Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [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 | |
| 30 | #if defined(V8_TARGET_ARCH_X64) |
| 31 | |
| 32 | #include "bootstrapper.h" |
| 33 | #include "code-stubs.h" |
| 34 | #include "regexp-macro-assembler.h" |
| 35 | |
| 36 | namespace v8 { |
| 37 | namespace internal { |
| 38 | |
| 39 | #define __ ACCESS_MASM(masm) |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 40 | |
| 41 | void ToNumberStub::Generate(MacroAssembler* masm) { |
| 42 | // The ToNumber stub takes one argument in eax. |
| 43 | NearLabel check_heap_number, call_builtin; |
| 44 | __ SmiTest(rax); |
| 45 | __ j(not_zero, &check_heap_number); |
| 46 | __ Ret(); |
| 47 | |
| 48 | __ bind(&check_heap_number); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 49 | __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset), |
| 50 | Heap::kHeapNumberMapRootIndex); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 51 | __ j(not_equal, &call_builtin); |
| 52 | __ Ret(); |
| 53 | |
| 54 | __ bind(&call_builtin); |
| 55 | __ pop(rcx); // Pop return address. |
| 56 | __ push(rax); |
| 57 | __ push(rcx); // Push return address. |
| 58 | __ InvokeBuiltin(Builtins::TO_NUMBER, JUMP_FUNCTION); |
| 59 | } |
| 60 | |
| 61 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 62 | void FastNewClosureStub::Generate(MacroAssembler* masm) { |
| 63 | // Create a new closure from the given function info in new |
| 64 | // space. Set the context to the current context in rsi. |
| 65 | Label gc; |
| 66 | __ AllocateInNewSpace(JSFunction::kSize, rax, rbx, rcx, &gc, TAG_OBJECT); |
| 67 | |
| 68 | // Get the function info from the stack. |
| 69 | __ movq(rdx, Operand(rsp, 1 * kPointerSize)); |
| 70 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 71 | int map_index = strict_mode_ == kStrictMode |
| 72 | ? Context::STRICT_MODE_FUNCTION_MAP_INDEX |
| 73 | : Context::FUNCTION_MAP_INDEX; |
| 74 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 75 | // Compute the function map in the current global context and set that |
| 76 | // as the map of the allocated object. |
| 77 | __ movq(rcx, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 78 | __ movq(rcx, FieldOperand(rcx, GlobalObject::kGlobalContextOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 79 | __ movq(rcx, Operand(rcx, Context::SlotOffset(map_index))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 80 | __ movq(FieldOperand(rax, JSObject::kMapOffset), rcx); |
| 81 | |
| 82 | // Initialize the rest of the function. We don't have to update the |
| 83 | // write barrier because the allocated object is in new space. |
| 84 | __ LoadRoot(rbx, Heap::kEmptyFixedArrayRootIndex); |
| 85 | __ LoadRoot(rcx, Heap::kTheHoleValueRootIndex); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 86 | __ LoadRoot(rdi, Heap::kUndefinedValueRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 87 | __ movq(FieldOperand(rax, JSObject::kPropertiesOffset), rbx); |
| 88 | __ movq(FieldOperand(rax, JSObject::kElementsOffset), rbx); |
| 89 | __ movq(FieldOperand(rax, JSFunction::kPrototypeOrInitialMapOffset), rcx); |
| 90 | __ movq(FieldOperand(rax, JSFunction::kSharedFunctionInfoOffset), rdx); |
| 91 | __ movq(FieldOperand(rax, JSFunction::kContextOffset), rsi); |
| 92 | __ movq(FieldOperand(rax, JSFunction::kLiteralsOffset), rbx); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 93 | __ movq(FieldOperand(rax, JSFunction::kNextFunctionLinkOffset), rdi); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 94 | |
| 95 | // Initialize the code pointer in the function to be the one |
| 96 | // found in the shared function info object. |
| 97 | __ movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset)); |
| 98 | __ lea(rdx, FieldOperand(rdx, Code::kHeaderSize)); |
| 99 | __ movq(FieldOperand(rax, JSFunction::kCodeEntryOffset), rdx); |
| 100 | |
| 101 | |
| 102 | // Return and remove the on-stack parameter. |
| 103 | __ ret(1 * kPointerSize); |
| 104 | |
| 105 | // Create a new closure through the slower runtime call. |
| 106 | __ bind(&gc); |
| 107 | __ pop(rcx); // Temporarily remove return address. |
| 108 | __ pop(rdx); |
| 109 | __ push(rsi); |
| 110 | __ push(rdx); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 111 | __ PushRoot(Heap::kFalseValueRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 112 | __ push(rcx); // Restore return address. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 113 | __ TailCallRuntime(Runtime::kNewClosure, 3, 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | |
| 117 | void FastNewContextStub::Generate(MacroAssembler* masm) { |
| 118 | // Try to allocate the context in new space. |
| 119 | Label gc; |
| 120 | int length = slots_ + Context::MIN_CONTEXT_SLOTS; |
| 121 | __ AllocateInNewSpace((length * kPointerSize) + FixedArray::kHeaderSize, |
| 122 | rax, rbx, rcx, &gc, TAG_OBJECT); |
| 123 | |
| 124 | // Get the function from the stack. |
| 125 | __ movq(rcx, Operand(rsp, 1 * kPointerSize)); |
| 126 | |
| 127 | // Setup the object header. |
| 128 | __ LoadRoot(kScratchRegister, Heap::kContextMapRootIndex); |
| 129 | __ movq(FieldOperand(rax, HeapObject::kMapOffset), kScratchRegister); |
| 130 | __ Move(FieldOperand(rax, FixedArray::kLengthOffset), Smi::FromInt(length)); |
| 131 | |
| 132 | // Setup the fixed slots. |
Steve Block | 9fac840 | 2011-05-12 15:51:54 +0100 | [diff] [blame] | 133 | __ Set(rbx, 0); // Set to NULL. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 134 | __ movq(Operand(rax, Context::SlotOffset(Context::CLOSURE_INDEX)), rcx); |
| 135 | __ movq(Operand(rax, Context::SlotOffset(Context::FCONTEXT_INDEX)), rax); |
| 136 | __ movq(Operand(rax, Context::SlotOffset(Context::PREVIOUS_INDEX)), rbx); |
| 137 | __ movq(Operand(rax, Context::SlotOffset(Context::EXTENSION_INDEX)), rbx); |
| 138 | |
| 139 | // Copy the global object from the surrounding context. |
| 140 | __ movq(rbx, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 141 | __ movq(Operand(rax, Context::SlotOffset(Context::GLOBAL_INDEX)), rbx); |
| 142 | |
| 143 | // Initialize the rest of the slots to undefined. |
| 144 | __ LoadRoot(rbx, Heap::kUndefinedValueRootIndex); |
| 145 | for (int i = Context::MIN_CONTEXT_SLOTS; i < length; i++) { |
| 146 | __ movq(Operand(rax, Context::SlotOffset(i)), rbx); |
| 147 | } |
| 148 | |
| 149 | // Return and remove the on-stack parameter. |
| 150 | __ movq(rsi, rax); |
| 151 | __ ret(1 * kPointerSize); |
| 152 | |
| 153 | // Need to collect. Call into runtime system. |
| 154 | __ bind(&gc); |
| 155 | __ TailCallRuntime(Runtime::kNewContext, 1, 1); |
| 156 | } |
| 157 | |
| 158 | |
| 159 | void FastCloneShallowArrayStub::Generate(MacroAssembler* masm) { |
| 160 | // Stack layout on entry: |
| 161 | // |
| 162 | // [rsp + kPointerSize]: constant elements. |
| 163 | // [rsp + (2 * kPointerSize)]: literal index. |
| 164 | // [rsp + (3 * kPointerSize)]: literals array. |
| 165 | |
| 166 | // All sizes here are multiples of kPointerSize. |
| 167 | int elements_size = (length_ > 0) ? FixedArray::SizeFor(length_) : 0; |
| 168 | int size = JSArray::kSize + elements_size; |
| 169 | |
| 170 | // Load boilerplate object into rcx and check if we need to create a |
| 171 | // boilerplate. |
| 172 | Label slow_case; |
| 173 | __ movq(rcx, Operand(rsp, 3 * kPointerSize)); |
| 174 | __ movq(rax, Operand(rsp, 2 * kPointerSize)); |
| 175 | SmiIndex index = masm->SmiToIndex(rax, rax, kPointerSizeLog2); |
| 176 | __ movq(rcx, |
| 177 | FieldOperand(rcx, index.reg, index.scale, FixedArray::kHeaderSize)); |
| 178 | __ CompareRoot(rcx, Heap::kUndefinedValueRootIndex); |
| 179 | __ j(equal, &slow_case); |
| 180 | |
| 181 | if (FLAG_debug_code) { |
| 182 | const char* message; |
| 183 | Heap::RootListIndex expected_map_index; |
| 184 | if (mode_ == CLONE_ELEMENTS) { |
| 185 | message = "Expected (writable) fixed array"; |
| 186 | expected_map_index = Heap::kFixedArrayMapRootIndex; |
| 187 | } else { |
| 188 | ASSERT(mode_ == COPY_ON_WRITE_ELEMENTS); |
| 189 | message = "Expected copy-on-write fixed array"; |
| 190 | expected_map_index = Heap::kFixedCOWArrayMapRootIndex; |
| 191 | } |
| 192 | __ push(rcx); |
| 193 | __ movq(rcx, FieldOperand(rcx, JSArray::kElementsOffset)); |
| 194 | __ CompareRoot(FieldOperand(rcx, HeapObject::kMapOffset), |
| 195 | expected_map_index); |
| 196 | __ Assert(equal, message); |
| 197 | __ pop(rcx); |
| 198 | } |
| 199 | |
| 200 | // Allocate both the JS array and the elements array in one big |
| 201 | // allocation. This avoids multiple limit checks. |
| 202 | __ AllocateInNewSpace(size, rax, rbx, rdx, &slow_case, TAG_OBJECT); |
| 203 | |
| 204 | // Copy the JS array part. |
| 205 | for (int i = 0; i < JSArray::kSize; i += kPointerSize) { |
| 206 | if ((i != JSArray::kElementsOffset) || (length_ == 0)) { |
| 207 | __ movq(rbx, FieldOperand(rcx, i)); |
| 208 | __ movq(FieldOperand(rax, i), rbx); |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | if (length_ > 0) { |
| 213 | // Get hold of the elements array of the boilerplate and setup the |
| 214 | // elements pointer in the resulting object. |
| 215 | __ movq(rcx, FieldOperand(rcx, JSArray::kElementsOffset)); |
| 216 | __ lea(rdx, Operand(rax, JSArray::kSize)); |
| 217 | __ movq(FieldOperand(rax, JSArray::kElementsOffset), rdx); |
| 218 | |
| 219 | // Copy the elements array. |
| 220 | for (int i = 0; i < elements_size; i += kPointerSize) { |
| 221 | __ movq(rbx, FieldOperand(rcx, i)); |
| 222 | __ movq(FieldOperand(rdx, i), rbx); |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | // Return and remove the on-stack parameters. |
| 227 | __ ret(3 * kPointerSize); |
| 228 | |
| 229 | __ bind(&slow_case); |
| 230 | __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1); |
| 231 | } |
| 232 | |
| 233 | |
| 234 | void ToBooleanStub::Generate(MacroAssembler* masm) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 235 | NearLabel false_result, true_result, not_string; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 236 | __ movq(rax, Operand(rsp, 1 * kPointerSize)); |
| 237 | |
| 238 | // 'null' => false. |
| 239 | __ CompareRoot(rax, Heap::kNullValueRootIndex); |
| 240 | __ j(equal, &false_result); |
| 241 | |
| 242 | // Get the map and type of the heap object. |
| 243 | // We don't use CmpObjectType because we manipulate the type field. |
| 244 | __ movq(rdx, FieldOperand(rax, HeapObject::kMapOffset)); |
| 245 | __ movzxbq(rcx, FieldOperand(rdx, Map::kInstanceTypeOffset)); |
| 246 | |
| 247 | // Undetectable => false. |
| 248 | __ movzxbq(rbx, FieldOperand(rdx, Map::kBitFieldOffset)); |
| 249 | __ and_(rbx, Immediate(1 << Map::kIsUndetectable)); |
| 250 | __ j(not_zero, &false_result); |
| 251 | |
| 252 | // JavaScript object => true. |
| 253 | __ cmpq(rcx, Immediate(FIRST_JS_OBJECT_TYPE)); |
| 254 | __ j(above_equal, &true_result); |
| 255 | |
| 256 | // String value => false iff empty. |
| 257 | __ cmpq(rcx, Immediate(FIRST_NONSTRING_TYPE)); |
| 258 | __ j(above_equal, ¬_string); |
| 259 | __ movq(rdx, FieldOperand(rax, String::kLengthOffset)); |
| 260 | __ SmiTest(rdx); |
| 261 | __ j(zero, &false_result); |
| 262 | __ jmp(&true_result); |
| 263 | |
| 264 | __ bind(¬_string); |
| 265 | __ CompareRoot(rdx, Heap::kHeapNumberMapRootIndex); |
| 266 | __ j(not_equal, &true_result); |
| 267 | // HeapNumber => false iff +0, -0, or NaN. |
| 268 | // These three cases set the zero flag when compared to zero using ucomisd. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 269 | __ xorpd(xmm0, xmm0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 270 | __ ucomisd(xmm0, FieldOperand(rax, HeapNumber::kValueOffset)); |
| 271 | __ j(zero, &false_result); |
| 272 | // Fall through to |true_result|. |
| 273 | |
| 274 | // Return 1/0 for true/false in rax. |
| 275 | __ bind(&true_result); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 276 | __ Set(rax, 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 277 | __ ret(1 * kPointerSize); |
| 278 | __ bind(&false_result); |
Steve Block | 9fac840 | 2011-05-12 15:51:54 +0100 | [diff] [blame] | 279 | __ Set(rax, 0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 280 | __ ret(1 * kPointerSize); |
| 281 | } |
| 282 | |
| 283 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 284 | class FloatingPointHelper : public AllStatic { |
| 285 | public: |
| 286 | // Load the operands from rdx and rax into xmm0 and xmm1, as doubles. |
| 287 | // If the operands are not both numbers, jump to not_numbers. |
| 288 | // Leaves rdx and rax unchanged. SmiOperands assumes both are smis. |
| 289 | // NumberOperands assumes both are smis or heap numbers. |
| 290 | static void LoadSSE2SmiOperands(MacroAssembler* masm); |
| 291 | static void LoadSSE2NumberOperands(MacroAssembler* masm); |
| 292 | static void LoadSSE2UnknownOperands(MacroAssembler* masm, |
| 293 | Label* not_numbers); |
| 294 | |
| 295 | // Takes the operands in rdx and rax and loads them as integers in rax |
| 296 | // and rcx. |
| 297 | static void LoadAsIntegers(MacroAssembler* masm, |
| 298 | Label* operand_conversion_failure, |
| 299 | Register heap_number_map); |
| 300 | // As above, but we know the operands to be numbers. In that case, |
| 301 | // conversion can't fail. |
| 302 | static void LoadNumbersAsIntegers(MacroAssembler* masm); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 303 | |
| 304 | // Tries to convert two values to smis losslessly. |
| 305 | // This fails if either argument is not a Smi nor a HeapNumber, |
| 306 | // or if it's a HeapNumber with a value that can't be converted |
| 307 | // losslessly to a Smi. In that case, control transitions to the |
| 308 | // on_not_smis label. |
| 309 | // On success, either control goes to the on_success label (if one is |
| 310 | // provided), or it falls through at the end of the code (if on_success |
| 311 | // is NULL). |
| 312 | // On success, both first and second holds Smi tagged values. |
| 313 | // One of first or second must be non-Smi when entering. |
| 314 | static void NumbersToSmis(MacroAssembler* masm, |
| 315 | Register first, |
| 316 | Register second, |
| 317 | Register scratch1, |
| 318 | Register scratch2, |
| 319 | Register scratch3, |
| 320 | Label* on_success, |
| 321 | Label* on_not_smis); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 322 | }; |
| 323 | |
| 324 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 325 | Handle<Code> GetTypeRecordingBinaryOpStub(int key, |
| 326 | TRBinaryOpIC::TypeInfo type_info, |
| 327 | TRBinaryOpIC::TypeInfo result_type_info) { |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 328 | TypeRecordingBinaryOpStub stub(key, type_info, result_type_info); |
| 329 | return stub.GetCode(); |
| 330 | } |
| 331 | |
| 332 | |
| 333 | void TypeRecordingBinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) { |
| 334 | __ pop(rcx); // Save return address. |
| 335 | __ push(rdx); |
| 336 | __ push(rax); |
| 337 | // Left and right arguments are now on top. |
| 338 | // Push this stub's key. Although the operation and the type info are |
| 339 | // encoded into the key, the encoding is opaque, so push them too. |
| 340 | __ Push(Smi::FromInt(MinorKey())); |
| 341 | __ Push(Smi::FromInt(op_)); |
| 342 | __ Push(Smi::FromInt(operands_type_)); |
| 343 | |
| 344 | __ push(rcx); // Push return address. |
| 345 | |
| 346 | // Patch the caller to an appropriate specialized stub and return the |
| 347 | // operation result to the caller of the stub. |
| 348 | __ TailCallExternalReference( |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 349 | ExternalReference(IC_Utility(IC::kTypeRecordingBinaryOp_Patch), |
| 350 | masm->isolate()), |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 351 | 5, |
| 352 | 1); |
| 353 | } |
| 354 | |
| 355 | |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 356 | void TypeRecordingBinaryOpStub::Generate(MacroAssembler* masm) { |
| 357 | switch (operands_type_) { |
| 358 | case TRBinaryOpIC::UNINITIALIZED: |
| 359 | GenerateTypeTransition(masm); |
| 360 | break; |
| 361 | case TRBinaryOpIC::SMI: |
| 362 | GenerateSmiStub(masm); |
| 363 | break; |
| 364 | case TRBinaryOpIC::INT32: |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 365 | UNREACHABLE(); |
| 366 | // The int32 case is identical to the Smi case. We avoid creating this |
| 367 | // ic state on x64. |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 368 | break; |
| 369 | case TRBinaryOpIC::HEAP_NUMBER: |
| 370 | GenerateHeapNumberStub(masm); |
| 371 | break; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 372 | case TRBinaryOpIC::ODDBALL: |
| 373 | GenerateOddballStub(masm); |
| 374 | break; |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 375 | case TRBinaryOpIC::STRING: |
| 376 | GenerateStringStub(masm); |
| 377 | break; |
| 378 | case TRBinaryOpIC::GENERIC: |
| 379 | GenerateGeneric(masm); |
| 380 | break; |
| 381 | default: |
| 382 | UNREACHABLE(); |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | |
| 387 | const char* TypeRecordingBinaryOpStub::GetName() { |
| 388 | if (name_ != NULL) return name_; |
| 389 | const int kMaxNameLength = 100; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 390 | name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray( |
| 391 | kMaxNameLength); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 392 | if (name_ == NULL) return "OOM"; |
| 393 | const char* op_name = Token::Name(op_); |
| 394 | const char* overwrite_name; |
| 395 | switch (mode_) { |
| 396 | case NO_OVERWRITE: overwrite_name = "Alloc"; break; |
| 397 | case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break; |
| 398 | case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break; |
| 399 | default: overwrite_name = "UnknownOverwrite"; break; |
| 400 | } |
| 401 | |
| 402 | OS::SNPrintF(Vector<char>(name_, kMaxNameLength), |
| 403 | "TypeRecordingBinaryOpStub_%s_%s_%s", |
| 404 | op_name, |
| 405 | overwrite_name, |
| 406 | TRBinaryOpIC::GetName(operands_type_)); |
| 407 | return name_; |
| 408 | } |
| 409 | |
| 410 | |
| 411 | void TypeRecordingBinaryOpStub::GenerateSmiCode(MacroAssembler* masm, |
| 412 | Label* slow, |
| 413 | SmiCodeGenerateHeapNumberResults allow_heapnumber_results) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 414 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 415 | // Arguments to TypeRecordingBinaryOpStub are in rdx and rax. |
| 416 | Register left = rdx; |
| 417 | Register right = rax; |
| 418 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 419 | // We only generate heapnumber answers for overflowing calculations |
| 420 | // for the four basic arithmetic operations and logical right shift by 0. |
| 421 | bool generate_inline_heapnumber_results = |
| 422 | (allow_heapnumber_results == ALLOW_HEAPNUMBER_RESULTS) && |
| 423 | (op_ == Token::ADD || op_ == Token::SUB || |
| 424 | op_ == Token::MUL || op_ == Token::DIV || op_ == Token::SHR); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 425 | |
| 426 | // Smi check of both operands. If op is BIT_OR, the check is delayed |
| 427 | // until after the OR operation. |
| 428 | Label not_smis; |
| 429 | Label use_fp_on_smis; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 430 | Label fail; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 431 | |
| 432 | if (op_ != Token::BIT_OR) { |
| 433 | Comment smi_check_comment(masm, "-- Smi check arguments"); |
| 434 | __ JumpIfNotBothSmi(left, right, ¬_smis); |
| 435 | } |
| 436 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 437 | Label smi_values; |
| 438 | __ bind(&smi_values); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 439 | // Perform the operation. |
| 440 | Comment perform_smi(masm, "-- Perform smi operation"); |
| 441 | switch (op_) { |
| 442 | case Token::ADD: |
| 443 | ASSERT(right.is(rax)); |
| 444 | __ SmiAdd(right, right, left, &use_fp_on_smis); // ADD is commutative. |
| 445 | break; |
| 446 | |
| 447 | case Token::SUB: |
| 448 | __ SmiSub(left, left, right, &use_fp_on_smis); |
| 449 | __ movq(rax, left); |
| 450 | break; |
| 451 | |
| 452 | case Token::MUL: |
| 453 | ASSERT(right.is(rax)); |
| 454 | __ SmiMul(right, right, left, &use_fp_on_smis); // MUL is commutative. |
| 455 | break; |
| 456 | |
| 457 | case Token::DIV: |
| 458 | // SmiDiv will not accept left in rdx or right in rax. |
| 459 | left = rcx; |
| 460 | right = rbx; |
| 461 | __ movq(rbx, rax); |
| 462 | __ movq(rcx, rdx); |
| 463 | __ SmiDiv(rax, left, right, &use_fp_on_smis); |
| 464 | break; |
| 465 | |
| 466 | case Token::MOD: |
| 467 | // SmiMod will not accept left in rdx or right in rax. |
| 468 | left = rcx; |
| 469 | right = rbx; |
| 470 | __ movq(rbx, rax); |
| 471 | __ movq(rcx, rdx); |
| 472 | __ SmiMod(rax, left, right, &use_fp_on_smis); |
| 473 | break; |
| 474 | |
| 475 | case Token::BIT_OR: { |
| 476 | ASSERT(right.is(rax)); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 477 | __ SmiOrIfSmis(right, right, left, ¬_smis); // BIT_OR is commutative. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 478 | break; |
| 479 | } |
| 480 | case Token::BIT_XOR: |
| 481 | ASSERT(right.is(rax)); |
| 482 | __ SmiXor(right, right, left); // BIT_XOR is commutative. |
| 483 | break; |
| 484 | |
| 485 | case Token::BIT_AND: |
| 486 | ASSERT(right.is(rax)); |
| 487 | __ SmiAnd(right, right, left); // BIT_AND is commutative. |
| 488 | break; |
| 489 | |
| 490 | case Token::SHL: |
| 491 | __ SmiShiftLeft(left, left, right); |
| 492 | __ movq(rax, left); |
| 493 | break; |
| 494 | |
| 495 | case Token::SAR: |
| 496 | __ SmiShiftArithmeticRight(left, left, right); |
| 497 | __ movq(rax, left); |
| 498 | break; |
| 499 | |
| 500 | case Token::SHR: |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 501 | __ SmiShiftLogicalRight(left, left, right, &use_fp_on_smis); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 502 | __ movq(rax, left); |
| 503 | break; |
| 504 | |
| 505 | default: |
| 506 | UNREACHABLE(); |
| 507 | } |
| 508 | |
| 509 | // 5. Emit return of result in rax. Some operations have registers pushed. |
| 510 | __ ret(0); |
| 511 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 512 | if (use_fp_on_smis.is_linked()) { |
| 513 | // 6. For some operations emit inline code to perform floating point |
| 514 | // operations on known smis (e.g., if the result of the operation |
| 515 | // overflowed the smi range). |
| 516 | __ bind(&use_fp_on_smis); |
| 517 | if (op_ == Token::DIV || op_ == Token::MOD) { |
| 518 | // Restore left and right to rdx and rax. |
| 519 | __ movq(rdx, rcx); |
| 520 | __ movq(rax, rbx); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 521 | } |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 522 | |
| 523 | if (generate_inline_heapnumber_results) { |
| 524 | __ AllocateHeapNumber(rcx, rbx, slow); |
| 525 | Comment perform_float(masm, "-- Perform float operation on smis"); |
| 526 | if (op_ == Token::SHR) { |
| 527 | __ SmiToInteger32(left, left); |
| 528 | __ cvtqsi2sd(xmm0, left); |
| 529 | } else { |
| 530 | FloatingPointHelper::LoadSSE2SmiOperands(masm); |
| 531 | switch (op_) { |
| 532 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 533 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 534 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 535 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 536 | default: UNREACHABLE(); |
| 537 | } |
| 538 | } |
| 539 | __ movsd(FieldOperand(rcx, HeapNumber::kValueOffset), xmm0); |
| 540 | __ movq(rax, rcx); |
| 541 | __ ret(0); |
| 542 | } else { |
| 543 | __ jmp(&fail); |
| 544 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | // 7. Non-smi operands reach the end of the code generated by |
| 548 | // GenerateSmiCode, and fall through to subsequent code, |
| 549 | // with the operands in rdx and rax. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 550 | // But first we check if non-smi values are HeapNumbers holding |
| 551 | // values that could be smi. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 552 | __ bind(¬_smis); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 553 | Comment done_comment(masm, "-- Enter non-smi code"); |
| 554 | FloatingPointHelper::NumbersToSmis(masm, left, right, rbx, rdi, rcx, |
| 555 | &smi_values, &fail); |
| 556 | __ jmp(&smi_values); |
| 557 | __ bind(&fail); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 558 | } |
| 559 | |
| 560 | |
| 561 | void TypeRecordingBinaryOpStub::GenerateFloatingPointCode( |
| 562 | MacroAssembler* masm, |
| 563 | Label* allocation_failure, |
| 564 | Label* non_numeric_failure) { |
| 565 | switch (op_) { |
| 566 | case Token::ADD: |
| 567 | case Token::SUB: |
| 568 | case Token::MUL: |
| 569 | case Token::DIV: { |
| 570 | FloatingPointHelper::LoadSSE2UnknownOperands(masm, non_numeric_failure); |
| 571 | |
| 572 | switch (op_) { |
| 573 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 574 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 575 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 576 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 577 | default: UNREACHABLE(); |
| 578 | } |
| 579 | GenerateHeapResultAllocation(masm, allocation_failure); |
| 580 | __ movsd(FieldOperand(rax, HeapNumber::kValueOffset), xmm0); |
| 581 | __ ret(0); |
| 582 | break; |
| 583 | } |
| 584 | case Token::MOD: { |
| 585 | // For MOD we jump to the allocation_failure label, to call runtime. |
| 586 | __ jmp(allocation_failure); |
| 587 | break; |
| 588 | } |
| 589 | case Token::BIT_OR: |
| 590 | case Token::BIT_AND: |
| 591 | case Token::BIT_XOR: |
| 592 | case Token::SAR: |
| 593 | case Token::SHL: |
| 594 | case Token::SHR: { |
| 595 | Label non_smi_shr_result; |
| 596 | Register heap_number_map = r9; |
| 597 | __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
| 598 | FloatingPointHelper::LoadAsIntegers(masm, non_numeric_failure, |
| 599 | heap_number_map); |
| 600 | switch (op_) { |
| 601 | case Token::BIT_OR: __ orl(rax, rcx); break; |
| 602 | case Token::BIT_AND: __ andl(rax, rcx); break; |
| 603 | case Token::BIT_XOR: __ xorl(rax, rcx); break; |
| 604 | case Token::SAR: __ sarl_cl(rax); break; |
| 605 | case Token::SHL: __ shll_cl(rax); break; |
| 606 | case Token::SHR: { |
| 607 | __ shrl_cl(rax); |
| 608 | // Check if result is negative. This can only happen for a shift |
| 609 | // by zero. |
| 610 | __ testl(rax, rax); |
| 611 | __ j(negative, &non_smi_shr_result); |
| 612 | break; |
| 613 | } |
| 614 | default: UNREACHABLE(); |
| 615 | } |
| 616 | STATIC_ASSERT(kSmiValueSize == 32); |
| 617 | // Tag smi result and return. |
| 618 | __ Integer32ToSmi(rax, rax); |
| 619 | __ Ret(); |
| 620 | |
| 621 | // Logical shift right can produce an unsigned int32 that is not |
| 622 | // an int32, and so is not in the smi range. Allocate a heap number |
| 623 | // in that case. |
| 624 | if (op_ == Token::SHR) { |
| 625 | __ bind(&non_smi_shr_result); |
| 626 | Label allocation_failed; |
| 627 | __ movl(rbx, rax); // rbx holds result value (uint32 value as int64). |
| 628 | // Allocate heap number in new space. |
| 629 | // Not using AllocateHeapNumber macro in order to reuse |
| 630 | // already loaded heap_number_map. |
