 498 | __ and_(exponent, source_, Operand(HeapNumber::kSignMask), SetCC); |
| 499 | // Subtract from 0 if source was negative. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 500 | __ rsb(source_, source_, Operand::Zero(), LeaveCC, ne); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 501 | |
| 502 | // We have -1, 0 or 1, which we treat specially. Register source_ contains |
| 503 | // absolute value: it is either equal to 1 (special case of -1 and 1), |
| 504 | // greater than 1 (not a special case) or less than 1 (special case of 0). |
| 505 | __ cmp(source_, Operand(1)); |
| 506 | __ b(gt, ¬_special); |
| 507 | |
| 508 | // For 1 or -1 we need to or in the 0 exponent (biased to 1023). |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 509 | const uint32_t exponent_word_for_1 = |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 510 | HeapNumber::kExponentBias << HeapNumber::kExponentShift; |
| 511 | __ orr(exponent, exponent, Operand(exponent_word_for_1), LeaveCC, eq); |
| 512 | // 1, 0 and -1 all have 0 for the second word. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 513 | __ mov(mantissa, Operand::Zero()); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 514 | __ Ret(); |
| 515 | |
| 516 | __ bind(¬_special); |
mstarzinger@chromium.org | b228be0 | 2013-04-18 14:56:59 +0000 | [diff] [blame] | 517 | __ clz(zeros_, source_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 518 | // Compute exponent and or it into the exponent register. |
| 519 | // We use mantissa as a scratch register here. Use a fudge factor to |
| 520 | // divide the constant 31 + HeapNumber::kExponentBias, 0x41d, into two parts |
| 521 | // that fit in the ARM's constant field. |
| 522 | int fudge = 0x400; |
| 523 | __ rsb(mantissa, zeros_, Operand(31 + HeapNumber::kExponentBias - fudge)); |
| 524 | __ add(mantissa, mantissa, Operand(fudge)); |
| 525 | __ orr(exponent, |
| 526 | exponent, |
| 527 | Operand(mantissa, LSL, HeapNumber::kExponentShift)); |
| 528 | // Shift up the source chopping the top bit off. |
| 529 | __ add(zeros_, zeros_, Operand(1)); |
| 530 | // This wouldn't work for 1.0 or -1.0 as the shift would be 32 which means 0. |
| 531 | __ mov(source_, Operand(source_, LSL, zeros_)); |
| 532 | // Compute lower part of fraction (last 12 bits). |
| 533 | __ mov(mantissa, Operand(source_, LSL, HeapNumber::kMantissaBitsInTopWord)); |
| 534 | // And the top (top 20 bits). |
| 535 | __ orr(exponent, |
| 536 | exponent, |
| 537 | Operand(source_, LSR, 32 - HeapNumber::kMantissaBitsInTopWord)); |
| 538 | __ Ret(); |
| 539 | } |
| 540 | |
| 541 | |
jkummerow@chromium.org | 1e8da74 | 2013-08-26 17:13:35 +0000 | [diff] [blame] | 542 | void DoubleToIStub::Generate(MacroAssembler* masm) { |
| 543 | Label out_of_range, only_low, negate, done; |
| 544 | Register input_reg = source(); |
| 545 | Register result_reg = destination(); |
| 546 | |
| 547 | int double_offset = offset(); |
| 548 | // Account for saved regs if input is sp. |
| 549 | if (input_reg.is(sp)) double_offset += 2 * kPointerSize; |
| 550 | |
| 551 | // Immediate values for this stub fit in instructions, so it's safe to use ip. |
| 552 | Register scratch = ip; |
| 553 | Register scratch_low = |
| 554 | GetRegisterThatIsNotOneOf(input_reg, result_reg, scratch); |
| 555 | Register scratch_high = |
| 556 | GetRegisterThatIsNotOneOf(input_reg, result_reg, scratch, scratch_low); |
| 557 | LowDwVfpRegister double_scratch = kScratchDoubleReg; |
| 558 | |
| 559 | __ Push(scratch_high, scratch_low); |
| 560 | |
| 561 | if (!skip_fastpath()) { |
| 562 | // Load double input. |
| 563 | __ vldr(double_scratch, MemOperand(input_reg, double_offset)); |
| 564 | __ vmov(scratch_low, scratch_high, double_scratch); |
| 565 | |
| 566 | // Do fast-path convert from double to int. |
| 567 | __ vcvt_s32_f64(double_scratch.low(), double_scratch); |
| 568 | __ vmov(result_reg, double_scratch.low()); |
| 569 | |
| 570 | // If result is not saturated (0x7fffffff or 0x80000000), we are done. |
| 571 | __ sub(scratch, result_reg, Operand(1)); |
| 572 | __ cmp(scratch, Operand(0x7ffffffe)); |
| 573 | __ b(lt, &done); |
| 574 | } else { |
| 575 | // We've already done MacroAssembler::TryFastTruncatedDoubleToILoad, so we |
| 576 | // know exponent > 31, so we can skip the vcvt_s32_f64 which will saturate. |
| 577 | if (double_offset == 0) { |
| 578 | __ ldm(ia, input_reg, scratch_low.bit() | scratch_high.bit()); |
| 579 | } else { |
| 580 | __ ldr(scratch_low, MemOperand(input_reg, double_offset)); |
| 581 | __ ldr(scratch_high, MemOperand(input_reg, double_offset + kIntSize)); |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | __ Ubfx(scratch, scratch_high, |
| 586 | HeapNumber::kExponentShift, HeapNumber::kExponentBits); |
| 587 | // Load scratch with exponent - 1. This is faster than loading |
| 588 | // with exponent because Bias + 1 = 1024 which is an *ARM* immediate value. |
| 589 | STATIC_ASSERT(HeapNumber::kExponentBias + 1 == 1024); |
| 590 | __ sub(scratch, scratch, Operand(HeapNumber::kExponentBias + 1)); |
| 591 | // If exponent is greater than or equal to 84, the 32 less significant |
| 592 | // bits are 0s (2^84 = 1, 52 significant bits, 32 uncoded bits), |
| 593 | // the result is 0. |
| 594 | // Compare exponent with 84 (compare exponent - 1 with 83). |
| 595 | __ cmp(scratch, Operand(83)); |
| 596 | __ b(ge, &out_of_range); |
| 597 | |
| 598 | // If we reach this code, 31 <= exponent <= 83. |
| 599 | // So, we don't have to handle cases where 0 <= exponent <= 20 for |
| 600 | // which we would need to shift right the high part of the mantissa. |
| 601 | // Scratch contains exponent - 1. |
| 602 | // Load scratch with 52 - exponent (load with 51 - (exponent - 1)). |
| 603 | __ rsb(scratch, scratch, Operand(51), SetCC); |
| 604 | __ b(ls, &only_low); |
| 605 | // 21 <= exponent <= 51, shift scratch_low and scratch_high |
| 606 | // to generate the result. |
| 607 | __ mov(scratch_low, Operand(scratch_low, LSR, scratch)); |
| 608 | // Scratch contains: 52 - exponent. |
| 609 | // We needs: exponent - 20. |
| 610 | // So we use: 32 - scratch = 32 - 52 + exponent = exponent - 20. |
| 611 | __ rsb(scratch, scratch, Operand(32)); |
| 612 | __ Ubfx(result_reg, scratch_high, |
| 613 | 0, HeapNumber::kMantissaBitsInTopWord); |
| 614 | // Set the implicit 1 before the mantissa part in scratch_high. |
| 615 | __ orr(result_reg, result_reg, |
| 616 | Operand(1 << HeapNumber::kMantissaBitsInTopWord)); |
| 617 | __ orr(result_reg, scratch_low, Operand(result_reg, LSL, scratch)); |
| 618 | __ b(&negate); |
| 619 | |
| 620 | __ bind(&out_of_range); |
| 621 | __ mov(result_reg, Operand::Zero()); |
| 622 | __ b(&done); |
| 623 | |
| 624 | __ bind(&only_low); |
| 625 | // 52 <= exponent <= 83, shift only scratch_low. |
| 626 | // On entry, scratch contains: 52 - exponent. |
| 627 | __ rsb(scratch, scratch, Operand::Zero()); |
| 628 | __ mov(result_reg, Operand(scratch_low, LSL, scratch)); |
| 629 | |
| 630 | __ bind(&negate); |
| 631 | // If input was positive, scratch_high ASR 31 equals 0 and |
| 632 | // scratch_high LSR 31 equals zero. |
| 633 | // New result = (result eor 0) + 0 = result. |
| 634 | // If the input was negative, we have to negate the result. |
| 635 | // Input_high ASR 31 equals 0xffffffff and scratch_high LSR 31 equals 1. |
| 636 | // New result = (result eor 0xffffffff) + 1 = 0 - result. |
| 637 | __ eor(result_reg, result_reg, Operand(scratch_high, ASR, 31)); |
| 638 | __ add(result_reg, result_reg, Operand(scratch_high, LSR, 31)); |
| 639 | |
| 640 | __ bind(&done); |
| 641 | |
| 642 | __ Pop(scratch_high, scratch_low); |
| 643 | __ Ret(); |
| 644 | } |
| 645 | |
| 646 | |
dslomov@chromium.org | e97852d | 2013-09-12 09:02:59 +0000 | [diff] [blame] | 647 | bool WriteInt32ToHeapNumberStub::IsPregenerated(Isolate* isolate) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 648 | // These variants are compiled ahead of time. See next method. |
| 649 | if (the_int_.is(r1) && the_heap_number_.is(r0) && scratch_.is(r2)) { |
| 650 | return true; |
| 651 | } |
| 652 | if (the_int_.is(r2) && the_heap_number_.is(r0) && scratch_.is(r3)) { |
| 653 | return true; |
| 654 | } |
| 655 | // Other register combinations are generated as and when they are needed, |
| 656 | // so it is unsafe to call them from stubs (we can't generate a stub while |
| 657 | // we are generating a stub). |
| 658 | return false; |
| 659 | } |
| 660 | |
| 661 | |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 662 | void WriteInt32ToHeapNumberStub::GenerateFixedRegStubsAheadOfTime( |
| 663 | Isolate* isolate) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 664 | WriteInt32ToHeapNumberStub stub1(r1, r0, r2); |
| 665 | WriteInt32ToHeapNumberStub stub2(r2, r0, r3); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 666 | stub1.GetCode(isolate)->set_is_pregenerated(true); |
| 667 | stub2.GetCode(isolate)->set_is_pregenerated(true); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 668 | } |
| 669 | |
| 670 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 671 | // See comment for class. |
| 672 | void WriteInt32ToHeapNumberStub::Generate(MacroAssembler* masm) { |
| 673 | Label max_negative_int; |
| 674 | // the_int_ has the answer which is a signed int32 but not a Smi. |
| 675 | // We test for the special value that has a different exponent. This test |
| 676 | // has the neat side effect of setting the flags according to the sign. |
| 677 | STATIC_ASSERT(HeapNumber::kSignMask == 0x80000000u); |
| 678 | __ cmp(the_int_, Operand(0x80000000u)); |
| 679 | __ b(eq, &max_negative_int); |
| 680 | // Set up the correct exponent in scratch_. All non-Smi int32s have the same. |
| 681 | // A non-Smi integer is 1.xxx * 2^30 so the exponent is 30 (biased). |
| 682 | uint32_t non_smi_exponent = |
| 683 | (HeapNumber::kExponentBias + 30) << HeapNumber::kExponentShift; |
| 684 | __ mov(scratch_, Operand(non_smi_exponent)); |
| 685 | // Set the sign bit in scratch_ if the value was negative. |
| 686 | __ orr(scratch_, scratch_, Operand(HeapNumber::kSignMask), LeaveCC, cs); |
| 687 | // Subtract from 0 if the value was negative. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 688 | __ rsb(the_int_, the_int_, Operand::Zero(), LeaveCC, cs); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 689 | // We should be masking the implict first digit of the mantissa away here, |
| 690 | // but it just ends up combining harmlessly with the last digit of the |
| 691 | // exponent that happens to be 1. The sign bit is 0 so we shift 10 to get |
| 692 | // the most significant 1 to hit the last bit of the 12 bit sign and exponent. |
| 693 | ASSERT(((1 << HeapNumber::kExponentShift) & non_smi_exponent) != 0); |
| 694 | const int shift_distance = HeapNumber::kNonMantissaBitsInTopWord - 2; |
| 695 | __ orr(scratch_, scratch_, Operand(the_int_, LSR, shift_distance)); |
| 696 | __ str(scratch_, FieldMemOperand(the_heap_number_, |
| 697 | HeapNumber::kExponentOffset)); |
| 698 | __ mov(scratch_, Operand(the_int_, LSL, 32 - shift_distance)); |
| 699 | __ str(scratch_, FieldMemOperand(the_heap_number_, |
| 700 | HeapNumber::kMantissaOffset)); |
| 701 | __ Ret(); |
| 702 | |
| 703 | __ bind(&max_negative_int); |
| 704 | // The max negative int32 is stored as a positive number in the mantissa of |
| 705 | // a double because it uses a sign bit instead of using two's complement. |
| 706 | // The actual mantissa bits stored are all 0 because the implicit most |
| 707 | // significant 1 bit is not stored. |
| 708 | non_smi_exponent += 1 << HeapNumber::kExponentShift; |
| 709 | __ mov(ip, Operand(HeapNumber::kSignMask | non_smi_exponent)); |
| 710 | __ str(ip, FieldMemOperand(the_heap_number_, HeapNumber::kExponentOffset)); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 711 | __ mov(ip, Operand::Zero()); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 712 | __ str(ip, FieldMemOperand(the_heap_number_, HeapNumber::kMantissaOffset)); |
| 713 | __ Ret(); |
| 714 | } |
| 715 | |
| 716 | |
| 717 | // Handle the case where the lhs and rhs are the same object. |
| 718 | // Equality is almost reflexive (everything but NaN), so this is a test |
| 719 | // for "identity and not NaN". |
| 720 | static void EmitIdenticalObjectComparison(MacroAssembler* masm, |
| 721 | Label* slow, |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 722 | Condition cond) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 723 | Label not_identical; |
| 724 | Label heap_number, return_equal; |
| 725 | __ cmp(r0, r1); |
| 726 | __ b(ne, ¬_identical); |
| 727 | |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 728 | // Test for NaN. Sadly, we can't just compare to Factory::nan_value(), |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 729 | // so we do the second best thing - test it ourselves. |
| 730 | // They are both equal and they are not both Smis so both of them are not |
| 731 | // Smis. If it's not a heap number, then return equal. |
| 732 | if (cond == lt || cond == gt) { |
| 733 | __ CompareObjectType(r0, r4, r4, FIRST_SPEC_OBJECT_TYPE); |
| 734 | __ b(ge, slow); |
| 735 | } else { |
| 736 | __ CompareObjectType(r0, r4, r4, HEAP_NUMBER_TYPE); |
| 737 | __ b(eq, &heap_number); |
| 738 | // Comparing JS objects with <=, >= is complicated. |
| 739 | if (cond != eq) { |
| 740 | __ cmp(r4, Operand(FIRST_SPEC_OBJECT_TYPE)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 741 | __ b(ge, slow); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 742 | // Normally here we fall through to return_equal, but undefined is |
| 743 | // special: (undefined == undefined) == true, but |
| 744 | // (undefined <= undefined) == false! See ECMAScript 11.8.5. |
| 745 | if (cond == le || cond == ge) { |
| 746 | __ cmp(r4, Operand(ODDBALL_TYPE)); |
| 747 | __ b(ne, &return_equal); |
| 748 | __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| 749 | __ cmp(r0, r2); |
| 750 | __ b(ne, &return_equal); |
| 751 | if (cond == le) { |
| 752 | // undefined <= undefined should fail. |
| 753 | __ mov(r0, Operand(GREATER)); |
| 754 | } else { |
| 755 | // undefined >= undefined should fail. |
| 756 | __ mov(r0, Operand(LESS)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 757 | } |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 758 | __ Ret(); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 759 | } |
| 760 | } |
| 761 | } |
| 762 | |
| 763 | __ bind(&return_equal); |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 764 | if (cond == lt) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 765 | __ mov(r0, Operand(GREATER)); // Things aren't less than themselves. |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 766 | } else if (cond == gt) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 767 | __ mov(r0, Operand(LESS)); // Things aren't greater than themselves. |
| 768 | } else { |
| 769 | __ mov(r0, Operand(EQUAL)); // Things are <=, >=, ==, === themselves. |
| 770 | } |
| 771 | __ Ret(); |
| 772 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 773 | // For less and greater we don't have to check for NaN since the result of |
| 774 | // x < x is false regardless. For the others here is some code to check |
| 775 | // for NaN. |
| 776 | if (cond != lt && cond != gt) { |
| 777 | __ bind(&heap_number); |
| 778 | // It is a heap number, so return non-equal if it's NaN and equal if it's |
| 779 | // not NaN. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 780 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 781 | // The representation of NaN values has all exponent bits (52..62) set, |
| 782 | // and not all mantissa bits (0..51) clear. |
| 783 | // Read top bits of double representation (second word of value). |
| 784 | __ ldr(r2, FieldMemOperand(r0, HeapNumber::kExponentOffset)); |
| 785 | // Test that exponent bits are all set. |
| 786 | __ Sbfx(r3, r2, HeapNumber::kExponentShift, HeapNumber::kExponentBits); |
| 787 | // NaNs have all-one exponents so they sign extend to -1. |
| 788 | __ cmp(r3, Operand(-1)); |
| 789 | __ b(ne, &return_equal); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 790 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 791 | // Shift out flag and all exponent bits, retaining only mantissa. |
| 792 | __ mov(r2, Operand(r2, LSL, HeapNumber::kNonMantissaBitsInTopWord)); |
| 793 | // Or with all low-bits of mantissa. |
| 794 | __ ldr(r3, FieldMemOperand(r0, HeapNumber::kMantissaOffset)); |
| 795 | __ orr(r0, r3, Operand(r2), SetCC); |
| 796 | // For equal we already have the right value in r0: Return zero (equal) |
| 797 | // if all bits in mantissa are zero (it's an Infinity) and non-zero if |
| 798 | // not (it's a NaN). For <= and >= we need to load r0 with the failing |
| 799 | // value if it's a NaN. |
| 800 | if (cond != eq) { |
| 801 | // All-zero means Infinity means equal. |
| 802 | __ Ret(eq); |
| 803 | if (cond == le) { |
| 804 | __ mov(r0, Operand(GREATER)); // NaN <= NaN should fail. |
| 805 | } else { |
| 806 | __ mov(r0, Operand(LESS)); // NaN >= NaN should fail. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 807 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 808 | } |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 809 | __ Ret(); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 810 | } |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 811 | // No fall through here. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 812 | |
| 813 | __ bind(¬_identical); |
| 814 | } |
| 815 | |
| 816 | |
| 817 | // See comment at call site. |
| 818 | static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
| 819 | Register lhs, |
| 820 | Register rhs, |
| 821 | Label* lhs_not_nan, |
| 822 | Label* slow, |
| 823 | bool strict) { |
| 824 | ASSERT((lhs.is(r0) && rhs.is(r1)) || |
| 825 | (lhs.is(r1) && rhs.is(r0))); |
| 826 | |
| 827 | Label rhs_is_smi; |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 828 | __ JumpIfSmi(rhs, &rhs_is_smi); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 829 | |
| 830 | // Lhs is a Smi. Check whether the rhs is a heap number. |
| 831 | __ CompareObjectType(rhs, r4, r4, HEAP_NUMBER_TYPE); |
| 832 | if (strict) { |
| 833 | // If rhs is not a number and lhs is a Smi then strict equality cannot |
| 834 | // succeed. Return non-equal |
| 835 | // If rhs is r0 then there is already a non zero value in it. |
| 836 | if (!rhs.is(r0)) { |
| 837 | __ mov(r0, Operand(NOT_EQUAL), LeaveCC, ne); |
| 838 | } |
| 839 | __ Ret(ne); |
| 840 | } else { |
| 841 | // Smi compared non-strictly with a non-Smi non-heap-number. Call |
| 842 | // the runtime. |
| 843 | __ b(ne, slow); |
| 844 | } |
| 845 | |
| 846 | // Lhs is a smi, rhs is a number. |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 847 | // Convert lhs to a double in d7. |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 848 | __ SmiToDouble(d7, lhs); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 849 | // Load the double from rhs, tagged HeapNumber r0, to d6. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 850 | __ vldr(d6, rhs, HeapNumber::kValueOffset - kHeapObjectTag); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 851 | |
| 852 | // We now have both loaded as doubles but we can skip the lhs nan check |
| 853 | // since it's a smi. |
| 854 | __ jmp(lhs_not_nan); |
| 855 | |
| 856 | __ bind(&rhs_is_smi); |
| 857 | // Rhs is a smi. Check whether the non-smi lhs is a heap number. |
| 858 | __ CompareObjectType(lhs, r4, r4, HEAP_NUMBER_TYPE); |
| 859 | if (strict) { |
| 860 | // If lhs is not a number and rhs is a smi then strict equality cannot |
| 861 | // succeed. Return non-equal. |
| 862 | // If lhs is r0 then there is already a non zero value in it. |
| 863 | if (!lhs.is(r0)) { |
| 864 | __ mov(r0, Operand(NOT_EQUAL), LeaveCC, ne); |
| 865 | } |
| 866 | __ Ret(ne); |
| 867 | } else { |
| 868 | // Smi compared non-strictly with a non-smi non-heap-number. Call |
| 869 | // the runtime. |
| 870 | __ b(ne, slow); |
| 871 | } |
| 872 | |
| 873 | // Rhs is a smi, lhs is a heap number. |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 874 | // Load the double from lhs, tagged HeapNumber r1, to d7. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 875 | __ vldr(d7, lhs, HeapNumber::kValueOffset - kHeapObjectTag); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 876 | // Convert rhs to a double in d6 . |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 877 | __ SmiToDouble(d6, rhs); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 878 | // Fall through to both_loaded_as_doubles. |
| 879 | } |
| 880 | |
| 881 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 882 | // See comment at call site. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 883 | static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, |
| 884 | Register lhs, |
| 885 | Register rhs) { |
| 886 | ASSERT((lhs.is(r0) && rhs.is(r1)) || |
| 887 | (lhs.is(r1) && rhs.is(r0))); |
| 888 | |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 889 | // If either operand is a JS object or an oddball value, then they are |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 890 | // not equal since their pointers are different. |
| 891 | // There is no test for undetectability in strict equality. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 892 | STATIC_ASSERT(LAST_TYPE == LAST_SPEC_OBJECT_TYPE); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 893 | Label first_non_object; |
| 894 | // Get the type of the first operand into r2 and compare it with |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 895 | // FIRST_SPEC_OBJECT_TYPE. |
| 896 | __ CompareObjectType(rhs, r2, r2, FIRST_SPEC_OBJECT_TYPE); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 897 | __ b(lt, &first_non_object); |
| 898 | |
| 899 | // Return non-zero (r0 is not zero) |
| 900 | Label return_not_equal; |
| 901 | __ bind(&return_not_equal); |
| 902 | __ Ret(); |
| 903 | |
| 904 | __ bind(&first_non_object); |
| 905 | // Check for oddballs: true, false, null, undefined. |
| 906 | __ cmp(r2, Operand(ODDBALL_TYPE)); |
| 907 | __ b(eq, &return_not_equal); |
| 908 | |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 909 | __ CompareObjectType(lhs, r3, r3, FIRST_SPEC_OBJECT_TYPE); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 910 | __ b(ge, &return_not_equal); |
| 911 | |
| 912 | // Check for oddballs: true, false, null, undefined. |
| 913 | __ cmp(r3, Operand(ODDBALL_TYPE)); |
| 914 | __ b(eq, &return_not_equal); |
| 915 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 916 | // Now that we have the types we might as well check for |
| 917 | // internalized-internalized. |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 918 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| 919 | __ orr(r2, r2, Operand(r3)); |
| 920 | __ tst(r2, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| 921 | __ b(eq, &return_not_equal); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 922 | } |
| 923 | |
| 924 | |
| 925 | // See comment at call site. |
| 926 | static void EmitCheckForTwoHeapNumbers(MacroAssembler* masm, |
| 927 | Register lhs, |
| 928 | Register rhs, |
| 929 | Label* both_loaded_as_doubles, |
| 930 | Label* not_heap_numbers, |
| 931 | Label* slow) { |
| 932 | ASSERT((lhs.is(r0) && rhs.is(r1)) || |
| 933 | (lhs.is(r1) && rhs.is(r0))); |
| 934 | |
| 935 | __ CompareObjectType(rhs, r3, r2, HEAP_NUMBER_TYPE); |
| 936 | __ b(ne, not_heap_numbers); |
| 937 | __ ldr(r2, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| 938 | __ cmp(r2, r3); |
| 939 | __ b(ne, slow); // First was a heap number, second wasn't. Go slow case. |
| 940 | |
| 941 | // Both are heap numbers. Load them up then jump to the code we have |
| 942 | // for that. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 943 | __ vldr(d6, rhs, HeapNumber::kValueOffset - kHeapObjectTag); |
| 944 | __ vldr(d7, lhs, HeapNumber::kValueOffset - kHeapObjectTag); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 945 | __ jmp(both_loaded_as_doubles); |
| 946 | } |
| 947 | |
| 948 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 949 | // Fast negative check for internalized-to-internalized equality. |
| 950 | static void EmitCheckForInternalizedStringsOrObjects(MacroAssembler* masm, |
| 951 | Register lhs, |
| 952 | Register rhs, |
| 953 | Label* possible_strings, |
| 954 | Label* not_both_strings) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 955 | ASSERT((lhs.is(r0) && rhs.is(r1)) || |
| 956 | (lhs.is(r1) && rhs.is(r0))); |
| 957 | |
| 958 | // r2 is object type of rhs. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 959 | Label object_test; |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 960 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 961 | __ tst(r2, Operand(kIsNotStringMask)); |
| 962 | __ b(ne, &object_test); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 963 | __ tst(r2, Operand(kIsNotInternalizedMask)); |
| 964 | __ b(ne, possible_strings); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 965 | __ CompareObjectType(lhs, r3, r3, FIRST_NONSTRING_TYPE); |
| 966 | __ b(ge, not_both_strings); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 967 | __ tst(r3, Operand(kIsNotInternalizedMask)); |
| 968 | __ b(ne, possible_strings); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 969 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 970 | // Both are internalized. We already checked they weren't the same pointer |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 971 | // so they are not equal. |
| 972 | __ mov(r0, Operand(NOT_EQUAL)); |
| 973 | __ Ret(); |
| 974 | |
| 975 | __ bind(&object_test); |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 976 | __ cmp(r2, Operand(FIRST_SPEC_OBJECT_TYPE)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 977 | __ b(lt, not_both_strings); |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 978 | __ CompareObjectType(lhs, r2, r3, FIRST_SPEC_OBJECT_TYPE); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 979 | __ b(lt, not_both_strings); |
| 980 | // If both objects are undetectable, they are equal. Otherwise, they |
| 981 | // are not equal, since they are different objects and an object is not |
| 982 | // equal to undefined. |
| 983 | __ ldr(r3, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| 984 | __ ldrb(r2, FieldMemOperand(r2, Map::kBitFieldOffset)); |
| 985 | __ ldrb(r3, FieldMemOperand(r3, Map::kBitFieldOffset)); |
| 986 | __ and_(r0, r2, Operand(r3)); |
| 987 | __ and_(r0, r0, Operand(1 << Map::kIsUndetectable)); |
| 988 | __ eor(r0, r0, Operand(1 << Map::kIsUndetectable)); |
| 989 | __ Ret(); |
| 990 | } |
| 991 | |
| 992 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 993 | static void ICCompareStub_CheckInputType(MacroAssembler* masm, |
| 994 | Register input, |
| 995 | Register scratch, |
| 996 | CompareIC::State expected, |
| 997 | Label* fail) { |
| 998 | Label ok; |
| 999 | if (expected == CompareIC::SMI) { |
| 1000 | __ JumpIfNotSmi(input, fail); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 1001 | } else if (expected == CompareIC::NUMBER) { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1002 | __ JumpIfSmi(input, &ok); |
| 1003 | __ CheckMap(input, scratch, Heap::kHeapNumberMapRootIndex, fail, |
| 1004 | DONT_DO_SMI_CHECK); |
| 1005 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1006 | // We could be strict about internalized/non-internalized here, but as long as |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1007 | // hydrogen doesn't care, the stub doesn't have to care either. |
| 1008 | __ bind(&ok); |
| 1009 | } |
| 1010 | |
| 1011 | |
| 1012 | // On entry r1 and r2 are the values to be compared. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1013 | // On exit r0 is 0, positive or negative to indicate the result of |
| 1014 | // the comparison. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1015 | void ICCompareStub::GenerateGeneric(MacroAssembler* masm) { |
| 1016 | Register lhs = r1; |
| 1017 | Register rhs = r0; |
| 1018 | Condition cc = GetCondition(); |
| 1019 | |
| 1020 | Label miss; |
| 1021 | ICCompareStub_CheckInputType(masm, lhs, r2, left_, &miss); |
| 1022 | ICCompareStub_CheckInputType(masm, rhs, r3, right_, &miss); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1023 | |
| 1024 | Label slow; // Call builtin. |
| 1025 | Label not_smis, both_loaded_as_doubles, lhs_not_nan; |
| 1026 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1027 | Label not_two_smis, smi_done; |
| 1028 | __ orr(r2, r1, r0); |
| 1029 | __ JumpIfNotSmi(r2, ¬_two_smis); |
| 1030 | __ mov(r1, Operand(r1, ASR, 1)); |
| 1031 | __ sub(r0, r1, Operand(r0, ASR, 1)); |
| 1032 | __ Ret(); |
| 1033 | __ bind(¬_two_smis); |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 1034 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1035 | // NOTICE! This code is only reached after a smi-fast-case check, so |
| 1036 | // it is certain that at least one operand isn't a smi. |
| 1037 | |
| 1038 | // Handle the case where the objects are identical. Either returns the answer |
| 1039 | // or goes to slow. Only falls through if the objects were not identical. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1040 | EmitIdenticalObjectComparison(masm, &slow, cc); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1041 | |
| 1042 | // If either is a Smi (we know that not both are), then they can only |
| 1043 | // be strictly equal if the other is a HeapNumber. |
| 1044 | STATIC_ASSERT(kSmiTag == 0); |
| 1045 | ASSERT_EQ(0, Smi::FromInt(0)); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1046 | __ and_(r2, lhs, Operand(rhs)); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 1047 | __ JumpIfNotSmi(r2, ¬_smis); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1048 | // One operand is a smi. EmitSmiNonsmiComparison generates code that can: |
| 1049 | // 1) Return the answer. |
| 1050 | // 2) Go to slow. |
| 1051 | // 3) Fall through to both_loaded_as_doubles. |
| 1052 | // 4) Jump to lhs_not_nan. |
| 1053 | // In cases 3 and 4 we have found out we were dealing with a number-number |
| 1054 | // comparison. If VFP3 is supported the double values of the numbers have |
| 1055 | // been loaded into d7 and d6. Otherwise, the double values have been loaded |
| 1056 | // into r0, r1, r2, and r3. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1057 | EmitSmiNonsmiComparison(masm, lhs, rhs, &lhs_not_nan, &slow, strict()); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1058 | |
| 1059 | __ bind(&both_loaded_as_doubles); |
| 1060 | // The arguments have been converted to doubles and stored in d6 and d7, if |
| 1061 | // VFP3 is supported, or in r0, r1, r2, and r3. |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1062 | Isolate* isolate = masm->isolate(); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1063 | __ bind(&lhs_not_nan); |
| 1064 | Label no_nan; |
| 1065 | // ARMv7 VFP3 instructions to implement double precision comparison. |
| 1066 | __ VFPCompareAndSetFlags(d7, d6); |
| 1067 | Label nan; |
| 1068 | __ b(vs, &nan); |
| 1069 | __ mov(r0, Operand(EQUAL), LeaveCC, eq); |
| 1070 | __ mov(r0, Operand(LESS), LeaveCC, lt); |
| 1071 | __ mov(r0, Operand(GREATER), LeaveCC, gt); |
| 1072 | __ Ret(); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1073 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1074 | __ bind(&nan); |
| 1075 | // If one of the sides was a NaN then the v flag is set. Load r0 with |
| 1076 | // whatever it takes to make the comparison fail, since comparisons with NaN |
| 1077 | // always fail. |
| 1078 | if (cc == lt || cc == le) { |
| 1079 | __ mov(r0, Operand(GREATER)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1080 | } else { |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1081 | __ mov(r0, Operand(LESS)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1082 | } |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1083 | __ Ret(); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1084 | |
| 1085 | __ bind(¬_smis); |
| 1086 | // At this point we know we are dealing with two different objects, |
| 1087 | // and neither of them is a Smi. The objects are in rhs_ and lhs_. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1088 | if (strict()) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1089 | // This returns non-equal for some object types, or falls through if it |
| 1090 | // was not lucky. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1091 | EmitStrictTwoHeapObjectCompare(masm, lhs, rhs); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1092 | } |
| 1093 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1094 | Label check_for_internalized_strings; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1095 | Label flat_string_check; |
| 1096 | // Check for heap-number-heap-number comparison. Can jump to slow case, |
| 1097 | // or load both doubles into r0, r1, r2, r3 and jump to the code that handles |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1098 | // that case. If the inputs are not doubles then jumps to |
| 1099 | // check_for_internalized_strings. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1100 | // In this case r2 will contain the type of rhs_. Never falls through. |
| 1101 | EmitCheckForTwoHeapNumbers(masm, |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1102 | lhs, |
| 1103 | rhs, |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1104 | &both_loaded_as_doubles, |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1105 | &check_for_internalized_strings, |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1106 | &flat_string_check); |
| 1107 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1108 | __ bind(&check_for_internalized_strings); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1109 | // In the strict case the EmitStrictTwoHeapObjectCompare already took care of |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1110 | // internalized strings. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1111 | if (cc == eq && !strict()) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1112 | // Returns an answer for two internalized strings or two detectable objects. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1113 | // Otherwise jumps to string case or not both strings case. |
| 1114 | // Assumes that r2 is the type of rhs_ on entry. |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1115 | EmitCheckForInternalizedStringsOrObjects( |
| 1116 | masm, lhs, rhs, &flat_string_check, &slow); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1117 | } |
| 1118 | |
| 1119 | // Check for both being sequential ASCII strings, and inline if that is the |
| 1120 | // case. |
| 1121 | __ bind(&flat_string_check); |
| 1122 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1123 | __ JumpIfNonSmisNotBothSequentialAsciiStrings(lhs, rhs, r2, r3, &slow); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1124 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1125 | __ IncrementCounter(isolate->counters()->string_compare_native(), 1, r2, r3); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1126 | if (cc == eq) { |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1127 | StringCompareStub::GenerateFlatAsciiStringEquals(masm, |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1128 | lhs, |
| 1129 | rhs, |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1130 | r2, |
| 1131 | r3, |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1132 | r4); |
| 1133 | } else { |
| 1134 | StringCompareStub::GenerateCompareFlatAsciiStrings(masm, |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1135 | lhs, |
| 1136 | rhs, |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 1137 | r2, |
| 1138 | r3, |
| 1139 | r4, |
| 1140 | r5); |
| 1141 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1142 | // Never falls through to here. |
| 1143 | |
| 1144 | __ bind(&slow); |
| 1145 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1146 | __ Push(lhs, rhs); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1147 | // Figure out which native to call and setup the arguments. |
| 1148 | Builtins::JavaScript native; |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1149 | if (cc == eq) { |
| 1150 | native = strict() ? Builtins::STRICT_EQUALS : Builtins::EQUALS; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1151 | } else { |
| 1152 | native = Builtins::COMPARE; |
| 1153 | int ncr; // NaN compare result |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1154 | if (cc == lt || cc == le) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1155 | ncr = GREATER; |
| 1156 | } else { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1157 | ASSERT(cc == gt || cc == ge); // remaining cases |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1158 | ncr = LESS; |
| 1159 | } |
| 1160 | __ mov(r0, Operand(Smi::FromInt(ncr))); |
| 1161 | __ push(r0); |
| 1162 | } |
| 1163 | |
| 1164 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 1165 | // tagged as a small integer. |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 1166 | __ InvokeBuiltin(native, JUMP_FUNCTION); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1167 | |
| 1168 | __ bind(&miss); |
| 1169 | GenerateMiss(masm); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1173 | void StoreBufferOverflowStub::Generate(MacroAssembler* masm) { |
| 1174 | // We don't allow a GC during a store buffer overflow so there is no need to |
| 1175 | // store the registers in any particular way, but we do have to store and |
| 1176 | // restore them. |
| 1177 | __ stm(db_w, sp, kCallerSaved | lr.bit()); |
yangguo@chromium.org | 003650e | 2013-01-24 16:31:08 +0000 | [diff] [blame] | 1178 | |
| 1179 | const Register scratch = r1; |
| 1180 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1181 | if (save_doubles_ == kSaveFPRegs) { |
ulan@chromium.org | 77ca49a | 2013-04-22 09:43:56 +0000 | [diff] [blame] | 1182 | __ SaveFPRegs(sp, scratch); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1183 | } |
| 1184 | const int argument_count = 1; |
| 1185 | const int fp_argument_count = 0; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1186 | |
| 1187 | AllowExternalCallThatCantCauseGC scope(masm); |
| 1188 | __ PrepareCallCFunction(argument_count, fp_argument_count, scratch); |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 1189 | __ mov(r0, Operand(ExternalReference::isolate_address(masm->isolate()))); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1190 | __ CallCFunction( |
| 1191 | ExternalReference::store_buffer_overflow_function(masm->isolate()), |
| 1192 | argument_count); |
| 1193 | if (save_doubles_ == kSaveFPRegs) { |
ulan@chromium.org | 77ca49a | 2013-04-22 09:43:56 +0000 | [diff] [blame] | 1194 | __ RestoreFPRegs(sp, scratch); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1195 | } |
| 1196 | __ ldm(ia_w, sp, kCallerSaved | pc.bit()); // Also pop pc to get Ret(0). |
| 1197 | } |
| 1198 | |
| 1199 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1200 | void TranscendentalCacheStub::Generate(MacroAssembler* masm) { |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1201 | // Untagged case: double input in d2, double result goes |
| 1202 | // into d2. |
| 1203 | // Tagged case: tagged input on top of stack and in r0, |
| 1204 | // tagged result (heap number) goes into r0. |
| 1205 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1206 | Label input_not_smi; |
| 1207 | Label loaded; |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1208 | Label calculate; |
| 1209 | Label invalid_cache; |
| 1210 | const Register scratch0 = r9; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 1211 | Register scratch1 = no_reg; // will be r4 |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1212 | const Register cache_entry = r0; |
| 1213 | const bool tagged = (argument_type_ == TAGGED); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1214 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1215 | if (tagged) { |
| 1216 | // Argument is a number and is on stack and in r0. |
| 1217 | // Load argument and check if it is a smi. |
