ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1 | // Copyright 2010 the V8 project authors. All rights reserved. |
| 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 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 32 | #include "code-stubs.h" |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 33 | #include "bootstrapper.h" |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 34 | #include "jsregexp.h" |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 35 | #include "regexp-macro-assembler.h" |
| 36 | |
| 37 | namespace v8 { |
| 38 | namespace internal { |
| 39 | |
| 40 | #define __ ACCESS_MASM(masm) |
| 41 | void FastNewClosureStub::Generate(MacroAssembler* masm) { |
| 42 | // Create a new closure from the given function info in new |
| 43 | // space. Set the context to the current context in esi. |
| 44 | Label gc; |
| 45 | __ AllocateInNewSpace(JSFunction::kSize, eax, ebx, ecx, &gc, TAG_OBJECT); |
| 46 | |
| 47 | // Get the function info from the stack. |
| 48 | __ mov(edx, Operand(esp, 1 * kPointerSize)); |
| 49 | |
| 50 | // Compute the function map in the current global context and set that |
| 51 | // as the map of the allocated object. |
| 52 | __ mov(ecx, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 53 | __ mov(ecx, FieldOperand(ecx, GlobalObject::kGlobalContextOffset)); |
| 54 | __ mov(ecx, Operand(ecx, Context::SlotOffset(Context::FUNCTION_MAP_INDEX))); |
| 55 | __ mov(FieldOperand(eax, JSObject::kMapOffset), ecx); |
| 56 | |
| 57 | // Initialize the rest of the function. We don't have to update the |
| 58 | // write barrier because the allocated object is in new space. |
| 59 | __ mov(ebx, Immediate(Factory::empty_fixed_array())); |
| 60 | __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), ebx); |
| 61 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), ebx); |
| 62 | __ mov(FieldOperand(eax, JSFunction::kPrototypeOrInitialMapOffset), |
| 63 | Immediate(Factory::the_hole_value())); |
| 64 | __ mov(FieldOperand(eax, JSFunction::kSharedFunctionInfoOffset), edx); |
| 65 | __ mov(FieldOperand(eax, JSFunction::kContextOffset), esi); |
| 66 | __ mov(FieldOperand(eax, JSFunction::kLiteralsOffset), ebx); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 67 | __ mov(FieldOperand(eax, JSFunction::kNextFunctionLinkOffset), |
| 68 | Immediate(Factory::undefined_value())); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 69 | |
| 70 | // Initialize the code pointer in the function to be the one |
| 71 | // found in the shared function info object. |
| 72 | __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset)); |
| 73 | __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); |
| 74 | __ mov(FieldOperand(eax, JSFunction::kCodeEntryOffset), edx); |
| 75 | |
| 76 | // Return and remove the on-stack parameter. |
| 77 | __ ret(1 * kPointerSize); |
| 78 | |
| 79 | // Create a new closure through the slower runtime call. |
| 80 | __ bind(&gc); |
| 81 | __ pop(ecx); // Temporarily remove return address. |
| 82 | __ pop(edx); |
| 83 | __ push(esi); |
| 84 | __ push(edx); |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 85 | __ push(Immediate(Factory::false_value())); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 86 | __ push(ecx); // Restore return address. |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 87 | __ TailCallRuntime(Runtime::kNewClosure, 3, 1); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | |
| 91 | void FastNewContextStub::Generate(MacroAssembler* masm) { |
| 92 | // Try to allocate the context in new space. |
| 93 | Label gc; |
| 94 | int length = slots_ + Context::MIN_CONTEXT_SLOTS; |
| 95 | __ AllocateInNewSpace((length * kPointerSize) + FixedArray::kHeaderSize, |
| 96 | eax, ebx, ecx, &gc, TAG_OBJECT); |
| 97 | |
| 98 | // Get the function from the stack. |
| 99 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); |
| 100 | |
| 101 | // Setup the object header. |
| 102 | __ mov(FieldOperand(eax, HeapObject::kMapOffset), Factory::context_map()); |
| 103 | __ mov(FieldOperand(eax, Context::kLengthOffset), |
| 104 | Immediate(Smi::FromInt(length))); |
| 105 | |
| 106 | // Setup the fixed slots. |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 107 | __ Set(ebx, Immediate(0)); // Set to NULL. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 108 | __ mov(Operand(eax, Context::SlotOffset(Context::CLOSURE_INDEX)), ecx); |
| 109 | __ mov(Operand(eax, Context::SlotOffset(Context::FCONTEXT_INDEX)), eax); |
| 110 | __ mov(Operand(eax, Context::SlotOffset(Context::PREVIOUS_INDEX)), ebx); |
| 111 | __ mov(Operand(eax, Context::SlotOffset(Context::EXTENSION_INDEX)), ebx); |
| 112 | |
| 113 | // Copy the global object from the surrounding context. We go through the |
| 114 | // context in the function (ecx) to match the allocation behavior we have |
| 115 | // in the runtime system (see Heap::AllocateFunctionContext). |
| 116 | __ mov(ebx, FieldOperand(ecx, JSFunction::kContextOffset)); |
| 117 | __ mov(ebx, Operand(ebx, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 118 | __ mov(Operand(eax, Context::SlotOffset(Context::GLOBAL_INDEX)), ebx); |
| 119 | |
| 120 | // Initialize the rest of the slots to undefined. |
| 121 | __ mov(ebx, Factory::undefined_value()); |
| 122 | for (int i = Context::MIN_CONTEXT_SLOTS; i < length; i++) { |
| 123 | __ mov(Operand(eax, Context::SlotOffset(i)), ebx); |
| 124 | } |
| 125 | |
| 126 | // Return and remove the on-stack parameter. |
| 127 | __ mov(esi, Operand(eax)); |
| 128 | __ ret(1 * kPointerSize); |
| 129 | |
| 130 | // Need to collect. Call into runtime system. |
| 131 | __ bind(&gc); |
| 132 | __ TailCallRuntime(Runtime::kNewContext, 1, 1); |
| 133 | } |
| 134 | |
| 135 | |
| 136 | void FastCloneShallowArrayStub::Generate(MacroAssembler* masm) { |
| 137 | // Stack layout on entry: |
| 138 | // |
| 139 | // [esp + kPointerSize]: constant elements. |
| 140 | // [esp + (2 * kPointerSize)]: literal index. |
| 141 | // [esp + (3 * kPointerSize)]: literals array. |
| 142 | |
| 143 | // All sizes here are multiples of kPointerSize. |
| 144 | int elements_size = (length_ > 0) ? FixedArray::SizeFor(length_) : 0; |
| 145 | int size = JSArray::kSize + elements_size; |
| 146 | |
| 147 | // Load boilerplate object into ecx and check if we need to create a |
| 148 | // boilerplate. |
| 149 | Label slow_case; |
| 150 | __ mov(ecx, Operand(esp, 3 * kPointerSize)); |
| 151 | __ mov(eax, Operand(esp, 2 * kPointerSize)); |
| 152 | STATIC_ASSERT(kPointerSize == 4); |
| 153 | STATIC_ASSERT(kSmiTagSize == 1); |
| 154 | STATIC_ASSERT(kSmiTag == 0); |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 155 | __ mov(ecx, FieldOperand(ecx, eax, times_half_pointer_size, |
| 156 | FixedArray::kHeaderSize)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 157 | __ cmp(ecx, Factory::undefined_value()); |
| 158 | __ j(equal, &slow_case); |
| 159 | |
| 160 | if (FLAG_debug_code) { |
| 161 | const char* message; |
| 162 | Handle<Map> expected_map; |
| 163 | if (mode_ == CLONE_ELEMENTS) { |
| 164 | message = "Expected (writable) fixed array"; |
| 165 | expected_map = Factory::fixed_array_map(); |
| 166 | } else { |
| 167 | ASSERT(mode_ == COPY_ON_WRITE_ELEMENTS); |
| 168 | message = "Expected copy-on-write fixed array"; |
| 169 | expected_map = Factory::fixed_cow_array_map(); |
| 170 | } |
| 171 | __ push(ecx); |
| 172 | __ mov(ecx, FieldOperand(ecx, JSArray::kElementsOffset)); |
| 173 | __ cmp(FieldOperand(ecx, HeapObject::kMapOffset), expected_map); |
| 174 | __ Assert(equal, message); |
| 175 | __ pop(ecx); |
| 176 | } |
| 177 | |
| 178 | // Allocate both the JS array and the elements array in one big |
| 179 | // allocation. This avoids multiple limit checks. |
| 180 | __ AllocateInNewSpace(size, eax, ebx, edx, &slow_case, TAG_OBJECT); |
| 181 | |
| 182 | // Copy the JS array part. |
| 183 | for (int i = 0; i < JSArray::kSize; i += kPointerSize) { |
| 184 | if ((i != JSArray::kElementsOffset) || (length_ == 0)) { |
| 185 | __ mov(ebx, FieldOperand(ecx, i)); |
| 186 | __ mov(FieldOperand(eax, i), ebx); |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | if (length_ > 0) { |
| 191 | // Get hold of the elements array of the boilerplate and setup the |
| 192 | // elements pointer in the resulting object. |
| 193 | __ mov(ecx, FieldOperand(ecx, JSArray::kElementsOffset)); |
| 194 | __ lea(edx, Operand(eax, JSArray::kSize)); |
| 195 | __ mov(FieldOperand(eax, JSArray::kElementsOffset), edx); |
| 196 | |
| 197 | // Copy the elements array. |
| 198 | for (int i = 0; i < elements_size; i += kPointerSize) { |
| 199 | __ mov(ebx, FieldOperand(ecx, i)); |
| 200 | __ mov(FieldOperand(edx, i), ebx); |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | // Return and remove the on-stack parameters. |
| 205 | __ ret(3 * kPointerSize); |
| 206 | |
| 207 | __ bind(&slow_case); |
| 208 | __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1); |
| 209 | } |
| 210 | |
| 211 | |
| 212 | // NOTE: The stub does not handle the inlined cases (Smis, Booleans, undefined). |
| 213 | void ToBooleanStub::Generate(MacroAssembler* masm) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 214 | NearLabel false_result, true_result, not_string; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 215 | __ mov(eax, Operand(esp, 1 * kPointerSize)); |
| 216 | |
| 217 | // 'null' => false. |
| 218 | __ cmp(eax, Factory::null_value()); |
| 219 | __ j(equal, &false_result); |
| 220 | |
| 221 | // Get the map and type of the heap object. |
| 222 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 223 | __ movzx_b(ecx, FieldOperand(edx, Map::kInstanceTypeOffset)); |
| 224 | |
| 225 | // Undetectable => false. |
| 226 | __ test_b(FieldOperand(edx, Map::kBitFieldOffset), |
| 227 | 1 << Map::kIsUndetectable); |
| 228 | __ j(not_zero, &false_result); |
| 229 | |
| 230 | // JavaScript object => true. |
| 231 | __ CmpInstanceType(edx, FIRST_JS_OBJECT_TYPE); |
| 232 | __ j(above_equal, &true_result); |
| 233 | |
| 234 | // String value => false iff empty. |
| 235 | __ CmpInstanceType(edx, FIRST_NONSTRING_TYPE); |
| 236 | __ j(above_equal, ¬_string); |
| 237 | STATIC_ASSERT(kSmiTag == 0); |
| 238 | __ cmp(FieldOperand(eax, String::kLengthOffset), Immediate(0)); |
| 239 | __ j(zero, &false_result); |
| 240 | __ jmp(&true_result); |
| 241 | |
| 242 | __ bind(¬_string); |
| 243 | // HeapNumber => false iff +0, -0, or NaN. |
| 244 | __ cmp(edx, Factory::heap_number_map()); |
| 245 | __ j(not_equal, &true_result); |
| 246 | __ fldz(); |
| 247 | __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 248 | __ FCmp(); |
| 249 | __ j(zero, &false_result); |
| 250 | // Fall through to |true_result|. |
| 251 | |
| 252 | // Return 1/0 for true/false in eax. |
| 253 | __ bind(&true_result); |
| 254 | __ mov(eax, 1); |
| 255 | __ ret(1 * kPointerSize); |
| 256 | __ bind(&false_result); |
| 257 | __ mov(eax, 0); |
| 258 | __ ret(1 * kPointerSize); |
| 259 | } |
| 260 | |
| 261 | |
| 262 | const char* GenericBinaryOpStub::GetName() { |
| 263 | if (name_ != NULL) return name_; |
| 264 | const int kMaxNameLength = 100; |
| 265 | name_ = Bootstrapper::AllocateAutoDeletedArray(kMaxNameLength); |
| 266 | if (name_ == NULL) return "OOM"; |
| 267 | const char* op_name = Token::Name(op_); |
| 268 | const char* overwrite_name; |
| 269 | switch (mode_) { |
| 270 | case NO_OVERWRITE: overwrite_name = "Alloc"; break; |
| 271 | case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break; |
| 272 | case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break; |
| 273 | default: overwrite_name = "UnknownOverwrite"; break; |
| 274 | } |
| 275 | |
| 276 | OS::SNPrintF(Vector<char>(name_, kMaxNameLength), |
| 277 | "GenericBinaryOpStub_%s_%s%s_%s%s_%s_%s", |
| 278 | op_name, |
| 279 | overwrite_name, |
| 280 | (flags_ & NO_SMI_CODE_IN_STUB) ? "_NoSmiInStub" : "", |
| 281 | args_in_registers_ ? "RegArgs" : "StackArgs", |
| 282 | args_reversed_ ? "_R" : "", |
| 283 | static_operands_type_.ToString(), |
| 284 | BinaryOpIC::GetName(runtime_operands_type_)); |
| 285 | return name_; |
| 286 | } |
| 287 | |
| 288 | |
| 289 | void GenericBinaryOpStub::GenerateCall( |
| 290 | MacroAssembler* masm, |
| 291 | Register left, |
| 292 | Register right) { |
| 293 | if (!ArgsInRegistersSupported()) { |
| 294 | // Pass arguments on the stack. |
| 295 | __ push(left); |
| 296 | __ push(right); |
| 297 | } else { |
| 298 | // The calling convention with registers is left in edx and right in eax. |
| 299 | Register left_arg = edx; |
| 300 | Register right_arg = eax; |
| 301 | if (!(left.is(left_arg) && right.is(right_arg))) { |
| 302 | if (left.is(right_arg) && right.is(left_arg)) { |
| 303 | if (IsOperationCommutative()) { |
| 304 | SetArgsReversed(); |
| 305 | } else { |
| 306 | __ xchg(left, right); |
| 307 | } |
| 308 | } else if (left.is(left_arg)) { |
| 309 | __ mov(right_arg, right); |
| 310 | } else if (right.is(right_arg)) { |