| 631 | __ AllocateInNewSpace(HeapNumber::kSize, |
| 632 | rax, |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 633 | rdx, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 634 | no_reg, |
| 635 | &allocation_failed, |
| 636 | TAG_OBJECT); |
| 637 | // Set the map. |
| 638 | if (FLAG_debug_code) { |
| 639 | __ AbortIfNotRootValue(heap_number_map, |
| 640 | Heap::kHeapNumberMapRootIndex, |
| 641 | "HeapNumberMap register clobbered."); |
| 642 | } |
| 643 | __ movq(FieldOperand(rax, HeapObject::kMapOffset), |
| 644 | heap_number_map); |
| 645 | __ cvtqsi2sd(xmm0, rbx); |
| 646 | __ movsd(FieldOperand(rax, HeapNumber::kValueOffset), xmm0); |
| 647 | __ Ret(); |
| 648 | |
| 649 | __ bind(&allocation_failed); |
| 650 | // We need tagged values in rdx and rax for the following code, |
| 651 | // not int32 in rax and rcx. |
| 652 | __ Integer32ToSmi(rax, rcx); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 653 | __ Integer32ToSmi(rdx, rbx); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 654 | __ jmp(allocation_failure); |
| 655 | } |
| 656 | break; |
| 657 | } |
| 658 | default: UNREACHABLE(); break; |
| 659 | } |
| 660 | // No fall-through from this generated code. |
| 661 | if (FLAG_debug_code) { |
| 662 | __ Abort("Unexpected fall-through in " |
| 663 | "TypeRecordingBinaryStub::GenerateFloatingPointCode."); |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | |
| 668 | void TypeRecordingBinaryOpStub::GenerateStringAddCode(MacroAssembler* masm) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 669 | ASSERT(op_ == Token::ADD); |
| 670 | NearLabel left_not_string, call_runtime; |
| 671 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 672 | // Registers containing left and right operands respectively. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 673 | Register left = rdx; |
| 674 | Register right = rax; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 675 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 676 | // Test if left operand is a string. |
| 677 | __ JumpIfSmi(left, &left_not_string); |
| 678 | __ CmpObjectType(left, FIRST_NONSTRING_TYPE, rcx); |
| 679 | __ j(above_equal, &left_not_string); |
| 680 | StringAddStub string_add_left_stub(NO_STRING_CHECK_LEFT_IN_STUB); |
| 681 | GenerateRegisterArgsPush(masm); |
| 682 | __ TailCallStub(&string_add_left_stub); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 683 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 684 | // Left operand is not a string, test right. |
| 685 | __ bind(&left_not_string); |
| 686 | __ JumpIfSmi(right, &call_runtime); |
| 687 | __ CmpObjectType(right, FIRST_NONSTRING_TYPE, rcx); |
| 688 | __ j(above_equal, &call_runtime); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 689 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 690 | StringAddStub string_add_right_stub(NO_STRING_CHECK_RIGHT_IN_STUB); |
| 691 | GenerateRegisterArgsPush(masm); |
| 692 | __ TailCallStub(&string_add_right_stub); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 693 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 694 | // Neither argument is a string. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 695 | __ bind(&call_runtime); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 696 | } |
| 697 | |
| 698 | |
| 699 | void TypeRecordingBinaryOpStub::GenerateCallRuntimeCode(MacroAssembler* masm) { |
| 700 | GenerateRegisterArgsPush(masm); |
| 701 | switch (op_) { |
| 702 | case Token::ADD: |
| 703 | __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| 704 | break; |
| 705 | case Token::SUB: |
| 706 | __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| 707 | break; |
| 708 | case Token::MUL: |
| 709 | __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
| 710 | break; |
| 711 | case Token::DIV: |
| 712 | __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| 713 | break; |
| 714 | case Token::MOD: |
| 715 | __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| 716 | break; |
| 717 | case Token::BIT_OR: |
| 718 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| 719 | break; |
| 720 | case Token::BIT_AND: |
| 721 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| 722 | break; |
| 723 | case Token::BIT_XOR: |
| 724 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| 725 | break; |
| 726 | case Token::SAR: |
| 727 | __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| 728 | break; |
| 729 | case Token::SHL: |
| 730 | __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| 731 | break; |
| 732 | case Token::SHR: |
| 733 | __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| 734 | break; |
| 735 | default: |
| 736 | UNREACHABLE(); |
| 737 | } |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 738 | } |
| 739 | |
| 740 | |
| 741 | void TypeRecordingBinaryOpStub::GenerateSmiStub(MacroAssembler* masm) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 742 | Label call_runtime; |
| 743 | if (result_type_ == TRBinaryOpIC::UNINITIALIZED || |
| 744 | result_type_ == TRBinaryOpIC::SMI) { |
| 745 | // Only allow smi results. |
| 746 | GenerateSmiCode(masm, NULL, NO_HEAPNUMBER_RESULTS); |
| 747 | } else { |
| 748 | // Allow heap number result and don't make a transition if a heap number |
| 749 | // cannot be allocated. |
| 750 | GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS); |
| 751 | } |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 752 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 753 | // Code falls through if the result is not returned as either a smi or heap |
| 754 | // number. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 755 | GenerateTypeTransition(masm); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 756 | |
| 757 | if (call_runtime.is_linked()) { |
| 758 | __ bind(&call_runtime); |
| 759 | GenerateCallRuntimeCode(masm); |
| 760 | } |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 761 | } |
| 762 | |
| 763 | |
| 764 | void TypeRecordingBinaryOpStub::GenerateStringStub(MacroAssembler* masm) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 765 | ASSERT(operands_type_ == TRBinaryOpIC::STRING); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 766 | ASSERT(op_ == Token::ADD); |
| 767 | GenerateStringAddCode(masm); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 768 | // Try to add arguments as strings, otherwise, transition to the generic |
| 769 | // TRBinaryOpIC type. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 770 | GenerateTypeTransition(masm); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 774 | void TypeRecordingBinaryOpStub::GenerateOddballStub(MacroAssembler* masm) { |
| 775 | Label call_runtime; |
| 776 | |
| 777 | if (op_ == Token::ADD) { |
| 778 | // Handle string addition here, because it is the only operation |
| 779 | // that does not do a ToNumber conversion on the operands. |
| 780 | GenerateStringAddCode(masm); |
| 781 | } |
| 782 | |
| 783 | // Convert oddball arguments to numbers. |
| 784 | NearLabel check, done; |
| 785 | __ CompareRoot(rdx, Heap::kUndefinedValueRootIndex); |
| 786 | __ j(not_equal, &check); |
| 787 | if (Token::IsBitOp(op_)) { |
| 788 | __ xor_(rdx, rdx); |
| 789 | } else { |
| 790 | __ LoadRoot(rdx, Heap::kNanValueRootIndex); |
| 791 | } |
| 792 | __ jmp(&done); |
| 793 | __ bind(&check); |
| 794 | __ CompareRoot(rax, Heap::kUndefinedValueRootIndex); |
| 795 | __ j(not_equal, &done); |
| 796 | if (Token::IsBitOp(op_)) { |
| 797 | __ xor_(rax, rax); |
| 798 | } else { |
| 799 | __ LoadRoot(rax, Heap::kNanValueRootIndex); |
| 800 | } |
| 801 | __ bind(&done); |
| 802 | |
| 803 | GenerateHeapNumberStub(masm); |
| 804 | } |
| 805 | |
| 806 | |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 807 | void TypeRecordingBinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 808 | Label gc_required, not_number; |
| 809 | GenerateFloatingPointCode(masm, &gc_required, ¬_number); |
| 810 | |
| 811 | __ bind(¬_number); |
| 812 | GenerateTypeTransition(masm); |
| 813 | |
| 814 | __ bind(&gc_required); |
| 815 | GenerateCallRuntimeCode(masm); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 816 | } |
| 817 | |
| 818 | |
| 819 | void TypeRecordingBinaryOpStub::GenerateGeneric(MacroAssembler* masm) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 820 | Label call_runtime, call_string_add_or_runtime; |
| 821 | |
| 822 | GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS); |
| 823 | |
| 824 | GenerateFloatingPointCode(masm, &call_runtime, &call_string_add_or_runtime); |
| 825 | |
| 826 | __ bind(&call_string_add_or_runtime); |
| 827 | if (op_ == Token::ADD) { |
| 828 | GenerateStringAddCode(masm); |
| 829 | } |
| 830 | |
| 831 | __ bind(&call_runtime); |
| 832 | GenerateCallRuntimeCode(masm); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 833 | } |
| 834 | |
| 835 | |
| 836 | void TypeRecordingBinaryOpStub::GenerateHeapResultAllocation( |
| 837 | MacroAssembler* masm, |
| 838 | Label* alloc_failure) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 839 | Label skip_allocation; |
| 840 | OverwriteMode mode = mode_; |
| 841 | switch (mode) { |
| 842 | case OVERWRITE_LEFT: { |
| 843 | // If the argument in rdx is already an object, we skip the |
| 844 | // allocation of a heap number. |
| 845 | __ JumpIfNotSmi(rdx, &skip_allocation); |
| 846 | // Allocate a heap number for the result. Keep eax and edx intact |
| 847 | // for the possible runtime call. |
| 848 | __ AllocateHeapNumber(rbx, rcx, alloc_failure); |
| 849 | // Now rdx can be overwritten losing one of the arguments as we are |
| 850 | // now done and will not need it any more. |
| 851 | __ movq(rdx, rbx); |
| 852 | __ bind(&skip_allocation); |
| 853 | // Use object in rdx as a result holder |
| 854 | __ movq(rax, rdx); |
| 855 | break; |
| 856 | } |
| 857 | case OVERWRITE_RIGHT: |
| 858 | // If the argument in rax is already an object, we skip the |
| 859 | // allocation of a heap number. |
| 860 | __ JumpIfNotSmi(rax, &skip_allocation); |
| 861 | // Fall through! |
| 862 | case NO_OVERWRITE: |
| 863 | // Allocate a heap number for the result. Keep rax and rdx intact |
| 864 | // for the possible runtime call. |
| 865 | __ AllocateHeapNumber(rbx, rcx, alloc_failure); |
| 866 | // Now rax can be overwritten losing one of the arguments as we are |
| 867 | // now done and will not need it any more. |
| 868 | __ movq(rax, rbx); |
| 869 | __ bind(&skip_allocation); |
| 870 | break; |
| 871 | default: UNREACHABLE(); |
| 872 | } |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 873 | } |
| 874 | |
| 875 | |
| 876 | void TypeRecordingBinaryOpStub::GenerateRegisterArgsPush(MacroAssembler* masm) { |
| 877 | __ pop(rcx); |
| 878 | __ push(rdx); |
| 879 | __ push(rax); |
| 880 | __ push(rcx); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 881 | } |
| 882 | |
| 883 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 884 | void TranscendentalCacheStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 885 | // TAGGED case: |
| 886 | // Input: |
| 887 | // rsp[8]: argument (should be number). |
| 888 | // rsp[0]: return address. |
| 889 | // Output: |
| 890 | // rax: tagged double result. |
| 891 | // UNTAGGED case: |
| 892 | // Input:: |
| 893 | // rsp[0]: return address. |
| 894 | // xmm1: untagged double input argument |
| 895 | // Output: |
| 896 | // xmm1: untagged double result. |
| 897 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 898 | Label runtime_call; |
| 899 | Label runtime_call_clear_stack; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 900 | Label skip_cache; |
| 901 | const bool tagged = (argument_type_ == TAGGED); |
| 902 | if (tagged) { |
| 903 | NearLabel input_not_smi; |
| 904 | NearLabel loaded; |
| 905 | // Test that rax is a number. |
| 906 | __ movq(rax, Operand(rsp, kPointerSize)); |
| 907 | __ JumpIfNotSmi(rax, &input_not_smi); |
| 908 | // Input is a smi. Untag and load it onto the FPU stack. |
| 909 | // Then load the bits of the double into rbx. |
| 910 | __ SmiToInteger32(rax, rax); |
| 911 | __ subq(rsp, Immediate(kDoubleSize)); |
| 912 | __ cvtlsi2sd(xmm1, rax); |
| 913 | __ movsd(Operand(rsp, 0), xmm1); |
| 914 | __ movq(rbx, xmm1); |
| 915 | __ movq(rdx, xmm1); |
| 916 | __ fld_d(Operand(rsp, 0)); |
| 917 | __ addq(rsp, Immediate(kDoubleSize)); |
| 918 | __ jmp(&loaded); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 919 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 920 | __ bind(&input_not_smi); |
| 921 | // Check if input is a HeapNumber. |
| 922 | __ LoadRoot(rbx, Heap::kHeapNumberMapRootIndex); |
| 923 | __ cmpq(rbx, FieldOperand(rax, HeapObject::kMapOffset)); |
| 924 | __ j(not_equal, &runtime_call); |
| 925 | // Input is a HeapNumber. Push it on the FPU stack and load its |
| 926 | // bits into rbx. |
| 927 | __ fld_d(FieldOperand(rax, HeapNumber::kValueOffset)); |
| 928 | __ movq(rbx, FieldOperand(rax, HeapNumber::kValueOffset)); |
| 929 | __ movq(rdx, rbx); |
| 930 | |
| 931 | __ bind(&loaded); |
| 932 | } else { // UNTAGGED. |
| 933 | __ movq(rbx, xmm1); |
| 934 | __ movq(rdx, xmm1); |
| 935 | } |
| 936 | |
| 937 | // ST[0] == double value, if TAGGED. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 938 | // rbx = bits of double value. |
| 939 | // rdx = also bits of double value. |
| 940 | // Compute hash (h is 32 bits, bits are 64 and the shifts are arithmetic): |
| 941 | // h = h0 = bits ^ (bits >> 32); |
| 942 | // h ^= h >> 16; |
| 943 | // h ^= h >> 8; |
| 944 | // h = h & (cacheSize - 1); |
| 945 | // or h = (h0 ^ (h0 >> 8) ^ (h0 >> 16) ^ (h0 >> 24)) & (cacheSize - 1) |
| 946 | __ sar(rdx, Immediate(32)); |
| 947 | __ xorl(rdx, rbx); |
| 948 | __ movl(rcx, rdx); |
| 949 | __ movl(rax, rdx); |
| 950 | __ movl(rdi, rdx); |
| 951 | __ sarl(rdx, Immediate(8)); |
| 952 | __ sarl(rcx, Immediate(16)); |
| 953 | __ sarl(rax, Immediate(24)); |
| 954 | __ xorl(rcx, rdx); |
| 955 | __ xorl(rax, rdi); |
| 956 | __ xorl(rcx, rax); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 957 | ASSERT(IsPowerOf2(TranscendentalCache::SubCache::kCacheSize)); |
| 958 | __ andl(rcx, Immediate(TranscendentalCache::SubCache::kCacheSize - 1)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 959 | |
| 960 | // ST[0] == double value. |
| 961 | // rbx = bits of double value. |
| 962 | // rcx = TranscendentalCache::hash(double value). |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 963 | ExternalReference cache_array = |
| 964 | ExternalReference::transcendental_cache_array_address(masm->isolate()); |
| 965 | __ movq(rax, cache_array); |
| 966 | int cache_array_index = |
| 967 | type_ * sizeof(Isolate::Current()->transcendental_cache()->caches_[0]); |
| 968 | __ movq(rax, Operand(rax, cache_array_index)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 969 | // rax points to the cache for the type type_. |
| 970 | // If NULL, the cache hasn't been initialized yet, so go through runtime. |
| 971 | __ testq(rax, rax); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 972 | __ j(zero, &runtime_call_clear_stack); // Only clears stack if TAGGED. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 973 | #ifdef DEBUG |
| 974 | // Check that the layout of cache elements match expectations. |
| 975 | { // NOLINT - doesn't like a single brace on a line. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 976 | TranscendentalCache::SubCache::Element test_elem[2]; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 977 | char* elem_start = reinterpret_cast<char*>(&test_elem[0]); |
| 978 | char* elem2_start = reinterpret_cast<char*>(&test_elem[1]); |
| 979 | char* elem_in0 = reinterpret_cast<char*>(&(test_elem[0].in[0])); |
| 980 | char* elem_in1 = reinterpret_cast<char*>(&(test_elem[0].in[1])); |
| 981 | char* elem_out = reinterpret_cast<char*>(&(test_elem[0].output)); |
| 982 | // Two uint_32's and a pointer per element. |
| 983 | CHECK_EQ(16, static_cast<int>(elem2_start - elem_start)); |
| 984 | CHECK_EQ(0, static_cast<int>(elem_in0 - elem_start)); |
| 985 | CHECK_EQ(kIntSize, static_cast<int>(elem_in1 - elem_start)); |
| 986 | CHECK_EQ(2 * kIntSize, static_cast<int>(elem_out - elem_start)); |
| 987 | } |
| 988 | #endif |
| 989 | // Find the address of the rcx'th entry in the cache, i.e., &rax[rcx*16]. |
| 990 | __ addl(rcx, rcx); |
| 991 | __ lea(rcx, Operand(rax, rcx, times_8, 0)); |
| 992 | // Check if cache matches: Double value is stored in uint32_t[2] array. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 993 | NearLabel cache_miss; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 994 | __ cmpq(rbx, Operand(rcx, 0)); |
| 995 | __ j(not_equal, &cache_miss); |
| 996 | // Cache hit! |
| 997 | __ movq(rax, Operand(rcx, 2 * kIntSize)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 998 | if (tagged) { |
| 999 | __ fstp(0); // Clear FPU stack. |
| 1000 | __ ret(kPointerSize); |
| 1001 | } else { // UNTAGGED. |
| 1002 | __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| 1003 | __ Ret(); |
| 1004 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1005 | |
| 1006 | __ bind(&cache_miss); |
| 1007 | // Update cache with new value. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1008 | if (tagged) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1009 | __ AllocateHeapNumber(rax, rdi, &runtime_call_clear_stack); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1010 | } else { // UNTAGGED. |
| 1011 | __ AllocateHeapNumber(rax, rdi, &skip_cache); |
| 1012 | __ movsd(FieldOperand(rax, HeapNumber::kValueOffset), xmm1); |
| 1013 | __ fld_d(FieldOperand(rax, HeapNumber::kValueOffset)); |
| 1014 | } |
| 1015 | GenerateOperation(masm); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1016 | __ movq(Operand(rcx, 0), rbx); |
| 1017 | __ movq(Operand(rcx, 2 * kIntSize), rax); |
| 1018 | __ fstp_d(FieldOperand(rax, HeapNumber::kValueOffset)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1019 | if (tagged) { |
| 1020 | __ ret(kPointerSize); |
| 1021 | } else { // UNTAGGED. |
| 1022 | __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| 1023 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1024 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1025 | // Skip cache and return answer directly, only in untagged case. |
| 1026 | __ bind(&skip_cache); |
| 1027 | __ subq(rsp, Immediate(kDoubleSize)); |
| 1028 | __ movsd(Operand(rsp, 0), xmm1); |
| 1029 | __ fld_d(Operand(rsp, 0)); |
| 1030 | GenerateOperation(masm); |
| 1031 | __ fstp_d(Operand(rsp, 0)); |
| 1032 | __ movsd(xmm1, Operand(rsp, 0)); |
| 1033 | __ addq(rsp, Immediate(kDoubleSize)); |
| 1034 | // We return the value in xmm1 without adding it to the cache, but |
| 1035 | // we cause a scavenging GC so that future allocations will succeed. |
| 1036 | __ EnterInternalFrame(); |
| 1037 | // Allocate an unused object bigger than a HeapNumber. |
| 1038 | __ Push(Smi::FromInt(2 * kDoubleSize)); |
| 1039 | __ CallRuntimeSaveDoubles(Runtime::kAllocateInNewSpace); |
| 1040 | __ LeaveInternalFrame(); |
| 1041 | __ Ret(); |
| 1042 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1043 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1044 | // Call runtime, doing whatever allocation and cleanup is necessary. |
| 1045 | if (tagged) { |
| 1046 | __ bind(&runtime_call_clear_stack); |
| 1047 | __ fstp(0); |
| 1048 | __ bind(&runtime_call); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1049 | __ TailCallExternalReference( |
| 1050 | ExternalReference(RuntimeFunction(), masm->isolate()), 1, 1); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1051 | } else { // UNTAGGED. |
| 1052 | __ bind(&runtime_call_clear_stack); |
| 1053 | __ bind(&runtime_call); |
| 1054 | __ AllocateHeapNumber(rax, rdi, &skip_cache); |
| 1055 | __ movsd(FieldOperand(rax, HeapNumber::kValueOffset), xmm1); |
| 1056 | __ EnterInternalFrame(); |
| 1057 | __ push(rax); |
| 1058 | __ CallRuntime(RuntimeFunction(), 1); |
| 1059 | __ LeaveInternalFrame(); |
| 1060 | __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| 1061 | __ Ret(); |
| 1062 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1063 | } |
| 1064 | |
| 1065 | |
| 1066 | Runtime::FunctionId TranscendentalCacheStub::RuntimeFunction() { |
| 1067 | switch (type_) { |
| 1068 | // Add more cases when necessary. |
| 1069 | case TranscendentalCache::SIN: return Runtime::kMath_sin; |
| 1070 | case TranscendentalCache::COS: return Runtime::kMath_cos; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1071 | case TranscendentalCache::LOG: return Runtime::kMath_log; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1072 | default: |
| 1073 | UNIMPLEMENTED(); |
| 1074 | return Runtime::kAbort; |
| 1075 | } |
| 1076 | } |
| 1077 | |
| 1078 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1079 | void TranscendentalCacheStub::GenerateOperation(MacroAssembler* masm) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1080 | // Registers: |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1081 | // rax: Newly allocated HeapNumber, which must be preserved. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1082 | // rbx: Bits of input double. Must be preserved. |
| 1083 | // rcx: Pointer to cache entry. Must be preserved. |
| 1084 | // st(0): Input double |
| 1085 | Label done; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1086 | if (type_ == TranscendentalCache::SIN || type_ == TranscendentalCache::COS) { |
| 1087 | // Both fsin and fcos require arguments in the range +/-2^63 and |
| 1088 | // return NaN for infinities and NaN. They can share all code except |
| 1089 | // the actual fsin/fcos operation. |
| 1090 | Label in_range; |
| 1091 | // If argument is outside the range -2^63..2^63, fsin/cos doesn't |
| 1092 | // work. We must reduce it to the appropriate range. |
| 1093 | __ movq(rdi, rbx); |
| 1094 | // Move exponent and sign bits to low bits. |
| 1095 | __ shr(rdi, Immediate(HeapNumber::kMantissaBits)); |
| 1096 | // Remove sign bit. |
| 1097 | __ andl(rdi, Immediate((1 << HeapNumber::kExponentBits) - 1)); |
| 1098 | int supported_exponent_limit = (63 + HeapNumber::kExponentBias); |
| 1099 | __ cmpl(rdi, Immediate(supported_exponent_limit)); |
| 1100 | __ j(below, &in_range); |
| 1101 | // Check for infinity and NaN. Both return NaN for sin. |
| 1102 | __ cmpl(rdi, Immediate(0x7ff)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1103 | NearLabel non_nan_result; |
| 1104 | __ j(not_equal, &non_nan_result); |
| 1105 | // Input is +/-Infinity or NaN. Result is NaN. |
| 1106 | __ fstp(0); |
| 1107 | __ LoadRoot(kScratchRegister, Heap::kNanValueRootIndex); |
| 1108 | __ fld_d(FieldOperand(kScratchRegister, HeapNumber::kValueOffset)); |
| 1109 | __ jmp(&done); |
| 1110 | |
| 1111 | __ bind(&non_nan_result); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1112 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1113 | // Use fpmod to restrict argument to the range +/-2*PI. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1114 | __ movq(rdi, rax); // Save rax before using fnstsw_ax. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1115 | __ fldpi(); |
| 1116 | __ fadd(0); |
| 1117 | __ fld(1); |
| 1118 | // FPU Stack: input, 2*pi, input. |
| 1119 | { |
| 1120 | Label no_exceptions; |
| 1121 | __ fwait(); |
| 1122 | __ fnstsw_ax(); |
| 1123 | // Clear if Illegal Operand or Zero Division exceptions are set. |
| 1124 | __ testl(rax, Immediate(5)); // #IO and #ZD flags of FPU status word. |
| 1125 | __ j(zero, &no_exceptions); |
| 1126 | __ fnclex(); |
| 1127 | __ bind(&no_exceptions); |
| 1128 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1129 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1130 | // Compute st(0) % st(1) |
| 1131 | { |
| 1132 | NearLabel partial_remainder_loop; |
| 1133 | __ bind(&partial_remainder_loop); |
| 1134 | __ fprem1(); |
| 1135 | __ fwait(); |
| 1136 | __ fnstsw_ax(); |
| 1137 | __ testl(rax, Immediate(0x400)); // Check C2 bit of FPU status word. |
| 1138 | // If C2 is set, computation only has partial result. Loop to |
| 1139 | // continue computation. |
| 1140 | __ j(not_zero, &partial_remainder_loop); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1141 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1142 | // FPU Stack: input, 2*pi, input % 2*pi |
| 1143 | __ fstp(2); |
| 1144 | // FPU Stack: input % 2*pi, 2*pi, |
| 1145 | __ fstp(0); |
| 1146 | // FPU Stack: input % 2*pi |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1147 | __ movq(rax, rdi); // Restore rax, pointer to the new HeapNumber. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1148 | __ bind(&in_range); |
| 1149 | switch (type_) { |
| 1150 | case TranscendentalCache::SIN: |
| 1151 | __ fsin(); |
| 1152 | break; |
| 1153 | case TranscendentalCache::COS: |
| 1154 | __ fcos(); |
| 1155 | break; |
| 1156 | default: |
| 1157 | UNREACHABLE(); |
| 1158 | } |
| 1159 | __ bind(&done); |
| 1160 | } else { |
| 1161 | ASSERT(type_ == TranscendentalCache::LOG); |
| 1162 | __ fldln2(); |
| 1163 | __ fxch(); |
| 1164 | __ fyl2x(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1165 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1166 | } |
| 1167 | |
| 1168 | |
| 1169 | // Get the integer part of a heap number. |
| 1170 | // Overwrites the contents of rdi, rbx and rcx. Result cannot be rdi or rbx. |
| 1171 | void IntegerConvert(MacroAssembler* masm, |
| 1172 | Register result, |
| 1173 | Register source) { |
| 1174 | // Result may be rcx. If result and source are the same register, source will |
| 1175 | // be overwritten. |
| 1176 | ASSERT(!result.is(rdi) && !result.is(rbx)); |
| 1177 | // TODO(lrn): When type info reaches here, if value is a 32-bit integer, use |
| 1178 | // cvttsd2si (32-bit version) directly. |
| 1179 | Register double_exponent = rbx; |
| 1180 | Register double_value = rdi; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1181 | NearLabel done, exponent_63_plus; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1182 | // Get double and extract exponent. |
| 1183 | __ movq(double_value, FieldOperand(source, HeapNumber::kValueOffset)); |
| 1184 | // Clear result preemptively, in case we need to return zero. |
| 1185 | __ xorl(result, result); |
| 1186 | __ movq(xmm0, double_value); // Save copy in xmm0 in case we need it there. |
| 1187 | // Double to remove sign bit, shift exponent down to least significant bits. |
| 1188 | // and subtract bias to get the unshifted, unbiased exponent. |
| 1189 | __ lea(double_exponent, Operand(double_value, double_value, times_1, 0)); |
| 1190 | __ shr(double_exponent, Immediate(64 - HeapNumber::kExponentBits)); |
| 1191 | __ subl(double_exponent, Immediate(HeapNumber::kExponentBias)); |
| 1192 | // Check whether the exponent is too big for a 63 bit unsigned integer. |
| 1193 | __ cmpl(double_exponent, Immediate(63)); |
| 1194 | __ j(above_equal, &exponent_63_plus); |
| 1195 | // Handle exponent range 0..62. |
| 1196 | __ cvttsd2siq(result, xmm0); |
| 1197 | __ jmp(&done); |
| 1198 | |
| 1199 | __ bind(&exponent_63_plus); |
| 1200 | // Exponent negative or 63+. |
| 1201 | __ cmpl(double_exponent, Immediate(83)); |
| 1202 | // If exponent negative or above 83, number contains no significant bits in |
| 1203 | // the range 0..2^31, so result is zero, and rcx already holds zero. |
