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_IA32) |
| 31 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 32 | #include "bootstrapper.h" |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 33 | #include "code-stubs.h" |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 34 | #include "isolate.h" |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 35 | #include "jsregexp.h" |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 36 | #include "regexp-macro-assembler.h" |
| 37 | |
| 38 | namespace v8 { |
| 39 | namespace internal { |
| 40 | |
| 41 | #define __ ACCESS_MASM(masm) |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 42 | |
| 43 | void ToNumberStub::Generate(MacroAssembler* masm) { |
| 44 | // The ToNumber stub takes one argument in eax. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 45 | Label check_heap_number, call_builtin; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 46 | __ test(eax, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 47 | __ j(not_zero, &check_heap_number, Label::kNear); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 48 | __ ret(0); |
| 49 | |
| 50 | __ bind(&check_heap_number); |
| 51 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 52 | Factory* factory = masm->isolate()->factory(); |
| 53 | __ cmp(Operand(ebx), Immediate(factory->heap_number_map())); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 54 | __ j(not_equal, &call_builtin, Label::kNear); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 55 | __ ret(0); |
| 56 | |
| 57 | __ bind(&call_builtin); |
| 58 | __ pop(ecx); // Pop return address. |
| 59 | __ push(eax); |
| 60 | __ push(ecx); // Push return address. |
| 61 | __ InvokeBuiltin(Builtins::TO_NUMBER, JUMP_FUNCTION); |
| 62 | } |
| 63 | |
| 64 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 65 | void FastNewClosureStub::Generate(MacroAssembler* masm) { |
| 66 | // Create a new closure from the given function info in new |
| 67 | // space. Set the context to the current context in esi. |
| 68 | Label gc; |
| 69 | __ AllocateInNewSpace(JSFunction::kSize, eax, ebx, ecx, &gc, TAG_OBJECT); |
| 70 | |
| 71 | // Get the function info from the stack. |
| 72 | __ mov(edx, Operand(esp, 1 * kPointerSize)); |
| 73 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 74 | int map_index = strict_mode_ == kStrictMode |
| 75 | ? Context::STRICT_MODE_FUNCTION_MAP_INDEX |
| 76 | : Context::FUNCTION_MAP_INDEX; |
| 77 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 78 | // Compute the function map in the current global context and set that |
| 79 | // as the map of the allocated object. |
| 80 | __ mov(ecx, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 81 | __ mov(ecx, FieldOperand(ecx, GlobalObject::kGlobalContextOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 82 | __ mov(ecx, Operand(ecx, Context::SlotOffset(map_index))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 83 | __ mov(FieldOperand(eax, JSObject::kMapOffset), ecx); |
| 84 | |
| 85 | // Initialize the rest of the function. We don't have to update the |
| 86 | // write barrier because the allocated object is in new space. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 87 | Factory* factory = masm->isolate()->factory(); |
| 88 | __ mov(ebx, Immediate(factory->empty_fixed_array())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 89 | __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), ebx); |
| 90 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), ebx); |
| 91 | __ mov(FieldOperand(eax, JSFunction::kPrototypeOrInitialMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 92 | Immediate(factory->the_hole_value())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 93 | __ mov(FieldOperand(eax, JSFunction::kSharedFunctionInfoOffset), edx); |
| 94 | __ mov(FieldOperand(eax, JSFunction::kContextOffset), esi); |
| 95 | __ mov(FieldOperand(eax, JSFunction::kLiteralsOffset), ebx); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 96 | __ mov(FieldOperand(eax, JSFunction::kNextFunctionLinkOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 97 | Immediate(factory->undefined_value())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 98 | |
| 99 | // Initialize the code pointer in the function to be the one |
| 100 | // found in the shared function info object. |
| 101 | __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset)); |
| 102 | __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); |
| 103 | __ mov(FieldOperand(eax, JSFunction::kCodeEntryOffset), edx); |
| 104 | |
| 105 | // Return and remove the on-stack parameter. |
| 106 | __ ret(1 * kPointerSize); |
| 107 | |
| 108 | // Create a new closure through the slower runtime call. |
| 109 | __ bind(&gc); |
| 110 | __ pop(ecx); // Temporarily remove return address. |
| 111 | __ pop(edx); |
| 112 | __ push(esi); |
| 113 | __ push(edx); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 114 | __ push(Immediate(factory->false_value())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 115 | __ push(ecx); // Restore return address. |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 116 | __ TailCallRuntime(Runtime::kNewClosure, 3, 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | |
| 120 | void FastNewContextStub::Generate(MacroAssembler* masm) { |
| 121 | // Try to allocate the context in new space. |
| 122 | Label gc; |
| 123 | int length = slots_ + Context::MIN_CONTEXT_SLOTS; |
| 124 | __ AllocateInNewSpace((length * kPointerSize) + FixedArray::kHeaderSize, |
| 125 | eax, ebx, ecx, &gc, TAG_OBJECT); |
| 126 | |
| 127 | // Get the function from the stack. |
| 128 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); |
| 129 | |
| 130 | // Setup the object header. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 131 | Factory* factory = masm->isolate()->factory(); |
| 132 | __ mov(FieldOperand(eax, HeapObject::kMapOffset), factory->context_map()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 133 | __ mov(FieldOperand(eax, Context::kLengthOffset), |
| 134 | Immediate(Smi::FromInt(length))); |
| 135 | |
| 136 | // Setup the fixed slots. |
Steve Block | 9fac840 | 2011-05-12 15:51:54 +0100 | [diff] [blame] | 137 | __ Set(ebx, Immediate(0)); // Set to NULL. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 138 | __ mov(Operand(eax, Context::SlotOffset(Context::CLOSURE_INDEX)), ecx); |
| 139 | __ mov(Operand(eax, Context::SlotOffset(Context::FCONTEXT_INDEX)), eax); |
| 140 | __ mov(Operand(eax, Context::SlotOffset(Context::PREVIOUS_INDEX)), ebx); |
| 141 | __ mov(Operand(eax, Context::SlotOffset(Context::EXTENSION_INDEX)), ebx); |
| 142 | |
| 143 | // Copy the global object from the surrounding context. We go through the |
| 144 | // context in the function (ecx) to match the allocation behavior we have |
| 145 | // in the runtime system (see Heap::AllocateFunctionContext). |
| 146 | __ mov(ebx, FieldOperand(ecx, JSFunction::kContextOffset)); |
| 147 | __ mov(ebx, Operand(ebx, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 148 | __ mov(Operand(eax, Context::SlotOffset(Context::GLOBAL_INDEX)), ebx); |
| 149 | |
| 150 | // Initialize the rest of the slots to undefined. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 151 | __ mov(ebx, factory->undefined_value()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 152 | for (int i = Context::MIN_CONTEXT_SLOTS; i < length; i++) { |
| 153 | __ mov(Operand(eax, Context::SlotOffset(i)), ebx); |
| 154 | } |
| 155 | |
| 156 | // Return and remove the on-stack parameter. |
| 157 | __ mov(esi, Operand(eax)); |
| 158 | __ ret(1 * kPointerSize); |
| 159 | |
| 160 | // Need to collect. Call into runtime system. |
| 161 | __ bind(&gc); |
| 162 | __ TailCallRuntime(Runtime::kNewContext, 1, 1); |
| 163 | } |
| 164 | |
| 165 | |
| 166 | void FastCloneShallowArrayStub::Generate(MacroAssembler* masm) { |
| 167 | // Stack layout on entry: |
| 168 | // |
| 169 | // [esp + kPointerSize]: constant elements. |
| 170 | // [esp + (2 * kPointerSize)]: literal index. |
| 171 | // [esp + (3 * kPointerSize)]: literals array. |
| 172 | |
| 173 | // All sizes here are multiples of kPointerSize. |
| 174 | int elements_size = (length_ > 0) ? FixedArray::SizeFor(length_) : 0; |
| 175 | int size = JSArray::kSize + elements_size; |
| 176 | |
| 177 | // Load boilerplate object into ecx and check if we need to create a |
| 178 | // boilerplate. |
| 179 | Label slow_case; |
| 180 | __ mov(ecx, Operand(esp, 3 * kPointerSize)); |
| 181 | __ mov(eax, Operand(esp, 2 * kPointerSize)); |
| 182 | STATIC_ASSERT(kPointerSize == 4); |
| 183 | STATIC_ASSERT(kSmiTagSize == 1); |
| 184 | STATIC_ASSERT(kSmiTag == 0); |
| 185 | __ mov(ecx, FieldOperand(ecx, eax, times_half_pointer_size, |
| 186 | FixedArray::kHeaderSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 187 | Factory* factory = masm->isolate()->factory(); |
| 188 | __ cmp(ecx, factory->undefined_value()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 189 | __ j(equal, &slow_case); |
| 190 | |
| 191 | if (FLAG_debug_code) { |
| 192 | const char* message; |
| 193 | Handle<Map> expected_map; |
| 194 | if (mode_ == CLONE_ELEMENTS) { |
| 195 | message = "Expected (writable) fixed array"; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 196 | expected_map = factory->fixed_array_map(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 197 | } else { |
| 198 | ASSERT(mode_ == COPY_ON_WRITE_ELEMENTS); |
| 199 | message = "Expected copy-on-write fixed array"; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 200 | expected_map = factory->fixed_cow_array_map(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 201 | } |
| 202 | __ push(ecx); |
| 203 | __ mov(ecx, FieldOperand(ecx, JSArray::kElementsOffset)); |
| 204 | __ cmp(FieldOperand(ecx, HeapObject::kMapOffset), expected_map); |
| 205 | __ Assert(equal, message); |
| 206 | __ pop(ecx); |
| 207 | } |
| 208 | |
| 209 | // Allocate both the JS array and the elements array in one big |
| 210 | // allocation. This avoids multiple limit checks. |
| 211 | __ AllocateInNewSpace(size, eax, ebx, edx, &slow_case, TAG_OBJECT); |
| 212 | |
| 213 | // Copy the JS array part. |
| 214 | for (int i = 0; i < JSArray::kSize; i += kPointerSize) { |
| 215 | if ((i != JSArray::kElementsOffset) || (length_ == 0)) { |
| 216 | __ mov(ebx, FieldOperand(ecx, i)); |
| 217 | __ mov(FieldOperand(eax, i), ebx); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | if (length_ > 0) { |
| 222 | // Get hold of the elements array of the boilerplate and setup the |
| 223 | // elements pointer in the resulting object. |
| 224 | __ mov(ecx, FieldOperand(ecx, JSArray::kElementsOffset)); |
| 225 | __ lea(edx, Operand(eax, JSArray::kSize)); |
| 226 | __ mov(FieldOperand(eax, JSArray::kElementsOffset), edx); |
| 227 | |
| 228 | // Copy the elements array. |
| 229 | for (int i = 0; i < elements_size; i += kPointerSize) { |
| 230 | __ mov(ebx, FieldOperand(ecx, i)); |
| 231 | __ mov(FieldOperand(edx, i), ebx); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | // Return and remove the on-stack parameters. |
| 236 | __ ret(3 * kPointerSize); |
| 237 | |
| 238 | __ bind(&slow_case); |
| 239 | __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1); |
| 240 | } |
| 241 | |
| 242 | |
| 243 | // NOTE: The stub does not handle the inlined cases (Smis, Booleans, undefined). |
| 244 | void ToBooleanStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 245 | Label false_result, true_result, not_string; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 246 | __ mov(eax, Operand(esp, 1 * kPointerSize)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 247 | Factory* factory = masm->isolate()->factory(); |
| 248 | |
| 249 | // undefined -> false |
| 250 | __ cmp(eax, factory->undefined_value()); |
| 251 | __ j(equal, &false_result); |
| 252 | |
| 253 | // Boolean -> its value |
| 254 | __ cmp(eax, factory->true_value()); |
| 255 | __ j(equal, &true_result); |
| 256 | __ cmp(eax, factory->false_value()); |
| 257 | __ j(equal, &false_result); |
| 258 | |
| 259 | // Smis: 0 -> false, all other -> true |
| 260 | __ test(eax, Operand(eax)); |
| 261 | __ j(zero, &false_result); |
| 262 | __ test(eax, Immediate(kSmiTagMask)); |
| 263 | __ j(zero, &true_result); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 264 | |
| 265 | // 'null' => false. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 266 | __ cmp(eax, factory->null_value()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 267 | __ j(equal, &false_result, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 268 | |
| 269 | // Get the map and type of the heap object. |
| 270 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 271 | __ movzx_b(ecx, FieldOperand(edx, Map::kInstanceTypeOffset)); |
| 272 | |
| 273 | // Undetectable => false. |
| 274 | __ test_b(FieldOperand(edx, Map::kBitFieldOffset), |
| 275 | 1 << Map::kIsUndetectable); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 276 | __ j(not_zero, &false_result, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 277 | |
| 278 | // JavaScript object => true. |
| 279 | __ CmpInstanceType(edx, FIRST_JS_OBJECT_TYPE); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 280 | __ j(above_equal, &true_result, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 281 | |
| 282 | // String value => false iff empty. |
| 283 | __ CmpInstanceType(edx, FIRST_NONSTRING_TYPE); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 284 | __ j(above_equal, ¬_string, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 285 | STATIC_ASSERT(kSmiTag == 0); |
| 286 | __ cmp(FieldOperand(eax, String::kLengthOffset), Immediate(0)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 287 | __ j(zero, &false_result, Label::kNear); |
| 288 | __ jmp(&true_result, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 289 | |
| 290 | __ bind(¬_string); |
| 291 | // HeapNumber => false iff +0, -0, or NaN. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 292 | __ cmp(edx, factory->heap_number_map()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 293 | __ j(not_equal, &true_result, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 294 | __ fldz(); |
| 295 | __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 296 | __ FCmp(); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 297 | __ j(zero, &false_result, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 298 | // Fall through to |true_result|. |
| 299 | |
| 300 | // Return 1/0 for true/false in eax. |
| 301 | __ bind(&true_result); |
| 302 | __ mov(eax, 1); |
| 303 | __ ret(1 * kPointerSize); |
| 304 | __ bind(&false_result); |
| 305 | __ mov(eax, 0); |
| 306 | __ ret(1 * kPointerSize); |
| 307 | } |
| 308 | |
| 309 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 310 | class FloatingPointHelper : public AllStatic { |
| 311 | public: |
| 312 | |
| 313 | enum ArgLocation { |
| 314 | ARGS_ON_STACK, |
| 315 | ARGS_IN_REGISTERS |
| 316 | }; |
| 317 | |
| 318 | // Code pattern for loading a floating point value. Input value must |
| 319 | // be either a smi or a heap number object (fp value). Requirements: |
| 320 | // operand in register number. Returns operand as floating point number |
| 321 | // on FPU stack. |
| 322 | static void LoadFloatOperand(MacroAssembler* masm, Register number); |
| 323 | |
| 324 | // Code pattern for loading floating point values. Input values must |
| 325 | // be either smi or heap number objects (fp values). Requirements: |
| 326 | // operand_1 on TOS+1 or in edx, operand_2 on TOS+2 or in eax. |
| 327 | // Returns operands as floating point numbers on FPU stack. |
| 328 | static void LoadFloatOperands(MacroAssembler* masm, |
| 329 | Register scratch, |
| 330 | ArgLocation arg_location = ARGS_ON_STACK); |
| 331 | |
| 332 | // Similar to LoadFloatOperand but assumes that both operands are smis. |
| 333 | // Expects operands in edx, eax. |
| 334 | static void LoadFloatSmis(MacroAssembler* masm, Register scratch); |
| 335 | |
| 336 | // Test if operands are smi or number objects (fp). Requirements: |
| 337 | // operand_1 in eax, operand_2 in edx; falls through on float |
| 338 | // operands, jumps to the non_float label otherwise. |
| 339 | static void CheckFloatOperands(MacroAssembler* masm, |
| 340 | Label* non_float, |
| 341 | Register scratch); |
| 342 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 343 | // Checks that the two floating point numbers on top of the FPU stack |
| 344 | // have int32 values. |
| 345 | static void CheckFloatOperandsAreInt32(MacroAssembler* masm, |
| 346 | Label* non_int32); |
| 347 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 348 | // Takes the operands in edx and eax and loads them as integers in eax |
| 349 | // and ecx. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 350 | static void LoadUnknownsAsIntegers(MacroAssembler* masm, |
| 351 | bool use_sse3, |
| 352 | Label* operand_conversion_failure); |
| 353 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 354 | // Must only be called after LoadUnknownsAsIntegers. Assumes that the |
| 355 | // operands are pushed on the stack, and that their conversions to int32 |
| 356 | // are in eax and ecx. Checks that the original numbers were in the int32 |
| 357 | // range. |
| 358 | static void CheckLoadedIntegersWereInt32(MacroAssembler* masm, |
| 359 | bool use_sse3, |
| 360 | Label* not_int32); |
| 361 | |
| 362 | // Assumes that operands are smis or heap numbers and loads them |
| 363 | // into xmm0 and xmm1. Operands are in edx and eax. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 364 | // Leaves operands unchanged. |
| 365 | static void LoadSSE2Operands(MacroAssembler* masm); |
| 366 | |
| 367 | // Test if operands are numbers (smi or HeapNumber objects), and load |
| 368 | // them into xmm0 and xmm1 if they are. Jump to label not_numbers if |
| 369 | // either operand is not a number. Operands are in edx and eax. |
| 370 | // Leaves operands unchanged. |
| 371 | static void LoadSSE2Operands(MacroAssembler* masm, Label* not_numbers); |
| 372 | |
| 373 | // Similar to LoadSSE2Operands but assumes that both operands are smis. |
| 374 | // Expects operands in edx, eax. |
| 375 | static void LoadSSE2Smis(MacroAssembler* masm, Register scratch); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 376 | |
| 377 | // Checks that the two floating point numbers loaded into xmm0 and xmm1 |
| 378 | // have int32 values. |
| 379 | static void CheckSSE2OperandsAreInt32(MacroAssembler* masm, |
| 380 | Label* non_int32, |
| 381 | Register scratch); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 382 | }; |
| 383 | |
| 384 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 385 | // Get the integer part of a heap number. Surprisingly, all this bit twiddling |
| 386 | // is faster than using the built-in instructions on floating point registers. |
| 387 | // Trashes edi and ebx. Dest is ecx. Source cannot be ecx or one of the |
| 388 | // trashed registers. |
| 389 | static void IntegerConvert(MacroAssembler* masm, |
| 390 | Register source, |
| 391 | bool use_sse3, |
| 392 | Label* conversion_failure) { |
| 393 | ASSERT(!source.is(ecx) && !source.is(edi) && !source.is(ebx)); |
| 394 | Label done, right_exponent, normal_exponent; |
| 395 | Register scratch = ebx; |
| 396 | Register scratch2 = edi; |
| 397 | // Get exponent word. |
| 398 | __ mov(scratch, FieldOperand(source, HeapNumber::kExponentOffset)); |
| 399 | // Get exponent alone in scratch2. |
| 400 | __ mov(scratch2, scratch); |
| 401 | __ and_(scratch2, HeapNumber::kExponentMask); |
| 402 | if (use_sse3) { |
| 403 | CpuFeatures::Scope scope(SSE3); |
| 404 | // Check whether the exponent is too big for a 64 bit signed integer. |
| 405 | static const uint32_t kTooBigExponent = |
| 406 | (HeapNumber::kExponentBias + 63) << HeapNumber::kExponentShift; |
| 407 | __ cmp(Operand(scratch2), Immediate(kTooBigExponent)); |
| 408 | __ j(greater_equal, conversion_failure); |
| 409 | // Load x87 register with heap number. |
| 410 | __ fld_d(FieldOperand(source, HeapNumber::kValueOffset)); |
| 411 | // Reserve space for 64 bit answer. |
| 412 | __ sub(Operand(esp), Immediate(sizeof(uint64_t))); // Nolint. |
| 413 | // Do conversion, which cannot fail because we checked the exponent. |
| 414 | __ fisttp_d(Operand(esp, 0)); |
| 415 | __ mov(ecx, Operand(esp, 0)); // Load low word of answer into ecx. |
| 416 | __ add(Operand(esp), Immediate(sizeof(uint64_t))); // Nolint. |
| 417 | } else { |
| 418 | // Load ecx with zero. We use this either for the final shift or |
| 419 | // for the answer. |
| 420 | __ xor_(ecx, Operand(ecx)); |
| 421 | // Check whether the exponent matches a 32 bit signed int that cannot be |
| 422 | // represented by a Smi. A non-smi 32 bit integer is 1.xxx * 2^30 so the |
| 423 | // exponent is 30 (biased). This is the exponent that we are fastest at and |
| 424 | // also the highest exponent we can handle here. |
| 425 | const uint32_t non_smi_exponent = |
| 426 | (HeapNumber::kExponentBias + 30) << HeapNumber::kExponentShift; |
| 427 | __ cmp(Operand(scratch2), Immediate(non_smi_exponent)); |
| 428 | // If we have a match of the int32-but-not-Smi exponent then skip some |
| 429 | // logic. |
| 430 | __ j(equal, &right_exponent); |
| 431 | // If the exponent is higher than that then go to slow case. This catches |
| 432 | // numbers that don't fit in a signed int32, infinities and NaNs. |
| 433 | __ j(less, &normal_exponent); |
| 434 | |
| 435 | { |
| 436 | // Handle a big exponent. The only reason we have this code is that the |
| 437 | // >>> operator has a tendency to generate numbers with an exponent of 31. |
| 438 | const uint32_t big_non_smi_exponent = |
| 439 | (HeapNumber::kExponentBias + 31) << HeapNumber::kExponentShift; |
| 440 | __ cmp(Operand(scratch2), Immediate(big_non_smi_exponent)); |
| 441 | __ j(not_equal, conversion_failure); |
| 442 | // We have the big exponent, typically from >>>. This means the number is |
| 443 | // in the range 2^31 to 2^32 - 1. Get the top bits of the mantissa. |
| 444 | __ mov(scratch2, scratch); |
| 445 | __ and_(scratch2, HeapNumber::kMantissaMask); |
| 446 | // Put back the implicit 1. |
| 447 | __ or_(scratch2, 1 << HeapNumber::kExponentShift); |
| 448 | // Shift up the mantissa bits to take up the space the exponent used to |
| 449 | // take. We just orred in the implicit bit so that took care of one and |
| 450 | // we want to use the full unsigned range so we subtract 1 bit from the |
| 451 | // shift distance. |
| 452 | const int big_shift_distance = HeapNumber::kNonMantissaBitsInTopWord - 1; |
| 453 | __ shl(scratch2, big_shift_distance); |
| 454 | // Get the second half of the double. |
| 455 | __ mov(ecx, FieldOperand(source, HeapNumber::kMantissaOffset)); |
| 456 | // Shift down 21 bits to get the most significant 11 bits or the low |
| 457 | // mantissa word. |
| 458 | __ shr(ecx, 32 - big_shift_distance); |
| 459 | __ or_(ecx, Operand(scratch2)); |
| 460 | // We have the answer in ecx, but we may need to negate it. |
| 461 | __ test(scratch, Operand(scratch)); |
| 462 | __ j(positive, &done); |
| 463 | __ neg(ecx); |
| 464 | __ jmp(&done); |
| 465 | } |
| 466 | |
| 467 | __ bind(&normal_exponent); |
| 468 | // Exponent word in scratch, exponent part of exponent word in scratch2. |
| 469 | // Zero in ecx. |
| 470 | // We know the exponent is smaller than 30 (biased). If it is less than |
| 471 | // 0 (biased) then the number is smaller in magnitude than 1.0 * 2^0, ie |
| 472 | // it rounds to zero. |
| 473 | const uint32_t zero_exponent = |
| 474 | (HeapNumber::kExponentBias + 0) << HeapNumber::kExponentShift; |
| 475 | __ sub(Operand(scratch2), Immediate(zero_exponent)); |
| 476 | // ecx already has a Smi zero. |
| 477 | __ j(less, &done); |
| 478 | |
| 479 | // We have a shifted exponent between 0 and 30 in scratch2. |
| 480 | __ shr(scratch2, HeapNumber::kExponentShift); |
| 481 | __ mov(ecx, Immediate(30)); |
| 482 | __ sub(ecx, Operand(scratch2)); |
| 483 | |
| 484 | __ bind(&right_exponent); |
| 485 | // Here ecx is the shift, scratch is the exponent word. |
| 486 | // Get the top bits of the mantissa. |
| 487 | __ and_(scratch, HeapNumber::kMantissaMask); |
| 488 | // Put back the implicit 1. |
| 489 | __ or_(scratch, 1 << HeapNumber::kExponentShift); |
| 490 | // Shift up the mantissa bits to take up the space the exponent used to |
| 491 | // take. We have kExponentShift + 1 significant bits int he low end of the |
| 492 | // word. Shift them to the top bits. |
| 493 | const int shift_distance = HeapNumber::kNonMantissaBitsInTopWord - 2; |
| 494 | __ shl(scratch, shift_distance); |
| 495 | // Get the second half of the double. For some exponents we don't |
| 496 | // actually need this because the bits get shifted out again, but |
| 497 | // it's probably slower to test than just to do it. |
| 498 | __ mov(scratch2, FieldOperand(source, HeapNumber::kMantissaOffset)); |
| 499 | // Shift down 22 bits to get the most significant 10 bits or the low |
| 500 | // mantissa word. |
| 501 | __ shr(scratch2, 32 - shift_distance); |
| 502 | __ or_(scratch2, Operand(scratch)); |
| 503 | // Move down according to the exponent. |
| 504 | __ shr_cl(scratch2); |
| 505 | // Now the unsigned answer is in scratch2. We need to move it to ecx and |
| 506 | // we may need to fix the sign. |
| 507 | Label negative; |
| 508 | __ xor_(ecx, Operand(ecx)); |
| 509 | __ cmp(ecx, FieldOperand(source, HeapNumber::kExponentOffset)); |
| 510 | __ j(greater, &negative, Label::kNear); |
| 511 | __ mov(ecx, scratch2); |
| 512 | __ jmp(&done, Label::kNear); |
| 513 | __ bind(&negative); |
| 514 | __ sub(ecx, Operand(scratch2)); |
| 515 | __ bind(&done); |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | |
| 520 | Handle<Code> GetUnaryOpStub(int key, UnaryOpIC::TypeInfo type_info) { |
| 521 | UnaryOpStub stub(key, type_info); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 522 | return stub.GetCode(); |
| 523 | } |
| 524 | |
| 525 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 526 | const char* UnaryOpStub::GetName() { |
| 527 | if (name_ != NULL) return name_; |
| 528 | const int kMaxNameLength = 100; |
| 529 | name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray( |
| 530 | kMaxNameLength); |
| 531 | if (name_ == NULL) return "OOM"; |
| 532 | const char* op_name = Token::Name(op_); |
| 533 | const char* overwrite_name = NULL; // Make g++ happy. |
| 534 | switch (mode_) { |
| 535 | case UNARY_NO_OVERWRITE: overwrite_name = "Alloc"; break; |
| 536 | case UNARY_OVERWRITE: overwrite_name = "Overwrite"; break; |
| 537 | } |
| 538 | |
| 539 | OS::SNPrintF(Vector<char>(name_, kMaxNameLength), |
| 540 | "UnaryOpStub_%s_%s_%s", |
| 541 | op_name, |
| 542 | overwrite_name, |
| 543 | UnaryOpIC::GetName(operand_type_)); |
| 544 | return name_; |
| 545 | } |
| 546 | |
| 547 | |
| 548 | // TODO(svenpanne): Use virtual functions instead of switch. |
| 549 | void UnaryOpStub::Generate(MacroAssembler* masm) { |
| 550 | switch (operand_type_) { |
| 551 | case UnaryOpIC::UNINITIALIZED: |
| 552 | GenerateTypeTransition(masm); |
| 553 | break; |
| 554 | case UnaryOpIC::SMI: |
| 555 | GenerateSmiStub(masm); |
| 556 | break; |
| 557 | case UnaryOpIC::HEAP_NUMBER: |
| 558 | GenerateHeapNumberStub(masm); |
| 559 | break; |
| 560 | case UnaryOpIC::GENERIC: |
| 561 | GenerateGenericStub(masm); |
| 562 | break; |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | |
| 567 | void UnaryOpStub::GenerateTypeTransition(MacroAssembler* masm) { |
| 568 | __ pop(ecx); // Save return address. |
| 569 | __ push(eax); |
| 570 | // the argument is now on top. |
| 571 | // Push this stub's key. Although the operation and the type info are |
| 572 | // encoded into the key, the encoding is opaque, so push them too. |
| 573 | __ push(Immediate(Smi::FromInt(MinorKey()))); |
| 574 | __ push(Immediate(Smi::FromInt(op_))); |
| 575 | __ push(Immediate(Smi::FromInt(operand_type_))); |
| 576 | |
| 577 | __ push(ecx); // Push return address. |
| 578 | |
| 579 | // Patch the caller to an appropriate specialized stub and return the |
| 580 | // operation result to the caller of the stub. |
| 581 | __ TailCallExternalReference( |
| 582 | ExternalReference(IC_Utility(IC::kUnaryOp_Patch), |
| 583 | masm->isolate()), 4, 1); |
| 584 | } |
| 585 | |
| 586 | |
| 587 | // TODO(svenpanne): Use virtual functions instead of switch. |
| 588 | void UnaryOpStub::GenerateSmiStub(MacroAssembler* masm) { |
| 589 | switch (op_) { |
| 590 | case Token::SUB: |
| 591 | GenerateSmiStubSub(masm); |
| 592 | break; |
| 593 | case Token::BIT_NOT: |
| 594 | GenerateSmiStubBitNot(masm); |
| 595 | break; |
| 596 | default: |
| 597 | UNREACHABLE(); |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | |
| 602 | void UnaryOpStub::GenerateSmiStubSub(MacroAssembler* masm) { |
| 603 | Label non_smi, undo, slow; |
| 604 | GenerateSmiCodeSub(masm, &non_smi, &undo, &slow, |
| 605 | Label::kNear, Label::kNear, Label::kNear); |
| 606 | __ bind(&undo); |
| 607 | GenerateSmiCodeUndo(masm); |
| 608 | __ bind(&non_smi); |
| 609 | __ bind(&slow); |
| 610 | GenerateTypeTransition(masm); |
| 611 | } |
| 612 | |
| 613 | |
| 614 | void UnaryOpStub::GenerateSmiStubBitNot(MacroAssembler* masm) { |
| 615 | Label non_smi; |
| 616 | GenerateSmiCodeBitNot(masm, &non_smi); |
| 617 | __ bind(&non_smi); |
| 618 | GenerateTypeTransition(masm); |
| 619 | } |
| 620 | |
| 621 | |
| 622 | void UnaryOpStub::GenerateSmiCodeSub(MacroAssembler* masm, |
| 623 | Label* non_smi, |
| 624 | Label* undo, |
| 625 | Label* slow, |
| 626 | Label::Distance non_smi_near, |
| 627 | Label::Distance undo_near, |
| 628 | Label::Distance slow_near) { |
| 629 | // Check whether the value is a smi. |
| 630 | __ test(eax, Immediate(kSmiTagMask)); |
| 631 | __ j(not_zero, non_smi, non_smi_near); |
| 632 | |
| 633 | // We can't handle -0 with smis, so use a type transition for that case. |
| 634 | __ test(eax, Operand(eax)); |
| 635 | __ j(zero, slow, slow_near); |
| 636 | |
| 637 | // Try optimistic subtraction '0 - value', saving operand in eax for undo. |
| 638 | __ mov(edx, Operand(eax)); |
| 639 | __ Set(eax, Immediate(0)); |
| 640 | __ sub(eax, Operand(edx)); |
| 641 | __ j(overflow, undo, undo_near); |
| 642 | __ ret(0); |
| 643 | } |
| 644 | |
| 645 | |
| 646 | void UnaryOpStub::GenerateSmiCodeBitNot( |
| 647 | MacroAssembler* masm, |
| 648 | Label* non_smi, |
| 649 | Label::Distance non_smi_near) { |
| 650 | // Check whether the value is a smi. |
| 651 | __ test(eax, Immediate(kSmiTagMask)); |
| 652 | __ j(not_zero, non_smi, non_smi_near); |
| 653 | |
| 654 | // Flip bits and revert inverted smi-tag. |
| 655 | __ not_(eax); |
| 656 | __ and_(eax, ~kSmiTagMask); |
| 657 | __ ret(0); |
| 658 | } |
| 659 | |
| 660 | |
| 661 | void UnaryOpStub::GenerateSmiCodeUndo(MacroAssembler* masm) { |
| 662 | __ mov(eax, Operand(edx)); |
| 663 | } |
| 664 | |
| 665 | |
| 666 | // TODO(svenpanne): Use virtual functions instead of switch. |
| 667 | void UnaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) { |
| 668 | switch (op_) { |
| 669 | case Token::SUB: |
| 670 | GenerateHeapNumberStubSub(masm); |
| 671 | break; |
| 672 | case Token::BIT_NOT: |
| 673 | GenerateHeapNumberStubBitNot(masm); |
| 674 | break; |
| 675 | default: |
| 676 | UNREACHABLE(); |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | |
| 681 | void UnaryOpStub::GenerateHeapNumberStubSub(MacroAssembler* masm) { |
| 682 | Label non_smi, undo, slow, call_builtin; |
| 683 | GenerateSmiCodeSub(masm, &non_smi, &undo, &call_builtin, Label::kNear); |
| 684 | __ bind(&non_smi); |
| 685 | GenerateHeapNumberCodeSub(masm, &slow); |
| 686 | __ bind(&undo); |
| 687 | GenerateSmiCodeUndo(masm); |
| 688 | __ bind(&slow); |
| 689 | GenerateTypeTransition(masm); |
| 690 | __ bind(&call_builtin); |
| 691 | GenerateGenericCodeFallback(masm); |
| 692 | } |
| 693 | |
| 694 | |
| 695 | void UnaryOpStub::GenerateHeapNumberStubBitNot( |
| 696 | MacroAssembler* masm) { |
| 697 | Label non_smi, slow; |
| 698 | GenerateSmiCodeBitNot(masm, &non_smi, Label::kNear); |
| 699 | __ bind(&non_smi); |
| 700 | GenerateHeapNumberCodeBitNot(masm, &slow); |
| 701 | __ bind(&slow); |
| 702 | GenerateTypeTransition(masm); |
| 703 | } |
| 704 | |
| 705 | |
| 706 | void UnaryOpStub::GenerateHeapNumberCodeSub(MacroAssembler* masm, |
| 707 | Label* slow) { |
| 708 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 709 | __ cmp(edx, masm->isolate()->factory()->heap_number_map()); |
| 710 | __ j(not_equal, slow); |
| 711 | |
| 712 | if (mode_ == UNARY_OVERWRITE) { |
| 713 | __ xor_(FieldOperand(eax, HeapNumber::kExponentOffset), |
| 714 | Immediate(HeapNumber::kSignMask)); // Flip sign. |
| 715 | } else { |
| 716 | __ mov(edx, Operand(eax)); |
| 717 | // edx: operand |
| 718 | |
| 719 | Label slow_allocate_heapnumber, heapnumber_allocated; |
| 720 | __ AllocateHeapNumber(eax, ebx, ecx, &slow_allocate_heapnumber); |
| 721 | __ jmp(&heapnumber_allocated); |
| 722 | |
| 723 | __ bind(&slow_allocate_heapnumber); |
| 724 | __ EnterInternalFrame(); |
| 725 | __ push(edx); |
| 726 | __ CallRuntime(Runtime::kNumberAlloc, 0); |
| 727 | __ pop(edx); |
| 728 | __ LeaveInternalFrame(); |
| 729 | |
| 730 | __ bind(&heapnumber_allocated); |
| 731 | // eax: allocated 'empty' number |
| 732 | __ mov(ecx, FieldOperand(edx, HeapNumber::kExponentOffset)); |
| 733 | __ xor_(ecx, HeapNumber::kSignMask); // Flip sign. |
| 734 | __ mov(FieldOperand(eax, HeapNumber::kExponentOffset), ecx); |
| 735 | __ mov(ecx, FieldOperand(edx, HeapNumber::kMantissaOffset)); |
| 736 | __ mov(FieldOperand(eax, HeapNumber::kMantissaOffset), ecx); |
| 737 | } |
| 738 | __ ret(0); |
| 739 | } |
| 740 | |
| 741 | |
| 742 | void UnaryOpStub::GenerateHeapNumberCodeBitNot(MacroAssembler* masm, |
| 743 | Label* slow) { |
| 744 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 745 | __ cmp(edx, masm->isolate()->factory()->heap_number_map()); |
| 746 | __ j(not_equal, slow); |
| 747 | |
| 748 | // Convert the heap number in eax to an untagged integer in ecx. |
| 749 | IntegerConvert(masm, eax, CpuFeatures::IsSupported(SSE3), slow); |
| 750 | |
| 751 | // Do the bitwise operation and check if the result fits in a smi. |
| 752 | Label try_float; |
| 753 | __ not_(ecx); |
| 754 | __ cmp(ecx, 0xc0000000); |
| 755 | __ j(sign, &try_float, Label::kNear); |
| 756 | |
| 757 | // Tag the result as a smi and we're done. |
| 758 | STATIC_ASSERT(kSmiTagSize == 1); |
| 759 | __ lea(eax, Operand(ecx, times_2, kSmiTag)); |
| 760 | __ ret(0); |
| 761 | |
| 762 | // Try to store the result in a heap number. |
| 763 | __ bind(&try_float); |
| 764 | if (mode_ == UNARY_NO_OVERWRITE) { |
| 765 | Label slow_allocate_heapnumber, heapnumber_allocated; |
| 766 | __ mov(ebx, eax); |
| 767 | __ AllocateHeapNumber(eax, edx, edi, &slow_allocate_heapnumber); |
| 768 | __ jmp(&heapnumber_allocated); |
| 769 | |
| 770 | __ bind(&slow_allocate_heapnumber); |
| 771 | __ EnterInternalFrame(); |
| 772 | // Push the original HeapNumber on the stack. The integer value can't |
| 773 | // be stored since it's untagged and not in the smi range (so we can't |
| 774 | // smi-tag it). We'll recalculate the value after the GC instead. |
| 775 | __ push(ebx); |
| 776 | __ CallRuntime(Runtime::kNumberAlloc, 0); |
| 777 | // New HeapNumber is in eax. |
| 778 | __ pop(edx); |
| 779 | __ LeaveInternalFrame(); |
| 780 | // IntegerConvert uses ebx and edi as scratch registers. |
| 781 | // This conversion won't go slow-case. |
| 782 | IntegerConvert(masm, edx, CpuFeatures::IsSupported(SSE3), slow); |
| 783 | __ not_(ecx); |
| 784 | |
| 785 | __ bind(&heapnumber_allocated); |
| 786 | } |
| 787 | if (CpuFeatures::IsSupported(SSE2)) { |
| 788 | CpuFeatures::Scope use_sse2(SSE2); |
| 789 | __ cvtsi2sd(xmm0, Operand(ecx)); |
| 790 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 791 | } else { |
| 792 | __ push(ecx); |
| 793 | __ fild_s(Operand(esp, 0)); |
| 794 | __ pop(ecx); |
| 795 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 796 | } |
| 797 | __ ret(0); |
| 798 | } |
| 799 | |
| 800 | |
| 801 | // TODO(svenpanne): Use virtual functions instead of switch. |
| 802 | void UnaryOpStub::GenerateGenericStub(MacroAssembler* masm) { |
| 803 | switch (op_) { |
| 804 | case Token::SUB: |
| 805 | GenerateGenericStubSub(masm); |
| 806 | break; |
| 807 | case Token::BIT_NOT: |
| 808 | GenerateGenericStubBitNot(masm); |
| 809 | break; |
| 810 | default: |
| 811 | UNREACHABLE(); |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | |
| 816 | void UnaryOpStub::GenerateGenericStubSub(MacroAssembler* masm) { |
| 817 | Label non_smi, undo, slow; |
| 818 | GenerateSmiCodeSub(masm, &non_smi, &undo, &slow, Label::kNear); |
| 819 | __ bind(&non_smi); |
| 820 | GenerateHeapNumberCodeSub(masm, &slow); |
| 821 | __ bind(&undo); |
| 822 | GenerateSmiCodeUndo(masm); |
| 823 | __ bind(&slow); |
| 824 | GenerateGenericCodeFallback(masm); |