| 311 | __ mov(left_arg, left); |
| 312 | } else if (left.is(right_arg)) { |
| 313 | if (IsOperationCommutative()) { |
| 314 | __ mov(left_arg, right); |
| 315 | SetArgsReversed(); |
| 316 | } else { |
| 317 | // Order of moves important to avoid destroying left argument. |
| 318 | __ mov(left_arg, left); |
| 319 | __ mov(right_arg, right); |
| 320 | } |
| 321 | } else if (right.is(left_arg)) { |
| 322 | if (IsOperationCommutative()) { |
| 323 | __ mov(right_arg, left); |
| 324 | SetArgsReversed(); |
| 325 | } else { |
| 326 | // Order of moves important to avoid destroying right argument. |
| 327 | __ mov(right_arg, right); |
| 328 | __ mov(left_arg, left); |
| 329 | } |
| 330 | } else { |
| 331 | // Order of moves is not important. |
| 332 | __ mov(left_arg, left); |
| 333 | __ mov(right_arg, right); |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | // Update flags to indicate that arguments are in registers. |
| 338 | SetArgsInRegisters(); |
| 339 | __ IncrementCounter(&Counters::generic_binary_stub_calls_regs, 1); |
| 340 | } |
| 341 | |
| 342 | // Call the stub. |
| 343 | __ CallStub(this); |
| 344 | } |
| 345 | |
| 346 | |
| 347 | void GenericBinaryOpStub::GenerateCall( |
| 348 | MacroAssembler* masm, |
| 349 | Register left, |
| 350 | Smi* right) { |
| 351 | if (!ArgsInRegistersSupported()) { |
| 352 | // Pass arguments on the stack. |
| 353 | __ push(left); |
| 354 | __ push(Immediate(right)); |
| 355 | } else { |
| 356 | // The calling convention with registers is left in edx and right in eax. |
| 357 | Register left_arg = edx; |
| 358 | Register right_arg = eax; |
| 359 | if (left.is(left_arg)) { |
| 360 | __ mov(right_arg, Immediate(right)); |
| 361 | } else if (left.is(right_arg) && IsOperationCommutative()) { |
| 362 | __ mov(left_arg, Immediate(right)); |
| 363 | SetArgsReversed(); |
| 364 | } else { |
| 365 | // For non-commutative operations, left and right_arg might be |
| 366 | // the same register. Therefore, the order of the moves is |
| 367 | // important here in order to not overwrite left before moving |
| 368 | // it to left_arg. |
| 369 | __ mov(left_arg, left); |
| 370 | __ mov(right_arg, Immediate(right)); |
| 371 | } |
| 372 | |
| 373 | // Update flags to indicate that arguments are in registers. |
| 374 | SetArgsInRegisters(); |
| 375 | __ IncrementCounter(&Counters::generic_binary_stub_calls_regs, 1); |
| 376 | } |
| 377 | |
| 378 | // Call the stub. |
| 379 | __ CallStub(this); |
| 380 | } |
| 381 | |
| 382 | |
| 383 | void GenericBinaryOpStub::GenerateCall( |
| 384 | MacroAssembler* masm, |
| 385 | Smi* left, |
| 386 | Register right) { |
| 387 | if (!ArgsInRegistersSupported()) { |
| 388 | // Pass arguments on the stack. |
| 389 | __ push(Immediate(left)); |
| 390 | __ push(right); |
| 391 | } else { |
| 392 | // The calling convention with registers is left in edx and right in eax. |
| 393 | Register left_arg = edx; |
| 394 | Register right_arg = eax; |
| 395 | if (right.is(right_arg)) { |
| 396 | __ mov(left_arg, Immediate(left)); |
| 397 | } else if (right.is(left_arg) && IsOperationCommutative()) { |
| 398 | __ mov(right_arg, Immediate(left)); |
| 399 | SetArgsReversed(); |
| 400 | } else { |
| 401 | // For non-commutative operations, right and left_arg might be |
| 402 | // the same register. Therefore, the order of the moves is |
| 403 | // important here in order to not overwrite right before moving |
| 404 | // it to right_arg. |
| 405 | __ mov(right_arg, right); |
| 406 | __ mov(left_arg, Immediate(left)); |
| 407 | } |
| 408 | // Update flags to indicate that arguments are in registers. |
| 409 | SetArgsInRegisters(); |
| 410 | __ IncrementCounter(&Counters::generic_binary_stub_calls_regs, 1); |
| 411 | } |
| 412 | |
| 413 | // Call the stub. |
| 414 | __ CallStub(this); |
| 415 | } |
| 416 | |
| 417 | |
| 418 | class FloatingPointHelper : public AllStatic { |
| 419 | public: |
| 420 | |
| 421 | enum ArgLocation { |
| 422 | ARGS_ON_STACK, |
| 423 | ARGS_IN_REGISTERS |
| 424 | }; |
| 425 | |
| 426 | // Code pattern for loading a floating point value. Input value must |
| 427 | // be either a smi or a heap number object (fp value). Requirements: |
| 428 | // operand in register number. Returns operand as floating point number |
| 429 | // on FPU stack. |
| 430 | static void LoadFloatOperand(MacroAssembler* masm, Register number); |
| 431 | |
| 432 | // Code pattern for loading floating point values. Input values must |
| 433 | // be either smi or heap number objects (fp values). Requirements: |
| 434 | // operand_1 on TOS+1 or in edx, operand_2 on TOS+2 or in eax. |
| 435 | // Returns operands as floating point numbers on FPU stack. |
| 436 | static void LoadFloatOperands(MacroAssembler* masm, |
| 437 | Register scratch, |
| 438 | ArgLocation arg_location = ARGS_ON_STACK); |
| 439 | |
| 440 | // Similar to LoadFloatOperand but assumes that both operands are smis. |
| 441 | // Expects operands in edx, eax. |
| 442 | static void LoadFloatSmis(MacroAssembler* masm, Register scratch); |
| 443 | |
| 444 | // Test if operands are smi or number objects (fp). Requirements: |
| 445 | // operand_1 in eax, operand_2 in edx; falls through on float |
| 446 | // operands, jumps to the non_float label otherwise. |
| 447 | static void CheckFloatOperands(MacroAssembler* masm, |
| 448 | Label* non_float, |
| 449 | Register scratch); |
| 450 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 451 | // Checks that the two floating point numbers on top of the FPU stack |
| 452 | // have int32 values. |
| 453 | static void CheckFloatOperandsAreInt32(MacroAssembler* masm, |
| 454 | Label* non_int32); |
| 455 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 456 | // Takes the operands in edx and eax and loads them as integers in eax |
| 457 | // and ecx. |
| 458 | static void LoadAsIntegers(MacroAssembler* masm, |
| 459 | TypeInfo type_info, |
| 460 | bool use_sse3, |
| 461 | Label* operand_conversion_failure); |
| 462 | static void LoadNumbersAsIntegers(MacroAssembler* masm, |
| 463 | TypeInfo type_info, |
| 464 | bool use_sse3, |
| 465 | Label* operand_conversion_failure); |
| 466 | static void LoadUnknownsAsIntegers(MacroAssembler* masm, |
| 467 | bool use_sse3, |
| 468 | Label* operand_conversion_failure); |
| 469 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 470 | // Must only be called after LoadUnknownsAsIntegers. Assumes that the |
| 471 | // operands are pushed on the stack, and that their conversions to int32 |
| 472 | // are in eax and ecx. Checks that the original numbers were in the int32 |
| 473 | // range. |
| 474 | static void CheckLoadedIntegersWereInt32(MacroAssembler* masm, |
| 475 | bool use_sse3, |
| 476 | Label* not_int32); |
| 477 | |
| 478 | // Assumes that operands are smis or heap numbers and loads them |
| 479 | // into xmm0 and xmm1. Operands are in edx and eax. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 480 | // Leaves operands unchanged. |
| 481 | static void LoadSSE2Operands(MacroAssembler* masm); |
| 482 | |
| 483 | // Test if operands are numbers (smi or HeapNumber objects), and load |
| 484 | // them into xmm0 and xmm1 if they are. Jump to label not_numbers if |
| 485 | // either operand is not a number. Operands are in edx and eax. |
| 486 | // Leaves operands unchanged. |
| 487 | static void LoadSSE2Operands(MacroAssembler* masm, Label* not_numbers); |
| 488 | |
| 489 | // Similar to LoadSSE2Operands but assumes that both operands are smis. |
| 490 | // Expects operands in edx, eax. |
| 491 | static void LoadSSE2Smis(MacroAssembler* masm, Register scratch); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 492 | |
| 493 | // Checks that the two floating point numbers loaded into xmm0 and xmm1 |
| 494 | // have int32 values. |
| 495 | static void CheckSSE2OperandsAreInt32(MacroAssembler* masm, |
| 496 | Label* non_int32, |
| 497 | Register scratch); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 498 | }; |
| 499 | |
| 500 | |
| 501 | void GenericBinaryOpStub::GenerateSmiCode(MacroAssembler* masm, Label* slow) { |
| 502 | // 1. Move arguments into edx, eax except for DIV and MOD, which need the |
| 503 | // dividend in eax and edx free for the division. Use eax, ebx for those. |
| 504 | Comment load_comment(masm, "-- Load arguments"); |
| 505 | Register left = edx; |
| 506 | Register right = eax; |
| 507 | if (op_ == Token::DIV || op_ == Token::MOD) { |
| 508 | left = eax; |
| 509 | right = ebx; |
| 510 | if (HasArgsInRegisters()) { |
| 511 | __ mov(ebx, eax); |
| 512 | __ mov(eax, edx); |
| 513 | } |
| 514 | } |
| 515 | if (!HasArgsInRegisters()) { |
| 516 | __ mov(right, Operand(esp, 1 * kPointerSize)); |
| 517 | __ mov(left, Operand(esp, 2 * kPointerSize)); |
| 518 | } |
| 519 | |
| 520 | if (static_operands_type_.IsSmi()) { |
| 521 | if (FLAG_debug_code) { |
| 522 | __ AbortIfNotSmi(left); |
| 523 | __ AbortIfNotSmi(right); |
| 524 | } |
| 525 | if (op_ == Token::BIT_OR) { |
| 526 | __ or_(right, Operand(left)); |
| 527 | GenerateReturn(masm); |
| 528 | return; |
| 529 | } else if (op_ == Token::BIT_AND) { |
| 530 | __ and_(right, Operand(left)); |
| 531 | GenerateReturn(masm); |
| 532 | return; |
| 533 | } else if (op_ == Token::BIT_XOR) { |
| 534 | __ xor_(right, Operand(left)); |
| 535 | GenerateReturn(masm); |
| 536 | return; |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | // 2. Prepare the smi check of both operands by oring them together. |
| 541 | Comment smi_check_comment(masm, "-- Smi check arguments"); |
| 542 | Label not_smis; |
| 543 | Register combined = ecx; |
| 544 | ASSERT(!left.is(combined) && !right.is(combined)); |
| 545 | switch (op_) { |
| 546 | case Token::BIT_OR: |
| 547 | // Perform the operation into eax and smi check the result. Preserve |
| 548 | // eax in case the result is not a smi. |
| 549 | ASSERT(!left.is(ecx) && !right.is(ecx)); |
| 550 | __ mov(ecx, right); |
| 551 | __ or_(right, Operand(left)); // Bitwise or is commutative. |
| 552 | combined = right; |
| 553 | break; |
| 554 | |
| 555 | case Token::BIT_XOR: |
| 556 | case Token::BIT_AND: |
| 557 | case Token::ADD: |
| 558 | case Token::SUB: |
| 559 | case Token::MUL: |
| 560 | case Token::DIV: |
| 561 | case Token::MOD: |
| 562 | __ mov(combined, right); |
| 563 | __ or_(combined, Operand(left)); |
| 564 | break; |
| 565 | |
| 566 | case Token::SHL: |
| 567 | case Token::SAR: |
| 568 | case Token::SHR: |
| 569 | // Move the right operand into ecx for the shift operation, use eax |
| 570 | // for the smi check register. |
| 571 | ASSERT(!left.is(ecx) && !right.is(ecx)); |
| 572 | __ mov(ecx, right); |
| 573 | __ or_(right, Operand(left)); |
| 574 | combined = right; |
| 575 | break; |
| 576 | |
| 577 | default: |
| 578 | break; |
| 579 | } |
| 580 | |
| 581 | // 3. Perform the smi check of the operands. |
| 582 | STATIC_ASSERT(kSmiTag == 0); // Adjust zero check if not the case. |
| 583 | __ test(combined, Immediate(kSmiTagMask)); |
| 584 | __ j(not_zero, ¬_smis, not_taken); |
| 585 | |
| 586 | // 4. Operands are both smis, perform the operation leaving the result in |
| 587 | // eax and check the result if necessary. |
| 588 | Comment perform_smi(masm, "-- Perform smi operation"); |
| 589 | Label use_fp_on_smis; |
| 590 | switch (op_) { |
| 591 | case Token::BIT_OR: |
| 592 | // Nothing to do. |
| 593 | break; |
| 594 | |
| 595 | case Token::BIT_XOR: |
| 596 | ASSERT(right.is(eax)); |
| 597 | __ xor_(right, Operand(left)); // Bitwise xor is commutative. |
| 598 | break; |
| 599 | |
| 600 | case Token::BIT_AND: |
| 601 | ASSERT(right.is(eax)); |
| 602 | __ and_(right, Operand(left)); // Bitwise and is commutative. |
| 603 | break; |
| 604 | |
| 605 | case Token::SHL: |
| 606 | // Remove tags from operands (but keep sign). |
| 607 | __ SmiUntag(left); |
| 608 | __ SmiUntag(ecx); |
| 609 | // Perform the operation. |
| 610 | __ shl_cl(left); |
| 611 | // Check that the *signed* result fits in a smi. |
| 612 | __ cmp(left, 0xc0000000); |
| 613 | __ j(sign, &use_fp_on_smis, not_taken); |
| 614 | // Tag the result and store it in register eax. |
| 615 | __ SmiTag(left); |
| 616 | __ mov(eax, left); |
| 617 | break; |
| 618 | |
| 619 | case Token::SAR: |
| 620 | // Remove tags from operands (but keep sign). |
| 621 | __ SmiUntag(left); |
| 622 | __ SmiUntag(ecx); |
| 623 | // Perform the operation. |
| 624 | __ sar_cl(left); |
| 625 | // Tag the result and store it in register eax. |
| 626 | __ SmiTag(left); |
| 627 | __ mov(eax, left); |
| 628 | break; |
| 629 | |
| 630 | case Token::SHR: |
| 631 | // Remove tags from operands (but keep sign). |
| 632 | __ SmiUntag(left); |
| 633 | __ SmiUntag(ecx); |
| 634 | // Perform the operation. |
| 635 | __ shr_cl(left); |
| 636 | // Check that the *unsigned* result fits in a smi. |
| 637 | // Neither of the two high-order bits can be set: |
| 638 | // - 0x80000000: high bit would be lost when smi tagging. |