| 1218 | __ JumpIfNotSmi(r0, &input_not_smi); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1219 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1220 | // Input is a smi. Convert to double and load the low and high words |
| 1221 | // of the double into r2, r3. |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 1222 | __ SmiToDouble(d7, r0); |
| 1223 | __ vmov(r2, r3, d7); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1224 | __ b(&loaded); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1225 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1226 | __ bind(&input_not_smi); |
| 1227 | // Check if input is a HeapNumber. |
| 1228 | __ CheckMap(r0, |
| 1229 | r1, |
| 1230 | Heap::kHeapNumberMapRootIndex, |
| 1231 | &calculate, |
| 1232 | DONT_DO_SMI_CHECK); |
| 1233 | // Input is a HeapNumber. Load it to a double register and store the |
| 1234 | // low and high words into r2, r3. |
| 1235 | __ vldr(d0, FieldMemOperand(r0, HeapNumber::kValueOffset)); |
| 1236 | __ vmov(r2, r3, d0); |
| 1237 | } else { |
| 1238 | // Input is untagged double in d2. Output goes to d2. |
| 1239 | __ vmov(r2, r3, d2); |
| 1240 | } |
| 1241 | __ bind(&loaded); |
| 1242 | // r2 = low 32 bits of double value |
| 1243 | // r3 = high 32 bits of double value |
| 1244 | // Compute hash (the shifts are arithmetic): |
| 1245 | // h = (low ^ high); h ^= h >> 16; h ^= h >> 8; h = h & (cacheSize - 1); |
| 1246 | __ eor(r1, r2, Operand(r3)); |
| 1247 | __ eor(r1, r1, Operand(r1, ASR, 16)); |
| 1248 | __ eor(r1, r1, Operand(r1, ASR, 8)); |
| 1249 | ASSERT(IsPowerOf2(TranscendentalCache::SubCache::kCacheSize)); |
| 1250 | __ And(r1, r1, Operand(TranscendentalCache::SubCache::kCacheSize - 1)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1251 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1252 | // r2 = low 32 bits of double value. |
| 1253 | // r3 = high 32 bits of double value. |
| 1254 | // r1 = TranscendentalCache::hash(double value). |
| 1255 | Isolate* isolate = masm->isolate(); |
| 1256 | ExternalReference cache_array = |
| 1257 | ExternalReference::transcendental_cache_array_address(isolate); |
| 1258 | __ mov(cache_entry, Operand(cache_array)); |
| 1259 | // cache_entry points to cache array. |
| 1260 | int cache_array_index |
| 1261 | = type_ * sizeof(isolate->transcendental_cache()->caches_[0]); |
| 1262 | __ ldr(cache_entry, MemOperand(cache_entry, cache_array_index)); |
| 1263 | // r0 points to the cache for the type type_. |
| 1264 | // If NULL, the cache hasn't been initialized yet, so go through runtime. |
| 1265 | __ cmp(cache_entry, Operand::Zero()); |
| 1266 | __ b(eq, &invalid_cache); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1267 | |
| 1268 | #ifdef DEBUG |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1269 | // Check that the layout of cache elements match expectations. |
| 1270 | { TranscendentalCache::SubCache::Element test_elem[2]; |
| 1271 | char* elem_start = reinterpret_cast<char*>(&test_elem[0]); |
| 1272 | char* elem2_start = reinterpret_cast<char*>(&test_elem[1]); |
| 1273 | char* elem_in0 = reinterpret_cast<char*>(&(test_elem[0].in[0])); |
| 1274 | char* elem_in1 = reinterpret_cast<char*>(&(test_elem[0].in[1])); |
| 1275 | char* elem_out = reinterpret_cast<char*>(&(test_elem[0].output)); |
| 1276 | CHECK_EQ(12, elem2_start - elem_start); // Two uint_32's and a pointer. |
| 1277 | CHECK_EQ(0, elem_in0 - elem_start); |
| 1278 | CHECK_EQ(kIntSize, elem_in1 - elem_start); |
| 1279 | CHECK_EQ(2 * kIntSize, elem_out - elem_start); |
| 1280 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1281 | #endif |
| 1282 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1283 | // Find the address of the r1'st entry in the cache, i.e., &r0[r1*12]. |
| 1284 | __ add(r1, r1, Operand(r1, LSL, 1)); |
| 1285 | __ add(cache_entry, cache_entry, Operand(r1, LSL, 2)); |
| 1286 | // Check if cache matches: Double value is stored in uint32_t[2] array. |
| 1287 | __ ldm(ia, cache_entry, r4.bit() | r5.bit() | r6.bit()); |
| 1288 | __ cmp(r2, r4); |
| 1289 | __ cmp(r3, r5, eq); |
| 1290 | __ b(ne, &calculate); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 1291 | |
| 1292 | scratch1 = r4; // Start of scratch1 range. |
| 1293 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1294 | // Cache hit. Load result, cleanup and return. |
| 1295 | Counters* counters = masm->isolate()->counters(); |
| 1296 | __ IncrementCounter( |
| 1297 | counters->transcendental_cache_hit(), 1, scratch0, scratch1); |
| 1298 | if (tagged) { |
| 1299 | // Pop input value from stack and load result into r0. |
| 1300 | __ pop(); |
| 1301 | __ mov(r0, Operand(r6)); |
| 1302 | } else { |
| 1303 | // Load result into d2. |
| 1304 | __ vldr(d2, FieldMemOperand(r6, HeapNumber::kValueOffset)); |
| 1305 | } |
| 1306 | __ Ret(); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1307 | |
| 1308 | __ bind(&calculate); |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 1309 | __ IncrementCounter( |
| 1310 | counters->transcendental_cache_miss(), 1, scratch0, scratch1); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1311 | if (tagged) { |
| 1312 | __ bind(&invalid_cache); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1313 | ExternalReference runtime_function = |
| 1314 | ExternalReference(RuntimeFunction(), masm->isolate()); |
| 1315 | __ TailCallExternalReference(runtime_function, 1, 1); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1316 | } else { |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1317 | Label no_update; |
| 1318 | Label skip_cache; |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1319 | |
| 1320 | // Call C function to calculate the result and update the cache. |
jkummerow@chromium.org | 28583c9 | 2012-07-16 11:31:55 +0000 | [diff] [blame] | 1321 | // r0: precalculated cache entry address. |
| 1322 | // r2 and r3: parts of the double value. |
| 1323 | // Store r0, r2 and r3 on stack for later before calling C function. |
| 1324 | __ Push(r3, r2, cache_entry); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1325 | GenerateCallCFunction(masm, scratch0); |
| 1326 | __ GetCFunctionDoubleResult(d2); |
| 1327 | |
| 1328 | // Try to update the cache. If we cannot allocate a |
| 1329 | // heap number, we return the result without updating. |
jkummerow@chromium.org | 28583c9 | 2012-07-16 11:31:55 +0000 | [diff] [blame] | 1330 | __ Pop(r3, r2, cache_entry); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1331 | __ LoadRoot(r5, Heap::kHeapNumberMapRootIndex); |
| 1332 | __ AllocateHeapNumber(r6, scratch0, scratch1, r5, &no_update); |
| 1333 | __ vstr(d2, FieldMemOperand(r6, HeapNumber::kValueOffset)); |
| 1334 | __ stm(ia, cache_entry, r2.bit() | r3.bit() | r6.bit()); |
| 1335 | __ Ret(); |
| 1336 | |
| 1337 | __ bind(&invalid_cache); |
| 1338 | // The cache is invalid. Call runtime which will recreate the |
| 1339 | // cache. |
| 1340 | __ LoadRoot(r5, Heap::kHeapNumberMapRootIndex); |
| 1341 | __ AllocateHeapNumber(r0, scratch0, scratch1, r5, &skip_cache); |
| 1342 | __ vstr(d2, FieldMemOperand(r0, HeapNumber::kValueOffset)); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1343 | { |
| 1344 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1345 | __ push(r0); |
| 1346 | __ CallRuntime(RuntimeFunction(), 1); |
| 1347 | } |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1348 | __ vldr(d2, FieldMemOperand(r0, HeapNumber::kValueOffset)); |
| 1349 | __ Ret(); |
| 1350 | |
| 1351 | __ bind(&skip_cache); |
| 1352 | // Call C function to calculate the result and answer directly |
| 1353 | // without updating the cache. |
| 1354 | GenerateCallCFunction(masm, scratch0); |
| 1355 | __ GetCFunctionDoubleResult(d2); |
| 1356 | __ bind(&no_update); |
| 1357 | |
| 1358 | // We return the value in d2 without adding it to the cache, but |
| 1359 | // we cause a scavenging GC so that future allocations will succeed. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1360 | { |
| 1361 | FrameScope scope(masm, StackFrame::INTERNAL); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1362 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1363 | // Allocate an aligned object larger than a HeapNumber. |
| 1364 | ASSERT(4 * kPointerSize >= HeapNumber::kSize); |
| 1365 | __ mov(scratch0, Operand(4 * kPointerSize)); |
| 1366 | __ push(scratch0); |
| 1367 | __ CallRuntimeSaveDoubles(Runtime::kAllocateInNewSpace); |
| 1368 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1369 | __ Ret(); |
| 1370 | } |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1371 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1372 | |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1373 | |
| 1374 | void TranscendentalCacheStub::GenerateCallCFunction(MacroAssembler* masm, |
| 1375 | Register scratch) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1376 | Isolate* isolate = masm->isolate(); |
| 1377 | |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1378 | __ push(lr); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 1379 | __ PrepareCallCFunction(0, 1, scratch); |
| 1380 | if (masm->use_eabi_hardfloat()) { |
| 1381 | __ vmov(d0, d2); |
| 1382 | } else { |
| 1383 | __ vmov(r0, r1, d2); |
| 1384 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1385 | AllowExternalCallThatCantCauseGC scope(masm); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1386 | switch (type_) { |
| 1387 | case TranscendentalCache::SIN: |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 1388 | __ CallCFunction(ExternalReference::math_sin_double_function(isolate), |
| 1389 | 0, 1); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1390 | break; |
| 1391 | case TranscendentalCache::COS: |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 1392 | __ CallCFunction(ExternalReference::math_cos_double_function(isolate), |
| 1393 | 0, 1); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1394 | break; |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 1395 | case TranscendentalCache::TAN: |
| 1396 | __ CallCFunction(ExternalReference::math_tan_double_function(isolate), |
| 1397 | 0, 1); |
| 1398 | break; |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1399 | case TranscendentalCache::LOG: |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 1400 | __ CallCFunction(ExternalReference::math_log_double_function(isolate), |
| 1401 | 0, 1); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1402 | break; |
| 1403 | default: |
| 1404 | UNIMPLEMENTED(); |
| 1405 | break; |
| 1406 | } |
| 1407 | __ pop(lr); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1408 | } |
| 1409 | |
| 1410 | |
| 1411 | Runtime::FunctionId TranscendentalCacheStub::RuntimeFunction() { |
| 1412 | switch (type_) { |
| 1413 | // Add more cases when necessary. |
| 1414 | case TranscendentalCache::SIN: return Runtime::kMath_sin; |
| 1415 | case TranscendentalCache::COS: return Runtime::kMath_cos; |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 1416 | case TranscendentalCache::TAN: return Runtime::kMath_tan; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1417 | case TranscendentalCache::LOG: return Runtime::kMath_log; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1418 | default: |
| 1419 | UNIMPLEMENTED(); |
| 1420 | return Runtime::kAbort; |
| 1421 | } |
| 1422 | } |
| 1423 | |
| 1424 | |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1425 | void MathPowStub::Generate(MacroAssembler* masm) { |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1426 | const Register base = r1; |
| 1427 | const Register exponent = r2; |
| 1428 | const Register heapnumbermap = r5; |
| 1429 | const Register heapnumber = r0; |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 1430 | const DwVfpRegister double_base = d1; |
| 1431 | const DwVfpRegister double_exponent = d2; |
| 1432 | const DwVfpRegister double_result = d3; |
| 1433 | const DwVfpRegister double_scratch = d0; |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1434 | const SwVfpRegister single_scratch = s0; |
| 1435 | const Register scratch = r9; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 1436 | const Register scratch2 = r4; |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1437 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 1438 | Label call_runtime, done, int_exponent; |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1439 | if (exponent_type_ == ON_STACK) { |
| 1440 | Label base_is_smi, unpack_exponent; |
| 1441 | // The exponent and base are supplied as arguments on the stack. |
| 1442 | // This can only happen if the stub is called from non-optimized code. |
| 1443 | // Load input parameters from stack to double registers. |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1444 | __ ldr(base, MemOperand(sp, 1 * kPointerSize)); |
| 1445 | __ ldr(exponent, MemOperand(sp, 0 * kPointerSize)); |
| 1446 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1447 | __ LoadRoot(heapnumbermap, Heap::kHeapNumberMapRootIndex); |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1448 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 1449 | __ UntagAndJumpIfSmi(scratch, base, &base_is_smi); |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1450 | __ ldr(scratch, FieldMemOperand(base, JSObject::kMapOffset)); |
| 1451 | __ cmp(scratch, heapnumbermap); |
| 1452 | __ b(ne, &call_runtime); |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1453 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1454 | __ vldr(double_base, FieldMemOperand(base, HeapNumber::kValueOffset)); |
| 1455 | __ jmp(&unpack_exponent); |
| 1456 | |
| 1457 | __ bind(&base_is_smi); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 1458 | __ vmov(single_scratch, scratch); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1459 | __ vcvt_f64_s32(double_base, single_scratch); |
| 1460 | __ bind(&unpack_exponent); |
| 1461 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 1462 | __ UntagAndJumpIfSmi(scratch, exponent, &int_exponent); |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1463 | |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1464 | __ ldr(scratch, FieldMemOperand(exponent, JSObject::kMapOffset)); |
| 1465 | __ cmp(scratch, heapnumbermap); |
| 1466 | __ b(ne, &call_runtime); |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1467 | __ vldr(double_exponent, |
| 1468 | FieldMemOperand(exponent, HeapNumber::kValueOffset)); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1469 | } else if (exponent_type_ == TAGGED) { |
| 1470 | // Base is already in double_base. |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 1471 | __ UntagAndJumpIfSmi(scratch, exponent, &int_exponent); |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1472 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1473 | __ vldr(double_exponent, |
| 1474 | FieldMemOperand(exponent, HeapNumber::kValueOffset)); |
| 1475 | } |
| 1476 | |
| 1477 | if (exponent_type_ != INTEGER) { |
| 1478 | Label int_exponent_convert; |
| 1479 | // Detect integer exponents stored as double. |
| 1480 | __ vcvt_u32_f64(single_scratch, double_exponent); |
| 1481 | // We do not check for NaN or Infinity here because comparing numbers on |
| 1482 | // ARM correctly distinguishes NaNs. We end up calling the built-in. |
| 1483 | __ vcvt_f64_u32(double_scratch, single_scratch); |
| 1484 | __ VFPCompareAndSetFlags(double_scratch, double_exponent); |
| 1485 | __ b(eq, &int_exponent_convert); |
| 1486 | |
| 1487 | if (exponent_type_ == ON_STACK) { |
| 1488 | // Detect square root case. Crankshaft detects constant +/-0.5 at |
| 1489 | // compile time and uses DoMathPowHalf instead. We then skip this check |
| 1490 | // for non-constant cases of +/-0.5 as these hardly occur. |
| 1491 | Label not_plus_half; |
| 1492 | |
| 1493 | // Test for 0.5. |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 1494 | __ vmov(double_scratch, 0.5, scratch); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1495 | __ VFPCompareAndSetFlags(double_exponent, double_scratch); |
| 1496 | __ b(ne, ¬_plus_half); |
| 1497 | |
| 1498 | // Calculates square root of base. Check for the special case of |
| 1499 | // Math.pow(-Infinity, 0.5) == Infinity (ECMA spec, 15.8.2.13). |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 1500 | __ vmov(double_scratch, -V8_INFINITY, scratch); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1501 | __ VFPCompareAndSetFlags(double_base, double_scratch); |
| 1502 | __ vneg(double_result, double_scratch, eq); |
| 1503 | __ b(eq, &done); |
| 1504 | |
| 1505 | // Add +0 to convert -0 to +0. |
| 1506 | __ vadd(double_scratch, double_base, kDoubleRegZero); |
| 1507 | __ vsqrt(double_result, double_scratch); |
| 1508 | __ jmp(&done); |
| 1509 | |
| 1510 | __ bind(¬_plus_half); |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 1511 | __ vmov(double_scratch, -0.5, scratch); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1512 | __ VFPCompareAndSetFlags(double_exponent, double_scratch); |
| 1513 | __ b(ne, &call_runtime); |
| 1514 | |
| 1515 | // Calculates square root of base. Check for the special case of |
| 1516 | // Math.pow(-Infinity, -0.5) == 0 (ECMA spec, 15.8.2.13). |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 1517 | __ vmov(double_scratch, -V8_INFINITY, scratch); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1518 | __ VFPCompareAndSetFlags(double_base, double_scratch); |
| 1519 | __ vmov(double_result, kDoubleRegZero, eq); |
| 1520 | __ b(eq, &done); |
| 1521 | |
| 1522 | // Add +0 to convert -0 to +0. |
| 1523 | __ vadd(double_scratch, double_base, kDoubleRegZero); |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 1524 | __ vmov(double_result, 1.0, scratch); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1525 | __ vsqrt(double_scratch, double_scratch); |
| 1526 | __ vdiv(double_result, double_result, double_scratch); |
| 1527 | __ jmp(&done); |
| 1528 | } |
| 1529 | |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1530 | __ push(lr); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1531 | { |
| 1532 | AllowExternalCallThatCantCauseGC scope(masm); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1533 | __ PrepareCallCFunction(0, 2, scratch); |
| 1534 | __ SetCallCDoubleArguments(double_base, double_exponent); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1535 | __ CallCFunction( |
| 1536 | ExternalReference::power_double_double_function(masm->isolate()), |
| 1537 | 0, 2); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1538 | } |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1539 | __ pop(lr); |
| 1540 | __ GetCFunctionDoubleResult(double_result); |
| 1541 | __ jmp(&done); |
| 1542 | |
| 1543 | __ bind(&int_exponent_convert); |
| 1544 | __ vcvt_u32_f64(single_scratch, double_exponent); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 1545 | __ vmov(scratch, single_scratch); |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1546 | } |
| 1547 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1548 | // Calculate power with integer exponent. |
| 1549 | __ bind(&int_exponent); |
| 1550 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 1551 | // Get two copies of exponent in the registers scratch and exponent. |
| 1552 | if (exponent_type_ == INTEGER) { |
| 1553 | __ mov(scratch, exponent); |
| 1554 | } else { |
| 1555 | // Exponent has previously been stored into scratch as untagged integer. |
| 1556 | __ mov(exponent, scratch); |
| 1557 | } |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1558 | __ vmov(double_scratch, double_base); // Back up base. |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 1559 | __ vmov(double_result, 1.0, scratch2); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1560 | |
| 1561 | // Get absolute value of exponent. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 1562 | __ cmp(scratch, Operand::Zero()); |
| 1563 | __ mov(scratch2, Operand::Zero(), LeaveCC, mi); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1564 | __ sub(scratch, scratch2, scratch, LeaveCC, mi); |
| 1565 | |
| 1566 | Label while_true; |
| 1567 | __ bind(&while_true); |
| 1568 | __ mov(scratch, Operand(scratch, ASR, 1), SetCC); |
| 1569 | __ vmul(double_result, double_result, double_scratch, cs); |
| 1570 | __ vmul(double_scratch, double_scratch, double_scratch, ne); |
| 1571 | __ b(ne, &while_true); |
| 1572 | |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 1573 | __ cmp(exponent, Operand::Zero()); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1574 | __ b(ge, &done); |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 1575 | __ vmov(double_scratch, 1.0, scratch); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1576 | __ vdiv(double_result, double_scratch, double_result); |
| 1577 | // Test whether result is zero. Bail out to check for subnormal result. |
| 1578 | // Due to subnormals, x^-y == (1/x)^y does not hold in all cases. |
| 1579 | __ VFPCompareAndSetFlags(double_result, 0.0); |
| 1580 | __ b(ne, &done); |
| 1581 | // double_exponent may not containe the exponent value if the input was a |
| 1582 | // smi. We set it with exponent value before bailing out. |
| 1583 | __ vmov(single_scratch, exponent); |
| 1584 | __ vcvt_f64_s32(double_exponent, single_scratch); |
| 1585 | |
| 1586 | // Returning or bailing out. |
| 1587 | Counters* counters = masm->isolate()->counters(); |
| 1588 | if (exponent_type_ == ON_STACK) { |
| 1589 | // The arguments are still on the stack. |
| 1590 | __ bind(&call_runtime); |
| 1591 | __ TailCallRuntime(Runtime::kMath_pow_cfunction, 2, 1); |
| 1592 | |
| 1593 | // The stub is called from non-optimized code, which expects the result |
| 1594 | // as heap number in exponent. |
| 1595 | __ bind(&done); |
| 1596 | __ AllocateHeapNumber( |
| 1597 | heapnumber, scratch, scratch2, heapnumbermap, &call_runtime); |
| 1598 | __ vstr(double_result, |
| 1599 | FieldMemOperand(heapnumber, HeapNumber::kValueOffset)); |
| 1600 | ASSERT(heapnumber.is(r0)); |
| 1601 | __ IncrementCounter(counters->math_pow(), 1, scratch, scratch2); |
| 1602 | __ Ret(2); |
| 1603 | } else { |
| 1604 | __ push(lr); |
| 1605 | { |
| 1606 | AllowExternalCallThatCantCauseGC scope(masm); |
| 1607 | __ PrepareCallCFunction(0, 2, scratch); |
| 1608 | __ SetCallCDoubleArguments(double_base, double_exponent); |
| 1609 | __ CallCFunction( |
| 1610 | ExternalReference::power_double_double_function(masm->isolate()), |
| 1611 | 0, 2); |
| 1612 | } |
| 1613 | __ pop(lr); |
| 1614 | __ GetCFunctionDoubleResult(double_result); |
| 1615 | |
| 1616 | __ bind(&done); |
| 1617 | __ IncrementCounter(counters->math_pow(), 1, scratch, scratch2); |
| 1618 | __ Ret(); |
| 1619 | } |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 1620 | } |
| 1621 | |
| 1622 | |
| 1623 | bool CEntryStub::NeedsImmovableCode() { |
| 1624 | return true; |
| 1625 | } |
| 1626 | |
| 1627 | |
dslomov@chromium.org | e97852d | 2013-09-12 09:02:59 +0000 | [diff] [blame] | 1628 | bool CEntryStub::IsPregenerated(Isolate* isolate) { |
| 1629 | return (!save_doubles_ || isolate->fp_stubs_generated()) && |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1630 | result_size_ == 1; |
| 1631 | } |
| 1632 | |
| 1633 | |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 1634 | void CodeStub::GenerateStubsAheadOfTime(Isolate* isolate) { |
| 1635 | CEntryStub::GenerateAheadOfTime(isolate); |
| 1636 | WriteInt32ToHeapNumberStub::GenerateFixedRegStubsAheadOfTime(isolate); |
| 1637 | StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime(isolate); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1638 | StubFailureTrampolineStub::GenerateAheadOfTime(isolate); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 1639 | RecordWriteStub::GenerateFixedRegStubsAheadOfTime(isolate); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1640 | ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate); |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 1641 | CreateAllocationSiteStub::GenerateAheadOfTime(isolate); |
jkummerow@chromium.org | 25b0e21 | 2013-10-04 15:38:52 +0000 | [diff] [blame] | 1642 | BinaryOpStub::GenerateAheadOfTime(isolate); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1643 | } |
| 1644 | |
| 1645 | |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 1646 | void CodeStub::GenerateFPStubs(Isolate* isolate) { |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1647 | SaveFPRegsMode mode = kSaveFPRegs; |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 1648 | CEntryStub save_doubles(1, mode); |
| 1649 | StoreBufferOverflowStub stub(mode); |
| 1650 | // These stubs might already be in the snapshot, detect that and don't |
| 1651 | // regenerate, which would lead to code stub initialization state being messed |
| 1652 | // up. |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 1653 | Code* save_doubles_code; |
| 1654 | if (!save_doubles.FindCodeInCache(&save_doubles_code, isolate)) { |
| 1655 | save_doubles_code = *save_doubles.GetCode(isolate); |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 1656 | } |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1657 | Code* store_buffer_overflow_code; |
| 1658 | if (!stub.FindCodeInCache(&store_buffer_overflow_code, isolate)) { |
| 1659 | store_buffer_overflow_code = *stub.GetCode(isolate); |
| 1660 | } |
| 1661 | save_doubles_code->set_is_pregenerated(true); |
| 1662 | store_buffer_overflow_code->set_is_pregenerated(true); |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 1663 | isolate->set_fp_stubs_generated(true); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1664 | } |
| 1665 | |
| 1666 | |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 1667 | void CEntryStub::GenerateAheadOfTime(Isolate* isolate) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1668 | CEntryStub stub(1, kDontSaveFPRegs); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 1669 | Handle<Code> code = stub.GetCode(isolate); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1670 | code->set_is_pregenerated(true); |
| 1671 | } |
| 1672 | |
| 1673 | |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 1674 | static void JumpIfOOM(MacroAssembler* masm, |
| 1675 | Register value, |
| 1676 | Register scratch, |
| 1677 | Label* oom_label) { |
| 1678 | STATIC_ASSERT(Failure::OUT_OF_MEMORY_EXCEPTION == 3); |
| 1679 | STATIC_ASSERT(kFailureTag == 3); |
| 1680 | __ and_(scratch, value, Operand(0xf)); |
| 1681 | __ cmp(scratch, Operand(0xf)); |
| 1682 | __ b(eq, oom_label); |
| 1683 | } |
| 1684 | |
| 1685 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1686 | void CEntryStub::GenerateCore(MacroAssembler* masm, |
| 1687 | Label* throw_normal_exception, |
| 1688 | Label* throw_termination_exception, |
| 1689 | Label* throw_out_of_memory_exception, |
| 1690 | bool do_gc, |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1691 | bool always_allocate) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1692 | // r0: result parameter for PerformGC, if any |
| 1693 | // r4: number of arguments including receiver (C callee-saved) |
| 1694 | // r5: pointer to builtin function (C callee-saved) |
| 1695 | // r6: pointer to the first argument (C callee-saved) |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1696 | Isolate* isolate = masm->isolate(); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1697 | |
| 1698 | if (do_gc) { |
| 1699 | // Passing r0. |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 1700 | __ PrepareCallCFunction(2, 0, r1); |
| 1701 | __ mov(r1, Operand(ExternalReference::isolate_address(masm->isolate()))); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 1702 | __ CallCFunction(ExternalReference::perform_gc_function(isolate), |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 1703 | 2, 0); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1704 | } |
| 1705 | |
| 1706 | ExternalReference scope_depth = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1707 | ExternalReference::heap_always_allocate_scope_depth(isolate); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1708 | if (always_allocate) { |
| 1709 | __ mov(r0, Operand(scope_depth)); |
| 1710 | __ ldr(r1, MemOperand(r0)); |
| 1711 | __ add(r1, r1, Operand(1)); |
| 1712 | __ str(r1, MemOperand(r0)); |
| 1713 | } |
| 1714 | |
| 1715 | // Call C built-in. |
| 1716 | // r0 = argc, r1 = argv |
| 1717 | __ mov(r0, Operand(r4)); |
| 1718 | __ mov(r1, Operand(r6)); |
| 1719 | |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 1720 | #if V8_HOST_ARCH_ARM |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1721 | int frame_alignment = MacroAssembler::ActivationFrameAlignment(); |
| 1722 | int frame_alignment_mask = frame_alignment - 1; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1723 | if (FLAG_debug_code) { |
| 1724 | if (frame_alignment > kPointerSize) { |
| 1725 | Label alignment_as_expected; |
| 1726 | ASSERT(IsPowerOf2(frame_alignment)); |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 1727 | __ tst(sp, Operand(frame_alignment_mask)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1728 | __ b(eq, &alignment_as_expected); |
| 1729 | // Don't use Check here, as it will call Runtime_Abort re-entering here. |
| 1730 | __ stop("Unexpected alignment"); |
| 1731 | __ bind(&alignment_as_expected); |
| 1732 | } |
| 1733 | } |
| 1734 | #endif |
| 1735 | |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 1736 | __ mov(r2, Operand(ExternalReference::isolate_address(isolate))); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1737 | |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 1738 | // To let the GC traverse the return address of the exit frames, we need to |
| 1739 | // know where the return address is. The CEntryStub is unmovable, so |
| 1740 | // we can store the address on the stack to be able to find it again and |
| 1741 | // we never have to restore it, because it will not change. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1742 | // Compute the return address in lr to return to after the jump below. Pc is |
| 1743 | // already at '+ 8' from the current instruction but return is after three |
| 1744 | // instructions so add another 4 to pc to get the return address. |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 1745 | { |
| 1746 | // Prevent literal pool emission before return address. |
| 1747 | Assembler::BlockConstPoolScope block_const_pool(masm); |
| 1748 | masm->add(lr, pc, Operand(4)); |
| 1749 | __ str(lr, MemOperand(sp, 0)); |
| 1750 | masm->Jump(r5); |
| 1751 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1752 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1753 | __ VFPEnsureFPSCRState(r2); |
| 1754 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1755 | if (always_allocate) { |
| 1756 | // It's okay to clobber r2 and r3 here. Don't mess with r0 and r1 |
| 1757 | // though (contain the result). |
| 1758 | __ mov(r2, Operand(scope_depth)); |
| 1759 | __ ldr(r3, MemOperand(r2)); |
| 1760 | __ sub(r3, r3, Operand(1)); |
| 1761 | __ str(r3, MemOperand(r2)); |
| 1762 | } |
| 1763 | |
| 1764 | // check for failure result |
| 1765 | Label failure_returned; |
| 1766 | STATIC_ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
| 1767 | // Lower 2 bits of r2 are 0 iff r0 has failure tag. |
| 1768 | __ add(r2, r0, Operand(1)); |
| 1769 | __ tst(r2, Operand(kFailureTagMask)); |
| 1770 | __ b(eq, &failure_returned); |
| 1771 | |
| 1772 | // Exit C frame and return. |
| 1773 | // r0:r1: result |
| 1774 | // sp: stack pointer |
| 1775 | // fp: frame pointer |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 1776 | // Callee-saved register r4 still holds argc. |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 1777 | __ LeaveExitFrame(save_doubles_, r4, true); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 1778 | __ mov(pc, lr); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1779 | |
| 1780 | // check if we should retry or throw exception |
| 1781 | Label retry; |
| 1782 | __ bind(&failure_returned); |
| 1783 | STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0); |
| 1784 | __ tst(r0, Operand(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
| 1785 | __ b(eq, &retry); |
| 1786 | |
| 1787 | // Special handling of out of memory exceptions. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 1788 | JumpIfOOM(masm, r0, ip, throw_out_of_memory_exception); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1789 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1790 | // Retrieve the pending exception. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 1791 | __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1792 | isolate))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1793 | __ ldr(r0, MemOperand(ip)); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1794 | |
| 1795 | // See if we just retrieved an OOM exception. |
| 1796 | JumpIfOOM(masm, r0, ip, throw_out_of_memory_exception); |
| 1797 | |
| 1798 | // Clear the pending exception. |
| 1799 | __ mov(r3, Operand(isolate->factory()->the_hole_value())); |
| 1800 | __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| 1801 | isolate))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1802 | __ str(r3, MemOperand(ip)); |
| 1803 | |
| 1804 | // Special handling of termination exceptions which are uncatchable |
| 1805 | // by javascript code. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1806 | __ cmp(r0, Operand(isolate->factory()->termination_exception())); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1807 | __ b(eq, throw_termination_exception); |
| 1808 | |
| 1809 | // Handle normal exception. |
| 1810 | __ jmp(throw_normal_exception); |
| 1811 | |
| 1812 | __ bind(&retry); // pass last failure (r0) as parameter (r0) when retrying |
| 1813 | } |
| 1814 | |
| 1815 | |
| 1816 | void CEntryStub::Generate(MacroAssembler* masm) { |
| 1817 | // Called from JavaScript; parameters are on stack as if calling JS function |
| 1818 | // r0: number of arguments including receiver |
| 1819 | // r1: pointer to builtin function |
| 1820 | // fp: frame pointer (restored after C call) |
| 1821 | // sp: stack pointer (restored as callee's sp after C call) |
| 1822 | // cp: current context (C callee-saved) |
| 1823 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1824 | ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| 1825 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1826 | // Result returned in r0 or r0+r1 by default. |
| 1827 | |
| 1828 | // NOTE: Invocations of builtins may return failure objects |
| 1829 | // instead of a proper result. The builtin entry handles |
| 1830 | // this by performing a garbage collection and retrying the |
| 1831 | // builtin once. |
| 1832 | |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1833 | // Compute the argv pointer in a callee-saved register. |
| 1834 | __ add(r6, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| 1835 | __ sub(r6, r6, Operand(kPointerSize)); |
| 1836 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1837 | // Enter the exit frame that transitions from JavaScript to C++. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1838 | FrameScope scope(masm, StackFrame::MANUAL); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1839 | __ EnterExitFrame(save_doubles_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1840 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1841 | // Set up argc and the builtin function in callee-saved registers. |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1842 | __ mov(r4, Operand(r0)); |
| 1843 | __ mov(r5, Operand(r1)); |
| 1844 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1845 | // r4: number of arguments (C callee-saved) |
| 1846 | // r5: pointer to builtin function (C callee-saved) |
| 1847 | // r6: pointer to first argument (C callee-saved) |
| 1848 | |
| 1849 | Label throw_normal_exception; |
| 1850 | Label throw_termination_exception; |
| 1851 | Label throw_out_of_memory_exception; |
| 1852 | |
| 1853 | // Call into the runtime system. |
| 1854 | GenerateCore(masm, |
| 1855 | &throw_normal_exception, |
| 1856 | &throw_termination_exception, |
| 1857 | &throw_out_of_memory_exception, |
| 1858 | false, |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1859 | false); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1860 | |
| 1861 | // Do space-specific GC and retry runtime call. |
| 1862 | GenerateCore(masm, |
| 1863 | &throw_normal_exception, |
| 1864 | &throw_termination_exception, |
| 1865 | &throw_out_of_memory_exception, |
| 1866 | true, |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1867 | false); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1868 | |
| 1869 | // Do full GC and retry runtime call one final time. |
| 1870 | Failure* failure = Failure::InternalError(); |
| 1871 | __ mov(r0, Operand(reinterpret_cast<int32_t>(failure))); |
| 1872 | GenerateCore(masm, |
| 1873 | &throw_normal_exception, |
| 1874 | &throw_termination_exception, |
| 1875 | &throw_out_of_memory_exception, |
| 1876 | true, |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1877 | true); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1878 | |
| 1879 | __ bind(&throw_out_of_memory_exception); |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 1880 | // Set external caught exception to false. |
| 1881 | Isolate* isolate = masm->isolate(); |
| 1882 | ExternalReference external_caught(Isolate::kExternalCaughtExceptionAddress, |
| 1883 | isolate); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 1884 | __ mov(r0, Operand(false, RelocInfo::NONE32)); |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 1885 | __ mov(r2, Operand(external_caught)); |
| 1886 | __ str(r0, MemOperand(r2)); |
| 1887 | |
| 1888 | // Set pending exception and r0 to out of memory exception. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 1889 | Label already_have_failure; |
| 1890 | JumpIfOOM(masm, r0, ip, &already_have_failure); |
| 1891 | Failure* out_of_memory = Failure::OutOfMemoryException(0x1); |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 1892 | __ mov(r0, Operand(reinterpret_cast<int32_t>(out_of_memory))); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 1893 | __ bind(&already_have_failure); |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 1894 | __ mov(r2, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| 1895 | isolate))); |
| 1896 | __ str(r0, MemOperand(r2)); |
| 1897 | // Fall through to the next label. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1898 | |
| 1899 | __ bind(&throw_termination_exception); |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 1900 | __ ThrowUncatchable(r0); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1901 | |
| 1902 | __ bind(&throw_normal_exception); |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 1903 | __ Throw(r0); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1904 | } |
| 1905 | |
| 1906 | |
| 1907 | void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) { |
| 1908 | // r0: code entry |
| 1909 | // r1: function |
| 1910 | // r2: receiver |
| 1911 | // r3: argc |
| 1912 | // [sp+0]: argv |
| 1913 | |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 1914 | Label invoke, handler_entry, exit; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1915 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 1916 | ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| 1917 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1918 | // Called from C, so do not pop argc and args on exit (preserve sp) |
| 1919 | // No need to save register-passed args |
| 1920 | // Save callee-saved registers (incl. cp and fp), sp, and lr |
| 1921 | __ stm(db_w, sp, kCalleeSaved | lr.bit()); |
| 1922 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1923 | // Save callee-saved vfp registers. |
| 1924 | __ vstm(db_w, sp, kFirstCalleeSavedDoubleReg, kLastCalleeSavedDoubleReg); |
| 1925 | // Set up the reserved register for 0.0. |
| 1926 | __ vmov(kDoubleRegZero, 0.0); |
| 1927 | __ VFPEnsureFPSCRState(r4); |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 1928 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1929 | // Get address of argv, see stm above. |
| 1930 | // r0: code entry |