| 825 | } |
| 826 | |
| 827 | |
| 828 | void UnaryOpStub::GenerateGenericStubBitNot(MacroAssembler* masm) { |
| 829 | Label non_smi, slow; |
| 830 | GenerateSmiCodeBitNot(masm, &non_smi, Label::kNear); |
| 831 | __ bind(&non_smi); |
| 832 | GenerateHeapNumberCodeBitNot(masm, &slow); |
| 833 | __ bind(&slow); |
| 834 | GenerateGenericCodeFallback(masm); |
| 835 | } |
| 836 | |
| 837 | |
| 838 | void UnaryOpStub::GenerateGenericCodeFallback(MacroAssembler* masm) { |
| 839 | // Handle the slow case by jumping to the corresponding JavaScript builtin. |
| 840 | __ pop(ecx); // pop return address. |
| 841 | __ push(eax); |
| 842 | __ push(ecx); // push return address |
| 843 | switch (op_) { |
| 844 | case Token::SUB: |
| 845 | __ InvokeBuiltin(Builtins::UNARY_MINUS, JUMP_FUNCTION); |
| 846 | break; |
| 847 | case Token::BIT_NOT: |
| 848 | __ InvokeBuiltin(Builtins::BIT_NOT, JUMP_FUNCTION); |
| 849 | break; |
| 850 | default: |
| 851 | UNREACHABLE(); |
| 852 | } |
| 853 | } |
| 854 | |
| 855 | |
| 856 | Handle<Code> GetBinaryOpStub(int key, |
| 857 | BinaryOpIC::TypeInfo type_info, |
| 858 | BinaryOpIC::TypeInfo result_type_info) { |
| 859 | BinaryOpStub stub(key, type_info, result_type_info); |
| 860 | return stub.GetCode(); |
| 861 | } |
| 862 | |
| 863 | |
| 864 | void BinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 865 | __ pop(ecx); // Save return address. |
| 866 | __ push(edx); |
| 867 | __ push(eax); |
| 868 | // Left and right arguments are now on top. |
| 869 | // Push this stub's key. Although the operation and the type info are |
| 870 | // encoded into the key, the encoding is opaque, so push them too. |
| 871 | __ push(Immediate(Smi::FromInt(MinorKey()))); |
| 872 | __ push(Immediate(Smi::FromInt(op_))); |
| 873 | __ push(Immediate(Smi::FromInt(operands_type_))); |
| 874 | |
| 875 | __ push(ecx); // Push return address. |
| 876 | |
| 877 | // Patch the caller to an appropriate specialized stub and return the |
| 878 | // operation result to the caller of the stub. |
| 879 | __ TailCallExternalReference( |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 880 | ExternalReference(IC_Utility(IC::kBinaryOp_Patch), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 881 | masm->isolate()), |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 882 | 5, |
| 883 | 1); |
| 884 | } |
| 885 | |
| 886 | |
| 887 | // Prepare for a type transition runtime call when the args are already on |
| 888 | // the stack, under the return address. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 889 | void BinaryOpStub::GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 890 | __ pop(ecx); // Save return address. |
| 891 | // Left and right arguments are already on top of the stack. |
| 892 | // Push this stub's key. Although the operation and the type info are |
| 893 | // encoded into the key, the encoding is opaque, so push them too. |
| 894 | __ push(Immediate(Smi::FromInt(MinorKey()))); |
| 895 | __ push(Immediate(Smi::FromInt(op_))); |
| 896 | __ push(Immediate(Smi::FromInt(operands_type_))); |
| 897 | |
| 898 | __ push(ecx); // Push return address. |
| 899 | |
| 900 | // Patch the caller to an appropriate specialized stub and return the |
| 901 | // operation result to the caller of the stub. |
| 902 | __ TailCallExternalReference( |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 903 | ExternalReference(IC_Utility(IC::kBinaryOp_Patch), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 904 | masm->isolate()), |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 905 | 5, |
| 906 | 1); |
| 907 | } |
| 908 | |
| 909 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 910 | void BinaryOpStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 911 | switch (operands_type_) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 912 | case BinaryOpIC::UNINITIALIZED: |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 913 | GenerateTypeTransition(masm); |
| 914 | break; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 915 | case BinaryOpIC::SMI: |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 916 | GenerateSmiStub(masm); |
| 917 | break; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 918 | case BinaryOpIC::INT32: |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 919 | GenerateInt32Stub(masm); |
| 920 | break; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 921 | case BinaryOpIC::HEAP_NUMBER: |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 922 | GenerateHeapNumberStub(masm); |
| 923 | break; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 924 | case BinaryOpIC::ODDBALL: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 925 | GenerateOddballStub(masm); |
| 926 | break; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 927 | case BinaryOpIC::BOTH_STRING: |
| 928 | GenerateBothStringStub(masm); |
| 929 | break; |
| 930 | case BinaryOpIC::STRING: |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 931 | GenerateStringStub(masm); |
| 932 | break; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 933 | case BinaryOpIC::GENERIC: |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 934 | GenerateGeneric(masm); |
| 935 | break; |
| 936 | default: |
| 937 | UNREACHABLE(); |
| 938 | } |
| 939 | } |
| 940 | |
| 941 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 942 | const char* BinaryOpStub::GetName() { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 943 | if (name_ != NULL) return name_; |
| 944 | const int kMaxNameLength = 100; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 945 | name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray( |
| 946 | kMaxNameLength); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 947 | if (name_ == NULL) return "OOM"; |
| 948 | const char* op_name = Token::Name(op_); |
| 949 | const char* overwrite_name; |
| 950 | switch (mode_) { |
| 951 | case NO_OVERWRITE: overwrite_name = "Alloc"; break; |
| 952 | case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break; |
| 953 | case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break; |
| 954 | default: overwrite_name = "UnknownOverwrite"; break; |
| 955 | } |
| 956 | |
| 957 | OS::SNPrintF(Vector<char>(name_, kMaxNameLength), |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 958 | "BinaryOpStub_%s_%s_%s", |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 959 | op_name, |
| 960 | overwrite_name, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 961 | BinaryOpIC::GetName(operands_type_)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 962 | return name_; |
| 963 | } |
| 964 | |
| 965 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 966 | void BinaryOpStub::GenerateSmiCode( |
| 967 | MacroAssembler* masm, |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 968 | Label* slow, |
| 969 | SmiCodeGenerateHeapNumberResults allow_heapnumber_results) { |
| 970 | // 1. Move arguments into edx, eax except for DIV and MOD, which need the |
| 971 | // dividend in eax and edx free for the division. Use eax, ebx for those. |
| 972 | Comment load_comment(masm, "-- Load arguments"); |
| 973 | Register left = edx; |
| 974 | Register right = eax; |
| 975 | if (op_ == Token::DIV || op_ == Token::MOD) { |
| 976 | left = eax; |
| 977 | right = ebx; |
| 978 | __ mov(ebx, eax); |
| 979 | __ mov(eax, edx); |
| 980 | } |
| 981 | |
| 982 | |
| 983 | // 2. Prepare the smi check of both operands by oring them together. |
| 984 | Comment smi_check_comment(masm, "-- Smi check arguments"); |
| 985 | Label not_smis; |
| 986 | Register combined = ecx; |
| 987 | ASSERT(!left.is(combined) && !right.is(combined)); |
| 988 | switch (op_) { |
| 989 | case Token::BIT_OR: |
| 990 | // Perform the operation into eax and smi check the result. Preserve |
| 991 | // eax in case the result is not a smi. |
| 992 | ASSERT(!left.is(ecx) && !right.is(ecx)); |
| 993 | __ mov(ecx, right); |
| 994 | __ or_(right, Operand(left)); // Bitwise or is commutative. |
| 995 | combined = right; |
| 996 | break; |
| 997 | |
| 998 | case Token::BIT_XOR: |
| 999 | case Token::BIT_AND: |
| 1000 | case Token::ADD: |
| 1001 | case Token::SUB: |
| 1002 | case Token::MUL: |
| 1003 | case Token::DIV: |
| 1004 | case Token::MOD: |
| 1005 | __ mov(combined, right); |
| 1006 | __ or_(combined, Operand(left)); |
| 1007 | break; |
| 1008 | |
| 1009 | case Token::SHL: |
| 1010 | case Token::SAR: |
| 1011 | case Token::SHR: |
| 1012 | // Move the right operand into ecx for the shift operation, use eax |
| 1013 | // for the smi check register. |
| 1014 | ASSERT(!left.is(ecx) && !right.is(ecx)); |
| 1015 | __ mov(ecx, right); |
| 1016 | __ or_(right, Operand(left)); |
| 1017 | combined = right; |
| 1018 | break; |
| 1019 | |
| 1020 | default: |
| 1021 | break; |
| 1022 | } |
| 1023 | |
| 1024 | // 3. Perform the smi check of the operands. |
| 1025 | STATIC_ASSERT(kSmiTag == 0); // Adjust zero check if not the case. |
| 1026 | __ test(combined, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1027 | __ j(not_zero, ¬_smis); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1028 | |
| 1029 | // 4. Operands are both smis, perform the operation leaving the result in |
| 1030 | // eax and check the result if necessary. |
| 1031 | Comment perform_smi(masm, "-- Perform smi operation"); |
| 1032 | Label use_fp_on_smis; |
| 1033 | switch (op_) { |
| 1034 | case Token::BIT_OR: |
| 1035 | // Nothing to do. |
| 1036 | break; |
| 1037 | |
| 1038 | case Token::BIT_XOR: |
| 1039 | ASSERT(right.is(eax)); |
| 1040 | __ xor_(right, Operand(left)); // Bitwise xor is commutative. |
| 1041 | break; |
| 1042 | |
| 1043 | case Token::BIT_AND: |
| 1044 | ASSERT(right.is(eax)); |
| 1045 | __ and_(right, Operand(left)); // Bitwise and is commutative. |
| 1046 | break; |
| 1047 | |
| 1048 | case Token::SHL: |
| 1049 | // Remove tags from operands (but keep sign). |
| 1050 | __ SmiUntag(left); |
| 1051 | __ SmiUntag(ecx); |
| 1052 | // Perform the operation. |
| 1053 | __ shl_cl(left); |
| 1054 | // Check that the *signed* result fits in a smi. |
| 1055 | __ cmp(left, 0xc0000000); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1056 | __ j(sign, &use_fp_on_smis); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1057 | // Tag the result and store it in register eax. |
| 1058 | __ SmiTag(left); |
| 1059 | __ mov(eax, left); |
| 1060 | break; |
| 1061 | |
| 1062 | case Token::SAR: |
| 1063 | // Remove tags from operands (but keep sign). |
| 1064 | __ SmiUntag(left); |
| 1065 | __ SmiUntag(ecx); |
| 1066 | // Perform the operation. |
| 1067 | __ sar_cl(left); |
| 1068 | // Tag the result and store it in register eax. |
| 1069 | __ SmiTag(left); |
| 1070 | __ mov(eax, left); |
| 1071 | break; |
| 1072 | |
| 1073 | case Token::SHR: |
| 1074 | // Remove tags from operands (but keep sign). |
| 1075 | __ SmiUntag(left); |
| 1076 | __ SmiUntag(ecx); |
| 1077 | // Perform the operation. |
| 1078 | __ shr_cl(left); |
| 1079 | // Check that the *unsigned* result fits in a smi. |
| 1080 | // Neither of the two high-order bits can be set: |
| 1081 | // - 0x80000000: high bit would be lost when smi tagging. |
| 1082 | // - 0x40000000: this number would convert to negative when |
| 1083 | // Smi tagging these two cases can only happen with shifts |
| 1084 | // by 0 or 1 when handed a valid smi. |
| 1085 | __ test(left, Immediate(0xc0000000)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1086 | __ j(not_zero, &use_fp_on_smis); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1087 | // Tag the result and store it in register eax. |
| 1088 | __ SmiTag(left); |
| 1089 | __ mov(eax, left); |
| 1090 | break; |
| 1091 | |
| 1092 | case Token::ADD: |
| 1093 | ASSERT(right.is(eax)); |
| 1094 | __ add(right, Operand(left)); // Addition is commutative. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1095 | __ j(overflow, &use_fp_on_smis); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1096 | break; |
| 1097 | |
| 1098 | case Token::SUB: |
| 1099 | __ sub(left, Operand(right)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1100 | __ j(overflow, &use_fp_on_smis); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1101 | __ mov(eax, left); |
| 1102 | break; |
| 1103 | |
| 1104 | case Token::MUL: |
| 1105 | // If the smi tag is 0 we can just leave the tag on one operand. |
| 1106 | STATIC_ASSERT(kSmiTag == 0); // Adjust code below if not the case. |
| 1107 | // We can't revert the multiplication if the result is not a smi |
| 1108 | // so save the right operand. |
| 1109 | __ mov(ebx, right); |
| 1110 | // Remove tag from one of the operands (but keep sign). |
| 1111 | __ SmiUntag(right); |
| 1112 | // Do multiplication. |
| 1113 | __ imul(right, Operand(left)); // Multiplication is commutative. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1114 | __ j(overflow, &use_fp_on_smis); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1115 | // Check for negative zero result. Use combined = left | right. |
| 1116 | __ NegativeZeroTest(right, combined, &use_fp_on_smis); |
| 1117 | break; |
| 1118 | |
| 1119 | case Token::DIV: |
| 1120 | // We can't revert the division if the result is not a smi so |
| 1121 | // save the left operand. |
| 1122 | __ mov(edi, left); |
| 1123 | // Check for 0 divisor. |
| 1124 | __ test(right, Operand(right)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1125 | __ j(zero, &use_fp_on_smis); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1126 | // Sign extend left into edx:eax. |
| 1127 | ASSERT(left.is(eax)); |
| 1128 | __ cdq(); |
| 1129 | // Divide edx:eax by right. |
| 1130 | __ idiv(right); |
| 1131 | // Check for the corner case of dividing the most negative smi by |
| 1132 | // -1. We cannot use the overflow flag, since it is not set by idiv |
| 1133 | // instruction. |
| 1134 | STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| 1135 | __ cmp(eax, 0x40000000); |
| 1136 | __ j(equal, &use_fp_on_smis); |
| 1137 | // Check for negative zero result. Use combined = left | right. |
| 1138 | __ NegativeZeroTest(eax, combined, &use_fp_on_smis); |
| 1139 | // Check that the remainder is zero. |
| 1140 | __ test(edx, Operand(edx)); |
| 1141 | __ j(not_zero, &use_fp_on_smis); |
| 1142 | // Tag the result and store it in register eax. |
| 1143 | __ SmiTag(eax); |
| 1144 | break; |
| 1145 | |
| 1146 | case Token::MOD: |
| 1147 | // Check for 0 divisor. |
| 1148 | __ test(right, Operand(right)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1149 | __ j(zero, ¬_smis); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1150 | |
| 1151 | // Sign extend left into edx:eax. |
| 1152 | ASSERT(left.is(eax)); |
| 1153 | __ cdq(); |
| 1154 | // Divide edx:eax by right. |
| 1155 | __ idiv(right); |
| 1156 | // Check for negative zero result. Use combined = left | right. |
| 1157 | __ NegativeZeroTest(edx, combined, slow); |
| 1158 | // Move remainder to register eax. |
| 1159 | __ mov(eax, edx); |
| 1160 | break; |
| 1161 | |
| 1162 | default: |
| 1163 | UNREACHABLE(); |
| 1164 | } |
| 1165 | |
| 1166 | // 5. Emit return of result in eax. Some operations have registers pushed. |
| 1167 | switch (op_) { |
| 1168 | case Token::ADD: |
| 1169 | case Token::SUB: |
| 1170 | case Token::MUL: |
| 1171 | case Token::DIV: |
| 1172 | __ ret(0); |
| 1173 | break; |
| 1174 | case Token::MOD: |
| 1175 | case Token::BIT_OR: |
| 1176 | case Token::BIT_AND: |
| 1177 | case Token::BIT_XOR: |
| 1178 | case Token::SAR: |
| 1179 | case Token::SHL: |
| 1180 | case Token::SHR: |
| 1181 | __ ret(2 * kPointerSize); |
| 1182 | break; |
| 1183 | default: |
| 1184 | UNREACHABLE(); |
| 1185 | } |
| 1186 | |
| 1187 | // 6. For some operations emit inline code to perform floating point |
| 1188 | // operations on known smis (e.g., if the result of the operation |
| 1189 | // overflowed the smi range). |
| 1190 | if (allow_heapnumber_results == NO_HEAPNUMBER_RESULTS) { |
| 1191 | __ bind(&use_fp_on_smis); |
| 1192 | switch (op_) { |
| 1193 | // Undo the effects of some operations, and some register moves. |
| 1194 | case Token::SHL: |
| 1195 | // The arguments are saved on the stack, and only used from there. |
| 1196 | break; |
| 1197 | case Token::ADD: |
| 1198 | // Revert right = right + left. |
| 1199 | __ sub(right, Operand(left)); |
| 1200 | break; |
| 1201 | case Token::SUB: |
| 1202 | // Revert left = left - right. |
| 1203 | __ add(left, Operand(right)); |
| 1204 | break; |
| 1205 | case Token::MUL: |
| 1206 | // Right was clobbered but a copy is in ebx. |
| 1207 | __ mov(right, ebx); |
| 1208 | break; |
| 1209 | case Token::DIV: |
| 1210 | // Left was clobbered but a copy is in edi. Right is in ebx for |
| 1211 | // division. They should be in eax, ebx for jump to not_smi. |
| 1212 | __ mov(eax, edi); |
| 1213 | break; |
| 1214 | default: |
| 1215 | // No other operators jump to use_fp_on_smis. |
| 1216 | break; |
| 1217 | } |
| 1218 | __ jmp(¬_smis); |
| 1219 | } else { |
| 1220 | ASSERT(allow_heapnumber_results == ALLOW_HEAPNUMBER_RESULTS); |
| 1221 | switch (op_) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1222 | case Token::SHL: |
| 1223 | case Token::SHR: { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1224 | Comment perform_float(masm, "-- Perform float operation on smis"); |
| 1225 | __ bind(&use_fp_on_smis); |
| 1226 | // Result we want is in left == edx, so we can put the allocated heap |
| 1227 | // number in eax. |
| 1228 | __ AllocateHeapNumber(eax, ecx, ebx, slow); |
| 1229 | // Store the result in the HeapNumber and return. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1230 | // It's OK to overwrite the arguments on the stack because we |
| 1231 | // are about to return. |
| 1232 | if (op_ == Token::SHR) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1233 | __ mov(Operand(esp, 1 * kPointerSize), left); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1234 | __ mov(Operand(esp, 2 * kPointerSize), Immediate(0)); |
| 1235 | __ fild_d(Operand(esp, 1 * kPointerSize)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1236 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1237 | } else { |
| 1238 | ASSERT_EQ(Token::SHL, op_); |
| 1239 | if (CpuFeatures::IsSupported(SSE2)) { |
| 1240 | CpuFeatures::Scope use_sse2(SSE2); |
| 1241 | __ cvtsi2sd(xmm0, Operand(left)); |
| 1242 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 1243 | } else { |
| 1244 | __ mov(Operand(esp, 1 * kPointerSize), left); |
| 1245 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 1246 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 1247 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1248 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1249 | __ ret(2 * kPointerSize); |
| 1250 | break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1251 | } |
| 1252 | |
| 1253 | case Token::ADD: |
| 1254 | case Token::SUB: |
| 1255 | case Token::MUL: |
| 1256 | case Token::DIV: { |
| 1257 | Comment perform_float(masm, "-- Perform float operation on smis"); |
| 1258 | __ bind(&use_fp_on_smis); |
| 1259 | // Restore arguments to edx, eax. |
| 1260 | switch (op_) { |
| 1261 | case Token::ADD: |
| 1262 | // Revert right = right + left. |
| 1263 | __ sub(right, Operand(left)); |
| 1264 | break; |
| 1265 | case Token::SUB: |
| 1266 | // Revert left = left - right. |
| 1267 | __ add(left, Operand(right)); |
| 1268 | break; |
| 1269 | case Token::MUL: |
| 1270 | // Right was clobbered but a copy is in ebx. |
| 1271 | __ mov(right, ebx); |
| 1272 | break; |
| 1273 | case Token::DIV: |
| 1274 | // Left was clobbered but a copy is in edi. Right is in ebx for |
| 1275 | // division. |
| 1276 | __ mov(edx, edi); |
| 1277 | __ mov(eax, right); |
| 1278 | break; |
| 1279 | default: UNREACHABLE(); |
| 1280 | break; |
| 1281 | } |
| 1282 | __ AllocateHeapNumber(ecx, ebx, no_reg, slow); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1283 | if (CpuFeatures::IsSupported(SSE2)) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1284 | CpuFeatures::Scope use_sse2(SSE2); |
| 1285 | FloatingPointHelper::LoadSSE2Smis(masm, ebx); |
| 1286 | switch (op_) { |
| 1287 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 1288 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 1289 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 1290 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 1291 | default: UNREACHABLE(); |
| 1292 | } |
| 1293 | __ movdbl(FieldOperand(ecx, HeapNumber::kValueOffset), xmm0); |
| 1294 | } else { // SSE2 not available, use FPU. |
| 1295 | FloatingPointHelper::LoadFloatSmis(masm, ebx); |
| 1296 | switch (op_) { |
| 1297 | case Token::ADD: __ faddp(1); break; |
| 1298 | case Token::SUB: __ fsubp(1); break; |
| 1299 | case Token::MUL: __ fmulp(1); break; |
| 1300 | case Token::DIV: __ fdivp(1); break; |
| 1301 | default: UNREACHABLE(); |
| 1302 | } |
| 1303 | __ fstp_d(FieldOperand(ecx, HeapNumber::kValueOffset)); |
| 1304 | } |
| 1305 | __ mov(eax, ecx); |
| 1306 | __ ret(0); |
| 1307 | break; |
| 1308 | } |
| 1309 | |
| 1310 | default: |
| 1311 | break; |
| 1312 | } |
| 1313 | } |
| 1314 | |
| 1315 | // 7. Non-smi operands, fall out to the non-smi code with the operands in |
| 1316 | // edx and eax. |
| 1317 | Comment done_comment(masm, "-- Enter non-smi code"); |
| 1318 | __ bind(¬_smis); |
| 1319 | switch (op_) { |
| 1320 | case Token::BIT_OR: |
| 1321 | case Token::SHL: |
| 1322 | case Token::SAR: |
| 1323 | case Token::SHR: |
| 1324 | // Right operand is saved in ecx and eax was destroyed by the smi |
| 1325 | // check. |
| 1326 | __ mov(eax, ecx); |
| 1327 | break; |
| 1328 | |
| 1329 | case Token::DIV: |
| 1330 | case Token::MOD: |
| 1331 | // Operands are in eax, ebx at this point. |
| 1332 | __ mov(edx, eax); |
| 1333 | __ mov(eax, ebx); |
| 1334 | break; |
| 1335 | |
| 1336 | default: |
| 1337 | break; |
| 1338 | } |
| 1339 | } |
| 1340 | |
| 1341 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1342 | void BinaryOpStub::GenerateSmiStub(MacroAssembler* masm) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1343 | Label call_runtime; |
| 1344 | |
| 1345 | switch (op_) { |
| 1346 | case Token::ADD: |
| 1347 | case Token::SUB: |
| 1348 | case Token::MUL: |
| 1349 | case Token::DIV: |
| 1350 | break; |
| 1351 | case Token::MOD: |
| 1352 | case Token::BIT_OR: |
| 1353 | case Token::BIT_AND: |
| 1354 | case Token::BIT_XOR: |
| 1355 | case Token::SAR: |
| 1356 | case Token::SHL: |
| 1357 | case Token::SHR: |
| 1358 | GenerateRegisterArgsPush(masm); |
| 1359 | break; |
| 1360 | default: |
| 1361 | UNREACHABLE(); |
| 1362 | } |
| 1363 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1364 | if (result_type_ == BinaryOpIC::UNINITIALIZED || |
| 1365 | result_type_ == BinaryOpIC::SMI) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1366 | GenerateSmiCode(masm, &call_runtime, NO_HEAPNUMBER_RESULTS); |
| 1367 | } else { |
| 1368 | GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS); |
| 1369 | } |
| 1370 | __ bind(&call_runtime); |
| 1371 | switch (op_) { |
| 1372 | case Token::ADD: |
| 1373 | case Token::SUB: |
| 1374 | case Token::MUL: |
| 1375 | case Token::DIV: |
| 1376 | GenerateTypeTransition(masm); |
| 1377 | break; |
| 1378 | case Token::MOD: |
| 1379 | case Token::BIT_OR: |
| 1380 | case Token::BIT_AND: |
| 1381 | case Token::BIT_XOR: |
| 1382 | case Token::SAR: |
| 1383 | case Token::SHL: |
| 1384 | case Token::SHR: |
| 1385 | GenerateTypeTransitionWithSavedArgs(masm); |
| 1386 | break; |
| 1387 | default: |
| 1388 | UNREACHABLE(); |
| 1389 | } |
| 1390 | } |
| 1391 | |
| 1392 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1393 | void BinaryOpStub::GenerateStringStub(MacroAssembler* masm) { |
| 1394 | ASSERT(operands_type_ == BinaryOpIC::STRING); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1395 | ASSERT(op_ == Token::ADD); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1396 | // Try to add arguments as strings, otherwise, transition to the generic |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1397 | // BinaryOpIC type. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1398 | GenerateAddStrings(masm); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1399 | GenerateTypeTransition(masm); |
| 1400 | } |
| 1401 | |
| 1402 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1403 | void BinaryOpStub::GenerateBothStringStub(MacroAssembler* masm) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1404 | Label call_runtime; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1405 | ASSERT(operands_type_ == BinaryOpIC::BOTH_STRING); |
| 1406 | ASSERT(op_ == Token::ADD); |
| 1407 | // If both arguments are strings, call the string add stub. |
| 1408 | // Otherwise, do a transition. |
| 1409 | |
| 1410 | // Registers containing left and right operands respectively. |
| 1411 | Register left = edx; |
| 1412 | Register right = eax; |
| 1413 | |
| 1414 | // Test if left operand is a string. |
| 1415 | __ test(left, Immediate(kSmiTagMask)); |
| 1416 | __ j(zero, &call_runtime); |
| 1417 | __ CmpObjectType(left, FIRST_NONSTRING_TYPE, ecx); |
| 1418 | __ j(above_equal, &call_runtime); |
| 1419 | |
| 1420 | // Test if right operand is a string. |
| 1421 | __ test(right, Immediate(kSmiTagMask)); |
| 1422 | __ j(zero, &call_runtime); |
| 1423 | __ CmpObjectType(right, FIRST_NONSTRING_TYPE, ecx); |
| 1424 | __ j(above_equal, &call_runtime); |
| 1425 | |
| 1426 | StringAddStub string_add_stub(NO_STRING_CHECK_IN_STUB); |
| 1427 | GenerateRegisterArgsPush(masm); |
| 1428 | __ TailCallStub(&string_add_stub); |
| 1429 | |
| 1430 | __ bind(&call_runtime); |
| 1431 | GenerateTypeTransition(masm); |
| 1432 | } |
| 1433 | |
| 1434 | |
| 1435 | void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) { |
| 1436 | Label call_runtime; |
| 1437 | ASSERT(operands_type_ == BinaryOpIC::INT32); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1438 | |
| 1439 | // Floating point case. |
| 1440 | switch (op_) { |
| 1441 | case Token::ADD: |
| 1442 | case Token::SUB: |
| 1443 | case Token::MUL: |
| 1444 | case Token::DIV: { |
| 1445 | Label not_floats; |
| 1446 | Label not_int32; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1447 | if (CpuFeatures::IsSupported(SSE2)) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1448 | CpuFeatures::Scope use_sse2(SSE2); |
| 1449 | FloatingPointHelper::LoadSSE2Operands(masm, ¬_floats); |
| 1450 | FloatingPointHelper::CheckSSE2OperandsAreInt32(masm, ¬_int32, ecx); |
| 1451 | switch (op_) { |
| 1452 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 1453 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 1454 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 1455 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 1456 | default: UNREACHABLE(); |
| 1457 | } |
| 1458 | // Check result type if it is currently Int32. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1459 | if (result_type_ <= BinaryOpIC::INT32) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1460 | __ cvttsd2si(ecx, Operand(xmm0)); |
| 1461 | __ cvtsi2sd(xmm2, Operand(ecx)); |
| 1462 | __ ucomisd(xmm0, xmm2); |
| 1463 | __ j(not_zero, ¬_int32); |
| 1464 | __ j(carry, ¬_int32); |
| 1465 | } |
| 1466 | GenerateHeapResultAllocation(masm, &call_runtime); |
| 1467 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 1468 | __ ret(0); |
| 1469 | } else { // SSE2 not available, use FPU. |
| 1470 | FloatingPointHelper::CheckFloatOperands(masm, ¬_floats, ebx); |
| 1471 | FloatingPointHelper::LoadFloatOperands( |
| 1472 | masm, |
| 1473 | ecx, |
| 1474 | FloatingPointHelper::ARGS_IN_REGISTERS); |
| 1475 | FloatingPointHelper::CheckFloatOperandsAreInt32(masm, ¬_int32); |
| 1476 | switch (op_) { |
| 1477 | case Token::ADD: __ faddp(1); break; |
| 1478 | case Token::SUB: __ fsubp(1); break; |
| 1479 | case Token::MUL: __ fmulp(1); break; |
| 1480 | case Token::DIV: __ fdivp(1); break; |
| 1481 | default: UNREACHABLE(); |
| 1482 | } |
| 1483 | Label after_alloc_failure; |
| 1484 | GenerateHeapResultAllocation(masm, &after_alloc_failure); |
| 1485 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 1486 | __ ret(0); |
| 1487 | __ bind(&after_alloc_failure); |
| 1488 | __ ffree(); |
| 1489 | __ jmp(&call_runtime); |
| 1490 | } |
| 1491 | |
| 1492 | __ bind(¬_floats); |
| 1493 | __ bind(¬_int32); |
| 1494 | GenerateTypeTransition(masm); |
| 1495 | break; |
| 1496 | } |
| 1497 | |
| 1498 | case Token::MOD: { |
| 1499 | // For MOD we go directly to runtime in the non-smi case. |
| 1500 | break; |
| 1501 | } |
| 1502 | case Token::BIT_OR: |
| 1503 | case Token::BIT_AND: |
| 1504 | case Token::BIT_XOR: |
| 1505 | case Token::SAR: |
| 1506 | case Token::SHL: |
| 1507 | case Token::SHR: { |
| 1508 | GenerateRegisterArgsPush(masm); |
| 1509 | Label not_floats; |
| 1510 | Label not_int32; |
| 1511 | Label non_smi_result; |
| 1512 | /* { |
| 1513 | CpuFeatures::Scope use_sse2(SSE2); |
| 1514 | FloatingPointHelper::LoadSSE2Operands(masm, ¬_floats); |
| 1515 | FloatingPointHelper::CheckSSE2OperandsAreInt32(masm, ¬_int32, ecx); |
| 1516 | }*/ |
| 1517 | FloatingPointHelper::LoadUnknownsAsIntegers(masm, |
| 1518 | use_sse3_, |
| 1519 | ¬_floats); |
| 1520 | FloatingPointHelper::CheckLoadedIntegersWereInt32(masm, use_sse3_, |
| 1521 | ¬_int32); |
| 1522 | switch (op_) { |
| 1523 | case Token::BIT_OR: __ or_(eax, Operand(ecx)); break; |
| 1524 | case Token::BIT_AND: __ and_(eax, Operand(ecx)); break; |
| 1525 | case Token::BIT_XOR: __ xor_(eax, Operand(ecx)); break; |
| 1526 | case Token::SAR: __ sar_cl(eax); break; |
| 1527 | case Token::SHL: __ shl_cl(eax); break; |
| 1528 | case Token::SHR: __ shr_cl(eax); break; |
| 1529 | default: UNREACHABLE(); |
| 1530 | } |
| 1531 | if (op_ == Token::SHR) { |
| 1532 | // Check if result is non-negative and fits in a smi. |
| 1533 | __ test(eax, Immediate(0xc0000000)); |
| 1534 | __ j(not_zero, &call_runtime); |
| 1535 | } else { |
| 1536 | // Check if result fits in a smi. |
| 1537 | __ cmp(eax, 0xc0000000); |
| 1538 | __ j(negative, &non_smi_result); |
| 1539 | } |
| 1540 | // Tag smi result and return. |
| 1541 | __ SmiTag(eax); |
| 1542 | __ ret(2 * kPointerSize); // Drop two pushed arguments from the stack. |
| 1543 | |
| 1544 | // All ops except SHR return a signed int32 that we load in |
| 1545 | // a HeapNumber. |
| 1546 | if (op_ != Token::SHR) { |
| 1547 | __ bind(&non_smi_result); |
| 1548 | // Allocate a heap number if needed. |
| 1549 | __ mov(ebx, Operand(eax)); // ebx: result |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1550 | Label skip_allocation; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1551 | switch (mode_) { |
| 1552 | case OVERWRITE_LEFT: |
| 1553 | case OVERWRITE_RIGHT: |
| 1554 | // If the operand was an object, we skip the |
| 1555 | // allocation of a heap number. |
| 1556 | __ mov(eax, Operand(esp, mode_ == OVERWRITE_RIGHT ? |
| 1557 | 1 * kPointerSize : 2 * kPointerSize)); |
| 1558 | __ test(eax, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1559 | __ j(not_zero, &skip_allocation, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1560 | // Fall through! |
| 1561 | case NO_OVERWRITE: |
| 1562 | __ AllocateHeapNumber(eax, ecx, edx, &call_runtime); |
| 1563 | __ bind(&skip_allocation); |
| 1564 | break; |
| 1565 | default: UNREACHABLE(); |
| 1566 | } |
| 1567 | // Store the result in the HeapNumber and return. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1568 | if (CpuFeatures::IsSupported(SSE2)) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1569 | CpuFeatures::Scope use_sse2(SSE2); |
| 1570 | __ cvtsi2sd(xmm0, Operand(ebx)); |
| 1571 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 1572 | } else { |
| 1573 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
| 1574 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 1575 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 1576 | } |
| 1577 | __ ret(2 * kPointerSize); // Drop two pushed arguments from the stack. |
| 1578 | } |
| 1579 | |
| 1580 | __ bind(¬_floats); |
| 1581 | __ bind(¬_int32); |
| 1582 | GenerateTypeTransitionWithSavedArgs(masm); |
| 1583 | break; |
| 1584 | } |
| 1585 | default: UNREACHABLE(); break; |
| 1586 | } |
| 1587 | |
| 1588 | // If an allocation fails, or SHR or MOD hit a hard case, |
| 1589 | // use the runtime system to get the correct result. |
| 1590 | __ bind(&call_runtime); |
| 1591 | |
| 1592 | switch (op_) { |
| 1593 | case Token::ADD: |
| 1594 | GenerateRegisterArgsPush(masm); |
| 1595 | __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| 1596 | break; |
| 1597 | case Token::SUB: |
| 1598 | GenerateRegisterArgsPush(masm); |
| 1599 | __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| 1600 | break; |
| 1601 | case Token::MUL: |
| 1602 | GenerateRegisterArgsPush(masm); |
| 1603 | __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
| 1604 | break; |
| 1605 | case Token::DIV: |
| 1606 | GenerateRegisterArgsPush(masm); |
| 1607 | __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| 1608 | break; |
| 1609 | case Token::MOD: |
| 1610 | GenerateRegisterArgsPush(masm); |
| 1611 | __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| 1612 | break; |
| 1613 | case Token::BIT_OR: |
| 1614 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| 1615 | break; |
| 1616 | case Token::BIT_AND: |
| 1617 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| 1618 | break; |
| 1619 | case Token::BIT_XOR: |
| 1620 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| 1621 | break; |
| 1622 | case Token::SAR: |
| 1623 | __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| 1624 | break; |
| 1625 | case Token::SHL: |
| 1626 | __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| 1627 | break; |
| 1628 | case Token::SHR: |
| 1629 | __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| 1630 | break; |
| 1631 | default: |
| 1632 | UNREACHABLE(); |
| 1633 | } |
| 1634 | } |
| 1635 | |
| 1636 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1637 | void BinaryOpStub::GenerateOddballStub(MacroAssembler* masm) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1638 | if (op_ == Token::ADD) { |
| 1639 | // Handle string addition here, because it is the only operation |
| 1640 | // that does not do a ToNumber conversion on the operands. |
| 1641 | GenerateAddStrings(masm); |
| 1642 | } |
| 1643 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1644 | Factory* factory = masm->isolate()->factory(); |
| 1645 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1646 | // Convert odd ball arguments to numbers. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1647 | Label check, done; |
| 1648 | __ cmp(edx, factory->undefined_value()); |
| 1649 | __ j(not_equal, &check, Label::kNear); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1650 | if (Token::IsBitOp(op_)) { |
| 1651 | __ xor_(edx, Operand(edx)); |
| 1652 | } else { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1653 | __ mov(edx, Immediate(factory->nan_value())); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1654 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1655 | __ jmp(&done, Label::kNear); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1656 | __ bind(&check); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1657 | __ cmp(eax, factory->undefined_value()); |
| 1658 | __ j(not_equal, &done, Label::kNear); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1659 | if (Token::IsBitOp(op_)) { |
| 1660 | __ xor_(eax, Operand(eax)); |
| 1661 | } else { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1662 | __ mov(eax, Immediate(factory->nan_value())); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1663 | } |
| 1664 | __ bind(&done); |
| 1665 | |
| 1666 | GenerateHeapNumberStub(masm); |
| 1667 | } |
| 1668 | |
| 1669 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1670 | void BinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1671 | Label call_runtime; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1672 | |
| 1673 | // Floating point case. |
| 1674 | switch (op_) { |
| 1675 | case Token::ADD: |
| 1676 | case Token::SUB: |
| 1677 | case Token::MUL: |
| 1678 | case Token::DIV: { |
| 1679 | Label not_floats; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1680 | if (CpuFeatures::IsSupported(SSE2)) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1681 | CpuFeatures::Scope use_sse2(SSE2); |
| 1682 | FloatingPointHelper::LoadSSE2Operands(masm, ¬_floats); |
| 1683 | |
| 1684 | switch (op_) { |
| 1685 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 1686 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 1687 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 1688 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 1689 | default: UNREACHABLE(); |
| 1690 | } |
| 1691 | GenerateHeapResultAllocation(masm, &call_runtime); |
| 1692 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 1693 | __ ret(0); |
| 1694 | } else { // SSE2 not available, use FPU. |
| 1695 | FloatingPointHelper::CheckFloatOperands(masm, ¬_floats, ebx); |