| 639 | // - 0x40000000: this number would convert to negative when |
| 640 | // Smi tagging these two cases can only happen with shifts |
| 641 | // by 0 or 1 when handed a valid smi. |
| 642 | __ test(left, Immediate(0xc0000000)); |
| 643 | __ j(not_zero, slow, not_taken); |
| 644 | // Tag the result and store it in register eax. |
| 645 | __ SmiTag(left); |
| 646 | __ mov(eax, left); |
| 647 | break; |
| 648 | |
| 649 | case Token::ADD: |
| 650 | ASSERT(right.is(eax)); |
| 651 | __ add(right, Operand(left)); // Addition is commutative. |
| 652 | __ j(overflow, &use_fp_on_smis, not_taken); |
| 653 | break; |
| 654 | |
| 655 | case Token::SUB: |
| 656 | __ sub(left, Operand(right)); |
| 657 | __ j(overflow, &use_fp_on_smis, not_taken); |
| 658 | __ mov(eax, left); |
| 659 | break; |
| 660 | |
| 661 | case Token::MUL: |
| 662 | // If the smi tag is 0 we can just leave the tag on one operand. |
| 663 | STATIC_ASSERT(kSmiTag == 0); // Adjust code below if not the case. |
| 664 | // We can't revert the multiplication if the result is not a smi |
| 665 | // so save the right operand. |
| 666 | __ mov(ebx, right); |
| 667 | // Remove tag from one of the operands (but keep sign). |
| 668 | __ SmiUntag(right); |
| 669 | // Do multiplication. |
| 670 | __ imul(right, Operand(left)); // Multiplication is commutative. |
| 671 | __ j(overflow, &use_fp_on_smis, not_taken); |
| 672 | // Check for negative zero result. Use combined = left | right. |
| 673 | __ NegativeZeroTest(right, combined, &use_fp_on_smis); |
| 674 | break; |
| 675 | |
| 676 | case Token::DIV: |
| 677 | // We can't revert the division if the result is not a smi so |
| 678 | // save the left operand. |
| 679 | __ mov(edi, left); |
| 680 | // Check for 0 divisor. |
| 681 | __ test(right, Operand(right)); |
| 682 | __ j(zero, &use_fp_on_smis, not_taken); |
| 683 | // Sign extend left into edx:eax. |
| 684 | ASSERT(left.is(eax)); |
| 685 | __ cdq(); |
| 686 | // Divide edx:eax by right. |
| 687 | __ idiv(right); |
| 688 | // Check for the corner case of dividing the most negative smi by |
| 689 | // -1. We cannot use the overflow flag, since it is not set by idiv |
| 690 | // instruction. |
| 691 | STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| 692 | __ cmp(eax, 0x40000000); |
| 693 | __ j(equal, &use_fp_on_smis); |
| 694 | // Check for negative zero result. Use combined = left | right. |
| 695 | __ NegativeZeroTest(eax, combined, &use_fp_on_smis); |
| 696 | // Check that the remainder is zero. |
| 697 | __ test(edx, Operand(edx)); |
| 698 | __ j(not_zero, &use_fp_on_smis); |
| 699 | // Tag the result and store it in register eax. |
| 700 | __ SmiTag(eax); |
| 701 | break; |
| 702 | |
| 703 | case Token::MOD: |
| 704 | // Check for 0 divisor. |
| 705 | __ test(right, Operand(right)); |
| 706 | __ j(zero, ¬_smis, not_taken); |
| 707 | |
| 708 | // Sign extend left into edx:eax. |
| 709 | ASSERT(left.is(eax)); |
| 710 | __ cdq(); |
| 711 | // Divide edx:eax by right. |
| 712 | __ idiv(right); |
| 713 | // Check for negative zero result. Use combined = left | right. |
| 714 | __ NegativeZeroTest(edx, combined, slow); |
| 715 | // Move remainder to register eax. |
| 716 | __ mov(eax, edx); |
| 717 | break; |
| 718 | |
| 719 | default: |
| 720 | UNREACHABLE(); |
| 721 | } |
| 722 | |
| 723 | // 5. Emit return of result in eax. |
| 724 | GenerateReturn(masm); |
| 725 | |
| 726 | // 6. For some operations emit inline code to perform floating point |
| 727 | // operations on known smis (e.g., if the result of the operation |
| 728 | // overflowed the smi range). |
| 729 | switch (op_) { |
| 730 | case Token::SHL: { |
| 731 | Comment perform_float(masm, "-- Perform float operation on smis"); |
| 732 | __ bind(&use_fp_on_smis); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 733 | if (runtime_operands_type_ != BinaryOpIC::UNINIT_OR_SMI) { |
| 734 | // Result we want is in left == edx, so we can put the allocated heap |
| 735 | // number in eax. |
| 736 | __ AllocateHeapNumber(eax, ecx, ebx, slow); |
| 737 | // Store the result in the HeapNumber and return. |
| 738 | if (CpuFeatures::IsSupported(SSE2)) { |
| 739 | CpuFeatures::Scope use_sse2(SSE2); |
| 740 | __ cvtsi2sd(xmm0, Operand(left)); |
| 741 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 742 | } else { |
| 743 | // It's OK to overwrite the right argument on the stack because we |
| 744 | // are about to return. |
| 745 | __ mov(Operand(esp, 1 * kPointerSize), left); |
| 746 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 747 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 748 | } |
| 749 | GenerateReturn(masm); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 750 | } else { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 751 | ASSERT(runtime_operands_type_ == BinaryOpIC::UNINIT_OR_SMI); |
| 752 | __ jmp(slow); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 753 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 754 | break; |
| 755 | } |
| 756 | |
| 757 | case Token::ADD: |
| 758 | case Token::SUB: |
| 759 | case Token::MUL: |
| 760 | case Token::DIV: { |
| 761 | Comment perform_float(masm, "-- Perform float operation on smis"); |
| 762 | __ bind(&use_fp_on_smis); |
| 763 | // Restore arguments to edx, eax. |
| 764 | switch (op_) { |
| 765 | case Token::ADD: |
| 766 | // Revert right = right + left. |
| 767 | __ sub(right, Operand(left)); |
| 768 | break; |
| 769 | case Token::SUB: |
| 770 | // Revert left = left - right. |
| 771 | __ add(left, Operand(right)); |
| 772 | break; |
| 773 | case Token::MUL: |
| 774 | // Right was clobbered but a copy is in ebx. |
| 775 | __ mov(right, ebx); |
| 776 | break; |
| 777 | case Token::DIV: |
| 778 | // Left was clobbered but a copy is in edi. Right is in ebx for |
| 779 | // division. |
| 780 | __ mov(edx, edi); |
| 781 | __ mov(eax, right); |
| 782 | break; |
| 783 | default: UNREACHABLE(); |
| 784 | break; |
| 785 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 786 | if (runtime_operands_type_ != BinaryOpIC::UNINIT_OR_SMI) { |
| 787 | __ AllocateHeapNumber(ecx, ebx, no_reg, slow); |
| 788 | if (CpuFeatures::IsSupported(SSE2)) { |
| 789 | CpuFeatures::Scope use_sse2(SSE2); |
| 790 | FloatingPointHelper::LoadSSE2Smis(masm, ebx); |
| 791 | switch (op_) { |
| 792 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 793 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 794 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 795 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 796 | default: UNREACHABLE(); |
| 797 | } |
| 798 | __ movdbl(FieldOperand(ecx, HeapNumber::kValueOffset), xmm0); |
| 799 | } else { // SSE2 not available, use FPU. |
| 800 | FloatingPointHelper::LoadFloatSmis(masm, ebx); |
| 801 | switch (op_) { |
| 802 | case Token::ADD: __ faddp(1); break; |
| 803 | case Token::SUB: __ fsubp(1); break; |
| 804 | case Token::MUL: __ fmulp(1); break; |
| 805 | case Token::DIV: __ fdivp(1); break; |
| 806 | default: UNREACHABLE(); |
| 807 | } |
| 808 | __ fstp_d(FieldOperand(ecx, HeapNumber::kValueOffset)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 809 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 810 | __ mov(eax, ecx); |
| 811 | GenerateReturn(masm); |
| 812 | } else { |
| 813 | ASSERT(runtime_operands_type_ == BinaryOpIC::UNINIT_OR_SMI); |
| 814 | __ jmp(slow); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 815 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 816 | break; |
| 817 | } |
| 818 | |
| 819 | default: |
| 820 | break; |
| 821 | } |
| 822 | |
| 823 | // 7. Non-smi operands, fall out to the non-smi code with the operands in |
| 824 | // edx and eax. |
| 825 | Comment done_comment(masm, "-- Enter non-smi code"); |
| 826 | __ bind(¬_smis); |
| 827 | switch (op_) { |
| 828 | case Token::BIT_OR: |
| 829 | case Token::SHL: |
| 830 | case Token::SAR: |
| 831 | case Token::SHR: |
| 832 | // Right operand is saved in ecx and eax was destroyed by the smi |
| 833 | // check. |
| 834 | __ mov(eax, ecx); |
| 835 | break; |
| 836 | |
| 837 | case Token::DIV: |
| 838 | case Token::MOD: |
| 839 | // Operands are in eax, ebx at this point. |
| 840 | __ mov(edx, eax); |
| 841 | __ mov(eax, ebx); |
| 842 | break; |
| 843 | |
| 844 | default: |
| 845 | break; |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | |
| 850 | void GenericBinaryOpStub::Generate(MacroAssembler* masm) { |
| 851 | Label call_runtime; |
| 852 | |
| 853 | __ IncrementCounter(&Counters::generic_binary_stub_calls, 1); |
| 854 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 855 | if (runtime_operands_type_ == BinaryOpIC::UNINIT_OR_SMI) { |
| 856 | Label slow; |
| 857 | if (ShouldGenerateSmiCode()) GenerateSmiCode(masm, &slow); |
| 858 | __ bind(&slow); |
| 859 | GenerateTypeTransition(masm); |
| 860 | } |
| 861 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 862 | // Generate fast case smi code if requested. This flag is set when the fast |
| 863 | // case smi code is not generated by the caller. Generating it here will speed |
| 864 | // up common operations. |
| 865 | if (ShouldGenerateSmiCode()) { |
| 866 | GenerateSmiCode(masm, &call_runtime); |
| 867 | } else if (op_ != Token::MOD) { // MOD goes straight to runtime. |
| 868 | if (!HasArgsInRegisters()) { |
| 869 | GenerateLoadArguments(masm); |
| 870 | } |
| 871 | } |
| 872 | |
| 873 | // Floating point case. |
| 874 | if (ShouldGenerateFPCode()) { |
| 875 | switch (op_) { |
| 876 | case Token::ADD: |
| 877 | case Token::SUB: |
| 878 | case Token::MUL: |
| 879 | case Token::DIV: { |
| 880 | if (runtime_operands_type_ == BinaryOpIC::DEFAULT && |
| 881 | HasSmiCodeInStub()) { |
| 882 | // Execution reaches this point when the first non-smi argument occurs |
| 883 | // (and only if smi code is generated). This is the right moment to |
| 884 | // patch to HEAP_NUMBERS state. The transition is attempted only for |
| 885 | // the four basic operations. The stub stays in the DEFAULT state |
| 886 | // forever for all other operations (also if smi code is skipped). |
| 887 | GenerateTypeTransition(masm); |
| 888 | break; |
| 889 | } |
| 890 | |
| 891 | Label not_floats; |
| 892 | if (CpuFeatures::IsSupported(SSE2)) { |
| 893 | CpuFeatures::Scope use_sse2(SSE2); |
| 894 | if (static_operands_type_.IsNumber()) { |
| 895 | if (FLAG_debug_code) { |
| 896 | // Assert at runtime that inputs are only numbers. |
| 897 | __ AbortIfNotNumber(edx); |
| 898 | __ AbortIfNotNumber(eax); |
| 899 | } |
| 900 | if (static_operands_type_.IsSmi()) { |
| 901 | if (FLAG_debug_code) { |
| 902 | __ AbortIfNotSmi(edx); |
| 903 | __ AbortIfNotSmi(eax); |
| 904 | } |
| 905 | FloatingPointHelper::LoadSSE2Smis(masm, ecx); |
| 906 | } else { |
| 907 | FloatingPointHelper::LoadSSE2Operands(masm); |
| 908 | } |
| 909 | } else { |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 910 | FloatingPointHelper::LoadSSE2Operands(masm, ¬_floats); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 911 | } |
| 912 | |
| 913 | switch (op_) { |
| 914 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 915 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 916 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 917 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 918 | default: UNREACHABLE(); |
| 919 | } |
| 920 | GenerateHeapResultAllocation(masm, &call_runtime); |
| 921 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 922 | GenerateReturn(masm); |
| 923 | } else { // SSE2 not available, use FPU. |
| 924 | if (static_operands_type_.IsNumber()) { |
| 925 | if (FLAG_debug_code) { |
| 926 | // Assert at runtime that inputs are only numbers. |
| 927 | __ AbortIfNotNumber(edx); |
| 928 | __ AbortIfNotNumber(eax); |
| 929 | } |
| 930 | } else { |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 931 | FloatingPointHelper::CheckFloatOperands(masm, ¬_floats, ebx); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 932 | } |
| 933 | FloatingPointHelper::LoadFloatOperands( |
| 934 | masm, |
| 935 | ecx, |
| 936 | FloatingPointHelper::ARGS_IN_REGISTERS); |
| 937 | switch (op_) { |
| 938 | case Token::ADD: __ faddp(1); break; |
| 939 | case Token::SUB: __ fsubp(1); break; |
| 940 | case Token::MUL: __ fmulp(1); break; |
| 941 | case Token::DIV: __ fdivp(1); break; |
| 942 | default: UNREACHABLE(); |
| 943 | } |
| 944 | Label after_alloc_failure; |
| 945 | GenerateHeapResultAllocation(masm, &after_alloc_failure); |
| 946 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 947 | GenerateReturn(masm); |
| 948 | __ bind(&after_alloc_failure); |
| 949 | __ ffree(); |
| 950 | __ jmp(&call_runtime); |
| 951 | } |
| 952 | __ bind(¬_floats); |
| 953 | if (runtime_operands_type_ == BinaryOpIC::DEFAULT && |
| 954 | !HasSmiCodeInStub()) { |
| 955 | // Execution reaches this point when the first non-number argument |
| 956 | // occurs (and only if smi code is skipped from the stub, otherwise |