| 1931 | // r1: function |
| 1932 | // r2: receiver |
| 1933 | // r3: argc |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 1934 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1935 | // Set up argv in r4. |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 1936 | int offset_to_argv = (kNumCalleeSaved + 1) * kPointerSize; |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 1937 | offset_to_argv += kNumDoubleCalleeSaved * kDoubleSize; |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 1938 | __ ldr(r4, MemOperand(sp, offset_to_argv)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1939 | |
| 1940 | // Push a frame with special values setup to mark it as an entry frame. |
| 1941 | // r0: code entry |
| 1942 | // r1: function |
| 1943 | // r2: receiver |
| 1944 | // r3: argc |
| 1945 | // r4: argv |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1946 | Isolate* isolate = masm->isolate(); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1947 | int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 1948 | __ mov(r8, Operand(Smi::FromInt(marker))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1949 | __ mov(r6, Operand(Smi::FromInt(marker))); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1950 | __ mov(r5, |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 1951 | Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1952 | __ ldr(r5, MemOperand(r5)); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 1953 | __ mov(ip, Operand(-1)); // Push a bad frame pointer to fail if it is used. |
| 1954 | __ Push(ip, r8, r6, r5); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1955 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1956 | // Set up frame pointer for the frame to be pushed. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1957 | __ add(fp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); |
| 1958 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1959 | // If this is the outermost JS call, set js_entry_sp value. |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 1960 | Label non_outermost_js; |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 1961 | ExternalReference js_entry_sp(Isolate::kJSEntrySPAddress, isolate); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1962 | __ mov(r5, Operand(ExternalReference(js_entry_sp))); |
| 1963 | __ ldr(r6, MemOperand(r5)); |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 1964 | __ cmp(r6, Operand::Zero()); |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 1965 | __ b(ne, &non_outermost_js); |
| 1966 | __ str(fp, MemOperand(r5)); |
| 1967 | __ mov(ip, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
| 1968 | Label cont; |
| 1969 | __ b(&cont); |
| 1970 | __ bind(&non_outermost_js); |
| 1971 | __ mov(ip, Operand(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME))); |
| 1972 | __ bind(&cont); |
| 1973 | __ push(ip); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1974 | |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 1975 | // Jump to a faked try block that does the invoke, with a faked catch |
| 1976 | // block that sets the pending exception. |
| 1977 | __ jmp(&invoke); |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 1978 | |
| 1979 | // Block literal pool emission whilst taking the position of the handler |
| 1980 | // entry. This avoids making the assumption that literal pools are always |
| 1981 | // emitted after an instruction is emitted, rather than before. |
| 1982 | { |
| 1983 | Assembler::BlockConstPoolScope block_const_pool(masm); |
| 1984 | __ bind(&handler_entry); |
| 1985 | handler_offset_ = handler_entry.pos(); |
| 1986 | // Caught exception: Store result (exception) in the pending exception |
| 1987 | // field in the JSEnv and return a failure sentinel. Coming in here the |
| 1988 | // fp will be invalid because the PushTryHandler below sets it to 0 to |
| 1989 | // signal the existence of the JSEntry frame. |
| 1990 | __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| 1991 | isolate))); |
| 1992 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1993 | __ str(r0, MemOperand(ip)); |
| 1994 | __ mov(r0, Operand(reinterpret_cast<int32_t>(Failure::Exception()))); |
| 1995 | __ b(&exit); |
| 1996 | |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 1997 | // Invoke: Link this frame into the handler chain. There's only one |
| 1998 | // handler block in this code object, so its index is 0. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1999 | __ bind(&invoke); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2000 | // Must preserve r0-r4, r5-r6 are available. |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 2001 | __ PushTryHandler(StackHandler::JS_ENTRY, 0); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2002 | // If an exception not caught by another handler occurs, this handler |
| 2003 | // returns control to the code after the bl(&invoke) above, which |
| 2004 | // restores all kCalleeSaved registers (including cp and fp) to their |
| 2005 | // saved values before returning a failure to C. |
| 2006 | |
| 2007 | // Clear any pending exceptions. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2008 | __ mov(r5, Operand(isolate->factory()->the_hole_value())); |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2009 | __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2010 | isolate))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2011 | __ str(r5, MemOperand(ip)); |
| 2012 | |
| 2013 | // Invoke the function by calling through JS entry trampoline builtin. |
| 2014 | // Notice that we cannot store a reference to the trampoline code directly in |
| 2015 | // this stub, because runtime stubs are not traversed when doing GC. |
| 2016 | |
| 2017 | // Expected registers by Builtins::JSEntryTrampoline |
| 2018 | // r0: code entry |
| 2019 | // r1: function |
| 2020 | // r2: receiver |
| 2021 | // r3: argc |
| 2022 | // r4: argv |
| 2023 | if (is_construct) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 2024 | ExternalReference construct_entry(Builtins::kJSConstructEntryTrampoline, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2025 | isolate); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2026 | __ mov(ip, Operand(construct_entry)); |
| 2027 | } else { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 2028 | ExternalReference entry(Builtins::kJSEntryTrampoline, isolate); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2029 | __ mov(ip, Operand(entry)); |
| 2030 | } |
| 2031 | __ ldr(ip, MemOperand(ip)); // deref address |
| 2032 | |
| 2033 | // Branch and link to JSEntryTrampoline. We don't use the double underscore |
| 2034 | // macro for the add instruction because we don't want the coverage tool |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 2035 | // inserting instructions here after we read the pc. We block literal pool |
| 2036 | // emission for the same reason. |
| 2037 | { |
| 2038 | Assembler::BlockConstPoolScope block_const_pool(masm); |
| 2039 | __ mov(lr, Operand(pc)); |
| 2040 | masm->add(pc, ip, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 2041 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2042 | |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 2043 | // Unlink this frame from the handler chain. |
| 2044 | __ PopTryHandler(); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2045 | |
| 2046 | __ bind(&exit); // r0 holds result |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 2047 | // Check if the current stack frame is marked as the outermost JS frame. |
| 2048 | Label non_outermost_js_2; |
| 2049 | __ pop(r5); |
| 2050 | __ cmp(r5, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
| 2051 | __ b(ne, &non_outermost_js_2); |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 2052 | __ mov(r6, Operand::Zero()); |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 2053 | __ mov(r5, Operand(ExternalReference(js_entry_sp))); |
| 2054 | __ str(r6, MemOperand(r5)); |
| 2055 | __ bind(&non_outermost_js_2); |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 2056 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2057 | // Restore the top frame descriptors from the stack. |
| 2058 | __ pop(r3); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2059 | __ mov(ip, |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2060 | Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2061 | __ str(r3, MemOperand(ip)); |
| 2062 | |
| 2063 | // Reset the stack to the callee saved registers. |
| 2064 | __ add(sp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); |
| 2065 | |
| 2066 | // Restore callee-saved registers and return. |
| 2067 | #ifdef DEBUG |
| 2068 | if (FLAG_debug_code) { |
| 2069 | __ mov(lr, Operand(pc)); |
| 2070 | } |
| 2071 | #endif |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 2072 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 2073 | // Restore callee-saved vfp registers. |
| 2074 | __ vldm(ia_w, sp, kFirstCalleeSavedDoubleReg, kLastCalleeSavedDoubleReg); |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 2075 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2076 | __ ldm(ia_w, sp, kCalleeSaved | pc.bit()); |
| 2077 | } |
| 2078 | |
| 2079 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2080 | // Uses registers r0 to r4. |
| 2081 | // Expected input (depending on whether args are in registers or on the stack): |
| 2082 | // * object: r0 or at sp + 1 * kPointerSize. |
| 2083 | // * function: r1 or at sp. |
| 2084 | // |
| 2085 | // An inlined call site may have been generated before calling this stub. |
| 2086 | // In this case the offset to the inline site to patch is passed on the stack, |
| 2087 | // in the safepoint slot for register r4. |
| 2088 | // (See LCodeGen::DoInstanceOfKnownGlobal) |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2089 | void InstanceofStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2090 | // Call site inlining and patching implies arguments in registers. |
| 2091 | ASSERT(HasArgsInRegisters() || !HasCallSiteInlineCheck()); |
| 2092 | // ReturnTrueFalse is only implemented for inlined call sites. |
| 2093 | ASSERT(!ReturnTrueFalseObject() || HasCallSiteInlineCheck()); |
| 2094 | |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2095 | // Fixed register usage throughout the stub: |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 2096 | const Register object = r0; // Object (lhs). |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2097 | Register map = r3; // Map of the object. |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 2098 | const Register function = r1; // Function (rhs). |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2099 | const Register prototype = r4; // Prototype of the function. |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2100 | const Register inline_site = r9; |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2101 | const Register scratch = r2; |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2102 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 2103 | const int32_t kDeltaToLoadBoolResult = 4 * kPointerSize; |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2104 | |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2105 | Label slow, loop, is_instance, is_not_instance, not_js_object; |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2106 | |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 2107 | if (!HasArgsInRegisters()) { |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 2108 | __ ldr(object, MemOperand(sp, 1 * kPointerSize)); |
| 2109 | __ ldr(function, MemOperand(sp, 0)); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2110 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2111 | |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2112 | // Check that the left hand is a JS object and load map. |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 2113 | __ JumpIfSmi(object, ¬_js_object); |
fschneider@chromium.org | 9e3e0b6 | 2011-01-03 10:16:46 +0000 | [diff] [blame] | 2114 | __ IsObjectJSObjectType(object, map, scratch, ¬_js_object); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2115 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2116 | // If there is a call site cache don't look in the global cache, but do the |
| 2117 | // real lookup and update the call site cache. |
| 2118 | if (!HasCallSiteInlineCheck()) { |
| 2119 | Label miss; |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 2120 | __ CompareRoot(function, Heap::kInstanceofCacheFunctionRootIndex); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2121 | __ b(ne, &miss); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 2122 | __ CompareRoot(map, Heap::kInstanceofCacheMapRootIndex); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2123 | __ b(ne, &miss); |
| 2124 | __ LoadRoot(r0, Heap::kInstanceofCacheAnswerRootIndex); |
| 2125 | __ Ret(HasArgsInRegisters() ? 0 : 2); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2126 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2127 | __ bind(&miss); |
| 2128 | } |
| 2129 | |
| 2130 | // Get the prototype of the function. |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 2131 | __ TryGetFunctionPrototype(function, prototype, scratch, &slow, true); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2132 | |
| 2133 | // Check that the function prototype is a JS object. |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 2134 | __ JumpIfSmi(prototype, &slow); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2135 | __ IsObjectJSObjectType(prototype, scratch, scratch, &slow); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2136 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2137 | // Update the global instanceof or call site inlined cache with the current |
| 2138 | // map and function. The cached answer will be set when it is known below. |
| 2139 | if (!HasCallSiteInlineCheck()) { |
| 2140 | __ StoreRoot(function, Heap::kInstanceofCacheFunctionRootIndex); |
| 2141 | __ StoreRoot(map, Heap::kInstanceofCacheMapRootIndex); |
| 2142 | } else { |
| 2143 | ASSERT(HasArgsInRegisters()); |
| 2144 | // Patch the (relocated) inlined map check. |
| 2145 | |
| 2146 | // The offset was stored in r4 safepoint slot. |
| 2147 | // (See LCodeGen::DoDeferredLInstanceOfKnownGlobal) |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2148 | __ LoadFromSafepointRegisterSlot(scratch, r4); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2149 | __ sub(inline_site, lr, scratch); |
| 2150 | // Get the map location in scratch and patch it. |
| 2151 | __ GetRelocatedValueLocation(inline_site, scratch); |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 2152 | __ ldr(scratch, MemOperand(scratch)); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 2153 | __ str(map, FieldMemOperand(scratch, Cell::kValueOffset)); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2154 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2155 | |
| 2156 | // Register mapping: r3 is object map and r4 is function prototype. |
| 2157 | // Get prototype of object into r2. |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2158 | __ ldr(scratch, FieldMemOperand(map, Map::kPrototypeOffset)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2159 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2160 | // We don't need map any more. Use it as a scratch register. |
| 2161 | Register scratch2 = map; |
| 2162 | map = no_reg; |
| 2163 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2164 | // Loop through the prototype chain looking for the function prototype. |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2165 | __ LoadRoot(scratch2, Heap::kNullValueRootIndex); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2166 | __ bind(&loop); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2167 | __ cmp(scratch, Operand(prototype)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2168 | __ b(eq, &is_instance); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2169 | __ cmp(scratch, scratch2); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2170 | __ b(eq, &is_not_instance); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2171 | __ ldr(scratch, FieldMemOperand(scratch, HeapObject::kMapOffset)); |
| 2172 | __ ldr(scratch, FieldMemOperand(scratch, Map::kPrototypeOffset)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2173 | __ jmp(&loop); |
| 2174 | |
| 2175 | __ bind(&is_instance); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2176 | if (!HasCallSiteInlineCheck()) { |
| 2177 | __ mov(r0, Operand(Smi::FromInt(0))); |
| 2178 | __ StoreRoot(r0, Heap::kInstanceofCacheAnswerRootIndex); |
| 2179 | } else { |
| 2180 | // Patch the call site to return true. |
| 2181 | __ LoadRoot(r0, Heap::kTrueValueRootIndex); |
| 2182 | __ add(inline_site, inline_site, Operand(kDeltaToLoadBoolResult)); |
| 2183 | // Get the boolean result location in scratch and patch it. |
| 2184 | __ GetRelocatedValueLocation(inline_site, scratch); |
| 2185 | __ str(r0, MemOperand(scratch)); |
| 2186 | |
| 2187 | if (!ReturnTrueFalseObject()) { |
| 2188 | __ mov(r0, Operand(Smi::FromInt(0))); |
| 2189 | } |
| 2190 | } |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 2191 | __ Ret(HasArgsInRegisters() ? 0 : 2); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2192 | |
| 2193 | __ bind(&is_not_instance); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2194 | if (!HasCallSiteInlineCheck()) { |
| 2195 | __ mov(r0, Operand(Smi::FromInt(1))); |
| 2196 | __ StoreRoot(r0, Heap::kInstanceofCacheAnswerRootIndex); |
| 2197 | } else { |
| 2198 | // Patch the call site to return false. |
| 2199 | __ LoadRoot(r0, Heap::kFalseValueRootIndex); |
| 2200 | __ add(inline_site, inline_site, Operand(kDeltaToLoadBoolResult)); |
| 2201 | // Get the boolean result location in scratch and patch it. |
| 2202 | __ GetRelocatedValueLocation(inline_site, scratch); |
| 2203 | __ str(r0, MemOperand(scratch)); |
| 2204 | |
| 2205 | if (!ReturnTrueFalseObject()) { |
| 2206 | __ mov(r0, Operand(Smi::FromInt(1))); |
| 2207 | } |
| 2208 | } |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 2209 | __ Ret(HasArgsInRegisters() ? 0 : 2); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2210 | |
| 2211 | Label object_not_null, object_not_null_or_smi; |
| 2212 | __ bind(¬_js_object); |
| 2213 | // Before null, smi and string value checks, check that the rhs is a function |
| 2214 | // as for a non-function rhs an exception needs to be thrown. |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 2215 | __ JumpIfSmi(function, &slow); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2216 | __ CompareObjectType(function, scratch2, scratch, JS_FUNCTION_TYPE); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2217 | __ b(ne, &slow); |
| 2218 | |
| 2219 | // Null is not instance of anything. |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 2220 | __ cmp(scratch, Operand(masm->isolate()->factory()->null_value())); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2221 | __ b(ne, &object_not_null); |
| 2222 | __ mov(r0, Operand(Smi::FromInt(1))); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 2223 | __ Ret(HasArgsInRegisters() ? 0 : 2); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2224 | |
| 2225 | __ bind(&object_not_null); |
| 2226 | // Smi values are not instances of anything. |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 2227 | __ JumpIfNotSmi(object, &object_not_null_or_smi); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2228 | __ mov(r0, Operand(Smi::FromInt(1))); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 2229 | __ Ret(HasArgsInRegisters() ? 0 : 2); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2230 | |
| 2231 | __ bind(&object_not_null_or_smi); |
| 2232 | // String values are not instances of anything. |
| 2233 | __ IsObjectJSStringType(object, scratch, &slow); |
| 2234 | __ mov(r0, Operand(Smi::FromInt(1))); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 2235 | __ Ret(HasArgsInRegisters() ? 0 : 2); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2236 | |
| 2237 | // Slow-case. Tail call builtin. |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 2238 | __ bind(&slow); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2239 | if (!ReturnTrueFalseObject()) { |
| 2240 | if (HasArgsInRegisters()) { |
| 2241 | __ Push(r0, r1); |
| 2242 | } |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2243 | __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2244 | } else { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2245 | { |
| 2246 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 2247 | __ Push(r0, r1); |
| 2248 | __ InvokeBuiltin(Builtins::INSTANCE_OF, CALL_FUNCTION); |
| 2249 | } |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 2250 | __ cmp(r0, Operand::Zero()); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2251 | __ LoadRoot(r0, Heap::kTrueValueRootIndex, eq); |
| 2252 | __ LoadRoot(r0, Heap::kFalseValueRootIndex, ne); |
| 2253 | __ Ret(HasArgsInRegisters() ? 0 : 2); |
| 2254 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2255 | } |
| 2256 | |
| 2257 | |
mvstanton@chromium.org | 6bec009 | 2013-01-23 13:46:53 +0000 | [diff] [blame] | 2258 | void FunctionPrototypeStub::Generate(MacroAssembler* masm) { |
| 2259 | Label miss; |
| 2260 | Register receiver; |
| 2261 | if (kind() == Code::KEYED_LOAD_IC) { |
| 2262 | // ----------- S t a t e ------------- |
| 2263 | // -- lr : return address |
| 2264 | // -- r0 : key |
| 2265 | // -- r1 : receiver |
| 2266 | // ----------------------------------- |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 2267 | __ cmp(r0, Operand(masm->isolate()->factory()->prototype_string())); |
mvstanton@chromium.org | 6bec009 | 2013-01-23 13:46:53 +0000 | [diff] [blame] | 2268 | __ b(ne, &miss); |
| 2269 | receiver = r1; |
| 2270 | } else { |
| 2271 | ASSERT(kind() == Code::LOAD_IC); |
| 2272 | // ----------- S t a t e ------------- |
| 2273 | // -- r2 : name |
| 2274 | // -- lr : return address |
| 2275 | // -- r0 : receiver |
| 2276 | // -- sp[0] : receiver |
| 2277 | // ----------------------------------- |
| 2278 | receiver = r0; |
| 2279 | } |
| 2280 | |
| 2281 | StubCompiler::GenerateLoadFunctionPrototype(masm, receiver, r3, r4, &miss); |
| 2282 | __ bind(&miss); |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 2283 | StubCompiler::TailCallBuiltin( |
| 2284 | masm, BaseLoadStoreStubCompiler::MissBuiltin(kind())); |
mvstanton@chromium.org | 6bec009 | 2013-01-23 13:46:53 +0000 | [diff] [blame] | 2285 | } |
| 2286 | |
| 2287 | |
| 2288 | void StringLengthStub::Generate(MacroAssembler* masm) { |
| 2289 | Label miss; |
| 2290 | Register receiver; |
| 2291 | if (kind() == Code::KEYED_LOAD_IC) { |
| 2292 | // ----------- S t a t e ------------- |
| 2293 | // -- lr : return address |
| 2294 | // -- r0 : key |
| 2295 | // -- r1 : receiver |
| 2296 | // ----------------------------------- |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 2297 | __ cmp(r0, Operand(masm->isolate()->factory()->length_string())); |
mvstanton@chromium.org | 6bec009 | 2013-01-23 13:46:53 +0000 | [diff] [blame] | 2298 | __ b(ne, &miss); |
| 2299 | receiver = r1; |
| 2300 | } else { |
| 2301 | ASSERT(kind() == Code::LOAD_IC); |
| 2302 | // ----------- S t a t e ------------- |
| 2303 | // -- r2 : name |
| 2304 | // -- lr : return address |
| 2305 | // -- r0 : receiver |
| 2306 | // -- sp[0] : receiver |
| 2307 | // ----------------------------------- |
| 2308 | receiver = r0; |
| 2309 | } |
| 2310 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 2311 | StubCompiler::GenerateLoadStringLength(masm, receiver, r3, r4, &miss); |
mvstanton@chromium.org | 6bec009 | 2013-01-23 13:46:53 +0000 | [diff] [blame] | 2312 | |
| 2313 | __ bind(&miss); |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 2314 | StubCompiler::TailCallBuiltin( |
| 2315 | masm, BaseLoadStoreStubCompiler::MissBuiltin(kind())); |
mvstanton@chromium.org | 6bec009 | 2013-01-23 13:46:53 +0000 | [diff] [blame] | 2316 | } |
| 2317 | |
| 2318 | |
mvstanton@chromium.org | d16d853 | 2013-01-25 13:29:10 +0000 | [diff] [blame] | 2319 | void StoreArrayLengthStub::Generate(MacroAssembler* masm) { |
| 2320 | // This accepts as a receiver anything JSArray::SetElementsLength accepts |
| 2321 | // (currently anything except for external arrays which means anything with |
| 2322 | // elements of FixedArray type). Value must be a number, but only smis are |
| 2323 | // accepted as the most common case. |
| 2324 | Label miss; |
| 2325 | |
| 2326 | Register receiver; |
| 2327 | Register value; |
| 2328 | if (kind() == Code::KEYED_STORE_IC) { |
| 2329 | // ----------- S t a t e ------------- |
| 2330 | // -- lr : return address |
| 2331 | // -- r0 : value |
| 2332 | // -- r1 : key |
| 2333 | // -- r2 : receiver |
| 2334 | // ----------------------------------- |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 2335 | __ cmp(r1, Operand(masm->isolate()->factory()->length_string())); |
mvstanton@chromium.org | d16d853 | 2013-01-25 13:29:10 +0000 | [diff] [blame] | 2336 | __ b(ne, &miss); |
| 2337 | receiver = r2; |
| 2338 | value = r0; |
| 2339 | } else { |
| 2340 | ASSERT(kind() == Code::STORE_IC); |
| 2341 | // ----------- S t a t e ------------- |
| 2342 | // -- lr : return address |
| 2343 | // -- r0 : value |
| 2344 | // -- r1 : receiver |
| 2345 | // -- r2 : key |
| 2346 | // ----------------------------------- |
| 2347 | receiver = r1; |
| 2348 | value = r0; |
| 2349 | } |
| 2350 | Register scratch = r3; |
| 2351 | |
| 2352 | // Check that the receiver isn't a smi. |
| 2353 | __ JumpIfSmi(receiver, &miss); |
| 2354 | |
| 2355 | // Check that the object is a JS array. |
| 2356 | __ CompareObjectType(receiver, scratch, scratch, JS_ARRAY_TYPE); |
| 2357 | __ b(ne, &miss); |
| 2358 | |
| 2359 | // Check that elements are FixedArray. |
| 2360 | // We rely on StoreIC_ArrayLength below to deal with all types of |
| 2361 | // fast elements (including COW). |
| 2362 | __ ldr(scratch, FieldMemOperand(receiver, JSArray::kElementsOffset)); |
| 2363 | __ CompareObjectType(scratch, scratch, scratch, FIXED_ARRAY_TYPE); |
| 2364 | __ b(ne, &miss); |
| 2365 | |
| 2366 | // Check that the array has fast properties, otherwise the length |
| 2367 | // property might have been redefined. |
| 2368 | __ ldr(scratch, FieldMemOperand(receiver, JSArray::kPropertiesOffset)); |
| 2369 | __ ldr(scratch, FieldMemOperand(scratch, FixedArray::kMapOffset)); |
| 2370 | __ CompareRoot(scratch, Heap::kHashTableMapRootIndex); |
| 2371 | __ b(eq, &miss); |
| 2372 | |
| 2373 | // Check that value is a smi. |
| 2374 | __ JumpIfNotSmi(value, &miss); |
| 2375 | |
| 2376 | // Prepare tail call to StoreIC_ArrayLength. |
| 2377 | __ Push(receiver, value); |
| 2378 | |
| 2379 | ExternalReference ref = |
| 2380 | ExternalReference(IC_Utility(IC::kStoreIC_ArrayLength), masm->isolate()); |
| 2381 | __ TailCallExternalReference(ref, 2, 1); |
| 2382 | |
| 2383 | __ bind(&miss); |
| 2384 | |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 2385 | StubCompiler::TailCallBuiltin( |
| 2386 | masm, BaseLoadStoreStubCompiler::MissBuiltin(kind())); |
mvstanton@chromium.org | d16d853 | 2013-01-25 13:29:10 +0000 | [diff] [blame] | 2387 | } |
| 2388 | |
| 2389 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2390 | Register InstanceofStub::left() { return r0; } |
| 2391 | |
| 2392 | |
| 2393 | Register InstanceofStub::right() { return r1; } |
| 2394 | |
| 2395 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2396 | void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) { |
| 2397 | // The displacement is the offset of the last parameter (if any) |
| 2398 | // relative to the frame pointer. |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 2399 | const int kDisplacement = |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2400 | StandardFrameConstants::kCallerSPOffset - kPointerSize; |
| 2401 | |
| 2402 | // Check that the key is a smi. |
| 2403 | Label slow; |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 2404 | __ JumpIfNotSmi(r1, &slow); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2405 | |
| 2406 | // Check if the calling frame is an arguments adaptor frame. |
| 2407 | Label adaptor; |
| 2408 | __ ldr(r2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 2409 | __ ldr(r3, MemOperand(r2, StandardFrameConstants::kContextOffset)); |
| 2410 | __ cmp(r3, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 2411 | __ b(eq, &adaptor); |
| 2412 | |
| 2413 | // Check index against formal parameters count limit passed in |
| 2414 | // through register r0. Use unsigned comparison to get negative |
| 2415 | // check for free. |
| 2416 | __ cmp(r1, r0); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 2417 | __ b(hs, &slow); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2418 | |
| 2419 | // Read the argument from the stack and return it. |
| 2420 | __ sub(r3, r0, r1); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 2421 | __ add(r3, fp, Operand::PointerOffsetFromSmiKey(r3)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2422 | __ ldr(r0, MemOperand(r3, kDisplacement)); |
| 2423 | __ Jump(lr); |
| 2424 | |
| 2425 | // Arguments adaptor case: Check index against actual arguments |
| 2426 | // limit found in the arguments adaptor frame. Use unsigned |
| 2427 | // comparison to get negative check for free. |
| 2428 | __ bind(&adaptor); |
| 2429 | __ ldr(r0, MemOperand(r2, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 2430 | __ cmp(r1, r0); |
| 2431 | __ b(cs, &slow); |
| 2432 | |
| 2433 | // Read the argument from the adaptor frame and return it. |
| 2434 | __ sub(r3, r0, r1); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 2435 | __ add(r3, r2, Operand::PointerOffsetFromSmiKey(r3)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2436 | __ ldr(r0, MemOperand(r3, kDisplacement)); |
| 2437 | __ Jump(lr); |
| 2438 | |
| 2439 | // Slow-case: Handle non-smi or out-of-bounds access to arguments |
| 2440 | // by calling the runtime system. |
| 2441 | __ bind(&slow); |
| 2442 | __ push(r1); |
| 2443 | __ TailCallRuntime(Runtime::kGetArgumentsProperty, 1, 1); |
| 2444 | } |
| 2445 | |
| 2446 | |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2447 | void ArgumentsAccessStub::GenerateNewNonStrictSlow(MacroAssembler* masm) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2448 | // sp[0] : number of parameters |
| 2449 | // sp[4] : receiver displacement |
| 2450 | // sp[8] : function |
| 2451 | |
| 2452 | // Check if the calling frame is an arguments adaptor frame. |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2453 | Label runtime; |
| 2454 | __ ldr(r3, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 2455 | __ ldr(r2, MemOperand(r3, StandardFrameConstants::kContextOffset)); |
| 2456 | __ cmp(r2, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 2457 | __ b(ne, &runtime); |
| 2458 | |
| 2459 | // Patch the arguments.length and the parameters pointer in the current frame. |
| 2460 | __ ldr(r2, MemOperand(r3, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 2461 | __ str(r2, MemOperand(sp, 0 * kPointerSize)); |
| 2462 | __ add(r3, r3, Operand(r2, LSL, 1)); |
| 2463 | __ add(r3, r3, Operand(StandardFrameConstants::kCallerSPOffset)); |
| 2464 | __ str(r3, MemOperand(sp, 1 * kPointerSize)); |
| 2465 | |
| 2466 | __ bind(&runtime); |
| 2467 | __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); |
| 2468 | } |
| 2469 | |
| 2470 | |
| 2471 | void ArgumentsAccessStub::GenerateNewNonStrictFast(MacroAssembler* masm) { |
| 2472 | // Stack layout: |
| 2473 | // sp[0] : number of parameters (tagged) |
| 2474 | // sp[4] : address of receiver argument |
| 2475 | // sp[8] : function |
| 2476 | // Registers used over whole function: |
| 2477 | // r6 : allocated object (tagged) |
| 2478 | // r9 : mapped parameter count (tagged) |
| 2479 | |
| 2480 | __ ldr(r1, MemOperand(sp, 0 * kPointerSize)); |
| 2481 | // r1 = parameter count (tagged) |
| 2482 | |
| 2483 | // Check if the calling frame is an arguments adaptor frame. |
| 2484 | Label runtime; |
| 2485 | Label adaptor_frame, try_allocate; |
| 2486 | __ ldr(r3, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 2487 | __ ldr(r2, MemOperand(r3, StandardFrameConstants::kContextOffset)); |
| 2488 | __ cmp(r2, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 2489 | __ b(eq, &adaptor_frame); |
| 2490 | |
| 2491 | // No adaptor, parameter count = argument count. |
| 2492 | __ mov(r2, r1); |
| 2493 | __ b(&try_allocate); |
| 2494 | |
| 2495 | // We have an adaptor frame. Patch the parameters pointer. |
| 2496 | __ bind(&adaptor_frame); |
| 2497 | __ ldr(r2, MemOperand(r3, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 2498 | __ add(r3, r3, Operand(r2, LSL, 1)); |
| 2499 | __ add(r3, r3, Operand(StandardFrameConstants::kCallerSPOffset)); |
| 2500 | __ str(r3, MemOperand(sp, 1 * kPointerSize)); |
| 2501 | |
| 2502 | // r1 = parameter count (tagged) |
| 2503 | // r2 = argument count (tagged) |
| 2504 | // Compute the mapped parameter count = min(r1, r2) in r1. |
| 2505 | __ cmp(r1, Operand(r2)); |
| 2506 | __ mov(r1, Operand(r2), LeaveCC, gt); |
| 2507 | |
| 2508 | __ bind(&try_allocate); |
| 2509 | |
| 2510 | // Compute the sizes of backing store, parameter map, and arguments object. |
| 2511 | // 1. Parameter map, has 2 extra words containing context and backing store. |
| 2512 | const int kParameterMapHeaderSize = |
| 2513 | FixedArray::kHeaderSize + 2 * kPointerSize; |
| 2514 | // If there are no mapped parameters, we do not need the parameter_map. |
| 2515 | __ cmp(r1, Operand(Smi::FromInt(0))); |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 2516 | __ mov(r9, Operand::Zero(), LeaveCC, eq); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2517 | __ mov(r9, Operand(r1, LSL, 1), LeaveCC, ne); |
| 2518 | __ add(r9, r9, Operand(kParameterMapHeaderSize), LeaveCC, ne); |
| 2519 | |
| 2520 | // 2. Backing store. |
| 2521 | __ add(r9, r9, Operand(r2, LSL, 1)); |
| 2522 | __ add(r9, r9, Operand(FixedArray::kHeaderSize)); |
| 2523 | |
| 2524 | // 3. Arguments object. |
| 2525 | __ add(r9, r9, Operand(Heap::kArgumentsObjectSize)); |
| 2526 | |
| 2527 | // Do the allocation of all three objects in one go. |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 2528 | __ Allocate(r9, r0, r3, r4, &runtime, TAG_OBJECT); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2529 | |
| 2530 | // r0 = address of new object(s) (tagged) |
| 2531 | // r2 = argument count (tagged) |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 2532 | // Get the arguments boilerplate from the current native context into r4. |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2533 | const int kNormalOffset = |
| 2534 | Context::SlotOffset(Context::ARGUMENTS_BOILERPLATE_INDEX); |
| 2535 | const int kAliasedOffset = |
| 2536 | Context::SlotOffset(Context::ALIASED_ARGUMENTS_BOILERPLATE_INDEX); |
| 2537 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 2538 | __ ldr(r4, MemOperand(r8, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| 2539 | __ ldr(r4, FieldMemOperand(r4, GlobalObject::kNativeContextOffset)); |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 2540 | __ cmp(r1, Operand::Zero()); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2541 | __ ldr(r4, MemOperand(r4, kNormalOffset), eq); |
| 2542 | __ ldr(r4, MemOperand(r4, kAliasedOffset), ne); |
| 2543 | |
| 2544 | // r0 = address of new object (tagged) |
| 2545 | // r1 = mapped parameter count (tagged) |
| 2546 | // r2 = argument count (tagged) |
| 2547 | // r4 = address of boilerplate object (tagged) |
| 2548 | // Copy the JS object part. |
| 2549 | for (int i = 0; i < JSObject::kHeaderSize; i += kPointerSize) { |
| 2550 | __ ldr(r3, FieldMemOperand(r4, i)); |
| 2551 | __ str(r3, FieldMemOperand(r0, i)); |
| 2552 | } |
| 2553 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 2554 | // Set up the callee in-object property. |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2555 | STATIC_ASSERT(Heap::kArgumentsCalleeIndex == 1); |
| 2556 | __ ldr(r3, MemOperand(sp, 2 * kPointerSize)); |
| 2557 | const int kCalleeOffset = JSObject::kHeaderSize + |
| 2558 | Heap::kArgumentsCalleeIndex * kPointerSize; |
| 2559 | __ str(r3, FieldMemOperand(r0, kCalleeOffset)); |
| 2560 | |
| 2561 | // Use the length (smi tagged) and set that as an in-object property too. |
| 2562 | STATIC_ASSERT(Heap::kArgumentsLengthIndex == 0); |
| 2563 | const int kLengthOffset = JSObject::kHeaderSize + |
| 2564 | Heap::kArgumentsLengthIndex * kPointerSize; |
| 2565 | __ str(r2, FieldMemOperand(r0, kLengthOffset)); |
| 2566 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 2567 | // Set up the elements pointer in the allocated arguments object. |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2568 | // If we allocated a parameter map, r4 will point there, otherwise |
| 2569 | // it will point to the backing store. |
| 2570 | __ add(r4, r0, Operand(Heap::kArgumentsObjectSize)); |
| 2571 | __ str(r4, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| 2572 | |
| 2573 | // r0 = address of new object (tagged) |
| 2574 | // r1 = mapped parameter count (tagged) |
| 2575 | // r2 = argument count (tagged) |
| 2576 | // r4 = address of parameter map or backing store (tagged) |
| 2577 | // Initialize parameter map. If there are no mapped arguments, we're done. |
| 2578 | Label skip_parameter_map; |
| 2579 | __ cmp(r1, Operand(Smi::FromInt(0))); |
| 2580 | // Move backing store address to r3, because it is |
| 2581 | // expected there when filling in the unmapped arguments. |
| 2582 | __ mov(r3, r4, LeaveCC, eq); |
| 2583 | __ b(eq, &skip_parameter_map); |
| 2584 | |
| 2585 | __ LoadRoot(r6, Heap::kNonStrictArgumentsElementsMapRootIndex); |
| 2586 | __ str(r6, FieldMemOperand(r4, FixedArray::kMapOffset)); |
| 2587 | __ add(r6, r1, Operand(Smi::FromInt(2))); |
| 2588 | __ str(r6, FieldMemOperand(r4, FixedArray::kLengthOffset)); |
| 2589 | __ str(r8, FieldMemOperand(r4, FixedArray::kHeaderSize + 0 * kPointerSize)); |
| 2590 | __ add(r6, r4, Operand(r1, LSL, 1)); |
| 2591 | __ add(r6, r6, Operand(kParameterMapHeaderSize)); |
| 2592 | __ str(r6, FieldMemOperand(r4, FixedArray::kHeaderSize + 1 * kPointerSize)); |
| 2593 | |
| 2594 | // Copy the parameter slots and the holes in the arguments. |
| 2595 | // We need to fill in mapped_parameter_count slots. They index the context, |
| 2596 | // where parameters are stored in reverse order, at |
| 2597 | // MIN_CONTEXT_SLOTS .. MIN_CONTEXT_SLOTS+parameter_count-1 |
| 2598 | // The mapped parameter thus need to get indices |
| 2599 | // MIN_CONTEXT_SLOTS+parameter_count-1 .. |
| 2600 | // MIN_CONTEXT_SLOTS+parameter_count-mapped_parameter_count |
| 2601 | // We loop from right to left. |
| 2602 | Label parameters_loop, parameters_test; |
| 2603 | __ mov(r6, r1); |
| 2604 | __ ldr(r9, MemOperand(sp, 0 * kPointerSize)); |
| 2605 | __ add(r9, r9, Operand(Smi::FromInt(Context::MIN_CONTEXT_SLOTS))); |
| 2606 | __ sub(r9, r9, Operand(r1)); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2607 | __ LoadRoot(r5, Heap::kTheHoleValueRootIndex); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2608 | __ add(r3, r4, Operand(r6, LSL, 1)); |
| 2609 | __ add(r3, r3, Operand(kParameterMapHeaderSize)); |
| 2610 | |
| 2611 | // r6 = loop variable (tagged) |
| 2612 | // r1 = mapping index (tagged) |
| 2613 | // r3 = address of backing store (tagged) |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2614 | // r4 = address of parameter map (tagged), which is also the address of new |
| 2615 | // object + Heap::kArgumentsObjectSize (tagged) |
| 2616 | // r0 = temporary scratch (a.o., for address calculation) |
| 2617 | // r5 = the hole value |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2618 | __ jmp(¶meters_test); |
| 2619 | |
| 2620 | __ bind(¶meters_loop); |
| 2621 | __ sub(r6, r6, Operand(Smi::FromInt(1))); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2622 | __ mov(r0, Operand(r6, LSL, 1)); |
| 2623 | __ add(r0, r0, Operand(kParameterMapHeaderSize - kHeapObjectTag)); |