| 1696 | FloatingPointHelper::LoadFloatOperands( |
| 1697 | masm, |
| 1698 | ecx, |
| 1699 | FloatingPointHelper::ARGS_IN_REGISTERS); |
| 1700 | switch (op_) { |
| 1701 | case Token::ADD: __ faddp(1); break; |
| 1702 | case Token::SUB: __ fsubp(1); break; |
| 1703 | case Token::MUL: __ fmulp(1); break; |
| 1704 | case Token::DIV: __ fdivp(1); break; |
| 1705 | default: UNREACHABLE(); |
| 1706 | } |
| 1707 | Label after_alloc_failure; |
| 1708 | GenerateHeapResultAllocation(masm, &after_alloc_failure); |
| 1709 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 1710 | __ ret(0); |
| 1711 | __ bind(&after_alloc_failure); |
| 1712 | __ ffree(); |
| 1713 | __ jmp(&call_runtime); |
| 1714 | } |
| 1715 | |
| 1716 | __ bind(¬_floats); |
| 1717 | GenerateTypeTransition(masm); |
| 1718 | break; |
| 1719 | } |
| 1720 | |
| 1721 | case Token::MOD: { |
| 1722 | // For MOD we go directly to runtime in the non-smi case. |
| 1723 | break; |
| 1724 | } |
| 1725 | case Token::BIT_OR: |
| 1726 | case Token::BIT_AND: |
| 1727 | case Token::BIT_XOR: |
| 1728 | case Token::SAR: |
| 1729 | case Token::SHL: |
| 1730 | case Token::SHR: { |
| 1731 | GenerateRegisterArgsPush(masm); |
| 1732 | Label not_floats; |
| 1733 | Label non_smi_result; |
| 1734 | FloatingPointHelper::LoadUnknownsAsIntegers(masm, |
| 1735 | use_sse3_, |
| 1736 | ¬_floats); |
| 1737 | switch (op_) { |
| 1738 | case Token::BIT_OR: __ or_(eax, Operand(ecx)); break; |
| 1739 | case Token::BIT_AND: __ and_(eax, Operand(ecx)); break; |
| 1740 | case Token::BIT_XOR: __ xor_(eax, Operand(ecx)); break; |
| 1741 | case Token::SAR: __ sar_cl(eax); break; |
| 1742 | case Token::SHL: __ shl_cl(eax); break; |
| 1743 | case Token::SHR: __ shr_cl(eax); break; |
| 1744 | default: UNREACHABLE(); |
| 1745 | } |
| 1746 | if (op_ == Token::SHR) { |
| 1747 | // Check if result is non-negative and fits in a smi. |
| 1748 | __ test(eax, Immediate(0xc0000000)); |
| 1749 | __ j(not_zero, &call_runtime); |
| 1750 | } else { |
| 1751 | // Check if result fits in a smi. |
| 1752 | __ cmp(eax, 0xc0000000); |
| 1753 | __ j(negative, &non_smi_result); |
| 1754 | } |
| 1755 | // Tag smi result and return. |
| 1756 | __ SmiTag(eax); |
| 1757 | __ ret(2 * kPointerSize); // Drop two pushed arguments from the stack. |
| 1758 | |
| 1759 | // All ops except SHR return a signed int32 that we load in |
| 1760 | // a HeapNumber. |
| 1761 | if (op_ != Token::SHR) { |
| 1762 | __ bind(&non_smi_result); |
| 1763 | // Allocate a heap number if needed. |
| 1764 | __ mov(ebx, Operand(eax)); // ebx: result |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1765 | Label skip_allocation; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1766 | switch (mode_) { |
| 1767 | case OVERWRITE_LEFT: |
| 1768 | case OVERWRITE_RIGHT: |
| 1769 | // If the operand was an object, we skip the |
| 1770 | // allocation of a heap number. |
| 1771 | __ mov(eax, Operand(esp, mode_ == OVERWRITE_RIGHT ? |
| 1772 | 1 * kPointerSize : 2 * kPointerSize)); |
| 1773 | __ test(eax, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1774 | __ j(not_zero, &skip_allocation, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1775 | // Fall through! |
| 1776 | case NO_OVERWRITE: |
| 1777 | __ AllocateHeapNumber(eax, ecx, edx, &call_runtime); |
| 1778 | __ bind(&skip_allocation); |
| 1779 | break; |
| 1780 | default: UNREACHABLE(); |
| 1781 | } |
| 1782 | // Store the result in the HeapNumber and return. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1783 | if (CpuFeatures::IsSupported(SSE2)) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1784 | CpuFeatures::Scope use_sse2(SSE2); |
| 1785 | __ cvtsi2sd(xmm0, Operand(ebx)); |
| 1786 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 1787 | } else { |
| 1788 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
| 1789 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 1790 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 1791 | } |
| 1792 | __ ret(2 * kPointerSize); // Drop two pushed arguments from the stack. |
| 1793 | } |
| 1794 | |
| 1795 | __ bind(¬_floats); |
| 1796 | GenerateTypeTransitionWithSavedArgs(masm); |
| 1797 | break; |
| 1798 | } |
| 1799 | default: UNREACHABLE(); break; |
| 1800 | } |
| 1801 | |
| 1802 | // If an allocation fails, or SHR or MOD hit a hard case, |
| 1803 | // use the runtime system to get the correct result. |
| 1804 | __ bind(&call_runtime); |
| 1805 | |
| 1806 | switch (op_) { |
| 1807 | case Token::ADD: |
| 1808 | GenerateRegisterArgsPush(masm); |
| 1809 | __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| 1810 | break; |
| 1811 | case Token::SUB: |
| 1812 | GenerateRegisterArgsPush(masm); |
| 1813 | __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| 1814 | break; |
| 1815 | case Token::MUL: |
| 1816 | GenerateRegisterArgsPush(masm); |
| 1817 | __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
| 1818 | break; |
| 1819 | case Token::DIV: |
| 1820 | GenerateRegisterArgsPush(masm); |
| 1821 | __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| 1822 | break; |
| 1823 | case Token::MOD: |
| 1824 | GenerateRegisterArgsPush(masm); |
| 1825 | __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| 1826 | break; |
| 1827 | case Token::BIT_OR: |
| 1828 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| 1829 | break; |
| 1830 | case Token::BIT_AND: |
| 1831 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| 1832 | break; |
| 1833 | case Token::BIT_XOR: |
| 1834 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| 1835 | break; |
| 1836 | case Token::SAR: |
| 1837 | __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| 1838 | break; |
| 1839 | case Token::SHL: |
| 1840 | __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| 1841 | break; |
| 1842 | case Token::SHR: |
| 1843 | __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| 1844 | break; |
| 1845 | default: |
| 1846 | UNREACHABLE(); |
| 1847 | } |
| 1848 | } |
| 1849 | |
| 1850 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1851 | void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1852 | Label call_runtime; |
| 1853 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1854 | Counters* counters = masm->isolate()->counters(); |
| 1855 | __ IncrementCounter(counters->generic_binary_stub_calls(), 1); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1856 | |
| 1857 | switch (op_) { |
| 1858 | case Token::ADD: |
| 1859 | case Token::SUB: |
| 1860 | case Token::MUL: |
| 1861 | case Token::DIV: |
| 1862 | break; |
| 1863 | case Token::MOD: |
| 1864 | case Token::BIT_OR: |
| 1865 | case Token::BIT_AND: |
| 1866 | case Token::BIT_XOR: |
| 1867 | case Token::SAR: |
| 1868 | case Token::SHL: |
| 1869 | case Token::SHR: |
| 1870 | GenerateRegisterArgsPush(masm); |
| 1871 | break; |
| 1872 | default: |
| 1873 | UNREACHABLE(); |
| 1874 | } |
| 1875 | |
| 1876 | GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS); |
| 1877 | |
| 1878 | // Floating point case. |
| 1879 | switch (op_) { |
| 1880 | case Token::ADD: |
| 1881 | case Token::SUB: |
| 1882 | case Token::MUL: |
| 1883 | case Token::DIV: { |
| 1884 | Label not_floats; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1885 | if (CpuFeatures::IsSupported(SSE2)) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1886 | CpuFeatures::Scope use_sse2(SSE2); |
| 1887 | FloatingPointHelper::LoadSSE2Operands(masm, ¬_floats); |
| 1888 | |
| 1889 | switch (op_) { |
| 1890 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 1891 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 1892 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 1893 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 1894 | default: UNREACHABLE(); |
| 1895 | } |
| 1896 | GenerateHeapResultAllocation(masm, &call_runtime); |
| 1897 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 1898 | __ ret(0); |
| 1899 | } else { // SSE2 not available, use FPU. |
| 1900 | FloatingPointHelper::CheckFloatOperands(masm, ¬_floats, ebx); |
| 1901 | FloatingPointHelper::LoadFloatOperands( |
| 1902 | masm, |
| 1903 | ecx, |
| 1904 | FloatingPointHelper::ARGS_IN_REGISTERS); |
| 1905 | switch (op_) { |
| 1906 | case Token::ADD: __ faddp(1); break; |
| 1907 | case Token::SUB: __ fsubp(1); break; |
| 1908 | case Token::MUL: __ fmulp(1); break; |
| 1909 | case Token::DIV: __ fdivp(1); break; |
| 1910 | default: UNREACHABLE(); |
| 1911 | } |
| 1912 | Label after_alloc_failure; |
| 1913 | GenerateHeapResultAllocation(masm, &after_alloc_failure); |
| 1914 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 1915 | __ ret(0); |
| 1916 | __ bind(&after_alloc_failure); |
| 1917 | __ ffree(); |
| 1918 | __ jmp(&call_runtime); |
| 1919 | } |
| 1920 | __ bind(¬_floats); |
| 1921 | break; |
| 1922 | } |
| 1923 | case Token::MOD: { |
| 1924 | // For MOD we go directly to runtime in the non-smi case. |
| 1925 | break; |
| 1926 | } |
| 1927 | case Token::BIT_OR: |
| 1928 | case Token::BIT_AND: |
| 1929 | case Token::BIT_XOR: |
| 1930 | case Token::SAR: |
| 1931 | case Token::SHL: |
| 1932 | case Token::SHR: { |
| 1933 | Label non_smi_result; |
| 1934 | FloatingPointHelper::LoadUnknownsAsIntegers(masm, |
| 1935 | use_sse3_, |
| 1936 | &call_runtime); |
| 1937 | switch (op_) { |
| 1938 | case Token::BIT_OR: __ or_(eax, Operand(ecx)); break; |
| 1939 | case Token::BIT_AND: __ and_(eax, Operand(ecx)); break; |
| 1940 | case Token::BIT_XOR: __ xor_(eax, Operand(ecx)); break; |
| 1941 | case Token::SAR: __ sar_cl(eax); break; |
| 1942 | case Token::SHL: __ shl_cl(eax); break; |
| 1943 | case Token::SHR: __ shr_cl(eax); break; |
| 1944 | default: UNREACHABLE(); |
| 1945 | } |
| 1946 | if (op_ == Token::SHR) { |
| 1947 | // Check if result is non-negative and fits in a smi. |
| 1948 | __ test(eax, Immediate(0xc0000000)); |
| 1949 | __ j(not_zero, &call_runtime); |
| 1950 | } else { |
| 1951 | // Check if result fits in a smi. |
| 1952 | __ cmp(eax, 0xc0000000); |
| 1953 | __ j(negative, &non_smi_result); |
| 1954 | } |
| 1955 | // Tag smi result and return. |
| 1956 | __ SmiTag(eax); |
| 1957 | __ ret(2 * kPointerSize); // Drop the arguments from the stack. |
| 1958 | |
| 1959 | // All ops except SHR return a signed int32 that we load in |
| 1960 | // a HeapNumber. |
| 1961 | if (op_ != Token::SHR) { |
| 1962 | __ bind(&non_smi_result); |
| 1963 | // Allocate a heap number if needed. |
| 1964 | __ mov(ebx, Operand(eax)); // ebx: result |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1965 | Label skip_allocation; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1966 | switch (mode_) { |
| 1967 | case OVERWRITE_LEFT: |
| 1968 | case OVERWRITE_RIGHT: |
| 1969 | // If the operand was an object, we skip the |
| 1970 | // allocation of a heap number. |
| 1971 | __ mov(eax, Operand(esp, mode_ == OVERWRITE_RIGHT ? |
| 1972 | 1 * kPointerSize : 2 * kPointerSize)); |
| 1973 | __ test(eax, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 1974 | __ j(not_zero, &skip_allocation, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1975 | // Fall through! |
| 1976 | case NO_OVERWRITE: |
| 1977 | __ AllocateHeapNumber(eax, ecx, edx, &call_runtime); |
| 1978 | __ bind(&skip_allocation); |
| 1979 | break; |
| 1980 | default: UNREACHABLE(); |
| 1981 | } |
| 1982 | // Store the result in the HeapNumber and return. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1983 | if (CpuFeatures::IsSupported(SSE2)) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1984 | CpuFeatures::Scope use_sse2(SSE2); |
| 1985 | __ cvtsi2sd(xmm0, Operand(ebx)); |
| 1986 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 1987 | } else { |
| 1988 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
| 1989 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 1990 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 1991 | } |
| 1992 | __ ret(2 * kPointerSize); |
| 1993 | } |
| 1994 | break; |
| 1995 | } |
| 1996 | default: UNREACHABLE(); break; |
| 1997 | } |
| 1998 | |
| 1999 | // If all else fails, use the runtime system to get the correct |
| 2000 | // result. |
| 2001 | __ bind(&call_runtime); |
| 2002 | switch (op_) { |
| 2003 | case Token::ADD: { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2004 | GenerateAddStrings(masm); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2005 | GenerateRegisterArgsPush(masm); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2006 | __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| 2007 | break; |
| 2008 | } |
| 2009 | case Token::SUB: |
| 2010 | GenerateRegisterArgsPush(masm); |
| 2011 | __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| 2012 | break; |
| 2013 | case Token::MUL: |
| 2014 | GenerateRegisterArgsPush(masm); |
| 2015 | __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
| 2016 | break; |
| 2017 | case Token::DIV: |
| 2018 | GenerateRegisterArgsPush(masm); |
| 2019 | __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| 2020 | break; |
| 2021 | case Token::MOD: |
| 2022 | __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| 2023 | break; |
| 2024 | case Token::BIT_OR: |
| 2025 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| 2026 | break; |
| 2027 | case Token::BIT_AND: |
| 2028 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| 2029 | break; |
| 2030 | case Token::BIT_XOR: |
| 2031 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| 2032 | break; |
| 2033 | case Token::SAR: |
| 2034 | __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| 2035 | break; |
| 2036 | case Token::SHL: |
| 2037 | __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| 2038 | break; |
| 2039 | case Token::SHR: |
| 2040 | __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| 2041 | break; |
| 2042 | default: |
| 2043 | UNREACHABLE(); |
| 2044 | } |
| 2045 | } |
| 2046 | |
| 2047 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2048 | void BinaryOpStub::GenerateAddStrings(MacroAssembler* masm) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2049 | ASSERT(op_ == Token::ADD); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2050 | Label left_not_string, call_runtime; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2051 | |
| 2052 | // Registers containing left and right operands respectively. |
| 2053 | Register left = edx; |
| 2054 | Register right = eax; |
| 2055 | |
| 2056 | // Test if left operand is a string. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2057 | __ test(left, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2058 | __ j(zero, &left_not_string, Label::kNear); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2059 | __ CmpObjectType(left, FIRST_NONSTRING_TYPE, ecx); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2060 | __ j(above_equal, &left_not_string, Label::kNear); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2061 | |
| 2062 | StringAddStub string_add_left_stub(NO_STRING_CHECK_LEFT_IN_STUB); |
| 2063 | GenerateRegisterArgsPush(masm); |
| 2064 | __ TailCallStub(&string_add_left_stub); |
| 2065 | |
| 2066 | // Left operand is not a string, test right. |
| 2067 | __ bind(&left_not_string); |
| 2068 | __ test(right, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2069 | __ j(zero, &call_runtime, Label::kNear); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2070 | __ CmpObjectType(right, FIRST_NONSTRING_TYPE, ecx); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2071 | __ j(above_equal, &call_runtime, Label::kNear); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2072 | |
| 2073 | StringAddStub string_add_right_stub(NO_STRING_CHECK_RIGHT_IN_STUB); |
| 2074 | GenerateRegisterArgsPush(masm); |
| 2075 | __ TailCallStub(&string_add_right_stub); |
| 2076 | |
| 2077 | // Neither argument is a string. |
| 2078 | __ bind(&call_runtime); |
| 2079 | } |
| 2080 | |
| 2081 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2082 | void BinaryOpStub::GenerateHeapResultAllocation( |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2083 | MacroAssembler* masm, |
| 2084 | Label* alloc_failure) { |
| 2085 | Label skip_allocation; |
| 2086 | OverwriteMode mode = mode_; |
| 2087 | switch (mode) { |
| 2088 | case OVERWRITE_LEFT: { |
| 2089 | // If the argument in edx is already an object, we skip the |
| 2090 | // allocation of a heap number. |
| 2091 | __ test(edx, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2092 | __ j(not_zero, &skip_allocation); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2093 | // Allocate a heap number for the result. Keep eax and edx intact |
| 2094 | // for the possible runtime call. |
| 2095 | __ AllocateHeapNumber(ebx, ecx, no_reg, alloc_failure); |
| 2096 | // Now edx can be overwritten losing one of the arguments as we are |
| 2097 | // now done and will not need it any more. |
| 2098 | __ mov(edx, Operand(ebx)); |
| 2099 | __ bind(&skip_allocation); |
| 2100 | // Use object in edx as a result holder |
| 2101 | __ mov(eax, Operand(edx)); |
| 2102 | break; |
| 2103 | } |
| 2104 | case OVERWRITE_RIGHT: |
| 2105 | // If the argument in eax is already an object, we skip the |
| 2106 | // allocation of a heap number. |
| 2107 | __ test(eax, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2108 | __ j(not_zero, &skip_allocation); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2109 | // Fall through! |
| 2110 | case NO_OVERWRITE: |
| 2111 | // Allocate a heap number for the result. Keep eax and edx intact |
| 2112 | // for the possible runtime call. |
| 2113 | __ AllocateHeapNumber(ebx, ecx, no_reg, alloc_failure); |
| 2114 | // Now eax can be overwritten losing one of the arguments as we are |
| 2115 | // now done and will not need it any more. |
| 2116 | __ mov(eax, ebx); |
| 2117 | __ bind(&skip_allocation); |
| 2118 | break; |
| 2119 | default: UNREACHABLE(); |
| 2120 | } |
| 2121 | } |
| 2122 | |
| 2123 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2124 | void BinaryOpStub::GenerateRegisterArgsPush(MacroAssembler* masm) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2125 | __ pop(ecx); |
| 2126 | __ push(edx); |
| 2127 | __ push(eax); |
| 2128 | __ push(ecx); |
| 2129 | } |
| 2130 | |
| 2131 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2132 | void TranscendentalCacheStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2133 | // TAGGED case: |
| 2134 | // Input: |
| 2135 | // esp[4]: tagged number input argument (should be number). |
| 2136 | // esp[0]: return address. |
| 2137 | // Output: |
| 2138 | // eax: tagged double result. |
| 2139 | // UNTAGGED case: |
| 2140 | // Input:: |
| 2141 | // esp[0]: return address. |
| 2142 | // xmm1: untagged double input argument |
| 2143 | // Output: |
| 2144 | // xmm1: untagged double result. |
| 2145 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2146 | Label runtime_call; |
| 2147 | Label runtime_call_clear_stack; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2148 | Label skip_cache; |
| 2149 | const bool tagged = (argument_type_ == TAGGED); |
| 2150 | if (tagged) { |
| 2151 | // Test that eax is a number. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2152 | Label input_not_smi; |
| 2153 | Label loaded; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2154 | __ mov(eax, Operand(esp, kPointerSize)); |
| 2155 | __ test(eax, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2156 | __ j(not_zero, &input_not_smi, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2157 | // Input is a smi. Untag and load it onto the FPU stack. |
| 2158 | // Then load the low and high words of the double into ebx, edx. |
| 2159 | STATIC_ASSERT(kSmiTagSize == 1); |
| 2160 | __ sar(eax, 1); |
| 2161 | __ sub(Operand(esp), Immediate(2 * kPointerSize)); |
| 2162 | __ mov(Operand(esp, 0), eax); |
| 2163 | __ fild_s(Operand(esp, 0)); |
| 2164 | __ fst_d(Operand(esp, 0)); |
| 2165 | __ pop(edx); |
| 2166 | __ pop(ebx); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2167 | __ jmp(&loaded, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2168 | __ bind(&input_not_smi); |
| 2169 | // Check if input is a HeapNumber. |
| 2170 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2171 | Factory* factory = masm->isolate()->factory(); |
| 2172 | __ cmp(Operand(ebx), Immediate(factory->heap_number_map())); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2173 | __ j(not_equal, &runtime_call); |
| 2174 | // Input is a HeapNumber. Push it on the FPU stack and load its |
| 2175 | // low and high words into ebx, edx. |
| 2176 | __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2177 | __ mov(edx, FieldOperand(eax, HeapNumber::kExponentOffset)); |
| 2178 | __ mov(ebx, FieldOperand(eax, HeapNumber::kMantissaOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2179 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2180 | __ bind(&loaded); |
| 2181 | } else { // UNTAGGED. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2182 | if (CpuFeatures::IsSupported(SSE4_1)) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2183 | CpuFeatures::Scope sse4_scope(SSE4_1); |
| 2184 | __ pextrd(Operand(edx), xmm1, 0x1); // copy xmm1[63..32] to edx. |
| 2185 | } else { |
| 2186 | __ pshufd(xmm0, xmm1, 0x1); |
| 2187 | __ movd(Operand(edx), xmm0); |
| 2188 | } |
| 2189 | __ movd(Operand(ebx), xmm1); |
| 2190 | } |
| 2191 | |
| 2192 | // ST[0] or xmm1 == double value |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2193 | // ebx = low 32 bits of double value |
| 2194 | // edx = high 32 bits of double value |
| 2195 | // Compute hash (the shifts are arithmetic): |
| 2196 | // h = (low ^ high); h ^= h >> 16; h ^= h >> 8; h = h & (cacheSize - 1); |
| 2197 | __ mov(ecx, ebx); |
| 2198 | __ xor_(ecx, Operand(edx)); |
| 2199 | __ mov(eax, ecx); |
| 2200 | __ sar(eax, 16); |
| 2201 | __ xor_(ecx, Operand(eax)); |
| 2202 | __ mov(eax, ecx); |
| 2203 | __ sar(eax, 8); |
| 2204 | __ xor_(ecx, Operand(eax)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2205 | ASSERT(IsPowerOf2(TranscendentalCache::SubCache::kCacheSize)); |
| 2206 | __ and_(Operand(ecx), |
| 2207 | Immediate(TranscendentalCache::SubCache::kCacheSize - 1)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2208 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2209 | // ST[0] or xmm1 == double value. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2210 | // ebx = low 32 bits of double value. |
| 2211 | // edx = high 32 bits of double value. |
| 2212 | // ecx = TranscendentalCache::hash(double value). |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2213 | ExternalReference cache_array = |
| 2214 | ExternalReference::transcendental_cache_array_address(masm->isolate()); |
| 2215 | __ mov(eax, Immediate(cache_array)); |
| 2216 | int cache_array_index = |
| 2217 | type_ * sizeof(masm->isolate()->transcendental_cache()->caches_[0]); |
| 2218 | __ mov(eax, Operand(eax, cache_array_index)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2219 | // Eax points to the cache for the type type_. |
| 2220 | // If NULL, the cache hasn't been initialized yet, so go through runtime. |
| 2221 | __ test(eax, Operand(eax)); |
| 2222 | __ j(zero, &runtime_call_clear_stack); |
| 2223 | #ifdef DEBUG |
| 2224 | // Check that the layout of cache elements match expectations. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2225 | { TranscendentalCache::SubCache::Element test_elem[2]; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2226 | char* elem_start = reinterpret_cast<char*>(&test_elem[0]); |
| 2227 | char* elem2_start = reinterpret_cast<char*>(&test_elem[1]); |
| 2228 | char* elem_in0 = reinterpret_cast<char*>(&(test_elem[0].in[0])); |
| 2229 | char* elem_in1 = reinterpret_cast<char*>(&(test_elem[0].in[1])); |
| 2230 | char* elem_out = reinterpret_cast<char*>(&(test_elem[0].output)); |
| 2231 | CHECK_EQ(12, elem2_start - elem_start); // Two uint_32's and a pointer. |
| 2232 | CHECK_EQ(0, elem_in0 - elem_start); |
| 2233 | CHECK_EQ(kIntSize, elem_in1 - elem_start); |
| 2234 | CHECK_EQ(2 * kIntSize, elem_out - elem_start); |
| 2235 | } |
| 2236 | #endif |
| 2237 | // Find the address of the ecx'th entry in the cache, i.e., &eax[ecx*12]. |
| 2238 | __ lea(ecx, Operand(ecx, ecx, times_2, 0)); |
| 2239 | __ lea(ecx, Operand(eax, ecx, times_4, 0)); |
| 2240 | // Check if cache matches: Double value is stored in uint32_t[2] array. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2241 | Label cache_miss; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2242 | __ cmp(ebx, Operand(ecx, 0)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2243 | __ j(not_equal, &cache_miss, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2244 | __ cmp(edx, Operand(ecx, kIntSize)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2245 | __ j(not_equal, &cache_miss, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2246 | // Cache hit! |
| 2247 | __ mov(eax, Operand(ecx, 2 * kIntSize)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2248 | if (tagged) { |
| 2249 | __ fstp(0); |
| 2250 | __ ret(kPointerSize); |
| 2251 | } else { // UNTAGGED. |
| 2252 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2253 | __ Ret(); |
| 2254 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2255 | |
| 2256 | __ bind(&cache_miss); |
| 2257 | // Update cache with new value. |
| 2258 | // We are short on registers, so use no_reg as scratch. |
| 2259 | // This gives slightly larger code. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2260 | if (tagged) { |
| 2261 | __ AllocateHeapNumber(eax, edi, no_reg, &runtime_call_clear_stack); |
| 2262 | } else { // UNTAGGED. |
| 2263 | __ AllocateHeapNumber(eax, edi, no_reg, &skip_cache); |
| 2264 | __ sub(Operand(esp), Immediate(kDoubleSize)); |
| 2265 | __ movdbl(Operand(esp, 0), xmm1); |
| 2266 | __ fld_d(Operand(esp, 0)); |
| 2267 | __ add(Operand(esp), Immediate(kDoubleSize)); |
| 2268 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2269 | GenerateOperation(masm); |
| 2270 | __ mov(Operand(ecx, 0), ebx); |
| 2271 | __ mov(Operand(ecx, kIntSize), edx); |
| 2272 | __ mov(Operand(ecx, 2 * kIntSize), eax); |
| 2273 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2274 | if (tagged) { |
| 2275 | __ ret(kPointerSize); |
| 2276 | } else { // UNTAGGED. |
| 2277 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2278 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2279 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2280 | // Skip cache and return answer directly, only in untagged case. |
| 2281 | __ bind(&skip_cache); |
| 2282 | __ sub(Operand(esp), Immediate(kDoubleSize)); |
| 2283 | __ movdbl(Operand(esp, 0), xmm1); |
| 2284 | __ fld_d(Operand(esp, 0)); |
| 2285 | GenerateOperation(masm); |
| 2286 | __ fstp_d(Operand(esp, 0)); |
| 2287 | __ movdbl(xmm1, Operand(esp, 0)); |
| 2288 | __ add(Operand(esp), Immediate(kDoubleSize)); |
| 2289 | // We return the value in xmm1 without adding it to the cache, but |
| 2290 | // we cause a scavenging GC so that future allocations will succeed. |
| 2291 | __ EnterInternalFrame(); |
| 2292 | // Allocate an unused object bigger than a HeapNumber. |
| 2293 | __ push(Immediate(Smi::FromInt(2 * kDoubleSize))); |
| 2294 | __ CallRuntimeSaveDoubles(Runtime::kAllocateInNewSpace); |
| 2295 | __ LeaveInternalFrame(); |
| 2296 | __ Ret(); |
| 2297 | } |
| 2298 | |
| 2299 | // Call runtime, doing whatever allocation and cleanup is necessary. |
| 2300 | if (tagged) { |
| 2301 | __ bind(&runtime_call_clear_stack); |
| 2302 | __ fstp(0); |
| 2303 | __ bind(&runtime_call); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2304 | ExternalReference runtime = |
| 2305 | ExternalReference(RuntimeFunction(), masm->isolate()); |
| 2306 | __ TailCallExternalReference(runtime, 1, 1); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2307 | } else { // UNTAGGED. |
| 2308 | __ bind(&runtime_call_clear_stack); |
| 2309 | __ bind(&runtime_call); |
| 2310 | __ AllocateHeapNumber(eax, edi, no_reg, &skip_cache); |
| 2311 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm1); |
| 2312 | __ EnterInternalFrame(); |
| 2313 | __ push(eax); |
| 2314 | __ CallRuntime(RuntimeFunction(), 1); |
| 2315 | __ LeaveInternalFrame(); |
| 2316 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2317 | __ Ret(); |
| 2318 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2319 | } |
| 2320 | |
| 2321 | |
| 2322 | Runtime::FunctionId TranscendentalCacheStub::RuntimeFunction() { |
| 2323 | switch (type_) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2324 | case TranscendentalCache::SIN: return Runtime::kMath_sin; |
| 2325 | case TranscendentalCache::COS: return Runtime::kMath_cos; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2326 | case TranscendentalCache::LOG: return Runtime::kMath_log; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2327 | default: |
| 2328 | UNIMPLEMENTED(); |
| 2329 | return Runtime::kAbort; |
| 2330 | } |
| 2331 | } |
| 2332 | |
| 2333 | |
| 2334 | void TranscendentalCacheStub::GenerateOperation(MacroAssembler* masm) { |
| 2335 | // Only free register is edi. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2336 | // Input value is on FP stack, and also in ebx/edx. |
| 2337 | // Input value is possibly in xmm1. |
| 2338 | // Address of result (a newly allocated HeapNumber) may be in eax. |
| 2339 | if (type_ == TranscendentalCache::SIN || type_ == TranscendentalCache::COS) { |
| 2340 | // Both fsin and fcos require arguments in the range +/-2^63 and |
| 2341 | // return NaN for infinities and NaN. They can share all code except |
| 2342 | // the actual fsin/fcos operation. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2343 | Label in_range, done; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2344 | // If argument is outside the range -2^63..2^63, fsin/cos doesn't |
| 2345 | // work. We must reduce it to the appropriate range. |
| 2346 | __ mov(edi, edx); |
| 2347 | __ and_(Operand(edi), Immediate(0x7ff00000)); // Exponent only. |
| 2348 | int supported_exponent_limit = |
| 2349 | (63 + HeapNumber::kExponentBias) << HeapNumber::kExponentShift; |
| 2350 | __ cmp(Operand(edi), Immediate(supported_exponent_limit)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2351 | __ j(below, &in_range, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2352 | // Check for infinity and NaN. Both return NaN for sin. |
| 2353 | __ cmp(Operand(edi), Immediate(0x7ff00000)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2354 | Label non_nan_result; |
| 2355 | __ j(not_equal, &non_nan_result, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2356 | // Input is +/-Infinity or NaN. Result is NaN. |
| 2357 | __ fstp(0); |
| 2358 | // NaN is represented by 0x7ff8000000000000. |
| 2359 | __ push(Immediate(0x7ff80000)); |
| 2360 | __ push(Immediate(0)); |
| 2361 | __ fld_d(Operand(esp, 0)); |
| 2362 | __ add(Operand(esp), Immediate(2 * kPointerSize)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2363 | __ jmp(&done, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2364 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2365 | __ bind(&non_nan_result); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2366 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2367 | // Use fpmod to restrict argument to the range +/-2*PI. |
| 2368 | __ mov(edi, eax); // Save eax before using fnstsw_ax. |
| 2369 | __ fldpi(); |
| 2370 | __ fadd(0); |
| 2371 | __ fld(1); |
| 2372 | // FPU Stack: input, 2*pi, input. |
| 2373 | { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2374 | Label no_exceptions; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2375 | __ fwait(); |
| 2376 | __ fnstsw_ax(); |
| 2377 | // Clear if Illegal Operand or Zero Division exceptions are set. |
| 2378 | __ test(Operand(eax), Immediate(5)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2379 | __ j(zero, &no_exceptions, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2380 | __ fnclex(); |
| 2381 | __ bind(&no_exceptions); |
| 2382 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2383 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2384 | // Compute st(0) % st(1) |
| 2385 | { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2386 | Label partial_remainder_loop; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2387 | __ bind(&partial_remainder_loop); |
| 2388 | __ fprem1(); |
| 2389 | __ fwait(); |
| 2390 | __ fnstsw_ax(); |
| 2391 | __ test(Operand(eax), Immediate(0x400 /* C2 */)); |
| 2392 | // If C2 is set, computation only has partial result. Loop to |
| 2393 | // continue computation. |
| 2394 | __ j(not_zero, &partial_remainder_loop); |
| 2395 | } |
| 2396 | // FPU Stack: input, 2*pi, input % 2*pi |
| 2397 | __ fstp(2); |
| 2398 | __ fstp(0); |
| 2399 | __ mov(eax, edi); // Restore eax (allocated HeapNumber pointer). |
| 2400 | |
| 2401 | // FPU Stack: input % 2*pi |
| 2402 | __ bind(&in_range); |
| 2403 | switch (type_) { |
| 2404 | case TranscendentalCache::SIN: |
| 2405 | __ fsin(); |
| 2406 | break; |
| 2407 | case TranscendentalCache::COS: |
| 2408 | __ fcos(); |
| 2409 | break; |
| 2410 | default: |
| 2411 | UNREACHABLE(); |
| 2412 | } |
| 2413 | __ bind(&done); |
| 2414 | } else { |
| 2415 | ASSERT(type_ == TranscendentalCache::LOG); |
| 2416 | __ fldln2(); |
| 2417 | __ fxch(); |
| 2418 | __ fyl2x(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2419 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2420 | } |
| 2421 | |
| 2422 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2423 | // Input: edx, eax are the left and right objects of a bit op. |
| 2424 | // Output: eax, ecx are left and right integers for a bit op. |
| 2425 | void FloatingPointHelper::LoadUnknownsAsIntegers(MacroAssembler* masm, |
| 2426 | bool use_sse3, |
| 2427 | Label* conversion_failure) { |
| 2428 | // Check float operands. |
| 2429 | Label arg1_is_object, check_undefined_arg1; |
| 2430 | Label arg2_is_object, check_undefined_arg2; |
| 2431 | Label load_arg2, done; |
| 2432 | |
| 2433 | // Test if arg1 is a Smi. |
| 2434 | __ test(edx, Immediate(kSmiTagMask)); |
| 2435 | __ j(not_zero, &arg1_is_object); |
| 2436 | |
| 2437 | __ SmiUntag(edx); |
| 2438 | __ jmp(&load_arg2); |
| 2439 | |
| 2440 | // If the argument is undefined it converts to zero (ECMA-262, section 9.5). |
| 2441 | __ bind(&check_undefined_arg1); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2442 | Factory* factory = masm->isolate()->factory(); |
| 2443 | __ cmp(edx, factory->undefined_value()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2444 | __ j(not_equal, conversion_failure); |
| 2445 | __ mov(edx, Immediate(0)); |
| 2446 | __ jmp(&load_arg2); |
| 2447 | |
| 2448 | __ bind(&arg1_is_object); |
| 2449 | __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2450 | __ cmp(ebx, factory->heap_number_map()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2451 | __ j(not_equal, &check_undefined_arg1); |
| 2452 | |
| 2453 | // Get the untagged integer version of the edx heap number in ecx. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2454 | IntegerConvert(masm, edx, use_sse3, conversion_failure); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2455 | __ mov(edx, ecx); |
| 2456 | |
| 2457 | // Here edx has the untagged integer, eax has a Smi or a heap number. |
| 2458 | __ bind(&load_arg2); |
| 2459 | |
| 2460 | // Test if arg2 is a Smi. |
| 2461 | __ test(eax, Immediate(kSmiTagMask)); |
| 2462 | __ j(not_zero, &arg2_is_object); |
| 2463 | |
| 2464 | __ SmiUntag(eax); |
| 2465 | __ mov(ecx, eax); |
| 2466 | __ jmp(&done); |
| 2467 | |
| 2468 | // If the argument is undefined it converts to zero (ECMA-262, section 9.5). |
| 2469 | __ bind(&check_undefined_arg2); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2470 | __ cmp(eax, factory->undefined_value()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2471 | __ j(not_equal, conversion_failure); |
| 2472 | __ mov(ecx, Immediate(0)); |
| 2473 | __ jmp(&done); |
| 2474 | |
| 2475 | __ bind(&arg2_is_object); |
| 2476 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2477 | __ cmp(ebx, factory->heap_number_map()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2478 | __ j(not_equal, &check_undefined_arg2); |
| 2479 | |
| 2480 | // Get the untagged integer version of the eax heap number in ecx. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2481 | IntegerConvert(masm, eax, use_sse3, conversion_failure); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2482 | __ bind(&done); |
| 2483 | __ mov(eax, edx); |
| 2484 | } |
| 2485 | |
| 2486 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2487 | void FloatingPointHelper::CheckLoadedIntegersWereInt32(MacroAssembler* masm, |
| 2488 | bool use_sse3, |
| 2489 | Label* not_int32) { |
| 2490 | return; |
| 2491 | } |
| 2492 | |
| 2493 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2494 | void FloatingPointHelper::LoadFloatOperand(MacroAssembler* masm, |
| 2495 | Register number) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2496 | Label load_smi, done; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2497 | |