| 957 | // the patching has already been done earlier in this case branch). |
| 958 | // Try patching to STRINGS for ADD operation. |
| 959 | if (op_ == Token::ADD) { |
| 960 | GenerateTypeTransition(masm); |
| 961 | } |
| 962 | } |
| 963 | break; |
| 964 | } |
| 965 | case Token::MOD: { |
| 966 | // For MOD we go directly to runtime in the non-smi case. |
| 967 | break; |
| 968 | } |
| 969 | case Token::BIT_OR: |
| 970 | case Token::BIT_AND: |
| 971 | case Token::BIT_XOR: |
| 972 | case Token::SAR: |
| 973 | case Token::SHL: |
| 974 | case Token::SHR: { |
| 975 | Label non_smi_result; |
| 976 | FloatingPointHelper::LoadAsIntegers(masm, |
| 977 | static_operands_type_, |
| 978 | use_sse3_, |
| 979 | &call_runtime); |
| 980 | switch (op_) { |
| 981 | case Token::BIT_OR: __ or_(eax, Operand(ecx)); break; |
| 982 | case Token::BIT_AND: __ and_(eax, Operand(ecx)); break; |
| 983 | case Token::BIT_XOR: __ xor_(eax, Operand(ecx)); break; |
| 984 | case Token::SAR: __ sar_cl(eax); break; |
| 985 | case Token::SHL: __ shl_cl(eax); break; |
| 986 | case Token::SHR: __ shr_cl(eax); break; |
| 987 | default: UNREACHABLE(); |
| 988 | } |
| 989 | if (op_ == Token::SHR) { |
| 990 | // Check if result is non-negative and fits in a smi. |
| 991 | __ test(eax, Immediate(0xc0000000)); |
| 992 | __ j(not_zero, &call_runtime); |
| 993 | } else { |
| 994 | // Check if result fits in a smi. |
| 995 | __ cmp(eax, 0xc0000000); |
| 996 | __ j(negative, &non_smi_result); |
| 997 | } |
| 998 | // Tag smi result and return. |
| 999 | __ SmiTag(eax); |
| 1000 | GenerateReturn(masm); |
| 1001 | |
| 1002 | // All ops except SHR return a signed int32 that we load in |
| 1003 | // a HeapNumber. |
| 1004 | if (op_ != Token::SHR) { |
| 1005 | __ bind(&non_smi_result); |
| 1006 | // Allocate a heap number if needed. |
| 1007 | __ mov(ebx, Operand(eax)); // ebx: result |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 1008 | NearLabel skip_allocation; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1009 | switch (mode_) { |
| 1010 | case OVERWRITE_LEFT: |
| 1011 | case OVERWRITE_RIGHT: |
| 1012 | // If the operand was an object, we skip the |
| 1013 | // allocation of a heap number. |
| 1014 | __ mov(eax, Operand(esp, mode_ == OVERWRITE_RIGHT ? |
| 1015 | 1 * kPointerSize : 2 * kPointerSize)); |
| 1016 | __ test(eax, Immediate(kSmiTagMask)); |
| 1017 | __ j(not_zero, &skip_allocation, not_taken); |
| 1018 | // Fall through! |
| 1019 | case NO_OVERWRITE: |
| 1020 | __ AllocateHeapNumber(eax, ecx, edx, &call_runtime); |
| 1021 | __ bind(&skip_allocation); |
| 1022 | break; |
| 1023 | default: UNREACHABLE(); |
| 1024 | } |
| 1025 | // Store the result in the HeapNumber and return. |
| 1026 | if (CpuFeatures::IsSupported(SSE2)) { |
| 1027 | CpuFeatures::Scope use_sse2(SSE2); |
| 1028 | __ cvtsi2sd(xmm0, Operand(ebx)); |
| 1029 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 1030 | } else { |
| 1031 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
| 1032 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 1033 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 1034 | } |
| 1035 | GenerateReturn(masm); |
| 1036 | } |
| 1037 | break; |
| 1038 | } |
| 1039 | default: UNREACHABLE(); break; |
| 1040 | } |
| 1041 | } |
| 1042 | |
ager@chromium.org | 5b2fbee | 2010-09-08 06:38:15 +0000 | [diff] [blame] | 1043 | // If all else fails, use the runtime system to get the correct |
| 1044 | // result. If arguments was passed in registers now place them on the |
| 1045 | // stack in the correct order below the return address. |
| 1046 | |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 1047 | // Avoid hitting the string ADD code below when allocation fails in |
| 1048 | // the floating point code above. |
| 1049 | if (op_ != Token::ADD) { |
| 1050 | __ bind(&call_runtime); |
| 1051 | } |
| 1052 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1053 | if (HasArgsInRegisters()) { |
| 1054 | GenerateRegisterArgsPush(masm); |
| 1055 | } |
| 1056 | |
| 1057 | switch (op_) { |
| 1058 | case Token::ADD: { |
| 1059 | // Test for string arguments before calling runtime. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1060 | |
| 1061 | // If this stub has already generated FP-specific code then the arguments |
| 1062 | // are already in edx, eax |
| 1063 | if (!ShouldGenerateFPCode() && !HasArgsInRegisters()) { |
| 1064 | GenerateLoadArguments(masm); |
| 1065 | } |
| 1066 | |
| 1067 | // Registers containing left and right operands respectively. |
| 1068 | Register lhs, rhs; |
| 1069 | if (HasArgsReversed()) { |
| 1070 | lhs = eax; |
| 1071 | rhs = edx; |
| 1072 | } else { |
| 1073 | lhs = edx; |
| 1074 | rhs = eax; |
| 1075 | } |
| 1076 | |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 1077 | // Test if left operand is a string. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 1078 | NearLabel lhs_not_string; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1079 | __ test(lhs, Immediate(kSmiTagMask)); |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 1080 | __ j(zero, &lhs_not_string); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1081 | __ CmpObjectType(lhs, FIRST_NONSTRING_TYPE, ecx); |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 1082 | __ j(above_equal, &lhs_not_string); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1083 | |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 1084 | StringAddStub string_add_left_stub(NO_STRING_CHECK_LEFT_IN_STUB); |
| 1085 | __ TailCallStub(&string_add_left_stub); |
| 1086 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 1087 | NearLabel call_runtime_with_args; |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 1088 | // Left operand is not a string, test right. |
| 1089 | __ bind(&lhs_not_string); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1090 | __ test(rhs, Immediate(kSmiTagMask)); |
ager@chromium.org | 5b2fbee | 2010-09-08 06:38:15 +0000 | [diff] [blame] | 1091 | __ j(zero, &call_runtime_with_args); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1092 | __ CmpObjectType(rhs, FIRST_NONSTRING_TYPE, ecx); |
ager@chromium.org | 5b2fbee | 2010-09-08 06:38:15 +0000 | [diff] [blame] | 1093 | __ j(above_equal, &call_runtime_with_args); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1094 | |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 1095 | StringAddStub string_add_right_stub(NO_STRING_CHECK_RIGHT_IN_STUB); |
| 1096 | __ TailCallStub(&string_add_right_stub); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1097 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1098 | // Neither argument is a string. |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 1099 | __ bind(&call_runtime); |
| 1100 | if (HasArgsInRegisters()) { |
| 1101 | GenerateRegisterArgsPush(masm); |
| 1102 | } |
ager@chromium.org | 5b2fbee | 2010-09-08 06:38:15 +0000 | [diff] [blame] | 1103 | __ bind(&call_runtime_with_args); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 1104 | __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| 1105 | break; |
| 1106 | } |
| 1107 | case Token::SUB: |
| 1108 | __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| 1109 | break; |
| 1110 | case Token::MUL: |
| 1111 | __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
| 1112 | break; |
| 1113 | case Token::DIV: |
| 1114 | __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| 1115 | break; |
| 1116 | case Token::MOD: |
| 1117 | __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| 1118 | break; |
| 1119 | case Token::BIT_OR: |
| 1120 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| 1121 | break; |
| 1122 | case Token::BIT_AND: |
| 1123 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| 1124 | break; |
| 1125 | case Token::BIT_XOR: |
| 1126 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| 1127 | break; |
| 1128 | case Token::SAR: |
| 1129 | __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| 1130 | break; |
| 1131 | case Token::SHL: |
| 1132 | __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| 1133 | break; |
| 1134 | case Token::SHR: |
| 1135 | __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| 1136 | break; |
| 1137 | default: |
| 1138 | UNREACHABLE(); |
| 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | |
| 1143 | void GenericBinaryOpStub::GenerateHeapResultAllocation(MacroAssembler* masm, |
| 1144 | Label* alloc_failure) { |
| 1145 | Label skip_allocation; |
| 1146 | OverwriteMode mode = mode_; |
| 1147 | if (HasArgsReversed()) { |
| 1148 | if (mode == OVERWRITE_RIGHT) { |
| 1149 | mode = OVERWRITE_LEFT; |
| 1150 | } else if (mode == OVERWRITE_LEFT) { |
| 1151 | mode = OVERWRITE_RIGHT; |
| 1152 | } |
| 1153 | } |
| 1154 | switch (mode) { |
| 1155 | case OVERWRITE_LEFT: { |
| 1156 | // If the argument in edx is already an object, we skip the |
| 1157 | // allocation of a heap number. |
| 1158 | __ test(edx, Immediate(kSmiTagMask)); |
| 1159 | __ j(not_zero, &skip_allocation, not_taken); |
| 1160 | // Allocate a heap number for the result. Keep eax and edx intact |
| 1161 | // for the possible runtime call. |
| 1162 | __ AllocateHeapNumber(ebx, ecx, no_reg, alloc_failure); |
| 1163 | // Now edx can be overwritten losing one of the arguments as we are |
| 1164 | // now done and will not need it any more. |
| 1165 | __ mov(edx, Operand(ebx)); |
| 1166 | __ bind(&skip_allocation); |
| 1167 | // Use object in edx as a result holder |
| 1168 | __ mov(eax, Operand(edx)); |
| 1169 | break; |
| 1170 | } |
| 1171 | case OVERWRITE_RIGHT: |
| 1172 | // If the argument in eax is already an object, we skip the |
| 1173 | // allocation of a heap number. |
| 1174 | __ test(eax, Immediate(kSmiTagMask)); |
| 1175 | __ j(not_zero, &skip_allocation, not_taken); |
| 1176 | // Fall through! |
| 1177 | case NO_OVERWRITE: |
| 1178 | // Allocate a heap number for the result. Keep eax and edx intact |
| 1179 | // for the possible runtime call. |
| 1180 | __ AllocateHeapNumber(ebx, ecx, no_reg, alloc_failure); |
| 1181 | // Now eax can be overwritten losing one of the arguments as we are |
| 1182 | // now done and will not need it any more. |
| 1183 | __ mov(eax, ebx); |
| 1184 | __ bind(&skip_allocation); |
| 1185 | break; |
| 1186 | default: UNREACHABLE(); |
| 1187 | } |
| 1188 | } |
| 1189 | |
| 1190 | |
| 1191 | void GenericBinaryOpStub::GenerateLoadArguments(MacroAssembler* masm) { |
| 1192 | // If arguments are not passed in registers read them from the stack. |
| 1193 | ASSERT(!HasArgsInRegisters()); |
| 1194 | __ mov(eax, Operand(esp, 1 * kPointerSize)); |
| 1195 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 1196 | } |
| 1197 | |
| 1198 | |
| 1199 | void GenericBinaryOpStub::GenerateReturn(MacroAssembler* masm) { |
| 1200 | // If arguments are not passed in registers remove them from the stack before |
| 1201 | // returning. |
| 1202 | if (!HasArgsInRegisters()) { |
| 1203 | __ ret(2 * kPointerSize); // Remove both operands |
| 1204 | } else { |
| 1205 | __ ret(0); |
| 1206 | } |
| 1207 | } |
| 1208 | |
| 1209 | |
| 1210 | void GenericBinaryOpStub::GenerateRegisterArgsPush(MacroAssembler* masm) { |
| 1211 | ASSERT(HasArgsInRegisters()); |
| 1212 | __ pop(ecx); |
| 1213 | if (HasArgsReversed()) { |
| 1214 | __ push(eax); |
| 1215 | __ push(edx); |
| 1216 | } else { |
| 1217 | __ push(edx); |
| 1218 | __ push(eax); |
| 1219 | } |
| 1220 | __ push(ecx); |
| 1221 | } |
| 1222 | |
| 1223 | |
| 1224 | void GenericBinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) { |
| 1225 | // Ensure the operands are on the stack. |
| 1226 | if (HasArgsInRegisters()) { |
| 1227 | GenerateRegisterArgsPush(masm); |
| 1228 | } |
| 1229 | |
| 1230 | __ pop(ecx); // Save return address. |
| 1231 | |
| 1232 | // Left and right arguments are now on top. |
| 1233 | // Push this stub's key. Although the operation and the type info are |
| 1234 | // encoded into the key, the encoding is opaque, so push them too. |
| 1235 | __ push(Immediate(Smi::FromInt(MinorKey()))); |
| 1236 | __ push(Immediate(Smi::FromInt(op_))); |
| 1237 | __ push(Immediate(Smi::FromInt(runtime_operands_type_))); |
| 1238 | |
| 1239 | __ push(ecx); // Push return address. |
| 1240 | |
| 1241 | // Patch the caller to an appropriate specialized stub and return the |
| 1242 | // operation result to the caller of the stub. |
| 1243 | __ TailCallExternalReference( |
| 1244 | ExternalReference(IC_Utility(IC::kBinaryOp_Patch)), |
| 1245 | 5, |
| 1246 | 1); |
| 1247 | } |
| 1248 | |
| 1249 | |
| 1250 | Handle<Code> GetBinaryOpStub(int key, BinaryOpIC::TypeInfo type_info) { |
| 1251 | GenericBinaryOpStub stub(key, type_info); |
| 1252 | return stub.GetCode(); |
| 1253 | } |
| 1254 | |
| 1255 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1256 | Handle<Code> GetTypeRecordingBinaryOpStub(int key, |
| 1257 | TRBinaryOpIC::TypeInfo type_info, |
| 1258 | TRBinaryOpIC::TypeInfo result_type_info) { |
| 1259 | TypeRecordingBinaryOpStub stub(key, type_info, result_type_info); |