| 2624 | __ str(r9, MemOperand(r4, r0)); |
| 2625 | __ sub(r0, r0, Operand(kParameterMapHeaderSize - FixedArray::kHeaderSize)); |
| 2626 | __ str(r5, MemOperand(r3, r0)); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2627 | __ add(r9, r9, Operand(Smi::FromInt(1))); |
| 2628 | __ bind(¶meters_test); |
| 2629 | __ cmp(r6, Operand(Smi::FromInt(0))); |
| 2630 | __ b(ne, ¶meters_loop); |
| 2631 | |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2632 | // Restore r0 = new object (tagged) |
| 2633 | __ sub(r0, r4, Operand(Heap::kArgumentsObjectSize)); |
| 2634 | |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2635 | __ bind(&skip_parameter_map); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2636 | // r0 = address of new object (tagged) |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2637 | // r2 = argument count (tagged) |
| 2638 | // r3 = address of backing store (tagged) |
| 2639 | // r5 = scratch |
| 2640 | // Copy arguments header and remaining slots (if there are any). |
| 2641 | __ LoadRoot(r5, Heap::kFixedArrayMapRootIndex); |
| 2642 | __ str(r5, FieldMemOperand(r3, FixedArray::kMapOffset)); |
| 2643 | __ str(r2, FieldMemOperand(r3, FixedArray::kLengthOffset)); |
| 2644 | |
| 2645 | Label arguments_loop, arguments_test; |
| 2646 | __ mov(r9, r1); |
| 2647 | __ ldr(r4, MemOperand(sp, 1 * kPointerSize)); |
| 2648 | __ sub(r4, r4, Operand(r9, LSL, 1)); |
| 2649 | __ jmp(&arguments_test); |
| 2650 | |
| 2651 | __ bind(&arguments_loop); |
| 2652 | __ sub(r4, r4, Operand(kPointerSize)); |
| 2653 | __ ldr(r6, MemOperand(r4, 0)); |
| 2654 | __ add(r5, r3, Operand(r9, LSL, 1)); |
| 2655 | __ str(r6, FieldMemOperand(r5, FixedArray::kHeaderSize)); |
| 2656 | __ add(r9, r9, Operand(Smi::FromInt(1))); |
| 2657 | |
| 2658 | __ bind(&arguments_test); |
| 2659 | __ cmp(r9, Operand(r2)); |
| 2660 | __ b(lt, &arguments_loop); |
| 2661 | |
| 2662 | // Return and remove the on-stack parameters. |
| 2663 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 2664 | __ Ret(); |
| 2665 | |
| 2666 | // Do the runtime call to allocate the arguments object. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2667 | // r0 = address of new object (tagged) |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 2668 | // r2 = argument count (tagged) |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2669 | __ bind(&runtime); |
| 2670 | __ str(r2, MemOperand(sp, 0 * kPointerSize)); // Patch argument count. |
| 2671 | __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); |
| 2672 | } |
| 2673 | |
| 2674 | |
| 2675 | void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) { |
| 2676 | // sp[0] : number of parameters |
| 2677 | // sp[4] : receiver displacement |
| 2678 | // sp[8] : function |
| 2679 | // Check if the calling frame is an arguments adaptor frame. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2680 | Label adaptor_frame, try_allocate, runtime; |
| 2681 | __ ldr(r2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 2682 | __ ldr(r3, MemOperand(r2, StandardFrameConstants::kContextOffset)); |
| 2683 | __ cmp(r3, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 2684 | __ b(eq, &adaptor_frame); |
| 2685 | |
| 2686 | // Get the length from the frame. |
| 2687 | __ ldr(r1, MemOperand(sp, 0)); |
| 2688 | __ b(&try_allocate); |
| 2689 | |
| 2690 | // Patch the arguments.length and the parameters pointer. |
| 2691 | __ bind(&adaptor_frame); |
| 2692 | __ ldr(r1, MemOperand(r2, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 2693 | __ str(r1, MemOperand(sp, 0)); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 2694 | __ add(r3, r2, Operand::PointerOffsetFromSmiKey(r1)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2695 | __ add(r3, r3, Operand(StandardFrameConstants::kCallerSPOffset)); |
| 2696 | __ str(r3, MemOperand(sp, 1 * kPointerSize)); |
| 2697 | |
| 2698 | // Try the new space allocation. Start out with computing the size |
| 2699 | // of the arguments object and the elements array in words. |
| 2700 | Label add_arguments_object; |
| 2701 | __ bind(&try_allocate); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 2702 | __ SmiUntag(r1, SetCC); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2703 | __ b(eq, &add_arguments_object); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2704 | __ add(r1, r1, Operand(FixedArray::kHeaderSize / kPointerSize)); |
| 2705 | __ bind(&add_arguments_object); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2706 | __ add(r1, r1, Operand(Heap::kArgumentsObjectSizeStrict / kPointerSize)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2707 | |
| 2708 | // Do the allocation of both objects in one go. |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 2709 | __ Allocate(r1, r0, r2, r3, &runtime, |
| 2710 | static_cast<AllocationFlags>(TAG_OBJECT | SIZE_IN_WORDS)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2711 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 2712 | // Get the arguments boilerplate from the current native context. |
| 2713 | __ ldr(r4, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| 2714 | __ ldr(r4, FieldMemOperand(r4, GlobalObject::kNativeContextOffset)); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2715 | __ ldr(r4, MemOperand(r4, Context::SlotOffset( |
| 2716 | Context::STRICT_MODE_ARGUMENTS_BOILERPLATE_INDEX))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2717 | |
| 2718 | // Copy the JS object part. |
jkummerow@chromium.org | fb732b1 | 2013-07-26 10:27:09 +0000 | [diff] [blame] | 2719 | __ CopyFields(r0, r4, d0, JSObject::kHeaderSize / kPointerSize); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2720 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2721 | // Get the length (smi tagged) and set that as an in-object property too. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2722 | STATIC_ASSERT(Heap::kArgumentsLengthIndex == 0); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2723 | __ ldr(r1, MemOperand(sp, 0 * kPointerSize)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2724 | __ str(r1, FieldMemOperand(r0, JSObject::kHeaderSize + |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2725 | Heap::kArgumentsLengthIndex * kPointerSize)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2726 | |
| 2727 | // If there are no actual arguments, we're done. |
| 2728 | Label done; |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 2729 | __ cmp(r1, Operand::Zero()); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2730 | __ b(eq, &done); |
| 2731 | |
| 2732 | // Get the parameters pointer from the stack. |
| 2733 | __ ldr(r2, MemOperand(sp, 1 * kPointerSize)); |
| 2734 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 2735 | // Set up the elements pointer in the allocated arguments object and |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2736 | // initialize the header in the elements fixed array. |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2737 | __ add(r4, r0, Operand(Heap::kArgumentsObjectSizeStrict)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2738 | __ str(r4, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| 2739 | __ LoadRoot(r3, Heap::kFixedArrayMapRootIndex); |
| 2740 | __ str(r3, FieldMemOperand(r4, FixedArray::kMapOffset)); |
| 2741 | __ str(r1, FieldMemOperand(r4, FixedArray::kLengthOffset)); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 2742 | __ SmiUntag(r1); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2743 | |
| 2744 | // Copy the fixed array slots. |
| 2745 | Label loop; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 2746 | // Set up r4 to point to the first array slot. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2747 | __ add(r4, r4, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 2748 | __ bind(&loop); |
| 2749 | // Pre-decrement r2 with kPointerSize on each iteration. |
| 2750 | // Pre-decrement in order to skip receiver. |
| 2751 | __ ldr(r3, MemOperand(r2, kPointerSize, NegPreIndex)); |
| 2752 | // Post-increment r4 with kPointerSize on each iteration. |
| 2753 | __ str(r3, MemOperand(r4, kPointerSize, PostIndex)); |
| 2754 | __ sub(r1, r1, Operand(1)); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 2755 | __ cmp(r1, Operand::Zero()); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2756 | __ b(ne, &loop); |
| 2757 | |
| 2758 | // Return and remove the on-stack parameters. |
| 2759 | __ bind(&done); |
| 2760 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 2761 | __ Ret(); |
| 2762 | |
| 2763 | // Do the runtime call to allocate the arguments object. |
| 2764 | __ bind(&runtime); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2765 | __ TailCallRuntime(Runtime::kNewStrictArgumentsFast, 3, 1); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2766 | } |
| 2767 | |
| 2768 | |
| 2769 | void RegExpExecStub::Generate(MacroAssembler* masm) { |
| 2770 | // Just jump directly to runtime if native RegExp is not selected at compile |
| 2771 | // time or if regexp entry in generated code is turned off runtime switch or |
| 2772 | // at compilation. |
| 2773 | #ifdef V8_INTERPRETED_REGEXP |
| 2774 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 2775 | #else // V8_INTERPRETED_REGEXP |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2776 | |
| 2777 | // Stack frame on entry. |
| 2778 | // sp[0]: last_match_info (expected JSArray) |
| 2779 | // sp[4]: previous index |
| 2780 | // sp[8]: subject string |
| 2781 | // sp[12]: JSRegExp object |
| 2782 | |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 2783 | const int kLastMatchInfoOffset = 0 * kPointerSize; |
| 2784 | const int kPreviousIndexOffset = 1 * kPointerSize; |
| 2785 | const int kSubjectOffset = 2 * kPointerSize; |
| 2786 | const int kJSRegExpOffset = 3 * kPointerSize; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2787 | |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2788 | Label runtime; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2789 | // Allocation of registers for this function. These are in callee save |
| 2790 | // registers and will be preserved by the call to the native RegExp code, as |
| 2791 | // this code is called using the normal C calling convention. When calling |
| 2792 | // directly from generated code the native RegExp code will not do a GC and |
| 2793 | // therefore the content of these registers are safe to use after the call. |
| 2794 | Register subject = r4; |
| 2795 | Register regexp_data = r5; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2796 | Register last_match_info_elements = no_reg; // will be r6; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2797 | |
| 2798 | // Ensure that a RegExp stack is allocated. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2799 | Isolate* isolate = masm->isolate(); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2800 | ExternalReference address_of_regexp_stack_memory_address = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2801 | ExternalReference::address_of_regexp_stack_memory_address(isolate); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2802 | ExternalReference address_of_regexp_stack_memory_size = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2803 | ExternalReference::address_of_regexp_stack_memory_size(isolate); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2804 | __ mov(r0, Operand(address_of_regexp_stack_memory_size)); |
| 2805 | __ ldr(r0, MemOperand(r0, 0)); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 2806 | __ cmp(r0, Operand::Zero()); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2807 | __ b(eq, &runtime); |
| 2808 | |
| 2809 | // Check that the first argument is a JSRegExp object. |
| 2810 | __ ldr(r0, MemOperand(sp, kJSRegExpOffset)); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2811 | __ JumpIfSmi(r0, &runtime); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2812 | __ CompareObjectType(r0, r1, r1, JS_REGEXP_TYPE); |
| 2813 | __ b(ne, &runtime); |
| 2814 | |
| 2815 | // Check that the RegExp has been compiled (data contains a fixed array). |
| 2816 | __ ldr(regexp_data, FieldMemOperand(r0, JSRegExp::kDataOffset)); |
| 2817 | if (FLAG_debug_code) { |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 2818 | __ SmiTst(regexp_data); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2819 | __ Check(ne, kUnexpectedTypeForRegExpDataFixedArrayExpected); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2820 | __ CompareObjectType(regexp_data, r0, r0, FIXED_ARRAY_TYPE); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2821 | __ Check(eq, kUnexpectedTypeForRegExpDataFixedArrayExpected); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2822 | } |
| 2823 | |
| 2824 | // regexp_data: RegExp data (FixedArray) |
| 2825 | // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| 2826 | __ ldr(r0, FieldMemOperand(regexp_data, JSRegExp::kDataTagOffset)); |
| 2827 | __ cmp(r0, Operand(Smi::FromInt(JSRegExp::IRREGEXP))); |
| 2828 | __ b(ne, &runtime); |
| 2829 | |
| 2830 | // regexp_data: RegExp data (FixedArray) |
| 2831 | // Check that the number of captures fit in the static offsets vector buffer. |
| 2832 | __ ldr(r2, |
| 2833 | FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2834 | // Check (number_of_captures + 1) * 2 <= offsets vector size |
| 2835 | // Or number_of_captures * 2 <= offsets vector size - 2 |
| 2836 | // Multiplying by 2 comes for free since r2 is smi-tagged. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2837 | STATIC_ASSERT(kSmiTag == 0); |
| 2838 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2839 | STATIC_ASSERT(Isolate::kJSRegexpStaticOffsetsVectorSize >= 2); |
| 2840 | __ cmp(r2, Operand(Isolate::kJSRegexpStaticOffsetsVectorSize - 2)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2841 | __ b(hi, &runtime); |
| 2842 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 2843 | // Reset offset for possibly sliced string. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 2844 | __ mov(r9, Operand::Zero()); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2845 | __ ldr(subject, MemOperand(sp, kSubjectOffset)); |
| 2846 | __ JumpIfSmi(subject, &runtime); |
| 2847 | __ mov(r3, subject); // Make a copy of the original subject string. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2848 | __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 2849 | __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2850 | // subject: subject string |
| 2851 | // r3: subject string |
| 2852 | // r0: subject string instance type |
| 2853 | // regexp_data: RegExp data (FixedArray) |
| 2854 | // Handle subject string according to its encoding and representation: |
| 2855 | // (1) Sequential string? If yes, go to (5). |
| 2856 | // (2) Anything but sequential or cons? If yes, go to (6). |
| 2857 | // (3) Cons string. If the string is flat, replace subject with first string. |
| 2858 | // Otherwise bailout. |
| 2859 | // (4) Is subject external? If yes, go to (7). |
| 2860 | // (5) Sequential string. Load regexp code according to encoding. |
| 2861 | // (E) Carry on. |
| 2862 | /// [...] |
| 2863 | |
| 2864 | // Deferred code at the end of the stub: |
| 2865 | // (6) Not a long external string? If yes, go to (8). |
| 2866 | // (7) External string. Make it, offset-wise, look like a sequential string. |
| 2867 | // Go to (5). |
| 2868 | // (8) Short external string or not a string? If yes, bail out to runtime. |
| 2869 | // (9) Sliced string. Replace subject with parent. Go to (4). |
| 2870 | |
| 2871 | Label seq_string /* 5 */, external_string /* 7 */, |
| 2872 | check_underlying /* 4 */, not_seq_nor_cons /* 6 */, |
| 2873 | not_long_external /* 8 */; |
| 2874 | |
| 2875 | // (1) Sequential string? If yes, go to (5). |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 2876 | __ and_(r1, |
| 2877 | r0, |
| 2878 | Operand(kIsNotStringMask | |
| 2879 | kStringRepresentationMask | |
| 2880 | kShortExternalStringMask), |
| 2881 | SetCC); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2882 | STATIC_ASSERT((kStringTag | kSeqStringTag) == 0); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2883 | __ b(eq, &seq_string); // Go to (5). |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2884 | |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2885 | // (2) Anything but sequential or cons? If yes, go to (6). |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2886 | STATIC_ASSERT(kConsStringTag < kExternalStringTag); |
| 2887 | STATIC_ASSERT(kSlicedStringTag > kExternalStringTag); |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 2888 | STATIC_ASSERT(kIsNotStringMask > kExternalStringTag); |
| 2889 | STATIC_ASSERT(kShortExternalStringTag > kExternalStringTag); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 2890 | __ cmp(r1, Operand(kExternalStringTag)); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2891 | __ b(ge, ¬_seq_nor_cons); // Go to (6). |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 2892 | |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2893 | // (3) Cons string. Check that it's flat. |
| 2894 | // Replace subject with first string and reload instance type. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2895 | __ ldr(r0, FieldMemOperand(subject, ConsString::kSecondOffset)); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 2896 | __ CompareRoot(r0, Heap::kempty_stringRootIndex); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2897 | __ b(ne, &runtime); |
| 2898 | __ ldr(subject, FieldMemOperand(subject, ConsString::kFirstOffset)); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2899 | |
| 2900 | // (4) Is subject external? If yes, go to (7). |
| 2901 | __ bind(&check_underlying); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2902 | __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 2903 | __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2904 | STATIC_ASSERT(kSeqStringTag == 0); |
| 2905 | __ tst(r0, Operand(kStringRepresentationMask)); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2906 | // The underlying external string is never a short external string. |
| 2907 | STATIC_CHECK(ExternalString::kMaxShortLength < ConsString::kMinLength); |
| 2908 | STATIC_CHECK(ExternalString::kMaxShortLength < SlicedString::kMinLength); |
| 2909 | __ b(ne, &external_string); // Go to (7). |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 2910 | |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2911 | // (5) Sequential string. Load regexp code according to encoding. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2912 | __ bind(&seq_string); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2913 | // subject: sequential subject string (or look-alike, external string) |
| 2914 | // r3: original subject string |
| 2915 | // Load previous index and check range before r3 is overwritten. We have to |
| 2916 | // use r3 instead of subject here because subject might have been only made |
| 2917 | // to look like a sequential string when it actually is an external string. |
| 2918 | __ ldr(r1, MemOperand(sp, kPreviousIndexOffset)); |
| 2919 | __ JumpIfNotSmi(r1, &runtime); |
| 2920 | __ ldr(r3, FieldMemOperand(r3, String::kLengthOffset)); |
| 2921 | __ cmp(r3, Operand(r1)); |
| 2922 | __ b(ls, &runtime); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 2923 | __ SmiUntag(r1); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2924 | |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 2925 | STATIC_ASSERT(4 == kOneByteStringTag); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2926 | STATIC_ASSERT(kTwoByteStringTag == 0); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2927 | __ and_(r0, r0, Operand(kStringEncodingMask)); |
| 2928 | __ mov(r3, Operand(r0, ASR, 2), SetCC); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2929 | __ ldr(r6, FieldMemOperand(regexp_data, JSRegExp::kDataAsciiCodeOffset), ne); |
| 2930 | __ ldr(r6, FieldMemOperand(regexp_data, JSRegExp::kDataUC16CodeOffset), eq); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2931 | |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 2932 | // (E) Carry on. String handling is done. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2933 | // r6: irregexp code |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2934 | // Check that the irregexp code has been generated for the actual string |
| 2935 | // encoding. If it has, the field contains a code object otherwise it contains |
jkummerow@chromium.org | ddda9e8 | 2011-07-06 11:27:02 +0000 | [diff] [blame] | 2936 | // a smi (code flushing support). |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2937 | __ JumpIfSmi(r6, &runtime); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2938 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2939 | // r1: previous index |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 2940 | // r3: encoding of subject string (1 if ASCII, 0 if two_byte); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 2941 | // r6: code |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2942 | // subject: Subject string |
| 2943 | // regexp_data: RegExp data (FixedArray) |
| 2944 | // All checks done. Now push arguments for native regexp code. |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 2945 | __ IncrementCounter(isolate->counters()->regexp_entry_native(), 1, r0, r2); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2946 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2947 | // Isolates: note we add an additional parameter here (isolate pointer). |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 2948 | const int kRegExpExecuteArguments = 9; |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 2949 | const int kParameterRegisters = 4; |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2950 | __ EnterExitFrame(false, kRegExpExecuteArguments - kParameterRegisters); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2951 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2952 | // Stack pointer now points to cell where return address is to be written. |
| 2953 | // Arguments are before that on the stack or in registers. |
| 2954 | |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 2955 | // Argument 9 (sp[20]): Pass current isolate address. |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 2956 | __ mov(r0, Operand(ExternalReference::isolate_address(isolate))); |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 2957 | __ str(r0, MemOperand(sp, 5 * kPointerSize)); |
| 2958 | |
| 2959 | // Argument 8 (sp[16]): Indicate that this is a direct call from JavaScript. |
| 2960 | __ mov(r0, Operand(1)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2961 | __ str(r0, MemOperand(sp, 4 * kPointerSize)); |
| 2962 | |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 2963 | // Argument 7 (sp[12]): Start (high end) of backtracking stack memory area. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2964 | __ mov(r0, Operand(address_of_regexp_stack_memory_address)); |
| 2965 | __ ldr(r0, MemOperand(r0, 0)); |
| 2966 | __ mov(r2, Operand(address_of_regexp_stack_memory_size)); |
| 2967 | __ ldr(r2, MemOperand(r2, 0)); |
| 2968 | __ add(r0, r0, Operand(r2)); |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 2969 | __ str(r0, MemOperand(sp, 3 * kPointerSize)); |
| 2970 | |
| 2971 | // Argument 6: Set the number of capture registers to zero to force global |
| 2972 | // regexps to behave as non-global. This does not affect non-global regexps. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 2973 | __ mov(r0, Operand::Zero()); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2974 | __ str(r0, MemOperand(sp, 2 * kPointerSize)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2975 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2976 | // Argument 5 (sp[4]): static offsets vector buffer. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2977 | __ mov(r0, |
| 2978 | Operand(ExternalReference::address_of_static_offsets_vector(isolate))); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2979 | __ str(r0, MemOperand(sp, 1 * kPointerSize)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2980 | |
| 2981 | // For arguments 4 and 3 get string length, calculate start of string data and |
| 2982 | // calculate the shift of the index (0 for ASCII and 1 for two byte). |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2983 | __ add(r8, subject, Operand(SeqString::kHeaderSize - kHeapObjectTag)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2984 | __ eor(r3, r3, Operand(1)); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 2985 | // Load the length from the original subject string from the previous stack |
| 2986 | // frame. Therefore we have to use fp, which points exactly to two pointer |
| 2987 | // sizes below the previous sp. (Because creating a new stack frame pushes |
| 2988 | // the previous fp onto the stack and moves up sp by 2 * kPointerSize.) |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 2989 | __ ldr(subject, MemOperand(fp, kSubjectOffset + 2 * kPointerSize)); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 2990 | // If slice offset is not 0, load the length from the original sliced string. |
| 2991 | // Argument 4, r3: End of string data |
| 2992 | // Argument 3, r2: Start of string data |
| 2993 | // Prepare start and end index of the input. |
| 2994 | __ add(r9, r8, Operand(r9, LSL, r3)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2995 | __ add(r2, r9, Operand(r1, LSL, r3)); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 2996 | |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 2997 | __ ldr(r8, FieldMemOperand(subject, String::kLengthOffset)); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 2998 | __ SmiUntag(r8); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 2999 | __ add(r3, r9, Operand(r8, LSL, r3)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3000 | |
| 3001 | // Argument 2 (r1): Previous index. |
| 3002 | // Already there |
| 3003 | |
| 3004 | // Argument 1 (r0): Subject string. |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3005 | __ mov(r0, subject); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3006 | |
| 3007 | // Locate the code entry and call it. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3008 | __ add(r6, r6, Operand(Code::kHeaderSize - kHeapObjectTag)); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 3009 | DirectCEntryStub stub; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3010 | stub.GenerateCall(masm, r6); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 3011 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3012 | __ LeaveExitFrame(false, no_reg, true); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3013 | |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3014 | last_match_info_elements = r6; |
| 3015 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3016 | // r0: result |
| 3017 | // subject: subject string (callee saved) |
| 3018 | // regexp_data: RegExp data (callee saved) |
| 3019 | // last_match_info_elements: Last match info elements (callee saved) |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3020 | // Check the result. |
| 3021 | Label success; |
mstarzinger@chromium.org | 15613d0 | 2012-05-23 12:04:37 +0000 | [diff] [blame] | 3022 | __ cmp(r0, Operand(1)); |
| 3023 | // We expect exactly one result since we force the called regexp to behave |
| 3024 | // as non-global. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3025 | __ b(eq, &success); |
| 3026 | Label failure; |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3027 | __ cmp(r0, Operand(NativeRegExpMacroAssembler::FAILURE)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3028 | __ b(eq, &failure); |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3029 | __ cmp(r0, Operand(NativeRegExpMacroAssembler::EXCEPTION)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3030 | // If not exception it can only be retry. Handle that in the runtime system. |
| 3031 | __ b(ne, &runtime); |
| 3032 | // Result must now be exception. If there is no pending exception already a |
| 3033 | // stack overflow (on the backtrack stack) was detected in RegExp code but |
| 3034 | // haven't created the exception yet. Handle that in the runtime system. |
| 3035 | // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3036 | __ mov(r1, Operand(isolate->factory()->the_hole_value())); |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 3037 | __ mov(r2, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3038 | isolate))); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 3039 | __ ldr(r0, MemOperand(r2, 0)); |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3040 | __ cmp(r0, r1); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3041 | __ b(eq, &runtime); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 3042 | |
| 3043 | __ str(r1, MemOperand(r2, 0)); // Clear pending exception. |
| 3044 | |
| 3045 | // Check if the exception is a termination. If so, throw as uncatchable. |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3046 | __ CompareRoot(r0, Heap::kTerminationExceptionRootIndex); |
| 3047 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 3048 | Label termination_exception; |
| 3049 | __ b(eq, &termination_exception); |
| 3050 | |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 3051 | __ Throw(r0); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 3052 | |
| 3053 | __ bind(&termination_exception); |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 3054 | __ ThrowUncatchable(r0); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 3055 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3056 | __ bind(&failure); |
| 3057 | // For failure and exception return null. |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 3058 | __ mov(r0, Operand(masm->isolate()->factory()->null_value())); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3059 | __ add(sp, sp, Operand(4 * kPointerSize)); |
| 3060 | __ Ret(); |
| 3061 | |
| 3062 | // Process the result from the native regexp code. |
| 3063 | __ bind(&success); |
| 3064 | __ ldr(r1, |
| 3065 | FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
| 3066 | // Calculate number of capture registers (number_of_captures + 1) * 2. |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 3067 | // Multiplying by 2 comes for free since r1 is smi-tagged. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3068 | STATIC_ASSERT(kSmiTag == 0); |
| 3069 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 3070 | __ add(r1, r1, Operand(2)); // r1 was a smi. |
| 3071 | |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 3072 | __ ldr(r0, MemOperand(sp, kLastMatchInfoOffset)); |
| 3073 | __ JumpIfSmi(r0, &runtime); |
| 3074 | __ CompareObjectType(r0, r2, r2, JS_ARRAY_TYPE); |
| 3075 | __ b(ne, &runtime); |
| 3076 | // Check that the JSArray is in fast case. |
| 3077 | __ ldr(last_match_info_elements, |
| 3078 | FieldMemOperand(r0, JSArray::kElementsOffset)); |
| 3079 | __ ldr(r0, FieldMemOperand(last_match_info_elements, HeapObject::kMapOffset)); |
| 3080 | __ CompareRoot(r0, Heap::kFixedArrayMapRootIndex); |
| 3081 | __ b(ne, &runtime); |
| 3082 | // Check that the last match info has space for the capture registers and the |
| 3083 | // additional information. |
| 3084 | __ ldr(r0, |
| 3085 | FieldMemOperand(last_match_info_elements, FixedArray::kLengthOffset)); |
| 3086 | __ add(r2, r1, Operand(RegExpImpl::kLastMatchOverhead)); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3087 | __ cmp(r2, Operand::SmiUntag(r0)); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 3088 | __ b(gt, &runtime); |
| 3089 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3090 | // r1: number of capture registers |
| 3091 | // r4: subject string |
| 3092 | // Store the capture count. |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3093 | __ SmiTag(r2, r1); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3094 | __ str(r2, FieldMemOperand(last_match_info_elements, |
| 3095 | RegExpImpl::kLastCaptureCountOffset)); |
| 3096 | // Store last subject and last input. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3097 | __ str(subject, |
| 3098 | FieldMemOperand(last_match_info_elements, |
| 3099 | RegExpImpl::kLastSubjectOffset)); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3100 | __ mov(r2, subject); |
| 3101 | __ RecordWriteField(last_match_info_elements, |
| 3102 | RegExpImpl::kLastSubjectOffset, |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 3103 | subject, |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3104 | r3, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3105 | kLRHasNotBeenSaved, |
| 3106 | kDontSaveFPRegs); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 3107 | __ mov(subject, r2); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3108 | __ str(subject, |
| 3109 | FieldMemOperand(last_match_info_elements, |
| 3110 | RegExpImpl::kLastInputOffset)); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3111 | __ RecordWriteField(last_match_info_elements, |
| 3112 | RegExpImpl::kLastInputOffset, |
| 3113 | subject, |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3114 | r3, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3115 | kLRHasNotBeenSaved, |
| 3116 | kDontSaveFPRegs); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3117 | |
| 3118 | // Get the static offsets vector filled by the native regexp code. |
| 3119 | ExternalReference address_of_static_offsets_vector = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3120 | ExternalReference::address_of_static_offsets_vector(isolate); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3121 | __ mov(r2, Operand(address_of_static_offsets_vector)); |
| 3122 | |
| 3123 | // r1: number of capture registers |
| 3124 | // r2: offsets vector |
| 3125 | Label next_capture, done; |
| 3126 | // Capture register counter starts from number of capture registers and |
| 3127 | // counts down until wraping after zero. |
| 3128 | __ add(r0, |
| 3129 | last_match_info_elements, |
| 3130 | Operand(RegExpImpl::kFirstCaptureOffset - kHeapObjectTag)); |
| 3131 | __ bind(&next_capture); |
| 3132 | __ sub(r1, r1, Operand(1), SetCC); |
| 3133 | __ b(mi, &done); |
| 3134 | // Read the value from the static offsets vector buffer. |
| 3135 | __ ldr(r3, MemOperand(r2, kPointerSize, PostIndex)); |
| 3136 | // Store the smi value in the last match info. |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3137 | __ SmiTag(r3); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3138 | __ str(r3, MemOperand(r0, kPointerSize, PostIndex)); |
| 3139 | __ jmp(&next_capture); |
| 3140 | __ bind(&done); |
| 3141 | |
| 3142 | // Return last match info. |
| 3143 | __ ldr(r0, MemOperand(sp, kLastMatchInfoOffset)); |
| 3144 | __ add(sp, sp, Operand(4 * kPointerSize)); |
| 3145 | __ Ret(); |
| 3146 | |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 3147 | // Do the runtime call to execute the regexp. |
| 3148 | __ bind(&runtime); |
| 3149 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 3150 | |
| 3151 | // Deferred code for string handling. |
| 3152 | // (6) Not a long external string? If yes, go to (8). |
| 3153 | __ bind(¬_seq_nor_cons); |
| 3154 | // Compare flags are still set. |
| 3155 | __ b(gt, ¬_long_external); // Go to (8). |
| 3156 | |
| 3157 | // (7) External string. Make it, offset-wise, look like a sequential string. |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 3158 | __ bind(&external_string); |
| 3159 | __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 3160 | __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); |
| 3161 | if (FLAG_debug_code) { |
| 3162 | // Assert that we do not have a cons or slice (indirect strings) here. |
| 3163 | // Sequential strings have already been ruled out. |
| 3164 | __ tst(r0, Operand(kIsIndirectStringMask)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3165 | __ Assert(eq, kExternalStringExpectedButNotFound); |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 3166 | } |
| 3167 | __ ldr(subject, |
| 3168 | FieldMemOperand(subject, ExternalString::kResourceDataOffset)); |
| 3169 | // Move the pointer so that offset-wise, it looks like a sequential string. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 3170 | STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 3171 | __ sub(subject, |
| 3172 | subject, |
| 3173 | Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 3174 | __ jmp(&seq_string); // Go to (5). |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 3175 | |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 3176 | // (8) Short external string or not a string? If yes, bail out to runtime. |
| 3177 | __ bind(¬_long_external); |
| 3178 | STATIC_ASSERT(kNotStringTag != 0 && kShortExternalStringTag !=0); |
| 3179 | __ tst(r1, Operand(kIsNotStringMask | kShortExternalStringMask)); |
| 3180 | __ b(ne, &runtime); |
| 3181 | |
| 3182 | // (9) Sliced string. Replace subject with parent. Go to (4). |
| 3183 | // Load offset into r9 and replace subject string with parent. |
| 3184 | __ ldr(r9, FieldMemOperand(subject, SlicedString::kOffsetOffset)); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3185 | __ SmiUntag(r9); |
mstarzinger@chromium.org | 71fc346 | 2013-02-27 09:34:27 +0000 | [diff] [blame] | 3186 | __ ldr(subject, FieldMemOperand(subject, SlicedString::kParentOffset)); |
| 3187 | __ jmp(&check_underlying); // Go to (4). |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3188 | #endif // V8_INTERPRETED_REGEXP |
| 3189 | } |
| 3190 | |
| 3191 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3192 | void RegExpConstructResultStub::Generate(MacroAssembler* masm) { |
| 3193 | const int kMaxInlineLength = 100; |
| 3194 | Label slowcase; |
| 3195 | Label done; |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 3196 | Factory* factory = masm->isolate()->factory(); |
| 3197 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3198 | __ ldr(r1, MemOperand(sp, kPointerSize * 2)); |
| 3199 | STATIC_ASSERT(kSmiTag == 0); |
| 3200 | STATIC_ASSERT(kSmiTagSize == 1); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 3201 | __ JumpIfNotSmi(r1, &slowcase); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3202 | __ cmp(r1, Operand(Smi::FromInt(kMaxInlineLength))); |
| 3203 | __ b(hi, &slowcase); |
| 3204 | // Smi-tagging is equivalent to multiplying by 2. |
| 3205 | // Allocate RegExpResult followed by FixedArray with size in ebx. |
| 3206 | // JSArray: [Map][empty properties][Elements][Length-smi][index][input] |
| 3207 | // Elements: [Map][Length][..elements..] |
| 3208 | // Size of JSArray with two in-object properties and the header of a |
| 3209 | // FixedArray. |
| 3210 | int objects_size = |
| 3211 | (JSRegExpResult::kSize + FixedArray::kHeaderSize) / kPointerSize; |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3212 | __ SmiUntag(r5, r1); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3213 | __ add(r2, r5, Operand(objects_size)); |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 3214 | __ Allocate( |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3215 | r2, // In: Size, in words. |
| 3216 | r0, // Out: Start of allocation (tagged). |
| 3217 | r3, // Scratch register. |
| 3218 | r4, // Scratch register. |
| 3219 | &slowcase, |
| 3220 | static_cast<AllocationFlags>(TAG_OBJECT | SIZE_IN_WORDS)); |
| 3221 | // r0: Start of allocated area, object-tagged. |
| 3222 | // r1: Number of elements in array, as smi. |
| 3223 | // r5: Number of elements, untagged. |
| 3224 | |
| 3225 | // Set JSArray map to global.regexp_result_map(). |
| 3226 | // Set empty properties FixedArray. |
| 3227 | // Set elements to point to FixedArray allocated right after the JSArray. |
| 3228 | // Interleave operations for better latency. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 3229 | __ ldr(r2, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX)); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3230 | __ add(r3, r0, Operand(JSRegExpResult::kSize)); |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 3231 | __ mov(r4, Operand(factory->empty_fixed_array())); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 3232 | __ ldr(r2, FieldMemOperand(r2, GlobalObject::kNativeContextOffset)); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3233 | __ str(r3, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| 3234 | __ ldr(r2, ContextOperand(r2, Context::REGEXP_RESULT_MAP_INDEX)); |