| 1204 | __ j(above, &done); |
| 1205 | |
| 1206 | // Exponent in rage 63..83. |
| 1207 | // Mantissa * 2^exponent contains bits in the range 2^0..2^31, namely |
| 1208 | // the least significant exponent-52 bits. |
| 1209 | |
| 1210 | // Negate low bits of mantissa if value is negative. |
| 1211 | __ addq(double_value, double_value); // Move sign bit to carry. |
| 1212 | __ sbbl(result, result); // And convert carry to -1 in result register. |
| 1213 | // if scratch2 is negative, do (scratch2-1)^-1, otherwise (scratch2-0)^0. |
| 1214 | __ addl(double_value, result); |
| 1215 | // Do xor in opposite directions depending on where we want the result |
| 1216 | // (depending on whether result is rcx or not). |
| 1217 | |
| 1218 | if (result.is(rcx)) { |
| 1219 | __ xorl(double_value, result); |
| 1220 | // Left shift mantissa by (exponent - mantissabits - 1) to save the |
| 1221 | // bits that have positional values below 2^32 (the extra -1 comes from the |
| 1222 | // doubling done above to move the sign bit into the carry flag). |
| 1223 | __ leal(rcx, Operand(double_exponent, -HeapNumber::kMantissaBits - 1)); |
| 1224 | __ shll_cl(double_value); |
| 1225 | __ movl(result, double_value); |
| 1226 | } else { |
| 1227 | // As the then-branch, but move double-value to result before shifting. |
| 1228 | __ xorl(result, double_value); |
| 1229 | __ leal(rcx, Operand(double_exponent, -HeapNumber::kMantissaBits - 1)); |
| 1230 | __ shll_cl(result); |
| 1231 | } |
| 1232 | |
| 1233 | __ bind(&done); |
| 1234 | } |
| 1235 | |
| 1236 | |
| 1237 | // Input: rdx, rax are the left and right objects of a bit op. |
| 1238 | // Output: rax, rcx are left and right integers for a bit op. |
| 1239 | void FloatingPointHelper::LoadNumbersAsIntegers(MacroAssembler* masm) { |
| 1240 | // Check float operands. |
| 1241 | Label done; |
| 1242 | Label rax_is_smi; |
| 1243 | Label rax_is_object; |
| 1244 | Label rdx_is_object; |
| 1245 | |
| 1246 | __ JumpIfNotSmi(rdx, &rdx_is_object); |
| 1247 | __ SmiToInteger32(rdx, rdx); |
| 1248 | __ JumpIfSmi(rax, &rax_is_smi); |
| 1249 | |
| 1250 | __ bind(&rax_is_object); |
| 1251 | IntegerConvert(masm, rcx, rax); // Uses rdi, rcx and rbx. |
| 1252 | __ jmp(&done); |
| 1253 | |
| 1254 | __ bind(&rdx_is_object); |
| 1255 | IntegerConvert(masm, rdx, rdx); // Uses rdi, rcx and rbx. |
| 1256 | __ JumpIfNotSmi(rax, &rax_is_object); |
| 1257 | __ bind(&rax_is_smi); |
| 1258 | __ SmiToInteger32(rcx, rax); |
| 1259 | |
| 1260 | __ bind(&done); |
| 1261 | __ movl(rax, rdx); |
| 1262 | } |
| 1263 | |
| 1264 | |
| 1265 | // Input: rdx, rax are the left and right objects of a bit op. |
| 1266 | // Output: rax, rcx are left and right integers for a bit op. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1267 | // Jump to conversion_failure: rdx and rax are unchanged. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1268 | void FloatingPointHelper::LoadAsIntegers(MacroAssembler* masm, |
| 1269 | Label* conversion_failure, |
| 1270 | Register heap_number_map) { |
| 1271 | // Check float operands. |
| 1272 | Label arg1_is_object, check_undefined_arg1; |
| 1273 | Label arg2_is_object, check_undefined_arg2; |
| 1274 | Label load_arg2, done; |
| 1275 | |
| 1276 | __ JumpIfNotSmi(rdx, &arg1_is_object); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1277 | __ SmiToInteger32(r8, rdx); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1278 | __ jmp(&load_arg2); |
| 1279 | |
| 1280 | // If the argument is undefined it converts to zero (ECMA-262, section 9.5). |
| 1281 | __ bind(&check_undefined_arg1); |
| 1282 | __ CompareRoot(rdx, Heap::kUndefinedValueRootIndex); |
| 1283 | __ j(not_equal, conversion_failure); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1284 | __ Set(r8, 0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1285 | __ jmp(&load_arg2); |
| 1286 | |
| 1287 | __ bind(&arg1_is_object); |
| 1288 | __ cmpq(FieldOperand(rdx, HeapObject::kMapOffset), heap_number_map); |
| 1289 | __ j(not_equal, &check_undefined_arg1); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1290 | // Get the untagged integer version of the rdx heap number in rcx. |
| 1291 | IntegerConvert(masm, r8, rdx); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1292 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1293 | // Here r8 has the untagged integer, rax has a Smi or a heap number. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1294 | __ bind(&load_arg2); |
| 1295 | // Test if arg2 is a Smi. |
| 1296 | __ JumpIfNotSmi(rax, &arg2_is_object); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1297 | __ SmiToInteger32(rcx, rax); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1298 | __ jmp(&done); |
| 1299 | |
| 1300 | // If the argument is undefined it converts to zero (ECMA-262, section 9.5). |
| 1301 | __ bind(&check_undefined_arg2); |
| 1302 | __ CompareRoot(rax, Heap::kUndefinedValueRootIndex); |
| 1303 | __ j(not_equal, conversion_failure); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1304 | __ Set(rcx, 0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1305 | __ jmp(&done); |
| 1306 | |
| 1307 | __ bind(&arg2_is_object); |
| 1308 | __ cmpq(FieldOperand(rax, HeapObject::kMapOffset), heap_number_map); |
| 1309 | __ j(not_equal, &check_undefined_arg2); |
| 1310 | // Get the untagged integer version of the rax heap number in rcx. |
| 1311 | IntegerConvert(masm, rcx, rax); |
| 1312 | __ bind(&done); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1313 | __ movl(rax, r8); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1314 | } |
| 1315 | |
| 1316 | |
| 1317 | void FloatingPointHelper::LoadSSE2SmiOperands(MacroAssembler* masm) { |
| 1318 | __ SmiToInteger32(kScratchRegister, rdx); |
| 1319 | __ cvtlsi2sd(xmm0, kScratchRegister); |
| 1320 | __ SmiToInteger32(kScratchRegister, rax); |
| 1321 | __ cvtlsi2sd(xmm1, kScratchRegister); |
| 1322 | } |
| 1323 | |
| 1324 | |
| 1325 | void FloatingPointHelper::LoadSSE2NumberOperands(MacroAssembler* masm) { |
| 1326 | Label load_smi_rdx, load_nonsmi_rax, load_smi_rax, done; |
| 1327 | // Load operand in rdx into xmm0. |
| 1328 | __ JumpIfSmi(rdx, &load_smi_rdx); |
| 1329 | __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset)); |
| 1330 | // Load operand in rax into xmm1. |
| 1331 | __ JumpIfSmi(rax, &load_smi_rax); |
| 1332 | __ bind(&load_nonsmi_rax); |
| 1333 | __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| 1334 | __ jmp(&done); |
| 1335 | |
| 1336 | __ bind(&load_smi_rdx); |
| 1337 | __ SmiToInteger32(kScratchRegister, rdx); |
| 1338 | __ cvtlsi2sd(xmm0, kScratchRegister); |
| 1339 | __ JumpIfNotSmi(rax, &load_nonsmi_rax); |
| 1340 | |
| 1341 | __ bind(&load_smi_rax); |
| 1342 | __ SmiToInteger32(kScratchRegister, rax); |
| 1343 | __ cvtlsi2sd(xmm1, kScratchRegister); |
| 1344 | |
| 1345 | __ bind(&done); |
| 1346 | } |
| 1347 | |
| 1348 | |
| 1349 | void FloatingPointHelper::LoadSSE2UnknownOperands(MacroAssembler* masm, |
| 1350 | Label* not_numbers) { |
| 1351 | Label load_smi_rdx, load_nonsmi_rax, load_smi_rax, load_float_rax, done; |
| 1352 | // Load operand in rdx into xmm0, or branch to not_numbers. |
| 1353 | __ LoadRoot(rcx, Heap::kHeapNumberMapRootIndex); |
| 1354 | __ JumpIfSmi(rdx, &load_smi_rdx); |
| 1355 | __ cmpq(FieldOperand(rdx, HeapObject::kMapOffset), rcx); |
| 1356 | __ j(not_equal, not_numbers); // Argument in rdx is not a number. |
| 1357 | __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset)); |
| 1358 | // Load operand in rax into xmm1, or branch to not_numbers. |
| 1359 | __ JumpIfSmi(rax, &load_smi_rax); |
| 1360 | |
| 1361 | __ bind(&load_nonsmi_rax); |
| 1362 | __ cmpq(FieldOperand(rax, HeapObject::kMapOffset), rcx); |
| 1363 | __ j(not_equal, not_numbers); |
| 1364 | __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| 1365 | __ jmp(&done); |
| 1366 | |
| 1367 | __ bind(&load_smi_rdx); |
| 1368 | __ SmiToInteger32(kScratchRegister, rdx); |
| 1369 | __ cvtlsi2sd(xmm0, kScratchRegister); |
| 1370 | __ JumpIfNotSmi(rax, &load_nonsmi_rax); |
| 1371 | |
| 1372 | __ bind(&load_smi_rax); |
| 1373 | __ SmiToInteger32(kScratchRegister, rax); |
| 1374 | __ cvtlsi2sd(xmm1, kScratchRegister); |
| 1375 | __ bind(&done); |
| 1376 | } |
| 1377 | |
| 1378 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1379 | void FloatingPointHelper::NumbersToSmis(MacroAssembler* masm, |
| 1380 | Register first, |
| 1381 | Register second, |
| 1382 | Register scratch1, |
| 1383 | Register scratch2, |
| 1384 | Register scratch3, |
| 1385 | Label* on_success, |
| 1386 | Label* on_not_smis) { |
| 1387 | Register heap_number_map = scratch3; |
| 1388 | Register smi_result = scratch1; |
| 1389 | Label done; |
| 1390 | |
| 1391 | __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
| 1392 | |
| 1393 | NearLabel first_smi, check_second; |
| 1394 | __ JumpIfSmi(first, &first_smi); |
| 1395 | __ cmpq(FieldOperand(first, HeapObject::kMapOffset), heap_number_map); |
| 1396 | __ j(not_equal, on_not_smis); |
| 1397 | // Convert HeapNumber to smi if possible. |
| 1398 | __ movsd(xmm0, FieldOperand(first, HeapNumber::kValueOffset)); |
| 1399 | __ movq(scratch2, xmm0); |
| 1400 | __ cvttsd2siq(smi_result, xmm0); |
| 1401 | // Check if conversion was successful by converting back and |
| 1402 | // comparing to the original double's bits. |
| 1403 | __ cvtlsi2sd(xmm1, smi_result); |
| 1404 | __ movq(kScratchRegister, xmm1); |
| 1405 | __ cmpq(scratch2, kScratchRegister); |
| 1406 | __ j(not_equal, on_not_smis); |
| 1407 | __ Integer32ToSmi(first, smi_result); |
| 1408 | |
| 1409 | __ bind(&check_second); |
| 1410 | __ JumpIfSmi(second, (on_success != NULL) ? on_success : &done); |
| 1411 | __ bind(&first_smi); |
| 1412 | if (FLAG_debug_code) { |
| 1413 | // Second should be non-smi if we get here. |
| 1414 | __ AbortIfSmi(second); |
| 1415 | } |
| 1416 | __ cmpq(FieldOperand(second, HeapObject::kMapOffset), heap_number_map); |
| 1417 | __ j(not_equal, on_not_smis); |
| 1418 | // Convert second to smi, if possible. |
| 1419 | __ movsd(xmm0, FieldOperand(second, HeapNumber::kValueOffset)); |
| 1420 | __ movq(scratch2, xmm0); |
| 1421 | __ cvttsd2siq(smi_result, xmm0); |
| 1422 | __ cvtlsi2sd(xmm1, smi_result); |
| 1423 | __ movq(kScratchRegister, xmm1); |
| 1424 | __ cmpq(scratch2, kScratchRegister); |
| 1425 | __ j(not_equal, on_not_smis); |
| 1426 | __ Integer32ToSmi(second, smi_result); |
| 1427 | if (on_success != NULL) { |
| 1428 | __ jmp(on_success); |
| 1429 | } else { |
| 1430 | __ bind(&done); |
| 1431 | } |
| 1432 | } |
| 1433 | |
| 1434 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1435 | void GenericUnaryOpStub::Generate(MacroAssembler* masm) { |
| 1436 | Label slow, done; |
| 1437 | |
| 1438 | if (op_ == Token::SUB) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1439 | if (include_smi_code_) { |
| 1440 | // Check whether the value is a smi. |
| 1441 | Label try_float; |
| 1442 | __ JumpIfNotSmi(rax, &try_float); |
| 1443 | if (negative_zero_ == kIgnoreNegativeZero) { |
| 1444 | __ SmiCompare(rax, Smi::FromInt(0)); |
| 1445 | __ j(equal, &done); |
| 1446 | } |
| 1447 | __ SmiNeg(rax, rax, &done); |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 1448 | __ jmp(&slow); // zero, if not handled above, and Smi::kMinValue. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1449 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1450 | // Try floating point case. |
| 1451 | __ bind(&try_float); |
| 1452 | } else if (FLAG_debug_code) { |
| 1453 | __ AbortIfSmi(rax); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1454 | } |
| 1455 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1456 | __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset), |
| 1457 | Heap::kHeapNumberMapRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1458 | __ j(not_equal, &slow); |
| 1459 | // Operand is a float, negate its value by flipping sign bit. |
| 1460 | __ movq(rdx, FieldOperand(rax, HeapNumber::kValueOffset)); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1461 | __ Set(kScratchRegister, 0x01); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1462 | __ shl(kScratchRegister, Immediate(63)); |
| 1463 | __ xor_(rdx, kScratchRegister); // Flip sign. |
| 1464 | // rdx is value to store. |
| 1465 | if (overwrite_ == UNARY_OVERWRITE) { |
| 1466 | __ movq(FieldOperand(rax, HeapNumber::kValueOffset), rdx); |
| 1467 | } else { |
| 1468 | __ AllocateHeapNumber(rcx, rbx, &slow); |
| 1469 | // rcx: allocated 'empty' number |
| 1470 | __ movq(FieldOperand(rcx, HeapNumber::kValueOffset), rdx); |
| 1471 | __ movq(rax, rcx); |
| 1472 | } |
| 1473 | } else if (op_ == Token::BIT_NOT) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1474 | if (include_smi_code_) { |
| 1475 | Label try_float; |
| 1476 | __ JumpIfNotSmi(rax, &try_float); |
| 1477 | __ SmiNot(rax, rax); |
| 1478 | __ jmp(&done); |
| 1479 | // Try floating point case. |
| 1480 | __ bind(&try_float); |
| 1481 | } else if (FLAG_debug_code) { |
| 1482 | __ AbortIfSmi(rax); |
| 1483 | } |
| 1484 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1485 | // Check if the operand is a heap number. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1486 | __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset), |
| 1487 | Heap::kHeapNumberMapRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1488 | __ j(not_equal, &slow); |
| 1489 | |
| 1490 | // Convert the heap number in rax to an untagged integer in rcx. |
| 1491 | IntegerConvert(masm, rax, rax); |
| 1492 | |
| 1493 | // Do the bitwise operation and smi tag the result. |
| 1494 | __ notl(rax); |
| 1495 | __ Integer32ToSmi(rax, rax); |
| 1496 | } |
| 1497 | |
| 1498 | // Return from the stub. |
| 1499 | __ bind(&done); |
| 1500 | __ StubReturn(1); |
| 1501 | |
| 1502 | // Handle the slow case by jumping to the JavaScript builtin. |
| 1503 | __ bind(&slow); |
| 1504 | __ pop(rcx); // pop return address |
| 1505 | __ push(rax); |
| 1506 | __ push(rcx); // push return address |
| 1507 | switch (op_) { |
| 1508 | case Token::SUB: |
| 1509 | __ InvokeBuiltin(Builtins::UNARY_MINUS, JUMP_FUNCTION); |
| 1510 | break; |
| 1511 | case Token::BIT_NOT: |
| 1512 | __ InvokeBuiltin(Builtins::BIT_NOT, JUMP_FUNCTION); |
| 1513 | break; |
| 1514 | default: |
| 1515 | UNREACHABLE(); |
| 1516 | } |
| 1517 | } |
| 1518 | |
| 1519 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1520 | void MathPowStub::Generate(MacroAssembler* masm) { |
| 1521 | // Registers are used as follows: |
| 1522 | // rdx = base |
| 1523 | // rax = exponent |
| 1524 | // rcx = temporary, result |
| 1525 | |
| 1526 | Label allocate_return, call_runtime; |
| 1527 | |
| 1528 | // Load input parameters. |
| 1529 | __ movq(rdx, Operand(rsp, 2 * kPointerSize)); |
| 1530 | __ movq(rax, Operand(rsp, 1 * kPointerSize)); |
| 1531 | |
| 1532 | // Save 1 in xmm3 - we need this several times later on. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1533 | __ Set(rcx, 1); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1534 | __ cvtlsi2sd(xmm3, rcx); |
| 1535 | |
| 1536 | Label exponent_nonsmi; |
| 1537 | Label base_nonsmi; |
| 1538 | // If the exponent is a heap number go to that specific case. |
| 1539 | __ JumpIfNotSmi(rax, &exponent_nonsmi); |
| 1540 | __ JumpIfNotSmi(rdx, &base_nonsmi); |
| 1541 | |
| 1542 | // Optimized version when both exponent and base are smis. |
| 1543 | Label powi; |
| 1544 | __ SmiToInteger32(rdx, rdx); |
| 1545 | __ cvtlsi2sd(xmm0, rdx); |
| 1546 | __ jmp(&powi); |
| 1547 | // Exponent is a smi and base is a heapnumber. |
| 1548 | __ bind(&base_nonsmi); |
| 1549 | __ CompareRoot(FieldOperand(rdx, HeapObject::kMapOffset), |
| 1550 | Heap::kHeapNumberMapRootIndex); |
| 1551 | __ j(not_equal, &call_runtime); |
| 1552 | |
| 1553 | __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset)); |
| 1554 | |
| 1555 | // Optimized version of pow if exponent is a smi. |
| 1556 | // xmm0 contains the base. |
| 1557 | __ bind(&powi); |
| 1558 | __ SmiToInteger32(rax, rax); |
| 1559 | |
| 1560 | // Save exponent in base as we need to check if exponent is negative later. |
| 1561 | // We know that base and exponent are in different registers. |
| 1562 | __ movq(rdx, rax); |
| 1563 | |
| 1564 | // Get absolute value of exponent. |
| 1565 | NearLabel no_neg; |
| 1566 | __ cmpl(rax, Immediate(0)); |
| 1567 | __ j(greater_equal, &no_neg); |
| 1568 | __ negl(rax); |
| 1569 | __ bind(&no_neg); |
| 1570 | |
| 1571 | // Load xmm1 with 1. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 1572 | __ movsd(xmm1, xmm3); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1573 | NearLabel while_true; |
| 1574 | NearLabel no_multiply; |
| 1575 | |
| 1576 | __ bind(&while_true); |
| 1577 | __ shrl(rax, Immediate(1)); |
| 1578 | __ j(not_carry, &no_multiply); |
| 1579 | __ mulsd(xmm1, xmm0); |
| 1580 | __ bind(&no_multiply); |
| 1581 | __ mulsd(xmm0, xmm0); |
| 1582 | __ j(not_zero, &while_true); |
| 1583 | |
| 1584 | // Base has the original value of the exponent - if the exponent is |
| 1585 | // negative return 1/result. |
| 1586 | __ testl(rdx, rdx); |
| 1587 | __ j(positive, &allocate_return); |
| 1588 | // Special case if xmm1 has reached infinity. |
| 1589 | __ divsd(xmm3, xmm1); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 1590 | __ movsd(xmm1, xmm3); |
| 1591 | __ xorpd(xmm0, xmm0); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1592 | __ ucomisd(xmm0, xmm1); |
| 1593 | __ j(equal, &call_runtime); |
| 1594 | |
| 1595 | __ jmp(&allocate_return); |
| 1596 | |
| 1597 | // Exponent (or both) is a heapnumber - no matter what we should now work |
| 1598 | // on doubles. |
| 1599 | __ bind(&exponent_nonsmi); |
| 1600 | __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset), |
| 1601 | Heap::kHeapNumberMapRootIndex); |
| 1602 | __ j(not_equal, &call_runtime); |
| 1603 | __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| 1604 | // Test if exponent is nan. |
| 1605 | __ ucomisd(xmm1, xmm1); |
| 1606 | __ j(parity_even, &call_runtime); |
| 1607 | |
| 1608 | NearLabel base_not_smi; |
| 1609 | NearLabel handle_special_cases; |
| 1610 | __ JumpIfNotSmi(rdx, &base_not_smi); |
| 1611 | __ SmiToInteger32(rdx, rdx); |
| 1612 | __ cvtlsi2sd(xmm0, rdx); |
| 1613 | __ jmp(&handle_special_cases); |
| 1614 | |
| 1615 | __ bind(&base_not_smi); |
| 1616 | __ CompareRoot(FieldOperand(rdx, HeapObject::kMapOffset), |
| 1617 | Heap::kHeapNumberMapRootIndex); |
| 1618 | __ j(not_equal, &call_runtime); |
| 1619 | __ movl(rcx, FieldOperand(rdx, HeapNumber::kExponentOffset)); |
| 1620 | __ andl(rcx, Immediate(HeapNumber::kExponentMask)); |
| 1621 | __ cmpl(rcx, Immediate(HeapNumber::kExponentMask)); |
| 1622 | // base is NaN or +/-Infinity |
| 1623 | __ j(greater_equal, &call_runtime); |
| 1624 | __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset)); |
| 1625 | |
| 1626 | // base is in xmm0 and exponent is in xmm1. |
| 1627 | __ bind(&handle_special_cases); |
| 1628 | NearLabel not_minus_half; |
| 1629 | // Test for -0.5. |
| 1630 | // Load xmm2 with -0.5. |
| 1631 | __ movq(rcx, V8_UINT64_C(0xBFE0000000000000), RelocInfo::NONE); |
| 1632 | __ movq(xmm2, rcx); |
| 1633 | // xmm2 now has -0.5. |
| 1634 | __ ucomisd(xmm2, xmm1); |
| 1635 | __ j(not_equal, ¬_minus_half); |
| 1636 | |
| 1637 | // Calculates reciprocal of square root. |
| 1638 | // sqrtsd returns -0 when input is -0. ECMA spec requires +0. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 1639 | __ xorpd(xmm1, xmm1); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1640 | __ addsd(xmm1, xmm0); |
| 1641 | __ sqrtsd(xmm1, xmm1); |
| 1642 | __ divsd(xmm3, xmm1); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 1643 | __ movsd(xmm1, xmm3); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1644 | __ jmp(&allocate_return); |
| 1645 | |
| 1646 | // Test for 0.5. |
| 1647 | __ bind(¬_minus_half); |
| 1648 | // Load xmm2 with 0.5. |
| 1649 | // Since xmm3 is 1 and xmm2 is -0.5 this is simply xmm2 + xmm3. |
| 1650 | __ addsd(xmm2, xmm3); |
| 1651 | // xmm2 now has 0.5. |
| 1652 | __ ucomisd(xmm2, xmm1); |
| 1653 | __ j(not_equal, &call_runtime); |
| 1654 | // Calculates square root. |
| 1655 | // sqrtsd returns -0 when input is -0. ECMA spec requires +0. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 1656 | __ xorpd(xmm1, xmm1); |
| 1657 | __ addsd(xmm1, xmm0); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1658 | __ sqrtsd(xmm1, xmm1); |
| 1659 | |
| 1660 | __ bind(&allocate_return); |
| 1661 | __ AllocateHeapNumber(rcx, rax, &call_runtime); |
| 1662 | __ movsd(FieldOperand(rcx, HeapNumber::kValueOffset), xmm1); |
| 1663 | __ movq(rax, rcx); |
| 1664 | __ ret(2 * kPointerSize); |
| 1665 | |
| 1666 | __ bind(&call_runtime); |
| 1667 | __ TailCallRuntime(Runtime::kMath_pow_cfunction, 2, 1); |
| 1668 | } |
| 1669 | |
| 1670 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1671 | void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) { |
| 1672 | // The key is in rdx and the parameter count is in rax. |
| 1673 | |
| 1674 | // The displacement is used for skipping the frame pointer on the |
| 1675 | // stack. It is the offset of the last parameter (if any) relative |
| 1676 | // to the frame pointer. |
| 1677 | static const int kDisplacement = 1 * kPointerSize; |
| 1678 | |
| 1679 | // Check that the key is a smi. |
| 1680 | Label slow; |
| 1681 | __ JumpIfNotSmi(rdx, &slow); |
| 1682 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1683 | // Check if the calling frame is an arguments adaptor frame. We look at the |
| 1684 | // context offset, and if the frame is not a regular one, then we find a |
| 1685 | // Smi instead of the context. We can't use SmiCompare here, because that |
| 1686 | // only works for comparing two smis. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1687 | Label adaptor; |
| 1688 | __ movq(rbx, Operand(rbp, StandardFrameConstants::kCallerFPOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1689 | __ Cmp(Operand(rbx, StandardFrameConstants::kContextOffset), |
| 1690 | Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1691 | __ j(equal, &adaptor); |
| 1692 | |
| 1693 | // Check index against formal parameters count limit passed in |
| 1694 | // through register rax. Use unsigned comparison to get negative |
| 1695 | // check for free. |
| 1696 | __ cmpq(rdx, rax); |
| 1697 | __ j(above_equal, &slow); |
| 1698 | |
| 1699 | // Read the argument from the stack and return it. |
| 1700 | SmiIndex index = masm->SmiToIndex(rax, rax, kPointerSizeLog2); |
| 1701 | __ lea(rbx, Operand(rbp, index.reg, index.scale, 0)); |
| 1702 | index = masm->SmiToNegativeIndex(rdx, rdx, kPointerSizeLog2); |
| 1703 | __ movq(rax, Operand(rbx, index.reg, index.scale, kDisplacement)); |
| 1704 | __ Ret(); |
| 1705 | |
| 1706 | // Arguments adaptor case: Check index against actual arguments |
| 1707 | // limit found in the arguments adaptor frame. Use unsigned |
| 1708 | // comparison to get negative check for free. |
| 1709 | __ bind(&adaptor); |
| 1710 | __ movq(rcx, Operand(rbx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 1711 | __ cmpq(rdx, rcx); |
| 1712 | __ j(above_equal, &slow); |
| 1713 | |
| 1714 | // Read the argument from the stack and return it. |
| 1715 | index = masm->SmiToIndex(rax, rcx, kPointerSizeLog2); |
| 1716 | __ lea(rbx, Operand(rbx, index.reg, index.scale, 0)); |
| 1717 | index = masm->SmiToNegativeIndex(rdx, rdx, kPointerSizeLog2); |
| 1718 | __ movq(rax, Operand(rbx, index.reg, index.scale, kDisplacement)); |
| 1719 | __ Ret(); |
| 1720 | |
| 1721 | // Slow-case: Handle non-smi or out-of-bounds access to arguments |
| 1722 | // by calling the runtime system. |
| 1723 | __ bind(&slow); |
| 1724 | __ pop(rbx); // Return address. |
| 1725 | __ push(rdx); |
| 1726 | __ push(rbx); |
| 1727 | __ TailCallRuntime(Runtime::kGetArgumentsProperty, 1, 1); |
| 1728 | } |
| 1729 | |
| 1730 | |
| 1731 | void ArgumentsAccessStub::GenerateNewObject(MacroAssembler* masm) { |
| 1732 | // rsp[0] : return address |
| 1733 | // rsp[8] : number of parameters |
| 1734 | // rsp[16] : receiver displacement |
| 1735 | // rsp[24] : function |
| 1736 | |
| 1737 | // The displacement is used for skipping the return address and the |
| 1738 | // frame pointer on the stack. It is the offset of the last |
| 1739 | // parameter (if any) relative to the frame pointer. |
| 1740 | static const int kDisplacement = 2 * kPointerSize; |
| 1741 | |
| 1742 | // Check if the calling frame is an arguments adaptor frame. |
| 1743 | Label adaptor_frame, try_allocate, runtime; |
| 1744 | __ movq(rdx, Operand(rbp, StandardFrameConstants::kCallerFPOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1745 | __ Cmp(Operand(rdx, StandardFrameConstants::kContextOffset), |
| 1746 | Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1747 | __ j(equal, &adaptor_frame); |
| 1748 | |
| 1749 | // Get the length from the frame. |
| 1750 | __ SmiToInteger32(rcx, Operand(rsp, 1 * kPointerSize)); |
| 1751 | __ jmp(&try_allocate); |
| 1752 | |
| 1753 | // Patch the arguments.length and the parameters pointer. |
| 1754 | __ bind(&adaptor_frame); |
| 1755 | __ SmiToInteger32(rcx, |
| 1756 | Operand(rdx, |
| 1757 | ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 1758 | // Space on stack must already hold a smi. |
| 1759 | __ Integer32ToSmiField(Operand(rsp, 1 * kPointerSize), rcx); |
| 1760 | // Do not clobber the length index for the indexing operation since |
| 1761 | // it is used compute the size for allocation later. |
| 1762 | __ lea(rdx, Operand(rdx, rcx, times_pointer_size, kDisplacement)); |
| 1763 | __ movq(Operand(rsp, 2 * kPointerSize), rdx); |
| 1764 | |
| 1765 | // Try the new space allocation. Start out with computing the size of |
| 1766 | // the arguments object and the elements array. |
| 1767 | Label add_arguments_object; |
| 1768 | __ bind(&try_allocate); |
| 1769 | __ testl(rcx, rcx); |
| 1770 | __ j(zero, &add_arguments_object); |
| 1771 | __ leal(rcx, Operand(rcx, times_pointer_size, FixedArray::kHeaderSize)); |
| 1772 | __ bind(&add_arguments_object); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1773 | __ addl(rcx, Immediate(GetArgumentsObjectSize())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1774 | |
| 1775 | // Do the allocation of both objects in one go. |
| 1776 | __ AllocateInNewSpace(rcx, rax, rdx, rbx, &runtime, TAG_OBJECT); |
| 1777 | |
| 1778 | // Get the arguments boilerplate from the current (global) context. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1779 | __ movq(rdi, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 1780 | __ movq(rdi, FieldOperand(rdi, GlobalObject::kGlobalContextOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1781 | __ movq(rdi, Operand(rdi, |
| 1782 | Context::SlotOffset(GetArgumentsBoilerplateIndex()))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1783 | |
| 1784 | // Copy the JS object part. |
| 1785 | STATIC_ASSERT(JSObject::kHeaderSize == 3 * kPointerSize); |
| 1786 | __ movq(kScratchRegister, FieldOperand(rdi, 0 * kPointerSize)); |
| 1787 | __ movq(rdx, FieldOperand(rdi, 1 * kPointerSize)); |
| 1788 | __ movq(rbx, FieldOperand(rdi, 2 * kPointerSize)); |
| 1789 | __ movq(FieldOperand(rax, 0 * kPointerSize), kScratchRegister); |