| 1260 | return stub.GetCode(); |
| 1261 | } |
| 1262 | |
| 1263 | |
| 1264 | void TypeRecordingBinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) { |
| 1265 | __ pop(ecx); // Save return address. |
| 1266 | __ push(edx); |
| 1267 | __ push(eax); |
| 1268 | // Left and right arguments are now on top. |
| 1269 | // Push this stub's key. Although the operation and the type info are |
| 1270 | // encoded into the key, the encoding is opaque, so push them too. |
| 1271 | __ push(Immediate(Smi::FromInt(MinorKey()))); |
| 1272 | __ push(Immediate(Smi::FromInt(op_))); |
| 1273 | __ push(Immediate(Smi::FromInt(operands_type_))); |
| 1274 | |
| 1275 | __ push(ecx); // Push return address. |
| 1276 | |
| 1277 | // Patch the caller to an appropriate specialized stub and return the |
| 1278 | // operation result to the caller of the stub. |
| 1279 | __ TailCallExternalReference( |
| 1280 | ExternalReference(IC_Utility(IC::kTypeRecordingBinaryOp_Patch)), |
| 1281 | 5, |
| 1282 | 1); |
| 1283 | } |
| 1284 | |
| 1285 | |
| 1286 | // Prepare for a type transition runtime call when the args are already on |
| 1287 | // the stack, under the return address. |
| 1288 | void TypeRecordingBinaryOpStub::GenerateTypeTransitionWithSavedArgs( |
| 1289 | MacroAssembler* masm) { |
| 1290 | __ pop(ecx); // Save return address. |
| 1291 | // Left and right arguments are already on top of the stack. |
| 1292 | // Push this stub's key. Although the operation and the type info are |
| 1293 | // encoded into the key, the encoding is opaque, so push them too. |
| 1294 | __ push(Immediate(Smi::FromInt(MinorKey()))); |
| 1295 | __ push(Immediate(Smi::FromInt(op_))); |
| 1296 | __ push(Immediate(Smi::FromInt(operands_type_))); |
| 1297 | |
| 1298 | __ push(ecx); // Push return address. |
| 1299 | |
| 1300 | // Patch the caller to an appropriate specialized stub and return the |
| 1301 | // operation result to the caller of the stub. |
| 1302 | __ TailCallExternalReference( |
| 1303 | ExternalReference(IC_Utility(IC::kTypeRecordingBinaryOp_Patch)), |
| 1304 | 5, |
| 1305 | 1); |
| 1306 | } |
| 1307 | |
| 1308 | |
| 1309 | void TypeRecordingBinaryOpStub::Generate(MacroAssembler* masm) { |
| 1310 | switch (operands_type_) { |
| 1311 | case TRBinaryOpIC::UNINITIALIZED: |
| 1312 | GenerateTypeTransition(masm); |
| 1313 | break; |
| 1314 | case TRBinaryOpIC::SMI: |
| 1315 | GenerateSmiStub(masm); |
| 1316 | break; |
| 1317 | case TRBinaryOpIC::INT32: |
| 1318 | GenerateInt32Stub(masm); |
| 1319 | break; |
| 1320 | case TRBinaryOpIC::HEAP_NUMBER: |
| 1321 | GenerateHeapNumberStub(masm); |
| 1322 | break; |
| 1323 | case TRBinaryOpIC::STRING: |
| 1324 | GenerateStringStub(masm); |
| 1325 | break; |
| 1326 | case TRBinaryOpIC::GENERIC: |
| 1327 | GenerateGeneric(masm); |
| 1328 | break; |
| 1329 | default: |
| 1330 | UNREACHABLE(); |
| 1331 | } |
| 1332 | } |
| 1333 | |
| 1334 | |
| 1335 | const char* TypeRecordingBinaryOpStub::GetName() { |
| 1336 | if (name_ != NULL) return name_; |
| 1337 | const int kMaxNameLength = 100; |
| 1338 | name_ = Bootstrapper::AllocateAutoDeletedArray(kMaxNameLength); |
| 1339 | if (name_ == NULL) return "OOM"; |
| 1340 | const char* op_name = Token::Name(op_); |
| 1341 | const char* overwrite_name; |
| 1342 | switch (mode_) { |
| 1343 | case NO_OVERWRITE: overwrite_name = "Alloc"; break; |
| 1344 | case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break; |
| 1345 | case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break; |
| 1346 | default: overwrite_name = "UnknownOverwrite"; break; |
| 1347 | } |
| 1348 | |
| 1349 | OS::SNPrintF(Vector<char>(name_, kMaxNameLength), |
| 1350 | "TypeRecordingBinaryOpStub_%s_%s_%s", |
| 1351 | op_name, |
| 1352 | overwrite_name, |
| 1353 | TRBinaryOpIC::GetName(operands_type_)); |
| 1354 | return name_; |
| 1355 | } |
| 1356 | |
| 1357 | |
| 1358 | void TypeRecordingBinaryOpStub::GenerateSmiCode(MacroAssembler* masm, |
| 1359 | Label* slow, |
| 1360 | SmiCodeGenerateHeapNumberResults allow_heapnumber_results) { |
| 1361 | // 1. Move arguments into edx, eax except for DIV and MOD, which need the |
| 1362 | // dividend in eax and edx free for the division. Use eax, ebx for those. |
| 1363 | Comment load_comment(masm, "-- Load arguments"); |
| 1364 | Register left = edx; |
| 1365 | Register right = eax; |
| 1366 | if (op_ == Token::DIV || op_ == Token::MOD) { |
| 1367 | left = eax; |
| 1368 | right = ebx; |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 1369 | __ mov(ebx, eax); |
| 1370 | __ mov(eax, edx); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1371 | } |
| 1372 | |
| 1373 | |
| 1374 | // 2. Prepare the smi check of both operands by oring them together. |
| 1375 | Comment smi_check_comment(masm, "-- Smi check arguments"); |
| 1376 | Label not_smis; |
| 1377 | Register combined = ecx; |
| 1378 | ASSERT(!left.is(combined) && !right.is(combined)); |
| 1379 | switch (op_) { |
| 1380 | case Token::BIT_OR: |
| 1381 | // Perform the operation into eax and smi check the result. Preserve |
| 1382 | // eax in case the result is not a smi. |
| 1383 | ASSERT(!left.is(ecx) && !right.is(ecx)); |
| 1384 | __ mov(ecx, right); |
| 1385 | __ or_(right, Operand(left)); // Bitwise or is commutative. |
| 1386 | combined = right; |
| 1387 | break; |
| 1388 | |
| 1389 | case Token::BIT_XOR: |
| 1390 | case Token::BIT_AND: |
| 1391 | case Token::ADD: |
| 1392 | case Token::SUB: |
| 1393 | case Token::MUL: |
| 1394 | case Token::DIV: |
| 1395 | case Token::MOD: |
| 1396 | __ mov(combined, right); |
| 1397 | __ or_(combined, Operand(left)); |
| 1398 | break; |
| 1399 | |
| 1400 | case Token::SHL: |
| 1401 | case Token::SAR: |
| 1402 | case Token::SHR: |
| 1403 | // Move the right operand into ecx for the shift operation, use eax |
| 1404 | // for the smi check register. |
| 1405 | ASSERT(!left.is(ecx) && !right.is(ecx)); |
| 1406 | __ mov(ecx, right); |
| 1407 | __ or_(right, Operand(left)); |
| 1408 | combined = right; |
| 1409 | break; |
| 1410 | |
| 1411 | default: |
| 1412 | break; |
| 1413 | } |
| 1414 | |
| 1415 | // 3. Perform the smi check of the operands. |
| 1416 | STATIC_ASSERT(kSmiTag == 0); // Adjust zero check if not the case. |
| 1417 | __ test(combined, Immediate(kSmiTagMask)); |
| 1418 | __ j(not_zero, ¬_smis, not_taken); |
| 1419 | |
| 1420 | // 4. Operands are both smis, perform the operation leaving the result in |
| 1421 | // eax and check the result if necessary. |
| 1422 | Comment perform_smi(masm, "-- Perform smi operation"); |
| 1423 | Label use_fp_on_smis; |
| 1424 | switch (op_) { |
| 1425 | case Token::BIT_OR: |
| 1426 | // Nothing to do. |
| 1427 | break; |
| 1428 | |
| 1429 | case Token::BIT_XOR: |
| 1430 | ASSERT(right.is(eax)); |
| 1431 | __ xor_(right, Operand(left)); // Bitwise xor is commutative. |
| 1432 | break; |
| 1433 | |
| 1434 | case Token::BIT_AND: |
| 1435 | ASSERT(right.is(eax)); |
| 1436 | __ and_(right, Operand(left)); // Bitwise and is commutative. |
| 1437 | break; |
| 1438 | |
| 1439 | case Token::SHL: |
| 1440 | // Remove tags from operands (but keep sign). |
| 1441 | __ SmiUntag(left); |
| 1442 | __ SmiUntag(ecx); |
| 1443 | // Perform the operation. |
| 1444 | __ shl_cl(left); |
| 1445 | // Check that the *signed* result fits in a smi. |
| 1446 | __ cmp(left, 0xc0000000); |
| 1447 | __ j(sign, &use_fp_on_smis, not_taken); |
| 1448 | // Tag the result and store it in register eax. |
| 1449 | __ SmiTag(left); |
| 1450 | __ mov(eax, left); |
| 1451 | break; |
| 1452 | |
| 1453 | case Token::SAR: |
| 1454 | // Remove tags from operands (but keep sign). |
| 1455 | __ SmiUntag(left); |
| 1456 | __ SmiUntag(ecx); |
| 1457 | // Perform the operation. |
| 1458 | __ sar_cl(left); |
| 1459 | // Tag the result and store it in register eax. |
| 1460 | __ SmiTag(left); |
| 1461 | __ mov(eax, left); |
| 1462 | break; |
| 1463 | |
| 1464 | case Token::SHR: |
| 1465 | // Remove tags from operands (but keep sign). |
| 1466 | __ SmiUntag(left); |
| 1467 | __ SmiUntag(ecx); |
| 1468 | // Perform the operation. |
| 1469 | __ shr_cl(left); |
| 1470 | // Check that the *unsigned* result fits in a smi. |
| 1471 | // Neither of the two high-order bits can be set: |
| 1472 | // - 0x80000000: high bit would be lost when smi tagging. |
| 1473 | // - 0x40000000: this number would convert to negative when |
| 1474 | // Smi tagging these two cases can only happen with shifts |
| 1475 | // by 0 or 1 when handed a valid smi. |
| 1476 | __ test(left, Immediate(0xc0000000)); |
| 1477 | __ j(not_zero, slow, not_taken); |
| 1478 | // Tag the result and store it in register eax. |
| 1479 | __ SmiTag(left); |
| 1480 | __ mov(eax, left); |
| 1481 | break; |
| 1482 | |
| 1483 | case Token::ADD: |
| 1484 | ASSERT(right.is(eax)); |
| 1485 | __ add(right, Operand(left)); // Addition is commutative. |
| 1486 | __ j(overflow, &use_fp_on_smis, not_taken); |
| 1487 | break; |
| 1488 | |
| 1489 | case Token::SUB: |
| 1490 | __ sub(left, Operand(right)); |
| 1491 | __ j(overflow, &use_fp_on_smis, not_taken); |
| 1492 | __ mov(eax, left); |
| 1493 | break; |
| 1494 | |
| 1495 | case Token::MUL: |
| 1496 | // If the smi tag is 0 we can just leave the tag on one operand. |
| 1497 | STATIC_ASSERT(kSmiTag == 0); // Adjust code below if not the case. |
| 1498 | // We can't revert the multiplication if the result is not a smi |
| 1499 | // so save the right operand. |
| 1500 | __ mov(ebx, right); |
| 1501 | // Remove tag from one of the operands (but keep sign). |
| 1502 | __ SmiUntag(right); |
| 1503 | // Do multiplication. |
| 1504 | __ imul(right, Operand(left)); // Multiplication is commutative. |
| 1505 | __ j(overflow, &use_fp_on_smis, not_taken); |
| 1506 | // Check for negative zero result. Use combined = left | right. |
| 1507 | __ NegativeZeroTest(right, combined, &use_fp_on_smis); |
| 1508 | break; |
| 1509 | |
| 1510 | case Token::DIV: |
| 1511 | // We can't revert the division if the result is not a smi so |
| 1512 | // save the left operand. |
| 1513 | __ mov(edi, left); |
| 1514 | // Check for 0 divisor. |
| 1515 | __ test(right, Operand(right)); |
| 1516 | __ j(zero, &use_fp_on_smis, not_taken); |
| 1517 | // Sign extend left into edx:eax. |
| 1518 | ASSERT(left.is(eax)); |
| 1519 | __ cdq(); |
| 1520 | // Divide edx:eax by right. |
| 1521 | __ idiv(right); |
| 1522 | // Check for the corner case of dividing the most negative smi by |
| 1523 | // -1. We cannot use the overflow flag, since it is not set by idiv |
| 1524 | // instruction. |
| 1525 | STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| 1526 | __ cmp(eax, 0x40000000); |
| 1527 | __ j(equal, &use_fp_on_smis); |
| 1528 | // Check for negative zero result. Use combined = left | right. |
| 1529 | __ NegativeZeroTest(eax, combined, &use_fp_on_smis); |
| 1530 | // Check that the remainder is zero. |
| 1531 | __ test(edx, Operand(edx)); |
| 1532 | __ j(not_zero, &use_fp_on_smis); |
| 1533 | // Tag the result and store it in register eax. |
| 1534 | __ SmiTag(eax); |
| 1535 | break; |
| 1536 | |
| 1537 | case Token::MOD: |
| 1538 | // Check for 0 divisor. |
| 1539 | __ test(right, Operand(right)); |
| 1540 | __ j(zero, ¬_smis, not_taken); |
| 1541 | |
| 1542 | // Sign extend left into edx:eax. |
| 1543 | ASSERT(left.is(eax)); |
| 1544 | __ cdq(); |
| 1545 | // Divide edx:eax by right. |
| 1546 | __ idiv(right); |
| 1547 | // Check for negative zero result. Use combined = left | right. |
| 1548 | __ NegativeZeroTest(edx, combined, slow); |
| 1549 | // Move remainder to register eax. |
| 1550 | __ mov(eax, edx); |
| 1551 | break; |
| 1552 | |
| 1553 | default: |
| 1554 | UNREACHABLE(); |
| 1555 | } |
| 1556 | |
| 1557 | // 5. Emit return of result in eax. Some operations have registers pushed. |
| 1558 | switch (op_) { |
| 1559 | case Token::ADD: |
| 1560 | case Token::SUB: |
| 1561 | case Token::MUL: |
| 1562 | case Token::DIV: |
| 1563 | __ ret(0); |
| 1564 | break; |
| 1565 | case Token::MOD: |
| 1566 | case Token::BIT_OR: |
| 1567 | case Token::BIT_AND: |
| 1568 | case Token::BIT_XOR: |
| 1569 | case Token::SAR: |
| 1570 | case Token::SHL: |
| 1571 | case Token::SHR: |
| 1572 | __ ret(2 * kPointerSize); |
| 1573 | break; |
| 1574 | default: |
| 1575 | UNREACHABLE(); |
| 1576 | } |
| 1577 | |
| 1578 | // 6. For some operations emit inline code to perform floating point |
| 1579 | // operations on known smis (e.g., if the result of the operation |
| 1580 | // overflowed the smi range). |
| 1581 | if (allow_heapnumber_results == NO_HEAPNUMBER_RESULTS) { |
| 1582 | __ bind(&use_fp_on_smis); |
| 1583 | switch (op_) { |
| 1584 | // Undo the effects of some operations, and some register moves. |
| 1585 | case Token::SHL: |
| 1586 | // The arguments are saved on the stack, and only used from there. |
| 1587 | break; |
| 1588 | case Token::ADD: |
| 1589 | // Revert right = right + left. |
| 1590 | __ sub(right, Operand(left)); |