| 3235 | __ str(r4, FieldMemOperand(r0, JSObject::kPropertiesOffset)); |
| 3236 | __ str(r2, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 3237 | |
| 3238 | // Set input, index and length fields from arguments. |
| 3239 | __ ldr(r1, MemOperand(sp, kPointerSize * 0)); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3240 | __ ldr(r2, MemOperand(sp, kPointerSize * 1)); |
| 3241 | __ ldr(r6, MemOperand(sp, kPointerSize * 2)); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3242 | __ str(r1, FieldMemOperand(r0, JSRegExpResult::kInputOffset)); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3243 | __ str(r2, FieldMemOperand(r0, JSRegExpResult::kIndexOffset)); |
| 3244 | __ str(r6, FieldMemOperand(r0, JSArray::kLengthOffset)); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3245 | |
| 3246 | // Fill out the elements FixedArray. |
| 3247 | // r0: JSArray, tagged. |
| 3248 | // r3: FixedArray, tagged. |
| 3249 | // r5: Number of elements in array, untagged. |
| 3250 | |
| 3251 | // Set map. |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 3252 | __ mov(r2, Operand(factory->fixed_array_map())); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3253 | __ str(r2, FieldMemOperand(r3, HeapObject::kMapOffset)); |
| 3254 | // Set FixedArray length. |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3255 | __ SmiTag(r6, r5); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3256 | __ str(r6, FieldMemOperand(r3, FixedArray::kLengthOffset)); |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 3257 | // Fill contents of fixed-array with undefined. |
| 3258 | __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3259 | __ add(r3, r3, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 3260 | // Fill fixed array elements with undefined. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3261 | // r0: JSArray, tagged. |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 3262 | // r2: undefined. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3263 | // r3: Start of elements in FixedArray. |
| 3264 | // r5: Number of elements to fill. |
| 3265 | Label loop; |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3266 | __ cmp(r5, Operand::Zero()); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3267 | __ bind(&loop); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3268 | __ b(le, &done); // Jump if r5 is negative or zero. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3269 | __ sub(r5, r5, Operand(1), SetCC); |
| 3270 | __ str(r2, MemOperand(r3, r5, LSL, kPointerSizeLog2)); |
| 3271 | __ jmp(&loop); |
| 3272 | |
| 3273 | __ bind(&done); |
| 3274 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 3275 | __ Ret(); |
| 3276 | |
| 3277 | __ bind(&slowcase); |
| 3278 | __ TailCallRuntime(Runtime::kRegExpConstructResult, 3, 1); |
| 3279 | } |
| 3280 | |
| 3281 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3282 | static void GenerateRecordCallTarget(MacroAssembler* masm) { |
| 3283 | // Cache the called function in a global property cell. Cache states |
| 3284 | // are uninitialized, monomorphic (indicated by a JSFunction), and |
| 3285 | // megamorphic. |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3286 | // r0 : number of arguments to the construct function |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3287 | // r1 : the function to call |
| 3288 | // r2 : cache cell for call target |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3289 | Label initialize, done, miss, megamorphic, not_array_function; |
| 3290 | |
| 3291 | ASSERT_EQ(*TypeFeedbackCells::MegamorphicSentinel(masm->isolate()), |
| 3292 | masm->isolate()->heap()->undefined_value()); |
| 3293 | ASSERT_EQ(*TypeFeedbackCells::UninitializedSentinel(masm->isolate()), |
| 3294 | masm->isolate()->heap()->the_hole_value()); |
| 3295 | |
| 3296 | // Load the cache state into r3. |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 3297 | __ ldr(r3, FieldMemOperand(r2, Cell::kValueOffset)); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3298 | |
| 3299 | // A monomorphic cache hit or an already megamorphic state: invoke the |
| 3300 | // function without changing the state. |
| 3301 | __ cmp(r3, r1); |
| 3302 | __ b(eq, &done); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3303 | |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 3304 | // If we came here, we need to see if we are the array function. |
| 3305 | // If we didn't have a matching function, and we didn't find the megamorph |
| 3306 | // sentinel, then we have in the cell either some other function or an |
| 3307 | // AllocationSite. Do a map check on the object in ecx. |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 3308 | __ ldr(r5, FieldMemOperand(r3, 0)); |
| 3309 | __ CompareRoot(r5, Heap::kAllocationSiteMapRootIndex); |
| 3310 | __ b(ne, &miss); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 3311 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3312 | // Make sure the function is the Array() function |
| 3313 | __ LoadArrayFunction(r3); |
| 3314 | __ cmp(r1, r3); |
| 3315 | __ b(ne, &megamorphic); |
| 3316 | __ jmp(&done); |
| 3317 | |
| 3318 | __ bind(&miss); |
| 3319 | |
| 3320 | // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
| 3321 | // megamorphic. |
| 3322 | __ CompareRoot(r3, Heap::kTheHoleValueRootIndex); |
| 3323 | __ b(eq, &initialize); |
| 3324 | // MegamorphicSentinel is an immortal immovable object (undefined) so no |
| 3325 | // write-barrier is needed. |
| 3326 | __ bind(&megamorphic); |
| 3327 | __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 3328 | __ str(ip, FieldMemOperand(r2, Cell::kValueOffset)); |
jkummerow@chromium.org | 4e308cf | 2013-05-17 13:39:16 +0000 | [diff] [blame] | 3329 | __ jmp(&done); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3330 | |
| 3331 | // An uninitialized cache is patched with the function or sentinel to |
| 3332 | // indicate the ElementsKind if function is the Array constructor. |
| 3333 | __ bind(&initialize); |
| 3334 | // Make sure the function is the Array() function |
| 3335 | __ LoadArrayFunction(r3); |
| 3336 | __ cmp(r1, r3); |
| 3337 | __ b(ne, ¬_array_function); |
| 3338 | |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 3339 | // The target function is the Array constructor, |
| 3340 | // Create an AllocationSite if we don't already have it, store it in the cell |
| 3341 | { |
| 3342 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 3343 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3344 | // Arguments register must be smi-tagged to call out. |
verwaest@chromium.org | 662436e | 2013-08-28 08:41:27 +0000 | [diff] [blame] | 3345 | __ SmiTag(r0); |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 3346 | __ push(r0); |
| 3347 | __ push(r1); |
| 3348 | __ push(r2); |
| 3349 | |
| 3350 | CreateAllocationSiteStub create_stub; |
| 3351 | __ CallStub(&create_stub); |
| 3352 | |
| 3353 | __ pop(r2); |
| 3354 | __ pop(r1); |
| 3355 | __ pop(r0); |
verwaest@chromium.org | 662436e | 2013-08-28 08:41:27 +0000 | [diff] [blame] | 3356 | __ SmiUntag(r0); |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 3357 | } |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3358 | __ b(&done); |
| 3359 | |
| 3360 | __ bind(¬_array_function); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 3361 | __ str(r1, FieldMemOperand(r2, Cell::kValueOffset)); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3362 | // No need for a write barrier here - cells are rescanned. |
| 3363 | |
| 3364 | __ bind(&done); |
| 3365 | } |
| 3366 | |
| 3367 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3368 | void CallFunctionStub::Generate(MacroAssembler* masm) { |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 3369 | // r1 : the function to call |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3370 | // r2 : cache cell for call target |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 3371 | Label slow, non_function; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3372 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3373 | // The receiver might implicitly be the global object. This is |
| 3374 | // indicated by passing the hole as the receiver to the call |
| 3375 | // function stub. |
| 3376 | if (ReceiverMightBeImplicit()) { |
| 3377 | Label call; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3378 | // Get the receiver from the stack. |
| 3379 | // function, receiver [, arguments] |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3380 | __ ldr(r4, MemOperand(sp, argc_ * kPointerSize)); |
| 3381 | // Call as function is indicated with the hole. |
| 3382 | __ CompareRoot(r4, Heap::kTheHoleValueRootIndex); |
| 3383 | __ b(ne, &call); |
| 3384 | // Patch the receiver on the stack with the global receiver object. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 3385 | __ ldr(r3, |
| 3386 | MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
mstarzinger@chromium.org | 88d326b | 2012-04-23 12:57:22 +0000 | [diff] [blame] | 3387 | __ ldr(r3, FieldMemOperand(r3, GlobalObject::kGlobalReceiverOffset)); |
| 3388 | __ str(r3, MemOperand(sp, argc_ * kPointerSize)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3389 | __ bind(&call); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3390 | } |
| 3391 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3392 | // Check that the function is really a JavaScript function. |
| 3393 | // r1: pushed function (to be verified) |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 3394 | __ JumpIfSmi(r1, &non_function); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3395 | // Get the map of the function object. |
mstarzinger@chromium.org | 88d326b | 2012-04-23 12:57:22 +0000 | [diff] [blame] | 3396 | __ CompareObjectType(r1, r3, r3, JS_FUNCTION_TYPE); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3397 | __ b(ne, &slow); |
| 3398 | |
mstarzinger@chromium.org | 88d326b | 2012-04-23 12:57:22 +0000 | [diff] [blame] | 3399 | if (RecordCallTarget()) { |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 3400 | GenerateRecordCallTarget(masm); |
mstarzinger@chromium.org | 88d326b | 2012-04-23 12:57:22 +0000 | [diff] [blame] | 3401 | } |
| 3402 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3403 | // Fast-case: Invoke the function now. |
| 3404 | // r1: pushed function |
| 3405 | ParameterCount actual(argc_); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3406 | |
| 3407 | if (ReceiverMightBeImplicit()) { |
| 3408 | Label call_as_function; |
| 3409 | __ CompareRoot(r4, Heap::kTheHoleValueRootIndex); |
| 3410 | __ b(eq, &call_as_function); |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 3411 | __ InvokeFunction(r1, |
| 3412 | actual, |
| 3413 | JUMP_FUNCTION, |
| 3414 | NullCallWrapper(), |
| 3415 | CALL_AS_METHOD); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3416 | __ bind(&call_as_function); |
| 3417 | } |
| 3418 | __ InvokeFunction(r1, |
| 3419 | actual, |
| 3420 | JUMP_FUNCTION, |
| 3421 | NullCallWrapper(), |
| 3422 | CALL_AS_FUNCTION); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3423 | |
| 3424 | // Slow-case: Non-function called. |
| 3425 | __ bind(&slow); |
mstarzinger@chromium.org | 88d326b | 2012-04-23 12:57:22 +0000 | [diff] [blame] | 3426 | if (RecordCallTarget()) { |
| 3427 | // If there is a call target cache, mark it megamorphic in the |
| 3428 | // non-function case. MegamorphicSentinel is an immortal immovable |
| 3429 | // object (undefined) so no write barrier is needed. |
| 3430 | ASSERT_EQ(*TypeFeedbackCells::MegamorphicSentinel(masm->isolate()), |
| 3431 | masm->isolate()->heap()->undefined_value()); |
| 3432 | __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 3433 | __ str(ip, FieldMemOperand(r2, Cell::kValueOffset)); |
mstarzinger@chromium.org | 88d326b | 2012-04-23 12:57:22 +0000 | [diff] [blame] | 3434 | } |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 3435 | // Check for function proxy. |
mstarzinger@chromium.org | 88d326b | 2012-04-23 12:57:22 +0000 | [diff] [blame] | 3436 | __ cmp(r3, Operand(JS_FUNCTION_PROXY_TYPE)); |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 3437 | __ b(ne, &non_function); |
| 3438 | __ push(r1); // put proxy as additional argument |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3439 | __ mov(r0, Operand(argc_ + 1, RelocInfo::NONE32)); |
| 3440 | __ mov(r2, Operand::Zero()); |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 3441 | __ GetBuiltinEntry(r3, Builtins::CALL_FUNCTION_PROXY); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 3442 | __ SetCallKind(r5, CALL_AS_METHOD); |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 3443 | { |
| 3444 | Handle<Code> adaptor = |
| 3445 | masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
| 3446 | __ Jump(adaptor, RelocInfo::CODE_TARGET); |
| 3447 | } |
| 3448 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3449 | // CALL_NON_FUNCTION expects the non-function callee as receiver (instead |
| 3450 | // of the original receiver from the call site). |
lrn@chromium.org | 34e6078 | 2011-09-15 07:25:40 +0000 | [diff] [blame] | 3451 | __ bind(&non_function); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3452 | __ str(r1, MemOperand(sp, argc_ * kPointerSize)); |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 3453 | __ mov(r0, Operand(argc_)); // Set up the number of arguments. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3454 | __ mov(r2, Operand::Zero()); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3455 | __ GetBuiltinEntry(r3, Builtins::CALL_NON_FUNCTION); |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 3456 | __ SetCallKind(r5, CALL_AS_METHOD); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 3457 | __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3458 | RelocInfo::CODE_TARGET); |
| 3459 | } |
| 3460 | |
| 3461 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3462 | void CallConstructStub::Generate(MacroAssembler* masm) { |
| 3463 | // r0 : number of arguments |
| 3464 | // r1 : the function to call |
| 3465 | // r2 : cache cell for call target |
| 3466 | Label slow, non_function_call; |
| 3467 | |
| 3468 | // Check that the function is not a smi. |
| 3469 | __ JumpIfSmi(r1, &non_function_call); |
| 3470 | // Check that the function is a JSFunction. |
| 3471 | __ CompareObjectType(r1, r3, r3, JS_FUNCTION_TYPE); |
| 3472 | __ b(ne, &slow); |
| 3473 | |
| 3474 | if (RecordCallTarget()) { |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 3475 | GenerateRecordCallTarget(masm); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3476 | } |
| 3477 | |
| 3478 | // Jump to the function-specific construct stub. |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 3479 | Register jmp_reg = r3; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3480 | __ ldr(jmp_reg, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 3481 | __ ldr(jmp_reg, FieldMemOperand(jmp_reg, |
| 3482 | SharedFunctionInfo::kConstructStubOffset)); |
| 3483 | __ add(pc, jmp_reg, Operand(Code::kHeaderSize - kHeapObjectTag)); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3484 | |
| 3485 | // r0: number of arguments |
| 3486 | // r1: called object |
| 3487 | // r3: object type |
| 3488 | Label do_call; |
| 3489 | __ bind(&slow); |
| 3490 | __ cmp(r3, Operand(JS_FUNCTION_PROXY_TYPE)); |
| 3491 | __ b(ne, &non_function_call); |
| 3492 | __ GetBuiltinEntry(r3, Builtins::CALL_FUNCTION_PROXY_AS_CONSTRUCTOR); |
| 3493 | __ jmp(&do_call); |
| 3494 | |
| 3495 | __ bind(&non_function_call); |
| 3496 | __ GetBuiltinEntry(r3, Builtins::CALL_NON_FUNCTION_AS_CONSTRUCTOR); |
| 3497 | __ bind(&do_call); |
| 3498 | // Set expected number of arguments to zero (not changing r0). |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3499 | __ mov(r2, Operand::Zero()); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3500 | __ SetCallKind(r5, CALL_AS_METHOD); |
| 3501 | __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 3502 | RelocInfo::CODE_TARGET); |
| 3503 | } |
| 3504 | |
| 3505 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3506 | // StringCharCodeAtGenerator |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3507 | void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 3508 | Label flat_string; |
| 3509 | Label ascii_string; |
| 3510 | Label got_char_code; |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 3511 | Label sliced_string; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3512 | |
| 3513 | // If the receiver is a smi trigger the non-string case. |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 3514 | __ JumpIfSmi(object_, receiver_not_string_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3515 | |
| 3516 | // Fetch the instance type of the receiver into result register. |
| 3517 | __ ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 3518 | __ ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| 3519 | // If the receiver is not a string trigger the non-string case. |
| 3520 | __ tst(result_, Operand(kIsNotStringMask)); |
| 3521 | __ b(ne, receiver_not_string_); |
| 3522 | |
| 3523 | // If the index is non-smi trigger the non-smi case. |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 3524 | __ JumpIfNotSmi(index_, &index_not_smi_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3525 | __ bind(&got_smi_index_); |
| 3526 | |
| 3527 | // Check for index out of range. |
| 3528 | __ ldr(ip, FieldMemOperand(object_, String::kLengthOffset)); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 3529 | __ cmp(ip, Operand(index_)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3530 | __ b(ls, index_out_of_range_); |
| 3531 | |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3532 | __ SmiUntag(index_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3533 | |
mstarzinger@chromium.org | 1b3afd1 | 2011-11-29 14:28:56 +0000 | [diff] [blame] | 3534 | StringCharLoadGenerator::Generate(masm, |
| 3535 | object_, |
| 3536 | index_, |
| 3537 | result_, |
| 3538 | &call_runtime_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3539 | |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3540 | __ SmiTag(result_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3541 | __ bind(&exit_); |
| 3542 | } |
| 3543 | |
| 3544 | |
| 3545 | void StringCharCodeAtGenerator::GenerateSlow( |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 3546 | MacroAssembler* masm, |
| 3547 | const RuntimeCallHelper& call_helper) { |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3548 | __ Abort(kUnexpectedFallthroughToCharCodeAtSlowCase); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3549 | |
| 3550 | // Index is not a smi. |
| 3551 | __ bind(&index_not_smi_); |
| 3552 | // If index is a heap number, try converting it to an integer. |
| 3553 | __ CheckMap(index_, |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 3554 | result_, |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3555 | Heap::kHeapNumberMapRootIndex, |
| 3556 | index_not_number_, |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 3557 | DONT_DO_SMI_CHECK); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3558 | call_helper.BeforeCall(masm); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 3559 | __ push(object_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3560 | __ push(index_); // Consumed by runtime conversion function. |
| 3561 | if (index_flags_ == STRING_INDEX_IS_NUMBER) { |
| 3562 | __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero, 1); |
| 3563 | } else { |
| 3564 | ASSERT(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); |
| 3565 | // NumberToSmi discards numbers that are not exact integers. |
| 3566 | __ CallRuntime(Runtime::kNumberToSmi, 1); |
| 3567 | } |
| 3568 | // Save the conversion result before the pop instructions below |
| 3569 | // have a chance to overwrite it. |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 3570 | __ Move(index_, r0); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3571 | __ pop(object_); |
| 3572 | // Reload the instance type. |
| 3573 | __ ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 3574 | __ ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| 3575 | call_helper.AfterCall(masm); |
| 3576 | // If index is still not a smi, it must be out of range. |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 3577 | __ JumpIfNotSmi(index_, index_out_of_range_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3578 | // Otherwise, return to the fast path. |
| 3579 | __ jmp(&got_smi_index_); |
| 3580 | |
| 3581 | // Call runtime. We get here when the receiver is a string and the |
| 3582 | // index is a number, but the code of getting the actual character |
| 3583 | // is too complex (e.g., when the string needs to be flattened). |
| 3584 | __ bind(&call_runtime_); |
| 3585 | call_helper.BeforeCall(masm); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3586 | __ SmiTag(index_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3587 | __ Push(object_, index_); |
| 3588 | __ CallRuntime(Runtime::kStringCharCodeAt, 2); |
| 3589 | __ Move(result_, r0); |
| 3590 | call_helper.AfterCall(masm); |
| 3591 | __ jmp(&exit_); |
| 3592 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3593 | __ Abort(kUnexpectedFallthroughFromCharCodeAtSlowCase); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3594 | } |
| 3595 | |
| 3596 | |
| 3597 | // ------------------------------------------------------------------------- |
| 3598 | // StringCharFromCodeGenerator |
| 3599 | |
| 3600 | void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
| 3601 | // Fast case of Heap::LookupSingleCharacterStringFromCode. |
| 3602 | STATIC_ASSERT(kSmiTag == 0); |
| 3603 | STATIC_ASSERT(kSmiShiftSize == 0); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3604 | ASSERT(IsPowerOf2(String::kMaxOneByteCharCode + 1)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3605 | __ tst(code_, |
| 3606 | Operand(kSmiTagMask | |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3607 | ((~String::kMaxOneByteCharCode) << kSmiTagSize))); |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 3608 | __ b(ne, &slow_case_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3609 | |
| 3610 | __ LoadRoot(result_, Heap::kSingleCharacterStringCacheRootIndex); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3611 | // At this point code register contains smi tagged ASCII char code. |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3612 | __ add(result_, result_, Operand::PointerOffsetFromSmiKey(code_)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3613 | __ ldr(result_, FieldMemOperand(result_, FixedArray::kHeaderSize)); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 3614 | __ CompareRoot(result_, Heap::kUndefinedValueRootIndex); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3615 | __ b(eq, &slow_case_); |
| 3616 | __ bind(&exit_); |
| 3617 | } |
| 3618 | |
| 3619 | |
| 3620 | void StringCharFromCodeGenerator::GenerateSlow( |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 3621 | MacroAssembler* masm, |
| 3622 | const RuntimeCallHelper& call_helper) { |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3623 | __ Abort(kUnexpectedFallthroughToCharFromCodeSlowCase); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3624 | |
| 3625 | __ bind(&slow_case_); |
| 3626 | call_helper.BeforeCall(masm); |
| 3627 | __ push(code_); |
| 3628 | __ CallRuntime(Runtime::kCharFromCode, 1); |
| 3629 | __ Move(result_, r0); |
| 3630 | call_helper.AfterCall(masm); |
| 3631 | __ jmp(&exit_); |
| 3632 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3633 | __ Abort(kUnexpectedFallthroughFromCharFromCodeSlowCase); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3634 | } |
| 3635 | |
| 3636 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3637 | void StringHelper::GenerateCopyCharacters(MacroAssembler* masm, |
| 3638 | Register dest, |
| 3639 | Register src, |
| 3640 | Register count, |
| 3641 | Register scratch, |
| 3642 | bool ascii) { |
| 3643 | Label loop; |
| 3644 | Label done; |
| 3645 | // This loop just copies one character at a time, as it is only used for very |
| 3646 | // short strings. |
| 3647 | if (!ascii) { |
| 3648 | __ add(count, count, Operand(count), SetCC); |
| 3649 | } else { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3650 | __ cmp(count, Operand::Zero()); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3651 | } |
| 3652 | __ b(eq, &done); |
| 3653 | |
| 3654 | __ bind(&loop); |
| 3655 | __ ldrb(scratch, MemOperand(src, 1, PostIndex)); |
| 3656 | // Perform sub between load and dependent store to get the load time to |
| 3657 | // complete. |
| 3658 | __ sub(count, count, Operand(1), SetCC); |
| 3659 | __ strb(scratch, MemOperand(dest, 1, PostIndex)); |
| 3660 | // last iteration. |
| 3661 | __ b(gt, &loop); |
| 3662 | |
| 3663 | __ bind(&done); |
| 3664 | } |
| 3665 | |
| 3666 | |
| 3667 | enum CopyCharactersFlags { |
| 3668 | COPY_ASCII = 1, |
| 3669 | DEST_ALWAYS_ALIGNED = 2 |
| 3670 | }; |
| 3671 | |
| 3672 | |
| 3673 | void StringHelper::GenerateCopyCharactersLong(MacroAssembler* masm, |
| 3674 | Register dest, |
| 3675 | Register src, |
| 3676 | Register count, |
| 3677 | Register scratch1, |
| 3678 | Register scratch2, |
| 3679 | Register scratch3, |
| 3680 | Register scratch4, |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3681 | int flags) { |
| 3682 | bool ascii = (flags & COPY_ASCII) != 0; |
| 3683 | bool dest_always_aligned = (flags & DEST_ALWAYS_ALIGNED) != 0; |
| 3684 | |
| 3685 | if (dest_always_aligned && FLAG_debug_code) { |
| 3686 | // Check that destination is actually word aligned if the flag says |
| 3687 | // that it is. |
| 3688 | __ tst(dest, Operand(kPointerAlignmentMask)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3689 | __ Check(eq, kDestinationOfCopyNotAligned); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3690 | } |
| 3691 | |
| 3692 | const int kReadAlignment = 4; |
| 3693 | const int kReadAlignmentMask = kReadAlignment - 1; |
| 3694 | // Ensure that reading an entire aligned word containing the last character |
| 3695 | // of a string will not read outside the allocated area (because we pad up |
| 3696 | // to kObjectAlignment). |
| 3697 | STATIC_ASSERT(kObjectAlignment >= kReadAlignment); |
| 3698 | // Assumes word reads and writes are little endian. |
| 3699 | // Nothing to do for zero characters. |
| 3700 | Label done; |
| 3701 | if (!ascii) { |
| 3702 | __ add(count, count, Operand(count), SetCC); |
| 3703 | } else { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3704 | __ cmp(count, Operand::Zero()); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3705 | } |
| 3706 | __ b(eq, &done); |
| 3707 | |
| 3708 | // Assume that you cannot read (or write) unaligned. |
| 3709 | Label byte_loop; |
| 3710 | // Must copy at least eight bytes, otherwise just do it one byte at a time. |
| 3711 | __ cmp(count, Operand(8)); |
| 3712 | __ add(count, dest, Operand(count)); |
| 3713 | Register limit = count; // Read until src equals this. |
| 3714 | __ b(lt, &byte_loop); |
| 3715 | |
| 3716 | if (!dest_always_aligned) { |
| 3717 | // Align dest by byte copying. Copies between zero and three bytes. |
| 3718 | __ and_(scratch4, dest, Operand(kReadAlignmentMask), SetCC); |
| 3719 | Label dest_aligned; |
| 3720 | __ b(eq, &dest_aligned); |
| 3721 | __ cmp(scratch4, Operand(2)); |
| 3722 | __ ldrb(scratch1, MemOperand(src, 1, PostIndex)); |
| 3723 | __ ldrb(scratch2, MemOperand(src, 1, PostIndex), le); |
| 3724 | __ ldrb(scratch3, MemOperand(src, 1, PostIndex), lt); |
| 3725 | __ strb(scratch1, MemOperand(dest, 1, PostIndex)); |
| 3726 | __ strb(scratch2, MemOperand(dest, 1, PostIndex), le); |
| 3727 | __ strb(scratch3, MemOperand(dest, 1, PostIndex), lt); |
| 3728 | __ bind(&dest_aligned); |
| 3729 | } |
| 3730 | |
| 3731 | Label simple_loop; |
| 3732 | |
| 3733 | __ sub(scratch4, dest, Operand(src)); |
| 3734 | __ and_(scratch4, scratch4, Operand(0x03), SetCC); |
| 3735 | __ b(eq, &simple_loop); |
| 3736 | // Shift register is number of bits in a source word that |
| 3737 | // must be combined with bits in the next source word in order |
| 3738 | // to create a destination word. |
| 3739 | |
| 3740 | // Complex loop for src/dst that are not aligned the same way. |
| 3741 | { |
| 3742 | Label loop; |
| 3743 | __ mov(scratch4, Operand(scratch4, LSL, 3)); |
| 3744 | Register left_shift = scratch4; |
| 3745 | __ and_(src, src, Operand(~3)); // Round down to load previous word. |
| 3746 | __ ldr(scratch1, MemOperand(src, 4, PostIndex)); |
| 3747 | // Store the "shift" most significant bits of scratch in the least |
| 3748 | // signficant bits (i.e., shift down by (32-shift)). |
| 3749 | __ rsb(scratch2, left_shift, Operand(32)); |
| 3750 | Register right_shift = scratch2; |
| 3751 | __ mov(scratch1, Operand(scratch1, LSR, right_shift)); |
| 3752 | |
| 3753 | __ bind(&loop); |
| 3754 | __ ldr(scratch3, MemOperand(src, 4, PostIndex)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3755 | __ orr(scratch1, scratch1, Operand(scratch3, LSL, left_shift)); |
| 3756 | __ str(scratch1, MemOperand(dest, 4, PostIndex)); |
| 3757 | __ mov(scratch1, Operand(scratch3, LSR, right_shift)); |
| 3758 | // Loop if four or more bytes left to copy. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3759 | __ sub(scratch3, limit, Operand(dest)); |
| 3760 | __ sub(scratch3, scratch3, Operand(4), SetCC); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3761 | __ b(ge, &loop); |
| 3762 | } |
| 3763 | // There is now between zero and three bytes left to copy (negative that |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3764 | // number is in scratch3), and between one and three bytes already read into |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3765 | // scratch1 (eight times that number in scratch4). We may have read past |
| 3766 | // the end of the string, but because objects are aligned, we have not read |
| 3767 | // past the end of the object. |
| 3768 | // Find the minimum of remaining characters to move and preloaded characters |
| 3769 | // and write those as bytes. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3770 | __ add(scratch3, scratch3, Operand(4), SetCC); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3771 | __ b(eq, &done); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3772 | __ cmp(scratch4, Operand(scratch3, LSL, 3), ne); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3773 | // Move minimum of bytes read and bytes left to copy to scratch4. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3774 | __ mov(scratch3, Operand(scratch4, LSR, 3), LeaveCC, lt); |
| 3775 | // Between one and three (value in scratch3) characters already read into |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3776 | // scratch ready to write. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3777 | __ cmp(scratch3, Operand(2)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3778 | __ strb(scratch1, MemOperand(dest, 1, PostIndex)); |
| 3779 | __ mov(scratch1, Operand(scratch1, LSR, 8), LeaveCC, ge); |
| 3780 | __ strb(scratch1, MemOperand(dest, 1, PostIndex), ge); |
| 3781 | __ mov(scratch1, Operand(scratch1, LSR, 8), LeaveCC, gt); |
| 3782 | __ strb(scratch1, MemOperand(dest, 1, PostIndex), gt); |
| 3783 | // Copy any remaining bytes. |
| 3784 | __ b(&byte_loop); |
| 3785 | |
| 3786 | // Simple loop. |
| 3787 | // Copy words from src to dst, until less than four bytes left. |
| 3788 | // Both src and dest are word aligned. |
| 3789 | __ bind(&simple_loop); |
| 3790 | { |
| 3791 | Label loop; |
| 3792 | __ bind(&loop); |
| 3793 | __ ldr(scratch1, MemOperand(src, 4, PostIndex)); |
| 3794 | __ sub(scratch3, limit, Operand(dest)); |
| 3795 | __ str(scratch1, MemOperand(dest, 4, PostIndex)); |
| 3796 | // Compare to 8, not 4, because we do the substraction before increasing |
| 3797 | // dest. |
| 3798 | __ cmp(scratch3, Operand(8)); |
| 3799 | __ b(ge, &loop); |
| 3800 | } |
| 3801 | |
| 3802 | // Copy bytes from src to dst until dst hits limit. |
| 3803 | __ bind(&byte_loop); |
| 3804 | __ cmp(dest, Operand(limit)); |
| 3805 | __ ldrb(scratch1, MemOperand(src, 1, PostIndex), lt); |
| 3806 | __ b(ge, &done); |
| 3807 | __ strb(scratch1, MemOperand(dest, 1, PostIndex)); |
| 3808 | __ b(&byte_loop); |
| 3809 | |
| 3810 | __ bind(&done); |
| 3811 | } |
| 3812 | |
| 3813 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3814 | void StringHelper::GenerateTwoCharacterStringTableProbe(MacroAssembler* masm, |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3815 | Register c1, |
| 3816 | Register c2, |
| 3817 | Register scratch1, |
| 3818 | Register scratch2, |
| 3819 | Register scratch3, |
| 3820 | Register scratch4, |
| 3821 | Register scratch5, |
| 3822 | Label* not_found) { |
| 3823 | // Register scratch3 is the general scratch register in this function. |
| 3824 | Register scratch = scratch3; |
| 3825 | |
| 3826 | // Make sure that both characters are not digits as such strings has a |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3827 | // different hash algorithm. Don't try to look for these in the string table. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3828 | Label not_array_index; |
| 3829 | __ sub(scratch, c1, Operand(static_cast<int>('0'))); |
| 3830 | __ cmp(scratch, Operand(static_cast<int>('9' - '0'))); |
| 3831 | __ b(hi, ¬_array_index); |
| 3832 | __ sub(scratch, c2, Operand(static_cast<int>('0'))); |
| 3833 | __ cmp(scratch, Operand(static_cast<int>('9' - '0'))); |
| 3834 | |
| 3835 | // If check failed combine both characters into single halfword. |
| 3836 | // This is required by the contract of the method: code at the |
| 3837 | // not_found branch expects this combination in c1 register |
| 3838 | __ orr(c1, c1, Operand(c2, LSL, kBitsPerByte), LeaveCC, ls); |
| 3839 | __ b(ls, not_found); |
| 3840 | |
| 3841 | __ bind(¬_array_index); |
| 3842 | // Calculate the two character string hash. |
| 3843 | Register hash = scratch1; |
| 3844 | StringHelper::GenerateHashInit(masm, hash, c1); |
| 3845 | StringHelper::GenerateHashAddCharacter(masm, hash, c2); |
| 3846 | StringHelper::GenerateHashGetHash(masm, hash); |
| 3847 | |
| 3848 | // Collect the two characters in a register. |
| 3849 | Register chars = c1; |
| 3850 | __ orr(chars, chars, Operand(c2, LSL, kBitsPerByte)); |
| 3851 | |
| 3852 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 3853 | // hash: hash of two character string. |
| 3854 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3855 | // Load string table |
| 3856 | // Load address of first element of the string table. |
| 3857 | Register string_table = c2; |
| 3858 | __ LoadRoot(string_table, Heap::kStringTableRootIndex); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3859 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3860 | Register undefined = scratch4; |
| 3861 | __ LoadRoot(undefined, Heap::kUndefinedValueRootIndex); |
| 3862 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3863 | // Calculate capacity mask from the string table capacity. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3864 | Register mask = scratch2; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3865 | __ ldr(mask, FieldMemOperand(string_table, StringTable::kCapacityOffset)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3866 | __ mov(mask, Operand(mask, ASR, 1)); |
| 3867 | __ sub(mask, mask, Operand(1)); |
| 3868 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3869 | // Calculate untagged address of the first element of the string table. |
| 3870 | Register first_string_table_element = string_table; |
| 3871 | __ add(first_string_table_element, string_table, |
| 3872 | Operand(StringTable::kElementsStartOffset - kHeapObjectTag)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3873 | |
| 3874 | // Registers |
| 3875 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 3876 | // hash: hash of two character string |
| 3877 | // mask: capacity mask |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3878 | // first_string_table_element: address of the first element of |
| 3879 | // the string table |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3880 | // undefined: the undefined object |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3881 | // scratch: - |
| 3882 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3883 | // Perform a number of probes in the string table. |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 3884 | const int kProbes = 4; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3885 | Label found_in_string_table; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3886 | Label next_probe[kProbes]; |
danno@chromium.org | 2c45679 | 2011-11-11 12:00:53 +0000 | [diff] [blame] | 3887 | Register candidate = scratch5; // Scratch register contains candidate. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3888 | for (int i = 0; i < kProbes; i++) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3889 | // Calculate entry in string table. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3890 | if (i > 0) { |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3891 | __ add(candidate, hash, Operand(StringTable::GetProbeOffset(i))); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3892 | } else { |
| 3893 | __ mov(candidate, hash); |
| 3894 | } |
| 3895 | |
| 3896 | __ and_(candidate, candidate, Operand(mask)); |
| 3897 | |
| 3898 | // Load the entry from the symble table. |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3899 | STATIC_ASSERT(StringTable::kEntrySize == 1); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3900 | __ ldr(candidate, |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3901 | MemOperand(first_string_table_element, |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3902 | candidate, |
| 3903 | LSL, |
| 3904 | kPointerSizeLog2)); |
| 3905 | |
| 3906 | // If entry is undefined no string with this hash can be found. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3907 | Label is_string; |
| 3908 | __ CompareObjectType(candidate, scratch, scratch, ODDBALL_TYPE); |
| 3909 | __ b(ne, &is_string); |
| 3910 | |
| 3911 | __ cmp(undefined, candidate); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3912 | __ b(eq, not_found); |
danno@chromium.org | 2c45679 | 2011-11-11 12:00:53 +0000 | [diff] [blame] | 3913 | // Must be the hole (deleted entry). |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3914 | if (FLAG_debug_code) { |
danno@chromium.org | 2c45679 | 2011-11-11 12:00:53 +0000 | [diff] [blame] | 3915 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3916 | __ cmp(ip, candidate); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3917 | __ Assert(eq, kOddballInStringTableIsNotUndefinedOrTheHole); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3918 | } |
| 3919 | __ jmp(&next_probe[i]); |
| 3920 | |
| 3921 | __ bind(&is_string); |
| 3922 | |
| 3923 | // Check that the candidate is a non-external ASCII string. The instance |
| 3924 | // type is still in the scratch register from the CompareObjectType |
| 3925 | // operation. |
| 3926 | __ JumpIfInstanceTypeIsNotSequentialAscii(scratch, scratch, &next_probe[i]); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3927 | |
| 3928 | // If length is not 2 the string is not a candidate. |
| 3929 | __ ldr(scratch, FieldMemOperand(candidate, String::kLengthOffset)); |
| 3930 | __ cmp(scratch, Operand(Smi::FromInt(2))); |
| 3931 | __ b(ne, &next_probe[i]); |
| 3932 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3933 | // Check if the two characters match. |
| 3934 | // Assumes that word load is little endian. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 3935 | __ ldrh(scratch, FieldMemOperand(candidate, SeqOneByteString::kHeaderSize)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3936 | __ cmp(chars, scratch); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3937 | __ b(eq, &found_in_string_table); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3938 | __ bind(&next_probe[i]); |