| 2498 | __ test(number, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2499 | __ j(zero, &load_smi, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2500 | __ fld_d(FieldOperand(number, HeapNumber::kValueOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2501 | __ jmp(&done, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2502 | |
| 2503 | __ bind(&load_smi); |
| 2504 | __ SmiUntag(number); |
| 2505 | __ push(number); |
| 2506 | __ fild_s(Operand(esp, 0)); |
| 2507 | __ pop(number); |
| 2508 | |
| 2509 | __ bind(&done); |
| 2510 | } |
| 2511 | |
| 2512 | |
| 2513 | void FloatingPointHelper::LoadSSE2Operands(MacroAssembler* masm) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2514 | Label load_smi_edx, load_eax, load_smi_eax, done; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2515 | // Load operand in edx into xmm0. |
| 2516 | __ test(edx, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2517 | // Argument in edx is a smi. |
| 2518 | __ j(zero, &load_smi_edx, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2519 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 2520 | |
| 2521 | __ bind(&load_eax); |
| 2522 | // Load operand in eax into xmm1. |
| 2523 | __ test(eax, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2524 | // Argument in eax is a smi. |
| 2525 | __ j(zero, &load_smi_eax, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2526 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2527 | __ jmp(&done, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2528 | |
| 2529 | __ bind(&load_smi_edx); |
| 2530 | __ SmiUntag(edx); // Untag smi before converting to float. |
| 2531 | __ cvtsi2sd(xmm0, Operand(edx)); |
| 2532 | __ SmiTag(edx); // Retag smi for heap number overwriting test. |
| 2533 | __ jmp(&load_eax); |
| 2534 | |
| 2535 | __ bind(&load_smi_eax); |
| 2536 | __ SmiUntag(eax); // Untag smi before converting to float. |
| 2537 | __ cvtsi2sd(xmm1, Operand(eax)); |
| 2538 | __ SmiTag(eax); // Retag smi for heap number overwriting test. |
| 2539 | |
| 2540 | __ bind(&done); |
| 2541 | } |
| 2542 | |
| 2543 | |
| 2544 | void FloatingPointHelper::LoadSSE2Operands(MacroAssembler* masm, |
| 2545 | Label* not_numbers) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2546 | Label load_smi_edx, load_eax, load_smi_eax, load_float_eax, done; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2547 | // Load operand in edx into xmm0, or branch to not_numbers. |
| 2548 | __ test(edx, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2549 | // Argument in edx is a smi. |
| 2550 | __ j(zero, &load_smi_edx, Label::kNear); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2551 | Factory* factory = masm->isolate()->factory(); |
| 2552 | __ cmp(FieldOperand(edx, HeapObject::kMapOffset), factory->heap_number_map()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2553 | __ j(not_equal, not_numbers); // Argument in edx is not a number. |
| 2554 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 2555 | __ bind(&load_eax); |
| 2556 | // Load operand in eax into xmm1, or branch to not_numbers. |
| 2557 | __ test(eax, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2558 | // Argument in eax is a smi. |
| 2559 | __ j(zero, &load_smi_eax, Label::kNear); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2560 | __ cmp(FieldOperand(eax, HeapObject::kMapOffset), factory->heap_number_map()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2561 | __ j(equal, &load_float_eax, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2562 | __ jmp(not_numbers); // Argument in eax is not a number. |
| 2563 | __ bind(&load_smi_edx); |
| 2564 | __ SmiUntag(edx); // Untag smi before converting to float. |
| 2565 | __ cvtsi2sd(xmm0, Operand(edx)); |
| 2566 | __ SmiTag(edx); // Retag smi for heap number overwriting test. |
| 2567 | __ jmp(&load_eax); |
| 2568 | __ bind(&load_smi_eax); |
| 2569 | __ SmiUntag(eax); // Untag smi before converting to float. |
| 2570 | __ cvtsi2sd(xmm1, Operand(eax)); |
| 2571 | __ SmiTag(eax); // Retag smi for heap number overwriting test. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2572 | __ jmp(&done, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2573 | __ bind(&load_float_eax); |
| 2574 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2575 | __ bind(&done); |
| 2576 | } |
| 2577 | |
| 2578 | |
| 2579 | void FloatingPointHelper::LoadSSE2Smis(MacroAssembler* masm, |
| 2580 | Register scratch) { |
| 2581 | const Register left = edx; |
| 2582 | const Register right = eax; |
| 2583 | __ mov(scratch, left); |
| 2584 | ASSERT(!scratch.is(right)); // We're about to clobber scratch. |
| 2585 | __ SmiUntag(scratch); |
| 2586 | __ cvtsi2sd(xmm0, Operand(scratch)); |
| 2587 | |
| 2588 | __ mov(scratch, right); |
| 2589 | __ SmiUntag(scratch); |
| 2590 | __ cvtsi2sd(xmm1, Operand(scratch)); |
| 2591 | } |
| 2592 | |
| 2593 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2594 | void FloatingPointHelper::CheckSSE2OperandsAreInt32(MacroAssembler* masm, |
| 2595 | Label* non_int32, |
| 2596 | Register scratch) { |
| 2597 | __ cvttsd2si(scratch, Operand(xmm0)); |
| 2598 | __ cvtsi2sd(xmm2, Operand(scratch)); |
| 2599 | __ ucomisd(xmm0, xmm2); |
| 2600 | __ j(not_zero, non_int32); |
| 2601 | __ j(carry, non_int32); |
| 2602 | __ cvttsd2si(scratch, Operand(xmm1)); |
| 2603 | __ cvtsi2sd(xmm2, Operand(scratch)); |
| 2604 | __ ucomisd(xmm1, xmm2); |
| 2605 | __ j(not_zero, non_int32); |
| 2606 | __ j(carry, non_int32); |
| 2607 | } |
| 2608 | |
| 2609 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2610 | void FloatingPointHelper::LoadFloatOperands(MacroAssembler* masm, |
| 2611 | Register scratch, |
| 2612 | ArgLocation arg_location) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2613 | Label load_smi_1, load_smi_2, done_load_1, done; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2614 | if (arg_location == ARGS_IN_REGISTERS) { |
| 2615 | __ mov(scratch, edx); |
| 2616 | } else { |
| 2617 | __ mov(scratch, Operand(esp, 2 * kPointerSize)); |
| 2618 | } |
| 2619 | __ test(scratch, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2620 | __ j(zero, &load_smi_1, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2621 | __ fld_d(FieldOperand(scratch, HeapNumber::kValueOffset)); |
| 2622 | __ bind(&done_load_1); |
| 2623 | |
| 2624 | if (arg_location == ARGS_IN_REGISTERS) { |
| 2625 | __ mov(scratch, eax); |
| 2626 | } else { |
| 2627 | __ mov(scratch, Operand(esp, 1 * kPointerSize)); |
| 2628 | } |
| 2629 | __ test(scratch, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2630 | __ j(zero, &load_smi_2, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2631 | __ fld_d(FieldOperand(scratch, HeapNumber::kValueOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2632 | __ jmp(&done, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2633 | |
| 2634 | __ bind(&load_smi_1); |
| 2635 | __ SmiUntag(scratch); |
| 2636 | __ push(scratch); |
| 2637 | __ fild_s(Operand(esp, 0)); |
| 2638 | __ pop(scratch); |
| 2639 | __ jmp(&done_load_1); |
| 2640 | |
| 2641 | __ bind(&load_smi_2); |
| 2642 | __ SmiUntag(scratch); |
| 2643 | __ push(scratch); |
| 2644 | __ fild_s(Operand(esp, 0)); |
| 2645 | __ pop(scratch); |
| 2646 | |
| 2647 | __ bind(&done); |
| 2648 | } |
| 2649 | |
| 2650 | |
| 2651 | void FloatingPointHelper::LoadFloatSmis(MacroAssembler* masm, |
| 2652 | Register scratch) { |
| 2653 | const Register left = edx; |
| 2654 | const Register right = eax; |
| 2655 | __ mov(scratch, left); |
| 2656 | ASSERT(!scratch.is(right)); // We're about to clobber scratch. |
| 2657 | __ SmiUntag(scratch); |
| 2658 | __ push(scratch); |
| 2659 | __ fild_s(Operand(esp, 0)); |
| 2660 | |
| 2661 | __ mov(scratch, right); |
| 2662 | __ SmiUntag(scratch); |
| 2663 | __ mov(Operand(esp, 0), scratch); |
| 2664 | __ fild_s(Operand(esp, 0)); |
| 2665 | __ pop(scratch); |
| 2666 | } |
| 2667 | |
| 2668 | |
| 2669 | void FloatingPointHelper::CheckFloatOperands(MacroAssembler* masm, |
| 2670 | Label* non_float, |
| 2671 | Register scratch) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2672 | Label test_other, done; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2673 | // Test if both operands are floats or smi -> scratch=k_is_float; |
| 2674 | // Otherwise scratch = k_not_float. |
| 2675 | __ test(edx, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2676 | __ j(zero, &test_other, Label::kNear); // argument in edx is OK |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2677 | __ mov(scratch, FieldOperand(edx, HeapObject::kMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2678 | Factory* factory = masm->isolate()->factory(); |
| 2679 | __ cmp(scratch, factory->heap_number_map()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2680 | __ j(not_equal, non_float); // argument in edx is not a number -> NaN |
| 2681 | |
| 2682 | __ bind(&test_other); |
| 2683 | __ test(eax, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2684 | __ j(zero, &done, Label::kNear); // argument in eax is OK |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2685 | __ mov(scratch, FieldOperand(eax, HeapObject::kMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2686 | __ cmp(scratch, factory->heap_number_map()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2687 | __ j(not_equal, non_float); // argument in eax is not a number -> NaN |
| 2688 | |
| 2689 | // Fall-through: Both operands are numbers. |
| 2690 | __ bind(&done); |
| 2691 | } |
| 2692 | |
| 2693 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2694 | void FloatingPointHelper::CheckFloatOperandsAreInt32(MacroAssembler* masm, |
| 2695 | Label* non_int32) { |
| 2696 | return; |
| 2697 | } |
| 2698 | |
| 2699 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2700 | void MathPowStub::Generate(MacroAssembler* masm) { |
| 2701 | // Registers are used as follows: |
| 2702 | // edx = base |
| 2703 | // eax = exponent |
| 2704 | // ecx = temporary, result |
| 2705 | |
| 2706 | CpuFeatures::Scope use_sse2(SSE2); |
| 2707 | Label allocate_return, call_runtime; |
| 2708 | |
| 2709 | // Load input parameters. |
| 2710 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 2711 | __ mov(eax, Operand(esp, 1 * kPointerSize)); |
| 2712 | |
| 2713 | // Save 1 in xmm3 - we need this several times later on. |
| 2714 | __ mov(ecx, Immediate(1)); |
| 2715 | __ cvtsi2sd(xmm3, Operand(ecx)); |
| 2716 | |
| 2717 | Label exponent_nonsmi; |
| 2718 | Label base_nonsmi; |
| 2719 | // If the exponent is a heap number go to that specific case. |
| 2720 | __ test(eax, Immediate(kSmiTagMask)); |
| 2721 | __ j(not_zero, &exponent_nonsmi); |
| 2722 | __ test(edx, Immediate(kSmiTagMask)); |
| 2723 | __ j(not_zero, &base_nonsmi); |
| 2724 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2725 | // Optimized version when both exponent and base are smis. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2726 | Label powi; |
| 2727 | __ SmiUntag(edx); |
| 2728 | __ cvtsi2sd(xmm0, Operand(edx)); |
| 2729 | __ jmp(&powi); |
| 2730 | // exponent is smi and base is a heapnumber. |
| 2731 | __ bind(&base_nonsmi); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2732 | Factory* factory = masm->isolate()->factory(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2733 | __ cmp(FieldOperand(edx, HeapObject::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2734 | factory->heap_number_map()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2735 | __ j(not_equal, &call_runtime); |
| 2736 | |
| 2737 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 2738 | |
| 2739 | // Optimized version of pow if exponent is a smi. |
| 2740 | // xmm0 contains the base. |
| 2741 | __ bind(&powi); |
| 2742 | __ SmiUntag(eax); |
| 2743 | |
| 2744 | // Save exponent in base as we need to check if exponent is negative later. |
| 2745 | // We know that base and exponent are in different registers. |
| 2746 | __ mov(edx, eax); |
| 2747 | |
| 2748 | // Get absolute value of exponent. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2749 | Label no_neg; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2750 | __ cmp(eax, 0); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2751 | __ j(greater_equal, &no_neg, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2752 | __ neg(eax); |
| 2753 | __ bind(&no_neg); |
| 2754 | |
| 2755 | // Load xmm1 with 1. |
| 2756 | __ movsd(xmm1, xmm3); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2757 | Label while_true; |
| 2758 | Label no_multiply; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2759 | |
| 2760 | __ bind(&while_true); |
| 2761 | __ shr(eax, 1); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2762 | __ j(not_carry, &no_multiply, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2763 | __ mulsd(xmm1, xmm0); |
| 2764 | __ bind(&no_multiply); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2765 | __ mulsd(xmm0, xmm0); |
| 2766 | __ j(not_zero, &while_true); |
| 2767 | |
| 2768 | // base has the original value of the exponent - if the exponent is |
| 2769 | // negative return 1/result. |
| 2770 | __ test(edx, Operand(edx)); |
| 2771 | __ j(positive, &allocate_return); |
| 2772 | // Special case if xmm1 has reached infinity. |
| 2773 | __ mov(ecx, Immediate(0x7FB00000)); |
| 2774 | __ movd(xmm0, Operand(ecx)); |
| 2775 | __ cvtss2sd(xmm0, xmm0); |
| 2776 | __ ucomisd(xmm0, xmm1); |
| 2777 | __ j(equal, &call_runtime); |
| 2778 | __ divsd(xmm3, xmm1); |
| 2779 | __ movsd(xmm1, xmm3); |
| 2780 | __ jmp(&allocate_return); |
| 2781 | |
| 2782 | // exponent (or both) is a heapnumber - no matter what we should now work |
| 2783 | // on doubles. |
| 2784 | __ bind(&exponent_nonsmi); |
| 2785 | __ cmp(FieldOperand(eax, HeapObject::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2786 | factory->heap_number_map()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2787 | __ j(not_equal, &call_runtime); |
| 2788 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2789 | // Test if exponent is nan. |
| 2790 | __ ucomisd(xmm1, xmm1); |
| 2791 | __ j(parity_even, &call_runtime); |
| 2792 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2793 | Label base_not_smi; |
| 2794 | Label handle_special_cases; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2795 | __ test(edx, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2796 | __ j(not_zero, &base_not_smi, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2797 | __ SmiUntag(edx); |
| 2798 | __ cvtsi2sd(xmm0, Operand(edx)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2799 | __ jmp(&handle_special_cases, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2800 | |
| 2801 | __ bind(&base_not_smi); |
| 2802 | __ cmp(FieldOperand(edx, HeapObject::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2803 | factory->heap_number_map()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2804 | __ j(not_equal, &call_runtime); |
| 2805 | __ mov(ecx, FieldOperand(edx, HeapNumber::kExponentOffset)); |
| 2806 | __ and_(ecx, HeapNumber::kExponentMask); |
| 2807 | __ cmp(Operand(ecx), Immediate(HeapNumber::kExponentMask)); |
| 2808 | // base is NaN or +/-Infinity |
| 2809 | __ j(greater_equal, &call_runtime); |
| 2810 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 2811 | |
| 2812 | // base is in xmm0 and exponent is in xmm1. |
| 2813 | __ bind(&handle_special_cases); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2814 | Label not_minus_half; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2815 | // Test for -0.5. |
| 2816 | // Load xmm2 with -0.5. |
| 2817 | __ mov(ecx, Immediate(0xBF000000)); |
| 2818 | __ movd(xmm2, Operand(ecx)); |
| 2819 | __ cvtss2sd(xmm2, xmm2); |
| 2820 | // xmm2 now has -0.5. |
| 2821 | __ ucomisd(xmm2, xmm1); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2822 | __ j(not_equal, ¬_minus_half, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2823 | |
| 2824 | // Calculates reciprocal of square root. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2825 | // sqrtsd returns -0 when input is -0. ECMA spec requires +0. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2826 | __ xorps(xmm1, xmm1); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2827 | __ addsd(xmm1, xmm0); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2828 | __ sqrtsd(xmm1, xmm1); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2829 | __ divsd(xmm3, xmm1); |
| 2830 | __ movsd(xmm1, xmm3); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2831 | __ jmp(&allocate_return); |
| 2832 | |
| 2833 | // Test for 0.5. |
| 2834 | __ bind(¬_minus_half); |
| 2835 | // Load xmm2 with 0.5. |
| 2836 | // Since xmm3 is 1 and xmm2 is -0.5 this is simply xmm2 + xmm3. |
| 2837 | __ addsd(xmm2, xmm3); |
| 2838 | // xmm2 now has 0.5. |
| 2839 | __ ucomisd(xmm2, xmm1); |
| 2840 | __ j(not_equal, &call_runtime); |
| 2841 | // Calculates square root. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2842 | // sqrtsd returns -0 when input is -0. ECMA spec requires +0. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2843 | __ xorps(xmm1, xmm1); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2844 | __ addsd(xmm1, xmm0); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2845 | __ sqrtsd(xmm1, xmm1); |
| 2846 | |
| 2847 | __ bind(&allocate_return); |
| 2848 | __ AllocateHeapNumber(ecx, eax, edx, &call_runtime); |
| 2849 | __ movdbl(FieldOperand(ecx, HeapNumber::kValueOffset), xmm1); |
| 2850 | __ mov(eax, ecx); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2851 | __ ret(2 * kPointerSize); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2852 | |
| 2853 | __ bind(&call_runtime); |
| 2854 | __ TailCallRuntime(Runtime::kMath_pow_cfunction, 2, 1); |
| 2855 | } |
| 2856 | |
| 2857 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2858 | void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) { |
| 2859 | // The key is in edx and the parameter count is in eax. |
| 2860 | |
| 2861 | // The displacement is used for skipping the frame pointer on the |
| 2862 | // stack. It is the offset of the last parameter (if any) relative |
| 2863 | // to the frame pointer. |
| 2864 | static const int kDisplacement = 1 * kPointerSize; |
| 2865 | |
| 2866 | // Check that the key is a smi. |
| 2867 | Label slow; |
| 2868 | __ test(edx, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2869 | __ j(not_zero, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2870 | |
| 2871 | // Check if the calling frame is an arguments adaptor frame. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2872 | Label adaptor; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2873 | __ mov(ebx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 2874 | __ mov(ecx, Operand(ebx, StandardFrameConstants::kContextOffset)); |
| 2875 | __ cmp(Operand(ecx), Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2876 | __ j(equal, &adaptor, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2877 | |
| 2878 | // Check index against formal parameters count limit passed in |
| 2879 | // through register eax. Use unsigned comparison to get negative |
| 2880 | // check for free. |
| 2881 | __ cmp(edx, Operand(eax)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2882 | __ j(above_equal, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2883 | |
| 2884 | // Read the argument from the stack and return it. |
| 2885 | STATIC_ASSERT(kSmiTagSize == 1); |
| 2886 | STATIC_ASSERT(kSmiTag == 0); // Shifting code depends on these. |
| 2887 | __ lea(ebx, Operand(ebp, eax, times_2, 0)); |
| 2888 | __ neg(edx); |
| 2889 | __ mov(eax, Operand(ebx, edx, times_2, kDisplacement)); |
| 2890 | __ ret(0); |
| 2891 | |
| 2892 | // Arguments adaptor case: Check index against actual arguments |
| 2893 | // limit found in the arguments adaptor frame. Use unsigned |
| 2894 | // comparison to get negative check for free. |
| 2895 | __ bind(&adaptor); |
| 2896 | __ mov(ecx, Operand(ebx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 2897 | __ cmp(edx, Operand(ecx)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2898 | __ j(above_equal, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2899 | |
| 2900 | // Read the argument from the stack and return it. |
| 2901 | STATIC_ASSERT(kSmiTagSize == 1); |
| 2902 | STATIC_ASSERT(kSmiTag == 0); // Shifting code depends on these. |
| 2903 | __ lea(ebx, Operand(ebx, ecx, times_2, 0)); |
| 2904 | __ neg(edx); |
| 2905 | __ mov(eax, Operand(ebx, edx, times_2, kDisplacement)); |
| 2906 | __ ret(0); |
| 2907 | |
| 2908 | // Slow-case: Handle non-smi or out-of-bounds access to arguments |
| 2909 | // by calling the runtime system. |
| 2910 | __ bind(&slow); |
| 2911 | __ pop(ebx); // Return address. |
| 2912 | __ push(edx); |
| 2913 | __ push(ebx); |
| 2914 | __ TailCallRuntime(Runtime::kGetArgumentsProperty, 1, 1); |
| 2915 | } |
| 2916 | |
| 2917 | |
| 2918 | void ArgumentsAccessStub::GenerateNewObject(MacroAssembler* masm) { |
| 2919 | // esp[0] : return address |
| 2920 | // esp[4] : number of parameters |
| 2921 | // esp[8] : receiver displacement |
| 2922 | // esp[16] : function |
| 2923 | |
| 2924 | // The displacement is used for skipping the return address and the |
| 2925 | // frame pointer on the stack. It is the offset of the last |
| 2926 | // parameter (if any) relative to the frame pointer. |
| 2927 | static const int kDisplacement = 2 * kPointerSize; |
| 2928 | |
| 2929 | // Check if the calling frame is an arguments adaptor frame. |
| 2930 | Label adaptor_frame, try_allocate, runtime; |
| 2931 | __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 2932 | __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset)); |
| 2933 | __ cmp(Operand(ecx), Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 2934 | __ j(equal, &adaptor_frame); |
| 2935 | |
| 2936 | // Get the length from the frame. |
| 2937 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); |
| 2938 | __ jmp(&try_allocate); |
| 2939 | |
| 2940 | // Patch the arguments.length and the parameters pointer. |
| 2941 | __ bind(&adaptor_frame); |
| 2942 | __ mov(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 2943 | __ mov(Operand(esp, 1 * kPointerSize), ecx); |
| 2944 | __ lea(edx, Operand(edx, ecx, times_2, kDisplacement)); |
| 2945 | __ mov(Operand(esp, 2 * kPointerSize), edx); |
| 2946 | |
| 2947 | // Try the new space allocation. Start out with computing the size of |
| 2948 | // the arguments object and the elements array. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2949 | Label add_arguments_object; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2950 | __ bind(&try_allocate); |
| 2951 | __ test(ecx, Operand(ecx)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 2952 | __ j(zero, &add_arguments_object, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2953 | __ lea(ecx, Operand(ecx, times_2, FixedArray::kHeaderSize)); |
| 2954 | __ bind(&add_arguments_object); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2955 | __ add(Operand(ecx), Immediate(GetArgumentsObjectSize())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2956 | |
| 2957 | // Do the allocation of both objects in one go. |
| 2958 | __ AllocateInNewSpace(ecx, eax, edx, ebx, &runtime, TAG_OBJECT); |
| 2959 | |
| 2960 | // Get the arguments boilerplate from the current (global) context. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2961 | __ mov(edi, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 2962 | __ mov(edi, FieldOperand(edi, GlobalObject::kGlobalContextOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2963 | __ mov(edi, Operand(edi, |
| 2964 | Context::SlotOffset(GetArgumentsBoilerplateIndex()))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2965 | |
| 2966 | // Copy the JS object part. |
| 2967 | for (int i = 0; i < JSObject::kHeaderSize; i += kPointerSize) { |
| 2968 | __ mov(ebx, FieldOperand(edi, i)); |
| 2969 | __ mov(FieldOperand(eax, i), ebx); |
| 2970 | } |
| 2971 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2972 | if (type_ == NEW_NON_STRICT) { |
| 2973 | // Setup the callee in-object property. |
| 2974 | STATIC_ASSERT(Heap::kArgumentsCalleeIndex == 1); |
| 2975 | __ mov(ebx, Operand(esp, 3 * kPointerSize)); |
| 2976 | __ mov(FieldOperand(eax, JSObject::kHeaderSize + |
| 2977 | Heap::kArgumentsCalleeIndex * kPointerSize), |
| 2978 | ebx); |
| 2979 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2980 | |
| 2981 | // 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] | 2982 | STATIC_ASSERT(Heap::kArgumentsLengthIndex == 0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2983 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2984 | __ mov(FieldOperand(eax, JSObject::kHeaderSize + |
| 2985 | Heap::kArgumentsLengthIndex * kPointerSize), |
| 2986 | ecx); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2987 | |
| 2988 | // If there are no actual arguments, we're done. |
| 2989 | Label done; |
| 2990 | __ test(ecx, Operand(ecx)); |
| 2991 | __ j(zero, &done); |
| 2992 | |
| 2993 | // Get the parameters pointer from the stack. |
| 2994 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 2995 | |
| 2996 | // Setup the elements pointer in the allocated arguments object and |
| 2997 | // initialize the header in the elements fixed array. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2998 | __ lea(edi, Operand(eax, GetArgumentsObjectSize())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2999 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), edi); |
| 3000 | __ mov(FieldOperand(edi, FixedArray::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3001 | Immediate(masm->isolate()->factory()->fixed_array_map())); |
| 3002 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3003 | __ mov(FieldOperand(edi, FixedArray::kLengthOffset), ecx); |
| 3004 | // Untag the length for the loop below. |
| 3005 | __ SmiUntag(ecx); |
| 3006 | |
| 3007 | // Copy the fixed array slots. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3008 | Label loop; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3009 | __ bind(&loop); |
| 3010 | __ mov(ebx, Operand(edx, -1 * kPointerSize)); // Skip receiver. |
| 3011 | __ mov(FieldOperand(edi, FixedArray::kHeaderSize), ebx); |
| 3012 | __ add(Operand(edi), Immediate(kPointerSize)); |
| 3013 | __ sub(Operand(edx), Immediate(kPointerSize)); |
| 3014 | __ dec(ecx); |
| 3015 | __ j(not_zero, &loop); |
| 3016 | |
| 3017 | // Return and remove the on-stack parameters. |
| 3018 | __ bind(&done); |
| 3019 | __ ret(3 * kPointerSize); |
| 3020 | |
| 3021 | // Do the runtime call to allocate the arguments object. |
| 3022 | __ bind(&runtime); |
| 3023 | __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); |
| 3024 | } |
| 3025 | |
| 3026 | |
| 3027 | void RegExpExecStub::Generate(MacroAssembler* masm) { |
| 3028 | // Just jump directly to runtime if native RegExp is not selected at compile |
| 3029 | // time or if regexp entry in generated code is turned off runtime switch or |
| 3030 | // at compilation. |
| 3031 | #ifdef V8_INTERPRETED_REGEXP |
| 3032 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 3033 | #else // V8_INTERPRETED_REGEXP |
| 3034 | if (!FLAG_regexp_entry_native) { |
| 3035 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 3036 | return; |
| 3037 | } |
| 3038 | |
| 3039 | // Stack frame on entry. |
| 3040 | // esp[0]: return address |
| 3041 | // esp[4]: last_match_info (expected JSArray) |
| 3042 | // esp[8]: previous index |
| 3043 | // esp[12]: subject string |
| 3044 | // esp[16]: JSRegExp object |
| 3045 | |
| 3046 | static const int kLastMatchInfoOffset = 1 * kPointerSize; |
| 3047 | static const int kPreviousIndexOffset = 2 * kPointerSize; |
| 3048 | static const int kSubjectOffset = 3 * kPointerSize; |
| 3049 | static const int kJSRegExpOffset = 4 * kPointerSize; |
| 3050 | |
| 3051 | Label runtime, invoke_regexp; |
| 3052 | |
| 3053 | // Ensure that a RegExp stack is allocated. |
| 3054 | ExternalReference address_of_regexp_stack_memory_address = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3055 | ExternalReference::address_of_regexp_stack_memory_address( |
| 3056 | masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3057 | ExternalReference address_of_regexp_stack_memory_size = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3058 | ExternalReference::address_of_regexp_stack_memory_size(masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3059 | __ mov(ebx, Operand::StaticVariable(address_of_regexp_stack_memory_size)); |
| 3060 | __ test(ebx, Operand(ebx)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3061 | __ j(zero, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3062 | |
| 3063 | // Check that the first argument is a JSRegExp object. |
| 3064 | __ mov(eax, Operand(esp, kJSRegExpOffset)); |
| 3065 | STATIC_ASSERT(kSmiTag == 0); |
| 3066 | __ test(eax, Immediate(kSmiTagMask)); |
| 3067 | __ j(zero, &runtime); |
| 3068 | __ CmpObjectType(eax, JS_REGEXP_TYPE, ecx); |
| 3069 | __ j(not_equal, &runtime); |
| 3070 | // Check that the RegExp has been compiled (data contains a fixed array). |
| 3071 | __ mov(ecx, FieldOperand(eax, JSRegExp::kDataOffset)); |
| 3072 | if (FLAG_debug_code) { |
| 3073 | __ test(ecx, Immediate(kSmiTagMask)); |
| 3074 | __ Check(not_zero, "Unexpected type for RegExp data, FixedArray expected"); |
| 3075 | __ CmpObjectType(ecx, FIXED_ARRAY_TYPE, ebx); |
| 3076 | __ Check(equal, "Unexpected type for RegExp data, FixedArray expected"); |
| 3077 | } |
| 3078 | |
| 3079 | // ecx: RegExp data (FixedArray) |
| 3080 | // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| 3081 | __ mov(ebx, FieldOperand(ecx, JSRegExp::kDataTagOffset)); |
| 3082 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(JSRegExp::IRREGEXP))); |
| 3083 | __ j(not_equal, &runtime); |
| 3084 | |
| 3085 | // ecx: RegExp data (FixedArray) |
| 3086 | // Check that the number of captures fit in the static offsets vector buffer. |
| 3087 | __ mov(edx, FieldOperand(ecx, JSRegExp::kIrregexpCaptureCountOffset)); |
| 3088 | // Calculate number of capture registers (number_of_captures + 1) * 2. This |
| 3089 | // uses the asumption that smis are 2 * their untagged value. |
| 3090 | STATIC_ASSERT(kSmiTag == 0); |
| 3091 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 3092 | __ add(Operand(edx), Immediate(2)); // edx was a smi. |
| 3093 | // Check that the static offsets vector buffer is large enough. |
| 3094 | __ cmp(edx, OffsetsVector::kStaticOffsetsVectorSize); |
| 3095 | __ j(above, &runtime); |
| 3096 | |
| 3097 | // ecx: RegExp data (FixedArray) |
| 3098 | // edx: Number of capture registers |
| 3099 | // Check that the second argument is a string. |
| 3100 | __ mov(eax, Operand(esp, kSubjectOffset)); |
| 3101 | __ test(eax, Immediate(kSmiTagMask)); |
| 3102 | __ j(zero, &runtime); |
| 3103 | Condition is_string = masm->IsObjectStringType(eax, ebx, ebx); |
| 3104 | __ j(NegateCondition(is_string), &runtime); |
| 3105 | // Get the length of the string to ebx. |
| 3106 | __ mov(ebx, FieldOperand(eax, String::kLengthOffset)); |
| 3107 | |
| 3108 | // ebx: Length of subject string as a smi |
| 3109 | // ecx: RegExp data (FixedArray) |
| 3110 | // edx: Number of capture registers |
| 3111 | // Check that the third argument is a positive smi less than the subject |
| 3112 | // string length. A negative value will be greater (unsigned comparison). |
| 3113 | __ mov(eax, Operand(esp, kPreviousIndexOffset)); |
| 3114 | __ test(eax, Immediate(kSmiTagMask)); |
| 3115 | __ j(not_zero, &runtime); |
| 3116 | __ cmp(eax, Operand(ebx)); |
| 3117 | __ j(above_equal, &runtime); |
| 3118 | |
| 3119 | // ecx: RegExp data (FixedArray) |
| 3120 | // edx: Number of capture registers |
| 3121 | // Check that the fourth object is a JSArray object. |
| 3122 | __ mov(eax, Operand(esp, kLastMatchInfoOffset)); |
| 3123 | __ test(eax, Immediate(kSmiTagMask)); |
| 3124 | __ j(zero, &runtime); |
| 3125 | __ CmpObjectType(eax, JS_ARRAY_TYPE, ebx); |
| 3126 | __ j(not_equal, &runtime); |
| 3127 | // Check that the JSArray is in fast case. |
| 3128 | __ mov(ebx, FieldOperand(eax, JSArray::kElementsOffset)); |
| 3129 | __ mov(eax, FieldOperand(ebx, HeapObject::kMapOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3130 | Factory* factory = masm->isolate()->factory(); |
| 3131 | __ cmp(eax, factory->fixed_array_map()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3132 | __ j(not_equal, &runtime); |
| 3133 | // Check that the last match info has space for the capture registers and the |
| 3134 | // additional information. |
| 3135 | __ mov(eax, FieldOperand(ebx, FixedArray::kLengthOffset)); |
| 3136 | __ SmiUntag(eax); |
| 3137 | __ add(Operand(edx), Immediate(RegExpImpl::kLastMatchOverhead)); |
| 3138 | __ cmp(edx, Operand(eax)); |
| 3139 | __ j(greater, &runtime); |
| 3140 | |
| 3141 | // ecx: RegExp data (FixedArray) |
| 3142 | // Check the representation and encoding of the subject string. |
| 3143 | Label seq_ascii_string, seq_two_byte_string, check_code; |
| 3144 | __ mov(eax, Operand(esp, kSubjectOffset)); |
| 3145 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3146 | __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| 3147 | // First check for flat two byte string. |
| 3148 | __ and_(ebx, |
| 3149 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask); |
| 3150 | STATIC_ASSERT((kStringTag | kSeqStringTag | kTwoByteStringTag) == 0); |
| 3151 | __ j(zero, &seq_two_byte_string); |
| 3152 | // Any other flat string must be a flat ascii string. |
| 3153 | __ test(Operand(ebx), |
| 3154 | Immediate(kIsNotStringMask | kStringRepresentationMask)); |
| 3155 | __ j(zero, &seq_ascii_string); |
| 3156 | |
| 3157 | // Check for flat cons string. |
| 3158 | // A flat cons string is a cons string where the second part is the empty |
| 3159 | // string. In that case the subject string is just the first part of the cons |
| 3160 | // string. Also in this case the first part of the cons string is known to be |
| 3161 | // a sequential string or an external string. |
| 3162 | STATIC_ASSERT(kExternalStringTag != 0); |
| 3163 | STATIC_ASSERT((kConsStringTag & kExternalStringTag) == 0); |
| 3164 | __ test(Operand(ebx), |
| 3165 | Immediate(kIsNotStringMask | kExternalStringTag)); |
| 3166 | __ j(not_zero, &runtime); |
| 3167 | // String is a cons string. |
| 3168 | __ mov(edx, FieldOperand(eax, ConsString::kSecondOffset)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3169 | __ cmp(Operand(edx), factory->empty_string()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3170 | __ j(not_equal, &runtime); |
| 3171 | __ mov(eax, FieldOperand(eax, ConsString::kFirstOffset)); |
| 3172 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3173 | // String is a cons string with empty second part. |
| 3174 | // eax: first part of cons string. |
| 3175 | // ebx: map of first part of cons string. |
| 3176 | // Is first part a flat two byte string? |
| 3177 | __ test_b(FieldOperand(ebx, Map::kInstanceTypeOffset), |
| 3178 | kStringRepresentationMask | kStringEncodingMask); |
| 3179 | STATIC_ASSERT((kSeqStringTag | kTwoByteStringTag) == 0); |
| 3180 | __ j(zero, &seq_two_byte_string); |
| 3181 | // Any other flat string must be ascii. |
| 3182 | __ test_b(FieldOperand(ebx, Map::kInstanceTypeOffset), |
| 3183 | kStringRepresentationMask); |
| 3184 | __ j(not_zero, &runtime); |
| 3185 | |
| 3186 | __ bind(&seq_ascii_string); |
| 3187 | // eax: subject string (flat ascii) |
| 3188 | // ecx: RegExp data (FixedArray) |
| 3189 | __ mov(edx, FieldOperand(ecx, JSRegExp::kDataAsciiCodeOffset)); |
| 3190 | __ Set(edi, Immediate(1)); // Type is ascii. |
| 3191 | __ jmp(&check_code); |
| 3192 | |
| 3193 | __ bind(&seq_two_byte_string); |
| 3194 | // eax: subject string (flat two byte) |
| 3195 | // ecx: RegExp data (FixedArray) |
| 3196 | __ mov(edx, FieldOperand(ecx, JSRegExp::kDataUC16CodeOffset)); |
| 3197 | __ Set(edi, Immediate(0)); // Type is two byte. |
| 3198 | |
| 3199 | __ bind(&check_code); |
| 3200 | // Check that the irregexp code has been generated for the actual string |
| 3201 | // encoding. If it has, the field contains a code object otherwise it contains |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3202 | // a smi (code flushing support). |
| 3203 | __ JumpIfSmi(edx, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3204 | |
| 3205 | // eax: subject string |
| 3206 | // edx: code |
| 3207 | // edi: encoding of subject string (1 if ascii, 0 if two_byte); |
| 3208 | // Load used arguments before starting to push arguments for call to native |
| 3209 | // RegExp code to avoid handling changing stack height. |
| 3210 | __ mov(ebx, Operand(esp, kPreviousIndexOffset)); |
| 3211 | __ SmiUntag(ebx); // Previous index from smi. |
| 3212 | |
| 3213 | // eax: subject string |
| 3214 | // ebx: previous index |
| 3215 | // edx: code |
| 3216 | // edi: encoding of subject string (1 if ascii 0 if two_byte); |