| 1591 | break; |
| 1592 | case Token::SUB: |
| 1593 | // Revert left = left - right. |
| 1594 | __ add(left, Operand(right)); |
| 1595 | break; |
| 1596 | case Token::MUL: |
| 1597 | // Right was clobbered but a copy is in ebx. |
| 1598 | __ mov(right, ebx); |
| 1599 | break; |
| 1600 | case Token::DIV: |
| 1601 | // Left was clobbered but a copy is in edi. Right is in ebx for |
| 1602 | // division. They should be in eax, ebx for jump to not_smi. |
| 1603 | __ mov(eax, edi); |
| 1604 | break; |
| 1605 | default: |
| 1606 | // No other operators jump to use_fp_on_smis. |
| 1607 | break; |
| 1608 | } |
| 1609 | __ jmp(¬_smis); |
| 1610 | } else { |
| 1611 | ASSERT(allow_heapnumber_results == ALLOW_HEAPNUMBER_RESULTS); |
| 1612 | switch (op_) { |
| 1613 | case Token::SHL: { |
| 1614 | Comment perform_float(masm, "-- Perform float operation on smis"); |
| 1615 | __ bind(&use_fp_on_smis); |
| 1616 | // Result we want is in left == edx, so we can put the allocated heap |
| 1617 | // number in eax. |
| 1618 | __ AllocateHeapNumber(eax, ecx, ebx, slow); |
| 1619 | // Store the result in the HeapNumber and return. |
| 1620 | if (CpuFeatures::IsSupported(SSE2)) { |
| 1621 | CpuFeatures::Scope use_sse2(SSE2); |
| 1622 | __ cvtsi2sd(xmm0, Operand(left)); |
| 1623 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 1624 | } else { |
| 1625 | // It's OK to overwrite the right argument on the stack because we |
| 1626 | // are about to return. |
| 1627 | __ mov(Operand(esp, 1 * kPointerSize), left); |
| 1628 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 1629 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 1630 | } |
| 1631 | __ ret(2 * kPointerSize); |
| 1632 | break; |
| 1633 | } |
| 1634 | |
| 1635 | case Token::ADD: |
| 1636 | case Token::SUB: |
| 1637 | case Token::MUL: |
| 1638 | case Token::DIV: { |
| 1639 | Comment perform_float(masm, "-- Perform float operation on smis"); |
| 1640 | __ bind(&use_fp_on_smis); |
| 1641 | // Restore arguments to edx, eax. |
| 1642 | switch (op_) { |
| 1643 | case Token::ADD: |
| 1644 | // Revert right = right + left. |
| 1645 | __ sub(right, Operand(left)); |
| 1646 | break; |
| 1647 | case Token::SUB: |
| 1648 | // Revert left = left - right. |
| 1649 | __ add(left, Operand(right)); |
| 1650 | break; |
| 1651 | case Token::MUL: |
| 1652 | // Right was clobbered but a copy is in ebx. |
| 1653 | __ mov(right, ebx); |
| 1654 | break; |
| 1655 | case Token::DIV: |
| 1656 | // Left was clobbered but a copy is in edi. Right is in ebx for |
| 1657 | // division. |
| 1658 | __ mov(edx, edi); |
| 1659 | __ mov(eax, right); |
| 1660 | break; |
| 1661 | default: UNREACHABLE(); |
| 1662 | break; |
| 1663 | } |
| 1664 | __ AllocateHeapNumber(ecx, ebx, no_reg, slow); |
| 1665 | if (CpuFeatures::IsSupported(SSE2)) { |
| 1666 | CpuFeatures::Scope use_sse2(SSE2); |
| 1667 | FloatingPointHelper::LoadSSE2Smis(masm, ebx); |
| 1668 | switch (op_) { |
| 1669 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 1670 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 1671 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 1672 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 1673 | default: UNREACHABLE(); |
| 1674 | } |
| 1675 | __ movdbl(FieldOperand(ecx, HeapNumber::kValueOffset), xmm0); |
| 1676 | } else { // SSE2 not available, use FPU. |
| 1677 | FloatingPointHelper::LoadFloatSmis(masm, ebx); |
| 1678 | switch (op_) { |
| 1679 | case Token::ADD: __ faddp(1); break; |
| 1680 | case Token::SUB: __ fsubp(1); break; |
| 1681 | case Token::MUL: __ fmulp(1); break; |
| 1682 | case Token::DIV: __ fdivp(1); break; |
| 1683 | default: UNREACHABLE(); |
| 1684 | } |
| 1685 | __ fstp_d(FieldOperand(ecx, HeapNumber::kValueOffset)); |
| 1686 | } |
| 1687 | __ mov(eax, ecx); |
| 1688 | __ ret(0); |
| 1689 | break; |
| 1690 | } |
| 1691 | |
| 1692 | default: |
| 1693 | break; |
| 1694 | } |
| 1695 | } |
| 1696 | |
| 1697 | // 7. Non-smi operands, fall out to the non-smi code with the operands in |
| 1698 | // edx and eax. |
| 1699 | Comment done_comment(masm, "-- Enter non-smi code"); |
| 1700 | __ bind(¬_smis); |
| 1701 | switch (op_) { |
| 1702 | case Token::BIT_OR: |
| 1703 | case Token::SHL: |
| 1704 | case Token::SAR: |
| 1705 | case Token::SHR: |
| 1706 | // Right operand is saved in ecx and eax was destroyed by the smi |
| 1707 | // check. |
| 1708 | __ mov(eax, ecx); |
| 1709 | break; |
| 1710 | |
| 1711 | case Token::DIV: |
| 1712 | case Token::MOD: |
| 1713 | // Operands are in eax, ebx at this point. |
| 1714 | __ mov(edx, eax); |
| 1715 | __ mov(eax, ebx); |
| 1716 | break; |
| 1717 | |
| 1718 | default: |
| 1719 | break; |
| 1720 | } |
| 1721 | } |
| 1722 | |
| 1723 | |
| 1724 | void TypeRecordingBinaryOpStub::GenerateSmiStub(MacroAssembler* masm) { |
| 1725 | Label call_runtime; |
| 1726 | |
| 1727 | switch (op_) { |
| 1728 | case Token::ADD: |
| 1729 | case Token::SUB: |
| 1730 | case Token::MUL: |
| 1731 | case Token::DIV: |
| 1732 | break; |
| 1733 | case Token::MOD: |
| 1734 | case Token::BIT_OR: |
| 1735 | case Token::BIT_AND: |
| 1736 | case Token::BIT_XOR: |
| 1737 | case Token::SAR: |
| 1738 | case Token::SHL: |
| 1739 | case Token::SHR: |
| 1740 | GenerateRegisterArgsPush(masm); |
| 1741 | break; |
| 1742 | default: |
| 1743 | UNREACHABLE(); |
| 1744 | } |
| 1745 | |
| 1746 | if (result_type_ == TRBinaryOpIC::UNINITIALIZED || |
| 1747 | result_type_ == TRBinaryOpIC::SMI) { |
| 1748 | GenerateSmiCode(masm, &call_runtime, NO_HEAPNUMBER_RESULTS); |
| 1749 | } else { |
| 1750 | GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS); |
| 1751 | } |
| 1752 | __ bind(&call_runtime); |
| 1753 | switch (op_) { |
| 1754 | case Token::ADD: |
| 1755 | case Token::SUB: |
| 1756 | case Token::MUL: |
| 1757 | case Token::DIV: |
| 1758 | GenerateTypeTransition(masm); |
| 1759 | break; |
| 1760 | case Token::MOD: |
| 1761 | case Token::BIT_OR: |
| 1762 | case Token::BIT_AND: |
| 1763 | case Token::BIT_XOR: |
| 1764 | case Token::SAR: |
| 1765 | case Token::SHL: |
| 1766 | case Token::SHR: |
| 1767 | GenerateTypeTransitionWithSavedArgs(masm); |
| 1768 | break; |
| 1769 | default: |
| 1770 | UNREACHABLE(); |
| 1771 | } |
| 1772 | } |
| 1773 | |
| 1774 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1775 | void TypeRecordingBinaryOpStub::GenerateStringStub(MacroAssembler* masm) { |
| 1776 | Label call_runtime; |
| 1777 | ASSERT(operands_type_ == TRBinaryOpIC::STRING); |
| 1778 | ASSERT(op_ == Token::ADD); |
| 1779 | // If one of the arguments is a string, call the string add stub. |
| 1780 | // Otherwise, transition to the generic TRBinaryOpIC type. |
| 1781 | |
| 1782 | // Registers containing left and right operands respectively. |
| 1783 | Register left = edx; |
| 1784 | Register right = eax; |
| 1785 | |
| 1786 | // Test if left operand is a string. |
| 1787 | NearLabel left_not_string; |
| 1788 | __ test(left, Immediate(kSmiTagMask)); |
| 1789 | __ j(zero, &left_not_string); |
| 1790 | __ CmpObjectType(left, FIRST_NONSTRING_TYPE, ecx); |
| 1791 | __ j(above_equal, &left_not_string); |
| 1792 | |
| 1793 | StringAddStub string_add_left_stub(NO_STRING_CHECK_LEFT_IN_STUB); |
| 1794 | GenerateRegisterArgsPush(masm); |
| 1795 | __ TailCallStub(&string_add_left_stub); |
| 1796 | |
| 1797 | // Left operand is not a string, test right. |
| 1798 | __ bind(&left_not_string); |
| 1799 | __ test(right, Immediate(kSmiTagMask)); |
| 1800 | __ j(zero, &call_runtime); |
| 1801 | __ CmpObjectType(right, FIRST_NONSTRING_TYPE, ecx); |
| 1802 | __ j(above_equal, &call_runtime); |
| 1803 | |
| 1804 | StringAddStub string_add_right_stub(NO_STRING_CHECK_RIGHT_IN_STUB); |
| 1805 | GenerateRegisterArgsPush(masm); |
| 1806 | __ TailCallStub(&string_add_right_stub); |
| 1807 | |
| 1808 | // Neither argument is a string. |
| 1809 | __ bind(&call_runtime); |
| 1810 | GenerateTypeTransition(masm); |
| 1811 | } |
| 1812 | |
| 1813 | |
| 1814 | void TypeRecordingBinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) { |
| 1815 | Label call_runtime; |
| 1816 | ASSERT(operands_type_ == TRBinaryOpIC::INT32); |
| 1817 | |
| 1818 | // Floating point case. |
| 1819 | switch (op_) { |
| 1820 | case Token::ADD: |
| 1821 | case Token::SUB: |
| 1822 | case Token::MUL: |
| 1823 | case Token::DIV: { |
| 1824 | Label not_floats; |
| 1825 | Label not_int32; |
| 1826 | if (CpuFeatures::IsSupported(SSE2)) { |
| 1827 | CpuFeatures::Scope use_sse2(SSE2); |
| 1828 | FloatingPointHelper::LoadSSE2Operands(masm, ¬_floats); |
| 1829 | FloatingPointHelper::CheckSSE2OperandsAreInt32(masm, ¬_int32, ecx); |
| 1830 | switch (op_) { |
| 1831 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 1832 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 1833 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 1834 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 1835 | default: UNREACHABLE(); |
| 1836 | } |
| 1837 | // Check result type if it is currently Int32. |
| 1838 | if (result_type_ <= TRBinaryOpIC::INT32) { |
| 1839 | __ cvttsd2si(ecx, Operand(xmm0)); |
| 1840 | __ cvtsi2sd(xmm2, Operand(ecx)); |
| 1841 | __ ucomisd(xmm0, xmm2); |
| 1842 | __ j(not_zero, ¬_int32); |
| 1843 | __ j(carry, ¬_int32); |
| 1844 | } |
| 1845 | GenerateHeapResultAllocation(masm, &call_runtime); |
| 1846 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 1847 | __ ret(0); |
| 1848 | } else { // SSE2 not available, use FPU. |
| 1849 | FloatingPointHelper::CheckFloatOperands(masm, ¬_floats, ebx); |
| 1850 | FloatingPointHelper::LoadFloatOperands( |
| 1851 | masm, |
| 1852 | ecx, |
| 1853 | FloatingPointHelper::ARGS_IN_REGISTERS); |
| 1854 | FloatingPointHelper::CheckFloatOperandsAreInt32(masm, ¬_int32); |
| 1855 | switch (op_) { |
| 1856 | case Token::ADD: __ faddp(1); break; |
| 1857 | case Token::SUB: __ fsubp(1); break; |
| 1858 | case Token::MUL: __ fmulp(1); break; |
| 1859 | case Token::DIV: __ fdivp(1); break; |
| 1860 | default: UNREACHABLE(); |
| 1861 | } |
| 1862 | Label after_alloc_failure; |
| 1863 | GenerateHeapResultAllocation(masm, &after_alloc_failure); |
| 1864 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 1865 | __ ret(0); |
| 1866 | __ bind(&after_alloc_failure); |
| 1867 | __ ffree(); |
| 1868 | __ jmp(&call_runtime); |
| 1869 | } |
| 1870 | |
| 1871 | __ bind(¬_floats); |
| 1872 | __ bind(¬_int32); |
| 1873 | GenerateTypeTransition(masm); |
| 1874 | break; |
| 1875 | } |
| 1876 | |
| 1877 | case Token::MOD: { |
| 1878 | // For MOD we go directly to runtime in the non-smi case. |
| 1879 | break; |
| 1880 | } |
| 1881 | case Token::BIT_OR: |
| 1882 | case Token::BIT_AND: |
| 1883 | case Token::BIT_XOR: |
| 1884 | case Token::SAR: |
| 1885 | case Token::SHL: |
| 1886 | case Token::SHR: { |
| 1887 | GenerateRegisterArgsPush(masm); |
| 1888 | Label not_floats; |
| 1889 | Label not_int32; |
| 1890 | Label non_smi_result; |
| 1891 | /* { |
| 1892 | CpuFeatures::Scope use_sse2(SSE2); |
| 1893 | FloatingPointHelper::LoadSSE2Operands(masm, ¬_floats); |
| 1894 | FloatingPointHelper::CheckSSE2OperandsAreInt32(masm, ¬_int32, ecx); |
| 1895 | }*/ |
| 1896 | FloatingPointHelper::LoadUnknownsAsIntegers(masm, |
| 1897 | use_sse3_, |
| 1898 | ¬_floats); |
| 1899 | FloatingPointHelper::CheckLoadedIntegersWereInt32(masm, use_sse3_, |
| 1900 | ¬_int32); |
| 1901 | switch (op_) { |
| 1902 | case Token::BIT_OR: __ or_(eax, Operand(ecx)); break; |
| 1903 | case Token::BIT_AND: __ and_(eax, Operand(ecx)); break; |
| 1904 | case Token::BIT_XOR: __ xor_(eax, Operand(ecx)); break; |
| 1905 | case Token::SAR: __ sar_cl(eax); break; |
| 1906 | case Token::SHL: __ shl_cl(eax); break; |
| 1907 | case Token::SHR: __ shr_cl(eax); break; |
| 1908 | default: UNREACHABLE(); |
| 1909 | } |
| 1910 | if (op_ == Token::SHR) { |
| 1911 | // Check if result is non-negative and fits in a smi. |
| 1912 | __ test(eax, Immediate(0xc0000000)); |
| 1913 | __ j(not_zero, &call_runtime); |
| 1914 | } else { |
| 1915 | // Check if result fits in a smi. |
| 1916 | __ cmp(eax, 0xc0000000); |
| 1917 | __ j(negative, &non_smi_result); |
| 1918 | } |
| 1919 | // Tag smi result and return. |
| 1920 | __ SmiTag(eax); |
| 1921 | __ ret(2 * kPointerSize); // Drop two pushed arguments from the stack. |
| 1922 | |
| 1923 | // All ops except SHR return a signed int32 that we load in |
| 1924 | // a HeapNumber. |
| 1925 | if (op_ != Token::SHR) { |
| 1926 | __ bind(&non_smi_result); |
| 1927 | // Allocate a heap number if needed. |
| 1928 | __ mov(ebx, Operand(eax)); // ebx: result |
| 1929 | NearLabel skip_allocation; |
| 1930 | switch (mode_) { |
| 1931 | case OVERWRITE_LEFT: |
| 1932 | case OVERWRITE_RIGHT: |
| 1933 | // If the operand was an object, we skip the |
| 1934 | // allocation of a heap number. |
| 1935 | __ mov(eax, Operand(esp, mode_ == OVERWRITE_RIGHT ? |
| 1936 | 1 * kPointerSize : 2 * kPointerSize)); |
| 1937 | __ test(eax, Immediate(kSmiTagMask)); |
| 1938 | __ j(not_zero, &skip_allocation, not_taken); |