| 3939 | } |
| 3940 | |
| 3941 | // No matching 2 character string found by probing. |
| 3942 | __ jmp(not_found); |
| 3943 | |
| 3944 | // Scratch register contains result when we fall through to here. |
danno@chromium.org | 2c45679 | 2011-11-11 12:00:53 +0000 | [diff] [blame] | 3945 | Register result = candidate; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 3946 | __ bind(&found_in_string_table); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3947 | __ Move(r0, result); |
| 3948 | } |
| 3949 | |
| 3950 | |
| 3951 | void StringHelper::GenerateHashInit(MacroAssembler* masm, |
| 3952 | Register hash, |
| 3953 | Register character) { |
| 3954 | // hash = character + (character << 10); |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 3955 | __ LoadRoot(hash, Heap::kHashSeedRootIndex); |
rossberg@chromium.org | fab1498 | 2012-01-05 15:02:15 +0000 | [diff] [blame] | 3956 | // Untag smi seed and add the character. |
| 3957 | __ add(hash, character, Operand(hash, LSR, kSmiTagSize)); |
| 3958 | // hash += hash << 10; |
| 3959 | __ add(hash, hash, Operand(hash, LSL, 10)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3960 | // hash ^= hash >> 6; |
danno@chromium.org | 2c45679 | 2011-11-11 12:00:53 +0000 | [diff] [blame] | 3961 | __ eor(hash, hash, Operand(hash, LSR, 6)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3962 | } |
| 3963 | |
| 3964 | |
| 3965 | void StringHelper::GenerateHashAddCharacter(MacroAssembler* masm, |
| 3966 | Register hash, |
| 3967 | Register character) { |
| 3968 | // hash += character; |
| 3969 | __ add(hash, hash, Operand(character)); |
| 3970 | // hash += hash << 10; |
| 3971 | __ add(hash, hash, Operand(hash, LSL, 10)); |
| 3972 | // hash ^= hash >> 6; |
danno@chromium.org | 2c45679 | 2011-11-11 12:00:53 +0000 | [diff] [blame] | 3973 | __ eor(hash, hash, Operand(hash, LSR, 6)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3974 | } |
| 3975 | |
| 3976 | |
| 3977 | void StringHelper::GenerateHashGetHash(MacroAssembler* masm, |
| 3978 | Register hash) { |
| 3979 | // hash += hash << 3; |
| 3980 | __ add(hash, hash, Operand(hash, LSL, 3)); |
| 3981 | // hash ^= hash >> 11; |
danno@chromium.org | 2c45679 | 2011-11-11 12:00:53 +0000 | [diff] [blame] | 3982 | __ eor(hash, hash, Operand(hash, LSR, 11)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3983 | // hash += hash << 15; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 3984 | __ add(hash, hash, Operand(hash, LSL, 15)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3985 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 3986 | __ and_(hash, hash, Operand(String::kHashBitMask), SetCC); |
danno@chromium.org | 2c45679 | 2011-11-11 12:00:53 +0000 | [diff] [blame] | 3987 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3988 | // if (hash == 0) hash = 27; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 3989 | __ mov(hash, Operand(StringHasher::kZeroHash), LeaveCC, eq); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3990 | } |
| 3991 | |
| 3992 | |
| 3993 | void SubStringStub::Generate(MacroAssembler* masm) { |
| 3994 | Label runtime; |
| 3995 | |
| 3996 | // Stack frame on entry. |
| 3997 | // lr: return address |
| 3998 | // sp[0]: to |
| 3999 | // sp[4]: from |
| 4000 | // sp[8]: string |
| 4001 | |
| 4002 | // This stub is called from the native-call %_SubString(...), so |
| 4003 | // nothing can be assumed about the arguments. It is tested that: |
| 4004 | // "string" is a sequential string, |
| 4005 | // both "from" and "to" are smis, and |
| 4006 | // 0 <= from <= to <= string.length. |
| 4007 | // If any of these assumptions fail, we call the runtime system. |
| 4008 | |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 4009 | const int kToOffset = 0 * kPointerSize; |
| 4010 | const int kFromOffset = 1 * kPointerSize; |
| 4011 | const int kStringOffset = 2 * kPointerSize; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4012 | |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4013 | __ Ldrd(r2, r3, MemOperand(sp, kToOffset)); |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 4014 | STATIC_ASSERT(kFromOffset == kToOffset + 4); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4015 | STATIC_ASSERT(kSmiTag == 0); |
| 4016 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 4017 | |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 4018 | // Arithmetic shift right by one un-smi-tags. In this case we rotate right |
| 4019 | // instead because we bail out on non-smi values: ROR and ASR are equivalent |
| 4020 | // for smis but they set the flags in a way that's easier to optimize. |
| 4021 | __ mov(r2, Operand(r2, ROR, 1), SetCC); |
| 4022 | __ mov(r3, Operand(r3, ROR, 1), SetCC, cc); |
| 4023 | // If either to or from had the smi tag bit set, then C is set now, and N |
| 4024 | // has the same value: we rotated by 1, so the bottom bit is now the top bit. |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4025 | // We want to bailout to runtime here if From is negative. In that case, the |
| 4026 | // next instruction is not executed and we fall through to bailing out to |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 4027 | // runtime. |
| 4028 | // Executed if both r2 and r3 are untagged integers. |
| 4029 | __ sub(r2, r2, Operand(r3), SetCC, cc); |
| 4030 | // One of the above un-smis or the above SUB could have set N==1. |
| 4031 | __ b(mi, &runtime); // Either "from" or "to" is not an smi, or from > to. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4032 | |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4033 | // Make sure first argument is a string. |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 4034 | __ ldr(r0, MemOperand(sp, kStringOffset)); |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 4035 | // Do a JumpIfSmi, but fold its jump into the subsequent string test. |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 4036 | __ SmiTst(r0); |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 4037 | Condition is_string = masm->IsObjectStringType(r0, r1, ne); |
| 4038 | ASSERT(is_string == eq); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4039 | __ b(NegateCondition(is_string), &runtime); |
| 4040 | |
ulan@chromium.org | 2e04b58 | 2013-02-21 14:06:02 +0000 | [diff] [blame] | 4041 | Label single_char; |
| 4042 | __ cmp(r2, Operand(1)); |
| 4043 | __ b(eq, &single_char); |
| 4044 | |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 4045 | // Short-cut for the case of trivial substring. |
| 4046 | Label return_r0; |
| 4047 | // r0: original string |
| 4048 | // r2: result string length |
| 4049 | __ ldr(r4, FieldMemOperand(r0, String::kLengthOffset)); |
| 4050 | __ cmp(r2, Operand(r4, ASR, 1)); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 4051 | // Return original string. |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 4052 | __ b(eq, &return_r0); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 4053 | // Longer than original string's length or negative: unsafe arguments. |
| 4054 | __ b(hi, &runtime); |
| 4055 | // Shorter than original string's length: an actual substring. |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 4056 | |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4057 | // Deal with different string types: update the index if necessary |
| 4058 | // and put the underlying string into r5. |
| 4059 | // r0: original string |
| 4060 | // r1: instance type |
| 4061 | // r2: length |
| 4062 | // r3: from index (untagged) |
| 4063 | Label underlying_unpacked, sliced_string, seq_or_external_string; |
| 4064 | // If the string is not indirect, it can only be sequential or external. |
| 4065 | STATIC_ASSERT(kIsIndirectStringMask == (kSlicedStringTag & kConsStringTag)); |
| 4066 | STATIC_ASSERT(kIsIndirectStringMask != 0); |
| 4067 | __ tst(r1, Operand(kIsIndirectStringMask)); |
| 4068 | __ b(eq, &seq_or_external_string); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4069 | |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4070 | __ tst(r1, Operand(kSlicedNotConsMask)); |
| 4071 | __ b(ne, &sliced_string); |
| 4072 | // Cons string. Check whether it is flat, then fetch first part. |
| 4073 | __ ldr(r5, FieldMemOperand(r0, ConsString::kSecondOffset)); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4074 | __ CompareRoot(r5, Heap::kempty_stringRootIndex); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4075 | __ b(ne, &runtime); |
| 4076 | __ ldr(r5, FieldMemOperand(r0, ConsString::kFirstOffset)); |
| 4077 | // Update instance type. |
| 4078 | __ ldr(r1, FieldMemOperand(r5, HeapObject::kMapOffset)); |
| 4079 | __ ldrb(r1, FieldMemOperand(r1, Map::kInstanceTypeOffset)); |
| 4080 | __ jmp(&underlying_unpacked); |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 4081 | |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4082 | __ bind(&sliced_string); |
| 4083 | // Sliced string. Fetch parent and correct start index by offset. |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4084 | __ ldr(r5, FieldMemOperand(r0, SlicedString::kParentOffset)); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 4085 | __ ldr(r4, FieldMemOperand(r0, SlicedString::kOffsetOffset)); |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4086 | __ add(r3, r3, Operand(r4, ASR, 1)); // Add offset to index. |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4087 | // Update instance type. |
| 4088 | __ ldr(r1, FieldMemOperand(r5, HeapObject::kMapOffset)); |
| 4089 | __ ldrb(r1, FieldMemOperand(r1, Map::kInstanceTypeOffset)); |
| 4090 | __ jmp(&underlying_unpacked); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4091 | |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4092 | __ bind(&seq_or_external_string); |
| 4093 | // Sequential or external string. Just move string to the expected register. |
| 4094 | __ mov(r5, r0); |
| 4095 | |
| 4096 | __ bind(&underlying_unpacked); |
| 4097 | |
| 4098 | if (FLAG_string_slices) { |
| 4099 | Label copy_routine; |
| 4100 | // r5: underlying subject string |
| 4101 | // r1: instance type of underlying subject string |
| 4102 | // r2: length |
| 4103 | // r3: adjusted start index (untagged) |
| 4104 | __ cmp(r2, Operand(SlicedString::kMinLength)); |
| 4105 | // Short slice. Copy instead of slicing. |
| 4106 | __ b(lt, ©_routine); |
| 4107 | // Allocate new sliced string. At this point we do not reload the instance |
| 4108 | // type including the string encoding because we simply rely on the info |
| 4109 | // provided by the original string. It does not matter if the original |
| 4110 | // string's encoding is wrong because we always have to recheck encoding of |
| 4111 | // the newly created string's parent anyways due to externalized strings. |
| 4112 | Label two_byte_slice, set_slice_header; |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 4113 | STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4114 | STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0); |
| 4115 | __ tst(r1, Operand(kStringEncodingMask)); |
| 4116 | __ b(eq, &two_byte_slice); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4117 | __ AllocateAsciiSlicedString(r0, r2, r6, r4, &runtime); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4118 | __ jmp(&set_slice_header); |
| 4119 | __ bind(&two_byte_slice); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4120 | __ AllocateTwoByteSlicedString(r0, r2, r6, r4, &runtime); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4121 | __ bind(&set_slice_header); |
| 4122 | __ mov(r3, Operand(r3, LSL, 1)); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4123 | __ str(r5, FieldMemOperand(r0, SlicedString::kParentOffset)); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 4124 | __ str(r3, FieldMemOperand(r0, SlicedString::kOffsetOffset)); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4125 | __ jmp(&return_r0); |
| 4126 | |
| 4127 | __ bind(©_routine); |
| 4128 | } |
| 4129 | |
| 4130 | // r5: underlying subject string |
| 4131 | // r1: instance type of underlying subject string |
| 4132 | // r2: length |
| 4133 | // r3: adjusted start index (untagged) |
| 4134 | Label two_byte_sequential, sequential_string, allocate_result; |
| 4135 | STATIC_ASSERT(kExternalStringTag != 0); |
| 4136 | STATIC_ASSERT(kSeqStringTag == 0); |
| 4137 | __ tst(r1, Operand(kExternalStringTag)); |
| 4138 | __ b(eq, &sequential_string); |
| 4139 | |
| 4140 | // Handle external string. |
| 4141 | // Rule out short external strings. |
| 4142 | STATIC_CHECK(kShortExternalStringTag != 0); |
| 4143 | __ tst(r1, Operand(kShortExternalStringTag)); |
| 4144 | __ b(ne, &runtime); |
| 4145 | __ ldr(r5, FieldMemOperand(r5, ExternalString::kResourceDataOffset)); |
| 4146 | // r5 already points to the first character of underlying string. |
| 4147 | __ jmp(&allocate_result); |
| 4148 | |
| 4149 | __ bind(&sequential_string); |
| 4150 | // Locate first character of underlying subject string. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4151 | STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
| 4152 | __ add(r5, r5, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4153 | |
| 4154 | __ bind(&allocate_result); |
| 4155 | // Sequential acii string. Allocate the result. |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 4156 | STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4157 | __ tst(r1, Operand(kStringEncodingMask)); |
| 4158 | __ b(eq, &two_byte_sequential); |
| 4159 | |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 4160 | // Allocate and copy the resulting ASCII string. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4161 | __ AllocateAsciiString(r0, r2, r4, r6, r1, &runtime); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4162 | |
| 4163 | // Locate first character of substring to copy. |
| 4164 | __ add(r5, r5, r3); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4165 | // Locate first character of result. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4166 | __ add(r1, r0, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4167 | |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 4168 | // r0: result string |
| 4169 | // r1: first character of result string |
| 4170 | // r2: result string length |
| 4171 | // r5: first character of substring to copy |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4172 | STATIC_ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4173 | StringHelper::GenerateCopyCharactersLong(masm, r1, r5, r2, r3, r4, r6, r9, |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4174 | COPY_ASCII | DEST_ALWAYS_ALIGNED); |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 4175 | __ jmp(&return_r0); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4176 | |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4177 | // Allocate and copy the resulting two-byte string. |
| 4178 | __ bind(&two_byte_sequential); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4179 | __ AllocateTwoByteString(r0, r2, r4, r6, r1, &runtime); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4180 | |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4181 | // Locate first character of substring to copy. |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 4182 | STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4183 | __ add(r5, r5, Operand(r3, LSL, 1)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4184 | // Locate first character of result. |
| 4185 | __ add(r1, r0, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 4186 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4187 | // r0: result string. |
| 4188 | // r1: first character of result. |
| 4189 | // r2: result length. |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 4190 | // r5: first character of substring to copy. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4191 | STATIC_ASSERT((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 4192 | StringHelper::GenerateCopyCharactersLong( |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4193 | masm, r1, r5, r2, r3, r4, r6, r9, DEST_ALWAYS_ALIGNED); |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 4194 | |
| 4195 | __ bind(&return_r0); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4196 | Counters* counters = masm->isolate()->counters(); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 4197 | __ IncrementCounter(counters->sub_string_native(), 1, r3, r4); |
ulan@chromium.org | 2e04b58 | 2013-02-21 14:06:02 +0000 | [diff] [blame] | 4198 | __ Drop(3); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4199 | __ Ret(); |
| 4200 | |
| 4201 | // Just jump to runtime to create the sub string. |
| 4202 | __ bind(&runtime); |
| 4203 | __ TailCallRuntime(Runtime::kSubString, 3, 1); |
ulan@chromium.org | 2e04b58 | 2013-02-21 14:06:02 +0000 | [diff] [blame] | 4204 | |
| 4205 | __ bind(&single_char); |
| 4206 | // r0: original string |
| 4207 | // r1: instance type |
| 4208 | // r2: length |
| 4209 | // r3: from index (untagged) |
| 4210 | __ SmiTag(r3, r3); |
| 4211 | StringCharAtGenerator generator( |
| 4212 | r0, r3, r2, r0, &runtime, &runtime, &runtime, STRING_INDEX_IS_NUMBER); |
| 4213 | generator.GenerateFast(masm); |
| 4214 | __ Drop(3); |
| 4215 | __ Ret(); |
| 4216 | generator.SkipSlow(masm, &runtime); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4217 | } |
| 4218 | |
| 4219 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4220 | void StringCompareStub::GenerateFlatAsciiStringEquals(MacroAssembler* masm, |
| 4221 | Register left, |
| 4222 | Register right, |
| 4223 | Register scratch1, |
| 4224 | Register scratch2, |
| 4225 | Register scratch3) { |
| 4226 | Register length = scratch1; |
| 4227 | |
| 4228 | // Compare lengths. |
| 4229 | Label strings_not_equal, check_zero_length; |
| 4230 | __ ldr(length, FieldMemOperand(left, String::kLengthOffset)); |
| 4231 | __ ldr(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| 4232 | __ cmp(length, scratch2); |
| 4233 | __ b(eq, &check_zero_length); |
| 4234 | __ bind(&strings_not_equal); |
| 4235 | __ mov(r0, Operand(Smi::FromInt(NOT_EQUAL))); |
| 4236 | __ Ret(); |
| 4237 | |
| 4238 | // Check if the length is zero. |
| 4239 | Label compare_chars; |
| 4240 | __ bind(&check_zero_length); |
| 4241 | STATIC_ASSERT(kSmiTag == 0); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 4242 | __ cmp(length, Operand::Zero()); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4243 | __ b(ne, &compare_chars); |
| 4244 | __ mov(r0, Operand(Smi::FromInt(EQUAL))); |
| 4245 | __ Ret(); |
| 4246 | |
| 4247 | // Compare characters. |
| 4248 | __ bind(&compare_chars); |
| 4249 | GenerateAsciiCharsCompareLoop(masm, |
| 4250 | left, right, length, scratch2, scratch3, |
| 4251 | &strings_not_equal); |
| 4252 | |
| 4253 | // Characters are equal. |
| 4254 | __ mov(r0, Operand(Smi::FromInt(EQUAL))); |
| 4255 | __ Ret(); |
| 4256 | } |
| 4257 | |
| 4258 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4259 | void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm, |
| 4260 | Register left, |
| 4261 | Register right, |
| 4262 | Register scratch1, |
| 4263 | Register scratch2, |
| 4264 | Register scratch3, |
| 4265 | Register scratch4) { |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4266 | Label result_not_equal, compare_lengths; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4267 | // Find minimum length and length difference. |
| 4268 | __ ldr(scratch1, FieldMemOperand(left, String::kLengthOffset)); |
| 4269 | __ ldr(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| 4270 | __ sub(scratch3, scratch1, Operand(scratch2), SetCC); |
| 4271 | Register length_delta = scratch3; |
| 4272 | __ mov(scratch1, scratch2, LeaveCC, gt); |
| 4273 | Register min_length = scratch1; |
| 4274 | STATIC_ASSERT(kSmiTag == 0); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 4275 | __ cmp(min_length, Operand::Zero()); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4276 | __ b(eq, &compare_lengths); |
| 4277 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4278 | // Compare loop. |
| 4279 | GenerateAsciiCharsCompareLoop(masm, |
| 4280 | left, right, min_length, scratch2, scratch4, |
| 4281 | &result_not_equal); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4282 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4283 | // Compare lengths - strings up to min-length are equal. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4284 | __ bind(&compare_lengths); |
| 4285 | ASSERT(Smi::FromInt(EQUAL) == static_cast<Smi*>(0)); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4286 | // Use length_delta as result if it's zero. |
| 4287 | __ mov(r0, Operand(length_delta), SetCC); |
| 4288 | __ bind(&result_not_equal); |
| 4289 | // Conditionally update the result based either on length_delta or |
| 4290 | // the last comparion performed in the loop above. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4291 | __ mov(r0, Operand(Smi::FromInt(GREATER)), LeaveCC, gt); |
| 4292 | __ mov(r0, Operand(Smi::FromInt(LESS)), LeaveCC, lt); |
| 4293 | __ Ret(); |
| 4294 | } |
| 4295 | |
| 4296 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4297 | void StringCompareStub::GenerateAsciiCharsCompareLoop( |
| 4298 | MacroAssembler* masm, |
| 4299 | Register left, |
| 4300 | Register right, |
| 4301 | Register length, |
| 4302 | Register scratch1, |
| 4303 | Register scratch2, |
| 4304 | Label* chars_not_equal) { |
| 4305 | // Change index to run from -length to -1 by adding length to string |
| 4306 | // start. This means that loop ends when index reaches zero, which |
| 4307 | // doesn't need an additional compare. |
| 4308 | __ SmiUntag(length); |
| 4309 | __ add(scratch1, length, |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4310 | Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4311 | __ add(left, left, Operand(scratch1)); |
| 4312 | __ add(right, right, Operand(scratch1)); |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 4313 | __ rsb(length, length, Operand::Zero()); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4314 | Register index = length; // index = -length; |
| 4315 | |
| 4316 | // Compare loop. |
| 4317 | Label loop; |
| 4318 | __ bind(&loop); |
| 4319 | __ ldrb(scratch1, MemOperand(left, index)); |
| 4320 | __ ldrb(scratch2, MemOperand(right, index)); |
| 4321 | __ cmp(scratch1, scratch2); |
| 4322 | __ b(ne, chars_not_equal); |
| 4323 | __ add(index, index, Operand(1), SetCC); |
| 4324 | __ b(ne, &loop); |
| 4325 | } |
| 4326 | |
| 4327 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4328 | void StringCompareStub::Generate(MacroAssembler* masm) { |
| 4329 | Label runtime; |
| 4330 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 4331 | Counters* counters = masm->isolate()->counters(); |
| 4332 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4333 | // Stack frame on entry. |
| 4334 | // sp[0]: right string |
| 4335 | // sp[4]: left string |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 4336 | __ Ldrd(r0 , r1, MemOperand(sp)); // Load right in r0, left in r1. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4337 | |
| 4338 | Label not_same; |
| 4339 | __ cmp(r0, r1); |
| 4340 | __ b(ne, ¬_same); |
| 4341 | STATIC_ASSERT(EQUAL == 0); |
| 4342 | STATIC_ASSERT(kSmiTag == 0); |
| 4343 | __ mov(r0, Operand(Smi::FromInt(EQUAL))); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 4344 | __ IncrementCounter(counters->string_compare_native(), 1, r1, r2); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4345 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 4346 | __ Ret(); |
| 4347 | |
| 4348 | __ bind(¬_same); |
| 4349 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 4350 | // Check that both objects are sequential ASCII strings. |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 4351 | __ JumpIfNotBothSequentialAsciiStrings(r1, r0, r2, r3, &runtime); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4352 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 4353 | // Compare flat ASCII strings natively. Remove arguments from stack first. |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 4354 | __ IncrementCounter(counters->string_compare_native(), 1, r2, r3); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4355 | __ add(sp, sp, Operand(2 * kPointerSize)); |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 4356 | GenerateCompareFlatAsciiStrings(masm, r1, r0, r2, r3, r4, r5); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4357 | |
| 4358 | // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater) |
| 4359 | // tagged as a small integer. |
| 4360 | __ bind(&runtime); |
| 4361 | __ TailCallRuntime(Runtime::kStringCompare, 2, 1); |
| 4362 | } |
| 4363 | |
| 4364 | |
| 4365 | void StringAddStub::Generate(MacroAssembler* masm) { |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4366 | Label call_runtime, call_builtin; |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 4367 | Builtins::JavaScript builtin_id = Builtins::ADD; |
| 4368 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 4369 | Counters* counters = masm->isolate()->counters(); |
| 4370 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4371 | // Stack on entry: |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 4372 | // sp[0]: second argument (right). |
| 4373 | // sp[4]: first argument (left). |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4374 | |
| 4375 | // Load the two arguments. |
| 4376 | __ ldr(r0, MemOperand(sp, 1 * kPointerSize)); // First argument. |
| 4377 | __ ldr(r1, MemOperand(sp, 0 * kPointerSize)); // Second argument. |
| 4378 | |
| 4379 | // Make sure that both arguments are strings if not known in advance. |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4380 | // Otherwise, at least one of the arguments is definitely a string, |
| 4381 | // and we convert the one that is not known to be a string. |
| 4382 | if ((flags_ & STRING_ADD_CHECK_BOTH) == STRING_ADD_CHECK_BOTH) { |
| 4383 | ASSERT((flags_ & STRING_ADD_CHECK_LEFT) == STRING_ADD_CHECK_LEFT); |
| 4384 | ASSERT((flags_ & STRING_ADD_CHECK_RIGHT) == STRING_ADD_CHECK_RIGHT); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4385 | __ JumpIfEitherSmi(r0, r1, &call_runtime); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4386 | // Load instance types. |
| 4387 | __ ldr(r4, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 4388 | __ ldr(r5, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 4389 | __ ldrb(r4, FieldMemOperand(r4, Map::kInstanceTypeOffset)); |
| 4390 | __ ldrb(r5, FieldMemOperand(r5, Map::kInstanceTypeOffset)); |
| 4391 | STATIC_ASSERT(kStringTag == 0); |
| 4392 | // If either is not a string, go to runtime. |
| 4393 | __ tst(r4, Operand(kIsNotStringMask)); |
| 4394 | __ tst(r5, Operand(kIsNotStringMask), eq); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4395 | __ b(ne, &call_runtime); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4396 | } else if ((flags_ & STRING_ADD_CHECK_LEFT) == STRING_ADD_CHECK_LEFT) { |
| 4397 | ASSERT((flags_ & STRING_ADD_CHECK_RIGHT) == 0); |
| 4398 | GenerateConvertArgument( |
| 4399 | masm, 1 * kPointerSize, r0, r2, r3, r4, r5, &call_builtin); |
| 4400 | builtin_id = Builtins::STRING_ADD_RIGHT; |
| 4401 | } else if ((flags_ & STRING_ADD_CHECK_RIGHT) == STRING_ADD_CHECK_RIGHT) { |
| 4402 | ASSERT((flags_ & STRING_ADD_CHECK_LEFT) == 0); |
| 4403 | GenerateConvertArgument( |
| 4404 | masm, 0 * kPointerSize, r1, r2, r3, r4, r5, &call_builtin); |
| 4405 | builtin_id = Builtins::STRING_ADD_LEFT; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4406 | } |
| 4407 | |
| 4408 | // Both arguments are strings. |
| 4409 | // r0: first string |
| 4410 | // r1: second string |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 4411 | // r4: first string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
| 4412 | // r5: second string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4413 | { |
| 4414 | Label strings_not_empty; |
| 4415 | // Check if either of the strings are empty. In that case return the other. |
| 4416 | __ ldr(r2, FieldMemOperand(r0, String::kLengthOffset)); |
| 4417 | __ ldr(r3, FieldMemOperand(r1, String::kLengthOffset)); |
| 4418 | STATIC_ASSERT(kSmiTag == 0); |
| 4419 | __ cmp(r2, Operand(Smi::FromInt(0))); // Test if first string is empty. |
| 4420 | __ mov(r0, Operand(r1), LeaveCC, eq); // If first is empty, return second. |
| 4421 | STATIC_ASSERT(kSmiTag == 0); |
| 4422 | // Else test if second string is empty. |
| 4423 | __ cmp(r3, Operand(Smi::FromInt(0)), ne); |
| 4424 | __ b(ne, &strings_not_empty); // If either string was empty, return r0. |
| 4425 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 4426 | __ IncrementCounter(counters->string_add_native(), 1, r2, r3); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4427 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 4428 | __ Ret(); |
| 4429 | |
| 4430 | __ bind(&strings_not_empty); |
| 4431 | } |
| 4432 | |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 4433 | __ SmiUntag(r2); |
| 4434 | __ SmiUntag(r3); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4435 | // Both strings are non-empty. |
| 4436 | // r0: first string |
| 4437 | // r1: second string |
| 4438 | // r2: length of first string |
| 4439 | // r3: length of second string |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 4440 | // r4: first string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
| 4441 | // r5: second string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4442 | // Look at the length of the result of adding the two strings. |
| 4443 | Label string_add_flat_result, longer_than_two; |
| 4444 | // Adding two lengths can't overflow. |
| 4445 | STATIC_ASSERT(String::kMaxLength < String::kMaxLength * 2); |
| 4446 | __ add(r6, r2, Operand(r3)); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4447 | // Use the string table when adding two one character strings, as it |
| 4448 | // helps later optimizations to return a string here. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4449 | __ cmp(r6, Operand(2)); |
| 4450 | __ b(ne, &longer_than_two); |
| 4451 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 4452 | // Check that both strings are non-external ASCII strings. |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4453 | if ((flags_ & STRING_ADD_CHECK_BOTH) != STRING_ADD_CHECK_BOTH) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4454 | __ ldr(r4, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 4455 | __ ldr(r5, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 4456 | __ ldrb(r4, FieldMemOperand(r4, Map::kInstanceTypeOffset)); |
| 4457 | __ ldrb(r5, FieldMemOperand(r5, Map::kInstanceTypeOffset)); |
| 4458 | } |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4459 | __ JumpIfBothInstanceTypesAreNotSequentialAscii(r4, r5, r6, r3, |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4460 | &call_runtime); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4461 | |
| 4462 | // Get the two characters forming the sub string. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4463 | __ ldrb(r2, FieldMemOperand(r0, SeqOneByteString::kHeaderSize)); |
| 4464 | __ ldrb(r3, FieldMemOperand(r1, SeqOneByteString::kHeaderSize)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4465 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4466 | // Try to lookup two character string in string table. If it is not found |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4467 | // just allocate a new one. |
| 4468 | Label make_two_character_string; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4469 | StringHelper::GenerateTwoCharacterStringTableProbe( |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4470 | masm, r2, r3, r6, r0, r4, r5, r9, &make_two_character_string); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 4471 | __ IncrementCounter(counters->string_add_native(), 1, r2, r3); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4472 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 4473 | __ Ret(); |
| 4474 | |
| 4475 | __ bind(&make_two_character_string); |
| 4476 | // Resulting string has length 2 and first chars of two strings |
| 4477 | // are combined into single halfword in r2 register. |
| 4478 | // So we can fill resulting string without two loops by a single |
| 4479 | // halfword store instruction (which assumes that processor is |
| 4480 | // in a little endian mode) |
| 4481 | __ mov(r6, Operand(2)); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4482 | __ AllocateAsciiString(r0, r6, r4, r5, r9, &call_runtime); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4483 | __ strh(r2, FieldMemOperand(r0, SeqOneByteString::kHeaderSize)); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 4484 | __ IncrementCounter(counters->string_add_native(), 1, r2, r3); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4485 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 4486 | __ Ret(); |
| 4487 | |
| 4488 | __ bind(&longer_than_two); |
| 4489 | // Check if resulting string will be flat. |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 4490 | __ cmp(r6, Operand(ConsString::kMinLength)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4491 | __ b(lt, &string_add_flat_result); |
| 4492 | // Handle exceptionally long strings in the runtime system. |
| 4493 | STATIC_ASSERT((String::kMaxLength & 0x80000000) == 0); |
| 4494 | ASSERT(IsPowerOf2(String::kMaxLength + 1)); |
| 4495 | // kMaxLength + 1 is representable as shifted literal, kMaxLength is not. |
| 4496 | __ cmp(r6, Operand(String::kMaxLength + 1)); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4497 | __ b(hs, &call_runtime); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4498 | |
| 4499 | // If result is not supposed to be flat, allocate a cons string object. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 4500 | // If both strings are ASCII the result is an ASCII cons string. |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4501 | if ((flags_ & STRING_ADD_CHECK_BOTH) != STRING_ADD_CHECK_BOTH) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4502 | __ ldr(r4, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 4503 | __ ldr(r5, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 4504 | __ ldrb(r4, FieldMemOperand(r4, Map::kInstanceTypeOffset)); |
| 4505 | __ ldrb(r5, FieldMemOperand(r5, Map::kInstanceTypeOffset)); |
| 4506 | } |
| 4507 | Label non_ascii, allocated, ascii_data; |
| 4508 | STATIC_ASSERT(kTwoByteStringTag == 0); |
| 4509 | __ tst(r4, Operand(kStringEncodingMask)); |
| 4510 | __ tst(r5, Operand(kStringEncodingMask), ne); |
| 4511 | __ b(eq, &non_ascii); |
| 4512 | |
| 4513 | // Allocate an ASCII cons string. |
| 4514 | __ bind(&ascii_data); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4515 | __ AllocateAsciiConsString(r3, r6, r4, r5, &call_runtime); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4516 | __ bind(&allocated); |
| 4517 | // Fill the fields of the cons string. |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 4518 | Label skip_write_barrier, after_writing; |
| 4519 | ExternalReference high_promotion_mode = ExternalReference:: |
| 4520 | new_space_high_promotion_mode_active_address(masm->isolate()); |
| 4521 | __ mov(r4, Operand(high_promotion_mode)); |
| 4522 | __ ldr(r4, MemOperand(r4, 0)); |
| 4523 | __ cmp(r4, Operand::Zero()); |
| 4524 | __ b(eq, &skip_write_barrier); |
| 4525 | |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4526 | __ str(r0, FieldMemOperand(r3, ConsString::kFirstOffset)); |
| 4527 | __ RecordWriteField(r3, |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 4528 | ConsString::kFirstOffset, |
| 4529 | r0, |
| 4530 | r4, |
| 4531 | kLRHasNotBeenSaved, |
| 4532 | kDontSaveFPRegs); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4533 | __ str(r1, FieldMemOperand(r3, ConsString::kSecondOffset)); |
| 4534 | __ RecordWriteField(r3, |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 4535 | ConsString::kSecondOffset, |
| 4536 | r1, |
| 4537 | r4, |
| 4538 | kLRHasNotBeenSaved, |
| 4539 | kDontSaveFPRegs); |
| 4540 | __ jmp(&after_writing); |
| 4541 | |
| 4542 | __ bind(&skip_write_barrier); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4543 | __ str(r0, FieldMemOperand(r3, ConsString::kFirstOffset)); |
| 4544 | __ str(r1, FieldMemOperand(r3, ConsString::kSecondOffset)); |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 4545 | |
| 4546 | __ bind(&after_writing); |
| 4547 | |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4548 | __ mov(r0, Operand(r3)); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 4549 | __ IncrementCounter(counters->string_add_native(), 1, r2, r3); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4550 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 4551 | __ Ret(); |
| 4552 | |
| 4553 | __ bind(&non_ascii); |
| 4554 | // At least one of the strings is two-byte. Check whether it happens |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 4555 | // to contain only one byte characters. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4556 | // r4: first instance type. |
| 4557 | // r5: second instance type. |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 4558 | __ tst(r4, Operand(kOneByteDataHintMask)); |
| 4559 | __ tst(r5, Operand(kOneByteDataHintMask), ne); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4560 | __ b(ne, &ascii_data); |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 4561 | __ eor(r4, r4, Operand(r5)); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 4562 | STATIC_ASSERT(kOneByteStringTag != 0 && kOneByteDataHintTag != 0); |
| 4563 | __ and_(r4, r4, Operand(kOneByteStringTag | kOneByteDataHintTag)); |
| 4564 | __ cmp(r4, Operand(kOneByteStringTag | kOneByteDataHintTag)); |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 4565 | __ b(eq, &ascii_data); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4566 | |
| 4567 | // Allocate a two byte cons string. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4568 | __ AllocateTwoByteConsString(r3, r6, r4, r5, &call_runtime); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4569 | __ jmp(&allocated); |
| 4570 | |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4571 | // We cannot encounter sliced strings or cons strings here since: |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 4572 | STATIC_ASSERT(SlicedString::kMinLength >= ConsString::kMinLength); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4573 | // Handle creating a flat result from either external or sequential strings. |
| 4574 | // Locate the first characters' locations. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4575 | // r0: first string |
| 4576 | // r1: second string |
| 4577 | // r2: length of first string |
| 4578 | // r3: length of second string |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 4579 | // r4: first string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
| 4580 | // r5: second string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4581 | // r6: sum of lengths. |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4582 | Label first_prepared, second_prepared; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4583 | __ bind(&string_add_flat_result); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4584 | if ((flags_ & STRING_ADD_CHECK_BOTH) != STRING_ADD_CHECK_BOTH) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4585 | __ ldr(r4, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 4586 | __ ldr(r5, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 4587 | __ ldrb(r4, FieldMemOperand(r4, Map::kInstanceTypeOffset)); |
| 4588 | __ ldrb(r5, FieldMemOperand(r5, Map::kInstanceTypeOffset)); |
| 4589 | } |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4590 | |
| 4591 | // Check whether both strings have same encoding |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4592 | __ eor(ip, r4, Operand(r5)); |
| 4593 | ASSERT(__ ImmediateFitsAddrMode1Instruction(kStringEncodingMask)); |