| 3217 | // All checks done. Now push arguments for native regexp code. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3218 | Counters* counters = masm->isolate()->counters(); |
| 3219 | __ IncrementCounter(counters->regexp_entry_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3220 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3221 | // Isolates: note we add an additional parameter here (isolate pointer). |
| 3222 | static const int kRegExpExecuteArguments = 8; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3223 | __ EnterApiExitFrame(kRegExpExecuteArguments); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3224 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3225 | // Argument 8: Pass current isolate address. |
| 3226 | __ mov(Operand(esp, 7 * kPointerSize), |
| 3227 | Immediate(ExternalReference::isolate_address())); |
| 3228 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3229 | // Argument 7: Indicate that this is a direct call from JavaScript. |
| 3230 | __ mov(Operand(esp, 6 * kPointerSize), Immediate(1)); |
| 3231 | |
| 3232 | // Argument 6: Start (high end) of backtracking stack memory area. |
| 3233 | __ mov(ecx, Operand::StaticVariable(address_of_regexp_stack_memory_address)); |
| 3234 | __ add(ecx, Operand::StaticVariable(address_of_regexp_stack_memory_size)); |
| 3235 | __ mov(Operand(esp, 5 * kPointerSize), ecx); |
| 3236 | |
| 3237 | // Argument 5: static offsets vector buffer. |
| 3238 | __ mov(Operand(esp, 4 * kPointerSize), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3239 | Immediate(ExternalReference::address_of_static_offsets_vector( |
| 3240 | masm->isolate()))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3241 | |
| 3242 | // Argument 4: End of string data |
| 3243 | // Argument 3: Start of string data |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3244 | Label setup_two_byte, setup_rest; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3245 | __ test(edi, Operand(edi)); |
| 3246 | __ mov(edi, FieldOperand(eax, String::kLengthOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3247 | __ j(zero, &setup_two_byte, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3248 | __ SmiUntag(edi); |
| 3249 | __ lea(ecx, FieldOperand(eax, edi, times_1, SeqAsciiString::kHeaderSize)); |
| 3250 | __ mov(Operand(esp, 3 * kPointerSize), ecx); // Argument 4. |
| 3251 | __ lea(ecx, FieldOperand(eax, ebx, times_1, SeqAsciiString::kHeaderSize)); |
| 3252 | __ mov(Operand(esp, 2 * kPointerSize), ecx); // Argument 3. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3253 | __ jmp(&setup_rest, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3254 | |
| 3255 | __ bind(&setup_two_byte); |
| 3256 | STATIC_ASSERT(kSmiTag == 0); |
| 3257 | STATIC_ASSERT(kSmiTagSize == 1); // edi is smi (powered by 2). |
| 3258 | __ lea(ecx, FieldOperand(eax, edi, times_1, SeqTwoByteString::kHeaderSize)); |
| 3259 | __ mov(Operand(esp, 3 * kPointerSize), ecx); // Argument 4. |
| 3260 | __ lea(ecx, FieldOperand(eax, ebx, times_2, SeqTwoByteString::kHeaderSize)); |
| 3261 | __ mov(Operand(esp, 2 * kPointerSize), ecx); // Argument 3. |
| 3262 | |
| 3263 | __ bind(&setup_rest); |
| 3264 | |
| 3265 | // Argument 2: Previous index. |
| 3266 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
| 3267 | |
| 3268 | // Argument 1: Subject string. |
| 3269 | __ mov(Operand(esp, 0 * kPointerSize), eax); |
| 3270 | |
| 3271 | // Locate the code entry and call it. |
| 3272 | __ add(Operand(edx), Immediate(Code::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3273 | __ call(Operand(edx)); |
| 3274 | |
| 3275 | // Drop arguments and come back to JS mode. |
| 3276 | __ LeaveApiExitFrame(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3277 | |
| 3278 | // Check the result. |
| 3279 | Label success; |
| 3280 | __ cmp(eax, NativeRegExpMacroAssembler::SUCCESS); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3281 | __ j(equal, &success); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3282 | Label failure; |
| 3283 | __ cmp(eax, NativeRegExpMacroAssembler::FAILURE); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3284 | __ j(equal, &failure); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3285 | __ cmp(eax, NativeRegExpMacroAssembler::EXCEPTION); |
| 3286 | // If not exception it can only be retry. Handle that in the runtime system. |
| 3287 | __ j(not_equal, &runtime); |
| 3288 | // Result must now be exception. If there is no pending exception already a |
| 3289 | // stack overflow (on the backtrack stack) was detected in RegExp code but |
| 3290 | // haven't created the exception yet. Handle that in the runtime system. |
| 3291 | // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3292 | ExternalReference pending_exception(Isolate::k_pending_exception_address, |
| 3293 | masm->isolate()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3294 | __ mov(edx, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3295 | Operand::StaticVariable(ExternalReference::the_hole_value_location( |
| 3296 | masm->isolate()))); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3297 | __ mov(eax, Operand::StaticVariable(pending_exception)); |
| 3298 | __ cmp(edx, Operand(eax)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3299 | __ j(equal, &runtime); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3300 | // For exception, throw the exception again. |
| 3301 | |
| 3302 | // Clear the pending exception variable. |
| 3303 | __ mov(Operand::StaticVariable(pending_exception), edx); |
| 3304 | |
| 3305 | // Special handling of termination exceptions which are uncatchable |
| 3306 | // by javascript code. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3307 | __ cmp(eax, factory->termination_exception()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3308 | Label throw_termination_exception; |
| 3309 | __ j(equal, &throw_termination_exception); |
| 3310 | |
| 3311 | // Handle normal exception by following handler chain. |
| 3312 | __ Throw(eax); |
| 3313 | |
| 3314 | __ bind(&throw_termination_exception); |
| 3315 | __ ThrowUncatchable(TERMINATION, eax); |
| 3316 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3317 | __ bind(&failure); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3318 | // For failure to match, return null. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3319 | __ mov(Operand(eax), factory->null_value()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3320 | __ ret(4 * kPointerSize); |
| 3321 | |
| 3322 | // Load RegExp data. |
| 3323 | __ bind(&success); |
| 3324 | __ mov(eax, Operand(esp, kJSRegExpOffset)); |
| 3325 | __ mov(ecx, FieldOperand(eax, JSRegExp::kDataOffset)); |
| 3326 | __ mov(edx, FieldOperand(ecx, JSRegExp::kIrregexpCaptureCountOffset)); |
| 3327 | // Calculate number of capture registers (number_of_captures + 1) * 2. |
| 3328 | STATIC_ASSERT(kSmiTag == 0); |
| 3329 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 3330 | __ add(Operand(edx), Immediate(2)); // edx was a smi. |
| 3331 | |
| 3332 | // edx: Number of capture registers |
| 3333 | // Load last_match_info which is still known to be a fast case JSArray. |
| 3334 | __ mov(eax, Operand(esp, kLastMatchInfoOffset)); |
| 3335 | __ mov(ebx, FieldOperand(eax, JSArray::kElementsOffset)); |
| 3336 | |
| 3337 | // ebx: last_match_info backing store (FixedArray) |
| 3338 | // edx: number of capture registers |
| 3339 | // Store the capture count. |
| 3340 | __ SmiTag(edx); // Number of capture registers to smi. |
| 3341 | __ mov(FieldOperand(ebx, RegExpImpl::kLastCaptureCountOffset), edx); |
| 3342 | __ SmiUntag(edx); // Number of capture registers back from smi. |
| 3343 | // Store last subject and last input. |
| 3344 | __ mov(eax, Operand(esp, kSubjectOffset)); |
| 3345 | __ mov(FieldOperand(ebx, RegExpImpl::kLastSubjectOffset), eax); |
| 3346 | __ mov(ecx, ebx); |
| 3347 | __ RecordWrite(ecx, RegExpImpl::kLastSubjectOffset, eax, edi); |
| 3348 | __ mov(eax, Operand(esp, kSubjectOffset)); |
| 3349 | __ mov(FieldOperand(ebx, RegExpImpl::kLastInputOffset), eax); |
| 3350 | __ mov(ecx, ebx); |
| 3351 | __ RecordWrite(ecx, RegExpImpl::kLastInputOffset, eax, edi); |
| 3352 | |
| 3353 | // Get the static offsets vector filled by the native regexp code. |
| 3354 | ExternalReference address_of_static_offsets_vector = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3355 | ExternalReference::address_of_static_offsets_vector(masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3356 | __ mov(ecx, Immediate(address_of_static_offsets_vector)); |
| 3357 | |
| 3358 | // ebx: last_match_info backing store (FixedArray) |
| 3359 | // ecx: offsets vector |
| 3360 | // edx: number of capture registers |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3361 | Label next_capture, done; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3362 | // Capture register counter starts from number of capture registers and |
| 3363 | // counts down until wraping after zero. |
| 3364 | __ bind(&next_capture); |
| 3365 | __ sub(Operand(edx), Immediate(1)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3366 | __ j(negative, &done, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3367 | // Read the value from the static offsets vector buffer. |
| 3368 | __ mov(edi, Operand(ecx, edx, times_int_size, 0)); |
| 3369 | __ SmiTag(edi); |
| 3370 | // Store the smi value in the last match info. |
| 3371 | __ mov(FieldOperand(ebx, |
| 3372 | edx, |
| 3373 | times_pointer_size, |
| 3374 | RegExpImpl::kFirstCaptureOffset), |
| 3375 | edi); |
| 3376 | __ jmp(&next_capture); |
| 3377 | __ bind(&done); |
| 3378 | |
| 3379 | // Return last match info. |
| 3380 | __ mov(eax, Operand(esp, kLastMatchInfoOffset)); |
| 3381 | __ ret(4 * kPointerSize); |
| 3382 | |
| 3383 | // Do the runtime call to execute the regexp. |
| 3384 | __ bind(&runtime); |
| 3385 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 3386 | #endif // V8_INTERPRETED_REGEXP |
| 3387 | } |
| 3388 | |
| 3389 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3390 | void RegExpConstructResultStub::Generate(MacroAssembler* masm) { |
| 3391 | const int kMaxInlineLength = 100; |
| 3392 | Label slowcase; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3393 | Label done; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3394 | __ mov(ebx, Operand(esp, kPointerSize * 3)); |
| 3395 | __ test(ebx, Immediate(kSmiTagMask)); |
| 3396 | __ j(not_zero, &slowcase); |
| 3397 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(kMaxInlineLength))); |
| 3398 | __ j(above, &slowcase); |
| 3399 | // Smi-tagging is equivalent to multiplying by 2. |
| 3400 | STATIC_ASSERT(kSmiTag == 0); |
| 3401 | STATIC_ASSERT(kSmiTagSize == 1); |
| 3402 | // Allocate RegExpResult followed by FixedArray with size in ebx. |
| 3403 | // JSArray: [Map][empty properties][Elements][Length-smi][index][input] |
| 3404 | // Elements: [Map][Length][..elements..] |
| 3405 | __ AllocateInNewSpace(JSRegExpResult::kSize + FixedArray::kHeaderSize, |
| 3406 | times_half_pointer_size, |
| 3407 | ebx, // In: Number of elements (times 2, being a smi) |
| 3408 | eax, // Out: Start of allocation (tagged). |
| 3409 | ecx, // Out: End of allocation. |
| 3410 | edx, // Scratch register |
| 3411 | &slowcase, |
| 3412 | TAG_OBJECT); |
| 3413 | // eax: Start of allocated area, object-tagged. |
| 3414 | |
| 3415 | // Set JSArray map to global.regexp_result_map(). |
| 3416 | // Set empty properties FixedArray. |
| 3417 | // Set elements to point to FixedArray allocated right after the JSArray. |
| 3418 | // Interleave operations for better latency. |
| 3419 | __ mov(edx, ContextOperand(esi, Context::GLOBAL_INDEX)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3420 | Factory* factory = masm->isolate()->factory(); |
| 3421 | __ mov(ecx, Immediate(factory->empty_fixed_array())); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3422 | __ lea(ebx, Operand(eax, JSRegExpResult::kSize)); |
| 3423 | __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalContextOffset)); |
| 3424 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), ebx); |
| 3425 | __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), ecx); |
| 3426 | __ mov(edx, ContextOperand(edx, Context::REGEXP_RESULT_MAP_INDEX)); |
| 3427 | __ mov(FieldOperand(eax, HeapObject::kMapOffset), edx); |
| 3428 | |
| 3429 | // Set input, index and length fields from arguments. |
| 3430 | __ mov(ecx, Operand(esp, kPointerSize * 1)); |
| 3431 | __ mov(FieldOperand(eax, JSRegExpResult::kInputOffset), ecx); |
| 3432 | __ mov(ecx, Operand(esp, kPointerSize * 2)); |
| 3433 | __ mov(FieldOperand(eax, JSRegExpResult::kIndexOffset), ecx); |
| 3434 | __ mov(ecx, Operand(esp, kPointerSize * 3)); |
| 3435 | __ mov(FieldOperand(eax, JSArray::kLengthOffset), ecx); |
| 3436 | |
| 3437 | // Fill out the elements FixedArray. |
| 3438 | // eax: JSArray. |
| 3439 | // ebx: FixedArray. |
| 3440 | // ecx: Number of elements in array, as smi. |
| 3441 | |
| 3442 | // Set map. |
| 3443 | __ mov(FieldOperand(ebx, HeapObject::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3444 | Immediate(factory->fixed_array_map())); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3445 | // Set length. |
| 3446 | __ mov(FieldOperand(ebx, FixedArray::kLengthOffset), ecx); |
| 3447 | // Fill contents of fixed-array with the-hole. |
| 3448 | __ SmiUntag(ecx); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3449 | __ mov(edx, Immediate(factory->the_hole_value())); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3450 | __ lea(ebx, FieldOperand(ebx, FixedArray::kHeaderSize)); |
| 3451 | // Fill fixed array elements with hole. |
| 3452 | // eax: JSArray. |
| 3453 | // ecx: Number of elements to fill. |
| 3454 | // ebx: Start of elements in FixedArray. |
| 3455 | // edx: the hole. |
| 3456 | Label loop; |
| 3457 | __ test(ecx, Operand(ecx)); |
| 3458 | __ bind(&loop); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3459 | __ j(less_equal, &done, Label::kNear); // Jump if ecx is negative or zero. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3460 | __ sub(Operand(ecx), Immediate(1)); |
| 3461 | __ mov(Operand(ebx, ecx, times_pointer_size, 0), edx); |
| 3462 | __ jmp(&loop); |
| 3463 | |
| 3464 | __ bind(&done); |
| 3465 | __ ret(3 * kPointerSize); |
| 3466 | |
| 3467 | __ bind(&slowcase); |
| 3468 | __ TailCallRuntime(Runtime::kRegExpConstructResult, 3, 1); |
| 3469 | } |
| 3470 | |
| 3471 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3472 | void NumberToStringStub::GenerateLookupNumberStringCache(MacroAssembler* masm, |
| 3473 | Register object, |
| 3474 | Register result, |
| 3475 | Register scratch1, |
| 3476 | Register scratch2, |
| 3477 | bool object_is_smi, |
| 3478 | Label* not_found) { |
| 3479 | // Use of registers. Register result is used as a temporary. |
| 3480 | Register number_string_cache = result; |
| 3481 | Register mask = scratch1; |
| 3482 | Register scratch = scratch2; |
| 3483 | |
| 3484 | // Load the number string cache. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3485 | ExternalReference roots_address = |
| 3486 | ExternalReference::roots_address(masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3487 | __ mov(scratch, Immediate(Heap::kNumberStringCacheRootIndex)); |
| 3488 | __ mov(number_string_cache, |
| 3489 | Operand::StaticArray(scratch, times_pointer_size, roots_address)); |
| 3490 | // Make the hash mask from the length of the number string cache. It |
| 3491 | // contains two elements (number and string) for each cache entry. |
| 3492 | __ mov(mask, FieldOperand(number_string_cache, FixedArray::kLengthOffset)); |
| 3493 | __ shr(mask, kSmiTagSize + 1); // Untag length and divide it by two. |
| 3494 | __ sub(Operand(mask), Immediate(1)); // Make mask. |
| 3495 | |
| 3496 | // Calculate the entry in the number string cache. The hash value in the |
| 3497 | // number string cache for smis is just the smi value, and the hash for |
| 3498 | // doubles is the xor of the upper and lower words. See |
| 3499 | // Heap::GetNumberStringCache. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3500 | Label smi_hash_calculated; |
| 3501 | Label load_result_from_cache; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3502 | if (object_is_smi) { |
| 3503 | __ mov(scratch, object); |
| 3504 | __ SmiUntag(scratch); |
| 3505 | } else { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3506 | Label not_smi; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3507 | STATIC_ASSERT(kSmiTag == 0); |
| 3508 | __ test(object, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3509 | __ j(not_zero, ¬_smi, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3510 | __ mov(scratch, object); |
| 3511 | __ SmiUntag(scratch); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3512 | __ jmp(&smi_hash_calculated, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3513 | __ bind(¬_smi); |
| 3514 | __ cmp(FieldOperand(object, HeapObject::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3515 | masm->isolate()->factory()->heap_number_map()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3516 | __ j(not_equal, not_found); |
| 3517 | STATIC_ASSERT(8 == kDoubleSize); |
| 3518 | __ mov(scratch, FieldOperand(object, HeapNumber::kValueOffset)); |
| 3519 | __ xor_(scratch, FieldOperand(object, HeapNumber::kValueOffset + 4)); |
| 3520 | // Object is heap number and hash is now in scratch. Calculate cache index. |
| 3521 | __ and_(scratch, Operand(mask)); |
| 3522 | Register index = scratch; |
| 3523 | Register probe = mask; |
| 3524 | __ mov(probe, |
| 3525 | FieldOperand(number_string_cache, |
| 3526 | index, |
| 3527 | times_twice_pointer_size, |
| 3528 | FixedArray::kHeaderSize)); |
| 3529 | __ test(probe, Immediate(kSmiTagMask)); |
| 3530 | __ j(zero, not_found); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 3531 | if (CpuFeatures::IsSupported(SSE2)) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3532 | CpuFeatures::Scope fscope(SSE2); |
| 3533 | __ movdbl(xmm0, FieldOperand(object, HeapNumber::kValueOffset)); |
| 3534 | __ movdbl(xmm1, FieldOperand(probe, HeapNumber::kValueOffset)); |
| 3535 | __ ucomisd(xmm0, xmm1); |
| 3536 | } else { |
| 3537 | __ fld_d(FieldOperand(object, HeapNumber::kValueOffset)); |
| 3538 | __ fld_d(FieldOperand(probe, HeapNumber::kValueOffset)); |
| 3539 | __ FCmp(); |
| 3540 | } |
| 3541 | __ j(parity_even, not_found); // Bail out if NaN is involved. |
| 3542 | __ j(not_equal, not_found); // The cache did not contain this value. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3543 | __ jmp(&load_result_from_cache, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3544 | } |
| 3545 | |
| 3546 | __ bind(&smi_hash_calculated); |
| 3547 | // Object is smi and hash is now in scratch. Calculate cache index. |
| 3548 | __ and_(scratch, Operand(mask)); |
| 3549 | Register index = scratch; |
| 3550 | // Check if the entry is the smi we are looking for. |
| 3551 | __ cmp(object, |
| 3552 | FieldOperand(number_string_cache, |
| 3553 | index, |
| 3554 | times_twice_pointer_size, |
| 3555 | FixedArray::kHeaderSize)); |
| 3556 | __ j(not_equal, not_found); |
| 3557 | |
| 3558 | // Get the result from the cache. |
| 3559 | __ bind(&load_result_from_cache); |
| 3560 | __ mov(result, |
| 3561 | FieldOperand(number_string_cache, |
| 3562 | index, |
| 3563 | times_twice_pointer_size, |
| 3564 | FixedArray::kHeaderSize + kPointerSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3565 | Counters* counters = masm->isolate()->counters(); |
| 3566 | __ IncrementCounter(counters->number_to_string_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3567 | } |
| 3568 | |
| 3569 | |
| 3570 | void NumberToStringStub::Generate(MacroAssembler* masm) { |
| 3571 | Label runtime; |
| 3572 | |
| 3573 | __ mov(ebx, Operand(esp, kPointerSize)); |
| 3574 | |
| 3575 | // Generate code to lookup number in the number string cache. |
| 3576 | GenerateLookupNumberStringCache(masm, ebx, eax, ecx, edx, false, &runtime); |
| 3577 | __ ret(1 * kPointerSize); |
| 3578 | |
| 3579 | __ bind(&runtime); |
| 3580 | // Handle number to string in the runtime system if not found in the cache. |
| 3581 | __ TailCallRuntime(Runtime::kNumberToStringSkipCache, 1, 1); |
| 3582 | } |
| 3583 | |
| 3584 | |
| 3585 | static int NegativeComparisonResult(Condition cc) { |
| 3586 | ASSERT(cc != equal); |
| 3587 | ASSERT((cc == less) || (cc == less_equal) |
| 3588 | || (cc == greater) || (cc == greater_equal)); |
| 3589 | return (cc == greater || cc == greater_equal) ? LESS : GREATER; |
| 3590 | } |
| 3591 | |
| 3592 | void CompareStub::Generate(MacroAssembler* masm) { |
| 3593 | ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| 3594 | |
| 3595 | Label check_unequal_objects, done; |
| 3596 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3597 | // Compare two smis if required. |
| 3598 | if (include_smi_compare_) { |
| 3599 | Label non_smi, smi_done; |
| 3600 | __ mov(ecx, Operand(edx)); |
| 3601 | __ or_(ecx, Operand(eax)); |
| 3602 | __ test(ecx, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3603 | __ j(not_zero, &non_smi); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3604 | __ sub(edx, Operand(eax)); // Return on the result of the subtraction. |
| 3605 | __ j(no_overflow, &smi_done); |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 3606 | __ not_(edx); // Correct sign in case of overflow. edx is never 0 here. |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 3607 | __ bind(&smi_done); |
| 3608 | __ mov(eax, edx); |
| 3609 | __ ret(0); |
| 3610 | __ bind(&non_smi); |
| 3611 | } else if (FLAG_debug_code) { |
| 3612 | __ mov(ecx, Operand(edx)); |
| 3613 | __ or_(ecx, Operand(eax)); |
| 3614 | __ test(ecx, Immediate(kSmiTagMask)); |
| 3615 | __ Assert(not_zero, "Unexpected smi operands."); |
| 3616 | } |
| 3617 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3618 | // NOTICE! This code is only reached after a smi-fast-case check, so |
| 3619 | // it is certain that at least one operand isn't a smi. |
| 3620 | |
| 3621 | // Identical objects can be compared fast, but there are some tricky cases |
| 3622 | // for NaN and undefined. |
| 3623 | { |
| 3624 | Label not_identical; |
| 3625 | __ cmp(eax, Operand(edx)); |
| 3626 | __ j(not_equal, ¬_identical); |
| 3627 | |
| 3628 | if (cc_ != equal) { |
| 3629 | // Check for undefined. undefined OP undefined is false even though |
| 3630 | // undefined == undefined. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3631 | Label check_for_nan; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3632 | __ cmp(edx, masm->isolate()->factory()->undefined_value()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3633 | __ j(not_equal, &check_for_nan, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3634 | __ Set(eax, Immediate(Smi::FromInt(NegativeComparisonResult(cc_)))); |
| 3635 | __ ret(0); |
| 3636 | __ bind(&check_for_nan); |
| 3637 | } |
| 3638 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3639 | // 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] | 3640 | // so we do the second best thing - test it ourselves. |
| 3641 | // Note: if cc_ != equal, never_nan_nan_ is not used. |
| 3642 | if (never_nan_nan_ && (cc_ == equal)) { |
| 3643 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 3644 | __ ret(0); |
| 3645 | } else { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3646 | Label heap_number; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3647 | __ cmp(FieldOperand(edx, HeapObject::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3648 | Immediate(masm->isolate()->factory()->heap_number_map())); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3649 | __ j(equal, &heap_number, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3650 | if (cc_ != equal) { |
| 3651 | // Call runtime on identical JSObjects. Otherwise return equal. |
| 3652 | __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, ecx); |
| 3653 | __ j(above_equal, ¬_identical); |
| 3654 | } |
| 3655 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 3656 | __ ret(0); |
| 3657 | |
| 3658 | __ bind(&heap_number); |
| 3659 | // It is a heap number, so return non-equal if it's NaN and equal if |
| 3660 | // it's not NaN. |
| 3661 | // The representation of NaN values has all exponent bits (52..62) set, |
| 3662 | // and not all mantissa bits (0..51) clear. |
| 3663 | // We only accept QNaNs, which have bit 51 set. |
| 3664 | // Read top bits of double representation (second word of value). |
| 3665 | |
| 3666 | // Value is a QNaN if value & kQuietNaNMask == kQuietNaNMask, i.e., |
| 3667 | // all bits in the mask are set. We only need to check the word |
| 3668 | // that contains the exponent and high bit of the mantissa. |
| 3669 | STATIC_ASSERT(((kQuietNaNHighBitsMask << 1) & 0x80000000u) != 0); |
| 3670 | __ mov(edx, FieldOperand(edx, HeapNumber::kExponentOffset)); |
Steve Block | 9fac840 | 2011-05-12 15:51:54 +0100 | [diff] [blame] | 3671 | __ Set(eax, Immediate(0)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3672 | // Shift value and mask so kQuietNaNHighBitsMask applies to topmost |
| 3673 | // bits. |
| 3674 | __ add(edx, Operand(edx)); |
| 3675 | __ cmp(edx, kQuietNaNHighBitsMask << 1); |
| 3676 | if (cc_ == equal) { |
| 3677 | STATIC_ASSERT(EQUAL != 1); |
| 3678 | __ setcc(above_equal, eax); |
| 3679 | __ ret(0); |
| 3680 | } else { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3681 | Label nan; |
| 3682 | __ j(above_equal, &nan, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3683 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 3684 | __ ret(0); |
| 3685 | __ bind(&nan); |
| 3686 | __ Set(eax, Immediate(Smi::FromInt(NegativeComparisonResult(cc_)))); |
| 3687 | __ ret(0); |
| 3688 | } |
| 3689 | } |
| 3690 | |
| 3691 | __ bind(¬_identical); |
| 3692 | } |
| 3693 | |
| 3694 | // Strict equality can quickly decide whether objects are equal. |
| 3695 | // Non-strict object equality is slower, so it is handled later in the stub. |
| 3696 | if (cc_ == equal && strict_) { |
| 3697 | Label slow; // Fallthrough label. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3698 | Label not_smis; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3699 | // If we're doing a strict equality comparison, we don't have to do |
| 3700 | // type conversion, so we generate code to do fast comparison for objects |
| 3701 | // and oddballs. Non-smi numbers and strings still go through the usual |
| 3702 | // slow-case code. |
| 3703 | // If either is a Smi (we know that not both are), then they can only |
| 3704 | // be equal if the other is a HeapNumber. If so, use the slow case. |
| 3705 | STATIC_ASSERT(kSmiTag == 0); |
| 3706 | ASSERT_EQ(0, Smi::FromInt(0)); |
| 3707 | __ mov(ecx, Immediate(kSmiTagMask)); |
| 3708 | __ and_(ecx, Operand(eax)); |
| 3709 | __ test(ecx, Operand(edx)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3710 | __ j(not_zero, ¬_smis, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3711 | // One operand is a smi. |
| 3712 | |
| 3713 | // Check whether the non-smi is a heap number. |
| 3714 | STATIC_ASSERT(kSmiTagMask == 1); |
| 3715 | // ecx still holds eax & kSmiTag, which is either zero or one. |
| 3716 | __ sub(Operand(ecx), Immediate(0x01)); |
| 3717 | __ mov(ebx, edx); |
| 3718 | __ xor_(ebx, Operand(eax)); |
| 3719 | __ and_(ebx, Operand(ecx)); // ebx holds either 0 or eax ^ edx. |
| 3720 | __ xor_(ebx, Operand(eax)); |
| 3721 | // if eax was smi, ebx is now edx, else eax. |
| 3722 | |
| 3723 | // Check if the non-smi operand is a heap number. |
| 3724 | __ cmp(FieldOperand(ebx, HeapObject::kMapOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3725 | Immediate(masm->isolate()->factory()->heap_number_map())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3726 | // If heap number, handle it in the slow case. |
| 3727 | __ j(equal, &slow); |
| 3728 | // Return non-equal (ebx is not zero) |
| 3729 | __ mov(eax, ebx); |
| 3730 | __ ret(0); |
| 3731 | |
| 3732 | __ bind(¬_smis); |
| 3733 | // If either operand is a JSObject or an oddball value, then they are not |
| 3734 | // equal since their pointers are different |
| 3735 | // There is no test for undetectability in strict equality. |
| 3736 | |
| 3737 | // Get the type of the first operand. |
| 3738 | // If the first object is a JS object, we have done pointer comparison. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3739 | Label first_non_object; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3740 | STATIC_ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| 3741 | __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, ecx); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3742 | __ j(below, &first_non_object, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3743 | |
| 3744 | // Return non-zero (eax is not zero) |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3745 | Label return_not_equal; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3746 | STATIC_ASSERT(kHeapObjectTag != 0); |
| 3747 | __ bind(&return_not_equal); |
| 3748 | __ ret(0); |
| 3749 | |
| 3750 | __ bind(&first_non_object); |
| 3751 | // Check for oddballs: true, false, null, undefined. |
| 3752 | __ CmpInstanceType(ecx, ODDBALL_TYPE); |
| 3753 | __ j(equal, &return_not_equal); |
| 3754 | |
| 3755 | __ CmpObjectType(edx, FIRST_JS_OBJECT_TYPE, ecx); |
| 3756 | __ j(above_equal, &return_not_equal); |
| 3757 | |
| 3758 | // Check for oddballs: true, false, null, undefined. |
| 3759 | __ CmpInstanceType(ecx, ODDBALL_TYPE); |
| 3760 | __ j(equal, &return_not_equal); |
| 3761 | |
| 3762 | // Fall through to the general case. |
| 3763 | __ bind(&slow); |
| 3764 | } |
| 3765 | |
| 3766 | // Generate the number comparison code. |
| 3767 | if (include_number_compare_) { |
| 3768 | Label non_number_comparison; |
| 3769 | Label unordered; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 3770 | if (CpuFeatures::IsSupported(SSE2)) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3771 | CpuFeatures::Scope use_sse2(SSE2); |
| 3772 | CpuFeatures::Scope use_cmov(CMOV); |
| 3773 | |
| 3774 | FloatingPointHelper::LoadSSE2Operands(masm, &non_number_comparison); |
| 3775 | __ ucomisd(xmm0, xmm1); |
| 3776 | |
| 3777 | // Don't base result on EFLAGS when a NaN is involved. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3778 | __ j(parity_even, &unordered); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3779 | // Return a result of -1, 0, or 1, based on EFLAGS. |
| 3780 | __ mov(eax, 0); // equal |
| 3781 | __ mov(ecx, Immediate(Smi::FromInt(1))); |
| 3782 | __ cmov(above, eax, Operand(ecx)); |
| 3783 | __ mov(ecx, Immediate(Smi::FromInt(-1))); |
| 3784 | __ cmov(below, eax, Operand(ecx)); |
| 3785 | __ ret(0); |
| 3786 | } else { |
| 3787 | FloatingPointHelper::CheckFloatOperands( |
| 3788 | masm, &non_number_comparison, ebx); |
| 3789 | FloatingPointHelper::LoadFloatOperand(masm, eax); |
| 3790 | FloatingPointHelper::LoadFloatOperand(masm, edx); |
| 3791 | __ FCmp(); |
| 3792 | |
| 3793 | // Don't base result on EFLAGS when a NaN is involved. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3794 | __ j(parity_even, &unordered); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3795 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3796 | Label below_label, above_label; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3797 | // Return a result of -1, 0, or 1, based on EFLAGS. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3798 | __ j(below, &below_label); |
| 3799 | __ j(above, &above_label); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3800 | |
Steve Block | 9fac840 | 2011-05-12 15:51:54 +0100 | [diff] [blame] | 3801 | __ Set(eax, Immediate(0)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3802 | __ ret(0); |
| 3803 | |
| 3804 | __ bind(&below_label); |
| 3805 | __ mov(eax, Immediate(Smi::FromInt(-1))); |
| 3806 | __ ret(0); |
| 3807 | |
| 3808 | __ bind(&above_label); |
| 3809 | __ mov(eax, Immediate(Smi::FromInt(1))); |
| 3810 | __ ret(0); |
| 3811 | } |
| 3812 | |
| 3813 | // If one of the numbers was NaN, then the result is always false. |
| 3814 | // The cc is never not-equal. |
| 3815 | __ bind(&unordered); |
| 3816 | ASSERT(cc_ != not_equal); |
| 3817 | if (cc_ == less || cc_ == less_equal) { |
| 3818 | __ mov(eax, Immediate(Smi::FromInt(1))); |
| 3819 | } else { |
| 3820 | __ mov(eax, Immediate(Smi::FromInt(-1))); |
| 3821 | } |
| 3822 | __ ret(0); |
| 3823 | |
| 3824 | // The number comparison code did not provide a valid result. |
| 3825 | __ bind(&non_number_comparison); |
| 3826 | } |
| 3827 | |
| 3828 | // Fast negative check for symbol-to-symbol equality. |
| 3829 | Label check_for_strings; |
| 3830 | if (cc_ == equal) { |
| 3831 | BranchIfNonSymbol(masm, &check_for_strings, eax, ecx); |
| 3832 | BranchIfNonSymbol(masm, &check_for_strings, edx, ecx); |
| 3833 | |
| 3834 | // We've already checked for object identity, so if both operands |
| 3835 | // are symbols they aren't equal. Register eax already holds a |
| 3836 | // non-zero value, which indicates not equal, so just return. |
| 3837 | __ ret(0); |
| 3838 | } |
| 3839 | |
| 3840 | __ bind(&check_for_strings); |
| 3841 | |
| 3842 | __ JumpIfNotBothSequentialAsciiStrings(edx, eax, ecx, ebx, |
| 3843 | &check_unequal_objects); |
| 3844 | |
| 3845 | // Inline comparison of ascii strings. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3846 | if (cc_ == equal) { |
| 3847 | StringCompareStub::GenerateFlatAsciiStringEquals(masm, |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3848 | edx, |
| 3849 | eax, |
| 3850 | ecx, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3851 | ebx); |
| 3852 | } else { |
| 3853 | StringCompareStub::GenerateCompareFlatAsciiStrings(masm, |
| 3854 | edx, |
| 3855 | eax, |
| 3856 | ecx, |
| 3857 | ebx, |
| 3858 | edi); |
| 3859 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3860 | #ifdef DEBUG |
| 3861 | __ Abort("Unexpected fall-through from string comparison"); |
| 3862 | #endif |
| 3863 | |
| 3864 | __ bind(&check_unequal_objects); |
| 3865 | if (cc_ == equal && !strict_) { |
| 3866 | // Non-strict equality. Objects are unequal if |
| 3867 | // they are both JSObjects and not undetectable, |
| 3868 | // and their pointers are different. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3869 | Label not_both_objects; |
| 3870 | Label return_unequal; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3871 | // At most one is a smi, so we can test for smi by adding the two. |
| 3872 | // A smi plus a heap object has the low bit set, a heap object plus |
| 3873 | // a heap object has the low bit clear. |
| 3874 | STATIC_ASSERT(kSmiTag == 0); |
| 3875 | STATIC_ASSERT(kSmiTagMask == 1); |
| 3876 | __ lea(ecx, Operand(eax, edx, times_1, 0)); |
| 3877 | __ test(ecx, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3878 | __ j(not_zero, ¬_both_objects, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3879 | __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, ecx); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3880 | __ j(below, ¬_both_objects, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3881 | __ CmpObjectType(edx, FIRST_JS_OBJECT_TYPE, ebx); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3882 | __ j(below, ¬_both_objects, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3883 | // We do not bail out after this point. Both are JSObjects, and |
| 3884 | // they are equal if and only if both are undetectable. |
| 3885 | // The and of the undetectable flags is 1 if and only if they are equal. |
| 3886 | __ test_b(FieldOperand(ecx, Map::kBitFieldOffset), |
| 3887 | 1 << Map::kIsUndetectable); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3888 | __ j(zero, &return_unequal, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3889 | __ test_b(FieldOperand(ebx, Map::kBitFieldOffset), |
| 3890 | 1 << Map::kIsUndetectable); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3891 | __ j(zero, &return_unequal, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3892 | // The objects are both undetectable, so they both compare as the value |
| 3893 | // undefined, and are equal. |
| 3894 | __ Set(eax, Immediate(EQUAL)); |
| 3895 | __ bind(&return_unequal); |
| 3896 | // Return non-equal by returning the non-zero object pointer in eax, |
| 3897 | // or return equal if we fell through to here. |
| 3898 | __ ret(0); // rax, rdx were pushed |
| 3899 | __ bind(¬_both_objects); |
| 3900 | } |
| 3901 | |
| 3902 | // Push arguments below the return address. |
| 3903 | __ pop(ecx); |
| 3904 | __ push(edx); |
| 3905 | __ push(eax); |
| 3906 | |
| 3907 | // Figure out which native to call and setup the arguments. |
| 3908 | Builtins::JavaScript builtin; |
| 3909 | if (cc_ == equal) { |
| 3910 | builtin = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS; |