| 1790 | __ movq(FieldOperand(rax, 1 * kPointerSize), rdx); |
| 1791 | __ movq(FieldOperand(rax, 2 * kPointerSize), rbx); |
| 1792 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1793 | if (type_ == NEW_NON_STRICT) { |
| 1794 | // Setup the callee in-object property. |
| 1795 | ASSERT(Heap::kArgumentsCalleeIndex == 1); |
| 1796 | __ movq(kScratchRegister, Operand(rsp, 3 * kPointerSize)); |
| 1797 | __ movq(FieldOperand(rax, JSObject::kHeaderSize + |
| 1798 | Heap::kArgumentsCalleeIndex * kPointerSize), |
| 1799 | kScratchRegister); |
| 1800 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1801 | |
| 1802 | // Get the length (smi tagged) and set that as an in-object property too. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1803 | ASSERT(Heap::kArgumentsLengthIndex == 0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1804 | __ movq(rcx, Operand(rsp, 1 * kPointerSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1805 | __ movq(FieldOperand(rax, JSObject::kHeaderSize + |
| 1806 | Heap::kArgumentsLengthIndex * kPointerSize), |
| 1807 | rcx); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1808 | |
| 1809 | // If there are no actual arguments, we're done. |
| 1810 | Label done; |
| 1811 | __ SmiTest(rcx); |
| 1812 | __ j(zero, &done); |
| 1813 | |
| 1814 | // Get the parameters pointer from the stack and untag the length. |
| 1815 | __ movq(rdx, Operand(rsp, 2 * kPointerSize)); |
| 1816 | |
| 1817 | // Setup the elements pointer in the allocated arguments object and |
| 1818 | // initialize the header in the elements fixed array. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1819 | __ lea(rdi, Operand(rax, GetArgumentsObjectSize())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1820 | __ movq(FieldOperand(rax, JSObject::kElementsOffset), rdi); |
| 1821 | __ LoadRoot(kScratchRegister, Heap::kFixedArrayMapRootIndex); |
| 1822 | __ movq(FieldOperand(rdi, FixedArray::kMapOffset), kScratchRegister); |
| 1823 | __ movq(FieldOperand(rdi, FixedArray::kLengthOffset), rcx); |
| 1824 | __ SmiToInteger32(rcx, rcx); // Untag length for the loop below. |
| 1825 | |
| 1826 | // Copy the fixed array slots. |
| 1827 | Label loop; |
| 1828 | __ bind(&loop); |
| 1829 | __ movq(kScratchRegister, Operand(rdx, -1 * kPointerSize)); // Skip receiver. |
| 1830 | __ movq(FieldOperand(rdi, FixedArray::kHeaderSize), kScratchRegister); |
| 1831 | __ addq(rdi, Immediate(kPointerSize)); |
| 1832 | __ subq(rdx, Immediate(kPointerSize)); |
| 1833 | __ decl(rcx); |
| 1834 | __ j(not_zero, &loop); |
| 1835 | |
| 1836 | // Return and remove the on-stack parameters. |
| 1837 | __ bind(&done); |
| 1838 | __ ret(3 * kPointerSize); |
| 1839 | |
| 1840 | // Do the runtime call to allocate the arguments object. |
| 1841 | __ bind(&runtime); |
| 1842 | __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); |
| 1843 | } |
| 1844 | |
| 1845 | |
| 1846 | void RegExpExecStub::Generate(MacroAssembler* masm) { |
| 1847 | // Just jump directly to runtime if native RegExp is not selected at compile |
| 1848 | // time or if regexp entry in generated code is turned off runtime switch or |
| 1849 | // at compilation. |
| 1850 | #ifdef V8_INTERPRETED_REGEXP |
| 1851 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 1852 | #else // V8_INTERPRETED_REGEXP |
| 1853 | if (!FLAG_regexp_entry_native) { |
| 1854 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 1855 | return; |
| 1856 | } |
| 1857 | |
| 1858 | // Stack frame on entry. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1859 | // rsp[0]: return address |
| 1860 | // rsp[8]: last_match_info (expected JSArray) |
| 1861 | // rsp[16]: previous index |
| 1862 | // rsp[24]: subject string |
| 1863 | // rsp[32]: JSRegExp object |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1864 | |
| 1865 | static const int kLastMatchInfoOffset = 1 * kPointerSize; |
| 1866 | static const int kPreviousIndexOffset = 2 * kPointerSize; |
| 1867 | static const int kSubjectOffset = 3 * kPointerSize; |
| 1868 | static const int kJSRegExpOffset = 4 * kPointerSize; |
| 1869 | |
| 1870 | Label runtime; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1871 | // Ensure that a RegExp stack is allocated. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1872 | Isolate* isolate = masm->isolate(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1873 | ExternalReference address_of_regexp_stack_memory_address = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1874 | ExternalReference::address_of_regexp_stack_memory_address(isolate); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1875 | ExternalReference address_of_regexp_stack_memory_size = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1876 | ExternalReference::address_of_regexp_stack_memory_size(isolate); |
| 1877 | __ Load(kScratchRegister, address_of_regexp_stack_memory_size); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1878 | __ testq(kScratchRegister, kScratchRegister); |
| 1879 | __ j(zero, &runtime); |
| 1880 | |
| 1881 | |
| 1882 | // Check that the first argument is a JSRegExp object. |
| 1883 | __ movq(rax, Operand(rsp, kJSRegExpOffset)); |
| 1884 | __ JumpIfSmi(rax, &runtime); |
| 1885 | __ CmpObjectType(rax, JS_REGEXP_TYPE, kScratchRegister); |
| 1886 | __ j(not_equal, &runtime); |
| 1887 | // Check that the RegExp has been compiled (data contains a fixed array). |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1888 | __ movq(rax, FieldOperand(rax, JSRegExp::kDataOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1889 | if (FLAG_debug_code) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1890 | Condition is_smi = masm->CheckSmi(rax); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1891 | __ Check(NegateCondition(is_smi), |
| 1892 | "Unexpected type for RegExp data, FixedArray expected"); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1893 | __ CmpObjectType(rax, FIXED_ARRAY_TYPE, kScratchRegister); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1894 | __ Check(equal, "Unexpected type for RegExp data, FixedArray expected"); |
| 1895 | } |
| 1896 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1897 | // rax: RegExp data (FixedArray) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1898 | // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1899 | __ SmiToInteger32(rbx, FieldOperand(rax, JSRegExp::kDataTagOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1900 | __ cmpl(rbx, Immediate(JSRegExp::IRREGEXP)); |
| 1901 | __ j(not_equal, &runtime); |
| 1902 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1903 | // rax: RegExp data (FixedArray) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1904 | // Check that the number of captures fit in the static offsets vector buffer. |
| 1905 | __ SmiToInteger32(rdx, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1906 | FieldOperand(rax, JSRegExp::kIrregexpCaptureCountOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1907 | // Calculate number of capture registers (number_of_captures + 1) * 2. |
| 1908 | __ leal(rdx, Operand(rdx, rdx, times_1, 2)); |
| 1909 | // Check that the static offsets vector buffer is large enough. |
| 1910 | __ cmpl(rdx, Immediate(OffsetsVector::kStaticOffsetsVectorSize)); |
| 1911 | __ j(above, &runtime); |
| 1912 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1913 | // rax: RegExp data (FixedArray) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1914 | // rdx: Number of capture registers |
| 1915 | // Check that the second argument is a string. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1916 | __ movq(rdi, Operand(rsp, kSubjectOffset)); |
| 1917 | __ JumpIfSmi(rdi, &runtime); |
| 1918 | Condition is_string = masm->IsObjectStringType(rdi, rbx, rbx); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1919 | __ j(NegateCondition(is_string), &runtime); |
| 1920 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1921 | // rdi: Subject string. |
| 1922 | // rax: RegExp data (FixedArray). |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1923 | // rdx: Number of capture registers. |
| 1924 | // Check that the third argument is a positive smi less than the string |
| 1925 | // length. A negative value will be greater (unsigned comparison). |
| 1926 | __ movq(rbx, Operand(rsp, kPreviousIndexOffset)); |
| 1927 | __ JumpIfNotSmi(rbx, &runtime); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1928 | __ SmiCompare(rbx, FieldOperand(rdi, String::kLengthOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1929 | __ j(above_equal, &runtime); |
| 1930 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1931 | // rax: RegExp data (FixedArray) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1932 | // rdx: Number of capture registers |
| 1933 | // Check that the fourth object is a JSArray object. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1934 | __ movq(rdi, Operand(rsp, kLastMatchInfoOffset)); |
| 1935 | __ JumpIfSmi(rdi, &runtime); |
| 1936 | __ CmpObjectType(rdi, JS_ARRAY_TYPE, kScratchRegister); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1937 | __ j(not_equal, &runtime); |
| 1938 | // Check that the JSArray is in fast case. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1939 | __ movq(rbx, FieldOperand(rdi, JSArray::kElementsOffset)); |
| 1940 | __ movq(rdi, FieldOperand(rbx, HeapObject::kMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1941 | __ CompareRoot(FieldOperand(rbx, HeapObject::kMapOffset), |
| 1942 | Heap::kFixedArrayMapRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1943 | __ j(not_equal, &runtime); |
| 1944 | // Check that the last match info has space for the capture registers and the |
| 1945 | // additional information. Ensure no overflow in add. |
| 1946 | STATIC_ASSERT(FixedArray::kMaxLength < kMaxInt - FixedArray::kLengthOffset); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1947 | __ SmiToInteger32(rdi, FieldOperand(rbx, FixedArray::kLengthOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1948 | __ addl(rdx, Immediate(RegExpImpl::kLastMatchOverhead)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1949 | __ cmpl(rdx, rdi); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1950 | __ j(greater, &runtime); |
| 1951 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1952 | // rax: RegExp data (FixedArray) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1953 | // Check the representation and encoding of the subject string. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1954 | NearLabel seq_ascii_string, seq_two_byte_string, check_code; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1955 | __ movq(rdi, Operand(rsp, kSubjectOffset)); |
| 1956 | __ movq(rbx, FieldOperand(rdi, HeapObject::kMapOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1957 | __ movzxbl(rbx, FieldOperand(rbx, Map::kInstanceTypeOffset)); |
| 1958 | // First check for flat two byte string. |
| 1959 | __ andb(rbx, Immediate( |
| 1960 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask)); |
| 1961 | STATIC_ASSERT((kStringTag | kSeqStringTag | kTwoByteStringTag) == 0); |
| 1962 | __ j(zero, &seq_two_byte_string); |
| 1963 | // Any other flat string must be a flat ascii string. |
| 1964 | __ testb(rbx, Immediate(kIsNotStringMask | kStringRepresentationMask)); |
| 1965 | __ j(zero, &seq_ascii_string); |
| 1966 | |
| 1967 | // Check for flat cons string. |
| 1968 | // A flat cons string is a cons string where the second part is the empty |
| 1969 | // string. In that case the subject string is just the first part of the cons |
| 1970 | // string. Also in this case the first part of the cons string is known to be |
| 1971 | // a sequential string or an external string. |
| 1972 | STATIC_ASSERT(kExternalStringTag !=0); |
| 1973 | STATIC_ASSERT((kConsStringTag & kExternalStringTag) == 0); |
| 1974 | __ testb(rbx, Immediate(kIsNotStringMask | kExternalStringTag)); |
| 1975 | __ j(not_zero, &runtime); |
| 1976 | // String is a cons string. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1977 | __ CompareRoot(FieldOperand(rdi, ConsString::kSecondOffset), |
| 1978 | Heap::kEmptyStringRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1979 | __ j(not_equal, &runtime); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1980 | __ movq(rdi, FieldOperand(rdi, ConsString::kFirstOffset)); |
| 1981 | __ movq(rbx, FieldOperand(rdi, HeapObject::kMapOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1982 | // String is a cons string with empty second part. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1983 | // rdi: first part of cons string. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1984 | // rbx: map of first part of cons string. |
| 1985 | // Is first part a flat two byte string? |
| 1986 | __ testb(FieldOperand(rbx, Map::kInstanceTypeOffset), |
| 1987 | Immediate(kStringRepresentationMask | kStringEncodingMask)); |
| 1988 | STATIC_ASSERT((kSeqStringTag | kTwoByteStringTag) == 0); |
| 1989 | __ j(zero, &seq_two_byte_string); |
| 1990 | // Any other flat string must be ascii. |
| 1991 | __ testb(FieldOperand(rbx, Map::kInstanceTypeOffset), |
| 1992 | Immediate(kStringRepresentationMask)); |
| 1993 | __ j(not_zero, &runtime); |
| 1994 | |
| 1995 | __ bind(&seq_ascii_string); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1996 | // rdi: subject string (sequential ascii) |
| 1997 | // rax: RegExp data (FixedArray) |
| 1998 | __ movq(r11, FieldOperand(rax, JSRegExp::kDataAsciiCodeOffset)); |
| 1999 | __ Set(rcx, 1); // Type is ascii. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2000 | __ jmp(&check_code); |
| 2001 | |
| 2002 | __ bind(&seq_two_byte_string); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2003 | // rdi: subject string (flat two-byte) |
| 2004 | // rax: RegExp data (FixedArray) |
| 2005 | __ movq(r11, FieldOperand(rax, JSRegExp::kDataUC16CodeOffset)); |
| 2006 | __ Set(rcx, 0); // Type is two byte. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2007 | |
| 2008 | __ bind(&check_code); |
| 2009 | // Check that the irregexp code has been generated for the actual string |
| 2010 | // encoding. If it has, the field contains a code object otherwise it contains |
| 2011 | // the hole. |
| 2012 | __ CmpObjectType(r11, CODE_TYPE, kScratchRegister); |
| 2013 | __ j(not_equal, &runtime); |
| 2014 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2015 | // rdi: subject string |
| 2016 | // rcx: encoding of subject string (1 if ascii, 0 if two_byte); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2017 | // r11: code |
| 2018 | // Load used arguments before starting to push arguments for call to native |
| 2019 | // RegExp code to avoid handling changing stack height. |
| 2020 | __ SmiToInteger64(rbx, Operand(rsp, kPreviousIndexOffset)); |
| 2021 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2022 | // rdi: subject string |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2023 | // rbx: previous index |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2024 | // rcx: encoding of subject string (1 if ascii 0 if two_byte); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2025 | // r11: code |
| 2026 | // All checks done. Now push arguments for native regexp code. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2027 | Counters* counters = masm->isolate()->counters(); |
| 2028 | __ IncrementCounter(counters->regexp_entry_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2029 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2030 | // Isolates: note we add an additional parameter here (isolate pointer). |
| 2031 | static const int kRegExpExecuteArguments = 8; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2032 | int argument_slots_on_stack = |
| 2033 | masm->ArgumentStackSlotsForCFunctionCall(kRegExpExecuteArguments); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2034 | __ EnterApiExitFrame(argument_slots_on_stack); |
| 2035 | |
| 2036 | // Argument 8: Pass current isolate address. |
| 2037 | // __ movq(Operand(rsp, (argument_slots_on_stack - 1) * kPointerSize), |
| 2038 | // Immediate(ExternalReference::isolate_address())); |
| 2039 | __ LoadAddress(kScratchRegister, ExternalReference::isolate_address()); |
| 2040 | __ movq(Operand(rsp, (argument_slots_on_stack - 1) * kPointerSize), |
| 2041 | kScratchRegister); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2042 | |
| 2043 | // Argument 7: Indicate that this is a direct call from JavaScript. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2044 | __ movq(Operand(rsp, (argument_slots_on_stack - 2) * kPointerSize), |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2045 | Immediate(1)); |
| 2046 | |
| 2047 | // Argument 6: Start (high end) of backtracking stack memory area. |
| 2048 | __ movq(kScratchRegister, address_of_regexp_stack_memory_address); |
| 2049 | __ movq(r9, Operand(kScratchRegister, 0)); |
| 2050 | __ movq(kScratchRegister, address_of_regexp_stack_memory_size); |
| 2051 | __ addq(r9, Operand(kScratchRegister, 0)); |
| 2052 | // Argument 6 passed in r9 on Linux and on the stack on Windows. |
| 2053 | #ifdef _WIN64 |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2054 | __ movq(Operand(rsp, (argument_slots_on_stack - 3) * kPointerSize), r9); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2055 | #endif |
| 2056 | |
| 2057 | // Argument 5: static offsets vector buffer. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2058 | __ LoadAddress(r8, |
| 2059 | ExternalReference::address_of_static_offsets_vector(isolate)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2060 | // Argument 5 passed in r8 on Linux and on the stack on Windows. |
| 2061 | #ifdef _WIN64 |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2062 | __ movq(Operand(rsp, (argument_slots_on_stack - 4) * kPointerSize), r8); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2063 | #endif |
| 2064 | |
| 2065 | // First four arguments are passed in registers on both Linux and Windows. |
| 2066 | #ifdef _WIN64 |
| 2067 | Register arg4 = r9; |
| 2068 | Register arg3 = r8; |
| 2069 | Register arg2 = rdx; |
| 2070 | Register arg1 = rcx; |
| 2071 | #else |
| 2072 | Register arg4 = rcx; |
| 2073 | Register arg3 = rdx; |
| 2074 | Register arg2 = rsi; |
| 2075 | Register arg1 = rdi; |
| 2076 | #endif |
| 2077 | |
| 2078 | // Keep track on aliasing between argX defined above and the registers used. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2079 | // rdi: subject string |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2080 | // rbx: previous index |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2081 | // rcx: encoding of subject string (1 if ascii 0 if two_byte); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2082 | // r11: code |
| 2083 | |
| 2084 | // Argument 4: End of string data |
| 2085 | // Argument 3: Start of string data |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2086 | NearLabel setup_two_byte, setup_rest; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2087 | __ testb(rcx, rcx); // Last use of rcx as encoding of subject string. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2088 | __ j(zero, &setup_two_byte); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2089 | __ SmiToInteger32(rcx, FieldOperand(rdi, String::kLengthOffset)); |
| 2090 | __ lea(arg4, FieldOperand(rdi, rcx, times_1, SeqAsciiString::kHeaderSize)); |
| 2091 | __ lea(arg3, FieldOperand(rdi, rbx, times_1, SeqAsciiString::kHeaderSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2092 | __ jmp(&setup_rest); |
| 2093 | __ bind(&setup_two_byte); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2094 | __ SmiToInteger32(rcx, FieldOperand(rdi, String::kLengthOffset)); |
| 2095 | __ lea(arg4, FieldOperand(rdi, rcx, times_2, SeqTwoByteString::kHeaderSize)); |
| 2096 | __ lea(arg3, FieldOperand(rdi, rbx, times_2, SeqTwoByteString::kHeaderSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2097 | |
| 2098 | __ bind(&setup_rest); |
| 2099 | // Argument 2: Previous index. |
| 2100 | __ movq(arg2, rbx); |
| 2101 | |
| 2102 | // Argument 1: Subject string. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2103 | #ifdef _WIN64 |
| 2104 | __ movq(arg1, rdi); |
| 2105 | #else |
| 2106 | // Already there in AMD64 calling convention. |
| 2107 | ASSERT(arg1.is(rdi)); |
| 2108 | #endif |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2109 | |
| 2110 | // Locate the code entry and call it. |
| 2111 | __ addq(r11, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2112 | __ call(r11); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2113 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2114 | __ LeaveApiExitFrame(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2115 | |
| 2116 | // Check the result. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2117 | NearLabel success; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2118 | Label exception; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2119 | __ cmpl(rax, Immediate(NativeRegExpMacroAssembler::SUCCESS)); |
| 2120 | __ j(equal, &success); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2121 | __ cmpl(rax, Immediate(NativeRegExpMacroAssembler::EXCEPTION)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2122 | __ j(equal, &exception); |
| 2123 | __ cmpl(rax, Immediate(NativeRegExpMacroAssembler::FAILURE)); |
| 2124 | // If none of the above, it can only be retry. |
| 2125 | // Handle that in the runtime system. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2126 | __ j(not_equal, &runtime); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2127 | |
| 2128 | // For failure return null. |
| 2129 | __ LoadRoot(rax, Heap::kNullValueRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2130 | __ ret(4 * kPointerSize); |
| 2131 | |
| 2132 | // Load RegExp data. |
| 2133 | __ bind(&success); |
| 2134 | __ movq(rax, Operand(rsp, kJSRegExpOffset)); |
| 2135 | __ movq(rcx, FieldOperand(rax, JSRegExp::kDataOffset)); |
| 2136 | __ SmiToInteger32(rax, |
| 2137 | FieldOperand(rcx, JSRegExp::kIrregexpCaptureCountOffset)); |
| 2138 | // Calculate number of capture registers (number_of_captures + 1) * 2. |
| 2139 | __ leal(rdx, Operand(rax, rax, times_1, 2)); |
| 2140 | |
| 2141 | // rdx: Number of capture registers |
| 2142 | // Load last_match_info which is still known to be a fast case JSArray. |
| 2143 | __ movq(rax, Operand(rsp, kLastMatchInfoOffset)); |
| 2144 | __ movq(rbx, FieldOperand(rax, JSArray::kElementsOffset)); |
| 2145 | |
| 2146 | // rbx: last_match_info backing store (FixedArray) |
| 2147 | // rdx: number of capture registers |
| 2148 | // Store the capture count. |
| 2149 | __ Integer32ToSmi(kScratchRegister, rdx); |
| 2150 | __ movq(FieldOperand(rbx, RegExpImpl::kLastCaptureCountOffset), |
| 2151 | kScratchRegister); |
| 2152 | // Store last subject and last input. |
| 2153 | __ movq(rax, Operand(rsp, kSubjectOffset)); |
| 2154 | __ movq(FieldOperand(rbx, RegExpImpl::kLastSubjectOffset), rax); |
| 2155 | __ movq(rcx, rbx); |
| 2156 | __ RecordWrite(rcx, RegExpImpl::kLastSubjectOffset, rax, rdi); |
| 2157 | __ movq(rax, Operand(rsp, kSubjectOffset)); |
| 2158 | __ movq(FieldOperand(rbx, RegExpImpl::kLastInputOffset), rax); |
| 2159 | __ movq(rcx, rbx); |
| 2160 | __ RecordWrite(rcx, RegExpImpl::kLastInputOffset, rax, rdi); |
| 2161 | |
| 2162 | // Get the static offsets vector filled by the native regexp code. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2163 | __ LoadAddress(rcx, |
| 2164 | ExternalReference::address_of_static_offsets_vector(isolate)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2165 | |
| 2166 | // rbx: last_match_info backing store (FixedArray) |
| 2167 | // rcx: offsets vector |
| 2168 | // rdx: number of capture registers |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2169 | NearLabel next_capture, done; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2170 | // Capture register counter starts from number of capture registers and |
| 2171 | // counts down until wraping after zero. |
| 2172 | __ bind(&next_capture); |
| 2173 | __ subq(rdx, Immediate(1)); |
| 2174 | __ j(negative, &done); |
| 2175 | // Read the value from the static offsets vector buffer and make it a smi. |
| 2176 | __ movl(rdi, Operand(rcx, rdx, times_int_size, 0)); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2177 | __ Integer32ToSmi(rdi, rdi); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2178 | // Store the smi value in the last match info. |
| 2179 | __ movq(FieldOperand(rbx, |
| 2180 | rdx, |
| 2181 | times_pointer_size, |
| 2182 | RegExpImpl::kFirstCaptureOffset), |
| 2183 | rdi); |
| 2184 | __ jmp(&next_capture); |
| 2185 | __ bind(&done); |
| 2186 | |
| 2187 | // Return last match info. |
| 2188 | __ movq(rax, Operand(rsp, kLastMatchInfoOffset)); |
| 2189 | __ ret(4 * kPointerSize); |
| 2190 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2191 | __ bind(&exception); |
| 2192 | // Result must now be exception. If there is no pending exception already a |
| 2193 | // stack overflow (on the backtrack stack) was detected in RegExp code but |
| 2194 | // haven't created the exception yet. Handle that in the runtime system. |
| 2195 | // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2196 | ExternalReference pending_exception_address( |
| 2197 | Isolate::k_pending_exception_address, isolate); |
| 2198 | Operand pending_exception_operand = |
| 2199 | masm->ExternalOperand(pending_exception_address, rbx); |
| 2200 | __ movq(rax, pending_exception_operand); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2201 | __ LoadRoot(rdx, Heap::kTheHoleValueRootIndex); |
| 2202 | __ cmpq(rax, rdx); |
| 2203 | __ j(equal, &runtime); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2204 | __ movq(pending_exception_operand, rdx); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2205 | |
| 2206 | __ CompareRoot(rax, Heap::kTerminationExceptionRootIndex); |
| 2207 | NearLabel termination_exception; |
| 2208 | __ j(equal, &termination_exception); |
| 2209 | __ Throw(rax); |
| 2210 | |
| 2211 | __ bind(&termination_exception); |
| 2212 | __ ThrowUncatchable(TERMINATION, rax); |
| 2213 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2214 | // Do the runtime call to execute the regexp. |
| 2215 | __ bind(&runtime); |
| 2216 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 2217 | #endif // V8_INTERPRETED_REGEXP |
| 2218 | } |
| 2219 | |
| 2220 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2221 | void RegExpConstructResultStub::Generate(MacroAssembler* masm) { |
| 2222 | const int kMaxInlineLength = 100; |
| 2223 | Label slowcase; |
| 2224 | Label done; |
| 2225 | __ movq(r8, Operand(rsp, kPointerSize * 3)); |
| 2226 | __ JumpIfNotSmi(r8, &slowcase); |
| 2227 | __ SmiToInteger32(rbx, r8); |
| 2228 | __ cmpl(rbx, Immediate(kMaxInlineLength)); |
| 2229 | __ j(above, &slowcase); |
| 2230 | // Smi-tagging is equivalent to multiplying by 2. |
| 2231 | STATIC_ASSERT(kSmiTag == 0); |
| 2232 | STATIC_ASSERT(kSmiTagSize == 1); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2233 | // Allocate RegExpResult followed by FixedArray with size in rbx. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2234 | // JSArray: [Map][empty properties][Elements][Length-smi][index][input] |