| 4594 | __ tst(ip, Operand(kStringEncodingMask)); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4595 | __ b(ne, &call_runtime); |
| 4596 | |
| 4597 | STATIC_ASSERT(kSeqStringTag == 0); |
| 4598 | __ tst(r4, Operand(kStringRepresentationMask)); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4599 | STATIC_ASSERT(SeqOneByteString::kHeaderSize == SeqTwoByteString::kHeaderSize); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4600 | __ add(r6, |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4601 | r0, |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4602 | Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag), |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4603 | LeaveCC, |
| 4604 | eq); |
| 4605 | __ b(eq, &first_prepared); |
| 4606 | // External string: rule out short external string and load string resource. |
| 4607 | STATIC_ASSERT(kShortExternalStringTag != 0); |
| 4608 | __ tst(r4, Operand(kShortExternalStringMask)); |
| 4609 | __ b(ne, &call_runtime); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4610 | __ ldr(r6, FieldMemOperand(r0, ExternalString::kResourceDataOffset)); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4611 | __ bind(&first_prepared); |
| 4612 | |
| 4613 | STATIC_ASSERT(kSeqStringTag == 0); |
| 4614 | __ tst(r5, Operand(kStringRepresentationMask)); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4615 | STATIC_ASSERT(SeqOneByteString::kHeaderSize == SeqTwoByteString::kHeaderSize); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4616 | __ add(r1, |
| 4617 | r1, |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4618 | Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag), |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4619 | LeaveCC, |
| 4620 | eq); |
| 4621 | __ b(eq, &second_prepared); |
| 4622 | // External string: rule out short external string and load string resource. |
| 4623 | STATIC_ASSERT(kShortExternalStringTag != 0); |
| 4624 | __ tst(r5, Operand(kShortExternalStringMask)); |
| 4625 | __ b(ne, &call_runtime); |
| 4626 | __ ldr(r1, FieldMemOperand(r1, ExternalString::kResourceDataOffset)); |
| 4627 | __ bind(&second_prepared); |
| 4628 | |
| 4629 | Label non_ascii_string_add_flat_result; |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4630 | // r6: first character of first string |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4631 | // r1: first character of second string |
| 4632 | // r2: length of first string. |
| 4633 | // r3: length of second string. |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4634 | // Both strings have the same encoding. |
| 4635 | STATIC_ASSERT(kTwoByteStringTag == 0); |
| 4636 | __ tst(r5, Operand(kStringEncodingMask)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4637 | __ b(eq, &non_ascii_string_add_flat_result); |
| 4638 | |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4639 | __ add(r2, r2, Operand(r3)); |
| 4640 | __ AllocateAsciiString(r0, r2, r4, r5, r9, &call_runtime); |
| 4641 | __ sub(r2, r2, Operand(r3)); |
| 4642 | __ add(r5, r0, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4643 | // r0: result string. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4644 | // r6: first character of first string. |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4645 | // r1: first character of second string. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4646 | // r2: length of first string. |
| 4647 | // r3: length of second string. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4648 | // r5: first character of result. |
| 4649 | StringHelper::GenerateCopyCharacters(masm, r5, r6, r2, r4, true); |
| 4650 | // r5: next character of result. |
| 4651 | StringHelper::GenerateCopyCharacters(masm, r5, r1, r3, r4, true); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 4652 | __ IncrementCounter(counters->string_add_native(), 1, r2, r3); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4653 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 4654 | __ Ret(); |
| 4655 | |
| 4656 | __ bind(&non_ascii_string_add_flat_result); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4657 | __ add(r2, r2, Operand(r3)); |
| 4658 | __ AllocateTwoByteString(r0, r2, r4, r5, r9, &call_runtime); |
| 4659 | __ sub(r2, r2, Operand(r3)); |
| 4660 | __ add(r5, r0, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4661 | // r0: result string. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4662 | // r6: first character of first string. |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4663 | // r1: first character of second string. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4664 | // r2: length of first string. |
| 4665 | // r3: length of second string. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 4666 | // r5: first character of result. |
| 4667 | StringHelper::GenerateCopyCharacters(masm, r5, r6, r2, r4, false); |
| 4668 | // r5: next character of result. |
| 4669 | StringHelper::GenerateCopyCharacters(masm, r5, r1, r3, r4, false); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 4670 | __ IncrementCounter(counters->string_add_native(), 1, r2, r3); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4671 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 4672 | __ Ret(); |
| 4673 | |
| 4674 | // Just jump to runtime to add the two strings. |
ricow@chromium.org | 7ad6522 | 2011-12-19 12:13:11 +0000 | [diff] [blame] | 4675 | __ bind(&call_runtime); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4676 | if ((flags_ & STRING_ADD_ERECT_FRAME) != 0) { |
jkummerow@chromium.org | 4e308cf | 2013-05-17 13:39:16 +0000 | [diff] [blame] | 4677 | GenerateRegisterArgsPop(masm); |
| 4678 | // Build a frame |
| 4679 | { |
| 4680 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 4681 | GenerateRegisterArgsPush(masm); |
| 4682 | __ CallRuntime(Runtime::kStringAdd, 2); |
| 4683 | } |
| 4684 | __ Ret(); |
| 4685 | } else { |
| 4686 | __ TailCallRuntime(Runtime::kStringAdd, 2, 1); |
| 4687 | } |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 4688 | |
| 4689 | if (call_builtin.is_linked()) { |
| 4690 | __ bind(&call_builtin); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4691 | if ((flags_ & STRING_ADD_ERECT_FRAME) != 0) { |
jkummerow@chromium.org | 4e308cf | 2013-05-17 13:39:16 +0000 | [diff] [blame] | 4692 | GenerateRegisterArgsPop(masm); |
| 4693 | // Build a frame |
| 4694 | { |
| 4695 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 4696 | GenerateRegisterArgsPush(masm); |
| 4697 | __ InvokeBuiltin(builtin_id, CALL_FUNCTION); |
| 4698 | } |
| 4699 | __ Ret(); |
| 4700 | } else { |
| 4701 | __ InvokeBuiltin(builtin_id, JUMP_FUNCTION); |
| 4702 | } |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 4703 | } |
| 4704 | } |
| 4705 | |
| 4706 | |
jkummerow@chromium.org | 4e308cf | 2013-05-17 13:39:16 +0000 | [diff] [blame] | 4707 | void StringAddStub::GenerateRegisterArgsPush(MacroAssembler* masm) { |
| 4708 | __ push(r0); |
| 4709 | __ push(r1); |
| 4710 | } |
| 4711 | |
| 4712 | |
| 4713 | void StringAddStub::GenerateRegisterArgsPop(MacroAssembler* masm) { |
| 4714 | __ pop(r1); |
| 4715 | __ pop(r0); |
| 4716 | } |
| 4717 | |
| 4718 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 4719 | void StringAddStub::GenerateConvertArgument(MacroAssembler* masm, |
| 4720 | int stack_offset, |
| 4721 | Register arg, |
| 4722 | Register scratch1, |
| 4723 | Register scratch2, |
| 4724 | Register scratch3, |
| 4725 | Register scratch4, |
| 4726 | Label* slow) { |
| 4727 | // First check if the argument is already a string. |
| 4728 | Label not_string, done; |
| 4729 | __ JumpIfSmi(arg, ¬_string); |
| 4730 | __ CompareObjectType(arg, scratch1, scratch1, FIRST_NONSTRING_TYPE); |
| 4731 | __ b(lt, &done); |
| 4732 | |
| 4733 | // Check the number to string cache. |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 4734 | __ bind(¬_string); |
| 4735 | // Puts the cached result into scratch1. |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 4736 | __ LookupNumberStringCache(arg, scratch1, scratch2, scratch3, scratch4, slow); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 4737 | __ mov(arg, scratch1); |
| 4738 | __ str(arg, MemOperand(sp, stack_offset)); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 4739 | __ bind(&done); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4740 | } |
| 4741 | |
| 4742 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4743 | void ICCompareStub::GenerateSmis(MacroAssembler* masm) { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4744 | ASSERT(state_ == CompareIC::SMI); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4745 | Label miss; |
| 4746 | __ orr(r2, r1, r0); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 4747 | __ JumpIfNotSmi(r2, &miss); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4748 | |
| 4749 | if (GetCondition() == eq) { |
| 4750 | // For equality we do not care about the sign of the result. |
| 4751 | __ sub(r0, r0, r1, SetCC); |
| 4752 | } else { |
sgjesse@chromium.org | 496c03a | 2011-02-14 12:05:43 +0000 | [diff] [blame] | 4753 | // Untag before subtracting to avoid handling overflow. |
| 4754 | __ SmiUntag(r1); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 4755 | __ sub(r0, r1, Operand::SmiUntag(r0)); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4756 | } |
| 4757 | __ Ret(); |
| 4758 | |
| 4759 | __ bind(&miss); |
| 4760 | GenerateMiss(masm); |
| 4761 | } |
| 4762 | |
| 4763 | |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 4764 | void ICCompareStub::GenerateNumbers(MacroAssembler* masm) { |
| 4765 | ASSERT(state_ == CompareIC::NUMBER); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4766 | |
| 4767 | Label generic_stub; |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 4768 | Label unordered, maybe_undefined1, maybe_undefined2; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4769 | Label miss; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4770 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4771 | if (left_ == CompareIC::SMI) { |
| 4772 | __ JumpIfNotSmi(r1, &miss); |
| 4773 | } |
| 4774 | if (right_ == CompareIC::SMI) { |
| 4775 | __ JumpIfNotSmi(r0, &miss); |
| 4776 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4777 | |
| 4778 | // Inlining the double comparison and falling back to the general compare |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4779 | // stub if NaN is involved. |
| 4780 | // Load left and right operand. |
| 4781 | Label done, left, left_smi, right_smi; |
| 4782 | __ JumpIfSmi(r0, &right_smi); |
| 4783 | __ CheckMap(r0, r2, Heap::kHeapNumberMapRootIndex, &maybe_undefined1, |
| 4784 | DONT_DO_SMI_CHECK); |
| 4785 | __ sub(r2, r0, Operand(kHeapObjectTag)); |
| 4786 | __ vldr(d1, r2, HeapNumber::kValueOffset); |
| 4787 | __ b(&left); |
| 4788 | __ bind(&right_smi); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 4789 | __ SmiToDouble(d1, r0); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4790 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4791 | __ bind(&left); |
| 4792 | __ JumpIfSmi(r1, &left_smi); |
| 4793 | __ CheckMap(r1, r2, Heap::kHeapNumberMapRootIndex, &maybe_undefined2, |
| 4794 | DONT_DO_SMI_CHECK); |
| 4795 | __ sub(r2, r1, Operand(kHeapObjectTag)); |
| 4796 | __ vldr(d0, r2, HeapNumber::kValueOffset); |
| 4797 | __ b(&done); |
| 4798 | __ bind(&left_smi); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 4799 | __ SmiToDouble(d0, r1); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4800 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4801 | __ bind(&done); |
| 4802 | // Compare operands. |
| 4803 | __ VFPCompareAndSetFlags(d0, d1); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4804 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4805 | // Don't base result on status bits when a NaN is involved. |
| 4806 | __ b(vs, &unordered); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4807 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 4808 | // Return a result of -1, 0, or 1, based on status bits. |
| 4809 | __ mov(r0, Operand(EQUAL), LeaveCC, eq); |
| 4810 | __ mov(r0, Operand(LESS), LeaveCC, lt); |
| 4811 | __ mov(r0, Operand(GREATER), LeaveCC, gt); |
| 4812 | __ Ret(); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4813 | |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 4814 | __ bind(&unordered); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4815 | __ bind(&generic_stub); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4816 | ICCompareStub stub(op_, CompareIC::GENERIC, CompareIC::GENERIC, |
| 4817 | CompareIC::GENERIC); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 4818 | __ Jump(stub.GetCode(masm->isolate()), RelocInfo::CODE_TARGET); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4819 | |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 4820 | __ bind(&maybe_undefined1); |
| 4821 | if (Token::IsOrderedRelationalCompareOp(op_)) { |
| 4822 | __ CompareRoot(r0, Heap::kUndefinedValueRootIndex); |
| 4823 | __ b(ne, &miss); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4824 | __ JumpIfSmi(r1, &unordered); |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 4825 | __ CompareObjectType(r1, r2, r2, HEAP_NUMBER_TYPE); |
| 4826 | __ b(ne, &maybe_undefined2); |
| 4827 | __ jmp(&unordered); |
| 4828 | } |
| 4829 | |
| 4830 | __ bind(&maybe_undefined2); |
| 4831 | if (Token::IsOrderedRelationalCompareOp(op_)) { |
| 4832 | __ CompareRoot(r1, Heap::kUndefinedValueRootIndex); |
| 4833 | __ b(eq, &unordered); |
| 4834 | } |
| 4835 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4836 | __ bind(&miss); |
| 4837 | GenerateMiss(masm); |
| 4838 | } |
| 4839 | |
| 4840 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4841 | void ICCompareStub::GenerateInternalizedStrings(MacroAssembler* masm) { |
| 4842 | ASSERT(state_ == CompareIC::INTERNALIZED_STRING); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4843 | Label miss; |
| 4844 | |
| 4845 | // Registers containing left and right operands respectively. |
| 4846 | Register left = r1; |
| 4847 | Register right = r0; |
| 4848 | Register tmp1 = r2; |
| 4849 | Register tmp2 = r3; |
| 4850 | |
| 4851 | // Check that both operands are heap objects. |
| 4852 | __ JumpIfEitherSmi(left, right, &miss); |
| 4853 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4854 | // Check that both operands are internalized strings. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4855 | __ ldr(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| 4856 | __ ldr(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| 4857 | __ ldrb(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| 4858 | __ ldrb(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4859 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| 4860 | __ orr(tmp1, tmp1, Operand(tmp2)); |
| 4861 | __ tst(tmp1, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 4862 | __ b(ne, &miss); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4863 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4864 | // Internalized strings are compared by identity. |
| 4865 | __ cmp(left, right); |
| 4866 | // Make sure r0 is non-zero. At this point input operands are |
| 4867 | // guaranteed to be non-zero. |
| 4868 | ASSERT(right.is(r0)); |
| 4869 | STATIC_ASSERT(EQUAL == 0); |
| 4870 | STATIC_ASSERT(kSmiTag == 0); |
| 4871 | __ mov(r0, Operand(Smi::FromInt(EQUAL)), LeaveCC, eq); |
| 4872 | __ Ret(); |
| 4873 | |
| 4874 | __ bind(&miss); |
| 4875 | GenerateMiss(masm); |
| 4876 | } |
| 4877 | |
| 4878 | |
| 4879 | void ICCompareStub::GenerateUniqueNames(MacroAssembler* masm) { |
| 4880 | ASSERT(state_ == CompareIC::UNIQUE_NAME); |
| 4881 | ASSERT(GetCondition() == eq); |
| 4882 | Label miss; |
| 4883 | |
| 4884 | // Registers containing left and right operands respectively. |
| 4885 | Register left = r1; |
| 4886 | Register right = r0; |
| 4887 | Register tmp1 = r2; |
| 4888 | Register tmp2 = r3; |
| 4889 | |
| 4890 | // Check that both operands are heap objects. |
| 4891 | __ JumpIfEitherSmi(left, right, &miss); |
| 4892 | |
| 4893 | // Check that both operands are unique names. This leaves the instance |
| 4894 | // types loaded in tmp1 and tmp2. |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4895 | __ ldr(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| 4896 | __ ldr(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| 4897 | __ ldrb(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| 4898 | __ ldrb(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
| 4899 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 4900 | __ JumpIfNotUniqueName(tmp1, &miss); |
| 4901 | __ JumpIfNotUniqueName(tmp2, &miss); |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4902 | |
| 4903 | // Unique names are compared by identity. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4904 | __ cmp(left, right); |
| 4905 | // Make sure r0 is non-zero. At this point input operands are |
| 4906 | // guaranteed to be non-zero. |
| 4907 | ASSERT(right.is(r0)); |
| 4908 | STATIC_ASSERT(EQUAL == 0); |
| 4909 | STATIC_ASSERT(kSmiTag == 0); |
| 4910 | __ mov(r0, Operand(Smi::FromInt(EQUAL)), LeaveCC, eq); |
| 4911 | __ Ret(); |
| 4912 | |
| 4913 | __ bind(&miss); |
| 4914 | GenerateMiss(masm); |
| 4915 | } |
| 4916 | |
| 4917 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4918 | void ICCompareStub::GenerateStrings(MacroAssembler* masm) { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4919 | ASSERT(state_ == CompareIC::STRING); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4920 | Label miss; |
| 4921 | |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 4922 | bool equality = Token::IsEqualityOp(op_); |
| 4923 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4924 | // Registers containing left and right operands respectively. |
| 4925 | Register left = r1; |
| 4926 | Register right = r0; |
| 4927 | Register tmp1 = r2; |
| 4928 | Register tmp2 = r3; |
| 4929 | Register tmp3 = r4; |
| 4930 | Register tmp4 = r5; |
| 4931 | |
| 4932 | // Check that both operands are heap objects. |
| 4933 | __ JumpIfEitherSmi(left, right, &miss); |
| 4934 | |
| 4935 | // Check that both operands are strings. This leaves the instance |
| 4936 | // types loaded in tmp1 and tmp2. |
| 4937 | __ ldr(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| 4938 | __ ldr(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| 4939 | __ ldrb(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| 4940 | __ ldrb(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
| 4941 | STATIC_ASSERT(kNotStringTag != 0); |
| 4942 | __ orr(tmp3, tmp1, tmp2); |
| 4943 | __ tst(tmp3, Operand(kIsNotStringMask)); |
| 4944 | __ b(ne, &miss); |
| 4945 | |
| 4946 | // Fast check for identical strings. |
| 4947 | __ cmp(left, right); |
| 4948 | STATIC_ASSERT(EQUAL == 0); |
| 4949 | STATIC_ASSERT(kSmiTag == 0); |
| 4950 | __ mov(r0, Operand(Smi::FromInt(EQUAL)), LeaveCC, eq); |
| 4951 | __ Ret(eq); |
| 4952 | |
| 4953 | // Handle not identical strings. |
| 4954 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 4955 | // Check that both strings are internalized strings. If they are, we're done |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 4956 | // because we already know they are not identical. We know they are both |
| 4957 | // strings. |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 4958 | if (equality) { |
| 4959 | ASSERT(GetCondition() == eq); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4960 | STATIC_ASSERT(kInternalizedTag == 0); |
| 4961 | __ orr(tmp3, tmp1, Operand(tmp2)); |
| 4962 | __ tst(tmp3, Operand(kIsNotInternalizedMask)); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 4963 | // Make sure r0 is non-zero. At this point input operands are |
| 4964 | // guaranteed to be non-zero. |
| 4965 | ASSERT(right.is(r0)); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 4966 | __ Ret(eq); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 4967 | } |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4968 | |
| 4969 | // Check that both strings are sequential ASCII. |
| 4970 | Label runtime; |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 4971 | __ JumpIfBothInstanceTypesAreNotSequentialAscii( |
| 4972 | tmp1, tmp2, tmp3, tmp4, &runtime); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4973 | |
| 4974 | // Compare flat ASCII strings. Returns when done. |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 4975 | if (equality) { |
| 4976 | StringCompareStub::GenerateFlatAsciiStringEquals( |
| 4977 | masm, left, right, tmp1, tmp2, tmp3); |
| 4978 | } else { |
| 4979 | StringCompareStub::GenerateCompareFlatAsciiStrings( |
| 4980 | masm, left, right, tmp1, tmp2, tmp3, tmp4); |
| 4981 | } |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4982 | |
| 4983 | // Handle more complex cases in runtime. |
| 4984 | __ bind(&runtime); |
| 4985 | __ Push(left, right); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 4986 | if (equality) { |
| 4987 | __ TailCallRuntime(Runtime::kStringEquals, 2, 1); |
| 4988 | } else { |
| 4989 | __ TailCallRuntime(Runtime::kStringCompare, 2, 1); |
| 4990 | } |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 4991 | |
| 4992 | __ bind(&miss); |
| 4993 | GenerateMiss(masm); |
| 4994 | } |
| 4995 | |
| 4996 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4997 | void ICCompareStub::GenerateObjects(MacroAssembler* masm) { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 4998 | ASSERT(state_ == CompareIC::OBJECT); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4999 | Label miss; |
| 5000 | __ and_(r2, r1, Operand(r0)); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 5001 | __ JumpIfSmi(r2, &miss); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 5002 | |
| 5003 | __ CompareObjectType(r0, r2, r2, JS_OBJECT_TYPE); |
| 5004 | __ b(ne, &miss); |
| 5005 | __ CompareObjectType(r1, r2, r2, JS_OBJECT_TYPE); |
| 5006 | __ b(ne, &miss); |
| 5007 | |
| 5008 | ASSERT(GetCondition() == eq); |
| 5009 | __ sub(r0, r0, Operand(r1)); |
| 5010 | __ Ret(); |
| 5011 | |
| 5012 | __ bind(&miss); |
| 5013 | GenerateMiss(masm); |
| 5014 | } |
| 5015 | |
| 5016 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5017 | void ICCompareStub::GenerateKnownObjects(MacroAssembler* masm) { |
| 5018 | Label miss; |
| 5019 | __ and_(r2, r1, Operand(r0)); |
| 5020 | __ JumpIfSmi(r2, &miss); |
| 5021 | __ ldr(r2, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 5022 | __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 5023 | __ cmp(r2, Operand(known_map_)); |
| 5024 | __ b(ne, &miss); |
| 5025 | __ cmp(r3, Operand(known_map_)); |
| 5026 | __ b(ne, &miss); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 5027 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5028 | __ sub(r0, r0, Operand(r1)); |
| 5029 | __ Ret(); |
| 5030 | |
| 5031 | __ bind(&miss); |
| 5032 | GenerateMiss(masm); |
| 5033 | } |
| 5034 | |
| 5035 | |
| 5036 | |
| 5037 | void ICCompareStub::GenerateMiss(MacroAssembler* masm) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5038 | { |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5039 | // Call the runtime system in a fresh internal frame. |
| 5040 | ExternalReference miss = |
| 5041 | ExternalReference(IC_Utility(IC::kCompareIC_Miss), masm->isolate()); |
| 5042 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5043 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 5044 | __ Push(r1, r0); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5045 | __ push(lr); |
| 5046 | __ Push(r1, r0); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5047 | __ mov(ip, Operand(Smi::FromInt(op_))); |
| 5048 | __ push(ip); |
| 5049 | __ CallExternalReference(miss, 3); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5050 | // Compute the entry point of the rewritten stub. |
| 5051 | __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 5052 | // Restore registers. |
| 5053 | __ pop(lr); |
| 5054 | __ pop(r0); |
| 5055 | __ pop(r1); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5056 | } |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 5057 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 5058 | __ Jump(r2); |
| 5059 | } |
| 5060 | |
| 5061 | |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 5062 | void DirectCEntryStub::Generate(MacroAssembler* masm) { |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 5063 | // Place the return address on the stack, making the call |
| 5064 | // GC safe. The RegExp backend also relies on this. |
| 5065 | __ str(lr, MemOperand(sp, 0)); |
| 5066 | __ blx(ip); // Call the C++ function. |
| 5067 | __ VFPEnsureFPSCRState(r2); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 5068 | __ ldr(pc, MemOperand(sp, 0)); |
| 5069 | } |
| 5070 | |
| 5071 | |
| 5072 | void DirectCEntryStub::GenerateCall(MacroAssembler* masm, |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 5073 | Register target) { |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 5074 | intptr_t code = |
| 5075 | reinterpret_cast<intptr_t>(GetCode(masm->isolate()).location()); |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 5076 | __ Move(ip, target); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 5077 | __ mov(lr, Operand(code, RelocInfo::CODE_TARGET)); |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 5078 | __ blx(lr); // Call the stub. |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 5079 | } |
| 5080 | |
| 5081 | |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5082 | void NameDictionaryLookupStub::GenerateNegativeLookup(MacroAssembler* masm, |
| 5083 | Label* miss, |
| 5084 | Label* done, |
| 5085 | Register receiver, |
| 5086 | Register properties, |
| 5087 | Handle<Name> name, |
| 5088 | Register scratch0) { |
| 5089 | ASSERT(name->IsUniqueName()); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 5090 | // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| 5091 | // not equal to the name and kProbes-th slot is not used (its name is the |
| 5092 | // undefined value), it guarantees the hash table doesn't contain the |
| 5093 | // property. It's true even if some slots represent deleted properties |
ulan@chromium.org | 967e270 | 2012-02-28 09:49:15 +0000 | [diff] [blame] | 5094 | // (their names are the hole value). |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 5095 | for (int i = 0; i < kInlinedProbes; i++) { |
| 5096 | // scratch0 points to properties hash. |
| 5097 | // Compute the masked index: (hash + i + i * i) & mask. |
| 5098 | Register index = scratch0; |
| 5099 | // Capacity is smi 2^n. |
| 5100 | __ ldr(index, FieldMemOperand(properties, kCapacityOffset)); |
| 5101 | __ sub(index, index, Operand(1)); |
| 5102 | __ and_(index, index, Operand( |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5103 | Smi::FromInt(name->Hash() + NameDictionary::GetProbeOffset(i)))); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 5104 | |
| 5105 | // Scale the index by multiplying by the entry size. |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5106 | ASSERT(NameDictionary::kEntrySize == 3); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 5107 | __ add(index, index, Operand(index, LSL, 1)); // index *= 3. |
| 5108 | |
| 5109 | Register entity_name = scratch0; |
| 5110 | // Having undefined at this place means the name is not contained. |
| 5111 | ASSERT_EQ(kSmiTagSize, 1); |
| 5112 | Register tmp = properties; |
| 5113 | __ add(tmp, properties, Operand(index, LSL, 1)); |
| 5114 | __ ldr(entity_name, FieldMemOperand(tmp, kElementsStartOffset)); |
| 5115 | |
| 5116 | ASSERT(!tmp.is(entity_name)); |
| 5117 | __ LoadRoot(tmp, Heap::kUndefinedValueRootIndex); |
| 5118 | __ cmp(entity_name, tmp); |
| 5119 | __ b(eq, done); |
| 5120 | |
ulan@chromium.org | 77802e8 | 2013-03-26 11:54:42 +0000 | [diff] [blame] | 5121 | // Load the hole ready for use below: |
| 5122 | __ LoadRoot(tmp, Heap::kTheHoleValueRootIndex); |
ulan@chromium.org | 967e270 | 2012-02-28 09:49:15 +0000 | [diff] [blame] | 5123 | |
ulan@chromium.org | 77802e8 | 2013-03-26 11:54:42 +0000 | [diff] [blame] | 5124 | // Stop if found the property. |
| 5125 | __ cmp(entity_name, Operand(Handle<Name>(name))); |
| 5126 | __ b(eq, miss); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 5127 | |
ulan@chromium.org | 77802e8 | 2013-03-26 11:54:42 +0000 | [diff] [blame] | 5128 | Label good; |
| 5129 | __ cmp(entity_name, tmp); |
| 5130 | __ b(eq, &good); |
ulan@chromium.org | 967e270 | 2012-02-28 09:49:15 +0000 | [diff] [blame] | 5131 | |
ulan@chromium.org | 77802e8 | 2013-03-26 11:54:42 +0000 | [diff] [blame] | 5132 | // Check if the entry name is not a unique name. |
| 5133 | __ ldr(entity_name, FieldMemOperand(entity_name, HeapObject::kMapOffset)); |
| 5134 | __ ldrb(entity_name, |
| 5135 | FieldMemOperand(entity_name, Map::kInstanceTypeOffset)); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5136 | __ JumpIfNotUniqueName(entity_name, miss); |
ulan@chromium.org | 77802e8 | 2013-03-26 11:54:42 +0000 | [diff] [blame] | 5137 | __ bind(&good); |
ulan@chromium.org | 967e270 | 2012-02-28 09:49:15 +0000 | [diff] [blame] | 5138 | |
ulan@chromium.org | 77802e8 | 2013-03-26 11:54:42 +0000 | [diff] [blame] | 5139 | // Restore the properties. |
| 5140 | __ ldr(properties, |
| 5141 | FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 5142 | } |
| 5143 | |
| 5144 | const int spill_mask = |
| 5145 | (lr.bit() | r6.bit() | r5.bit() | r4.bit() | r3.bit() | |
| 5146 | r2.bit() | r1.bit() | r0.bit()); |
| 5147 | |
| 5148 | __ stm(db_w, sp, spill_mask); |
| 5149 | __ ldr(r0, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5150 | __ mov(r1, Operand(Handle<Name>(name))); |
| 5151 | NameDictionaryLookupStub stub(NEGATIVE_LOOKUP); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 5152 | __ CallStub(&stub); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5153 | __ cmp(r0, Operand::Zero()); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 5154 | __ ldm(ia_w, sp, spill_mask); |
| 5155 | |
| 5156 | __ b(eq, done); |
| 5157 | __ b(ne, miss); |
| 5158 | } |
| 5159 | |
| 5160 | |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5161 | // Probe the name dictionary in the |elements| register. Jump to the |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5162 | // |done| label if a property with the given name is found. Jump to |
| 5163 | // the |miss| label otherwise. |
| 5164 | // If lookup was successful |scratch2| will be equal to elements + 4 * index. |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5165 | void NameDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm, |
| 5166 | Label* miss, |
| 5167 | Label* done, |
| 5168 | Register elements, |
| 5169 | Register name, |
| 5170 | Register scratch1, |
| 5171 | Register scratch2) { |
erik.corry@gmail.com | 6e28b56 | 2011-10-27 14:20:17 +0000 | [diff] [blame] | 5172 | ASSERT(!elements.is(scratch1)); |
| 5173 | ASSERT(!elements.is(scratch2)); |
| 5174 | ASSERT(!name.is(scratch1)); |
| 5175 | ASSERT(!name.is(scratch2)); |
| 5176 | |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5177 | __ AssertName(name); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5178 | |
| 5179 | // Compute the capacity mask. |
| 5180 | __ ldr(scratch1, FieldMemOperand(elements, kCapacityOffset)); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 5181 | __ SmiUntag(scratch1); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5182 | __ sub(scratch1, scratch1, Operand(1)); |
| 5183 | |
| 5184 | // Generate an unrolled loop that performs a few probes before |
| 5185 | // giving up. Measurements done on Gmail indicate that 2 probes |
| 5186 | // cover ~93% of loads from dictionaries. |
| 5187 | for (int i = 0; i < kInlinedProbes; i++) { |
| 5188 | // Compute the masked index: (hash + i + i * i) & mask. |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5189 | __ ldr(scratch2, FieldMemOperand(name, Name::kHashFieldOffset)); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5190 | if (i > 0) { |
| 5191 | // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| 5192 | // the hash in a separate instruction. The value hash + i + i * i is right |
| 5193 | // shifted in the following and instruction. |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5194 | ASSERT(NameDictionary::GetProbeOffset(i) < |
| 5195 | 1 << (32 - Name::kHashFieldOffset)); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5196 | __ add(scratch2, scratch2, Operand( |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5197 | NameDictionary::GetProbeOffset(i) << Name::kHashShift)); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5198 | } |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5199 | __ and_(scratch2, scratch1, Operand(scratch2, LSR, Name::kHashShift)); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5200 | |
| 5201 | // Scale the index by multiplying by the element size. |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5202 | ASSERT(NameDictionary::kEntrySize == 3); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5203 | // scratch2 = scratch2 * 3. |
| 5204 | __ add(scratch2, scratch2, Operand(scratch2, LSL, 1)); |
| 5205 | |
| 5206 | // Check if the key is identical to the name. |
| 5207 | __ add(scratch2, elements, Operand(scratch2, LSL, 2)); |
| 5208 | __ ldr(ip, FieldMemOperand(scratch2, kElementsStartOffset)); |
| 5209 | __ cmp(name, Operand(ip)); |
| 5210 | __ b(eq, done); |
| 5211 | } |
| 5212 | |
| 5213 | const int spill_mask = |
| 5214 | (lr.bit() | r6.bit() | r5.bit() | r4.bit() | |
| 5215 | r3.bit() | r2.bit() | r1.bit() | r0.bit()) & |
| 5216 | ~(scratch1.bit() | scratch2.bit()); |
| 5217 | |
| 5218 | __ stm(db_w, sp, spill_mask); |
erik.corry@gmail.com | 6e28b56 | 2011-10-27 14:20:17 +0000 | [diff] [blame] | 5219 | if (name.is(r0)) { |
| 5220 | ASSERT(!elements.is(r1)); |
| 5221 | __ Move(r1, name); |
| 5222 | __ Move(r0, elements); |
| 5223 | } else { |
| 5224 | __ Move(r0, elements); |
| 5225 | __ Move(r1, name); |
| 5226 | } |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5227 | NameDictionaryLookupStub stub(POSITIVE_LOOKUP); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5228 | __ CallStub(&stub); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5229 | __ cmp(r0, Operand::Zero()); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5230 | __ mov(scratch2, Operand(r2)); |
| 5231 | __ ldm(ia_w, sp, spill_mask); |
| 5232 | |
| 5233 | __ b(ne, done); |
| 5234 | __ b(eq, miss); |
| 5235 | } |
| 5236 | |
| 5237 | |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5238 | void NameDictionaryLookupStub::Generate(MacroAssembler* masm) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5239 | // This stub overrides SometimesSetsUpAFrame() to return false. That means |
| 5240 | // we cannot call anything that could cause a GC from this stub. |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5241 | // Registers: |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5242 | // result: NameDictionary to probe |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5243 | // r1: key |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5244 | // dictionary: NameDictionary to probe. |
| 5245 | // index: will hold an index of entry if lookup is successful. |
| 5246 | // might alias with result_. |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5247 | // Returns: |
| 5248 | // result_ is zero if lookup failed, non zero otherwise. |
| 5249 | |
| 5250 | Register result = r0; |
| 5251 | Register dictionary = r0; |
| 5252 | Register key = r1; |
| 5253 | Register index = r2; |
| 5254 | Register mask = r3; |
| 5255 | Register hash = r4; |
| 5256 | Register undefined = r5; |
| 5257 | Register entry_key = r6; |
| 5258 | |
| 5259 | Label in_dictionary, maybe_in_dictionary, not_in_dictionary; |
| 5260 | |
| 5261 | __ ldr(mask, FieldMemOperand(dictionary, kCapacityOffset)); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 5262 | __ SmiUntag(mask); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5263 | __ sub(mask, mask, Operand(1)); |
| 5264 | |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5265 | __ ldr(hash, FieldMemOperand(key, Name::kHashFieldOffset)); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5266 | |
| 5267 | __ LoadRoot(undefined, Heap::kUndefinedValueRootIndex); |
| 5268 | |
| 5269 | for (int i = kInlinedProbes; i < kTotalProbes; i++) { |
| 5270 | // Compute the masked index: (hash + i + i * i) & mask. |
| 5271 | // Capacity is smi 2^n. |
| 5272 | if (i > 0) { |
| 5273 | // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| 5274 | // the hash in a separate instruction. The value hash + i + i * i is right |
| 5275 | // shifted in the following and instruction. |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5276 | ASSERT(NameDictionary::GetProbeOffset(i) < |
| 5277 | 1 << (32 - Name::kHashFieldOffset)); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5278 | __ add(index, hash, Operand( |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5279 | NameDictionary::GetProbeOffset(i) << Name::kHashShift)); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5280 | } else { |
| 5281 | __ mov(index, Operand(hash)); |
| 5282 | } |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5283 | __ and_(index, mask, Operand(index, LSR, Name::kHashShift)); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5284 | |
| 5285 | // Scale the index by multiplying by the entry size. |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5286 | ASSERT(NameDictionary::kEntrySize == 3); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5287 | __ add(index, index, Operand(index, LSL, 1)); // index *= 3. |
| 5288 | |
| 5289 | ASSERT_EQ(kSmiTagSize, 1); |
| 5290 | __ add(index, dictionary, Operand(index, LSL, 2)); |
| 5291 | __ ldr(entry_key, FieldMemOperand(index, kElementsStartOffset)); |
| 5292 | |
| 5293 | // Having undefined at this place means the name is not contained. |
| 5294 | __ cmp(entry_key, Operand(undefined)); |
| 5295 | __ b(eq, ¬_in_dictionary); |
| 5296 | |
| 5297 | // Stop if found the property. |
| 5298 | __ cmp(entry_key, Operand(key)); |
| 5299 | __ b(eq, &in_dictionary); |
| 5300 | |
| 5301 | if (i != kTotalProbes - 1 && mode_ == NEGATIVE_LOOKUP) { |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 5302 | // Check if the entry name is not a unique name. |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5303 | __ ldr(entry_key, FieldMemOperand(entry_key, HeapObject::kMapOffset)); |
| 5304 | __ ldrb(entry_key, |
| 5305 | FieldMemOperand(entry_key, Map::kInstanceTypeOffset)); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5306 | __ JumpIfNotUniqueName(entry_key, &maybe_in_dictionary); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5307 | } |
| 5308 | } |
| 5309 | |
| 5310 | __ bind(&maybe_in_dictionary); |
| 5311 | // If we are doing negative lookup then probing failure should be |
| 5312 | // treated as a lookup success. For positive lookup probing failure |
| 5313 | // should be treated as lookup failure. |
| 5314 | if (mode_ == POSITIVE_LOOKUP) { |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 5315 | __ mov(result, Operand::Zero()); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5316 | __ Ret(); |
| 5317 | } |
| 5318 | |
| 5319 | __ bind(&in_dictionary); |
| 5320 | __ mov(result, Operand(1)); |
| 5321 | __ Ret(); |
| 5322 | |
| 5323 | __ bind(¬_in_dictionary); |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 5324 | __ mov(result, Operand::Zero()); |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 5325 | __ Ret(); |
| 5326 | } |
| 5327 | |
| 5328 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5329 | struct AheadOfTimeWriteBarrierStubList { |
| 5330 | Register object, value, address; |
| 5331 | RememberedSetAction action; |
| 5332 | }; |
| 5333 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 5334 | |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5335 | #define REG(Name) { kRegister_ ## Name ## _Code } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5336 | |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5337 | static const AheadOfTimeWriteBarrierStubList kAheadOfTime[] = { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5338 | // Used in RegExpExecStub. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5339 | { REG(r6), REG(r4), REG(r3), EMIT_REMEMBERED_SET }, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5340 | // Used in CompileArrayPushCall. |