| 1939 | // Fall through! |
| 1940 | case NO_OVERWRITE: |
| 1941 | __ AllocateHeapNumber(eax, ecx, edx, &call_runtime); |
| 1942 | __ bind(&skip_allocation); |
| 1943 | break; |
| 1944 | default: UNREACHABLE(); |
| 1945 | } |
| 1946 | // Store the result in the HeapNumber and return. |
| 1947 | if (CpuFeatures::IsSupported(SSE2)) { |
| 1948 | CpuFeatures::Scope use_sse2(SSE2); |
| 1949 | __ cvtsi2sd(xmm0, Operand(ebx)); |
| 1950 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 1951 | } else { |
| 1952 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
| 1953 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 1954 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 1955 | } |
| 1956 | __ ret(2 * kPointerSize); // Drop two pushed arguments from the stack. |
| 1957 | } |
| 1958 | |
| 1959 | __ bind(¬_floats); |
| 1960 | __ bind(¬_int32); |
| 1961 | GenerateTypeTransitionWithSavedArgs(masm); |
| 1962 | break; |
| 1963 | } |
| 1964 | default: UNREACHABLE(); break; |
| 1965 | } |
| 1966 | |
| 1967 | // If an allocation fails, or SHR or MOD hit a hard case, |
| 1968 | // use the runtime system to get the correct result. |
| 1969 | __ bind(&call_runtime); |
| 1970 | |
| 1971 | switch (op_) { |
| 1972 | case Token::ADD: |
| 1973 | GenerateRegisterArgsPush(masm); |
| 1974 | __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| 1975 | break; |
| 1976 | case Token::SUB: |
| 1977 | GenerateRegisterArgsPush(masm); |
| 1978 | __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| 1979 | break; |
| 1980 | case Token::MUL: |
| 1981 | GenerateRegisterArgsPush(masm); |
| 1982 | __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
| 1983 | break; |
| 1984 | case Token::DIV: |
| 1985 | GenerateRegisterArgsPush(masm); |
| 1986 | __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| 1987 | break; |
| 1988 | case Token::MOD: |
| 1989 | GenerateRegisterArgsPush(masm); |
| 1990 | __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| 1991 | break; |
| 1992 | case Token::BIT_OR: |
| 1993 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| 1994 | break; |
| 1995 | case Token::BIT_AND: |
| 1996 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| 1997 | break; |
| 1998 | case Token::BIT_XOR: |
| 1999 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| 2000 | break; |
| 2001 | case Token::SAR: |
| 2002 | __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| 2003 | break; |
| 2004 | case Token::SHL: |
| 2005 | __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| 2006 | break; |
| 2007 | case Token::SHR: |
| 2008 | __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| 2009 | break; |
| 2010 | default: |
| 2011 | UNREACHABLE(); |
| 2012 | } |
| 2013 | } |
| 2014 | |
| 2015 | |
| 2016 | void TypeRecordingBinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) { |
| 2017 | Label call_runtime; |
| 2018 | ASSERT(operands_type_ == TRBinaryOpIC::HEAP_NUMBER || |
| 2019 | operands_type_ == TRBinaryOpIC::INT32); |
| 2020 | |
| 2021 | // Floating point case. |
| 2022 | switch (op_) { |
| 2023 | case Token::ADD: |
| 2024 | case Token::SUB: |
| 2025 | case Token::MUL: |
| 2026 | case Token::DIV: { |
| 2027 | Label not_floats; |
| 2028 | if (CpuFeatures::IsSupported(SSE2)) { |
| 2029 | CpuFeatures::Scope use_sse2(SSE2); |
| 2030 | FloatingPointHelper::LoadSSE2Operands(masm, ¬_floats); |
| 2031 | |
| 2032 | switch (op_) { |
| 2033 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 2034 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 2035 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 2036 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 2037 | default: UNREACHABLE(); |
| 2038 | } |
| 2039 | GenerateHeapResultAllocation(masm, &call_runtime); |
| 2040 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 2041 | __ ret(0); |
| 2042 | } else { // SSE2 not available, use FPU. |
| 2043 | FloatingPointHelper::CheckFloatOperands(masm, ¬_floats, ebx); |
| 2044 | FloatingPointHelper::LoadFloatOperands( |
| 2045 | masm, |
| 2046 | ecx, |
| 2047 | FloatingPointHelper::ARGS_IN_REGISTERS); |
| 2048 | switch (op_) { |
| 2049 | case Token::ADD: __ faddp(1); break; |
| 2050 | case Token::SUB: __ fsubp(1); break; |
| 2051 | case Token::MUL: __ fmulp(1); break; |
| 2052 | case Token::DIV: __ fdivp(1); break; |
| 2053 | default: UNREACHABLE(); |
| 2054 | } |
| 2055 | Label after_alloc_failure; |
| 2056 | GenerateHeapResultAllocation(masm, &after_alloc_failure); |
| 2057 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2058 | __ ret(0); |
| 2059 | __ bind(&after_alloc_failure); |
| 2060 | __ ffree(); |
| 2061 | __ jmp(&call_runtime); |
| 2062 | } |
| 2063 | |
| 2064 | __ bind(¬_floats); |
| 2065 | GenerateTypeTransition(masm); |
| 2066 | break; |
| 2067 | } |
| 2068 | |
| 2069 | case Token::MOD: { |
| 2070 | // For MOD we go directly to runtime in the non-smi case. |
| 2071 | break; |
| 2072 | } |
| 2073 | case Token::BIT_OR: |
| 2074 | case Token::BIT_AND: |
| 2075 | case Token::BIT_XOR: |
| 2076 | case Token::SAR: |
| 2077 | case Token::SHL: |
| 2078 | case Token::SHR: { |
| 2079 | GenerateRegisterArgsPush(masm); |
| 2080 | Label not_floats; |
| 2081 | Label non_smi_result; |
| 2082 | FloatingPointHelper::LoadUnknownsAsIntegers(masm, |
| 2083 | use_sse3_, |
| 2084 | ¬_floats); |
| 2085 | switch (op_) { |
| 2086 | case Token::BIT_OR: __ or_(eax, Operand(ecx)); break; |
| 2087 | case Token::BIT_AND: __ and_(eax, Operand(ecx)); break; |
| 2088 | case Token::BIT_XOR: __ xor_(eax, Operand(ecx)); break; |
| 2089 | case Token::SAR: __ sar_cl(eax); break; |
| 2090 | case Token::SHL: __ shl_cl(eax); break; |
| 2091 | case Token::SHR: __ shr_cl(eax); break; |
| 2092 | default: UNREACHABLE(); |
| 2093 | } |
| 2094 | if (op_ == Token::SHR) { |
| 2095 | // Check if result is non-negative and fits in a smi. |
| 2096 | __ test(eax, Immediate(0xc0000000)); |
| 2097 | __ j(not_zero, &call_runtime); |
| 2098 | } else { |
| 2099 | // Check if result fits in a smi. |
| 2100 | __ cmp(eax, 0xc0000000); |
| 2101 | __ j(negative, &non_smi_result); |
| 2102 | } |
| 2103 | // Tag smi result and return. |
| 2104 | __ SmiTag(eax); |
| 2105 | __ ret(2 * kPointerSize); // Drop two pushed arguments from the stack. |
| 2106 | |
| 2107 | // All ops except SHR return a signed int32 that we load in |
| 2108 | // a HeapNumber. |
| 2109 | if (op_ != Token::SHR) { |
| 2110 | __ bind(&non_smi_result); |
| 2111 | // Allocate a heap number if needed. |
| 2112 | __ mov(ebx, Operand(eax)); // ebx: result |
| 2113 | NearLabel skip_allocation; |
| 2114 | switch (mode_) { |
| 2115 | case OVERWRITE_LEFT: |
| 2116 | case OVERWRITE_RIGHT: |
| 2117 | // If the operand was an object, we skip the |
| 2118 | // allocation of a heap number. |
| 2119 | __ mov(eax, Operand(esp, mode_ == OVERWRITE_RIGHT ? |
| 2120 | 1 * kPointerSize : 2 * kPointerSize)); |
| 2121 | __ test(eax, Immediate(kSmiTagMask)); |
| 2122 | __ j(not_zero, &skip_allocation, not_taken); |
| 2123 | // Fall through! |
| 2124 | case NO_OVERWRITE: |
| 2125 | __ AllocateHeapNumber(eax, ecx, edx, &call_runtime); |
| 2126 | __ bind(&skip_allocation); |
| 2127 | break; |
| 2128 | default: UNREACHABLE(); |
| 2129 | } |
| 2130 | // Store the result in the HeapNumber and return. |
| 2131 | if (CpuFeatures::IsSupported(SSE2)) { |
| 2132 | CpuFeatures::Scope use_sse2(SSE2); |
| 2133 | __ cvtsi2sd(xmm0, Operand(ebx)); |
| 2134 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 2135 | } else { |
| 2136 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
| 2137 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 2138 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2139 | } |
| 2140 | __ ret(2 * kPointerSize); // Drop two pushed arguments from the stack. |
| 2141 | } |
| 2142 | |
| 2143 | __ bind(¬_floats); |
| 2144 | GenerateTypeTransitionWithSavedArgs(masm); |
| 2145 | break; |
| 2146 | } |
| 2147 | default: UNREACHABLE(); break; |
| 2148 | } |
| 2149 | |
| 2150 | // If an allocation fails, or SHR or MOD hit a hard case, |
| 2151 | // use the runtime system to get the correct result. |
| 2152 | __ bind(&call_runtime); |
| 2153 | |
| 2154 | switch (op_) { |
| 2155 | case Token::ADD: |
| 2156 | GenerateRegisterArgsPush(masm); |
| 2157 | __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| 2158 | break; |
| 2159 | case Token::SUB: |
| 2160 | GenerateRegisterArgsPush(masm); |
| 2161 | __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| 2162 | break; |
| 2163 | case Token::MUL: |
| 2164 | GenerateRegisterArgsPush(masm); |
| 2165 | __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
| 2166 | break; |
| 2167 | case Token::DIV: |
| 2168 | GenerateRegisterArgsPush(masm); |
| 2169 | __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| 2170 | break; |
| 2171 | case Token::MOD: |
| 2172 | GenerateRegisterArgsPush(masm); |
| 2173 | __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| 2174 | break; |
| 2175 | case Token::BIT_OR: |
| 2176 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| 2177 | break; |
| 2178 | case Token::BIT_AND: |
| 2179 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| 2180 | break; |
| 2181 | case Token::BIT_XOR: |
| 2182 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| 2183 | break; |
| 2184 | case Token::SAR: |
| 2185 | __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| 2186 | break; |
| 2187 | case Token::SHL: |
| 2188 | __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| 2189 | break; |
| 2190 | case Token::SHR: |
| 2191 | __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| 2192 | break; |
| 2193 | default: |
| 2194 | UNREACHABLE(); |
| 2195 | } |
| 2196 | } |
| 2197 | |
| 2198 | |
| 2199 | void TypeRecordingBinaryOpStub::GenerateGeneric(MacroAssembler* masm) { |
| 2200 | Label call_runtime; |
| 2201 | |
| 2202 | __ IncrementCounter(&Counters::generic_binary_stub_calls, 1); |
| 2203 | |
| 2204 | switch (op_) { |
| 2205 | case Token::ADD: |
| 2206 | case Token::SUB: |
| 2207 | case Token::MUL: |
| 2208 | case Token::DIV: |
| 2209 | break; |
| 2210 | case Token::MOD: |
| 2211 | case Token::BIT_OR: |
| 2212 | case Token::BIT_AND: |
| 2213 | case Token::BIT_XOR: |
| 2214 | case Token::SAR: |
| 2215 | case Token::SHL: |
| 2216 | case Token::SHR: |
| 2217 | GenerateRegisterArgsPush(masm); |
| 2218 | break; |
| 2219 | default: |
| 2220 | UNREACHABLE(); |
| 2221 | } |
| 2222 | |
| 2223 | GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS); |
| 2224 | |
| 2225 | // Floating point case. |
| 2226 | switch (op_) { |
| 2227 | case Token::ADD: |
| 2228 | case Token::SUB: |
| 2229 | case Token::MUL: |
| 2230 | case Token::DIV: { |
| 2231 | Label not_floats; |
| 2232 | if (CpuFeatures::IsSupported(SSE2)) { |
| 2233 | CpuFeatures::Scope use_sse2(SSE2); |
| 2234 | FloatingPointHelper::LoadSSE2Operands(masm, ¬_floats); |
| 2235 | |
| 2236 | switch (op_) { |
| 2237 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 2238 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 2239 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 2240 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 2241 | default: UNREACHABLE(); |
| 2242 | } |
| 2243 | GenerateHeapResultAllocation(masm, &call_runtime); |
| 2244 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 2245 | __ ret(0); |
| 2246 | } else { // SSE2 not available, use FPU. |
| 2247 | FloatingPointHelper::CheckFloatOperands(masm, ¬_floats, ebx); |
| 2248 | FloatingPointHelper::LoadFloatOperands( |
| 2249 | masm, |
| 2250 | ecx, |
| 2251 | FloatingPointHelper::ARGS_IN_REGISTERS); |
| 2252 | switch (op_) { |
| 2253 | case Token::ADD: __ faddp(1); break; |
| 2254 | case Token::SUB: __ fsubp(1); break; |
| 2255 | case Token::MUL: __ fmulp(1); break; |
| 2256 | case Token::DIV: __ fdivp(1); break; |
| 2257 | default: UNREACHABLE(); |
| 2258 | } |
| 2259 | Label after_alloc_failure; |
| 2260 | GenerateHeapResultAllocation(masm, &after_alloc_failure); |
| 2261 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2262 | __ ret(0); |
| 2263 | __ bind(&after_alloc_failure); |
| 2264 | __ ffree(); |
| 2265 | __ jmp(&call_runtime); |
| 2266 | } |
| 2267 | __ bind(¬_floats); |
| 2268 | break; |
| 2269 | } |
| 2270 | case Token::MOD: { |
| 2271 | // For MOD we go directly to runtime in the non-smi case. |
| 2272 | break; |
| 2273 | } |
| 2274 | case Token::BIT_OR: |
| 2275 | case Token::BIT_AND: |
| 2276 | case Token::BIT_XOR: |
| 2277 | case Token::SAR: |
| 2278 | case Token::SHL: |
| 2279 | case Token::SHR: { |
| 2280 | Label non_smi_result; |
| 2281 | FloatingPointHelper::LoadUnknownsAsIntegers(masm, |
| 2282 | use_sse3_, |
| 2283 | &call_runtime); |
| 2284 | switch (op_) { |
| 2285 | case Token::BIT_OR: __ or_(eax, Operand(ecx)); break; |
| 2286 | case Token::BIT_AND: __ and_(eax, Operand(ecx)); break; |
| 2287 | case Token::BIT_XOR: __ xor_(eax, Operand(ecx)); break; |
| 2288 | case Token::SAR: __ sar_cl(eax); break; |