| 2235 | // Elements: [Map][Length][..elements..] |
| 2236 | __ AllocateInNewSpace(JSRegExpResult::kSize + FixedArray::kHeaderSize, |
| 2237 | times_pointer_size, |
| 2238 | rbx, // In: Number of elements. |
| 2239 | rax, // Out: Start of allocation (tagged). |
| 2240 | rcx, // Out: End of allocation. |
| 2241 | rdx, // Scratch register |
| 2242 | &slowcase, |
| 2243 | TAG_OBJECT); |
| 2244 | // rax: Start of allocated area, object-tagged. |
| 2245 | // rbx: Number of array elements as int32. |
| 2246 | // r8: Number of array elements as smi. |
| 2247 | |
| 2248 | // Set JSArray map to global.regexp_result_map(). |
| 2249 | __ movq(rdx, ContextOperand(rsi, Context::GLOBAL_INDEX)); |
| 2250 | __ movq(rdx, FieldOperand(rdx, GlobalObject::kGlobalContextOffset)); |
| 2251 | __ movq(rdx, ContextOperand(rdx, Context::REGEXP_RESULT_MAP_INDEX)); |
| 2252 | __ movq(FieldOperand(rax, HeapObject::kMapOffset), rdx); |
| 2253 | |
| 2254 | // Set empty properties FixedArray. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2255 | __ LoadRoot(kScratchRegister, Heap::kEmptyFixedArrayRootIndex); |
| 2256 | __ movq(FieldOperand(rax, JSObject::kPropertiesOffset), kScratchRegister); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2257 | |
| 2258 | // Set elements to point to FixedArray allocated right after the JSArray. |
| 2259 | __ lea(rcx, Operand(rax, JSRegExpResult::kSize)); |
| 2260 | __ movq(FieldOperand(rax, JSObject::kElementsOffset), rcx); |
| 2261 | |
| 2262 | // Set input, index and length fields from arguments. |
| 2263 | __ movq(r8, Operand(rsp, kPointerSize * 1)); |
| 2264 | __ movq(FieldOperand(rax, JSRegExpResult::kInputOffset), r8); |
| 2265 | __ movq(r8, Operand(rsp, kPointerSize * 2)); |
| 2266 | __ movq(FieldOperand(rax, JSRegExpResult::kIndexOffset), r8); |
| 2267 | __ movq(r8, Operand(rsp, kPointerSize * 3)); |
| 2268 | __ movq(FieldOperand(rax, JSArray::kLengthOffset), r8); |
| 2269 | |
| 2270 | // Fill out the elements FixedArray. |
| 2271 | // rax: JSArray. |
| 2272 | // rcx: FixedArray. |
| 2273 | // rbx: Number of elements in array as int32. |
| 2274 | |
| 2275 | // Set map. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2276 | __ LoadRoot(kScratchRegister, Heap::kFixedArrayMapRootIndex); |
| 2277 | __ movq(FieldOperand(rcx, HeapObject::kMapOffset), kScratchRegister); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2278 | // Set length. |
| 2279 | __ Integer32ToSmi(rdx, rbx); |
| 2280 | __ movq(FieldOperand(rcx, FixedArray::kLengthOffset), rdx); |
| 2281 | // Fill contents of fixed-array with the-hole. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2282 | __ LoadRoot(rdx, Heap::kTheHoleValueRootIndex); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2283 | __ lea(rcx, FieldOperand(rcx, FixedArray::kHeaderSize)); |
| 2284 | // Fill fixed array elements with hole. |
| 2285 | // rax: JSArray. |
| 2286 | // rbx: Number of elements in array that remains to be filled, as int32. |
| 2287 | // rcx: Start of elements in FixedArray. |
| 2288 | // rdx: the hole. |
| 2289 | Label loop; |
| 2290 | __ testl(rbx, rbx); |
| 2291 | __ bind(&loop); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2292 | __ j(less_equal, &done); // Jump if rcx is negative or zero. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2293 | __ subl(rbx, Immediate(1)); |
| 2294 | __ movq(Operand(rcx, rbx, times_pointer_size, 0), rdx); |
| 2295 | __ jmp(&loop); |
| 2296 | |
| 2297 | __ bind(&done); |
| 2298 | __ ret(3 * kPointerSize); |
| 2299 | |
| 2300 | __ bind(&slowcase); |
| 2301 | __ TailCallRuntime(Runtime::kRegExpConstructResult, 3, 1); |
| 2302 | } |
| 2303 | |
| 2304 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2305 | void NumberToStringStub::GenerateLookupNumberStringCache(MacroAssembler* masm, |
| 2306 | Register object, |
| 2307 | Register result, |
| 2308 | Register scratch1, |
| 2309 | Register scratch2, |
| 2310 | bool object_is_smi, |
| 2311 | Label* not_found) { |
| 2312 | // Use of registers. Register result is used as a temporary. |
| 2313 | Register number_string_cache = result; |
| 2314 | Register mask = scratch1; |
| 2315 | Register scratch = scratch2; |
| 2316 | |
| 2317 | // Load the number string cache. |
| 2318 | __ LoadRoot(number_string_cache, Heap::kNumberStringCacheRootIndex); |
| 2319 | |
| 2320 | // Make the hash mask from the length of the number string cache. It |
| 2321 | // contains two elements (number and string) for each cache entry. |
| 2322 | __ SmiToInteger32( |
| 2323 | mask, FieldOperand(number_string_cache, FixedArray::kLengthOffset)); |
| 2324 | __ shrl(mask, Immediate(1)); |
| 2325 | __ subq(mask, Immediate(1)); // Make mask. |
| 2326 | |
| 2327 | // Calculate the entry in the number string cache. The hash value in the |
| 2328 | // number string cache for smis is just the smi value, and the hash for |
| 2329 | // doubles is the xor of the upper and lower words. See |
| 2330 | // Heap::GetNumberStringCache. |
| 2331 | Label is_smi; |
| 2332 | Label load_result_from_cache; |
| 2333 | if (!object_is_smi) { |
| 2334 | __ JumpIfSmi(object, &is_smi); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 2335 | __ CheckMap(object, FACTORY->heap_number_map(), not_found, true); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2336 | |
| 2337 | STATIC_ASSERT(8 == kDoubleSize); |
| 2338 | __ movl(scratch, FieldOperand(object, HeapNumber::kValueOffset + 4)); |
| 2339 | __ xor_(scratch, FieldOperand(object, HeapNumber::kValueOffset)); |
| 2340 | GenerateConvertHashCodeToIndex(masm, scratch, mask); |
| 2341 | |
| 2342 | Register index = scratch; |
| 2343 | Register probe = mask; |
| 2344 | __ movq(probe, |
| 2345 | FieldOperand(number_string_cache, |
| 2346 | index, |
| 2347 | times_1, |
| 2348 | FixedArray::kHeaderSize)); |
| 2349 | __ JumpIfSmi(probe, not_found); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2350 | __ movsd(xmm0, FieldOperand(object, HeapNumber::kValueOffset)); |
| 2351 | __ movsd(xmm1, FieldOperand(probe, HeapNumber::kValueOffset)); |
| 2352 | __ ucomisd(xmm0, xmm1); |
| 2353 | __ j(parity_even, not_found); // Bail out if NaN is involved. |
| 2354 | __ j(not_equal, not_found); // The cache did not contain this value. |
| 2355 | __ jmp(&load_result_from_cache); |
| 2356 | } |
| 2357 | |
| 2358 | __ bind(&is_smi); |
| 2359 | __ SmiToInteger32(scratch, object); |
| 2360 | GenerateConvertHashCodeToIndex(masm, scratch, mask); |
| 2361 | |
| 2362 | Register index = scratch; |
| 2363 | // Check if the entry is the smi we are looking for. |
| 2364 | __ cmpq(object, |
| 2365 | FieldOperand(number_string_cache, |
| 2366 | index, |
| 2367 | times_1, |
| 2368 | FixedArray::kHeaderSize)); |
| 2369 | __ j(not_equal, not_found); |
| 2370 | |
| 2371 | // Get the result from the cache. |
| 2372 | __ bind(&load_result_from_cache); |
| 2373 | __ movq(result, |
| 2374 | FieldOperand(number_string_cache, |
| 2375 | index, |
| 2376 | times_1, |
| 2377 | FixedArray::kHeaderSize + kPointerSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2378 | Counters* counters = masm->isolate()->counters(); |
| 2379 | __ IncrementCounter(counters->number_to_string_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2380 | } |
| 2381 | |
| 2382 | |
| 2383 | void NumberToStringStub::GenerateConvertHashCodeToIndex(MacroAssembler* masm, |
| 2384 | Register hash, |
| 2385 | Register mask) { |
| 2386 | __ and_(hash, mask); |
| 2387 | // Each entry in string cache consists of two pointer sized fields, |
| 2388 | // but times_twice_pointer_size (multiplication by 16) scale factor |
| 2389 | // is not supported by addrmode on x64 platform. |
| 2390 | // So we have to premultiply entry index before lookup. |
| 2391 | __ shl(hash, Immediate(kPointerSizeLog2 + 1)); |
| 2392 | } |
| 2393 | |
| 2394 | |
| 2395 | void NumberToStringStub::Generate(MacroAssembler* masm) { |
| 2396 | Label runtime; |
| 2397 | |
| 2398 | __ movq(rbx, Operand(rsp, kPointerSize)); |
| 2399 | |
| 2400 | // Generate code to lookup number in the number string cache. |
| 2401 | GenerateLookupNumberStringCache(masm, rbx, rax, r8, r9, false, &runtime); |
| 2402 | __ ret(1 * kPointerSize); |
| 2403 | |
| 2404 | __ bind(&runtime); |
| 2405 | // Handle number to string in the runtime system if not found in the cache. |
| 2406 | __ TailCallRuntime(Runtime::kNumberToStringSkipCache, 1, 1); |
| 2407 | } |
| 2408 | |
| 2409 | |
| 2410 | static int NegativeComparisonResult(Condition cc) { |
| 2411 | ASSERT(cc != equal); |
| 2412 | ASSERT((cc == less) || (cc == less_equal) |
| 2413 | || (cc == greater) || (cc == greater_equal)); |
| 2414 | return (cc == greater || cc == greater_equal) ? LESS : GREATER; |
| 2415 | } |
| 2416 | |
| 2417 | |
| 2418 | void CompareStub::Generate(MacroAssembler* masm) { |
| 2419 | ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| 2420 | |
| 2421 | Label check_unequal_objects, done; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2422 | |
| 2423 | // Compare two smis if required. |
| 2424 | if (include_smi_compare_) { |
| 2425 | Label non_smi, smi_done; |
| 2426 | __ JumpIfNotBothSmi(rax, rdx, &non_smi); |
| 2427 | __ subq(rdx, rax); |
| 2428 | __ j(no_overflow, &smi_done); |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 2429 | __ not_(rdx); // Correct sign in case of overflow. rdx cannot be 0 here. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2430 | __ bind(&smi_done); |
| 2431 | __ movq(rax, rdx); |
| 2432 | __ ret(0); |
| 2433 | __ bind(&non_smi); |
| 2434 | } else if (FLAG_debug_code) { |
| 2435 | Label ok; |
| 2436 | __ JumpIfNotSmi(rdx, &ok); |
| 2437 | __ JumpIfNotSmi(rax, &ok); |
| 2438 | __ Abort("CompareStub: smi operands"); |
| 2439 | __ bind(&ok); |
| 2440 | } |
| 2441 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2442 | // The compare stub returns a positive, negative, or zero 64-bit integer |
| 2443 | // value in rax, corresponding to result of comparing the two inputs. |
| 2444 | // NOTICE! This code is only reached after a smi-fast-case check, so |
| 2445 | // it is certain that at least one operand isn't a smi. |
| 2446 | |
| 2447 | // Two identical objects are equal unless they are both NaN or undefined. |
| 2448 | { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2449 | NearLabel not_identical; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2450 | __ cmpq(rax, rdx); |
| 2451 | __ j(not_equal, ¬_identical); |
| 2452 | |
| 2453 | if (cc_ != equal) { |
| 2454 | // Check for undefined. undefined OP undefined is false even though |
| 2455 | // undefined == undefined. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2456 | NearLabel check_for_nan; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2457 | __ CompareRoot(rdx, Heap::kUndefinedValueRootIndex); |
| 2458 | __ j(not_equal, &check_for_nan); |
| 2459 | __ Set(rax, NegativeComparisonResult(cc_)); |
| 2460 | __ ret(0); |
| 2461 | __ bind(&check_for_nan); |
| 2462 | } |
| 2463 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2464 | // Test for NaN. Sadly, we can't just compare to FACTORY->nan_value(), |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2465 | // so we do the second best thing - test it ourselves. |
| 2466 | // Note: if cc_ != equal, never_nan_nan_ is not used. |
| 2467 | // We cannot set rax to EQUAL until just before return because |
| 2468 | // rax must be unchanged on jump to not_identical. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 2469 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2470 | if (never_nan_nan_ && (cc_ == equal)) { |
| 2471 | __ Set(rax, EQUAL); |
| 2472 | __ ret(0); |
| 2473 | } else { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2474 | NearLabel heap_number; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2475 | // If it's not a heap number, then return equal for (in)equality operator. |
| 2476 | __ Cmp(FieldOperand(rdx, HeapObject::kMapOffset), |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 2477 | FACTORY->heap_number_map()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2478 | __ j(equal, &heap_number); |
| 2479 | if (cc_ != equal) { |
| 2480 | // Call runtime on identical JSObjects. Otherwise return equal. |
| 2481 | __ CmpObjectType(rax, FIRST_JS_OBJECT_TYPE, rcx); |
| 2482 | __ j(above_equal, ¬_identical); |
| 2483 | } |
| 2484 | __ Set(rax, EQUAL); |
| 2485 | __ ret(0); |
| 2486 | |
| 2487 | __ bind(&heap_number); |
| 2488 | // It is a heap number, so return equal if it's not NaN. |
| 2489 | // For NaN, return 1 for every condition except greater and |
| 2490 | // greater-equal. Return -1 for them, so the comparison yields |
| 2491 | // false for all conditions except not-equal. |
| 2492 | __ Set(rax, EQUAL); |
| 2493 | __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset)); |
| 2494 | __ ucomisd(xmm0, xmm0); |
| 2495 | __ setcc(parity_even, rax); |
| 2496 | // rax is 0 for equal non-NaN heapnumbers, 1 for NaNs. |
| 2497 | if (cc_ == greater_equal || cc_ == greater) { |
| 2498 | __ neg(rax); |
| 2499 | } |
| 2500 | __ ret(0); |
| 2501 | } |
| 2502 | |
| 2503 | __ bind(¬_identical); |
| 2504 | } |
| 2505 | |
| 2506 | if (cc_ == equal) { // Both strict and non-strict. |
| 2507 | Label slow; // Fallthrough label. |
| 2508 | |
| 2509 | // If we're doing a strict equality comparison, we don't have to do |
| 2510 | // type conversion, so we generate code to do fast comparison for objects |
| 2511 | // and oddballs. Non-smi numbers and strings still go through the usual |
| 2512 | // slow-case code. |
| 2513 | if (strict_) { |
| 2514 | // If either is a Smi (we know that not both are), then they can only |
| 2515 | // be equal if the other is a HeapNumber. If so, use the slow case. |
| 2516 | { |
| 2517 | Label not_smis; |
| 2518 | __ SelectNonSmi(rbx, rax, rdx, ¬_smis); |
| 2519 | |
| 2520 | // Check if the non-smi operand is a heap number. |
| 2521 | __ Cmp(FieldOperand(rbx, HeapObject::kMapOffset), |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 2522 | FACTORY->heap_number_map()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2523 | // If heap number, handle it in the slow case. |
| 2524 | __ j(equal, &slow); |
| 2525 | // Return non-equal. ebx (the lower half of rbx) is not zero. |
| 2526 | __ movq(rax, rbx); |
| 2527 | __ ret(0); |
| 2528 | |
| 2529 | __ bind(¬_smis); |
| 2530 | } |
| 2531 | |
| 2532 | // If either operand is a JSObject or an oddball value, then they are not |
| 2533 | // equal since their pointers are different |
| 2534 | // There is no test for undetectability in strict equality. |
| 2535 | |
| 2536 | // If the first object is a JS object, we have done pointer comparison. |
| 2537 | STATIC_ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2538 | NearLabel first_non_object; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2539 | __ CmpObjectType(rax, FIRST_JS_OBJECT_TYPE, rcx); |
| 2540 | __ j(below, &first_non_object); |
| 2541 | // Return non-zero (eax (not rax) is not zero) |
| 2542 | Label return_not_equal; |
| 2543 | STATIC_ASSERT(kHeapObjectTag != 0); |
| 2544 | __ bind(&return_not_equal); |
| 2545 | __ ret(0); |
| 2546 | |
| 2547 | __ bind(&first_non_object); |
| 2548 | // Check for oddballs: true, false, null, undefined. |
| 2549 | __ CmpInstanceType(rcx, ODDBALL_TYPE); |
| 2550 | __ j(equal, &return_not_equal); |
| 2551 | |
| 2552 | __ CmpObjectType(rdx, FIRST_JS_OBJECT_TYPE, rcx); |
| 2553 | __ j(above_equal, &return_not_equal); |
| 2554 | |
| 2555 | // Check for oddballs: true, false, null, undefined. |
| 2556 | __ CmpInstanceType(rcx, ODDBALL_TYPE); |
| 2557 | __ j(equal, &return_not_equal); |
| 2558 | |
| 2559 | // Fall through to the general case. |
| 2560 | } |
| 2561 | __ bind(&slow); |
| 2562 | } |
| 2563 | |
| 2564 | // Generate the number comparison code. |
| 2565 | if (include_number_compare_) { |
| 2566 | Label non_number_comparison; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2567 | NearLabel unordered; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2568 | FloatingPointHelper::LoadSSE2UnknownOperands(masm, &non_number_comparison); |
| 2569 | __ xorl(rax, rax); |
| 2570 | __ xorl(rcx, rcx); |
| 2571 | __ ucomisd(xmm0, xmm1); |
| 2572 | |
| 2573 | // Don't base result on EFLAGS when a NaN is involved. |
| 2574 | __ j(parity_even, &unordered); |
| 2575 | // Return a result of -1, 0, or 1, based on EFLAGS. |
| 2576 | __ setcc(above, rax); |
| 2577 | __ setcc(below, rcx); |
| 2578 | __ subq(rax, rcx); |
| 2579 | __ ret(0); |
| 2580 | |
| 2581 | // If one of the numbers was NaN, then the result is always false. |
| 2582 | // The cc is never not-equal. |
| 2583 | __ bind(&unordered); |
| 2584 | ASSERT(cc_ != not_equal); |
| 2585 | if (cc_ == less || cc_ == less_equal) { |
| 2586 | __ Set(rax, 1); |
| 2587 | } else { |
| 2588 | __ Set(rax, -1); |
| 2589 | } |
| 2590 | __ ret(0); |
| 2591 | |
| 2592 | // The number comparison code did not provide a valid result. |
| 2593 | __ bind(&non_number_comparison); |
| 2594 | } |
| 2595 | |
| 2596 | // Fast negative check for symbol-to-symbol equality. |
| 2597 | Label check_for_strings; |
| 2598 | if (cc_ == equal) { |
| 2599 | BranchIfNonSymbol(masm, &check_for_strings, rax, kScratchRegister); |
| 2600 | BranchIfNonSymbol(masm, &check_for_strings, rdx, kScratchRegister); |
| 2601 | |
| 2602 | // We've already checked for object identity, so if both operands |
| 2603 | // are symbols they aren't equal. Register eax (not rax) already holds a |
| 2604 | // non-zero value, which indicates not equal, so just return. |
| 2605 | __ ret(0); |
| 2606 | } |
| 2607 | |
| 2608 | __ bind(&check_for_strings); |
| 2609 | |
| 2610 | __ JumpIfNotBothSequentialAsciiStrings( |
| 2611 | rdx, rax, rcx, rbx, &check_unequal_objects); |
| 2612 | |
| 2613 | // Inline comparison of ascii strings. |
| 2614 | StringCompareStub::GenerateCompareFlatAsciiStrings(masm, |
| 2615 | rdx, |
| 2616 | rax, |
| 2617 | rcx, |
| 2618 | rbx, |
| 2619 | rdi, |
| 2620 | r8); |
| 2621 | |
| 2622 | #ifdef DEBUG |
| 2623 | __ Abort("Unexpected fall-through from string comparison"); |
| 2624 | #endif |
| 2625 | |
| 2626 | __ bind(&check_unequal_objects); |
| 2627 | if (cc_ == equal && !strict_) { |
| 2628 | // Not strict equality. Objects are unequal if |
| 2629 | // they are both JSObjects and not undetectable, |
| 2630 | // and their pointers are different. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2631 | NearLabel not_both_objects, return_unequal; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2632 | // At most one is a smi, so we can test for smi by adding the two. |
| 2633 | // A smi plus a heap object has the low bit set, a heap object plus |
| 2634 | // a heap object has the low bit clear. |
| 2635 | STATIC_ASSERT(kSmiTag == 0); |
| 2636 | STATIC_ASSERT(kSmiTagMask == 1); |
| 2637 | __ lea(rcx, Operand(rax, rdx, times_1, 0)); |
| 2638 | __ testb(rcx, Immediate(kSmiTagMask)); |
| 2639 | __ j(not_zero, ¬_both_objects); |
| 2640 | __ CmpObjectType(rax, FIRST_JS_OBJECT_TYPE, rbx); |
| 2641 | __ j(below, ¬_both_objects); |
| 2642 | __ CmpObjectType(rdx, FIRST_JS_OBJECT_TYPE, rcx); |
| 2643 | __ j(below, ¬_both_objects); |
| 2644 | __ testb(FieldOperand(rbx, Map::kBitFieldOffset), |
| 2645 | Immediate(1 << Map::kIsUndetectable)); |
| 2646 | __ j(zero, &return_unequal); |
| 2647 | __ testb(FieldOperand(rcx, Map::kBitFieldOffset), |
| 2648 | Immediate(1 << Map::kIsUndetectable)); |
| 2649 | __ j(zero, &return_unequal); |
| 2650 | // The objects are both undetectable, so they both compare as the value |
| 2651 | // undefined, and are equal. |
| 2652 | __ Set(rax, EQUAL); |
| 2653 | __ bind(&return_unequal); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2654 | // Return non-equal by returning the non-zero object pointer in rax, |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2655 | // or return equal if we fell through to here. |
| 2656 | __ ret(0); |
| 2657 | __ bind(¬_both_objects); |
| 2658 | } |
| 2659 | |
| 2660 | // Push arguments below the return address to prepare jump to builtin. |
| 2661 | __ pop(rcx); |
| 2662 | __ push(rdx); |
| 2663 | __ push(rax); |
| 2664 | |
| 2665 | // Figure out which native to call and setup the arguments. |
| 2666 | Builtins::JavaScript builtin; |
| 2667 | if (cc_ == equal) { |
| 2668 | builtin = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS; |
| 2669 | } else { |
| 2670 | builtin = Builtins::COMPARE; |
| 2671 | __ Push(Smi::FromInt(NegativeComparisonResult(cc_))); |
| 2672 | } |
| 2673 | |
| 2674 | // Restore return address on the stack. |
| 2675 | __ push(rcx); |
| 2676 | |
| 2677 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 2678 | // tagged as a small integer. |
| 2679 | __ InvokeBuiltin(builtin, JUMP_FUNCTION); |
| 2680 | } |
| 2681 | |
| 2682 | |
| 2683 | void CompareStub::BranchIfNonSymbol(MacroAssembler* masm, |
| 2684 | Label* label, |
| 2685 | Register object, |
| 2686 | Register scratch) { |
| 2687 | __ JumpIfSmi(object, label); |
| 2688 | __ movq(scratch, FieldOperand(object, HeapObject::kMapOffset)); |
| 2689 | __ movzxbq(scratch, |
| 2690 | FieldOperand(scratch, Map::kInstanceTypeOffset)); |
| 2691 | // Ensure that no non-strings have the symbol bit set. |
| 2692 | STATIC_ASSERT(LAST_TYPE < kNotStringTag + kIsSymbolMask); |
| 2693 | STATIC_ASSERT(kSymbolTag != 0); |
| 2694 | __ testb(scratch, Immediate(kIsSymbolMask)); |
| 2695 | __ j(zero, label); |
| 2696 | } |
| 2697 | |
| 2698 | |
| 2699 | void StackCheckStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 2700 | __ TailCallRuntime(Runtime::kStackGuard, 0, 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2701 | } |
| 2702 | |
| 2703 | |
| 2704 | void CallFunctionStub::Generate(MacroAssembler* masm) { |
| 2705 | Label slow; |
| 2706 | |
| 2707 | // If the receiver might be a value (string, number or boolean) check for this |
| 2708 | // and box it if it is. |
| 2709 | if (ReceiverMightBeValue()) { |
| 2710 | // Get the receiver from the stack. |
| 2711 | // +1 ~ return address |
| 2712 | Label receiver_is_value, receiver_is_js_object; |
| 2713 | __ movq(rax, Operand(rsp, (argc_ + 1) * kPointerSize)); |
| 2714 | |
| 2715 | // Check if receiver is a smi (which is a number value). |
| 2716 | __ JumpIfSmi(rax, &receiver_is_value); |
| 2717 | |
| 2718 | // Check if the receiver is a valid JS object. |
| 2719 | __ CmpObjectType(rax, FIRST_JS_OBJECT_TYPE, rdi); |
| 2720 | __ j(above_equal, &receiver_is_js_object); |
| 2721 | |
| 2722 | // Call the runtime to box the value. |
| 2723 | __ bind(&receiver_is_value); |
| 2724 | __ EnterInternalFrame(); |
| 2725 | __ push(rax); |
| 2726 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 2727 | __ LeaveInternalFrame(); |
| 2728 | __ movq(Operand(rsp, (argc_ + 1) * kPointerSize), rax); |
| 2729 | |
| 2730 | __ bind(&receiver_is_js_object); |
| 2731 | } |
| 2732 | |
| 2733 | // Get the function to call from the stack. |
| 2734 | // +2 ~ receiver, return address |
| 2735 | __ movq(rdi, Operand(rsp, (argc_ + 2) * kPointerSize)); |
| 2736 | |
| 2737 | // Check that the function really is a JavaScript function. |
| 2738 | __ JumpIfSmi(rdi, &slow); |
| 2739 | // Goto slow case if we do not have a function. |
| 2740 | __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx); |
| 2741 | __ j(not_equal, &slow); |
| 2742 | |
| 2743 | // Fast-case: Just invoke the function. |
| 2744 | ParameterCount actual(argc_); |
| 2745 | __ InvokeFunction(rdi, actual, JUMP_FUNCTION); |
| 2746 | |
| 2747 | // Slow-case: Non-function called. |
| 2748 | __ bind(&slow); |
| 2749 | // CALL_NON_FUNCTION expects the non-function callee as receiver (instead |
| 2750 | // of the original receiver from the call site). |
| 2751 | __ movq(Operand(rsp, (argc_ + 1) * kPointerSize), rdi); |
| 2752 | __ Set(rax, argc_); |
| 2753 | __ Set(rbx, 0); |
| 2754 | __ GetBuiltinEntry(rdx, Builtins::CALL_NON_FUNCTION); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2755 | Handle<Code> adaptor = |
| 2756 | Isolate::Current()->builtins()->ArgumentsAdaptorTrampoline(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2757 | __ Jump(adaptor, RelocInfo::CODE_TARGET); |
| 2758 | } |
| 2759 | |
| 2760 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2761 | bool CEntryStub::NeedsImmovableCode() { |
| 2762 | return false; |
| 2763 | } |
| 2764 | |
| 2765 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2766 | void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2767 | // Throw exception in eax. |
| 2768 | __ Throw(rax); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2769 | } |
| 2770 | |
| 2771 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2772 | void CEntryStub::GenerateCore(MacroAssembler* masm, |
| 2773 | Label* throw_normal_exception, |
| 2774 | Label* throw_termination_exception, |
| 2775 | Label* throw_out_of_memory_exception, |
| 2776 | bool do_gc, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2777 | bool always_allocate_scope) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2778 | // rax: result parameter for PerformGC, if any. |
| 2779 | // rbx: pointer to C function (C callee-saved). |
| 2780 | // rbp: frame pointer (restored after C call). |
| 2781 | // rsp: stack pointer (restored after C call). |
| 2782 | // r14: number of arguments including receiver (C callee-saved). |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2783 | // r15: pointer to the first argument (C callee-saved). |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2784 | // This pointer is reused in LeaveExitFrame(), so it is stored in a |
| 2785 | // callee-saved register. |
| 2786 | |
| 2787 | // Simple results returned in rax (both AMD64 and Win64 calling conventions). |
| 2788 | // Complex results must be written to address passed as first argument. |
| 2789 | // AMD64 calling convention: a struct of two pointers in rax+rdx |
| 2790 | |
| 2791 | // Check stack alignment. |
| 2792 | if (FLAG_debug_code) { |
| 2793 | __ CheckStackAlignment(); |
| 2794 | } |
| 2795 | |
| 2796 | if (do_gc) { |
| 2797 | // Pass failure code returned from last attempt as first argument to |
| 2798 | // PerformGC. No need to use PrepareCallCFunction/CallCFunction here as the |
| 2799 | // stack is known to be aligned. This function takes one argument which is |
| 2800 | // passed in register. |
| 2801 | #ifdef _WIN64 |
| 2802 | __ movq(rcx, rax); |
| 2803 | #else // _WIN64 |
| 2804 | __ movq(rdi, rax); |
| 2805 | #endif |
| 2806 | __ movq(kScratchRegister, |
| 2807 | FUNCTION_ADDR(Runtime::PerformGC), |
| 2808 | RelocInfo::RUNTIME_ENTRY); |
| 2809 | __ call(kScratchRegister); |
| 2810 | } |
| 2811 | |
| 2812 | ExternalReference scope_depth = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2813 | ExternalReference::heap_always_allocate_scope_depth(masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2814 | if (always_allocate_scope) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2815 | Operand scope_depth_operand = masm->ExternalOperand(scope_depth); |
| 2816 | __ incl(scope_depth_operand); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2817 | } |
| 2818 | |
| 2819 | // Call C function. |
| 2820 | #ifdef _WIN64 |