| 5341 | // Also used in StoreIC::GenerateNormal via GenerateDictionaryStore. |
| 5342 | // Also used in KeyedStoreIC::GenerateGeneric. |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5343 | { REG(r3), REG(r4), REG(r5), EMIT_REMEMBERED_SET }, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5344 | // Used in StoreStubCompiler::CompileStoreField via GenerateStoreField. |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5345 | { REG(r1), REG(r2), REG(r3), EMIT_REMEMBERED_SET }, |
| 5346 | { REG(r3), REG(r2), REG(r1), EMIT_REMEMBERED_SET }, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5347 | // Used in KeyedStoreStubCompiler::CompileStoreField via GenerateStoreField. |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5348 | { REG(r2), REG(r1), REG(r3), EMIT_REMEMBERED_SET }, |
| 5349 | { REG(r3), REG(r1), REG(r2), EMIT_REMEMBERED_SET }, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5350 | // KeyedStoreStubCompiler::GenerateStoreFastElement. |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5351 | { REG(r3), REG(r2), REG(r4), EMIT_REMEMBERED_SET }, |
| 5352 | { REG(r2), REG(r3), REG(r4), EMIT_REMEMBERED_SET }, |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 5353 | // ElementsTransitionGenerator::GenerateMapChangeElementTransition |
| 5354 | // and ElementsTransitionGenerator::GenerateSmiToDouble |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 5355 | // and ElementsTransitionGenerator::GenerateDoubleToObject |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5356 | { REG(r2), REG(r3), REG(r9), EMIT_REMEMBERED_SET }, |
| 5357 | { REG(r2), REG(r3), REG(r9), OMIT_REMEMBERED_SET }, |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 5358 | // ElementsTransitionGenerator::GenerateDoubleToObject |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5359 | { REG(r6), REG(r2), REG(r0), EMIT_REMEMBERED_SET }, |
| 5360 | { REG(r2), REG(r6), REG(r9), EMIT_REMEMBERED_SET }, |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5361 | // StoreArrayLiteralElementStub::Generate |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5362 | { REG(r5), REG(r0), REG(r6), EMIT_REMEMBERED_SET }, |
yangguo@chromium.org | 5a11aaf | 2012-06-20 11:29:00 +0000 | [diff] [blame] | 5363 | // FastNewClosureStub::Generate |
| 5364 | { REG(r2), REG(r4), REG(r1), EMIT_REMEMBERED_SET }, |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 5365 | // StringAddStub::Generate |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 5366 | { REG(r3), REG(r1), REG(r4), EMIT_REMEMBERED_SET }, |
| 5367 | { REG(r3), REG(r0), REG(r4), EMIT_REMEMBERED_SET }, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5368 | // Null termination. |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5369 | { REG(no_reg), REG(no_reg), REG(no_reg), EMIT_REMEMBERED_SET} |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5370 | }; |
| 5371 | |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5372 | #undef REG |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5373 | |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 5374 | |
dslomov@chromium.org | e97852d | 2013-09-12 09:02:59 +0000 | [diff] [blame] | 5375 | bool RecordWriteStub::IsPregenerated(Isolate* isolate) { |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5376 | for (const AheadOfTimeWriteBarrierStubList* entry = kAheadOfTime; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5377 | !entry->object.is(no_reg); |
| 5378 | entry++) { |
| 5379 | if (object_.is(entry->object) && |
| 5380 | value_.is(entry->value) && |
| 5381 | address_.is(entry->address) && |
| 5382 | remembered_set_action_ == entry->action && |
| 5383 | save_fp_regs_mode_ == kDontSaveFPRegs) { |
| 5384 | return true; |
| 5385 | } |
| 5386 | } |
| 5387 | return false; |
| 5388 | } |
| 5389 | |
| 5390 | |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 5391 | void StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime( |
| 5392 | Isolate* isolate) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5393 | StoreBufferOverflowStub stub1(kDontSaveFPRegs); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 5394 | stub1.GetCode(isolate)->set_is_pregenerated(true); |
ulan@chromium.org | 77ca49a | 2013-04-22 09:43:56 +0000 | [diff] [blame] | 5395 | // Hydrogen code stubs need stub2 at snapshot time. |
| 5396 | StoreBufferOverflowStub stub2(kSaveFPRegs); |
| 5397 | stub2.GetCode(isolate)->set_is_pregenerated(true); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5398 | } |
| 5399 | |
| 5400 | |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 5401 | void RecordWriteStub::GenerateFixedRegStubsAheadOfTime(Isolate* isolate) { |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 5402 | for (const AheadOfTimeWriteBarrierStubList* entry = kAheadOfTime; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5403 | !entry->object.is(no_reg); |
| 5404 | entry++) { |
| 5405 | RecordWriteStub stub(entry->object, |
| 5406 | entry->value, |
| 5407 | entry->address, |
| 5408 | entry->action, |
| 5409 | kDontSaveFPRegs); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 5410 | stub.GetCode(isolate)->set_is_pregenerated(true); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5411 | } |
| 5412 | } |
| 5413 | |
| 5414 | |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 5415 | bool CodeStub::CanUseFPRegisters() { |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 5416 | return true; // VFP2 is a base requirement for V8 |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 5417 | } |
| 5418 | |
| 5419 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5420 | // Takes the input in 3 registers: address_ value_ and object_. A pointer to |
| 5421 | // the value has just been written into the object, now this stub makes sure |
| 5422 | // we keep the GC informed. The word in the object where the value has been |
| 5423 | // written is in the address register. |
| 5424 | void RecordWriteStub::Generate(MacroAssembler* masm) { |
| 5425 | Label skip_to_incremental_noncompacting; |
| 5426 | Label skip_to_incremental_compacting; |
| 5427 | |
| 5428 | // The first two instructions are generated with labels so as to get the |
| 5429 | // offset fixed up correctly by the bind(Label*) call. We patch it back and |
| 5430 | // forth between a compare instructions (a nop in this position) and the |
| 5431 | // real branch when we start and stop incremental heap marking. |
| 5432 | // See RecordWriteStub::Patch for details. |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 5433 | { |
| 5434 | // Block literal pool emission, as the position of these two instructions |
| 5435 | // is assumed by the patching code. |
| 5436 | Assembler::BlockConstPoolScope block_const_pool(masm); |
| 5437 | __ b(&skip_to_incremental_noncompacting); |
| 5438 | __ b(&skip_to_incremental_compacting); |
| 5439 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5440 | |
| 5441 | if (remembered_set_action_ == EMIT_REMEMBERED_SET) { |
| 5442 | __ RememberedSetHelper(object_, |
| 5443 | address_, |
| 5444 | value_, |
| 5445 | save_fp_regs_mode_, |
| 5446 | MacroAssembler::kReturnAtEnd); |
| 5447 | } |
| 5448 | __ Ret(); |
| 5449 | |
| 5450 | __ bind(&skip_to_incremental_noncompacting); |
| 5451 | GenerateIncremental(masm, INCREMENTAL); |
| 5452 | |
| 5453 | __ bind(&skip_to_incremental_compacting); |
| 5454 | GenerateIncremental(masm, INCREMENTAL_COMPACTION); |
| 5455 | |
| 5456 | // Initial mode of the stub is expected to be STORE_BUFFER_ONLY. |
| 5457 | // Will be checked in IncrementalMarking::ActivateGeneratedStub. |
| 5458 | ASSERT(Assembler::GetBranchOffset(masm->instr_at(0)) < (1 << 12)); |
| 5459 | ASSERT(Assembler::GetBranchOffset(masm->instr_at(4)) < (1 << 12)); |
| 5460 | PatchBranchIntoNop(masm, 0); |
| 5461 | PatchBranchIntoNop(masm, Assembler::kInstrSize); |
| 5462 | } |
| 5463 | |
| 5464 | |
| 5465 | void RecordWriteStub::GenerateIncremental(MacroAssembler* masm, Mode mode) { |
| 5466 | regs_.Save(masm); |
| 5467 | |
| 5468 | if (remembered_set_action_ == EMIT_REMEMBERED_SET) { |
| 5469 | Label dont_need_remembered_set; |
| 5470 | |
| 5471 | __ ldr(regs_.scratch0(), MemOperand(regs_.address(), 0)); |
| 5472 | __ JumpIfNotInNewSpace(regs_.scratch0(), // Value. |
| 5473 | regs_.scratch0(), |
| 5474 | &dont_need_remembered_set); |
| 5475 | |
| 5476 | __ CheckPageFlag(regs_.object(), |
| 5477 | regs_.scratch0(), |
| 5478 | 1 << MemoryChunk::SCAN_ON_SCAVENGE, |
| 5479 | ne, |
| 5480 | &dont_need_remembered_set); |
| 5481 | |
| 5482 | // First notify the incremental marker if necessary, then update the |
| 5483 | // remembered set. |
| 5484 | CheckNeedsToInformIncrementalMarker( |
| 5485 | masm, kUpdateRememberedSetOnNoNeedToInformIncrementalMarker, mode); |
| 5486 | InformIncrementalMarker(masm, mode); |
| 5487 | regs_.Restore(masm); |
| 5488 | __ RememberedSetHelper(object_, |
| 5489 | address_, |
| 5490 | value_, |
| 5491 | save_fp_regs_mode_, |
| 5492 | MacroAssembler::kReturnAtEnd); |
| 5493 | |
| 5494 | __ bind(&dont_need_remembered_set); |
| 5495 | } |
| 5496 | |
| 5497 | CheckNeedsToInformIncrementalMarker( |
| 5498 | masm, kReturnOnNoNeedToInformIncrementalMarker, mode); |
| 5499 | InformIncrementalMarker(masm, mode); |
| 5500 | regs_.Restore(masm); |
| 5501 | __ Ret(); |
| 5502 | } |
| 5503 | |
| 5504 | |
| 5505 | void RecordWriteStub::InformIncrementalMarker(MacroAssembler* masm, Mode mode) { |
| 5506 | regs_.SaveCallerSaveRegisters(masm, save_fp_regs_mode_); |
| 5507 | int argument_count = 3; |
| 5508 | __ PrepareCallCFunction(argument_count, regs_.scratch0()); |
| 5509 | Register address = |
| 5510 | r0.is(regs_.address()) ? regs_.scratch0() : regs_.address(); |
| 5511 | ASSERT(!address.is(regs_.object())); |
| 5512 | ASSERT(!address.is(r0)); |
| 5513 | __ Move(address, regs_.address()); |
| 5514 | __ Move(r0, regs_.object()); |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 5515 | __ Move(r1, address); |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 5516 | __ mov(r2, Operand(ExternalReference::isolate_address(masm->isolate()))); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5517 | |
| 5518 | AllowExternalCallThatCantCauseGC scope(masm); |
| 5519 | if (mode == INCREMENTAL_COMPACTION) { |
| 5520 | __ CallCFunction( |
| 5521 | ExternalReference::incremental_evacuation_record_write_function( |
| 5522 | masm->isolate()), |
| 5523 | argument_count); |
| 5524 | } else { |
| 5525 | ASSERT(mode == INCREMENTAL); |
| 5526 | __ CallCFunction( |
| 5527 | ExternalReference::incremental_marking_record_write_function( |
| 5528 | masm->isolate()), |
| 5529 | argument_count); |
| 5530 | } |
| 5531 | regs_.RestoreCallerSaveRegisters(masm, save_fp_regs_mode_); |
| 5532 | } |
| 5533 | |
| 5534 | |
| 5535 | void RecordWriteStub::CheckNeedsToInformIncrementalMarker( |
| 5536 | MacroAssembler* masm, |
| 5537 | OnNoNeedToInformIncrementalMarker on_no_need, |
| 5538 | Mode mode) { |
| 5539 | Label on_black; |
| 5540 | Label need_incremental; |
| 5541 | Label need_incremental_pop_scratch; |
| 5542 | |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 5543 | __ and_(regs_.scratch0(), regs_.object(), Operand(~Page::kPageAlignmentMask)); |
| 5544 | __ ldr(regs_.scratch1(), |
| 5545 | MemOperand(regs_.scratch0(), |
| 5546 | MemoryChunk::kWriteBarrierCounterOffset)); |
| 5547 | __ sub(regs_.scratch1(), regs_.scratch1(), Operand(1), SetCC); |
| 5548 | __ str(regs_.scratch1(), |
| 5549 | MemOperand(regs_.scratch0(), |
| 5550 | MemoryChunk::kWriteBarrierCounterOffset)); |
| 5551 | __ b(mi, &need_incremental); |
| 5552 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5553 | // Let's look at the color of the object: If it is not black we don't have |
| 5554 | // to inform the incremental marker. |
| 5555 | __ JumpIfBlack(regs_.object(), regs_.scratch0(), regs_.scratch1(), &on_black); |
| 5556 | |
| 5557 | regs_.Restore(masm); |
| 5558 | if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
| 5559 | __ RememberedSetHelper(object_, |
| 5560 | address_, |
| 5561 | value_, |
| 5562 | save_fp_regs_mode_, |
| 5563 | MacroAssembler::kReturnAtEnd); |
| 5564 | } else { |
| 5565 | __ Ret(); |
| 5566 | } |
| 5567 | |
| 5568 | __ bind(&on_black); |
| 5569 | |
| 5570 | // Get the value from the slot. |
| 5571 | __ ldr(regs_.scratch0(), MemOperand(regs_.address(), 0)); |
| 5572 | |
| 5573 | if (mode == INCREMENTAL_COMPACTION) { |
| 5574 | Label ensure_not_white; |
| 5575 | |
| 5576 | __ CheckPageFlag(regs_.scratch0(), // Contains value. |
| 5577 | regs_.scratch1(), // Scratch. |
| 5578 | MemoryChunk::kEvacuationCandidateMask, |
| 5579 | eq, |
| 5580 | &ensure_not_white); |
| 5581 | |
| 5582 | __ CheckPageFlag(regs_.object(), |
| 5583 | regs_.scratch1(), // Scratch. |
| 5584 | MemoryChunk::kSkipEvacuationSlotsRecordingMask, |
| 5585 | eq, |
| 5586 | &need_incremental); |
| 5587 | |
| 5588 | __ bind(&ensure_not_white); |
| 5589 | } |
| 5590 | |
| 5591 | // We need extra registers for this, so we push the object and the address |
| 5592 | // register temporarily. |
| 5593 | __ Push(regs_.object(), regs_.address()); |
| 5594 | __ EnsureNotWhite(regs_.scratch0(), // The value. |
| 5595 | regs_.scratch1(), // Scratch. |
| 5596 | regs_.object(), // Scratch. |
| 5597 | regs_.address(), // Scratch. |
| 5598 | &need_incremental_pop_scratch); |
| 5599 | __ Pop(regs_.object(), regs_.address()); |
| 5600 | |
| 5601 | regs_.Restore(masm); |
| 5602 | if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
| 5603 | __ RememberedSetHelper(object_, |
| 5604 | address_, |
| 5605 | value_, |
| 5606 | save_fp_regs_mode_, |
| 5607 | MacroAssembler::kReturnAtEnd); |
| 5608 | } else { |
| 5609 | __ Ret(); |
| 5610 | } |
| 5611 | |
| 5612 | __ bind(&need_incremental_pop_scratch); |
| 5613 | __ Pop(regs_.object(), regs_.address()); |
| 5614 | |
| 5615 | __ bind(&need_incremental); |
| 5616 | |
| 5617 | // Fall through when we need to inform the incremental marker. |
| 5618 | } |
| 5619 | |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5620 | |
| 5621 | void StoreArrayLiteralElementStub::Generate(MacroAssembler* masm) { |
| 5622 | // ----------- S t a t e ------------- |
| 5623 | // -- r0 : element value to store |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5624 | // -- r3 : element index as smi |
dslomov@chromium.org | b752d40 | 2013-06-18 11:54:54 +0000 | [diff] [blame] | 5625 | // -- sp[0] : array literal index in function as smi |
| 5626 | // -- sp[4] : array literal |
| 5627 | // clobbers r1, r2, r4 |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5628 | // ----------------------------------- |
| 5629 | |
| 5630 | Label element_done; |
| 5631 | Label double_elements; |
| 5632 | Label smi_element; |
| 5633 | Label slow_elements; |
| 5634 | Label fast_elements; |
| 5635 | |
dslomov@chromium.org | b752d40 | 2013-06-18 11:54:54 +0000 | [diff] [blame] | 5636 | // Get array literal index, array literal and its map. |
| 5637 | __ ldr(r4, MemOperand(sp, 0 * kPointerSize)); |
| 5638 | __ ldr(r1, MemOperand(sp, 1 * kPointerSize)); |
| 5639 | __ ldr(r2, FieldMemOperand(r1, JSObject::kMapOffset)); |
| 5640 | |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5641 | __ CheckFastElements(r2, r5, &double_elements); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 5642 | // FAST_*_SMI_ELEMENTS or FAST_*_ELEMENTS |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5643 | __ JumpIfSmi(r0, &smi_element); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 5644 | __ CheckFastSmiElements(r2, r5, &fast_elements); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5645 | |
| 5646 | // Store into the array literal requires a elements transition. Call into |
| 5647 | // the runtime. |
| 5648 | __ bind(&slow_elements); |
| 5649 | // call. |
| 5650 | __ Push(r1, r3, r0); |
| 5651 | __ ldr(r5, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| 5652 | __ ldr(r5, FieldMemOperand(r5, JSFunction::kLiteralsOffset)); |
| 5653 | __ Push(r5, r4); |
| 5654 | __ TailCallRuntime(Runtime::kStoreArrayLiteralElement, 5, 1); |
| 5655 | |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 5656 | // Array literal has ElementsKind of FAST_*_ELEMENTS and value is an object. |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5657 | __ bind(&fast_elements); |
| 5658 | __ ldr(r5, FieldMemOperand(r1, JSObject::kElementsOffset)); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 5659 | __ add(r6, r5, Operand::PointerOffsetFromSmiKey(r3)); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5660 | __ add(r6, r6, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 5661 | __ str(r0, MemOperand(r6, 0)); |
| 5662 | // Update the write barrier for the array store. |
| 5663 | __ RecordWrite(r5, r6, r0, kLRHasNotBeenSaved, kDontSaveFPRegs, |
| 5664 | EMIT_REMEMBERED_SET, OMIT_SMI_CHECK); |
| 5665 | __ Ret(); |
| 5666 | |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 5667 | // Array literal has ElementsKind of FAST_*_SMI_ELEMENTS or FAST_*_ELEMENTS, |
| 5668 | // and value is Smi. |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5669 | __ bind(&smi_element); |
| 5670 | __ ldr(r5, FieldMemOperand(r1, JSObject::kElementsOffset)); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 5671 | __ add(r6, r5, Operand::PointerOffsetFromSmiKey(r3)); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5672 | __ str(r0, FieldMemOperand(r6, FixedArray::kHeaderSize)); |
| 5673 | __ Ret(); |
| 5674 | |
| 5675 | // Array literal has ElementsKind of FAST_DOUBLE_ELEMENTS. |
| 5676 | __ bind(&double_elements); |
| 5677 | __ ldr(r5, FieldMemOperand(r1, JSObject::kElementsOffset)); |
jkummerow@chromium.org | fb732b1 | 2013-07-26 10:27:09 +0000 | [diff] [blame] | 5678 | __ StoreNumberToDoubleElements(r0, r3, r5, r6, d0, &slow_elements); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 5679 | __ Ret(); |
| 5680 | } |
| 5681 | |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 5682 | |
mstarzinger@chromium.org | 068ea0a | 2013-01-30 09:39:44 +0000 | [diff] [blame] | 5683 | void StubFailureTrampolineStub::Generate(MacroAssembler* masm) { |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 5684 | CEntryStub ces(1, fp_registers_ ? kSaveFPRegs : kDontSaveFPRegs); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 5685 | __ Call(ces.GetCode(masm->isolate()), RelocInfo::CODE_TARGET); |
mmassi@chromium.org | 2f0efde | 2013-02-06 14:12:58 +0000 | [diff] [blame] | 5686 | int parameter_count_offset = |
| 5687 | StubFailureTrampolineFrame::kCallerStackParameterCountFrameOffset; |
| 5688 | __ ldr(r1, MemOperand(fp, parameter_count_offset)); |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 5689 | if (function_mode_ == JS_FUNCTION_STUB_MODE) { |
| 5690 | __ add(r1, r1, Operand(1)); |
| 5691 | } |
mstarzinger@chromium.org | 068ea0a | 2013-01-30 09:39:44 +0000 | [diff] [blame] | 5692 | masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE); |
mmassi@chromium.org | 2f0efde | 2013-02-06 14:12:58 +0000 | [diff] [blame] | 5693 | __ mov(r1, Operand(r1, LSL, kPointerSizeLog2)); |
| 5694 | __ add(sp, sp, r1); |
mstarzinger@chromium.org | 068ea0a | 2013-01-30 09:39:44 +0000 | [diff] [blame] | 5695 | __ Ret(); |
| 5696 | } |
| 5697 | |
| 5698 | |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 5699 | void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) { |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5700 | if (masm->isolate()->function_entry_hook() != NULL) { |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 5701 | PredictableCodeSizeScope predictable(masm, 4 * Assembler::kInstrSize); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5702 | AllowStubCallsScope allow_stub_calls(masm, true); |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 5703 | ProfileEntryHookStub stub; |
| 5704 | __ push(lr); |
| 5705 | __ CallStub(&stub); |
| 5706 | __ pop(lr); |
| 5707 | } |
| 5708 | } |
| 5709 | |
| 5710 | |
| 5711 | void ProfileEntryHookStub::Generate(MacroAssembler* masm) { |
| 5712 | // The entry hook is a "push lr" instruction, followed by a call. |
| 5713 | const int32_t kReturnAddressDistanceFromFunctionStart = |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 5714 | 3 * Assembler::kInstrSize; |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 5715 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5716 | // This should contain all kCallerSaved registers. |
| 5717 | const RegList kSavedRegs = |
| 5718 | 1 << 0 | // r0 |
| 5719 | 1 << 1 | // r1 |
| 5720 | 1 << 2 | // r2 |
| 5721 | 1 << 3 | // r3 |
| 5722 | 1 << 5 | // r5 |
| 5723 | 1 << 9; // r9 |
| 5724 | // We also save lr, so the count here is one higher than the mask indicates. |
| 5725 | const int32_t kNumSavedRegs = 7; |
| 5726 | |
| 5727 | ASSERT((kCallerSaved & kSavedRegs) == kCallerSaved); |
| 5728 | |
| 5729 | // Save all caller-save registers as this may be called from anywhere. |
| 5730 | __ stm(db_w, sp, kSavedRegs | lr.bit()); |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 5731 | |
| 5732 | // Compute the function's address for the first argument. |
| 5733 | __ sub(r0, lr, Operand(kReturnAddressDistanceFromFunctionStart)); |
| 5734 | |
| 5735 | // The caller's return address is above the saved temporaries. |
| 5736 | // Grab that for the second argument to the hook. |
| 5737 | __ add(r1, sp, Operand(kNumSavedRegs * kPointerSize)); |
| 5738 | |
| 5739 | // Align the stack if necessary. |
| 5740 | int frame_alignment = masm->ActivationFrameAlignment(); |
| 5741 | if (frame_alignment > kPointerSize) { |
| 5742 | __ mov(r5, sp); |
| 5743 | ASSERT(IsPowerOf2(frame_alignment)); |
| 5744 | __ and_(sp, sp, Operand(-frame_alignment)); |
| 5745 | } |
| 5746 | |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 5747 | #if V8_HOST_ARCH_ARM |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5748 | int32_t entry_hook = |
| 5749 | reinterpret_cast<int32_t>(masm->isolate()->function_entry_hook()); |
| 5750 | __ mov(ip, Operand(entry_hook)); |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 5751 | #else |
| 5752 | // Under the simulator we need to indirect the entry hook through a |
| 5753 | // trampoline function at a known address. |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 5754 | // It additionally takes an isolate as a third parameter |
| 5755 | __ mov(r2, Operand(ExternalReference::isolate_address(masm->isolate()))); |
| 5756 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5757 | ApiFunction dispatcher(FUNCTION_ADDR(EntryHookTrampoline)); |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 5758 | __ mov(ip, Operand(ExternalReference(&dispatcher, |
| 5759 | ExternalReference::BUILTIN_CALL, |
| 5760 | masm->isolate()))); |
| 5761 | #endif |
| 5762 | __ Call(ip); |
| 5763 | |
| 5764 | // Restore the stack pointer if needed. |
| 5765 | if (frame_alignment > kPointerSize) { |
| 5766 | __ mov(sp, r5); |
| 5767 | } |
| 5768 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5769 | // Also pop pc to get Ret(0). |
| 5770 | __ ldm(ia_w, sp, kSavedRegs | pc.bit()); |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame] | 5771 | } |
| 5772 | |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5773 | |
| 5774 | template<class T> |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5775 | static void CreateArrayDispatch(MacroAssembler* masm, |
| 5776 | AllocationSiteOverrideMode mode) { |
| 5777 | if (mode == DISABLE_ALLOCATION_SITES) { |
| 5778 | T stub(GetInitialFastElementsKind(), |
| 5779 | CONTEXT_CHECK_REQUIRED, |
| 5780 | mode); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5781 | __ TailCallStub(&stub); |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5782 | } else if (mode == DONT_OVERRIDE) { |
| 5783 | int last_index = GetSequenceIndexFromFastElementsKind( |
| 5784 | TERMINAL_FAST_ELEMENTS_KIND); |
| 5785 | for (int i = 0; i <= last_index; ++i) { |
| 5786 | Label next; |
| 5787 | ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| 5788 | __ cmp(r3, Operand(kind)); |
| 5789 | __ b(ne, &next); |
| 5790 | T stub(kind); |
| 5791 | __ TailCallStub(&stub); |
| 5792 | __ bind(&next); |
| 5793 | } |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5794 | |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5795 | // If we reached this point there is a problem. |
| 5796 | __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| 5797 | } else { |
| 5798 | UNREACHABLE(); |
| 5799 | } |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5800 | } |
| 5801 | |
| 5802 | |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5803 | static void CreateArrayDispatchOneArgument(MacroAssembler* masm, |
| 5804 | AllocationSiteOverrideMode mode) { |
| 5805 | // r2 - type info cell (if mode != DISABLE_ALLOCATION_SITES) |
| 5806 | // r3 - kind (if mode != DISABLE_ALLOCATION_SITES) |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5807 | // r0 - number of arguments |
| 5808 | // r1 - constructor? |
| 5809 | // sp[0] - last argument |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5810 | Label normal_sequence; |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5811 | if (mode == DONT_OVERRIDE) { |
| 5812 | ASSERT(FAST_SMI_ELEMENTS == 0); |
| 5813 | ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 5814 | ASSERT(FAST_ELEMENTS == 2); |
| 5815 | ASSERT(FAST_HOLEY_ELEMENTS == 3); |
| 5816 | ASSERT(FAST_DOUBLE_ELEMENTS == 4); |
| 5817 | ASSERT(FAST_HOLEY_DOUBLE_ELEMENTS == 5); |
| 5818 | |
| 5819 | // is the low bit set? If so, we are holey and that is good. |
| 5820 | __ tst(r3, Operand(1)); |
| 5821 | __ b(ne, &normal_sequence); |
| 5822 | } |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5823 | |
| 5824 | // look at the first argument |
| 5825 | __ ldr(r5, MemOperand(sp, 0)); |
| 5826 | __ cmp(r5, Operand::Zero()); |
| 5827 | __ b(eq, &normal_sequence); |
| 5828 | |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5829 | if (mode == DISABLE_ALLOCATION_SITES) { |
| 5830 | ElementsKind initial = GetInitialFastElementsKind(); |
| 5831 | ElementsKind holey_initial = GetHoleyElementsKind(initial); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5832 | |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5833 | ArraySingleArgumentConstructorStub stub_holey(holey_initial, |
| 5834 | CONTEXT_CHECK_REQUIRED, |
| 5835 | DISABLE_ALLOCATION_SITES); |
| 5836 | __ TailCallStub(&stub_holey); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5837 | |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5838 | __ bind(&normal_sequence); |
| 5839 | ArraySingleArgumentConstructorStub stub(initial, |
| 5840 | CONTEXT_CHECK_REQUIRED, |
| 5841 | DISABLE_ALLOCATION_SITES); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5842 | __ TailCallStub(&stub); |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5843 | } else if (mode == DONT_OVERRIDE) { |
| 5844 | // We are going to create a holey array, but our kind is non-holey. |
| 5845 | // Fix kind and retry (only if we have an allocation site in the cell). |
| 5846 | __ add(r3, r3, Operand(1)); |
| 5847 | __ ldr(r5, FieldMemOperand(r2, Cell::kValueOffset)); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5848 | |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5849 | if (FLAG_debug_code) { |
| 5850 | __ ldr(r5, FieldMemOperand(r5, 0)); |
| 5851 | __ CompareRoot(r5, Heap::kAllocationSiteMapRootIndex); |
| 5852 | __ Assert(eq, kExpectedAllocationSiteInCell); |
| 5853 | __ ldr(r5, FieldMemOperand(r2, Cell::kValueOffset)); |
| 5854 | } |
| 5855 | |
| 5856 | // Save the resulting elements kind in type info |
| 5857 | __ SmiTag(r3); |
| 5858 | __ ldr(r5, FieldMemOperand(r2, Cell::kValueOffset)); |
| 5859 | __ str(r3, FieldMemOperand(r5, AllocationSite::kTransitionInfoOffset)); |
| 5860 | __ SmiUntag(r3); |
| 5861 | |
| 5862 | __ bind(&normal_sequence); |
| 5863 | int last_index = GetSequenceIndexFromFastElementsKind( |
| 5864 | TERMINAL_FAST_ELEMENTS_KIND); |
| 5865 | for (int i = 0; i <= last_index; ++i) { |
| 5866 | Label next; |
| 5867 | ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| 5868 | __ cmp(r3, Operand(kind)); |
| 5869 | __ b(ne, &next); |
| 5870 | ArraySingleArgumentConstructorStub stub(kind); |
| 5871 | __ TailCallStub(&stub); |
| 5872 | __ bind(&next); |
| 5873 | } |
| 5874 | |
| 5875 | // If we reached this point there is a problem. |
| 5876 | __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| 5877 | } else { |
| 5878 | UNREACHABLE(); |
| 5879 | } |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5880 | } |
| 5881 | |
| 5882 | |
| 5883 | template<class T> |
| 5884 | static void ArrayConstructorStubAheadOfTimeHelper(Isolate* isolate) { |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5885 | ElementsKind initial_kind = GetInitialFastElementsKind(); |
| 5886 | ElementsKind initial_holey_kind = GetHoleyElementsKind(initial_kind); |
| 5887 | |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5888 | int to_index = GetSequenceIndexFromFastElementsKind( |
| 5889 | TERMINAL_FAST_ELEMENTS_KIND); |
| 5890 | for (int i = 0; i <= to_index; ++i) { |
| 5891 | ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| 5892 | T stub(kind); |
| 5893 | stub.GetCode(isolate)->set_is_pregenerated(true); |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5894 | if (AllocationSite::GetMode(kind) != DONT_TRACK_ALLOCATION_SITE || |
| 5895 | (!FLAG_track_allocation_sites && |
| 5896 | (kind == initial_kind || kind == initial_holey_kind))) { |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5897 | T stub1(kind, CONTEXT_CHECK_REQUIRED, DISABLE_ALLOCATION_SITES); |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 5898 | stub1.GetCode(isolate)->set_is_pregenerated(true); |
| 5899 | } |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5900 | } |
| 5901 | } |
| 5902 | |
| 5903 | |
| 5904 | void ArrayConstructorStubBase::GenerateStubsAheadOfTime(Isolate* isolate) { |
| 5905 | ArrayConstructorStubAheadOfTimeHelper<ArrayNoArgumentConstructorStub>( |
| 5906 | isolate); |
| 5907 | ArrayConstructorStubAheadOfTimeHelper<ArraySingleArgumentConstructorStub>( |
| 5908 | isolate); |
| 5909 | ArrayConstructorStubAheadOfTimeHelper<ArrayNArgumentsConstructorStub>( |
| 5910 | isolate); |
| 5911 | } |
| 5912 | |
| 5913 | |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 5914 | void InternalArrayConstructorStubBase::GenerateStubsAheadOfTime( |
| 5915 | Isolate* isolate) { |
| 5916 | ElementsKind kinds[2] = { FAST_ELEMENTS, FAST_HOLEY_ELEMENTS }; |
| 5917 | for (int i = 0; i < 2; i++) { |
| 5918 | // For internal arrays we only need a few things |
| 5919 | InternalArrayNoArgumentConstructorStub stubh1(kinds[i]); |
| 5920 | stubh1.GetCode(isolate)->set_is_pregenerated(true); |
| 5921 | InternalArraySingleArgumentConstructorStub stubh2(kinds[i]); |
| 5922 | stubh2.GetCode(isolate)->set_is_pregenerated(true); |
| 5923 | InternalArrayNArgumentsConstructorStub stubh3(kinds[i]); |
| 5924 | stubh3.GetCode(isolate)->set_is_pregenerated(true); |
| 5925 | } |
| 5926 | } |
| 5927 | |
| 5928 | |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5929 | void ArrayConstructorStub::GenerateDispatchToArrayStub( |
| 5930 | MacroAssembler* masm, |
| 5931 | AllocationSiteOverrideMode mode) { |
| 5932 | if (argument_count_ == ANY) { |
| 5933 | Label not_zero_case, not_one_case; |
| 5934 | __ tst(r0, r0); |
| 5935 | __ b(ne, ¬_zero_case); |
| 5936 | CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| 5937 | |
| 5938 | __ bind(¬_zero_case); |
| 5939 | __ cmp(r0, Operand(1)); |
| 5940 | __ b(gt, ¬_one_case); |
| 5941 | CreateArrayDispatchOneArgument(masm, mode); |
| 5942 | |
| 5943 | __ bind(¬_one_case); |
| 5944 | CreateArrayDispatch<ArrayNArgumentsConstructorStub>(masm, mode); |
| 5945 | } else if (argument_count_ == NONE) { |
| 5946 | CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| 5947 | } else if (argument_count_ == ONE) { |
| 5948 | CreateArrayDispatchOneArgument(masm, mode); |
| 5949 | } else if (argument_count_ == MORE_THAN_ONE) { |
| 5950 | CreateArrayDispatch<ArrayNArgumentsConstructorStub>(masm, mode); |
| 5951 | } else { |
| 5952 | UNREACHABLE(); |
| 5953 | } |
| 5954 | } |
| 5955 | |
| 5956 | |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5957 | void ArrayConstructorStub::Generate(MacroAssembler* masm) { |
| 5958 | // ----------- S t a t e ------------- |
| 5959 | // -- r0 : argc (only if argument_count_ == ANY) |
| 5960 | // -- r1 : constructor |
| 5961 | // -- r2 : type info cell |
| 5962 | // -- sp[0] : return address |
| 5963 | // -- sp[4] : last argument |
| 5964 | // ----------------------------------- |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5965 | if (FLAG_debug_code) { |
| 5966 | // The array construct code is only set for the global and natives |
| 5967 | // builtin Array functions which always have maps. |
| 5968 | |
| 5969 | // Initial map for the builtin Array function should be a map. |
| 5970 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 5971 | // Will both indicate a NULL and a Smi. |
| 5972 | __ tst(r3, Operand(kSmiTagMask)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 5973 | __ Assert(ne, kUnexpectedInitialMapForArrayFunction); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5974 | __ CompareObjectType(r3, r3, r4, MAP_TYPE); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 5975 | __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5976 | |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 5977 | // We should either have undefined in ebx or a valid cell |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5978 | Label okay_here; |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 5979 | Handle<Map> cell_map = masm->isolate()->factory()->cell_map(); |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 5980 | __ CompareRoot(r2, Heap::kUndefinedValueRootIndex); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5981 | __ b(eq, &okay_here); |
| 5982 | __ ldr(r3, FieldMemOperand(r2, 0)); |
danno@chromium.org | 4172848 | 2013-06-12 22:31:22 +0000 | [diff] [blame] | 5983 | __ cmp(r3, Operand(cell_map)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 5984 | __ Assert(eq, kExpectedPropertyCellInRegisterEbx); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 5985 | __ bind(&okay_here); |
| 5986 | } |
| 5987 | |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5988 | Label no_info; |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5989 | // Get the elements kind and case on that. |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 5990 | __ CompareRoot(r2, Heap::kUndefinedValueRootIndex); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 5991 | __ b(eq, &no_info); |
| 5992 | __ ldr(r3, FieldMemOperand(r2, Cell::kValueOffset)); |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 5993 | |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 5994 | // If the type cell is undefined, or contains anything other than an |
| 5995 | // AllocationSite, call an array constructor that doesn't use AllocationSites. |
danno@chromium.org | bee5199 | 2013-07-10 14:57:15 +0000 | [diff] [blame] | 5996 | __ ldr(r4, FieldMemOperand(r3, 0)); |
| 5997 | __ CompareRoot(r4, Heap::kAllocationSiteMapRootIndex); |
| 5998 | __ b(ne, &no_info); |
| 5999 | |
| 6000 | __ ldr(r3, FieldMemOperand(r3, AllocationSite::kTransitionInfoOffset)); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 6001 | __ SmiUntag(r3); |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 6002 | GenerateDispatchToArrayStub(masm, DONT_OVERRIDE); |
| 6003 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 6004 | __ bind(&no_info); |
dslomov@chromium.org | 4a35c5a | 2013-09-13 07:28:52 +0000 | [diff] [blame] | 6005 | GenerateDispatchToArrayStub(masm, DISABLE_ALLOCATION_SITES); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 6006 | } |
| 6007 | |
| 6008 | |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 6009 | void InternalArrayConstructorStub::GenerateCase( |
| 6010 | MacroAssembler* masm, ElementsKind kind) { |
| 6011 | Label not_zero_case, not_one_case; |
| 6012 | Label normal_sequence; |
| 6013 | |
| 6014 | __ tst(r0, r0); |
| 6015 | __ b(ne, ¬_zero_case); |
| 6016 | InternalArrayNoArgumentConstructorStub stub0(kind); |
| 6017 | __ TailCallStub(&stub0); |
| 6018 | |
| 6019 | __ bind(¬_zero_case); |
| 6020 | __ cmp(r0, Operand(1)); |
| 6021 | __ b(gt, ¬_one_case); |
| 6022 | |
| 6023 | if (IsFastPackedElementsKind(kind)) { |
| 6024 | // We might need to create a holey array |
| 6025 | // look at the first argument |
| 6026 | __ ldr(r3, MemOperand(sp, 0)); |
| 6027 | __ cmp(r3, Operand::Zero()); |
| 6028 | __ b(eq, &normal_sequence); |
| 6029 | |
| 6030 | InternalArraySingleArgumentConstructorStub |
| 6031 | stub1_holey(GetHoleyElementsKind(kind)); |
| 6032 | __ TailCallStub(&stub1_holey); |
| 6033 | } |
| 6034 | |
| 6035 | __ bind(&normal_sequence); |
| 6036 | InternalArraySingleArgumentConstructorStub stub1(kind); |
| 6037 | __ TailCallStub(&stub1); |
| 6038 | |
| 6039 | __ bind(¬_one_case); |
| 6040 | InternalArrayNArgumentsConstructorStub stubN(kind); |
| 6041 | __ TailCallStub(&stubN); |
| 6042 | } |
| 6043 | |
| 6044 | |
| 6045 | void InternalArrayConstructorStub::Generate(MacroAssembler* masm) { |
| 6046 | // ----------- S t a t e ------------- |
| 6047 | // -- r0 : argc |
| 6048 | // -- r1 : constructor |
| 6049 | // -- sp[0] : return address |
| 6050 | // -- sp[4] : last argument |
| 6051 | // ----------------------------------- |
| 6052 | |
| 6053 | if (FLAG_debug_code) { |
| 6054 | // The array construct code is only set for the global and natives |
| 6055 | // builtin Array functions which always have maps. |
| 6056 | |
| 6057 | // Initial map for the builtin Array function should be a map. |
| 6058 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 6059 | // Will both indicate a NULL and a Smi. |
| 6060 | __ tst(r3, Operand(kSmiTagMask)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 6061 | __ Assert(ne, kUnexpectedInitialMapForArrayFunction); |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 6062 | __ CompareObjectType(r3, r3, r4, MAP_TYPE); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 6063 | __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 6064 | } |
| 6065 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 6066 | // Figure out the right elements kind |
| 6067 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 6068 | // Load the map's "bit field 2" into |result|. We only need the first byte, |
| 6069 | // but the following bit field extraction takes care of that anyway. |
| 6070 | __ ldr(r3, FieldMemOperand(r3, Map::kBitField2Offset)); |
| 6071 | // Retrieve elements_kind from bit field 2. |
| 6072 | __ Ubfx(r3, r3, Map::kElementsKindShift, Map::kElementsKindBitCount); |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 6073 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 6074 | if (FLAG_debug_code) { |
| 6075 | Label done; |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 6076 | __ cmp(r3, Operand(FAST_ELEMENTS)); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 6077 | __ b(eq, &done); |
| 6078 | __ cmp(r3, Operand(FAST_HOLEY_ELEMENTS)); |
| 6079 | __ Assert(eq, |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 6080 | kInvalidElementsKindForInternalArrayOrInternalPackedArray); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 6081 | __ bind(&done); |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 6082 | } |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 6083 | |
| 6084 | Label fast_elements_case; |
| 6085 | __ cmp(r3, Operand(FAST_ELEMENTS)); |
| 6086 | __ b(eq, &fast_elements_case); |
| 6087 | GenerateCase(masm, FAST_HOLEY_ELEMENTS); |
| 6088 | |
| 6089 | __ bind(&fast_elements_case); |
| 6090 | GenerateCase(masm, FAST_ELEMENTS); |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 6091 | } |
| 6092 | |
| 6093 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 6094 | #undef __ |
| 6095 | |
| 6096 | } } // namespace v8::internal |
| 6097 | |
| 6098 | #endif // V8_TARGET_ARCH_ARM |