| 3911 | } else { |
| 3912 | builtin = Builtins::COMPARE; |
| 3913 | __ push(Immediate(Smi::FromInt(NegativeComparisonResult(cc_)))); |
| 3914 | } |
| 3915 | |
| 3916 | // Restore return address on the stack. |
| 3917 | __ push(ecx); |
| 3918 | |
| 3919 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 3920 | // tagged as a small integer. |
| 3921 | __ InvokeBuiltin(builtin, JUMP_FUNCTION); |
| 3922 | } |
| 3923 | |
| 3924 | |
| 3925 | void CompareStub::BranchIfNonSymbol(MacroAssembler* masm, |
| 3926 | Label* label, |
| 3927 | Register object, |
| 3928 | Register scratch) { |
| 3929 | __ test(object, Immediate(kSmiTagMask)); |
| 3930 | __ j(zero, label); |
| 3931 | __ mov(scratch, FieldOperand(object, HeapObject::kMapOffset)); |
| 3932 | __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset)); |
| 3933 | __ and_(scratch, kIsSymbolMask | kIsNotStringMask); |
| 3934 | __ cmp(scratch, kSymbolTag | kStringTag); |
| 3935 | __ j(not_equal, label); |
| 3936 | } |
| 3937 | |
| 3938 | |
| 3939 | void StackCheckStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 3940 | __ TailCallRuntime(Runtime::kStackGuard, 0, 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3941 | } |
| 3942 | |
| 3943 | |
| 3944 | void CallFunctionStub::Generate(MacroAssembler* masm) { |
| 3945 | Label slow; |
| 3946 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3947 | // The receiver might implicitly be the global object. This is |
| 3948 | // indicated by passing the hole as the receiver to the call |
| 3949 | // function stub. |
| 3950 | if (ReceiverMightBeImplicit()) { |
| 3951 | Label call; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3952 | // Get the receiver from the stack. |
| 3953 | // +1 ~ return address |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3954 | __ mov(eax, Operand(esp, (argc_ + 1) * kPointerSize)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3955 | // Call as function is indicated with the hole. |
| 3956 | __ cmp(eax, masm->isolate()->factory()->the_hole_value()); |
| 3957 | __ j(not_equal, &call, Label::kNear); |
| 3958 | // Patch the receiver on the stack with the global receiver object. |
| 3959 | __ mov(ebx, GlobalObjectOperand()); |
| 3960 | __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset)); |
| 3961 | __ mov(Operand(esp, (argc_ + 1) * kPointerSize), ebx); |
| 3962 | __ bind(&call); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3963 | } |
| 3964 | |
| 3965 | // Get the function to call from the stack. |
| 3966 | // +2 ~ receiver, return address |
| 3967 | __ mov(edi, Operand(esp, (argc_ + 2) * kPointerSize)); |
| 3968 | |
| 3969 | // Check that the function really is a JavaScript function. |
| 3970 | __ test(edi, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3971 | __ j(zero, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3972 | // Goto slow case if we do not have a function. |
| 3973 | __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3974 | __ j(not_equal, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3975 | |
| 3976 | // Fast-case: Just invoke the function. |
| 3977 | ParameterCount actual(argc_); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 3978 | |
| 3979 | if (ReceiverMightBeImplicit()) { |
| 3980 | Label call_as_function; |
| 3981 | __ cmp(eax, masm->isolate()->factory()->the_hole_value()); |
| 3982 | __ j(equal, &call_as_function); |
| 3983 | __ InvokeFunction(edi, |
| 3984 | actual, |
| 3985 | JUMP_FUNCTION, |
| 3986 | NullCallWrapper(), |
| 3987 | CALL_AS_METHOD); |
| 3988 | __ bind(&call_as_function); |
| 3989 | } |
| 3990 | __ InvokeFunction(edi, |
| 3991 | actual, |
| 3992 | JUMP_FUNCTION, |
| 3993 | NullCallWrapper(), |
| 3994 | CALL_AS_FUNCTION); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3995 | |
| 3996 | // Slow-case: Non-function called. |
| 3997 | __ bind(&slow); |
| 3998 | // CALL_NON_FUNCTION expects the non-function callee as receiver (instead |
| 3999 | // of the original receiver from the call site). |
| 4000 | __ mov(Operand(esp, (argc_ + 1) * kPointerSize), edi); |
| 4001 | __ Set(eax, Immediate(argc_)); |
| 4002 | __ Set(ebx, Immediate(0)); |
| 4003 | __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4004 | Handle<Code> adaptor = |
| 4005 | masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4006 | __ jmp(adaptor, RelocInfo::CODE_TARGET); |
| 4007 | } |
| 4008 | |
| 4009 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4010 | bool CEntryStub::NeedsImmovableCode() { |
| 4011 | return false; |
| 4012 | } |
| 4013 | |
| 4014 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4015 | void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 4016 | __ Throw(eax); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4017 | } |
| 4018 | |
| 4019 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4020 | void CEntryStub::GenerateCore(MacroAssembler* masm, |
| 4021 | Label* throw_normal_exception, |
| 4022 | Label* throw_termination_exception, |
| 4023 | Label* throw_out_of_memory_exception, |
| 4024 | bool do_gc, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4025 | bool always_allocate_scope) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4026 | // eax: result parameter for PerformGC, if any |
| 4027 | // ebx: pointer to C function (C callee-saved) |
| 4028 | // ebp: frame pointer (restored after C call) |
| 4029 | // esp: stack pointer (restored after C call) |
| 4030 | // edi: number of arguments including receiver (C callee-saved) |
| 4031 | // esi: pointer to the first argument (C callee-saved) |
| 4032 | |
| 4033 | // Result returned in eax, or eax+edx if result_size_ is 2. |
| 4034 | |
| 4035 | // Check stack alignment. |
| 4036 | if (FLAG_debug_code) { |
| 4037 | __ CheckStackAlignment(); |
| 4038 | } |
| 4039 | |
| 4040 | if (do_gc) { |
| 4041 | // Pass failure code returned from last attempt as first argument to |
| 4042 | // PerformGC. No need to use PrepareCallCFunction/CallCFunction here as the |
| 4043 | // stack alignment is known to be correct. This function takes one argument |
| 4044 | // which is passed on the stack, and we know that the stack has been |
| 4045 | // prepared to pass at least one argument. |
| 4046 | __ mov(Operand(esp, 0 * kPointerSize), eax); // Result. |
| 4047 | __ call(FUNCTION_ADDR(Runtime::PerformGC), RelocInfo::RUNTIME_ENTRY); |
| 4048 | } |
| 4049 | |
| 4050 | ExternalReference scope_depth = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4051 | ExternalReference::heap_always_allocate_scope_depth(masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4052 | if (always_allocate_scope) { |
| 4053 | __ inc(Operand::StaticVariable(scope_depth)); |
| 4054 | } |
| 4055 | |
| 4056 | // Call C function. |
| 4057 | __ mov(Operand(esp, 0 * kPointerSize), edi); // argc. |
| 4058 | __ mov(Operand(esp, 1 * kPointerSize), esi); // argv. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4059 | __ mov(Operand(esp, 2 * kPointerSize), |
| 4060 | Immediate(ExternalReference::isolate_address())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4061 | __ call(Operand(ebx)); |
| 4062 | // Result is in eax or edx:eax - do not destroy these registers! |
| 4063 | |
| 4064 | if (always_allocate_scope) { |
| 4065 | __ dec(Operand::StaticVariable(scope_depth)); |
| 4066 | } |
| 4067 | |
| 4068 | // Make sure we're not trying to return 'the hole' from the runtime |
| 4069 | // call as this may lead to crashes in the IC code later. |
| 4070 | if (FLAG_debug_code) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4071 | Label okay; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4072 | __ cmp(eax, masm->isolate()->factory()->the_hole_value()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4073 | __ j(not_equal, &okay, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4074 | __ int3(); |
| 4075 | __ bind(&okay); |
| 4076 | } |
| 4077 | |
| 4078 | // Check for failure result. |
| 4079 | Label failure_returned; |
| 4080 | STATIC_ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
| 4081 | __ lea(ecx, Operand(eax, 1)); |
| 4082 | // Lower 2 bits of ecx are 0 iff eax has failure tag. |
| 4083 | __ test(ecx, Immediate(kFailureTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4084 | __ j(zero, &failure_returned); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4085 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4086 | ExternalReference pending_exception_address( |
| 4087 | Isolate::k_pending_exception_address, masm->isolate()); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4088 | |
| 4089 | // Check that there is no pending exception, otherwise we |
| 4090 | // should have returned some failure value. |
| 4091 | if (FLAG_debug_code) { |
| 4092 | __ push(edx); |
| 4093 | __ mov(edx, Operand::StaticVariable( |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4094 | ExternalReference::the_hole_value_location(masm->isolate()))); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4095 | Label okay; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4096 | __ cmp(edx, Operand::StaticVariable(pending_exception_address)); |
| 4097 | // Cannot use check here as it attempts to generate call into runtime. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4098 | __ j(equal, &okay, Label::kNear); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 4099 | __ int3(); |
| 4100 | __ bind(&okay); |
| 4101 | __ pop(edx); |
| 4102 | } |
| 4103 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4104 | // Exit the JavaScript to C++ exit frame. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4105 | __ LeaveExitFrame(save_doubles_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4106 | __ ret(0); |
| 4107 | |
| 4108 | // Handling of failure. |
| 4109 | __ bind(&failure_returned); |
| 4110 | |
| 4111 | Label retry; |
| 4112 | // If the returned exception is RETRY_AFTER_GC continue at retry label |
| 4113 | STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0); |
| 4114 | __ test(eax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4115 | __ j(zero, &retry); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4116 | |
| 4117 | // Special handling of out of memory exceptions. |
| 4118 | __ cmp(eax, reinterpret_cast<int32_t>(Failure::OutOfMemoryException())); |
| 4119 | __ j(equal, throw_out_of_memory_exception); |
| 4120 | |
| 4121 | // Retrieve the pending exception and clear the variable. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4122 | ExternalReference the_hole_location = |
| 4123 | ExternalReference::the_hole_value_location(masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4124 | __ mov(eax, Operand::StaticVariable(pending_exception_address)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4125 | __ mov(edx, Operand::StaticVariable(the_hole_location)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4126 | __ mov(Operand::StaticVariable(pending_exception_address), edx); |
| 4127 | |
| 4128 | // Special handling of termination exceptions which are uncatchable |
| 4129 | // by javascript code. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4130 | __ cmp(eax, masm->isolate()->factory()->termination_exception()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4131 | __ j(equal, throw_termination_exception); |
| 4132 | |
| 4133 | // Handle normal exception. |
| 4134 | __ jmp(throw_normal_exception); |
| 4135 | |
| 4136 | // Retry. |
| 4137 | __ bind(&retry); |
| 4138 | } |
| 4139 | |
| 4140 | |
| 4141 | void CEntryStub::GenerateThrowUncatchable(MacroAssembler* masm, |
| 4142 | UncatchableExceptionType type) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 4143 | __ ThrowUncatchable(type, eax); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4144 | } |
| 4145 | |
| 4146 | |
| 4147 | void CEntryStub::Generate(MacroAssembler* masm) { |
| 4148 | // eax: number of arguments including receiver |
| 4149 | // ebx: pointer to C function (C callee-saved) |
| 4150 | // ebp: frame pointer (restored after C call) |
| 4151 | // esp: stack pointer (restored after C call) |
| 4152 | // esi: current context (C callee-saved) |
| 4153 | // edi: JS function of the caller (C callee-saved) |
| 4154 | |
| 4155 | // NOTE: Invocations of builtins may return failure objects instead |
| 4156 | // of a proper result. The builtin entry handles this by performing |
| 4157 | // a garbage collection and retrying the builtin (twice). |
| 4158 | |
| 4159 | // Enter the exit frame that transitions from JavaScript to C++. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4160 | __ EnterExitFrame(save_doubles_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4161 | |
| 4162 | // eax: result parameter for PerformGC, if any (setup below) |
| 4163 | // ebx: pointer to builtin function (C callee-saved) |
| 4164 | // ebp: frame pointer (restored after C call) |
| 4165 | // esp: stack pointer (restored after C call) |
| 4166 | // edi: number of arguments including receiver (C callee-saved) |
| 4167 | // esi: argv pointer (C callee-saved) |
| 4168 | |
| 4169 | Label throw_normal_exception; |
| 4170 | Label throw_termination_exception; |
| 4171 | Label throw_out_of_memory_exception; |
| 4172 | |
| 4173 | // Call into the runtime system. |
| 4174 | GenerateCore(masm, |
| 4175 | &throw_normal_exception, |
| 4176 | &throw_termination_exception, |
| 4177 | &throw_out_of_memory_exception, |
| 4178 | false, |
| 4179 | false); |
| 4180 | |
| 4181 | // Do space-specific GC and retry runtime call. |
| 4182 | GenerateCore(masm, |
| 4183 | &throw_normal_exception, |
| 4184 | &throw_termination_exception, |
| 4185 | &throw_out_of_memory_exception, |
| 4186 | true, |
| 4187 | false); |
| 4188 | |
| 4189 | // Do full GC and retry runtime call one final time. |
| 4190 | Failure* failure = Failure::InternalError(); |
| 4191 | __ mov(eax, Immediate(reinterpret_cast<int32_t>(failure))); |
| 4192 | GenerateCore(masm, |
| 4193 | &throw_normal_exception, |
| 4194 | &throw_termination_exception, |
| 4195 | &throw_out_of_memory_exception, |
| 4196 | true, |
| 4197 | true); |
| 4198 | |
| 4199 | __ bind(&throw_out_of_memory_exception); |
| 4200 | GenerateThrowUncatchable(masm, OUT_OF_MEMORY); |
| 4201 | |
| 4202 | __ bind(&throw_termination_exception); |
| 4203 | GenerateThrowUncatchable(masm, TERMINATION); |
| 4204 | |
| 4205 | __ bind(&throw_normal_exception); |
| 4206 | GenerateThrowTOS(masm); |
| 4207 | } |
| 4208 | |
| 4209 | |
| 4210 | void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) { |
| 4211 | Label invoke, exit; |
| 4212 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 4213 | Label not_outermost_js, not_outermost_js_2; |
| 4214 | #endif |
| 4215 | |
| 4216 | // Setup frame. |
| 4217 | __ push(ebp); |
| 4218 | __ mov(ebp, Operand(esp)); |
| 4219 | |
| 4220 | // Push marker in two places. |
| 4221 | int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY; |
| 4222 | __ push(Immediate(Smi::FromInt(marker))); // context slot |
| 4223 | __ push(Immediate(Smi::FromInt(marker))); // function slot |
| 4224 | // Save callee-saved registers (C calling conventions). |
| 4225 | __ push(edi); |
| 4226 | __ push(esi); |
| 4227 | __ push(ebx); |
| 4228 | |
| 4229 | // Save copies of the top frame descriptor on the stack. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4230 | ExternalReference c_entry_fp(Isolate::k_c_entry_fp_address, masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4231 | __ push(Operand::StaticVariable(c_entry_fp)); |
| 4232 | |
| 4233 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 4234 | // If this is the outermost JS call, set js_entry_sp value. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4235 | ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address, |
| 4236 | masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4237 | __ cmp(Operand::StaticVariable(js_entry_sp), Immediate(0)); |
| 4238 | __ j(not_equal, ¬_outermost_js); |
| 4239 | __ mov(Operand::StaticVariable(js_entry_sp), ebp); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 4240 | __ push(Immediate(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
| 4241 | Label cont; |
| 4242 | __ jmp(&cont); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4243 | __ bind(¬_outermost_js); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 4244 | __ push(Immediate(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME))); |
| 4245 | __ bind(&cont); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4246 | #endif |
| 4247 | |
| 4248 | // Call a faked try-block that does the invoke. |
| 4249 | __ call(&invoke); |
| 4250 | |
| 4251 | // Caught exception: Store result (exception) in the pending |
| 4252 | // exception field in the JSEnv and return a failure sentinel. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4253 | ExternalReference pending_exception(Isolate::k_pending_exception_address, |
| 4254 | masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4255 | __ mov(Operand::StaticVariable(pending_exception), eax); |
| 4256 | __ mov(eax, reinterpret_cast<int32_t>(Failure::Exception())); |
| 4257 | __ jmp(&exit); |
| 4258 | |
| 4259 | // Invoke: Link this frame into the handler chain. |
| 4260 | __ bind(&invoke); |
| 4261 | __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); |
| 4262 | |
| 4263 | // Clear any pending exceptions. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4264 | ExternalReference the_hole_location = |
| 4265 | ExternalReference::the_hole_value_location(masm->isolate()); |
| 4266 | __ mov(edx, Operand::StaticVariable(the_hole_location)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4267 | __ mov(Operand::StaticVariable(pending_exception), edx); |
| 4268 | |
| 4269 | // Fake a receiver (NULL). |
| 4270 | __ push(Immediate(0)); // receiver |
| 4271 | |
| 4272 | // Invoke the function by calling through JS entry trampoline |
| 4273 | // builtin and pop the faked function when we return. Notice that we |
| 4274 | // cannot store a reference to the trampoline code directly in this |
| 4275 | // stub, because the builtin stubs may not have been generated yet. |
| 4276 | if (is_construct) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4277 | ExternalReference construct_entry( |
| 4278 | Builtins::kJSConstructEntryTrampoline, |
| 4279 | masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4280 | __ mov(edx, Immediate(construct_entry)); |
| 4281 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4282 | ExternalReference entry(Builtins::kJSEntryTrampoline, |
| 4283 | masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4284 | __ mov(edx, Immediate(entry)); |
| 4285 | } |
| 4286 | __ mov(edx, Operand(edx, 0)); // deref address |
| 4287 | __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); |
| 4288 | __ call(Operand(edx)); |
| 4289 | |
| 4290 | // Unlink this frame from the handler chain. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 4291 | __ PopTryHandler(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4292 | |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 4293 | __ bind(&exit); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4294 | #ifdef ENABLE_LOGGING_AND_PROFILING |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 4295 | // Check if the current stack frame is marked as the outermost JS frame. |
| 4296 | __ pop(ebx); |
| 4297 | __ cmp(Operand(ebx), |
| 4298 | Immediate(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4299 | __ j(not_equal, ¬_outermost_js_2); |
| 4300 | __ mov(Operand::StaticVariable(js_entry_sp), Immediate(0)); |
| 4301 | __ bind(¬_outermost_js_2); |
| 4302 | #endif |
| 4303 | |
| 4304 | // Restore the top frame descriptor from the stack. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4305 | __ pop(Operand::StaticVariable(ExternalReference( |
| 4306 | Isolate::k_c_entry_fp_address, |
| 4307 | masm->isolate()))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4308 | |
| 4309 | // Restore callee-saved registers (C calling conventions). |
| 4310 | __ pop(ebx); |
| 4311 | __ pop(esi); |
| 4312 | __ pop(edi); |
| 4313 | __ add(Operand(esp), Immediate(2 * kPointerSize)); // remove markers |
| 4314 | |
| 4315 | // Restore frame pointer and return. |
| 4316 | __ pop(ebp); |
| 4317 | __ ret(0); |
| 4318 | } |
| 4319 | |
| 4320 | |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4321 | // Generate stub code for instanceof. |
| 4322 | // This code can patch a call site inlined cache of the instance of check, |
| 4323 | // which looks like this. |
| 4324 | // |
| 4325 | // 81 ff XX XX XX XX cmp edi, <the hole, patched to a map> |
| 4326 | // 75 0a jne <some near label> |
| 4327 | // b8 XX XX XX XX mov eax, <the hole, patched to either true or false> |
| 4328 | // |
| 4329 | // If call site patching is requested the stack will have the delta from the |
| 4330 | // return address to the cmp instruction just below the return address. This |
| 4331 | // also means that call site patching can only take place with arguments in |
| 4332 | // registers. TOS looks like this when call site patching is requested |
| 4333 | // |
| 4334 | // esp[0] : return address |
| 4335 | // esp[4] : delta from return address to cmp instruction |
| 4336 | // |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4337 | void InstanceofStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4338 | // Call site inlining and patching implies arguments in registers. |
| 4339 | ASSERT(HasArgsInRegisters() || !HasCallSiteInlineCheck()); |
| 4340 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4341 | // Fixed register usage throughout the stub. |
| 4342 | Register object = eax; // Object (lhs). |
| 4343 | Register map = ebx; // Map of the object. |
| 4344 | Register function = edx; // Function (rhs). |
| 4345 | Register prototype = edi; // Prototype of the function. |
| 4346 | Register scratch = ecx; |
| 4347 | |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4348 | // Constants describing the call site code to patch. |
| 4349 | static const int kDeltaToCmpImmediate = 2; |
| 4350 | static const int kDeltaToMov = 8; |
| 4351 | static const int kDeltaToMovImmediate = 9; |
| 4352 | static const int8_t kCmpEdiImmediateByte1 = BitCast<int8_t, uint8_t>(0x81); |
| 4353 | static const int8_t kCmpEdiImmediateByte2 = BitCast<int8_t, uint8_t>(0xff); |
| 4354 | static const int8_t kMovEaxImmediateByte = BitCast<int8_t, uint8_t>(0xb8); |
| 4355 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4356 | ExternalReference roots_address = |
| 4357 | ExternalReference::roots_address(masm->isolate()); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4358 | |
| 4359 | ASSERT_EQ(object.code(), InstanceofStub::left().code()); |
| 4360 | ASSERT_EQ(function.code(), InstanceofStub::right().code()); |
| 4361 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4362 | // Get the object and function - they are always both needed. |
| 4363 | Label slow, not_js_object; |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4364 | if (!HasArgsInRegisters()) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4365 | __ mov(object, Operand(esp, 2 * kPointerSize)); |
| 4366 | __ mov(function, Operand(esp, 1 * kPointerSize)); |
| 4367 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4368 | |
| 4369 | // Check that the left hand is a JS object. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4370 | __ test(object, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4371 | __ j(zero, ¬_js_object); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4372 | __ IsObjectJSObjectType(object, map, scratch, ¬_js_object); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4373 | |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4374 | // If there is a call site cache don't look in the global cache, but do the |
| 4375 | // real lookup and update the call site cache. |
| 4376 | if (!HasCallSiteInlineCheck()) { |
| 4377 | // Look up the function and the map in the instanceof cache. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4378 | Label miss; |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4379 | __ mov(scratch, Immediate(Heap::kInstanceofCacheFunctionRootIndex)); |
| 4380 | __ cmp(function, |
| 4381 | Operand::StaticArray(scratch, times_pointer_size, roots_address)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4382 | __ j(not_equal, &miss, Label::kNear); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4383 | __ mov(scratch, Immediate(Heap::kInstanceofCacheMapRootIndex)); |
| 4384 | __ cmp(map, Operand::StaticArray( |
| 4385 | scratch, times_pointer_size, roots_address)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4386 | __ j(not_equal, &miss, Label::kNear); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4387 | __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex)); |
| 4388 | __ mov(eax, Operand::StaticArray( |
| 4389 | scratch, times_pointer_size, roots_address)); |
| 4390 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
| 4391 | __ bind(&miss); |
| 4392 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4393 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4394 | // Get the prototype of the function. |
| 4395 | __ TryGetFunctionPrototype(function, prototype, scratch, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4396 | |
| 4397 | // Check that the function prototype is a JS object. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4398 | __ test(prototype, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4399 | __ j(zero, &slow); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4400 | __ IsObjectJSObjectType(prototype, scratch, scratch, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4401 | |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4402 | // Update the global instanceof or call site inlined cache with the current |
| 4403 | // map and function. The cached answer will be set when it is known below. |
| 4404 | if (!HasCallSiteInlineCheck()) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4405 | __ mov(scratch, Immediate(Heap::kInstanceofCacheMapRootIndex)); |
| 4406 | __ mov(Operand::StaticArray(scratch, times_pointer_size, roots_address), map); |
| 4407 | __ mov(scratch, Immediate(Heap::kInstanceofCacheFunctionRootIndex)); |
| 4408 | __ mov(Operand::StaticArray(scratch, times_pointer_size, roots_address), |
| 4409 | function); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4410 | } else { |
| 4411 | // The constants for the code patching are based on no push instructions |
| 4412 | // at the call site. |
| 4413 | ASSERT(HasArgsInRegisters()); |
| 4414 | // Get return address and delta to inlined map check. |
| 4415 | __ mov(scratch, Operand(esp, 0 * kPointerSize)); |
| 4416 | __ sub(scratch, Operand(esp, 1 * kPointerSize)); |
| 4417 | if (FLAG_debug_code) { |
| 4418 | __ cmpb(Operand(scratch, 0), kCmpEdiImmediateByte1); |
| 4419 | __ Assert(equal, "InstanceofStub unexpected call site cache (cmp 1)"); |
| 4420 | __ cmpb(Operand(scratch, 1), kCmpEdiImmediateByte2); |
| 4421 | __ Assert(equal, "InstanceofStub unexpected call site cache (cmp 2)"); |
| 4422 | } |
| 4423 | __ mov(Operand(scratch, kDeltaToCmpImmediate), map); |
| 4424 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4425 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4426 | // Loop through the prototype chain of the object looking for the function |
| 4427 | // prototype. |
| 4428 | __ mov(scratch, FieldOperand(map, Map::kPrototypeOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4429 | Label loop, is_instance, is_not_instance; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4430 | __ bind(&loop); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4431 | __ cmp(scratch, Operand(prototype)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4432 | __ j(equal, &is_instance, Label::kNear); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4433 | Factory* factory = masm->isolate()->factory(); |
| 4434 | __ cmp(Operand(scratch), Immediate(factory->null_value())); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4435 | __ j(equal, &is_not_instance, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4436 | __ mov(scratch, FieldOperand(scratch, HeapObject::kMapOffset)); |
| 4437 | __ mov(scratch, FieldOperand(scratch, Map::kPrototypeOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4438 | __ jmp(&loop); |
| 4439 | |
| 4440 | __ bind(&is_instance); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4441 | if (!HasCallSiteInlineCheck()) { |
| 4442 | __ Set(eax, Immediate(0)); |
| 4443 | __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex)); |
| 4444 | __ mov(Operand::StaticArray(scratch, |
| 4445 | times_pointer_size, roots_address), eax); |
| 4446 | } else { |
| 4447 | // Get return address and delta to inlined map check. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4448 | __ mov(eax, factory->true_value()); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4449 | __ mov(scratch, Operand(esp, 0 * kPointerSize)); |
| 4450 | __ sub(scratch, Operand(esp, 1 * kPointerSize)); |
| 4451 | if (FLAG_debug_code) { |
| 4452 | __ cmpb(Operand(scratch, kDeltaToMov), kMovEaxImmediateByte); |
| 4453 | __ Assert(equal, "InstanceofStub unexpected call site cache (mov)"); |
| 4454 | } |
| 4455 | __ mov(Operand(scratch, kDeltaToMovImmediate), eax); |
| 4456 | if (!ReturnTrueFalseObject()) { |
| 4457 | __ Set(eax, Immediate(0)); |
| 4458 | } |
| 4459 | } |
| 4460 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4461 | |
| 4462 | __ bind(&is_not_instance); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4463 | if (!HasCallSiteInlineCheck()) { |
| 4464 | __ Set(eax, Immediate(Smi::FromInt(1))); |
| 4465 | __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex)); |
| 4466 | __ mov(Operand::StaticArray( |
| 4467 | scratch, times_pointer_size, roots_address), eax); |
| 4468 | } else { |
| 4469 | // Get return address and delta to inlined map check. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4470 | __ mov(eax, factory->false_value()); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4471 | __ mov(scratch, Operand(esp, 0 * kPointerSize)); |
| 4472 | __ sub(scratch, Operand(esp, 1 * kPointerSize)); |
| 4473 | if (FLAG_debug_code) { |
| 4474 | __ cmpb(Operand(scratch, kDeltaToMov), kMovEaxImmediateByte); |
| 4475 | __ Assert(equal, "InstanceofStub unexpected call site cache (mov)"); |
| 4476 | } |
| 4477 | __ mov(Operand(scratch, kDeltaToMovImmediate), eax); |
| 4478 | if (!ReturnTrueFalseObject()) { |
| 4479 | __ Set(eax, Immediate(Smi::FromInt(1))); |
| 4480 | } |
| 4481 | } |
| 4482 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4483 | |
| 4484 | Label object_not_null, object_not_null_or_smi; |
| 4485 | __ bind(¬_js_object); |
| 4486 | // Before null, smi and string value checks, check that the rhs is a function |
| 4487 | // as for a non-function rhs an exception needs to be thrown. |
| 4488 | __ test(function, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4489 | __ j(zero, &slow); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4490 | __ CmpObjectType(function, JS_FUNCTION_TYPE, scratch); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4491 | __ j(not_equal, &slow); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4492 | |
| 4493 | // Null is not instance of anything. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4494 | __ cmp(object, factory->null_value()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4495 | __ j(not_equal, &object_not_null); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4496 | __ Set(eax, Immediate(Smi::FromInt(1))); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4497 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4498 | |
| 4499 | __ bind(&object_not_null); |
| 4500 | // Smi values is not instance of anything. |
| 4501 | __ test(object, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4502 | __ j(not_zero, &object_not_null_or_smi); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4503 | __ Set(eax, Immediate(Smi::FromInt(1))); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4504 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4505 | |
| 4506 | __ bind(&object_not_null_or_smi); |
| 4507 | // String values is not instance of anything. |
| 4508 | Condition is_string = masm->IsObjectStringType(object, scratch, scratch); |
| 4509 | __ j(NegateCondition(is_string), &slow); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4510 | __ Set(eax, Immediate(Smi::FromInt(1))); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4511 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4512 | |
| 4513 | // Slow-case: Go through the JavaScript implementation. |
| 4514 | __ bind(&slow); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4515 | if (!ReturnTrueFalseObject()) { |
| 4516 | // Tail call the builtin which returns 0 or 1. |
| 4517 | if (HasArgsInRegisters()) { |
| 4518 | // Push arguments below return address. |
| 4519 | __ pop(scratch); |
| 4520 | __ push(object); |
| 4521 | __ push(function); |
| 4522 | __ push(scratch); |
| 4523 | } |
| 4524 | __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION); |
| 4525 | } else { |
| 4526 | // Call the builtin and convert 0/1 to true/false. |
| 4527 | __ EnterInternalFrame(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4528 | __ push(object); |
| 4529 | __ push(function); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4530 | __ InvokeBuiltin(Builtins::INSTANCE_OF, CALL_FUNCTION); |
| 4531 | __ LeaveInternalFrame(); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4532 | Label true_value, done; |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4533 | __ test(eax, Operand(eax)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4534 | __ j(zero, &true_value, Label::kNear); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4535 | __ mov(eax, factory->false_value()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4536 | __ jmp(&done, Label::kNear); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4537 | __ bind(&true_value); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4538 | __ mov(eax, factory->true_value()); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4539 | __ bind(&done); |
| 4540 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 4541 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4542 | } |
| 4543 | |
| 4544 | |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 4545 | Register InstanceofStub::left() { return eax; } |
| 4546 | |
| 4547 | |
| 4548 | Register InstanceofStub::right() { return edx; } |
| 4549 | |
| 4550 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4551 | int CompareStub::MinorKey() { |
| 4552 | // Encode the three parameters in a unique 16 bit value. To avoid duplicate |
| 4553 | // stubs the never NaN NaN condition is only taken into account if the |
| 4554 | // condition is equals. |
| 4555 | ASSERT(static_cast<unsigned>(cc_) < (1 << 12)); |
| 4556 | ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| 4557 | return ConditionField::encode(static_cast<unsigned>(cc_)) |
| 4558 | | RegisterField::encode(false) // lhs_ and rhs_ are not used |
| 4559 | | StrictField::encode(strict_) |
| 4560 | | NeverNanNanField::encode(cc_ == equal ? never_nan_nan_ : false) |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4561 | | IncludeNumberCompareField::encode(include_number_compare_) |
| 4562 | | IncludeSmiCompareField::encode(include_smi_compare_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4563 | } |
| 4564 | |
| 4565 | |
| 4566 | // Unfortunately you have to run without snapshots to see most of these |
| 4567 | // names in the profile since most compare stubs end up in the snapshot. |
| 4568 | const char* CompareStub::GetName() { |
| 4569 | ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| 4570 | |
| 4571 | if (name_ != NULL) return name_; |
| 4572 | const int kMaxNameLength = 100; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4573 | name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray( |
| 4574 | kMaxNameLength); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4575 | if (name_ == NULL) return "OOM"; |
| 4576 | |
| 4577 | const char* cc_name; |
| 4578 | switch (cc_) { |
| 4579 | case less: cc_name = "LT"; break; |
| 4580 | case greater: cc_name = "GT"; break; |
| 4581 | case less_equal: cc_name = "LE"; break; |
| 4582 | case greater_equal: cc_name = "GE"; break; |
| 4583 | case equal: cc_name = "EQ"; break; |
| 4584 | case not_equal: cc_name = "NE"; break; |
| 4585 | default: cc_name = "UnknownCondition"; break; |
| 4586 | } |
| 4587 | |
| 4588 | const char* strict_name = ""; |
| 4589 | if (strict_ && (cc_ == equal || cc_ == not_equal)) { |
| 4590 | strict_name = "_STRICT"; |
| 4591 | } |
| 4592 | |
| 4593 | const char* never_nan_nan_name = ""; |
| 4594 | if (never_nan_nan_ && (cc_ == equal || cc_ == not_equal)) { |
| 4595 | never_nan_nan_name = "_NO_NAN"; |
| 4596 | } |
| 4597 | |
| 4598 | const char* include_number_compare_name = ""; |