| 2821 | // Windows 64-bit ABI passes arguments in rcx, rdx, r8, r9 |
| 2822 | // Store Arguments object on stack, below the 4 WIN64 ABI parameter slots. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2823 | __ movq(StackSpaceOperand(0), r14); // argc. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2824 | __ movq(StackSpaceOperand(1), r15); // argv. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2825 | if (result_size_ < 2) { |
| 2826 | // Pass a pointer to the Arguments object as the first argument. |
| 2827 | // Return result in single register (rax). |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2828 | __ lea(rcx, StackSpaceOperand(0)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2829 | __ LoadAddress(rdx, ExternalReference::isolate_address()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2830 | } else { |
| 2831 | ASSERT_EQ(2, result_size_); |
| 2832 | // Pass a pointer to the result location as the first argument. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2833 | __ lea(rcx, StackSpaceOperand(2)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2834 | // Pass a pointer to the Arguments object as the second argument. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2835 | __ lea(rdx, StackSpaceOperand(0)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2836 | __ LoadAddress(r8, ExternalReference::isolate_address()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2837 | } |
| 2838 | |
| 2839 | #else // _WIN64 |
| 2840 | // GCC passes arguments in rdi, rsi, rdx, rcx, r8, r9. |
| 2841 | __ movq(rdi, r14); // argc. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2842 | __ movq(rsi, r15); // argv. |
| 2843 | __ movq(rdx, ExternalReference::isolate_address()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2844 | #endif |
| 2845 | __ call(rbx); |
| 2846 | // Result is in rax - do not destroy this register! |
| 2847 | |
| 2848 | if (always_allocate_scope) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2849 | Operand scope_depth_operand = masm->ExternalOperand(scope_depth); |
| 2850 | __ decl(scope_depth_operand); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2851 | } |
| 2852 | |
| 2853 | // Check for failure result. |
| 2854 | Label failure_returned; |
| 2855 | STATIC_ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
| 2856 | #ifdef _WIN64 |
| 2857 | // If return value is on the stack, pop it to registers. |
| 2858 | if (result_size_ > 1) { |
| 2859 | ASSERT_EQ(2, result_size_); |
| 2860 | // Read result values stored on stack. Result is stored |
| 2861 | // above the four argument mirror slots and the two |
| 2862 | // Arguments object slots. |
| 2863 | __ movq(rax, Operand(rsp, 6 * kPointerSize)); |
| 2864 | __ movq(rdx, Operand(rsp, 7 * kPointerSize)); |
| 2865 | } |
| 2866 | #endif |
| 2867 | __ lea(rcx, Operand(rax, 1)); |
| 2868 | // Lower 2 bits of rcx are 0 iff rax has failure tag. |
| 2869 | __ testl(rcx, Immediate(kFailureTagMask)); |
| 2870 | __ j(zero, &failure_returned); |
| 2871 | |
| 2872 | // Exit the JavaScript to C++ exit frame. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2873 | __ LeaveExitFrame(save_doubles_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2874 | __ ret(0); |
| 2875 | |
| 2876 | // Handling of failure. |
| 2877 | __ bind(&failure_returned); |
| 2878 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2879 | NearLabel retry; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2880 | // If the returned exception is RETRY_AFTER_GC continue at retry label |
| 2881 | STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0); |
| 2882 | __ testl(rax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
| 2883 | __ j(zero, &retry); |
| 2884 | |
| 2885 | // Special handling of out of memory exceptions. |
| 2886 | __ movq(kScratchRegister, Failure::OutOfMemoryException(), RelocInfo::NONE); |
| 2887 | __ cmpq(rax, kScratchRegister); |
| 2888 | __ j(equal, throw_out_of_memory_exception); |
| 2889 | |
| 2890 | // Retrieve the pending exception and clear the variable. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2891 | ExternalReference pending_exception_address( |
| 2892 | Isolate::k_pending_exception_address, masm->isolate()); |
| 2893 | Operand pending_exception_operand = |
| 2894 | masm->ExternalOperand(pending_exception_address); |
| 2895 | __ movq(rax, pending_exception_operand); |
| 2896 | __ LoadRoot(rdx, Heap::kTheHoleValueRootIndex); |
| 2897 | __ movq(pending_exception_operand, rdx); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2898 | |
| 2899 | // Special handling of termination exceptions which are uncatchable |
| 2900 | // by javascript code. |
| 2901 | __ CompareRoot(rax, Heap::kTerminationExceptionRootIndex); |
| 2902 | __ j(equal, throw_termination_exception); |
| 2903 | |
| 2904 | // Handle normal exception. |
| 2905 | __ jmp(throw_normal_exception); |
| 2906 | |
| 2907 | // Retry. |
| 2908 | __ bind(&retry); |
| 2909 | } |
| 2910 | |
| 2911 | |
| 2912 | void CEntryStub::GenerateThrowUncatchable(MacroAssembler* masm, |
| 2913 | UncatchableExceptionType type) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2914 | __ ThrowUncatchable(type, rax); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2915 | } |
| 2916 | |
| 2917 | |
| 2918 | void CEntryStub::Generate(MacroAssembler* masm) { |
| 2919 | // rax: number of arguments including receiver |
| 2920 | // rbx: pointer to C function (C callee-saved) |
| 2921 | // rbp: frame pointer of calling JS frame (restored after C call) |
| 2922 | // rsp: stack pointer (restored after C call) |
| 2923 | // rsi: current context (restored) |
| 2924 | |
| 2925 | // NOTE: Invocations of builtins may return failure objects |
| 2926 | // instead of a proper result. The builtin entry handles |
| 2927 | // this by performing a garbage collection and retrying the |
| 2928 | // builtin once. |
| 2929 | |
| 2930 | // Enter the exit frame that transitions from JavaScript to C++. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 2931 | #ifdef _WIN64 |
| 2932 | int arg_stack_space = (result_size_ < 2 ? 2 : 4); |
| 2933 | #else |
| 2934 | int arg_stack_space = 0; |
| 2935 | #endif |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2936 | __ EnterExitFrame(arg_stack_space, save_doubles_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2937 | |
| 2938 | // rax: Holds the context at this point, but should not be used. |
| 2939 | // On entry to code generated by GenerateCore, it must hold |
| 2940 | // a failure result if the collect_garbage argument to GenerateCore |
| 2941 | // is true. This failure result can be the result of code |
| 2942 | // generated by a previous call to GenerateCore. The value |
| 2943 | // of rax is then passed to Runtime::PerformGC. |
| 2944 | // rbx: pointer to builtin function (C callee-saved). |
| 2945 | // rbp: frame pointer of exit frame (restored after C call). |
| 2946 | // rsp: stack pointer (restored after C call). |
| 2947 | // r14: number of arguments including receiver (C callee-saved). |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2948 | // r15: argv pointer (C callee-saved). |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2949 | |
| 2950 | Label throw_normal_exception; |
| 2951 | Label throw_termination_exception; |
| 2952 | Label throw_out_of_memory_exception; |
| 2953 | |
| 2954 | // Call into the runtime system. |
| 2955 | GenerateCore(masm, |
| 2956 | &throw_normal_exception, |
| 2957 | &throw_termination_exception, |
| 2958 | &throw_out_of_memory_exception, |
| 2959 | false, |
| 2960 | false); |
| 2961 | |
| 2962 | // Do space-specific GC and retry runtime call. |
| 2963 | GenerateCore(masm, |
| 2964 | &throw_normal_exception, |
| 2965 | &throw_termination_exception, |
| 2966 | &throw_out_of_memory_exception, |
| 2967 | true, |
| 2968 | false); |
| 2969 | |
| 2970 | // Do full GC and retry runtime call one final time. |
| 2971 | Failure* failure = Failure::InternalError(); |
| 2972 | __ movq(rax, failure, RelocInfo::NONE); |
| 2973 | GenerateCore(masm, |
| 2974 | &throw_normal_exception, |
| 2975 | &throw_termination_exception, |
| 2976 | &throw_out_of_memory_exception, |
| 2977 | true, |
| 2978 | true); |
| 2979 | |
| 2980 | __ bind(&throw_out_of_memory_exception); |
| 2981 | GenerateThrowUncatchable(masm, OUT_OF_MEMORY); |
| 2982 | |
| 2983 | __ bind(&throw_termination_exception); |
| 2984 | GenerateThrowUncatchable(masm, TERMINATION); |
| 2985 | |
| 2986 | __ bind(&throw_normal_exception); |
| 2987 | GenerateThrowTOS(masm); |
| 2988 | } |
| 2989 | |
| 2990 | |
| 2991 | void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) { |
| 2992 | Label invoke, exit; |
| 2993 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 2994 | Label not_outermost_js, not_outermost_js_2; |
| 2995 | #endif |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2996 | { // NOLINT. Scope block confuses linter. |
| 2997 | MacroAssembler::NoRootArrayScope uninitialized_root_register(masm); |
| 2998 | // Setup frame. |
| 2999 | __ push(rbp); |
| 3000 | __ movq(rbp, rsp); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3001 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3002 | // Push the stack frame type marker twice. |
| 3003 | int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY; |
| 3004 | // Scratch register is neither callee-save, nor an argument register on any |
| 3005 | // platform. It's free to use at this point. |
| 3006 | // Cannot use smi-register for loading yet. |
| 3007 | __ movq(kScratchRegister, |
| 3008 | reinterpret_cast<uint64_t>(Smi::FromInt(marker)), |
| 3009 | RelocInfo::NONE); |
| 3010 | __ push(kScratchRegister); // context slot |
| 3011 | __ push(kScratchRegister); // function slot |
| 3012 | // Save callee-saved registers (X64/Win64 calling conventions). |
| 3013 | __ push(r12); |
| 3014 | __ push(r13); |
| 3015 | __ push(r14); |
| 3016 | __ push(r15); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3017 | #ifdef _WIN64 |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3018 | __ push(rdi); // Only callee save in Win64 ABI, argument in AMD64 ABI. |
| 3019 | __ push(rsi); // Only callee save in Win64 ABI, argument in AMD64 ABI. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3020 | #endif |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3021 | __ push(rbx); |
| 3022 | // TODO(X64): On Win64, if we ever use XMM6-XMM15, the low low 64 bits are |
| 3023 | // callee save as well. |
| 3024 | |
| 3025 | // Set up the roots and smi constant registers. |
| 3026 | // Needs to be done before any further smi loads. |
| 3027 | __ InitializeSmiConstantRegister(); |
| 3028 | __ InitializeRootRegister(); |
| 3029 | } |
| 3030 | |
| 3031 | Isolate* isolate = masm->isolate(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3032 | |
| 3033 | // Save copies of the top frame descriptor on the stack. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3034 | ExternalReference c_entry_fp(Isolate::k_c_entry_fp_address, isolate); |
| 3035 | { |
| 3036 | Operand c_entry_fp_operand = masm->ExternalOperand(c_entry_fp); |
| 3037 | __ push(c_entry_fp_operand); |
| 3038 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3039 | |
| 3040 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 3041 | // If this is the outermost JS call, set js_entry_sp value. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3042 | ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address, isolate); |
| 3043 | __ Load(rax, js_entry_sp); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3044 | __ testq(rax, rax); |
| 3045 | __ j(not_zero, ¬_outermost_js); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 3046 | __ Push(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3047 | __ movq(rax, rbp); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3048 | __ Store(js_entry_sp, rax); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 3049 | Label cont; |
| 3050 | __ jmp(&cont); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3051 | __ bind(¬_outermost_js); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 3052 | __ Push(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME)); |
| 3053 | __ bind(&cont); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3054 | #endif |
| 3055 | |
| 3056 | // Call a faked try-block that does the invoke. |
| 3057 | __ call(&invoke); |
| 3058 | |
| 3059 | // Caught exception: Store result (exception) in the pending |
| 3060 | // exception field in the JSEnv and return a failure sentinel. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3061 | ExternalReference pending_exception(Isolate::k_pending_exception_address, |
| 3062 | isolate); |
| 3063 | __ Store(pending_exception, rax); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3064 | __ movq(rax, Failure::Exception(), RelocInfo::NONE); |
| 3065 | __ jmp(&exit); |
| 3066 | |
| 3067 | // Invoke: Link this frame into the handler chain. |
| 3068 | __ bind(&invoke); |
| 3069 | __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); |
| 3070 | |
| 3071 | // Clear any pending exceptions. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3072 | __ LoadRoot(rax, Heap::kTheHoleValueRootIndex); |
| 3073 | __ Store(pending_exception, rax); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3074 | |
| 3075 | // Fake a receiver (NULL). |
| 3076 | __ push(Immediate(0)); // receiver |
| 3077 | |
| 3078 | // Invoke the function by calling through JS entry trampoline |
| 3079 | // builtin and pop the faked function when we return. We load the address |
| 3080 | // from an external reference instead of inlining the call target address |
| 3081 | // directly in the code, because the builtin stubs may not have been |
| 3082 | // generated yet at the time this code is generated. |
| 3083 | if (is_construct) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3084 | ExternalReference construct_entry(Builtins::kJSConstructEntryTrampoline, |
| 3085 | isolate); |
| 3086 | __ Load(rax, construct_entry); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3087 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3088 | ExternalReference entry(Builtins::kJSEntryTrampoline, isolate); |
| 3089 | __ Load(rax, entry); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3090 | } |
| 3091 | __ lea(kScratchRegister, FieldOperand(rax, Code::kHeaderSize)); |
| 3092 | __ call(kScratchRegister); |
| 3093 | |
| 3094 | // Unlink this frame from the handler chain. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 3095 | __ PopTryHandler(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3096 | |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 3097 | __ bind(&exit); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3098 | #ifdef ENABLE_LOGGING_AND_PROFILING |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 3099 | // Check if the current stack frame is marked as the outermost JS frame. |
| 3100 | __ pop(rbx); |
| 3101 | __ Cmp(rbx, Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3102 | __ j(not_equal, ¬_outermost_js_2); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 3103 | __ movq(kScratchRegister, js_entry_sp); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3104 | __ movq(Operand(kScratchRegister, 0), Immediate(0)); |
| 3105 | __ bind(¬_outermost_js_2); |
| 3106 | #endif |
| 3107 | |
| 3108 | // Restore the top frame descriptor from the stack. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 3109 | { Operand c_entry_fp_operand = masm->ExternalOperand(c_entry_fp); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3110 | __ pop(c_entry_fp_operand); |
| 3111 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3112 | |
| 3113 | // Restore callee-saved registers (X64 conventions). |
| 3114 | __ pop(rbx); |
| 3115 | #ifdef _WIN64 |
| 3116 | // Callee save on in Win64 ABI, arguments/volatile in AMD64 ABI. |
| 3117 | __ pop(rsi); |
| 3118 | __ pop(rdi); |
| 3119 | #endif |
| 3120 | __ pop(r15); |
| 3121 | __ pop(r14); |
| 3122 | __ pop(r13); |
| 3123 | __ pop(r12); |
| 3124 | __ addq(rsp, Immediate(2 * kPointerSize)); // remove markers |
| 3125 | |
| 3126 | // Restore frame pointer and return. |
| 3127 | __ pop(rbp); |
| 3128 | __ ret(0); |
| 3129 | } |
| 3130 | |
| 3131 | |
| 3132 | void InstanceofStub::Generate(MacroAssembler* masm) { |
| 3133 | // Implements "value instanceof function" operator. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3134 | // Expected input state with no inline cache: |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3135 | // rsp[0] : return address |
| 3136 | // rsp[1] : function pointer |
| 3137 | // rsp[2] : value |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3138 | // Expected input state with an inline one-element cache: |
| 3139 | // rsp[0] : return address |
| 3140 | // rsp[1] : offset from return address to location of inline cache |
| 3141 | // rsp[2] : function pointer |
| 3142 | // rsp[3] : value |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3143 | // Returns a bitwise zero to indicate that the value |
| 3144 | // is and instance of the function and anything else to |
| 3145 | // indicate that the value is not an instance. |
| 3146 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 3147 | static const int kOffsetToMapCheckValue = 2; |
| 3148 | static const int kOffsetToResultValue = 18; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3149 | // The last 4 bytes of the instruction sequence |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 3150 | // movq(rdi, FieldOperand(rax, HeapObject::kMapOffset)) |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3151 | // Move(kScratchRegister, FACTORY->the_hole_value()) |
| 3152 | // in front of the hole value address. |
| 3153 | static const unsigned int kWordBeforeMapCheckValue = 0xBA49FF78; |
| 3154 | // The last 4 bytes of the instruction sequence |
| 3155 | // __ j(not_equal, &cache_miss); |
| 3156 | // __ LoadRoot(ToRegister(instr->result()), Heap::kTheHoleValueRootIndex); |
| 3157 | // before the offset of the hole value in the root array. |
| 3158 | static const unsigned int kWordBeforeResultValue = 0x458B4909; |
| 3159 | // Only the inline check flag is supported on X64. |
| 3160 | ASSERT(flags_ == kNoFlags || HasCallSiteInlineCheck()); |
| 3161 | int extra_stack_space = HasCallSiteInlineCheck() ? kPointerSize : 0; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3162 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3163 | // Get the object - go slow case if it's a smi. |
| 3164 | Label slow; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3165 | |
| 3166 | __ movq(rax, Operand(rsp, 2 * kPointerSize + extra_stack_space)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3167 | __ JumpIfSmi(rax, &slow); |
| 3168 | |
| 3169 | // Check that the left hand is a JS object. Leave its map in rax. |
| 3170 | __ CmpObjectType(rax, FIRST_JS_OBJECT_TYPE, rax); |
| 3171 | __ j(below, &slow); |
| 3172 | __ CmpInstanceType(rax, LAST_JS_OBJECT_TYPE); |
| 3173 | __ j(above, &slow); |
| 3174 | |
| 3175 | // Get the prototype of the function. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3176 | __ movq(rdx, Operand(rsp, 1 * kPointerSize + extra_stack_space)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3177 | // rdx is function, rax is map. |
| 3178 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3179 | // If there is a call site cache don't look in the global cache, but do the |
| 3180 | // real lookup and update the call site cache. |
| 3181 | if (!HasCallSiteInlineCheck()) { |
| 3182 | // Look up the function and the map in the instanceof cache. |
| 3183 | NearLabel miss; |
| 3184 | __ CompareRoot(rdx, Heap::kInstanceofCacheFunctionRootIndex); |
| 3185 | __ j(not_equal, &miss); |
| 3186 | __ CompareRoot(rax, Heap::kInstanceofCacheMapRootIndex); |
| 3187 | __ j(not_equal, &miss); |
| 3188 | __ LoadRoot(rax, Heap::kInstanceofCacheAnswerRootIndex); |
| 3189 | __ ret(2 * kPointerSize); |
| 3190 | __ bind(&miss); |
| 3191 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3192 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3193 | __ TryGetFunctionPrototype(rdx, rbx, &slow); |
| 3194 | |
| 3195 | // Check that the function prototype is a JS object. |
| 3196 | __ JumpIfSmi(rbx, &slow); |
| 3197 | __ CmpObjectType(rbx, FIRST_JS_OBJECT_TYPE, kScratchRegister); |
| 3198 | __ j(below, &slow); |
| 3199 | __ CmpInstanceType(kScratchRegister, LAST_JS_OBJECT_TYPE); |
| 3200 | __ j(above, &slow); |
| 3201 | |
| 3202 | // Register mapping: |
| 3203 | // rax is object map. |
| 3204 | // rdx is function. |
| 3205 | // rbx is function prototype. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3206 | if (!HasCallSiteInlineCheck()) { |
| 3207 | __ StoreRoot(rdx, Heap::kInstanceofCacheFunctionRootIndex); |
| 3208 | __ StoreRoot(rax, Heap::kInstanceofCacheMapRootIndex); |
| 3209 | } else { |
| 3210 | __ movq(kScratchRegister, Operand(rsp, 0 * kPointerSize)); |
| 3211 | __ subq(kScratchRegister, Operand(rsp, 1 * kPointerSize)); |
| 3212 | __ movq(Operand(kScratchRegister, kOffsetToMapCheckValue), rax); |
| 3213 | if (FLAG_debug_code) { |
| 3214 | __ movl(rdi, Immediate(kWordBeforeMapCheckValue)); |
| 3215 | __ cmpl(Operand(kScratchRegister, kOffsetToMapCheckValue - 4), rdi); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 3216 | __ Assert(equal, "InstanceofStub unexpected call site cache (check)."); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3217 | } |
| 3218 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3219 | |
| 3220 | __ movq(rcx, FieldOperand(rax, Map::kPrototypeOffset)); |
| 3221 | |
| 3222 | // Loop through the prototype chain looking for the function prototype. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3223 | NearLabel loop, is_instance, is_not_instance; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3224 | __ LoadRoot(kScratchRegister, Heap::kNullValueRootIndex); |
| 3225 | __ bind(&loop); |
| 3226 | __ cmpq(rcx, rbx); |
| 3227 | __ j(equal, &is_instance); |
| 3228 | __ cmpq(rcx, kScratchRegister); |
| 3229 | // The code at is_not_instance assumes that kScratchRegister contains a |
| 3230 | // non-zero GCable value (the null object in this case). |
| 3231 | __ j(equal, &is_not_instance); |
| 3232 | __ movq(rcx, FieldOperand(rcx, HeapObject::kMapOffset)); |
| 3233 | __ movq(rcx, FieldOperand(rcx, Map::kPrototypeOffset)); |
| 3234 | __ jmp(&loop); |
| 3235 | |
| 3236 | __ bind(&is_instance); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3237 | if (!HasCallSiteInlineCheck()) { |
| 3238 | __ xorl(rax, rax); |
| 3239 | // Store bitwise zero in the cache. This is a Smi in GC terms. |
| 3240 | STATIC_ASSERT(kSmiTag == 0); |
| 3241 | __ StoreRoot(rax, Heap::kInstanceofCacheAnswerRootIndex); |
| 3242 | } else { |
| 3243 | // Store offset of true in the root array at the inline check site. |
| 3244 | ASSERT((Heap::kTrueValueRootIndex << kPointerSizeLog2) - kRootRegisterBias |
| 3245 | == 0xB0 - 0x100); |
| 3246 | __ movl(rax, Immediate(0xB0)); // TrueValue is at -10 * kPointerSize. |
| 3247 | __ movq(kScratchRegister, Operand(rsp, 0 * kPointerSize)); |
| 3248 | __ subq(kScratchRegister, Operand(rsp, 1 * kPointerSize)); |
| 3249 | __ movb(Operand(kScratchRegister, kOffsetToResultValue), rax); |
| 3250 | if (FLAG_debug_code) { |
| 3251 | __ movl(rax, Immediate(kWordBeforeResultValue)); |
| 3252 | __ cmpl(Operand(kScratchRegister, kOffsetToResultValue - 4), rax); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 3253 | __ Assert(equal, "InstanceofStub unexpected call site cache (mov)."); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3254 | } |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 3255 | __ Set(rax, 0); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3256 | } |
| 3257 | __ ret(2 * kPointerSize + extra_stack_space); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3258 | |
| 3259 | __ bind(&is_not_instance); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3260 | if (!HasCallSiteInlineCheck()) { |
| 3261 | // We have to store a non-zero value in the cache. |
| 3262 | __ StoreRoot(kScratchRegister, Heap::kInstanceofCacheAnswerRootIndex); |
| 3263 | } else { |
| 3264 | // Store offset of false in the root array at the inline check site. |
| 3265 | ASSERT((Heap::kFalseValueRootIndex << kPointerSizeLog2) - kRootRegisterBias |
| 3266 | == 0xB8 - 0x100); |
| 3267 | __ movl(rax, Immediate(0xB8)); // FalseValue is at -9 * kPointerSize. |
| 3268 | __ movq(kScratchRegister, Operand(rsp, 0 * kPointerSize)); |
| 3269 | __ subq(kScratchRegister, Operand(rsp, 1 * kPointerSize)); |
| 3270 | __ movb(Operand(kScratchRegister, kOffsetToResultValue), rax); |
| 3271 | if (FLAG_debug_code) { |
| 3272 | __ movl(rax, Immediate(kWordBeforeResultValue)); |
| 3273 | __ cmpl(Operand(kScratchRegister, kOffsetToResultValue - 4), rax); |
| 3274 | __ Assert(equal, "InstanceofStub unexpected call site cache (mov)"); |
| 3275 | } |
| 3276 | } |
| 3277 | __ ret(2 * kPointerSize + extra_stack_space); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3278 | |
| 3279 | // Slow-case: Go through the JavaScript implementation. |
| 3280 | __ bind(&slow); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3281 | if (HasCallSiteInlineCheck()) { |
| 3282 | // Remove extra value from the stack. |
| 3283 | __ pop(rcx); |
| 3284 | __ pop(rax); |
| 3285 | __ push(rcx); |
| 3286 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3287 | __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION); |
| 3288 | } |
| 3289 | |
| 3290 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3291 | // Passing arguments in registers is not supported. |
| 3292 | Register InstanceofStub::left() { return no_reg; } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3293 | |
| 3294 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3295 | Register InstanceofStub::right() { return no_reg; } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3296 | |
| 3297 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3298 | int CompareStub::MinorKey() { |
| 3299 | // Encode the three parameters in a unique 16 bit value. To avoid duplicate |
| 3300 | // stubs the never NaN NaN condition is only taken into account if the |
| 3301 | // condition is equals. |
| 3302 | ASSERT(static_cast<unsigned>(cc_) < (1 << 12)); |
| 3303 | ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| 3304 | return ConditionField::encode(static_cast<unsigned>(cc_)) |
| 3305 | | RegisterField::encode(false) // lhs_ and rhs_ are not used |
| 3306 | | StrictField::encode(strict_) |
| 3307 | | NeverNanNanField::encode(cc_ == equal ? never_nan_nan_ : false) |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3308 | | IncludeNumberCompareField::encode(include_number_compare_) |
| 3309 | | IncludeSmiCompareField::encode(include_smi_compare_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3310 | } |
| 3311 | |
| 3312 | |
| 3313 | // Unfortunately you have to run without snapshots to see most of these |
| 3314 | // names in the profile since most compare stubs end up in the snapshot. |
| 3315 | const char* CompareStub::GetName() { |
| 3316 | ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| 3317 | |
| 3318 | if (name_ != NULL) return name_; |
| 3319 | const int kMaxNameLength = 100; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3320 | name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray( |
| 3321 | kMaxNameLength); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3322 | if (name_ == NULL) return "OOM"; |
| 3323 | |
| 3324 | const char* cc_name; |
| 3325 | switch (cc_) { |
| 3326 | case less: cc_name = "LT"; break; |
| 3327 | case greater: cc_name = "GT"; break; |
| 3328 | case less_equal: cc_name = "LE"; break; |
| 3329 | case greater_equal: cc_name = "GE"; break; |
| 3330 | case equal: cc_name = "EQ"; break; |
| 3331 | case not_equal: cc_name = "NE"; break; |
| 3332 | default: cc_name = "UnknownCondition"; break; |
| 3333 | } |
| 3334 | |
| 3335 | const char* strict_name = ""; |
| 3336 | if (strict_ && (cc_ == equal || cc_ == not_equal)) { |
| 3337 | strict_name = "_STRICT"; |
| 3338 | } |
| 3339 | |
| 3340 | const char* never_nan_nan_name = ""; |
| 3341 | if (never_nan_nan_ && (cc_ == equal || cc_ == not_equal)) { |
| 3342 | never_nan_nan_name = "_NO_NAN"; |
| 3343 | } |
| 3344 | |
| 3345 | const char* include_number_compare_name = ""; |
| 3346 | if (!include_number_compare_) { |
| 3347 | include_number_compare_name = "_NO_NUMBER"; |
| 3348 | } |
| 3349 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3350 | const char* include_smi_compare_name = ""; |
| 3351 | if (!include_smi_compare_) { |
| 3352 | include_smi_compare_name = "_NO_SMI"; |
| 3353 | } |
| 3354 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3355 | OS::SNPrintF(Vector<char>(name_, kMaxNameLength), |
| 3356 | "CompareStub_%s%s%s%s", |
| 3357 | cc_name, |
| 3358 | strict_name, |
| 3359 | never_nan_nan_name, |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3360 | include_number_compare_name, |
| 3361 | include_smi_compare_name); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3362 | return name_; |
| 3363 | } |
| 3364 | |
| 3365 | |
| 3366 | // ------------------------------------------------------------------------- |
| 3367 | // StringCharCodeAtGenerator |
| 3368 | |
| 3369 | void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 3370 | Label flat_string; |
| 3371 | Label ascii_string; |
| 3372 | Label got_char_code; |
| 3373 | |
| 3374 | // If the receiver is a smi trigger the non-string case. |
| 3375 | __ JumpIfSmi(object_, receiver_not_string_); |
| 3376 | |
| 3377 | // Fetch the instance type of the receiver into result register. |
| 3378 | __ movq(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 3379 | __ movzxbl(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| 3380 | // If the receiver is not a string trigger the non-string case. |
| 3381 | __ testb(result_, Immediate(kIsNotStringMask)); |
| 3382 | __ j(not_zero, receiver_not_string_); |
| 3383 | |
| 3384 | // If the index is non-smi trigger the non-smi case. |
| 3385 | __ JumpIfNotSmi(index_, &index_not_smi_); |
| 3386 | |
| 3387 | // Put smi-tagged index into scratch register. |
| 3388 | __ movq(scratch_, index_); |
| 3389 | __ bind(&got_smi_index_); |
| 3390 | |
| 3391 | // Check for index out of range. |
| 3392 | __ SmiCompare(scratch_, FieldOperand(object_, String::kLengthOffset)); |
| 3393 | __ j(above_equal, index_out_of_range_); |
| 3394 | |
| 3395 | // We need special handling for non-flat strings. |
| 3396 | STATIC_ASSERT(kSeqStringTag == 0); |
| 3397 | __ testb(result_, Immediate(kStringRepresentationMask)); |
| 3398 | __ j(zero, &flat_string); |
| 3399 | |
| 3400 | // Handle non-flat strings. |
| 3401 | __ testb(result_, Immediate(kIsConsStringMask)); |
| 3402 | __ j(zero, &call_runtime_); |
| 3403 | |
| 3404 | // ConsString. |
| 3405 | // Check whether the right hand side is the empty string (i.e. if |
| 3406 | // this is really a flat string in a cons string). If that is not |
| 3407 | // the case we would rather go to the runtime system now to flatten |
| 3408 | // the string. |
| 3409 | __ CompareRoot(FieldOperand(object_, ConsString::kSecondOffset), |
| 3410 | Heap::kEmptyStringRootIndex); |
| 3411 | __ j(not_equal, &call_runtime_); |
| 3412 | // Get the first of the two strings and load its instance type. |
| 3413 | __ movq(object_, FieldOperand(object_, ConsString::kFirstOffset)); |
| 3414 | __ movq(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 3415 | __ movzxbl(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| 3416 | // If the first cons component is also non-flat, then go to runtime. |
| 3417 | STATIC_ASSERT(kSeqStringTag == 0); |
| 3418 | __ testb(result_, Immediate(kStringRepresentationMask)); |
| 3419 | __ j(not_zero, &call_runtime_); |
| 3420 | |
| 3421 | // Check for 1-byte or 2-byte string. |
| 3422 | __ bind(&flat_string); |
| 3423 | STATIC_ASSERT(kAsciiStringTag != 0); |
| 3424 | __ testb(result_, Immediate(kStringEncodingMask)); |
| 3425 | __ j(not_zero, &ascii_string); |
| 3426 | |
| 3427 | // 2-byte string. |
| 3428 | // Load the 2-byte character code into the result register. |
| 3429 | __ SmiToInteger32(scratch_, scratch_); |
| 3430 | __ movzxwl(result_, FieldOperand(object_, |
| 3431 | scratch_, times_2, |
| 3432 | SeqTwoByteString::kHeaderSize)); |
| 3433 | __ jmp(&got_char_code); |
| 3434 | |
| 3435 | // ASCII string. |
| 3436 | // Load the byte into the result register. |
| 3437 | __ bind(&ascii_string); |
| 3438 | __ SmiToInteger32(scratch_, scratch_); |
| 3439 | __ movzxbl(result_, FieldOperand(object_, |
| 3440 | scratch_, times_1, |
| 3441 | SeqAsciiString::kHeaderSize)); |
| 3442 | __ bind(&got_char_code); |
| 3443 | __ Integer32ToSmi(result_, result_); |
| 3444 | __ bind(&exit_); |
| 3445 | } |
| 3446 | |
| 3447 | |
| 3448 | void StringCharCodeAtGenerator::GenerateSlow( |
| 3449 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 3450 | __ Abort("Unexpected fallthrough to CharCodeAt slow case"); |
| 3451 | |
| 3452 | // Index is not a smi. |
| 3453 | __ bind(&index_not_smi_); |
| 3454 | // If index is a heap number, try converting it to an integer. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame^] | 3455 | __ CheckMap(index_, FACTORY->heap_number_map(), index_not_number_, true); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3456 | call_helper.BeforeCall(masm); |
| 3457 | __ push(object_); |
| 3458 | __ push(index_); |
| 3459 | __ push(index_); // Consumed by runtime conversion function. |
| 3460 | if (index_flags_ == STRING_INDEX_IS_NUMBER) { |
| 3461 | __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero, 1); |
| 3462 | } else { |
| 3463 | ASSERT(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); |
| 3464 | // NumberToSmi discards numbers that are not exact integers. |
| 3465 | __ CallRuntime(Runtime::kNumberToSmi, 1); |
| 3466 | } |
| 3467 | if (!scratch_.is(rax)) { |
| 3468 | // Save the conversion result before the pop instructions below |
| 3469 | // have a chance to overwrite it. |
| 3470 | __ movq(scratch_, rax); |
| 3471 | } |
| 3472 | __ pop(index_); |
| 3473 | __ pop(object_); |
| 3474 | // Reload the instance type. |
| 3475 | __ movq(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 3476 | __ movzxbl(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| 3477 | call_helper.AfterCall(masm); |
| 3478 | // If index is still not a smi, it must be out of range. |
| 3479 | __ JumpIfNotSmi(scratch_, index_out_of_range_); |
| 3480 | // Otherwise, return to the fast path. |
| 3481 | __ jmp(&got_smi_index_); |
| 3482 | |
| 3483 | // Call runtime. We get here when the receiver is a string and the |
| 3484 | // index is a number, but the code of getting the actual character |
| 3485 | // is too complex (e.g., when the string needs to be flattened). |
| 3486 | __ bind(&call_runtime_); |
| 3487 | call_helper.BeforeCall(masm); |
| 3488 | __ push(object_); |
| 3489 | __ push(index_); |
| 3490 | __ CallRuntime(Runtime::kStringCharCodeAt, 2); |
| 3491 | if (!result_.is(rax)) { |
| 3492 | __ movq(result_, rax); |
| 3493 | } |
| 3494 | call_helper.AfterCall(masm); |
| 3495 | __ jmp(&exit_); |
| 3496 | |
| 3497 | __ Abort("Unexpected fallthrough from CharCodeAt slow case"); |
| 3498 | } |
| 3499 | |
| 3500 | |
| 3501 | // ------------------------------------------------------------------------- |
| 3502 | // StringCharFromCodeGenerator |
| 3503 | |
| 3504 | void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
| 3505 | // Fast case of Heap::LookupSingleCharacterStringFromCode. |
| 3506 | __ JumpIfNotSmi(code_, &slow_case_); |
| 3507 | __ SmiCompare(code_, Smi::FromInt(String::kMaxAsciiCharCode)); |
| 3508 | __ j(above, &slow_case_); |
| 3509 | |
| 3510 | __ LoadRoot(result_, Heap::kSingleCharacterStringCacheRootIndex); |
| 3511 | SmiIndex index = masm->SmiToIndex(kScratchRegister, code_, kPointerSizeLog2); |
| 3512 | __ movq(result_, FieldOperand(result_, index.reg, index.scale, |
| 3513 | FixedArray::kHeaderSize)); |
| 3514 | __ CompareRoot(result_, Heap::kUndefinedValueRootIndex); |
| 3515 | __ j(equal, &slow_case_); |
| 3516 | __ bind(&exit_); |
| 3517 | } |
| 3518 | |
| 3519 | |
| 3520 | void StringCharFromCodeGenerator::GenerateSlow( |
| 3521 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 3522 | __ Abort("Unexpected fallthrough to CharFromCode slow case"); |
| 3523 | |
| 3524 | __ bind(&slow_case_); |
| 3525 | call_helper.BeforeCall(masm); |
| 3526 | __ push(code_); |
| 3527 | __ CallRuntime(Runtime::kCharFromCode, 1); |
| 3528 | if (!result_.is(rax)) { |
| 3529 | __ movq(result_, rax); |
| 3530 | } |
| 3531 | call_helper.AfterCall(masm); |
| 3532 | __ jmp(&exit_); |
| 3533 | |
| 3534 | __ Abort("Unexpected fallthrough from CharFromCode slow case"); |
| 3535 | } |
| 3536 | |
| 3537 | |
| 3538 | // ------------------------------------------------------------------------- |
| 3539 | // StringCharAtGenerator |
| 3540 | |
| 3541 | void StringCharAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 3542 | char_code_at_generator_.GenerateFast(masm); |
| 3543 | char_from_code_generator_.GenerateFast(masm); |
| 3544 | } |
| 3545 | |
| 3546 | |
| 3547 | void StringCharAtGenerator::GenerateSlow( |
| 3548 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 3549 | char_code_at_generator_.GenerateSlow(masm, call_helper); |
| 3550 | char_from_code_generator_.GenerateSlow(masm, call_helper); |
| 3551 | } |
| 3552 | |
| 3553 | |
| 3554 | void StringAddStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3555 | Label string_add_runtime, call_builtin; |
| 3556 | Builtins::JavaScript builtin_id = Builtins::ADD; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3557 | |
| 3558 | // Load the two arguments. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3559 | __ movq(rax, Operand(rsp, 2 * kPointerSize)); // First argument (left). |
| 3560 | __ movq(rdx, Operand(rsp, 1 * kPointerSize)); // Second argument (right). |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3561 | |
| 3562 | // Make sure that both arguments are strings if not known in advance. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3563 | if (flags_ == NO_STRING_ADD_FLAGS) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3564 | Condition is_smi; |
| 3565 | is_smi = masm->CheckSmi(rax); |
| 3566 | __ j(is_smi, &string_add_runtime); |
| 3567 | __ CmpObjectType(rax, FIRST_NONSTRING_TYPE, r8); |
| 3568 | __ j(above_equal, &string_add_runtime); |
| 3569 | |
| 3570 | // First argument is a a string, test second. |
| 3571 | is_smi = masm->CheckSmi(rdx); |
| 3572 | __ j(is_smi, &string_add_runtime); |
| 3573 | __ CmpObjectType(rdx, FIRST_NONSTRING_TYPE, r9); |
| 3574 | __ j(above_equal, &string_add_runtime); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3575 | } else { |
| 3576 | // Here at least one of the arguments is definitely a string. |
| 3577 | // We convert the one that is not known to be a string. |
| 3578 | if ((flags_ & NO_STRING_CHECK_LEFT_IN_STUB) == 0) { |
| 3579 | ASSERT((flags_ & NO_STRING_CHECK_RIGHT_IN_STUB) != 0); |
| 3580 | GenerateConvertArgument(masm, 2 * kPointerSize, rax, rbx, rcx, rdi, |
| 3581 | &call_builtin); |
| 3582 | builtin_id = Builtins::STRING_ADD_RIGHT; |
| 3583 | } else if ((flags_ & NO_STRING_CHECK_RIGHT_IN_STUB) == 0) { |
| 3584 | ASSERT((flags_ & NO_STRING_CHECK_LEFT_IN_STUB) != 0); |
| 3585 | GenerateConvertArgument(masm, 1 * kPointerSize, rdx, rbx, rcx, rdi, |
| 3586 | &call_builtin); |
| 3587 | builtin_id = Builtins::STRING_ADD_LEFT; |
| 3588 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3589 | } |
| 3590 | |
| 3591 | // Both arguments are strings. |
| 3592 | // rax: first string |
| 3593 | // rdx: second string |
| 3594 | // Check if either of the strings are empty. In that case return the other. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3595 | NearLabel second_not_zero_length, both_not_zero_length; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3596 | __ movq(rcx, FieldOperand(rdx, String::kLengthOffset)); |
| 3597 | __ SmiTest(rcx); |
| 3598 | __ j(not_zero, &second_not_zero_length); |
| 3599 | // Second string is empty, result is first string which is already in rax. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3600 | Counters* counters = masm->isolate()->counters(); |
| 3601 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3602 | __ ret(2 * kPointerSize); |
| 3603 | __ bind(&second_not_zero_length); |
| 3604 | __ movq(rbx, FieldOperand(rax, String::kLengthOffset)); |
| 3605 | __ SmiTest(rbx); |
| 3606 | __ j(not_zero, &both_not_zero_length); |
| 3607 | // First string is empty, result is second string which is in rdx. |
| 3608 | __ movq(rax, rdx); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3609 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3610 | __ ret(2 * kPointerSize); |
| 3611 | |
| 3612 | // Both strings are non-empty. |
| 3613 | // rax: first string |
| 3614 | // rbx: length of first string |
| 3615 | // rcx: length of second string |
| 3616 | // rdx: second string |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3617 | // r8: map of first string (if flags_ == NO_STRING_ADD_FLAGS) |
| 3618 | // r9: map of second string (if flags_ == NO_STRING_ADD_FLAGS) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3619 | Label string_add_flat_result, longer_than_two; |
| 3620 | __ bind(&both_not_zero_length); |
| 3621 | |
| 3622 | // If arguments where known to be strings, maps are not loaded to r8 and r9 |
| 3623 | // by the code above. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3624 | if (flags_ != NO_STRING_ADD_FLAGS) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3625 | __ movq(r8, FieldOperand(rax, HeapObject::kMapOffset)); |
| 3626 | __ movq(r9, FieldOperand(rdx, HeapObject::kMapOffset)); |
| 3627 | } |
| 3628 | // Get the instance types of the two strings as they will be needed soon. |
| 3629 | __ movzxbl(r8, FieldOperand(r8, Map::kInstanceTypeOffset)); |
| 3630 | __ movzxbl(r9, FieldOperand(r9, Map::kInstanceTypeOffset)); |
| 3631 | |
| 3632 | // Look at the length of the result of adding the two strings. |
| 3633 | STATIC_ASSERT(String::kMaxLength <= Smi::kMaxValue / 2); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3634 | __ SmiAdd(rbx, rbx, rcx); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3635 | // Use the symbol table when adding two one character strings, as it |
| 3636 | // helps later optimizations to return a symbol here. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3637 | __ SmiCompare(rbx, Smi::FromInt(2)); |
| 3638 | __ j(not_equal, &longer_than_two); |
| 3639 | |
| 3640 | // Check that both strings are non-external ascii strings. |
| 3641 | __ JumpIfBothInstanceTypesAreNotSequentialAscii(r8, r9, rbx, rcx, |
| 3642 | &string_add_runtime); |
| 3643 | |
| 3644 | // Get the two characters forming the sub string. |
| 3645 | __ movzxbq(rbx, FieldOperand(rax, SeqAsciiString::kHeaderSize)); |
| 3646 | __ movzxbq(rcx, FieldOperand(rdx, SeqAsciiString::kHeaderSize)); |
| 3647 | |
| 3648 | // Try to lookup two character string in symbol table. If it is not found |
| 3649 | // just allocate a new one. |
| 3650 | Label make_two_character_string, make_flat_ascii_string; |
| 3651 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3652 | masm, rbx, rcx, r14, r11, rdi, r15, &make_two_character_string); |
| 3653 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3654 | __ ret(2 * kPointerSize); |
| 3655 | |
| 3656 | __ bind(&make_two_character_string); |
| 3657 | __ Set(rbx, 2); |
| 3658 | __ jmp(&make_flat_ascii_string); |
| 3659 | |
| 3660 | __ bind(&longer_than_two); |
| 3661 | // Check if resulting string will be flat. |
| 3662 | __ SmiCompare(rbx, Smi::FromInt(String::kMinNonFlatLength)); |
| 3663 | __ j(below, &string_add_flat_result); |
| 3664 | // Handle exceptionally long strings in the runtime system. |
| 3665 | STATIC_ASSERT((String::kMaxLength & 0x80000000) == 0); |
| 3666 | __ SmiCompare(rbx, Smi::FromInt(String::kMaxLength)); |
| 3667 | __ j(above, &string_add_runtime); |
| 3668 | |
| 3669 | // If result is not supposed to be flat, allocate a cons string object. If |
| 3670 | // both strings are ascii the result is an ascii cons string. |
| 3671 | // rax: first string |
| 3672 | // rbx: length of resulting flat string |
| 3673 | // rdx: second string |
| 3674 | // r8: instance type of first string |
| 3675 | // r9: instance type of second string |
| 3676 | Label non_ascii, allocated, ascii_data; |
| 3677 | __ movl(rcx, r8); |
| 3678 | __ and_(rcx, r9); |
| 3679 | STATIC_ASSERT(kStringEncodingMask == kAsciiStringTag); |
| 3680 | __ testl(rcx, Immediate(kAsciiStringTag)); |
| 3681 | __ j(zero, &non_ascii); |
| 3682 | __ bind(&ascii_data); |
| 3683 | // Allocate an acsii cons string. |
| 3684 | __ AllocateAsciiConsString(rcx, rdi, no_reg, &string_add_runtime); |
| 3685 | __ bind(&allocated); |
| 3686 | // Fill the fields of the cons string. |
| 3687 | __ movq(FieldOperand(rcx, ConsString::kLengthOffset), rbx); |
| 3688 | __ movq(FieldOperand(rcx, ConsString::kHashFieldOffset), |
| 3689 | Immediate(String::kEmptyHashField)); |
| 3690 | __ movq(FieldOperand(rcx, ConsString::kFirstOffset), rax); |
| 3691 | __ movq(FieldOperand(rcx, ConsString::kSecondOffset), rdx); |
| 3692 | __ movq(rax, rcx); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3693 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3694 | __ ret(2 * kPointerSize); |
| 3695 | __ bind(&non_ascii); |
| 3696 | // At least one of the strings is two-byte. Check whether it happens |
| 3697 | // to contain only ascii characters. |
| 3698 | // rcx: first instance type AND second instance type. |
| 3699 | // r8: first instance type. |
| 3700 | // r9: second instance type. |
| 3701 | __ testb(rcx, Immediate(kAsciiDataHintMask)); |
| 3702 | __ j(not_zero, &ascii_data); |
| 3703 | __ xor_(r8, r9); |
| 3704 | STATIC_ASSERT(kAsciiStringTag != 0 && kAsciiDataHintTag != 0); |
| 3705 | __ andb(r8, Immediate(kAsciiStringTag | kAsciiDataHintTag)); |
| 3706 | __ cmpb(r8, Immediate(kAsciiStringTag | kAsciiDataHintTag)); |
| 3707 | __ j(equal, &ascii_data); |
| 3708 | // Allocate a two byte cons string. |
| 3709 | __ AllocateConsString(rcx, rdi, no_reg, &string_add_runtime); |
| 3710 | __ jmp(&allocated); |
| 3711 | |
| 3712 | // Handle creating a flat result. First check that both strings are not |
| 3713 | // external strings. |
| 3714 | // rax: first string |
| 3715 | // rbx: length of resulting flat string as smi |
| 3716 | // rdx: second string |
| 3717 | // r8: instance type of first string |
| 3718 | // r9: instance type of first string |
| 3719 | __ bind(&string_add_flat_result); |
| 3720 | __ SmiToInteger32(rbx, rbx); |
| 3721 | __ movl(rcx, r8); |
| 3722 | __ and_(rcx, Immediate(kStringRepresentationMask)); |
| 3723 | __ cmpl(rcx, Immediate(kExternalStringTag)); |
| 3724 | __ j(equal, &string_add_runtime); |
| 3725 | __ movl(rcx, r9); |
| 3726 | __ and_(rcx, Immediate(kStringRepresentationMask)); |
| 3727 | __ cmpl(rcx, Immediate(kExternalStringTag)); |
| 3728 | __ j(equal, &string_add_runtime); |
| 3729 | // Now check if both strings are ascii strings. |
| 3730 | // rax: first string |
| 3731 | // rbx: length of resulting flat string |
| 3732 | // rdx: second string |
| 3733 | // r8: instance type of first string |
| 3734 | // r9: instance type of second string |
| 3735 | Label non_ascii_string_add_flat_result; |
| 3736 | STATIC_ASSERT(kStringEncodingMask == kAsciiStringTag); |
| 3737 | __ testl(r8, Immediate(kAsciiStringTag)); |
| 3738 | __ j(zero, &non_ascii_string_add_flat_result); |
| 3739 | __ testl(r9, Immediate(kAsciiStringTag)); |
| 3740 | __ j(zero, &string_add_runtime); |
| 3741 | |
| 3742 | __ bind(&make_flat_ascii_string); |
| 3743 | // Both strings are ascii strings. As they are short they are both flat. |
| 3744 | __ AllocateAsciiString(rcx, rbx, rdi, r14, r11, &string_add_runtime); |
| 3745 | // rcx: result string |
| 3746 | __ movq(rbx, rcx); |
| 3747 | // Locate first character of result. |
| 3748 | __ addq(rcx, Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 3749 | // Locate first character of first argument |
| 3750 | __ SmiToInteger32(rdi, FieldOperand(rax, String::kLengthOffset)); |
| 3751 | __ addq(rax, Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 3752 | // rax: first char of first argument |
| 3753 | // rbx: result string |
| 3754 | // rcx: first character of result |
| 3755 | // rdx: second string |
| 3756 | // rdi: length of first argument |
| 3757 | StringHelper::GenerateCopyCharacters(masm, rcx, rax, rdi, true); |
| 3758 | // Locate first character of second argument. |
| 3759 | __ SmiToInteger32(rdi, FieldOperand(rdx, String::kLengthOffset)); |
| 3760 | __ addq(rdx, Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 3761 | // rbx: result string |
| 3762 | // rcx: next character of result |
| 3763 | // rdx: first char of second argument |
| 3764 | // rdi: length of second argument |
| 3765 | StringHelper::GenerateCopyCharacters(masm, rcx, rdx, rdi, true); |
| 3766 | __ movq(rax, rbx); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3767 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3768 | __ ret(2 * kPointerSize); |
| 3769 | |
| 3770 | // Handle creating a flat two byte result. |
| 3771 | // rax: first string - known to be two byte |
| 3772 | // rbx: length of resulting flat string |
| 3773 | // rdx: second string |
| 3774 | // r8: instance type of first string |
| 3775 | // r9: instance type of first string |
| 3776 | __ bind(&non_ascii_string_add_flat_result); |
| 3777 | __ and_(r9, Immediate(kAsciiStringTag)); |
| 3778 | __ j(not_zero, &string_add_runtime); |
| 3779 | // Both strings are two byte strings. As they are short they are both |
| 3780 | // flat. |
| 3781 | __ AllocateTwoByteString(rcx, rbx, rdi, r14, r11, &string_add_runtime); |
| 3782 | // rcx: result string |
| 3783 | __ movq(rbx, rcx); |
| 3784 | // Locate first character of result. |
| 3785 | __ addq(rcx, Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 3786 | // Locate first character of first argument. |
| 3787 | __ SmiToInteger32(rdi, FieldOperand(rax, String::kLengthOffset)); |
| 3788 | __ addq(rax, Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 3789 | // rax: first char of first argument |
| 3790 | // rbx: result string |
| 3791 | // rcx: first character of result |
| 3792 | // rdx: second argument |
| 3793 | // rdi: length of first argument |
| 3794 | StringHelper::GenerateCopyCharacters(masm, rcx, rax, rdi, false); |
| 3795 | // Locate first character of second argument. |
| 3796 | __ SmiToInteger32(rdi, FieldOperand(rdx, String::kLengthOffset)); |
| 3797 | __ addq(rdx, Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 3798 | // rbx: result string |
| 3799 | // rcx: next character of result |
| 3800 | // rdx: first char of second argument |
| 3801 | // rdi: length of second argument |
| 3802 | StringHelper::GenerateCopyCharacters(masm, rcx, rdx, rdi, false); |
| 3803 | __ movq(rax, rbx); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3804 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3805 | __ ret(2 * kPointerSize); |
| 3806 | |
| 3807 | // Just jump to runtime to add the two strings. |
| 3808 | __ bind(&string_add_runtime); |
| 3809 | __ TailCallRuntime(Runtime::kStringAdd, 2, 1); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3810 | |
| 3811 | if (call_builtin.is_linked()) { |
| 3812 | __ bind(&call_builtin); |
| 3813 | __ InvokeBuiltin(builtin_id, JUMP_FUNCTION); |
| 3814 | } |
| 3815 | } |
| 3816 | |
| 3817 | |
| 3818 | void StringAddStub::GenerateConvertArgument(MacroAssembler* masm, |
| 3819 | int stack_offset, |
| 3820 | Register arg, |
| 3821 | Register scratch1, |
| 3822 | Register scratch2, |
| 3823 | Register scratch3, |
| 3824 | Label* slow) { |
| 3825 | // First check if the argument is already a string. |
| 3826 | Label not_string, done; |
| 3827 | __ JumpIfSmi(arg, ¬_string); |
| 3828 | __ CmpObjectType(arg, FIRST_NONSTRING_TYPE, scratch1); |
| 3829 | __ j(below, &done); |
| 3830 | |
| 3831 | // Check the number to string cache. |
| 3832 | Label not_cached; |
| 3833 | __ bind(¬_string); |
| 3834 | // Puts the cached result into scratch1. |
| 3835 | NumberToStringStub::GenerateLookupNumberStringCache(masm, |
| 3836 | arg, |
| 3837 | scratch1, |
| 3838 | scratch2, |
| 3839 | scratch3, |
| 3840 | false, |
| 3841 | ¬_cached); |
| 3842 | __ movq(arg, scratch1); |
| 3843 | __ movq(Operand(rsp, stack_offset), arg); |
| 3844 | __ jmp(&done); |
| 3845 | |
| 3846 | // Check if the argument is a safe string wrapper. |
| 3847 | __ bind(¬_cached); |
| 3848 | __ JumpIfSmi(arg, slow); |
| 3849 | __ CmpObjectType(arg, JS_VALUE_TYPE, scratch1); // map -> scratch1. |
| 3850 | __ j(not_equal, slow); |
| 3851 | __ testb(FieldOperand(scratch1, Map::kBitField2Offset), |
| 3852 | Immediate(1 << Map::kStringWrapperSafeForDefaultValueOf)); |
| 3853 | __ j(zero, slow); |
| 3854 | __ movq(arg, FieldOperand(arg, JSValue::kValueOffset)); |
| 3855 | __ movq(Operand(rsp, stack_offset), arg); |
| 3856 | |
| 3857 | __ bind(&done); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3858 | } |
| 3859 | |
| 3860 | |
| 3861 | void StringHelper::GenerateCopyCharacters(MacroAssembler* masm, |
| 3862 | Register dest, |
| 3863 | Register src, |
| 3864 | Register count, |
| 3865 | bool ascii) { |
| 3866 | Label loop; |
| 3867 | __ bind(&loop); |
| 3868 | // This loop just copies one character at a time, as it is only used for very |
| 3869 | // short strings. |
| 3870 | if (ascii) { |
| 3871 | __ movb(kScratchRegister, Operand(src, 0)); |
| 3872 | __ movb(Operand(dest, 0), kScratchRegister); |
| 3873 | __ incq(src); |
| 3874 | __ incq(dest); |
| 3875 | } else { |
| 3876 | __ movzxwl(kScratchRegister, Operand(src, 0)); |
| 3877 | __ movw(Operand(dest, 0), kScratchRegister); |
| 3878 | __ addq(src, Immediate(2)); |
| 3879 | __ addq(dest, Immediate(2)); |
| 3880 | } |
| 3881 | __ decl(count); |
| 3882 | __ j(not_zero, &loop); |
| 3883 | } |
| 3884 | |
| 3885 | |
| 3886 | void StringHelper::GenerateCopyCharactersREP(MacroAssembler* masm, |
| 3887 | Register dest, |
| 3888 | Register src, |
| 3889 | Register count, |
| 3890 | bool ascii) { |
| 3891 | // Copy characters using rep movs of doublewords. Align destination on 4 byte |
| 3892 | // boundary before starting rep movs. Copy remaining characters after running |
| 3893 | // rep movs. |