| 4599 | if (!include_number_compare_) { |
| 4600 | include_number_compare_name = "_NO_NUMBER"; |
| 4601 | } |
| 4602 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4603 | const char* include_smi_compare_name = ""; |
| 4604 | if (!include_smi_compare_) { |
| 4605 | include_smi_compare_name = "_NO_SMI"; |
| 4606 | } |
| 4607 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4608 | OS::SNPrintF(Vector<char>(name_, kMaxNameLength), |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4609 | "CompareStub_%s%s%s%s%s", |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4610 | cc_name, |
| 4611 | strict_name, |
| 4612 | never_nan_nan_name, |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 4613 | include_number_compare_name, |
| 4614 | include_smi_compare_name); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4615 | return name_; |
| 4616 | } |
| 4617 | |
| 4618 | |
| 4619 | // ------------------------------------------------------------------------- |
| 4620 | // StringCharCodeAtGenerator |
| 4621 | |
| 4622 | void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 4623 | Label flat_string; |
| 4624 | Label ascii_string; |
| 4625 | Label got_char_code; |
| 4626 | |
| 4627 | // If the receiver is a smi trigger the non-string case. |
| 4628 | STATIC_ASSERT(kSmiTag == 0); |
| 4629 | __ test(object_, Immediate(kSmiTagMask)); |
| 4630 | __ j(zero, receiver_not_string_); |
| 4631 | |
| 4632 | // Fetch the instance type of the receiver into result register. |
| 4633 | __ mov(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 4634 | __ movzx_b(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| 4635 | // If the receiver is not a string trigger the non-string case. |
| 4636 | __ test(result_, Immediate(kIsNotStringMask)); |
| 4637 | __ j(not_zero, receiver_not_string_); |
| 4638 | |
| 4639 | // If the index is non-smi trigger the non-smi case. |
| 4640 | STATIC_ASSERT(kSmiTag == 0); |
| 4641 | __ test(index_, Immediate(kSmiTagMask)); |
| 4642 | __ j(not_zero, &index_not_smi_); |
| 4643 | |
| 4644 | // Put smi-tagged index into scratch register. |
| 4645 | __ mov(scratch_, index_); |
| 4646 | __ bind(&got_smi_index_); |
| 4647 | |
| 4648 | // Check for index out of range. |
| 4649 | __ cmp(scratch_, FieldOperand(object_, String::kLengthOffset)); |
| 4650 | __ j(above_equal, index_out_of_range_); |
| 4651 | |
| 4652 | // We need special handling for non-flat strings. |
| 4653 | STATIC_ASSERT(kSeqStringTag == 0); |
| 4654 | __ test(result_, Immediate(kStringRepresentationMask)); |
| 4655 | __ j(zero, &flat_string); |
| 4656 | |
| 4657 | // Handle non-flat strings. |
| 4658 | __ test(result_, Immediate(kIsConsStringMask)); |
| 4659 | __ j(zero, &call_runtime_); |
| 4660 | |
| 4661 | // ConsString. |
| 4662 | // Check whether the right hand side is the empty string (i.e. if |
| 4663 | // this is really a flat string in a cons string). If that is not |
| 4664 | // the case we would rather go to the runtime system now to flatten |
| 4665 | // the string. |
| 4666 | __ cmp(FieldOperand(object_, ConsString::kSecondOffset), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4667 | Immediate(masm->isolate()->factory()->empty_string())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4668 | __ j(not_equal, &call_runtime_); |
| 4669 | // Get the first of the two strings and load its instance type. |
| 4670 | __ mov(object_, FieldOperand(object_, ConsString::kFirstOffset)); |
| 4671 | __ mov(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 4672 | __ movzx_b(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| 4673 | // If the first cons component is also non-flat, then go to runtime. |
| 4674 | STATIC_ASSERT(kSeqStringTag == 0); |
| 4675 | __ test(result_, Immediate(kStringRepresentationMask)); |
| 4676 | __ j(not_zero, &call_runtime_); |
| 4677 | |
| 4678 | // Check for 1-byte or 2-byte string. |
| 4679 | __ bind(&flat_string); |
| 4680 | STATIC_ASSERT(kAsciiStringTag != 0); |
| 4681 | __ test(result_, Immediate(kStringEncodingMask)); |
| 4682 | __ j(not_zero, &ascii_string); |
| 4683 | |
| 4684 | // 2-byte string. |
| 4685 | // Load the 2-byte character code into the result register. |
| 4686 | STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| 4687 | __ movzx_w(result_, FieldOperand(object_, |
| 4688 | scratch_, times_1, // Scratch is smi-tagged. |
| 4689 | SeqTwoByteString::kHeaderSize)); |
| 4690 | __ jmp(&got_char_code); |
| 4691 | |
| 4692 | // ASCII string. |
| 4693 | // Load the byte into the result register. |
| 4694 | __ bind(&ascii_string); |
| 4695 | __ SmiUntag(scratch_); |
| 4696 | __ movzx_b(result_, FieldOperand(object_, |
| 4697 | scratch_, times_1, |
| 4698 | SeqAsciiString::kHeaderSize)); |
| 4699 | __ bind(&got_char_code); |
| 4700 | __ SmiTag(result_); |
| 4701 | __ bind(&exit_); |
| 4702 | } |
| 4703 | |
| 4704 | |
| 4705 | void StringCharCodeAtGenerator::GenerateSlow( |
| 4706 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 4707 | __ Abort("Unexpected fallthrough to CharCodeAt slow case"); |
| 4708 | |
| 4709 | // Index is not a smi. |
| 4710 | __ bind(&index_not_smi_); |
| 4711 | // If index is a heap number, try converting it to an integer. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4712 | __ CheckMap(index_, |
| 4713 | masm->isolate()->factory()->heap_number_map(), |
| 4714 | index_not_number_, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4715 | DONT_DO_SMI_CHECK); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4716 | call_helper.BeforeCall(masm); |
| 4717 | __ push(object_); |
| 4718 | __ push(index_); |
| 4719 | __ push(index_); // Consumed by runtime conversion function. |
| 4720 | if (index_flags_ == STRING_INDEX_IS_NUMBER) { |
| 4721 | __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero, 1); |
| 4722 | } else { |
| 4723 | ASSERT(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); |
| 4724 | // NumberToSmi discards numbers that are not exact integers. |
| 4725 | __ CallRuntime(Runtime::kNumberToSmi, 1); |
| 4726 | } |
| 4727 | if (!scratch_.is(eax)) { |
| 4728 | // Save the conversion result before the pop instructions below |
| 4729 | // have a chance to overwrite it. |
| 4730 | __ mov(scratch_, eax); |
| 4731 | } |
| 4732 | __ pop(index_); |
| 4733 | __ pop(object_); |
| 4734 | // Reload the instance type. |
| 4735 | __ mov(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 4736 | __ movzx_b(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| 4737 | call_helper.AfterCall(masm); |
| 4738 | // If index is still not a smi, it must be out of range. |
| 4739 | STATIC_ASSERT(kSmiTag == 0); |
| 4740 | __ test(scratch_, Immediate(kSmiTagMask)); |
| 4741 | __ j(not_zero, index_out_of_range_); |
| 4742 | // Otherwise, return to the fast path. |
| 4743 | __ jmp(&got_smi_index_); |
| 4744 | |
| 4745 | // Call runtime. We get here when the receiver is a string and the |
| 4746 | // index is a number, but the code of getting the actual character |
| 4747 | // is too complex (e.g., when the string needs to be flattened). |
| 4748 | __ bind(&call_runtime_); |
| 4749 | call_helper.BeforeCall(masm); |
| 4750 | __ push(object_); |
| 4751 | __ push(index_); |
| 4752 | __ CallRuntime(Runtime::kStringCharCodeAt, 2); |
| 4753 | if (!result_.is(eax)) { |
| 4754 | __ mov(result_, eax); |
| 4755 | } |
| 4756 | call_helper.AfterCall(masm); |
| 4757 | __ jmp(&exit_); |
| 4758 | |
| 4759 | __ Abort("Unexpected fallthrough from CharCodeAt slow case"); |
| 4760 | } |
| 4761 | |
| 4762 | |
| 4763 | // ------------------------------------------------------------------------- |
| 4764 | // StringCharFromCodeGenerator |
| 4765 | |
| 4766 | void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
| 4767 | // Fast case of Heap::LookupSingleCharacterStringFromCode. |
| 4768 | STATIC_ASSERT(kSmiTag == 0); |
| 4769 | STATIC_ASSERT(kSmiShiftSize == 0); |
| 4770 | ASSERT(IsPowerOf2(String::kMaxAsciiCharCode + 1)); |
| 4771 | __ test(code_, |
| 4772 | Immediate(kSmiTagMask | |
| 4773 | ((~String::kMaxAsciiCharCode) << kSmiTagSize))); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4774 | __ j(not_zero, &slow_case_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4775 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4776 | Factory* factory = masm->isolate()->factory(); |
| 4777 | __ Set(result_, Immediate(factory->single_character_string_cache())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4778 | STATIC_ASSERT(kSmiTag == 0); |
| 4779 | STATIC_ASSERT(kSmiTagSize == 1); |
| 4780 | STATIC_ASSERT(kSmiShiftSize == 0); |
| 4781 | // At this point code register contains smi tagged ascii char code. |
| 4782 | __ mov(result_, FieldOperand(result_, |
| 4783 | code_, times_half_pointer_size, |
| 4784 | FixedArray::kHeaderSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4785 | __ cmp(result_, factory->undefined_value()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4786 | __ j(equal, &slow_case_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4787 | __ bind(&exit_); |
| 4788 | } |
| 4789 | |
| 4790 | |
| 4791 | void StringCharFromCodeGenerator::GenerateSlow( |
| 4792 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 4793 | __ Abort("Unexpected fallthrough to CharFromCode slow case"); |
| 4794 | |
| 4795 | __ bind(&slow_case_); |
| 4796 | call_helper.BeforeCall(masm); |
| 4797 | __ push(code_); |
| 4798 | __ CallRuntime(Runtime::kCharFromCode, 1); |
| 4799 | if (!result_.is(eax)) { |
| 4800 | __ mov(result_, eax); |
| 4801 | } |
| 4802 | call_helper.AfterCall(masm); |
| 4803 | __ jmp(&exit_); |
| 4804 | |
| 4805 | __ Abort("Unexpected fallthrough from CharFromCode slow case"); |
| 4806 | } |
| 4807 | |
| 4808 | |
| 4809 | // ------------------------------------------------------------------------- |
| 4810 | // StringCharAtGenerator |
| 4811 | |
| 4812 | void StringCharAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 4813 | char_code_at_generator_.GenerateFast(masm); |
| 4814 | char_from_code_generator_.GenerateFast(masm); |
| 4815 | } |
| 4816 | |
| 4817 | |
| 4818 | void StringCharAtGenerator::GenerateSlow( |
| 4819 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 4820 | char_code_at_generator_.GenerateSlow(masm, call_helper); |
| 4821 | char_from_code_generator_.GenerateSlow(masm, call_helper); |
| 4822 | } |
| 4823 | |
| 4824 | |
| 4825 | void StringAddStub::Generate(MacroAssembler* masm) { |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 4826 | Label string_add_runtime, call_builtin; |
| 4827 | Builtins::JavaScript builtin_id = Builtins::ADD; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4828 | |
| 4829 | // Load the two arguments. |
| 4830 | __ mov(eax, Operand(esp, 2 * kPointerSize)); // First argument. |
| 4831 | __ mov(edx, Operand(esp, 1 * kPointerSize)); // Second argument. |
| 4832 | |
| 4833 | // Make sure that both arguments are strings if not known in advance. |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 4834 | if (flags_ == NO_STRING_ADD_FLAGS) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4835 | __ test(eax, Immediate(kSmiTagMask)); |
| 4836 | __ j(zero, &string_add_runtime); |
| 4837 | __ CmpObjectType(eax, FIRST_NONSTRING_TYPE, ebx); |
| 4838 | __ j(above_equal, &string_add_runtime); |
| 4839 | |
| 4840 | // First argument is a a string, test second. |
| 4841 | __ test(edx, Immediate(kSmiTagMask)); |
| 4842 | __ j(zero, &string_add_runtime); |
| 4843 | __ CmpObjectType(edx, FIRST_NONSTRING_TYPE, ebx); |
| 4844 | __ j(above_equal, &string_add_runtime); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 4845 | } else { |
| 4846 | // Here at least one of the arguments is definitely a string. |
| 4847 | // We convert the one that is not known to be a string. |
| 4848 | if ((flags_ & NO_STRING_CHECK_LEFT_IN_STUB) == 0) { |
| 4849 | ASSERT((flags_ & NO_STRING_CHECK_RIGHT_IN_STUB) != 0); |
| 4850 | GenerateConvertArgument(masm, 2 * kPointerSize, eax, ebx, ecx, edi, |
| 4851 | &call_builtin); |
| 4852 | builtin_id = Builtins::STRING_ADD_RIGHT; |
| 4853 | } else if ((flags_ & NO_STRING_CHECK_RIGHT_IN_STUB) == 0) { |
| 4854 | ASSERT((flags_ & NO_STRING_CHECK_LEFT_IN_STUB) != 0); |
| 4855 | GenerateConvertArgument(masm, 1 * kPointerSize, edx, ebx, ecx, edi, |
| 4856 | &call_builtin); |
| 4857 | builtin_id = Builtins::STRING_ADD_LEFT; |
| 4858 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4859 | } |
| 4860 | |
| 4861 | // Both arguments are strings. |
| 4862 | // eax: first string |
| 4863 | // edx: second string |
| 4864 | // Check if either of the strings are empty. In that case return the other. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4865 | Label second_not_zero_length, both_not_zero_length; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4866 | __ mov(ecx, FieldOperand(edx, String::kLengthOffset)); |
| 4867 | STATIC_ASSERT(kSmiTag == 0); |
| 4868 | __ test(ecx, Operand(ecx)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4869 | __ j(not_zero, &second_not_zero_length, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4870 | // Second string is empty, result is first string which is already in eax. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4871 | Counters* counters = masm->isolate()->counters(); |
| 4872 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4873 | __ ret(2 * kPointerSize); |
| 4874 | __ bind(&second_not_zero_length); |
| 4875 | __ mov(ebx, FieldOperand(eax, String::kLengthOffset)); |
| 4876 | STATIC_ASSERT(kSmiTag == 0); |
| 4877 | __ test(ebx, Operand(ebx)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 4878 | __ j(not_zero, &both_not_zero_length, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4879 | // First string is empty, result is second string which is in edx. |
| 4880 | __ mov(eax, edx); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4881 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4882 | __ ret(2 * kPointerSize); |
| 4883 | |
| 4884 | // Both strings are non-empty. |
| 4885 | // eax: first string |
| 4886 | // ebx: length of first string as a smi |
| 4887 | // ecx: length of second string as a smi |
| 4888 | // edx: second string |
| 4889 | // Look at the length of the result of adding the two strings. |
| 4890 | Label string_add_flat_result, longer_than_two; |
| 4891 | __ bind(&both_not_zero_length); |
| 4892 | __ add(ebx, Operand(ecx)); |
| 4893 | STATIC_ASSERT(Smi::kMaxValue == String::kMaxLength); |
| 4894 | // Handle exceptionally long strings in the runtime system. |
| 4895 | __ j(overflow, &string_add_runtime); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4896 | // Use the symbol table when adding two one character strings, as it |
| 4897 | // helps later optimizations to return a symbol here. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4898 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(2))); |
| 4899 | __ j(not_equal, &longer_than_two); |
| 4900 | |
| 4901 | // Check that both strings are non-external ascii strings. |
| 4902 | __ JumpIfNotBothSequentialAsciiStrings(eax, edx, ebx, ecx, |
| 4903 | &string_add_runtime); |
| 4904 | |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 4905 | // Get the two characters forming the new string. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4906 | __ movzx_b(ebx, FieldOperand(eax, SeqAsciiString::kHeaderSize)); |
| 4907 | __ movzx_b(ecx, FieldOperand(edx, SeqAsciiString::kHeaderSize)); |
| 4908 | |
| 4909 | // Try to lookup two character string in symbol table. If it is not found |
| 4910 | // just allocate a new one. |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 4911 | Label make_two_character_string, make_two_character_string_no_reload; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4912 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 4913 | masm, ebx, ecx, eax, edx, edi, |
| 4914 | &make_two_character_string_no_reload, &make_two_character_string); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4915 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4916 | __ ret(2 * kPointerSize); |
| 4917 | |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 4918 | // Allocate a two character string. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4919 | __ bind(&make_two_character_string); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 4920 | // Reload the arguments. |
| 4921 | __ mov(eax, Operand(esp, 2 * kPointerSize)); // First argument. |
| 4922 | __ mov(edx, Operand(esp, 1 * kPointerSize)); // Second argument. |
| 4923 | // Get the two characters forming the new string. |
| 4924 | __ movzx_b(ebx, FieldOperand(eax, SeqAsciiString::kHeaderSize)); |
| 4925 | __ movzx_b(ecx, FieldOperand(edx, SeqAsciiString::kHeaderSize)); |
| 4926 | __ bind(&make_two_character_string_no_reload); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4927 | __ IncrementCounter(counters->string_add_make_two_char(), 1); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 4928 | __ AllocateAsciiString(eax, // Result. |
| 4929 | 2, // Length. |
| 4930 | edi, // Scratch 1. |
| 4931 | edx, // Scratch 2. |
| 4932 | &string_add_runtime); |
| 4933 | // Pack both characters in ebx. |
| 4934 | __ shl(ecx, kBitsPerByte); |
| 4935 | __ or_(ebx, Operand(ecx)); |
| 4936 | // Set the characters in the new string. |
| 4937 | __ mov_w(FieldOperand(eax, SeqAsciiString::kHeaderSize), ebx); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4938 | __ IncrementCounter(counters->string_add_native(), 1); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 4939 | __ ret(2 * kPointerSize); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4940 | |
| 4941 | __ bind(&longer_than_two); |
| 4942 | // Check if resulting string will be flat. |
| 4943 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(String::kMinNonFlatLength))); |
| 4944 | __ j(below, &string_add_flat_result); |
| 4945 | |
| 4946 | // If result is not supposed to be flat allocate a cons string object. If both |
| 4947 | // strings are ascii the result is an ascii cons string. |
| 4948 | Label non_ascii, allocated, ascii_data; |
| 4949 | __ mov(edi, FieldOperand(eax, HeapObject::kMapOffset)); |
| 4950 | __ movzx_b(ecx, FieldOperand(edi, Map::kInstanceTypeOffset)); |
| 4951 | __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset)); |
| 4952 | __ movzx_b(edi, FieldOperand(edi, Map::kInstanceTypeOffset)); |
| 4953 | __ and_(ecx, Operand(edi)); |
| 4954 | STATIC_ASSERT(kStringEncodingMask == kAsciiStringTag); |
| 4955 | __ test(ecx, Immediate(kAsciiStringTag)); |
| 4956 | __ j(zero, &non_ascii); |
| 4957 | __ bind(&ascii_data); |
| 4958 | // Allocate an acsii cons string. |
| 4959 | __ AllocateAsciiConsString(ecx, edi, no_reg, &string_add_runtime); |
| 4960 | __ bind(&allocated); |
| 4961 | // Fill the fields of the cons string. |
| 4962 | if (FLAG_debug_code) __ AbortIfNotSmi(ebx); |
| 4963 | __ mov(FieldOperand(ecx, ConsString::kLengthOffset), ebx); |
| 4964 | __ mov(FieldOperand(ecx, ConsString::kHashFieldOffset), |
| 4965 | Immediate(String::kEmptyHashField)); |
| 4966 | __ mov(FieldOperand(ecx, ConsString::kFirstOffset), eax); |
| 4967 | __ mov(FieldOperand(ecx, ConsString::kSecondOffset), edx); |
| 4968 | __ mov(eax, ecx); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 4969 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4970 | __ ret(2 * kPointerSize); |
| 4971 | __ bind(&non_ascii); |
| 4972 | // At least one of the strings is two-byte. Check whether it happens |
| 4973 | // to contain only ascii characters. |
| 4974 | // ecx: first instance type AND second instance type. |
| 4975 | // edi: second instance type. |
| 4976 | __ test(ecx, Immediate(kAsciiDataHintMask)); |
| 4977 | __ j(not_zero, &ascii_data); |
| 4978 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 4979 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 4980 | __ xor_(edi, Operand(ecx)); |
| 4981 | STATIC_ASSERT(kAsciiStringTag != 0 && kAsciiDataHintTag != 0); |
| 4982 | __ and_(edi, kAsciiStringTag | kAsciiDataHintTag); |
| 4983 | __ cmp(edi, kAsciiStringTag | kAsciiDataHintTag); |
| 4984 | __ j(equal, &ascii_data); |
| 4985 | // Allocate a two byte cons string. |
| 4986 | __ AllocateConsString(ecx, edi, no_reg, &string_add_runtime); |
| 4987 | __ jmp(&allocated); |
| 4988 | |
| 4989 | // Handle creating a flat result. First check that both strings are not |
| 4990 | // external strings. |
| 4991 | // eax: first string |
| 4992 | // ebx: length of resulting flat string as a smi |
| 4993 | // edx: second string |
| 4994 | __ bind(&string_add_flat_result); |
| 4995 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 4996 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 4997 | __ and_(ecx, kStringRepresentationMask); |
| 4998 | __ cmp(ecx, kExternalStringTag); |
| 4999 | __ j(equal, &string_add_runtime); |
| 5000 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 5001 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 5002 | __ and_(ecx, kStringRepresentationMask); |
| 5003 | __ cmp(ecx, kExternalStringTag); |
| 5004 | __ j(equal, &string_add_runtime); |
| 5005 | // Now check if both strings are ascii strings. |
| 5006 | // eax: first string |
| 5007 | // ebx: length of resulting flat string as a smi |
| 5008 | // edx: second string |
| 5009 | Label non_ascii_string_add_flat_result; |
| 5010 | STATIC_ASSERT(kStringEncodingMask == kAsciiStringTag); |
| 5011 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 5012 | __ test_b(FieldOperand(ecx, Map::kInstanceTypeOffset), kAsciiStringTag); |
| 5013 | __ j(zero, &non_ascii_string_add_flat_result); |
| 5014 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 5015 | __ test_b(FieldOperand(ecx, Map::kInstanceTypeOffset), kAsciiStringTag); |
| 5016 | __ j(zero, &string_add_runtime); |
| 5017 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5018 | // Both strings are ascii strings. As they are short they are both flat. |
| 5019 | // ebx: length of resulting flat string as a smi |
| 5020 | __ SmiUntag(ebx); |
| 5021 | __ AllocateAsciiString(eax, ebx, ecx, edx, edi, &string_add_runtime); |
| 5022 | // eax: result string |
| 5023 | __ mov(ecx, eax); |
| 5024 | // Locate first character of result. |
| 5025 | __ add(Operand(ecx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5026 | // Load first argument and locate first character. |
| 5027 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 5028 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
| 5029 | __ SmiUntag(edi); |
| 5030 | __ add(Operand(edx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5031 | // eax: result string |
| 5032 | // ecx: first character of result |
| 5033 | // edx: first char of first argument |
| 5034 | // edi: length of first argument |
| 5035 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, true); |
| 5036 | // Load second argument and locate first character. |
| 5037 | __ mov(edx, Operand(esp, 1 * kPointerSize)); |
| 5038 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
| 5039 | __ SmiUntag(edi); |
| 5040 | __ add(Operand(edx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5041 | // eax: result string |
| 5042 | // ecx: next character of result |
| 5043 | // edx: first char of second argument |
| 5044 | // edi: length of second argument |
| 5045 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, true); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 5046 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5047 | __ ret(2 * kPointerSize); |
| 5048 | |
| 5049 | // Handle creating a flat two byte result. |
| 5050 | // eax: first string - known to be two byte |
| 5051 | // ebx: length of resulting flat string as a smi |
| 5052 | // edx: second string |
| 5053 | __ bind(&non_ascii_string_add_flat_result); |
| 5054 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 5055 | __ test_b(FieldOperand(ecx, Map::kInstanceTypeOffset), kAsciiStringTag); |
| 5056 | __ j(not_zero, &string_add_runtime); |
| 5057 | // Both strings are two byte strings. As they are short they are both |
| 5058 | // flat. |
| 5059 | __ SmiUntag(ebx); |
| 5060 | __ AllocateTwoByteString(eax, ebx, ecx, edx, edi, &string_add_runtime); |
| 5061 | // eax: result string |
| 5062 | __ mov(ecx, eax); |
| 5063 | // Locate first character of result. |
| 5064 | __ add(Operand(ecx), |
| 5065 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 5066 | // Load first argument and locate first character. |
| 5067 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 5068 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
| 5069 | __ SmiUntag(edi); |
| 5070 | __ add(Operand(edx), |
| 5071 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 5072 | // eax: result string |
| 5073 | // ecx: first character of result |
| 5074 | // edx: first char of first argument |
| 5075 | // edi: length of first argument |
| 5076 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, false); |
| 5077 | // Load second argument and locate first character. |
| 5078 | __ mov(edx, Operand(esp, 1 * kPointerSize)); |
| 5079 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
| 5080 | __ SmiUntag(edi); |
| 5081 | __ add(Operand(edx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5082 | // eax: result string |
| 5083 | // ecx: next character of result |
| 5084 | // edx: first char of second argument |
| 5085 | // edi: length of second argument |
| 5086 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, false); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 5087 | __ IncrementCounter(counters->string_add_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5088 | __ ret(2 * kPointerSize); |
| 5089 | |
| 5090 | // Just jump to runtime to add the two strings. |
| 5091 | __ bind(&string_add_runtime); |
| 5092 | __ TailCallRuntime(Runtime::kStringAdd, 2, 1); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 5093 | |
| 5094 | if (call_builtin.is_linked()) { |
| 5095 | __ bind(&call_builtin); |
| 5096 | __ InvokeBuiltin(builtin_id, JUMP_FUNCTION); |
| 5097 | } |
| 5098 | } |
| 5099 | |
| 5100 | |
| 5101 | void StringAddStub::GenerateConvertArgument(MacroAssembler* masm, |
| 5102 | int stack_offset, |
| 5103 | Register arg, |
| 5104 | Register scratch1, |
| 5105 | Register scratch2, |
| 5106 | Register scratch3, |
| 5107 | Label* slow) { |
| 5108 | // First check if the argument is already a string. |
| 5109 | Label not_string, done; |
| 5110 | __ test(arg, Immediate(kSmiTagMask)); |
| 5111 | __ j(zero, ¬_string); |
| 5112 | __ CmpObjectType(arg, FIRST_NONSTRING_TYPE, scratch1); |
| 5113 | __ j(below, &done); |
| 5114 | |
| 5115 | // Check the number to string cache. |
| 5116 | Label not_cached; |
| 5117 | __ bind(¬_string); |
| 5118 | // Puts the cached result into scratch1. |
| 5119 | NumberToStringStub::GenerateLookupNumberStringCache(masm, |
| 5120 | arg, |
| 5121 | scratch1, |
| 5122 | scratch2, |
| 5123 | scratch3, |
| 5124 | false, |
| 5125 | ¬_cached); |
| 5126 | __ mov(arg, scratch1); |
| 5127 | __ mov(Operand(esp, stack_offset), arg); |
| 5128 | __ jmp(&done); |
| 5129 | |
| 5130 | // Check if the argument is a safe string wrapper. |
| 5131 | __ bind(¬_cached); |
| 5132 | __ test(arg, Immediate(kSmiTagMask)); |
| 5133 | __ j(zero, slow); |
| 5134 | __ CmpObjectType(arg, JS_VALUE_TYPE, scratch1); // map -> scratch1. |
| 5135 | __ j(not_equal, slow); |
| 5136 | __ test_b(FieldOperand(scratch1, Map::kBitField2Offset), |
| 5137 | 1 << Map::kStringWrapperSafeForDefaultValueOf); |
| 5138 | __ j(zero, slow); |
| 5139 | __ mov(arg, FieldOperand(arg, JSValue::kValueOffset)); |
| 5140 | __ mov(Operand(esp, stack_offset), arg); |
| 5141 | |
| 5142 | __ bind(&done); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5143 | } |
| 5144 | |
| 5145 | |
| 5146 | void StringHelper::GenerateCopyCharacters(MacroAssembler* masm, |
| 5147 | Register dest, |
| 5148 | Register src, |
| 5149 | Register count, |
| 5150 | Register scratch, |
| 5151 | bool ascii) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5152 | Label loop; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5153 | __ bind(&loop); |
| 5154 | // This loop just copies one character at a time, as it is only used for very |
| 5155 | // short strings. |
| 5156 | if (ascii) { |
| 5157 | __ mov_b(scratch, Operand(src, 0)); |
| 5158 | __ mov_b(Operand(dest, 0), scratch); |
| 5159 | __ add(Operand(src), Immediate(1)); |
| 5160 | __ add(Operand(dest), Immediate(1)); |
| 5161 | } else { |
| 5162 | __ mov_w(scratch, Operand(src, 0)); |
| 5163 | __ mov_w(Operand(dest, 0), scratch); |
| 5164 | __ add(Operand(src), Immediate(2)); |
| 5165 | __ add(Operand(dest), Immediate(2)); |
| 5166 | } |
| 5167 | __ sub(Operand(count), Immediate(1)); |
| 5168 | __ j(not_zero, &loop); |
| 5169 | } |
| 5170 | |
| 5171 | |
| 5172 | void StringHelper::GenerateCopyCharactersREP(MacroAssembler* masm, |
| 5173 | Register dest, |
| 5174 | Register src, |
| 5175 | Register count, |
| 5176 | Register scratch, |
| 5177 | bool ascii) { |
| 5178 | // Copy characters using rep movs of doublewords. |
| 5179 | // The destination is aligned on a 4 byte boundary because we are |
| 5180 | // copying to the beginning of a newly allocated string. |
| 5181 | ASSERT(dest.is(edi)); // rep movs destination |
| 5182 | ASSERT(src.is(esi)); // rep movs source |
| 5183 | ASSERT(count.is(ecx)); // rep movs count |
| 5184 | ASSERT(!scratch.is(dest)); |
| 5185 | ASSERT(!scratch.is(src)); |
| 5186 | ASSERT(!scratch.is(count)); |
| 5187 | |
| 5188 | // Nothing to do for zero characters. |
| 5189 | Label done; |
| 5190 | __ test(count, Operand(count)); |
| 5191 | __ j(zero, &done); |
| 5192 | |
| 5193 | // Make count the number of bytes to copy. |
| 5194 | if (!ascii) { |
| 5195 | __ shl(count, 1); |
| 5196 | } |
| 5197 | |
| 5198 | // Don't enter the rep movs if there are less than 4 bytes to copy. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5199 | Label last_bytes; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5200 | __ test(count, Immediate(~3)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5201 | __ j(zero, &last_bytes, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5202 | |
| 5203 | // Copy from edi to esi using rep movs instruction. |
| 5204 | __ mov(scratch, count); |
| 5205 | __ sar(count, 2); // Number of doublewords to copy. |
| 5206 | __ cld(); |
| 5207 | __ rep_movs(); |
| 5208 | |
| 5209 | // Find number of bytes left. |
| 5210 | __ mov(count, scratch); |
| 5211 | __ and_(count, 3); |
| 5212 | |
| 5213 | // Check if there are more bytes to copy. |
| 5214 | __ bind(&last_bytes); |
| 5215 | __ test(count, Operand(count)); |
| 5216 | __ j(zero, &done); |
| 5217 | |
| 5218 | // Copy remaining characters. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5219 | Label loop; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5220 | __ bind(&loop); |
| 5221 | __ mov_b(scratch, Operand(src, 0)); |
| 5222 | __ mov_b(Operand(dest, 0), scratch); |
| 5223 | __ add(Operand(src), Immediate(1)); |
| 5224 | __ add(Operand(dest), Immediate(1)); |
| 5225 | __ sub(Operand(count), Immediate(1)); |
| 5226 | __ j(not_zero, &loop); |
| 5227 | |
| 5228 | __ bind(&done); |
| 5229 | } |
| 5230 | |
| 5231 | |
| 5232 | void StringHelper::GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm, |
| 5233 | Register c1, |
| 5234 | Register c2, |
| 5235 | Register scratch1, |
| 5236 | Register scratch2, |
| 5237 | Register scratch3, |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 5238 | Label* not_probed, |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5239 | Label* not_found) { |
| 5240 | // Register scratch3 is the general scratch register in this function. |
| 5241 | Register scratch = scratch3; |
| 5242 | |
| 5243 | // Make sure that both characters are not digits as such strings has a |
| 5244 | // different hash algorithm. Don't try to look for these in the symbol table. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5245 | Label not_array_index; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5246 | __ mov(scratch, c1); |
| 5247 | __ sub(Operand(scratch), Immediate(static_cast<int>('0'))); |
| 5248 | __ cmp(Operand(scratch), Immediate(static_cast<int>('9' - '0'))); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5249 | __ j(above, ¬_array_index, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5250 | __ mov(scratch, c2); |
| 5251 | __ sub(Operand(scratch), Immediate(static_cast<int>('0'))); |
| 5252 | __ cmp(Operand(scratch), Immediate(static_cast<int>('9' - '0'))); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 5253 | __ j(below_equal, not_probed); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5254 | |
| 5255 | __ bind(¬_array_index); |
| 5256 | // Calculate the two character string hash. |
| 5257 | Register hash = scratch1; |
| 5258 | GenerateHashInit(masm, hash, c1, scratch); |
| 5259 | GenerateHashAddCharacter(masm, hash, c2, scratch); |
| 5260 | GenerateHashGetHash(masm, hash, scratch); |
| 5261 | |
| 5262 | // Collect the two characters in a register. |
| 5263 | Register chars = c1; |
| 5264 | __ shl(c2, kBitsPerByte); |
| 5265 | __ or_(chars, Operand(c2)); |
| 5266 | |
| 5267 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 5268 | // hash: hash of two character string. |
| 5269 | |
| 5270 | // Load the symbol table. |
| 5271 | Register symbol_table = c2; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 5272 | ExternalReference roots_address = |
| 5273 | ExternalReference::roots_address(masm->isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5274 | __ mov(scratch, Immediate(Heap::kSymbolTableRootIndex)); |
| 5275 | __ mov(symbol_table, |
| 5276 | Operand::StaticArray(scratch, times_pointer_size, roots_address)); |
| 5277 | |
| 5278 | // Calculate capacity mask from the symbol table capacity. |
| 5279 | Register mask = scratch2; |
| 5280 | __ mov(mask, FieldOperand(symbol_table, SymbolTable::kCapacityOffset)); |
| 5281 | __ SmiUntag(mask); |
| 5282 | __ sub(Operand(mask), Immediate(1)); |
| 5283 | |
| 5284 | // Registers |
| 5285 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 5286 | // hash: hash of two character string |
| 5287 | // symbol_table: symbol table |
| 5288 | // mask: capacity mask |
| 5289 | // scratch: - |
| 5290 | |
| 5291 | // Perform a number of probes in the symbol table. |
| 5292 | static const int kProbes = 4; |
| 5293 | Label found_in_symbol_table; |
| 5294 | Label next_probe[kProbes], next_probe_pop_mask[kProbes]; |
| 5295 | for (int i = 0; i < kProbes; i++) { |
| 5296 | // Calculate entry in symbol table. |
| 5297 | __ mov(scratch, hash); |
| 5298 | if (i > 0) { |
| 5299 | __ add(Operand(scratch), Immediate(SymbolTable::GetProbeOffset(i))); |
| 5300 | } |
| 5301 | __ and_(scratch, Operand(mask)); |
| 5302 | |
| 5303 | // Load the entry from the symbol table. |
| 5304 | Register candidate = scratch; // Scratch register contains candidate. |
| 5305 | STATIC_ASSERT(SymbolTable::kEntrySize == 1); |
| 5306 | __ mov(candidate, |
| 5307 | FieldOperand(symbol_table, |
| 5308 | scratch, |
| 5309 | times_pointer_size, |
| 5310 | SymbolTable::kElementsStartOffset)); |
| 5311 | |
| 5312 | // If entry is undefined no string with this hash can be found. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 5313 | Factory* factory = masm->isolate()->factory(); |
| 5314 | __ cmp(candidate, factory->undefined_value()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5315 | __ j(equal, not_found); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 5316 | __ cmp(candidate, factory->null_value()); |
| 5317 | __ j(equal, &next_probe[i]); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5318 | |
| 5319 | // If length is not 2 the string is not a candidate. |
| 5320 | __ cmp(FieldOperand(candidate, String::kLengthOffset), |
| 5321 | Immediate(Smi::FromInt(2))); |
| 5322 | __ j(not_equal, &next_probe[i]); |
| 5323 | |
| 5324 | // As we are out of registers save the mask on the stack and use that |
| 5325 | // register as a temporary. |
| 5326 | __ push(mask); |
| 5327 | Register temp = mask; |
| 5328 | |
| 5329 | // Check that the candidate is a non-external ascii string. |
| 5330 | __ mov(temp, FieldOperand(candidate, HeapObject::kMapOffset)); |
| 5331 | __ movzx_b(temp, FieldOperand(temp, Map::kInstanceTypeOffset)); |
| 5332 | __ JumpIfInstanceTypeIsNotSequentialAscii( |
| 5333 | temp, temp, &next_probe_pop_mask[i]); |
| 5334 | |
| 5335 | // Check if the two characters match. |
| 5336 | __ mov(temp, FieldOperand(candidate, SeqAsciiString::kHeaderSize)); |
| 5337 | __ and_(temp, 0x0000ffff); |
| 5338 | __ cmp(chars, Operand(temp)); |
| 5339 | __ j(equal, &found_in_symbol_table); |
| 5340 | __ bind(&next_probe_pop_mask[i]); |
| 5341 | __ pop(mask); |
| 5342 | __ bind(&next_probe[i]); |
| 5343 | } |
| 5344 | |
| 5345 | // No matching 2 character string found by probing. |
| 5346 | __ jmp(not_found); |
| 5347 | |
| 5348 | // Scratch register contains result when we fall through to here. |
| 5349 | Register result = scratch; |
| 5350 | __ bind(&found_in_symbol_table); |