| 3894 | // Count is positive int32, dest and src are character pointers. |
| 3895 | ASSERT(dest.is(rdi)); // rep movs destination |
| 3896 | ASSERT(src.is(rsi)); // rep movs source |
| 3897 | ASSERT(count.is(rcx)); // rep movs count |
| 3898 | |
| 3899 | // Nothing to do for zero characters. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3900 | NearLabel done; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3901 | __ testl(count, count); |
| 3902 | __ j(zero, &done); |
| 3903 | |
| 3904 | // Make count the number of bytes to copy. |
| 3905 | if (!ascii) { |
| 3906 | STATIC_ASSERT(2 == sizeof(uc16)); |
| 3907 | __ addl(count, count); |
| 3908 | } |
| 3909 | |
| 3910 | // Don't enter the rep movs if there are less than 4 bytes to copy. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3911 | NearLabel last_bytes; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3912 | __ testl(count, Immediate(~7)); |
| 3913 | __ j(zero, &last_bytes); |
| 3914 | |
| 3915 | // Copy from edi to esi using rep movs instruction. |
| 3916 | __ movl(kScratchRegister, count); |
| 3917 | __ shr(count, Immediate(3)); // Number of doublewords to copy. |
| 3918 | __ repmovsq(); |
| 3919 | |
| 3920 | // Find number of bytes left. |
| 3921 | __ movl(count, kScratchRegister); |
| 3922 | __ and_(count, Immediate(7)); |
| 3923 | |
| 3924 | // Check if there are more bytes to copy. |
| 3925 | __ bind(&last_bytes); |
| 3926 | __ testl(count, count); |
| 3927 | __ j(zero, &done); |
| 3928 | |
| 3929 | // Copy remaining characters. |
| 3930 | Label loop; |
| 3931 | __ bind(&loop); |
| 3932 | __ movb(kScratchRegister, Operand(src, 0)); |
| 3933 | __ movb(Operand(dest, 0), kScratchRegister); |
| 3934 | __ incq(src); |
| 3935 | __ incq(dest); |
| 3936 | __ decl(count); |
| 3937 | __ j(not_zero, &loop); |
| 3938 | |
| 3939 | __ bind(&done); |
| 3940 | } |
| 3941 | |
| 3942 | void StringHelper::GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm, |
| 3943 | Register c1, |
| 3944 | Register c2, |
| 3945 | Register scratch1, |
| 3946 | Register scratch2, |
| 3947 | Register scratch3, |
| 3948 | Register scratch4, |
| 3949 | Label* not_found) { |
| 3950 | // Register scratch3 is the general scratch register in this function. |
| 3951 | Register scratch = scratch3; |
| 3952 | |
| 3953 | // Make sure that both characters are not digits as such strings has a |
| 3954 | // different hash algorithm. Don't try to look for these in the symbol table. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3955 | NearLabel not_array_index; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3956 | __ leal(scratch, Operand(c1, -'0')); |
| 3957 | __ cmpl(scratch, Immediate(static_cast<int>('9' - '0'))); |
| 3958 | __ j(above, ¬_array_index); |
| 3959 | __ leal(scratch, Operand(c2, -'0')); |
| 3960 | __ cmpl(scratch, Immediate(static_cast<int>('9' - '0'))); |
| 3961 | __ j(below_equal, not_found); |
| 3962 | |
| 3963 | __ bind(¬_array_index); |
| 3964 | // Calculate the two character string hash. |
| 3965 | Register hash = scratch1; |
| 3966 | GenerateHashInit(masm, hash, c1, scratch); |
| 3967 | GenerateHashAddCharacter(masm, hash, c2, scratch); |
| 3968 | GenerateHashGetHash(masm, hash, scratch); |
| 3969 | |
| 3970 | // Collect the two characters in a register. |
| 3971 | Register chars = c1; |
| 3972 | __ shl(c2, Immediate(kBitsPerByte)); |
| 3973 | __ orl(chars, c2); |
| 3974 | |
| 3975 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 3976 | // hash: hash of two character string. |
| 3977 | |
| 3978 | // Load the symbol table. |
| 3979 | Register symbol_table = c2; |
| 3980 | __ LoadRoot(symbol_table, Heap::kSymbolTableRootIndex); |
| 3981 | |
| 3982 | // Calculate capacity mask from the symbol table capacity. |
| 3983 | Register mask = scratch2; |
| 3984 | __ SmiToInteger32(mask, |
| 3985 | FieldOperand(symbol_table, SymbolTable::kCapacityOffset)); |
| 3986 | __ decl(mask); |
| 3987 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3988 | Register map = scratch4; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3989 | |
| 3990 | // Registers |
| 3991 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 3992 | // hash: hash of two character string (32-bit int) |
| 3993 | // symbol_table: symbol table |
| 3994 | // mask: capacity mask (32-bit int) |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3995 | // map: - |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3996 | // scratch: - |
| 3997 | |
| 3998 | // Perform a number of probes in the symbol table. |
| 3999 | static const int kProbes = 4; |
| 4000 | Label found_in_symbol_table; |
| 4001 | Label next_probe[kProbes]; |
| 4002 | for (int i = 0; i < kProbes; i++) { |
| 4003 | // Calculate entry in symbol table. |
| 4004 | __ movl(scratch, hash); |
| 4005 | if (i > 0) { |
| 4006 | __ addl(scratch, Immediate(SymbolTable::GetProbeOffset(i))); |
| 4007 | } |
| 4008 | __ andl(scratch, mask); |
| 4009 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4010 | // Load the entry from the symbol table. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4011 | Register candidate = scratch; // Scratch register contains candidate. |
| 4012 | STATIC_ASSERT(SymbolTable::kEntrySize == 1); |
| 4013 | __ movq(candidate, |
| 4014 | FieldOperand(symbol_table, |
| 4015 | scratch, |
| 4016 | times_pointer_size, |
| 4017 | SymbolTable::kElementsStartOffset)); |
| 4018 | |
| 4019 | // If entry is undefined no string with this hash can be found. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4020 | NearLabel is_string; |
| 4021 | __ CmpObjectType(candidate, ODDBALL_TYPE, map); |
| 4022 | __ j(not_equal, &is_string); |
| 4023 | |
| 4024 | __ CompareRoot(candidate, Heap::kUndefinedValueRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4025 | __ j(equal, not_found); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4026 | // Must be null (deleted entry). |
| 4027 | __ jmp(&next_probe[i]); |
| 4028 | |
| 4029 | __ bind(&is_string); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4030 | |
| 4031 | // If length is not 2 the string is not a candidate. |
| 4032 | __ SmiCompare(FieldOperand(candidate, String::kLengthOffset), |
| 4033 | Smi::FromInt(2)); |
| 4034 | __ j(not_equal, &next_probe[i]); |
| 4035 | |
| 4036 | // We use kScratchRegister as a temporary register in assumption that |
| 4037 | // JumpIfInstanceTypeIsNotSequentialAscii does not use it implicitly |
| 4038 | Register temp = kScratchRegister; |
| 4039 | |
| 4040 | // Check that the candidate is a non-external ascii string. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4041 | __ movzxbl(temp, FieldOperand(map, Map::kInstanceTypeOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4042 | __ JumpIfInstanceTypeIsNotSequentialAscii( |
| 4043 | temp, temp, &next_probe[i]); |
| 4044 | |
| 4045 | // Check if the two characters match. |
| 4046 | __ movl(temp, FieldOperand(candidate, SeqAsciiString::kHeaderSize)); |
| 4047 | __ andl(temp, Immediate(0x0000ffff)); |
| 4048 | __ cmpl(chars, temp); |
| 4049 | __ j(equal, &found_in_symbol_table); |
| 4050 | __ bind(&next_probe[i]); |
| 4051 | } |
| 4052 | |
| 4053 | // No matching 2 character string found by probing. |
| 4054 | __ jmp(not_found); |
| 4055 | |
| 4056 | // Scratch register contains result when we fall through to here. |
| 4057 | Register result = scratch; |
| 4058 | __ bind(&found_in_symbol_table); |
| 4059 | if (!result.is(rax)) { |
| 4060 | __ movq(rax, result); |
| 4061 | } |
| 4062 | } |
| 4063 | |
| 4064 | |
| 4065 | void StringHelper::GenerateHashInit(MacroAssembler* masm, |
| 4066 | Register hash, |
| 4067 | Register character, |
| 4068 | Register scratch) { |
| 4069 | // hash = character + (character << 10); |
| 4070 | __ movl(hash, character); |
| 4071 | __ shll(hash, Immediate(10)); |
| 4072 | __ addl(hash, character); |
| 4073 | // hash ^= hash >> 6; |
| 4074 | __ movl(scratch, hash); |
| 4075 | __ sarl(scratch, Immediate(6)); |
| 4076 | __ xorl(hash, scratch); |
| 4077 | } |
| 4078 | |
| 4079 | |
| 4080 | void StringHelper::GenerateHashAddCharacter(MacroAssembler* masm, |
| 4081 | Register hash, |
| 4082 | Register character, |
| 4083 | Register scratch) { |
| 4084 | // hash += character; |
| 4085 | __ addl(hash, character); |
| 4086 | // hash += hash << 10; |
| 4087 | __ movl(scratch, hash); |
| 4088 | __ shll(scratch, Immediate(10)); |
| 4089 | __ addl(hash, scratch); |
| 4090 | // hash ^= hash >> 6; |
| 4091 | __ movl(scratch, hash); |
| 4092 | __ sarl(scratch, Immediate(6)); |
| 4093 | __ xorl(hash, scratch); |
| 4094 | } |
| 4095 | |
| 4096 | |
| 4097 | void StringHelper::GenerateHashGetHash(MacroAssembler* masm, |
| 4098 | Register hash, |
| 4099 | Register scratch) { |
| 4100 | // hash += hash << 3; |
| 4101 | __ leal(hash, Operand(hash, hash, times_8, 0)); |
| 4102 | // hash ^= hash >> 11; |
| 4103 | __ movl(scratch, hash); |
| 4104 | __ sarl(scratch, Immediate(11)); |
| 4105 | __ xorl(hash, scratch); |
| 4106 | // hash += hash << 15; |
| 4107 | __ movl(scratch, hash); |
| 4108 | __ shll(scratch, Immediate(15)); |
| 4109 | __ addl(hash, scratch); |
| 4110 | |
| 4111 | // if (hash == 0) hash = 27; |
| 4112 | Label hash_not_zero; |
| 4113 | __ j(not_zero, &hash_not_zero); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 4114 | __ Set(hash, 27); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4115 | __ bind(&hash_not_zero); |
| 4116 | } |
| 4117 | |
| 4118 | void SubStringStub::Generate(MacroAssembler* masm) { |
| 4119 | Label runtime; |
| 4120 | |
| 4121 | // Stack frame on entry. |
| 4122 | // rsp[0]: return address |
| 4123 | // rsp[8]: to |
| 4124 | // rsp[16]: from |
| 4125 | // rsp[24]: string |
| 4126 | |
| 4127 | const int kToOffset = 1 * kPointerSize; |
| 4128 | const int kFromOffset = kToOffset + kPointerSize; |
| 4129 | const int kStringOffset = kFromOffset + kPointerSize; |
| 4130 | const int kArgumentsSize = (kStringOffset + kPointerSize) - kToOffset; |
| 4131 | |
| 4132 | // Make sure first argument is a string. |
| 4133 | __ movq(rax, Operand(rsp, kStringOffset)); |
| 4134 | STATIC_ASSERT(kSmiTag == 0); |
| 4135 | __ testl(rax, Immediate(kSmiTagMask)); |
| 4136 | __ j(zero, &runtime); |
| 4137 | Condition is_string = masm->IsObjectStringType(rax, rbx, rbx); |
| 4138 | __ j(NegateCondition(is_string), &runtime); |
| 4139 | |
| 4140 | // rax: string |
| 4141 | // rbx: instance type |
| 4142 | // Calculate length of sub string using the smi values. |
| 4143 | Label result_longer_than_two; |
| 4144 | __ movq(rcx, Operand(rsp, kToOffset)); |
| 4145 | __ movq(rdx, Operand(rsp, kFromOffset)); |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 4146 | __ JumpUnlessBothNonNegativeSmi(rcx, rdx, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4147 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4148 | __ SmiSub(rcx, rcx, rdx); // Overflow doesn't happen. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4149 | __ cmpq(FieldOperand(rax, String::kLengthOffset), rcx); |
| 4150 | Label return_rax; |
| 4151 | __ j(equal, &return_rax); |
| 4152 | // Special handling of sub-strings of length 1 and 2. One character strings |
| 4153 | // are handled in the runtime system (looked up in the single character |
| 4154 | // cache). Two character strings are looked for in the symbol cache. |
| 4155 | __ SmiToInteger32(rcx, rcx); |
| 4156 | __ cmpl(rcx, Immediate(2)); |
| 4157 | __ j(greater, &result_longer_than_two); |
| 4158 | __ j(less, &runtime); |
| 4159 | |
| 4160 | // Sub string of length 2 requested. |
| 4161 | // rax: string |
| 4162 | // rbx: instance type |
| 4163 | // rcx: sub string length (value is 2) |
| 4164 | // rdx: from index (smi) |
| 4165 | __ JumpIfInstanceTypeIsNotSequentialAscii(rbx, rbx, &runtime); |
| 4166 | |
| 4167 | // Get the two characters forming the sub string. |
| 4168 | __ SmiToInteger32(rdx, rdx); // From index is no longer smi. |
| 4169 | __ movzxbq(rbx, FieldOperand(rax, rdx, times_1, SeqAsciiString::kHeaderSize)); |
| 4170 | __ movzxbq(rcx, |
| 4171 | FieldOperand(rax, rdx, times_1, SeqAsciiString::kHeaderSize + 1)); |
| 4172 | |
| 4173 | // Try to lookup two character string in symbol table. |
| 4174 | Label make_two_character_string; |
| 4175 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
| 4176 | masm, rbx, rcx, rax, rdx, rdi, r14, &make_two_character_string); |
| 4177 | __ ret(3 * kPointerSize); |
| 4178 | |
| 4179 | __ bind(&make_two_character_string); |
| 4180 | // Setup registers for allocating the two character string. |
| 4181 | __ movq(rax, Operand(rsp, kStringOffset)); |
| 4182 | __ movq(rbx, FieldOperand(rax, HeapObject::kMapOffset)); |
| 4183 | __ movzxbl(rbx, FieldOperand(rbx, Map::kInstanceTypeOffset)); |
| 4184 | __ Set(rcx, 2); |
| 4185 | |
| 4186 | __ bind(&result_longer_than_two); |
| 4187 | |
| 4188 | // rax: string |
| 4189 | // rbx: instance type |
| 4190 | // rcx: result string length |
| 4191 | // Check for flat ascii string |
| 4192 | Label non_ascii_flat; |
| 4193 | __ JumpIfInstanceTypeIsNotSequentialAscii(rbx, rbx, &non_ascii_flat); |
| 4194 | |
| 4195 | // Allocate the result. |
| 4196 | __ AllocateAsciiString(rax, rcx, rbx, rdx, rdi, &runtime); |
| 4197 | |
| 4198 | // rax: result string |
| 4199 | // rcx: result string length |
| 4200 | __ movq(rdx, rsi); // esi used by following code. |
| 4201 | // Locate first character of result. |
| 4202 | __ lea(rdi, FieldOperand(rax, SeqAsciiString::kHeaderSize)); |
| 4203 | // Load string argument and locate character of sub string start. |
| 4204 | __ movq(rsi, Operand(rsp, kStringOffset)); |
| 4205 | __ movq(rbx, Operand(rsp, kFromOffset)); |
| 4206 | { |
| 4207 | SmiIndex smi_as_index = masm->SmiToIndex(rbx, rbx, times_1); |
| 4208 | __ lea(rsi, Operand(rsi, smi_as_index.reg, smi_as_index.scale, |
| 4209 | SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 4210 | } |
| 4211 | |
| 4212 | // rax: result string |
| 4213 | // rcx: result length |
| 4214 | // rdx: original value of rsi |
| 4215 | // rdi: first character of result |
| 4216 | // rsi: character of sub string start |
| 4217 | StringHelper::GenerateCopyCharactersREP(masm, rdi, rsi, rcx, true); |
| 4218 | __ movq(rsi, rdx); // Restore rsi. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4219 | Counters* counters = masm->isolate()->counters(); |
| 4220 | __ IncrementCounter(counters->sub_string_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4221 | __ ret(kArgumentsSize); |
| 4222 | |
| 4223 | __ bind(&non_ascii_flat); |
| 4224 | // rax: string |
| 4225 | // rbx: instance type & kStringRepresentationMask | kStringEncodingMask |
| 4226 | // rcx: result string length |
| 4227 | // Check for sequential two byte string |
| 4228 | __ cmpb(rbx, Immediate(kSeqStringTag | kTwoByteStringTag)); |
| 4229 | __ j(not_equal, &runtime); |
| 4230 | |
| 4231 | // Allocate the result. |
| 4232 | __ AllocateTwoByteString(rax, rcx, rbx, rdx, rdi, &runtime); |
| 4233 | |
| 4234 | // rax: result string |
| 4235 | // rcx: result string length |
| 4236 | __ movq(rdx, rsi); // esi used by following code. |
| 4237 | // Locate first character of result. |
| 4238 | __ lea(rdi, FieldOperand(rax, SeqTwoByteString::kHeaderSize)); |
| 4239 | // Load string argument and locate character of sub string start. |
| 4240 | __ movq(rsi, Operand(rsp, kStringOffset)); |
| 4241 | __ movq(rbx, Operand(rsp, kFromOffset)); |
| 4242 | { |
| 4243 | SmiIndex smi_as_index = masm->SmiToIndex(rbx, rbx, times_2); |
| 4244 | __ lea(rsi, Operand(rsi, smi_as_index.reg, smi_as_index.scale, |
| 4245 | SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 4246 | } |
| 4247 | |
| 4248 | // rax: result string |
| 4249 | // rcx: result length |
| 4250 | // rdx: original value of rsi |
| 4251 | // rdi: first character of result |
| 4252 | // rsi: character of sub string start |
| 4253 | StringHelper::GenerateCopyCharactersREP(masm, rdi, rsi, rcx, false); |
| 4254 | __ movq(rsi, rdx); // Restore esi. |
| 4255 | |
| 4256 | __ bind(&return_rax); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4257 | __ IncrementCounter(counters->sub_string_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4258 | __ ret(kArgumentsSize); |
| 4259 | |
| 4260 | // Just jump to runtime to create the sub string. |
| 4261 | __ bind(&runtime); |
| 4262 | __ TailCallRuntime(Runtime::kSubString, 3, 1); |
| 4263 | } |
| 4264 | |
| 4265 | |
| 4266 | void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm, |
| 4267 | Register left, |
| 4268 | Register right, |
| 4269 | Register scratch1, |
| 4270 | Register scratch2, |
| 4271 | Register scratch3, |
| 4272 | Register scratch4) { |
| 4273 | // Ensure that you can always subtract a string length from a non-negative |
| 4274 | // number (e.g. another length). |
| 4275 | STATIC_ASSERT(String::kMaxLength < 0x7fffffff); |
| 4276 | |
| 4277 | // Find minimum length and length difference. |
| 4278 | __ movq(scratch1, FieldOperand(left, String::kLengthOffset)); |
| 4279 | __ movq(scratch4, scratch1); |
| 4280 | __ SmiSub(scratch4, |
| 4281 | scratch4, |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4282 | FieldOperand(right, String::kLengthOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4283 | // Register scratch4 now holds left.length - right.length. |
| 4284 | const Register length_difference = scratch4; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4285 | NearLabel left_shorter; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4286 | __ j(less, &left_shorter); |
| 4287 | // The right string isn't longer that the left one. |
| 4288 | // Get the right string's length by subtracting the (non-negative) difference |
| 4289 | // from the left string's length. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4290 | __ SmiSub(scratch1, scratch1, length_difference); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4291 | __ bind(&left_shorter); |
| 4292 | // Register scratch1 now holds Min(left.length, right.length). |
| 4293 | const Register min_length = scratch1; |
| 4294 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4295 | NearLabel compare_lengths; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4296 | // If min-length is zero, go directly to comparing lengths. |
| 4297 | __ SmiTest(min_length); |
| 4298 | __ j(zero, &compare_lengths); |
| 4299 | |
| 4300 | __ SmiToInteger32(min_length, min_length); |
| 4301 | |
| 4302 | // Registers scratch2 and scratch3 are free. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4303 | NearLabel result_not_equal; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4304 | Label loop; |
| 4305 | { |
| 4306 | // Check characters 0 .. min_length - 1 in a loop. |
| 4307 | // Use scratch3 as loop index, min_length as limit and scratch2 |
| 4308 | // for computation. |
| 4309 | const Register index = scratch3; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 4310 | __ Set(index, 0); // Index into strings. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4311 | __ bind(&loop); |
| 4312 | // Compare characters. |
| 4313 | // TODO(lrn): Could we load more than one character at a time? |
| 4314 | __ movb(scratch2, FieldOperand(left, |
| 4315 | index, |
| 4316 | times_1, |
| 4317 | SeqAsciiString::kHeaderSize)); |
| 4318 | // Increment index and use -1 modifier on next load to give |
| 4319 | // the previous load extra time to complete. |
| 4320 | __ addl(index, Immediate(1)); |
| 4321 | __ cmpb(scratch2, FieldOperand(right, |
| 4322 | index, |
| 4323 | times_1, |
| 4324 | SeqAsciiString::kHeaderSize - 1)); |
| 4325 | __ j(not_equal, &result_not_equal); |
| 4326 | __ cmpl(index, min_length); |
| 4327 | __ j(not_equal, &loop); |
| 4328 | } |
| 4329 | // Completed loop without finding different characters. |
| 4330 | // Compare lengths (precomputed). |
| 4331 | __ bind(&compare_lengths); |
| 4332 | __ SmiTest(length_difference); |
| 4333 | __ j(not_zero, &result_not_equal); |
| 4334 | |
| 4335 | // Result is EQUAL. |
| 4336 | __ Move(rax, Smi::FromInt(EQUAL)); |
| 4337 | __ ret(0); |
| 4338 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4339 | NearLabel result_greater; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4340 | __ bind(&result_not_equal); |
| 4341 | // Unequal comparison of left to right, either character or length. |
| 4342 | __ j(greater, &result_greater); |
| 4343 | |
| 4344 | // Result is LESS. |
| 4345 | __ Move(rax, Smi::FromInt(LESS)); |
| 4346 | __ ret(0); |
| 4347 | |
| 4348 | // Result is GREATER. |
| 4349 | __ bind(&result_greater); |
| 4350 | __ Move(rax, Smi::FromInt(GREATER)); |
| 4351 | __ ret(0); |
| 4352 | } |
| 4353 | |
| 4354 | |
| 4355 | void StringCompareStub::Generate(MacroAssembler* masm) { |
| 4356 | Label runtime; |
| 4357 | |
| 4358 | // Stack frame on entry. |
| 4359 | // rsp[0]: return address |
| 4360 | // rsp[8]: right string |
| 4361 | // rsp[16]: left string |
| 4362 | |
| 4363 | __ movq(rdx, Operand(rsp, 2 * kPointerSize)); // left |
| 4364 | __ movq(rax, Operand(rsp, 1 * kPointerSize)); // right |
| 4365 | |
| 4366 | // Check for identity. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4367 | NearLabel not_same; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4368 | __ cmpq(rdx, rax); |
| 4369 | __ j(not_equal, ¬_same); |
| 4370 | __ Move(rax, Smi::FromInt(EQUAL)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4371 | Counters* counters = masm->isolate()->counters(); |
| 4372 | __ IncrementCounter(counters->string_compare_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4373 | __ ret(2 * kPointerSize); |
| 4374 | |
| 4375 | __ bind(¬_same); |
| 4376 | |
| 4377 | // Check that both are sequential ASCII strings. |
| 4378 | __ JumpIfNotBothSequentialAsciiStrings(rdx, rax, rcx, rbx, &runtime); |
| 4379 | |
| 4380 | // Inline comparison of ascii strings. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4381 | __ IncrementCounter(counters->string_compare_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4382 | // Drop arguments from the stack |
| 4383 | __ pop(rcx); |
| 4384 | __ addq(rsp, Immediate(2 * kPointerSize)); |
| 4385 | __ push(rcx); |
| 4386 | GenerateCompareFlatAsciiStrings(masm, rdx, rax, rcx, rbx, rdi, r8); |
| 4387 | |
| 4388 | // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater) |
| 4389 | // tagged as a small integer. |
| 4390 | __ bind(&runtime); |
| 4391 | __ TailCallRuntime(Runtime::kStringCompare, 2, 1); |
| 4392 | } |
| 4393 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 4394 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4395 | void ICCompareStub::GenerateSmis(MacroAssembler* masm) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4396 | ASSERT(state_ == CompareIC::SMIS); |
| 4397 | NearLabel miss; |
| 4398 | __ JumpIfNotBothSmi(rdx, rax, &miss); |
| 4399 | |
| 4400 | if (GetCondition() == equal) { |
| 4401 | // For equality we do not care about the sign of the result. |
| 4402 | __ subq(rax, rdx); |
| 4403 | } else { |
| 4404 | NearLabel done; |
| 4405 | __ subq(rdx, rax); |
| 4406 | __ j(no_overflow, &done); |
| 4407 | // Correct sign of result in case of overflow. |
| 4408 | __ SmiNot(rdx, rdx); |
| 4409 | __ bind(&done); |
| 4410 | __ movq(rax, rdx); |
| 4411 | } |
| 4412 | __ ret(0); |
| 4413 | |
| 4414 | __ bind(&miss); |
| 4415 | GenerateMiss(masm); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4416 | } |
| 4417 | |
| 4418 | |
| 4419 | void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4420 | ASSERT(state_ == CompareIC::HEAP_NUMBERS); |
| 4421 | |
| 4422 | NearLabel generic_stub; |
| 4423 | NearLabel unordered; |
| 4424 | NearLabel miss; |
| 4425 | Condition either_smi = masm->CheckEitherSmi(rax, rdx); |
| 4426 | __ j(either_smi, &generic_stub); |
| 4427 | |
| 4428 | __ CmpObjectType(rax, HEAP_NUMBER_TYPE, rcx); |
| 4429 | __ j(not_equal, &miss); |
| 4430 | __ CmpObjectType(rdx, HEAP_NUMBER_TYPE, rcx); |
| 4431 | __ j(not_equal, &miss); |
| 4432 | |
| 4433 | // Load left and right operand |
| 4434 | __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset)); |
| 4435 | __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset)); |
| 4436 | |
| 4437 | // Compare operands |
| 4438 | __ ucomisd(xmm0, xmm1); |
| 4439 | |
| 4440 | // Don't base result on EFLAGS when a NaN is involved. |
| 4441 | __ j(parity_even, &unordered); |
| 4442 | |
| 4443 | // Return a result of -1, 0, or 1, based on EFLAGS. |
| 4444 | // Performing mov, because xor would destroy the flag register. |
| 4445 | __ movl(rax, Immediate(0)); |
| 4446 | __ movl(rcx, Immediate(0)); |
| 4447 | __ setcc(above, rax); // Add one to zero if carry clear and not equal. |
| 4448 | __ sbbq(rax, rcx); // Subtract one if below (aka. carry set). |
| 4449 | __ ret(0); |
| 4450 | |
| 4451 | __ bind(&unordered); |
| 4452 | |
| 4453 | CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS); |
| 4454 | __ bind(&generic_stub); |
| 4455 | __ jmp(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 4456 | |
| 4457 | __ bind(&miss); |
| 4458 | GenerateMiss(masm); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4459 | } |
| 4460 | |
| 4461 | |
| 4462 | void ICCompareStub::GenerateObjects(MacroAssembler* masm) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4463 | ASSERT(state_ == CompareIC::OBJECTS); |
| 4464 | NearLabel miss; |
| 4465 | Condition either_smi = masm->CheckEitherSmi(rdx, rax); |
| 4466 | __ j(either_smi, &miss); |
| 4467 | |
| 4468 | __ CmpObjectType(rax, JS_OBJECT_TYPE, rcx); |
| 4469 | __ j(not_equal, &miss, not_taken); |
| 4470 | __ CmpObjectType(rdx, JS_OBJECT_TYPE, rcx); |
| 4471 | __ j(not_equal, &miss, not_taken); |
| 4472 | |
| 4473 | ASSERT(GetCondition() == equal); |
| 4474 | __ subq(rax, rdx); |
| 4475 | __ ret(0); |
| 4476 | |
| 4477 | __ bind(&miss); |
| 4478 | GenerateMiss(masm); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4479 | } |
| 4480 | |
| 4481 | |
| 4482 | void ICCompareStub::GenerateMiss(MacroAssembler* masm) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4483 | // Save the registers. |
| 4484 | __ pop(rcx); |
| 4485 | __ push(rdx); |
| 4486 | __ push(rax); |
| 4487 | __ push(rcx); |
| 4488 | |
| 4489 | // Call the runtime system in a fresh internal frame. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4490 | ExternalReference miss = |
| 4491 | ExternalReference(IC_Utility(IC::kCompareIC_Miss), masm->isolate()); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4492 | __ EnterInternalFrame(); |
| 4493 | __ push(rdx); |
| 4494 | __ push(rax); |
| 4495 | __ Push(Smi::FromInt(op_)); |
| 4496 | __ CallExternalReference(miss, 3); |
| 4497 | __ LeaveInternalFrame(); |
| 4498 | |
| 4499 | // Compute the entry point of the rewritten stub. |
| 4500 | __ lea(rdi, FieldOperand(rax, Code::kHeaderSize)); |
| 4501 | |
| 4502 | // Restore registers. |
| 4503 | __ pop(rcx); |
| 4504 | __ pop(rax); |
| 4505 | __ pop(rdx); |
| 4506 | __ push(rcx); |
| 4507 | |
| 4508 | // Do a tail call to the rewritten stub. |
| 4509 | __ jmp(rdi); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4510 | } |
| 4511 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4512 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4513 | #undef __ |
| 4514 | |
| 4515 | } } // namespace v8::internal |
| 4516 | |
| 4517 | #endif // V8_TARGET_ARCH_X64 |