| 5351 | __ pop(mask); // Pop saved mask from the stack. |
| 5352 | if (!result.is(eax)) { |
| 5353 | __ mov(eax, result); |
| 5354 | } |
| 5355 | } |
| 5356 | |
| 5357 | |
| 5358 | void StringHelper::GenerateHashInit(MacroAssembler* masm, |
| 5359 | Register hash, |
| 5360 | Register character, |
| 5361 | Register scratch) { |
| 5362 | // hash = character + (character << 10); |
| 5363 | __ mov(hash, character); |
| 5364 | __ shl(hash, 10); |
| 5365 | __ add(hash, Operand(character)); |
| 5366 | // hash ^= hash >> 6; |
| 5367 | __ mov(scratch, hash); |
| 5368 | __ sar(scratch, 6); |
| 5369 | __ xor_(hash, Operand(scratch)); |
| 5370 | } |
| 5371 | |
| 5372 | |
| 5373 | void StringHelper::GenerateHashAddCharacter(MacroAssembler* masm, |
| 5374 | Register hash, |
| 5375 | Register character, |
| 5376 | Register scratch) { |
| 5377 | // hash += character; |
| 5378 | __ add(hash, Operand(character)); |
| 5379 | // hash += hash << 10; |
| 5380 | __ mov(scratch, hash); |
| 5381 | __ shl(scratch, 10); |
| 5382 | __ add(hash, Operand(scratch)); |
| 5383 | // hash ^= hash >> 6; |
| 5384 | __ mov(scratch, hash); |
| 5385 | __ sar(scratch, 6); |
| 5386 | __ xor_(hash, Operand(scratch)); |
| 5387 | } |
| 5388 | |
| 5389 | |
| 5390 | void StringHelper::GenerateHashGetHash(MacroAssembler* masm, |
| 5391 | Register hash, |
| 5392 | Register scratch) { |
| 5393 | // hash += hash << 3; |
| 5394 | __ mov(scratch, hash); |
| 5395 | __ shl(scratch, 3); |
| 5396 | __ add(hash, Operand(scratch)); |
| 5397 | // hash ^= hash >> 11; |
| 5398 | __ mov(scratch, hash); |
| 5399 | __ sar(scratch, 11); |
| 5400 | __ xor_(hash, Operand(scratch)); |
| 5401 | // hash += hash << 15; |
| 5402 | __ mov(scratch, hash); |
| 5403 | __ shl(scratch, 15); |
| 5404 | __ add(hash, Operand(scratch)); |
| 5405 | |
| 5406 | // if (hash == 0) hash = 27; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5407 | Label hash_not_zero; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5408 | __ test(hash, Operand(hash)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5409 | __ j(not_zero, &hash_not_zero, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5410 | __ mov(hash, Immediate(27)); |
| 5411 | __ bind(&hash_not_zero); |
| 5412 | } |
| 5413 | |
| 5414 | |
| 5415 | void SubStringStub::Generate(MacroAssembler* masm) { |
| 5416 | Label runtime; |
| 5417 | |
| 5418 | // Stack frame on entry. |
| 5419 | // esp[0]: return address |
| 5420 | // esp[4]: to |
| 5421 | // esp[8]: from |
| 5422 | // esp[12]: string |
| 5423 | |
| 5424 | // Make sure first argument is a string. |
| 5425 | __ mov(eax, Operand(esp, 3 * kPointerSize)); |
| 5426 | STATIC_ASSERT(kSmiTag == 0); |
| 5427 | __ test(eax, Immediate(kSmiTagMask)); |
| 5428 | __ j(zero, &runtime); |
| 5429 | Condition is_string = masm->IsObjectStringType(eax, ebx, ebx); |
| 5430 | __ j(NegateCondition(is_string), &runtime); |
| 5431 | |
| 5432 | // eax: string |
| 5433 | // ebx: instance type |
| 5434 | |
| 5435 | // Calculate length of sub string using the smi values. |
| 5436 | Label result_longer_than_two; |
| 5437 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); // To index. |
| 5438 | __ test(ecx, Immediate(kSmiTagMask)); |
| 5439 | __ j(not_zero, &runtime); |
| 5440 | __ mov(edx, Operand(esp, 2 * kPointerSize)); // From index. |
| 5441 | __ test(edx, Immediate(kSmiTagMask)); |
| 5442 | __ j(not_zero, &runtime); |
| 5443 | __ sub(ecx, Operand(edx)); |
| 5444 | __ cmp(ecx, FieldOperand(eax, String::kLengthOffset)); |
| 5445 | Label return_eax; |
| 5446 | __ j(equal, &return_eax); |
| 5447 | // Special handling of sub-strings of length 1 and 2. One character strings |
| 5448 | // are handled in the runtime system (looked up in the single character |
| 5449 | // cache). Two character strings are looked for in the symbol cache. |
| 5450 | __ SmiUntag(ecx); // Result length is no longer smi. |
| 5451 | __ cmp(ecx, 2); |
| 5452 | __ j(greater, &result_longer_than_two); |
| 5453 | __ j(less, &runtime); |
| 5454 | |
| 5455 | // Sub string of length 2 requested. |
| 5456 | // eax: string |
| 5457 | // ebx: instance type |
| 5458 | // ecx: sub string length (value is 2) |
| 5459 | // edx: from index (smi) |
| 5460 | __ JumpIfInstanceTypeIsNotSequentialAscii(ebx, ebx, &runtime); |
| 5461 | |
| 5462 | // Get the two characters forming the sub string. |
| 5463 | __ SmiUntag(edx); // From index is no longer smi. |
| 5464 | __ movzx_b(ebx, FieldOperand(eax, edx, times_1, SeqAsciiString::kHeaderSize)); |
| 5465 | __ movzx_b(ecx, |
| 5466 | FieldOperand(eax, edx, times_1, SeqAsciiString::kHeaderSize + 1)); |
| 5467 | |
| 5468 | // Try to lookup two character string in symbol table. |
| 5469 | Label make_two_character_string; |
| 5470 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 5471 | masm, ebx, ecx, eax, edx, edi, |
| 5472 | &make_two_character_string, &make_two_character_string); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5473 | __ ret(3 * kPointerSize); |
| 5474 | |
| 5475 | __ bind(&make_two_character_string); |
| 5476 | // Setup registers for allocating the two character string. |
| 5477 | __ mov(eax, Operand(esp, 3 * kPointerSize)); |
| 5478 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 5479 | __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| 5480 | __ Set(ecx, Immediate(2)); |
| 5481 | |
| 5482 | __ bind(&result_longer_than_two); |
| 5483 | // eax: string |
| 5484 | // ebx: instance type |
| 5485 | // ecx: result string length |
| 5486 | // Check for flat ascii string |
| 5487 | Label non_ascii_flat; |
| 5488 | __ JumpIfInstanceTypeIsNotSequentialAscii(ebx, ebx, &non_ascii_flat); |
| 5489 | |
| 5490 | // Allocate the result. |
| 5491 | __ AllocateAsciiString(eax, ecx, ebx, edx, edi, &runtime); |
| 5492 | |
| 5493 | // eax: result string |
| 5494 | // ecx: result string length |
| 5495 | __ mov(edx, esi); // esi used by following code. |
| 5496 | // Locate first character of result. |
| 5497 | __ mov(edi, eax); |
| 5498 | __ add(Operand(edi), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5499 | // Load string argument and locate character of sub string start. |
| 5500 | __ mov(esi, Operand(esp, 3 * kPointerSize)); |
| 5501 | __ add(Operand(esi), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5502 | __ mov(ebx, Operand(esp, 2 * kPointerSize)); // from |
| 5503 | __ SmiUntag(ebx); |
| 5504 | __ add(esi, Operand(ebx)); |
| 5505 | |
| 5506 | // eax: result string |
| 5507 | // ecx: result length |
| 5508 | // edx: original value of esi |
| 5509 | // edi: first character of result |
| 5510 | // esi: character of sub string start |
| 5511 | StringHelper::GenerateCopyCharactersREP(masm, edi, esi, ecx, ebx, true); |
| 5512 | __ mov(esi, edx); // Restore esi. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 5513 | Counters* counters = masm->isolate()->counters(); |
| 5514 | __ IncrementCounter(counters->sub_string_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5515 | __ ret(3 * kPointerSize); |
| 5516 | |
| 5517 | __ bind(&non_ascii_flat); |
| 5518 | // eax: string |
| 5519 | // ebx: instance type & kStringRepresentationMask | kStringEncodingMask |
| 5520 | // ecx: result string length |
| 5521 | // Check for flat two byte string |
| 5522 | __ cmp(ebx, kSeqStringTag | kTwoByteStringTag); |
| 5523 | __ j(not_equal, &runtime); |
| 5524 | |
| 5525 | // Allocate the result. |
| 5526 | __ AllocateTwoByteString(eax, ecx, ebx, edx, edi, &runtime); |
| 5527 | |
| 5528 | // eax: result string |
| 5529 | // ecx: result string length |
| 5530 | __ mov(edx, esi); // esi used by following code. |
| 5531 | // Locate first character of result. |
| 5532 | __ mov(edi, eax); |
| 5533 | __ add(Operand(edi), |
| 5534 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 5535 | // Load string argument and locate character of sub string start. |
| 5536 | __ mov(esi, Operand(esp, 3 * kPointerSize)); |
| 5537 | __ add(Operand(esi), |
| 5538 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 5539 | __ mov(ebx, Operand(esp, 2 * kPointerSize)); // from |
| 5540 | // As from is a smi it is 2 times the value which matches the size of a two |
| 5541 | // byte character. |
| 5542 | STATIC_ASSERT(kSmiTag == 0); |
| 5543 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 5544 | __ add(esi, Operand(ebx)); |
| 5545 | |
| 5546 | // eax: result string |
| 5547 | // ecx: result length |
| 5548 | // edx: original value of esi |
| 5549 | // edi: first character of result |
| 5550 | // esi: character of sub string start |
| 5551 | StringHelper::GenerateCopyCharactersREP(masm, edi, esi, ecx, ebx, false); |
| 5552 | __ mov(esi, edx); // Restore esi. |
| 5553 | |
| 5554 | __ bind(&return_eax); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 5555 | __ IncrementCounter(counters->sub_string_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5556 | __ ret(3 * kPointerSize); |
| 5557 | |
| 5558 | // Just jump to runtime to create the sub string. |
| 5559 | __ bind(&runtime); |
| 5560 | __ TailCallRuntime(Runtime::kSubString, 3, 1); |
| 5561 | } |
| 5562 | |
| 5563 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5564 | void StringCompareStub::GenerateFlatAsciiStringEquals(MacroAssembler* masm, |
| 5565 | Register left, |
| 5566 | Register right, |
| 5567 | Register scratch1, |
| 5568 | Register scratch2) { |
| 5569 | Register length = scratch1; |
| 5570 | |
| 5571 | // Compare lengths. |
| 5572 | Label strings_not_equal, check_zero_length; |
| 5573 | __ mov(length, FieldOperand(left, String::kLengthOffset)); |
| 5574 | __ cmp(length, FieldOperand(right, String::kLengthOffset)); |
| 5575 | __ j(equal, &check_zero_length, Label::kNear); |
| 5576 | __ bind(&strings_not_equal); |
| 5577 | __ Set(eax, Immediate(Smi::FromInt(NOT_EQUAL))); |
| 5578 | __ ret(0); |
| 5579 | |
| 5580 | // Check if the length is zero. |
| 5581 | Label compare_chars; |
| 5582 | __ bind(&check_zero_length); |
| 5583 | STATIC_ASSERT(kSmiTag == 0); |
| 5584 | __ test(length, Operand(length)); |
| 5585 | __ j(not_zero, &compare_chars, Label::kNear); |
| 5586 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 5587 | __ ret(0); |
| 5588 | |
| 5589 | // Compare characters. |
| 5590 | __ bind(&compare_chars); |
| 5591 | GenerateAsciiCharsCompareLoop(masm, left, right, length, scratch2, |
| 5592 | &strings_not_equal, Label::kNear); |
| 5593 | |
| 5594 | // Characters are equal. |
| 5595 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 5596 | __ ret(0); |
| 5597 | } |
| 5598 | |
| 5599 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5600 | void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm, |
| 5601 | Register left, |
| 5602 | Register right, |
| 5603 | Register scratch1, |
| 5604 | Register scratch2, |
| 5605 | Register scratch3) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 5606 | Counters* counters = masm->isolate()->counters(); |
| 5607 | __ IncrementCounter(counters->string_compare_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5608 | |
| 5609 | // Find minimum length. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5610 | Label left_shorter; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5611 | __ mov(scratch1, FieldOperand(left, String::kLengthOffset)); |
| 5612 | __ mov(scratch3, scratch1); |
| 5613 | __ sub(scratch3, FieldOperand(right, String::kLengthOffset)); |
| 5614 | |
| 5615 | Register length_delta = scratch3; |
| 5616 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5617 | __ j(less_equal, &left_shorter, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5618 | // Right string is shorter. Change scratch1 to be length of right string. |
| 5619 | __ sub(scratch1, Operand(length_delta)); |
| 5620 | __ bind(&left_shorter); |
| 5621 | |
| 5622 | Register min_length = scratch1; |
| 5623 | |
| 5624 | // If either length is zero, just compare lengths. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5625 | Label compare_lengths; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5626 | __ test(min_length, Operand(min_length)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5627 | __ j(zero, &compare_lengths, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5628 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5629 | // Compare characters. |
| 5630 | Label result_not_equal; |
| 5631 | GenerateAsciiCharsCompareLoop(masm, left, right, min_length, scratch2, |
| 5632 | &result_not_equal, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5633 | |
| 5634 | // Compare lengths - strings up to min-length are equal. |
| 5635 | __ bind(&compare_lengths); |
| 5636 | __ test(length_delta, Operand(length_delta)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5637 | __ j(not_zero, &result_not_equal, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5638 | |
| 5639 | // Result is EQUAL. |
| 5640 | STATIC_ASSERT(EQUAL == 0); |
| 5641 | STATIC_ASSERT(kSmiTag == 0); |
| 5642 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 5643 | __ ret(0); |
| 5644 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5645 | Label result_greater; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5646 | __ bind(&result_not_equal); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5647 | __ j(greater, &result_greater, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5648 | |
| 5649 | // Result is LESS. |
| 5650 | __ Set(eax, Immediate(Smi::FromInt(LESS))); |
| 5651 | __ ret(0); |
| 5652 | |
| 5653 | // Result is GREATER. |
| 5654 | __ bind(&result_greater); |
| 5655 | __ Set(eax, Immediate(Smi::FromInt(GREATER))); |
| 5656 | __ ret(0); |
| 5657 | } |
| 5658 | |
| 5659 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5660 | void StringCompareStub::GenerateAsciiCharsCompareLoop( |
| 5661 | MacroAssembler* masm, |
| 5662 | Register left, |
| 5663 | Register right, |
| 5664 | Register length, |
| 5665 | Register scratch, |
| 5666 | Label* chars_not_equal, |
| 5667 | Label::Distance chars_not_equal_near) { |
| 5668 | // Change index to run from -length to -1 by adding length to string |
| 5669 | // start. This means that loop ends when index reaches zero, which |
| 5670 | // doesn't need an additional compare. |
| 5671 | __ SmiUntag(length); |
| 5672 | __ lea(left, |
| 5673 | FieldOperand(left, length, times_1, SeqAsciiString::kHeaderSize)); |
| 5674 | __ lea(right, |
| 5675 | FieldOperand(right, length, times_1, SeqAsciiString::kHeaderSize)); |
| 5676 | __ neg(length); |
| 5677 | Register index = length; // index = -length; |
| 5678 | |
| 5679 | // Compare loop. |
| 5680 | Label loop; |
| 5681 | __ bind(&loop); |
| 5682 | __ mov_b(scratch, Operand(left, index, times_1, 0)); |
| 5683 | __ cmpb(scratch, Operand(right, index, times_1, 0)); |
| 5684 | __ j(not_equal, chars_not_equal, chars_not_equal_near); |
| 5685 | __ add(Operand(index), Immediate(1)); |
| 5686 | __ j(not_zero, &loop); |
| 5687 | } |
| 5688 | |
| 5689 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5690 | void StringCompareStub::Generate(MacroAssembler* masm) { |
| 5691 | Label runtime; |
| 5692 | |
| 5693 | // Stack frame on entry. |
| 5694 | // esp[0]: return address |
| 5695 | // esp[4]: right string |
| 5696 | // esp[8]: left string |
| 5697 | |
| 5698 | __ mov(edx, Operand(esp, 2 * kPointerSize)); // left |
| 5699 | __ mov(eax, Operand(esp, 1 * kPointerSize)); // right |
| 5700 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5701 | Label not_same; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5702 | __ cmp(edx, Operand(eax)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5703 | __ j(not_equal, ¬_same, Label::kNear); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5704 | STATIC_ASSERT(EQUAL == 0); |
| 5705 | STATIC_ASSERT(kSmiTag == 0); |
| 5706 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 5707 | __ IncrementCounter(masm->isolate()->counters()->string_compare_native(), 1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5708 | __ ret(2 * kPointerSize); |
| 5709 | |
| 5710 | __ bind(¬_same); |
| 5711 | |
| 5712 | // Check that both objects are sequential ascii strings. |
| 5713 | __ JumpIfNotBothSequentialAsciiStrings(edx, eax, ecx, ebx, &runtime); |
| 5714 | |
| 5715 | // Compare flat ascii strings. |
| 5716 | // Drop arguments from the stack. |
| 5717 | __ pop(ecx); |
| 5718 | __ add(Operand(esp), Immediate(2 * kPointerSize)); |
| 5719 | __ push(ecx); |
| 5720 | GenerateCompareFlatAsciiStrings(masm, edx, eax, ecx, ebx, edi); |
| 5721 | |
| 5722 | // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater) |
| 5723 | // tagged as a small integer. |
| 5724 | __ bind(&runtime); |
| 5725 | __ TailCallRuntime(Runtime::kStringCompare, 2, 1); |
| 5726 | } |
| 5727 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5728 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5729 | void ICCompareStub::GenerateSmis(MacroAssembler* masm) { |
| 5730 | ASSERT(state_ == CompareIC::SMIS); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5731 | Label miss; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5732 | __ mov(ecx, Operand(edx)); |
| 5733 | __ or_(ecx, Operand(eax)); |
| 5734 | __ test(ecx, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5735 | __ j(not_zero, &miss, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5736 | |
| 5737 | if (GetCondition() == equal) { |
| 5738 | // For equality we do not care about the sign of the result. |
| 5739 | __ sub(eax, Operand(edx)); |
| 5740 | } else { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5741 | Label done; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5742 | __ sub(edx, Operand(eax)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5743 | __ j(no_overflow, &done, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5744 | // Correct sign of result in case of overflow. |
| 5745 | __ not_(edx); |
| 5746 | __ bind(&done); |
| 5747 | __ mov(eax, edx); |
| 5748 | } |
| 5749 | __ ret(0); |
| 5750 | |
| 5751 | __ bind(&miss); |
| 5752 | GenerateMiss(masm); |
| 5753 | } |
| 5754 | |
| 5755 | |
| 5756 | void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) { |
| 5757 | ASSERT(state_ == CompareIC::HEAP_NUMBERS); |
| 5758 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5759 | Label generic_stub; |
| 5760 | Label unordered; |
| 5761 | Label miss; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5762 | __ mov(ecx, Operand(edx)); |
| 5763 | __ and_(ecx, Operand(eax)); |
| 5764 | __ test(ecx, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5765 | __ j(zero, &generic_stub, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5766 | |
| 5767 | __ CmpObjectType(eax, HEAP_NUMBER_TYPE, ecx); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5768 | __ j(not_equal, &miss, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5769 | __ CmpObjectType(edx, HEAP_NUMBER_TYPE, ecx); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5770 | __ j(not_equal, &miss, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5771 | |
| 5772 | // Inlining the double comparison and falling back to the general compare |
| 5773 | // stub if NaN is involved or SS2 or CMOV is unsupported. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 5774 | if (CpuFeatures::IsSupported(SSE2) && CpuFeatures::IsSupported(CMOV)) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5775 | CpuFeatures::Scope scope1(SSE2); |
| 5776 | CpuFeatures::Scope scope2(CMOV); |
| 5777 | |
| 5778 | // Load left and right operand |
| 5779 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 5780 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 5781 | |
| 5782 | // Compare operands |
| 5783 | __ ucomisd(xmm0, xmm1); |
| 5784 | |
| 5785 | // Don't base result on EFLAGS when a NaN is involved. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5786 | __ j(parity_even, &unordered, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5787 | |
| 5788 | // Return a result of -1, 0, or 1, based on EFLAGS. |
| 5789 | // Performing mov, because xor would destroy the flag register. |
| 5790 | __ mov(eax, 0); // equal |
| 5791 | __ mov(ecx, Immediate(Smi::FromInt(1))); |
| 5792 | __ cmov(above, eax, Operand(ecx)); |
| 5793 | __ mov(ecx, Immediate(Smi::FromInt(-1))); |
| 5794 | __ cmov(below, eax, Operand(ecx)); |
| 5795 | __ ret(0); |
| 5796 | |
| 5797 | __ bind(&unordered); |
| 5798 | } |
| 5799 | |
| 5800 | CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS); |
| 5801 | __ bind(&generic_stub); |
| 5802 | __ jmp(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 5803 | |
| 5804 | __ bind(&miss); |
| 5805 | GenerateMiss(masm); |
| 5806 | } |
| 5807 | |
| 5808 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5809 | void ICCompareStub::GenerateSymbols(MacroAssembler* masm) { |
| 5810 | ASSERT(state_ == CompareIC::SYMBOLS); |
| 5811 | ASSERT(GetCondition() == equal); |
| 5812 | |
| 5813 | // Registers containing left and right operands respectively. |
| 5814 | Register left = edx; |
| 5815 | Register right = eax; |
| 5816 | Register tmp1 = ecx; |
| 5817 | Register tmp2 = ebx; |
| 5818 | |
| 5819 | // Check that both operands are heap objects. |
| 5820 | Label miss; |
| 5821 | __ mov(tmp1, Operand(left)); |
| 5822 | STATIC_ASSERT(kSmiTag == 0); |
| 5823 | __ and_(tmp1, Operand(right)); |
| 5824 | __ test(tmp1, Immediate(kSmiTagMask)); |
| 5825 | __ j(zero, &miss, Label::kNear); |
| 5826 | |
| 5827 | // Check that both operands are symbols. |
| 5828 | __ mov(tmp1, FieldOperand(left, HeapObject::kMapOffset)); |
| 5829 | __ mov(tmp2, FieldOperand(right, HeapObject::kMapOffset)); |
| 5830 | __ movzx_b(tmp1, FieldOperand(tmp1, Map::kInstanceTypeOffset)); |
| 5831 | __ movzx_b(tmp2, FieldOperand(tmp2, Map::kInstanceTypeOffset)); |
| 5832 | STATIC_ASSERT(kSymbolTag != 0); |
| 5833 | __ and_(tmp1, Operand(tmp2)); |
| 5834 | __ test(tmp1, Immediate(kIsSymbolMask)); |
| 5835 | __ j(zero, &miss, Label::kNear); |
| 5836 | |
| 5837 | // Symbols are compared by identity. |
| 5838 | Label done; |
| 5839 | __ cmp(left, Operand(right)); |
| 5840 | // Make sure eax is non-zero. At this point input operands are |
| 5841 | // guaranteed to be non-zero. |
| 5842 | ASSERT(right.is(eax)); |
| 5843 | __ j(not_equal, &done, Label::kNear); |
| 5844 | STATIC_ASSERT(EQUAL == 0); |
| 5845 | STATIC_ASSERT(kSmiTag == 0); |
| 5846 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 5847 | __ bind(&done); |
| 5848 | __ ret(0); |
| 5849 | |
| 5850 | __ bind(&miss); |
| 5851 | GenerateMiss(masm); |
| 5852 | } |
| 5853 | |
| 5854 | |
| 5855 | void ICCompareStub::GenerateStrings(MacroAssembler* masm) { |
| 5856 | ASSERT(state_ == CompareIC::STRINGS); |
| 5857 | ASSERT(GetCondition() == equal); |
| 5858 | Label miss; |
| 5859 | |
| 5860 | // Registers containing left and right operands respectively. |
| 5861 | Register left = edx; |
| 5862 | Register right = eax; |
| 5863 | Register tmp1 = ecx; |
| 5864 | Register tmp2 = ebx; |
| 5865 | Register tmp3 = edi; |
| 5866 | |
| 5867 | // Check that both operands are heap objects. |
| 5868 | __ mov(tmp1, Operand(left)); |
| 5869 | STATIC_ASSERT(kSmiTag == 0); |
| 5870 | __ and_(tmp1, Operand(right)); |
| 5871 | __ test(tmp1, Immediate(kSmiTagMask)); |
| 5872 | __ j(zero, &miss); |
| 5873 | |
| 5874 | // Check that both operands are strings. This leaves the instance |
| 5875 | // types loaded in tmp1 and tmp2. |
| 5876 | __ mov(tmp1, FieldOperand(left, HeapObject::kMapOffset)); |
| 5877 | __ mov(tmp2, FieldOperand(right, HeapObject::kMapOffset)); |
| 5878 | __ movzx_b(tmp1, FieldOperand(tmp1, Map::kInstanceTypeOffset)); |
| 5879 | __ movzx_b(tmp2, FieldOperand(tmp2, Map::kInstanceTypeOffset)); |
| 5880 | __ mov(tmp3, tmp1); |
| 5881 | STATIC_ASSERT(kNotStringTag != 0); |
| 5882 | __ or_(tmp3, Operand(tmp2)); |
| 5883 | __ test(tmp3, Immediate(kIsNotStringMask)); |
| 5884 | __ j(not_zero, &miss); |
| 5885 | |
| 5886 | // Fast check for identical strings. |
| 5887 | Label not_same; |
| 5888 | __ cmp(left, Operand(right)); |
| 5889 | __ j(not_equal, ¬_same, Label::kNear); |
| 5890 | STATIC_ASSERT(EQUAL == 0); |
| 5891 | STATIC_ASSERT(kSmiTag == 0); |
| 5892 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 5893 | __ ret(0); |
| 5894 | |
| 5895 | // Handle not identical strings. |
| 5896 | __ bind(¬_same); |
| 5897 | |
| 5898 | // Check that both strings are symbols. If they are, we're done |
| 5899 | // because we already know they are not identical. |
| 5900 | Label do_compare; |
| 5901 | STATIC_ASSERT(kSymbolTag != 0); |
| 5902 | __ and_(tmp1, Operand(tmp2)); |
| 5903 | __ test(tmp1, Immediate(kIsSymbolMask)); |
| 5904 | __ j(zero, &do_compare, Label::kNear); |
| 5905 | // Make sure eax is non-zero. At this point input operands are |
| 5906 | // guaranteed to be non-zero. |
| 5907 | ASSERT(right.is(eax)); |
| 5908 | __ ret(0); |
| 5909 | |
| 5910 | // Check that both strings are sequential ASCII. |
| 5911 | Label runtime; |
| 5912 | __ bind(&do_compare); |
| 5913 | __ JumpIfNotBothSequentialAsciiStrings(left, right, tmp1, tmp2, &runtime); |
| 5914 | |
| 5915 | // Compare flat ASCII strings. Returns when done. |
| 5916 | StringCompareStub::GenerateFlatAsciiStringEquals( |
| 5917 | masm, left, right, tmp1, tmp2); |
| 5918 | |
| 5919 | // Handle more complex cases in runtime. |
| 5920 | __ bind(&runtime); |
| 5921 | __ pop(tmp1); // Return address. |
| 5922 | __ push(left); |
| 5923 | __ push(right); |
| 5924 | __ push(tmp1); |
| 5925 | __ TailCallRuntime(Runtime::kStringEquals, 2, 1); |
| 5926 | |
| 5927 | __ bind(&miss); |
| 5928 | GenerateMiss(masm); |
| 5929 | } |
| 5930 | |
| 5931 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5932 | void ICCompareStub::GenerateObjects(MacroAssembler* masm) { |
| 5933 | ASSERT(state_ == CompareIC::OBJECTS); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5934 | Label miss; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5935 | __ mov(ecx, Operand(edx)); |
| 5936 | __ and_(ecx, Operand(eax)); |
| 5937 | __ test(ecx, Immediate(kSmiTagMask)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5938 | __ j(zero, &miss, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5939 | |
| 5940 | __ CmpObjectType(eax, JS_OBJECT_TYPE, ecx); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5941 | __ j(not_equal, &miss, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5942 | __ CmpObjectType(edx, JS_OBJECT_TYPE, ecx); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5943 | __ j(not_equal, &miss, Label::kNear); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5944 | |
| 5945 | ASSERT(GetCondition() == equal); |
| 5946 | __ sub(eax, Operand(edx)); |
| 5947 | __ ret(0); |
| 5948 | |
| 5949 | __ bind(&miss); |
| 5950 | GenerateMiss(masm); |
| 5951 | } |
| 5952 | |
| 5953 | |
| 5954 | void ICCompareStub::GenerateMiss(MacroAssembler* masm) { |
| 5955 | // Save the registers. |
| 5956 | __ pop(ecx); |
| 5957 | __ push(edx); |
| 5958 | __ push(eax); |
| 5959 | __ push(ecx); |
| 5960 | |
| 5961 | // Call the runtime system in a fresh internal frame. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 5962 | ExternalReference miss = ExternalReference(IC_Utility(IC::kCompareIC_Miss), |
| 5963 | masm->isolate()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 5964 | __ EnterInternalFrame(); |
| 5965 | __ push(edx); |
| 5966 | __ push(eax); |
| 5967 | __ push(Immediate(Smi::FromInt(op_))); |
| 5968 | __ CallExternalReference(miss, 3); |
| 5969 | __ LeaveInternalFrame(); |
| 5970 | |
| 5971 | // Compute the entry point of the rewritten stub. |
| 5972 | __ lea(edi, FieldOperand(eax, Code::kHeaderSize)); |
| 5973 | |
| 5974 | // Restore registers. |
| 5975 | __ pop(ecx); |
| 5976 | __ pop(eax); |
| 5977 | __ pop(edx); |
| 5978 | __ push(ecx); |
| 5979 | |
| 5980 | // Do a tail call to the rewritten stub. |
| 5981 | __ jmp(Operand(edi)); |
| 5982 | } |
| 5983 | |
| 5984 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame^] | 5985 | // Helper function used to check that the dictionary doesn't contain |
| 5986 | // the property. This function may return false negatives, so miss_label |
| 5987 | // must always call a backup property check that is complete. |
| 5988 | // This function is safe to call if the receiver has fast properties. |
| 5989 | // Name must be a symbol and receiver must be a heap object. |
| 5990 | MaybeObject* StringDictionaryLookupStub::GenerateNegativeLookup( |
| 5991 | MacroAssembler* masm, |
| 5992 | Label* miss, |
| 5993 | Label* done, |
| 5994 | Register properties, |
| 5995 | String* name, |
| 5996 | Register r0) { |
| 5997 | ASSERT(name->IsSymbol()); |
| 5998 | |
| 5999 | // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| 6000 | // not equal to the name and kProbes-th slot is not used (its name is the |
| 6001 | // undefined value), it guarantees the hash table doesn't contain the |
| 6002 | // property. It's true even if some slots represent deleted properties |
| 6003 | // (their names are the null value). |
| 6004 | for (int i = 0; i < kInlinedProbes; i++) { |
| 6005 | // Compute the masked index: (hash + i + i * i) & mask. |
| 6006 | Register index = r0; |
| 6007 | // Capacity is smi 2^n. |
| 6008 | __ mov(index, FieldOperand(properties, kCapacityOffset)); |
| 6009 | __ dec(index); |
| 6010 | __ and_(Operand(index), |
| 6011 | Immediate(Smi::FromInt(name->Hash() + |
| 6012 | StringDictionary::GetProbeOffset(i)))); |
| 6013 | |
| 6014 | // Scale the index by multiplying by the entry size. |
| 6015 | ASSERT(StringDictionary::kEntrySize == 3); |
| 6016 | __ lea(index, Operand(index, index, times_2, 0)); // index *= 3. |
| 6017 | Register entity_name = r0; |
| 6018 | // Having undefined at this place means the name is not contained. |
| 6019 | ASSERT_EQ(kSmiTagSize, 1); |
| 6020 | __ mov(entity_name, Operand(properties, index, times_half_pointer_size, |
| 6021 | kElementsStartOffset - kHeapObjectTag)); |
| 6022 | __ cmp(entity_name, masm->isolate()->factory()->undefined_value()); |
| 6023 | __ j(equal, done); |
| 6024 | |
| 6025 | // Stop if found the property. |
| 6026 | __ cmp(entity_name, Handle<String>(name)); |
| 6027 | __ j(equal, miss); |
| 6028 | |
| 6029 | // Check if the entry name is not a symbol. |
| 6030 | __ mov(entity_name, FieldOperand(entity_name, HeapObject::kMapOffset)); |
| 6031 | __ test_b(FieldOperand(entity_name, Map::kInstanceTypeOffset), |
| 6032 | kIsSymbolMask); |
| 6033 | __ j(zero, miss); |
| 6034 | } |
| 6035 | |
| 6036 | StringDictionaryLookupStub stub(properties, |
| 6037 | r0, |
| 6038 | r0, |
| 6039 | StringDictionaryLookupStub::NEGATIVE_LOOKUP); |
| 6040 | __ push(Immediate(Handle<Object>(name))); |
| 6041 | __ push(Immediate(name->Hash())); |
| 6042 | MaybeObject* result = masm->TryCallStub(&stub); |
| 6043 | if (result->IsFailure()) return result; |
| 6044 | __ test(r0, Operand(r0)); |
| 6045 | __ j(not_zero, miss); |
| 6046 | __ jmp(done); |
| 6047 | return result; |
| 6048 | } |
| 6049 | |
| 6050 | |
| 6051 | // Probe the string dictionary in the |elements| register. Jump to the |
| 6052 | // |done| label if a property with the given name is found leaving the |
| 6053 | // index into the dictionary in |r0|. Jump to the |miss| label |
| 6054 | // otherwise. |
| 6055 | void StringDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm, |
| 6056 | Label* miss, |
| 6057 | Label* done, |
| 6058 | Register elements, |
| 6059 | Register name, |
| 6060 | Register r0, |
| 6061 | Register r1) { |
| 6062 | // Assert that name contains a string. |
| 6063 | if (FLAG_debug_code) __ AbortIfNotString(name); |
| 6064 | |
| 6065 | __ mov(r1, FieldOperand(elements, kCapacityOffset)); |
| 6066 | __ shr(r1, kSmiTagSize); // convert smi to int |
| 6067 | __ dec(r1); |
| 6068 | |
| 6069 | // Generate an unrolled loop that performs a few probes before |
| 6070 | // giving up. Measurements done on Gmail indicate that 2 probes |
| 6071 | // cover ~93% of loads from dictionaries. |
| 6072 | for (int i = 0; i < kInlinedProbes; i++) { |
| 6073 | // Compute the masked index: (hash + i + i * i) & mask. |
| 6074 | __ mov(r0, FieldOperand(name, String::kHashFieldOffset)); |
| 6075 | __ shr(r0, String::kHashShift); |
| 6076 | if (i > 0) { |
| 6077 | __ add(Operand(r0), Immediate(StringDictionary::GetProbeOffset(i))); |
| 6078 | } |
| 6079 | __ and_(r0, Operand(r1)); |
| 6080 | |
| 6081 | // Scale the index by multiplying by the entry size. |
| 6082 | ASSERT(StringDictionary::kEntrySize == 3); |
| 6083 | __ lea(r0, Operand(r0, r0, times_2, 0)); // r0 = r0 * 3 |
| 6084 | |
| 6085 | // Check if the key is identical to the name. |
| 6086 | __ cmp(name, Operand(elements, |
| 6087 | r0, |
| 6088 | times_4, |
| 6089 | kElementsStartOffset - kHeapObjectTag)); |
| 6090 | __ j(equal, done); |
| 6091 | } |
| 6092 | |
| 6093 | StringDictionaryLookupStub stub(elements, |
| 6094 | r1, |
| 6095 | r0, |
| 6096 | POSITIVE_LOOKUP); |
| 6097 | __ push(name); |
| 6098 | __ mov(r0, FieldOperand(name, String::kHashFieldOffset)); |
| 6099 | __ shr(r0, String::kHashShift); |
| 6100 | __ push(r0); |
| 6101 | __ CallStub(&stub); |
| 6102 | |
| 6103 | __ test(r1, Operand(r1)); |
| 6104 | __ j(zero, miss); |
| 6105 | __ jmp(done); |
| 6106 | } |
| 6107 | |
| 6108 | |
| 6109 | void StringDictionaryLookupStub::Generate(MacroAssembler* masm) { |
| 6110 | // Stack frame on entry: |
| 6111 | // esp[0 * kPointerSize]: return address. |
| 6112 | // esp[1 * kPointerSize]: key's hash. |
| 6113 | // esp[2 * kPointerSize]: key. |
| 6114 | // Registers: |
| 6115 | // dictionary_: StringDictionary to probe. |
| 6116 | // result_: used as scratch. |
| 6117 | // index_: will hold an index of entry if lookup is successful. |
| 6118 | // might alias with result_. |
| 6119 | // Returns: |
| 6120 | // result_ is zero if lookup failed, non zero otherwise. |
| 6121 | |
| 6122 | Label in_dictionary, maybe_in_dictionary, not_in_dictionary; |
| 6123 | |
| 6124 | Register scratch = result_; |
| 6125 | |
| 6126 | __ mov(scratch, FieldOperand(dictionary_, kCapacityOffset)); |
| 6127 | __ dec(scratch); |
| 6128 | __ SmiUntag(scratch); |
| 6129 | __ push(scratch); |
| 6130 | |
| 6131 | // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| 6132 | // not equal to the name and kProbes-th slot is not used (its name is the |
| 6133 | // undefined value), it guarantees the hash table doesn't contain the |
| 6134 | // property. It's true even if some slots represent deleted properties |
| 6135 | // (their names are the null value). |
| 6136 | for (int i = kInlinedProbes; i < kTotalProbes; i++) { |
| 6137 | // Compute the masked index: (hash + i + i * i) & mask. |
| 6138 | __ mov(scratch, Operand(esp, 2 * kPointerSize)); |
| 6139 | if (i > 0) { |
| 6140 | __ add(Operand(scratch), |
| 6141 | Immediate(StringDictionary::GetProbeOffset(i))); |
| 6142 | } |
| 6143 | __ and_(scratch, Operand(esp, 0)); |
| 6144 | |
| 6145 | // Scale the index by multiplying by the entry size. |
| 6146 | ASSERT(StringDictionary::kEntrySize == 3); |
| 6147 | __ lea(index_, Operand(scratch, scratch, times_2, 0)); // index *= 3. |
| 6148 | |
| 6149 | // Having undefined at this place means the name is not contained. |
| 6150 | ASSERT_EQ(kSmiTagSize, 1); |
| 6151 | __ mov(scratch, Operand(dictionary_, |
| 6152 | index_, |
| 6153 | times_pointer_size, |
| 6154 | kElementsStartOffset - kHeapObjectTag)); |
| 6155 | __ cmp(scratch, masm->isolate()->factory()->undefined_value()); |
| 6156 | __ j(equal, ¬_in_dictionary); |
| 6157 | |
| 6158 | // Stop if found the property. |
| 6159 | __ cmp(scratch, Operand(esp, 3 * kPointerSize)); |
| 6160 | __ j(equal, &in_dictionary); |
| 6161 | |
| 6162 | if (i != kTotalProbes - 1 && mode_ == NEGATIVE_LOOKUP) { |
| 6163 | // If we hit a non symbol key during negative lookup |
| 6164 | // we have to bailout as this key might be equal to the |
| 6165 | // key we are looking for. |
| 6166 | |
| 6167 | // Check if the entry name is not a symbol. |
| 6168 | __ mov(scratch, FieldOperand(scratch, HeapObject::kMapOffset)); |
| 6169 | __ test_b(FieldOperand(scratch, Map::kInstanceTypeOffset), |
| 6170 | kIsSymbolMask); |
| 6171 | __ j(zero, &maybe_in_dictionary); |
| 6172 | } |
| 6173 | } |
| 6174 | |
| 6175 | __ bind(&maybe_in_dictionary); |
| 6176 | // If we are doing negative lookup then probing failure should be |
| 6177 | // treated as a lookup success. For positive lookup probing failure |
| 6178 | // should be treated as lookup failure. |
| 6179 | if (mode_ == POSITIVE_LOOKUP) { |
| 6180 | __ mov(result_, Immediate(0)); |
| 6181 | __ Drop(1); |
| 6182 | __ ret(2 * kPointerSize); |
| 6183 | } |
| 6184 | |
| 6185 | __ bind(&in_dictionary); |
| 6186 | __ mov(result_, Immediate(1)); |
| 6187 | __ Drop(1); |
| 6188 | __ ret(2 * kPointerSize); |
| 6189 | |
| 6190 | __ bind(¬_in_dictionary); |
| 6191 | __ mov(result_, Immediate(0)); |
| 6192 | __ Drop(1); |
| 6193 | __ ret(2 * kPointerSize); |
| 6194 | } |
| 6195 | |
| 6196 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 6197 | #undef __ |
| 6198 | |
| 6199 | } } // namespace v8::internal |
| 6200 | |
| 6201 | #endif // V8_TARGET_ARCH_IA32 |