| 2289 | case Token::SHL: __ shl_cl(eax); break; |
| 2290 | case Token::SHR: __ shr_cl(eax); break; |
| 2291 | default: UNREACHABLE(); |
| 2292 | } |
| 2293 | if (op_ == Token::SHR) { |
| 2294 | // Check if result is non-negative and fits in a smi. |
| 2295 | __ test(eax, Immediate(0xc0000000)); |
| 2296 | __ j(not_zero, &call_runtime); |
| 2297 | } else { |
| 2298 | // Check if result fits in a smi. |
| 2299 | __ cmp(eax, 0xc0000000); |
| 2300 | __ j(negative, &non_smi_result); |
| 2301 | } |
| 2302 | // Tag smi result and return. |
| 2303 | __ SmiTag(eax); |
| 2304 | __ ret(2 * kPointerSize); // Drop the arguments from the stack. |
| 2305 | |
| 2306 | // All ops except SHR return a signed int32 that we load in |
| 2307 | // a HeapNumber. |
| 2308 | if (op_ != Token::SHR) { |
| 2309 | __ bind(&non_smi_result); |
| 2310 | // Allocate a heap number if needed. |
| 2311 | __ mov(ebx, Operand(eax)); // ebx: result |
| 2312 | NearLabel skip_allocation; |
| 2313 | switch (mode_) { |
| 2314 | case OVERWRITE_LEFT: |
| 2315 | case OVERWRITE_RIGHT: |
| 2316 | // If the operand was an object, we skip the |
| 2317 | // allocation of a heap number. |
| 2318 | __ mov(eax, Operand(esp, mode_ == OVERWRITE_RIGHT ? |
| 2319 | 1 * kPointerSize : 2 * kPointerSize)); |
| 2320 | __ test(eax, Immediate(kSmiTagMask)); |
| 2321 | __ j(not_zero, &skip_allocation, not_taken); |
| 2322 | // Fall through! |
| 2323 | case NO_OVERWRITE: |
| 2324 | __ AllocateHeapNumber(eax, ecx, edx, &call_runtime); |
| 2325 | __ bind(&skip_allocation); |
| 2326 | break; |
| 2327 | default: UNREACHABLE(); |
| 2328 | } |
| 2329 | // Store the result in the HeapNumber and return. |
| 2330 | if (CpuFeatures::IsSupported(SSE2)) { |
| 2331 | CpuFeatures::Scope use_sse2(SSE2); |
| 2332 | __ cvtsi2sd(xmm0, Operand(ebx)); |
| 2333 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 2334 | } else { |
| 2335 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
| 2336 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 2337 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2338 | } |
| 2339 | __ ret(2 * kPointerSize); |
| 2340 | } |
| 2341 | break; |
| 2342 | } |
| 2343 | default: UNREACHABLE(); break; |
| 2344 | } |
| 2345 | |
| 2346 | // If all else fails, use the runtime system to get the correct |
| 2347 | // result. |
| 2348 | __ bind(&call_runtime); |
| 2349 | switch (op_) { |
| 2350 | case Token::ADD: { |
| 2351 | GenerateRegisterArgsPush(masm); |
| 2352 | // Test for string arguments before calling runtime. |
| 2353 | // Registers containing left and right operands respectively. |
| 2354 | Register lhs, rhs; |
| 2355 | lhs = edx; |
| 2356 | rhs = eax; |
| 2357 | |
| 2358 | // Test if left operand is a string. |
| 2359 | NearLabel lhs_not_string; |
| 2360 | __ test(lhs, Immediate(kSmiTagMask)); |
| 2361 | __ j(zero, &lhs_not_string); |
| 2362 | __ CmpObjectType(lhs, FIRST_NONSTRING_TYPE, ecx); |
| 2363 | __ j(above_equal, &lhs_not_string); |
| 2364 | |
| 2365 | StringAddStub string_add_left_stub(NO_STRING_CHECK_LEFT_IN_STUB); |
| 2366 | __ TailCallStub(&string_add_left_stub); |
| 2367 | |
| 2368 | NearLabel call_add_runtime; |
| 2369 | // Left operand is not a string, test right. |
| 2370 | __ bind(&lhs_not_string); |
| 2371 | __ test(rhs, Immediate(kSmiTagMask)); |
| 2372 | __ j(zero, &call_add_runtime); |
| 2373 | __ CmpObjectType(rhs, FIRST_NONSTRING_TYPE, ecx); |
| 2374 | __ j(above_equal, &call_add_runtime); |
| 2375 | |
| 2376 | StringAddStub string_add_right_stub(NO_STRING_CHECK_RIGHT_IN_STUB); |
| 2377 | __ TailCallStub(&string_add_right_stub); |
| 2378 | |
| 2379 | // Neither argument is a string. |
| 2380 | __ bind(&call_add_runtime); |
| 2381 | __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| 2382 | break; |
| 2383 | } |
| 2384 | case Token::SUB: |
| 2385 | GenerateRegisterArgsPush(masm); |
| 2386 | __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| 2387 | break; |
| 2388 | case Token::MUL: |
| 2389 | GenerateRegisterArgsPush(masm); |
| 2390 | __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
| 2391 | break; |
| 2392 | case Token::DIV: |
| 2393 | GenerateRegisterArgsPush(masm); |
| 2394 | __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| 2395 | break; |
| 2396 | case Token::MOD: |
| 2397 | __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| 2398 | break; |
| 2399 | case Token::BIT_OR: |
| 2400 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| 2401 | break; |
| 2402 | case Token::BIT_AND: |
| 2403 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| 2404 | break; |
| 2405 | case Token::BIT_XOR: |
| 2406 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| 2407 | break; |
| 2408 | case Token::SAR: |
| 2409 | __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| 2410 | break; |
| 2411 | case Token::SHL: |
| 2412 | __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| 2413 | break; |
| 2414 | case Token::SHR: |
| 2415 | __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| 2416 | break; |
| 2417 | default: |
| 2418 | UNREACHABLE(); |
| 2419 | } |
| 2420 | } |
| 2421 | |
| 2422 | |
| 2423 | void TypeRecordingBinaryOpStub::GenerateHeapResultAllocation( |
| 2424 | MacroAssembler* masm, |
| 2425 | Label* alloc_failure) { |
| 2426 | Label skip_allocation; |
| 2427 | OverwriteMode mode = mode_; |
| 2428 | switch (mode) { |
| 2429 | case OVERWRITE_LEFT: { |
| 2430 | // If the argument in edx is already an object, we skip the |
| 2431 | // allocation of a heap number. |
| 2432 | __ test(edx, Immediate(kSmiTagMask)); |
| 2433 | __ j(not_zero, &skip_allocation, not_taken); |
| 2434 | // Allocate a heap number for the result. Keep eax and edx intact |
| 2435 | // for the possible runtime call. |
| 2436 | __ AllocateHeapNumber(ebx, ecx, no_reg, alloc_failure); |
| 2437 | // Now edx can be overwritten losing one of the arguments as we are |
| 2438 | // now done and will not need it any more. |
| 2439 | __ mov(edx, Operand(ebx)); |
| 2440 | __ bind(&skip_allocation); |
| 2441 | // Use object in edx as a result holder |
| 2442 | __ mov(eax, Operand(edx)); |
| 2443 | break; |
| 2444 | } |
| 2445 | case OVERWRITE_RIGHT: |
| 2446 | // If the argument in eax is already an object, we skip the |
| 2447 | // allocation of a heap number. |
| 2448 | __ test(eax, Immediate(kSmiTagMask)); |
| 2449 | __ j(not_zero, &skip_allocation, not_taken); |
| 2450 | // Fall through! |
| 2451 | case NO_OVERWRITE: |
| 2452 | // Allocate a heap number for the result. Keep eax and edx intact |
| 2453 | // for the possible runtime call. |
| 2454 | __ AllocateHeapNumber(ebx, ecx, no_reg, alloc_failure); |
| 2455 | // Now eax can be overwritten losing one of the arguments as we are |
| 2456 | // now done and will not need it any more. |
| 2457 | __ mov(eax, ebx); |
| 2458 | __ bind(&skip_allocation); |
| 2459 | break; |
| 2460 | default: UNREACHABLE(); |
| 2461 | } |
| 2462 | } |
| 2463 | |
| 2464 | |
| 2465 | void TypeRecordingBinaryOpStub::GenerateRegisterArgsPush(MacroAssembler* masm) { |
| 2466 | __ pop(ecx); |
| 2467 | __ push(edx); |
| 2468 | __ push(eax); |
| 2469 | __ push(ecx); |
| 2470 | } |
| 2471 | |
| 2472 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2473 | void TranscendentalCacheStub::Generate(MacroAssembler* masm) { |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2474 | // TAGGED case: |
| 2475 | // Input: |
| 2476 | // esp[4]: tagged number input argument (should be number). |
| 2477 | // esp[0]: return address. |
| 2478 | // Output: |
| 2479 | // eax: tagged double result. |
| 2480 | // UNTAGGED case: |
| 2481 | // Input:: |
| 2482 | // esp[0]: return address. |
| 2483 | // xmm1: untagged double input argument |
| 2484 | // Output: |
| 2485 | // xmm1: untagged double result. |
| 2486 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2487 | Label runtime_call; |
| 2488 | Label runtime_call_clear_stack; |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2489 | Label skip_cache; |
| 2490 | const bool tagged = (argument_type_ == TAGGED); |
| 2491 | if (tagged) { |
| 2492 | // Test that eax is a number. |
| 2493 | NearLabel input_not_smi; |
| 2494 | NearLabel loaded; |
| 2495 | __ mov(eax, Operand(esp, kPointerSize)); |
| 2496 | __ test(eax, Immediate(kSmiTagMask)); |
| 2497 | __ j(not_zero, &input_not_smi); |
| 2498 | // Input is a smi. Untag and load it onto the FPU stack. |
| 2499 | // Then load the low and high words of the double into ebx, edx. |
| 2500 | STATIC_ASSERT(kSmiTagSize == 1); |
| 2501 | __ sar(eax, 1); |
| 2502 | __ sub(Operand(esp), Immediate(2 * kPointerSize)); |
| 2503 | __ mov(Operand(esp, 0), eax); |
| 2504 | __ fild_s(Operand(esp, 0)); |
| 2505 | __ fst_d(Operand(esp, 0)); |
| 2506 | __ pop(edx); |
| 2507 | __ pop(ebx); |
| 2508 | __ jmp(&loaded); |
| 2509 | __ bind(&input_not_smi); |
| 2510 | // Check if input is a HeapNumber. |
| 2511 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 2512 | __ cmp(Operand(ebx), Immediate(Factory::heap_number_map())); |
| 2513 | __ j(not_equal, &runtime_call); |
| 2514 | // Input is a HeapNumber. Push it on the FPU stack and load its |
| 2515 | // low and high words into ebx, edx. |
| 2516 | __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2517 | __ mov(edx, FieldOperand(eax, HeapNumber::kExponentOffset)); |
| 2518 | __ mov(ebx, FieldOperand(eax, HeapNumber::kMantissaOffset)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2519 | |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2520 | __ bind(&loaded); |
| 2521 | } else { // UNTAGGED. |
| 2522 | if (CpuFeatures::IsSupported(SSE4_1)) { |
| 2523 | CpuFeatures::Scope sse4_scope(SSE4_1); |
| 2524 | __ pextrd(Operand(edx), xmm1, 0x1); // copy xmm1[63..32] to edx. |
| 2525 | } else { |
| 2526 | __ pshufd(xmm0, xmm1, 0x1); |
| 2527 | __ movd(Operand(edx), xmm0); |
| 2528 | } |
| 2529 | __ movd(Operand(ebx), xmm1); |
| 2530 | } |
| 2531 | |
| 2532 | // ST[0] or xmm1 == double value |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2533 | // ebx = low 32 bits of double value |
| 2534 | // edx = high 32 bits of double value |
| 2535 | // Compute hash (the shifts are arithmetic): |
| 2536 | // h = (low ^ high); h ^= h >> 16; h ^= h >> 8; h = h & (cacheSize - 1); |
| 2537 | __ mov(ecx, ebx); |
| 2538 | __ xor_(ecx, Operand(edx)); |
| 2539 | __ mov(eax, ecx); |
| 2540 | __ sar(eax, 16); |
| 2541 | __ xor_(ecx, Operand(eax)); |
| 2542 | __ mov(eax, ecx); |
| 2543 | __ sar(eax, 8); |
| 2544 | __ xor_(ecx, Operand(eax)); |
| 2545 | ASSERT(IsPowerOf2(TranscendentalCache::kCacheSize)); |
| 2546 | __ and_(Operand(ecx), Immediate(TranscendentalCache::kCacheSize - 1)); |
| 2547 | |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2548 | // ST[0] or xmm1 == double value. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2549 | // ebx = low 32 bits of double value. |
| 2550 | // edx = high 32 bits of double value. |
| 2551 | // ecx = TranscendentalCache::hash(double value). |
| 2552 | __ mov(eax, |
| 2553 | Immediate(ExternalReference::transcendental_cache_array_address())); |
| 2554 | // Eax points to cache array. |
| 2555 | __ mov(eax, Operand(eax, type_ * sizeof(TranscendentalCache::caches_[0]))); |
| 2556 | // Eax points to the cache for the type type_. |
| 2557 | // If NULL, the cache hasn't been initialized yet, so go through runtime. |
| 2558 | __ test(eax, Operand(eax)); |
| 2559 | __ j(zero, &runtime_call_clear_stack); |
| 2560 | #ifdef DEBUG |
| 2561 | // Check that the layout of cache elements match expectations. |
| 2562 | { TranscendentalCache::Element test_elem[2]; |
| 2563 | char* elem_start = reinterpret_cast<char*>(&test_elem[0]); |
| 2564 | char* elem2_start = reinterpret_cast<char*>(&test_elem[1]); |
| 2565 | char* elem_in0 = reinterpret_cast<char*>(&(test_elem[0].in[0])); |
| 2566 | char* elem_in1 = reinterpret_cast<char*>(&(test_elem[0].in[1])); |
| 2567 | char* elem_out = reinterpret_cast<char*>(&(test_elem[0].output)); |
| 2568 | CHECK_EQ(12, elem2_start - elem_start); // Two uint_32's and a pointer. |
| 2569 | CHECK_EQ(0, elem_in0 - elem_start); |
| 2570 | CHECK_EQ(kIntSize, elem_in1 - elem_start); |
| 2571 | CHECK_EQ(2 * kIntSize, elem_out - elem_start); |
| 2572 | } |
| 2573 | #endif |
| 2574 | // Find the address of the ecx'th entry in the cache, i.e., &eax[ecx*12]. |
| 2575 | __ lea(ecx, Operand(ecx, ecx, times_2, 0)); |
| 2576 | __ lea(ecx, Operand(eax, ecx, times_4, 0)); |
| 2577 | // Check if cache matches: Double value is stored in uint32_t[2] array. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 2578 | NearLabel cache_miss; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2579 | __ cmp(ebx, Operand(ecx, 0)); |
| 2580 | __ j(not_equal, &cache_miss); |
| 2581 | __ cmp(edx, Operand(ecx, kIntSize)); |
| 2582 | __ j(not_equal, &cache_miss); |
| 2583 | // Cache hit! |
| 2584 | __ mov(eax, Operand(ecx, 2 * kIntSize)); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2585 | if (tagged) { |
| 2586 | __ fstp(0); |
| 2587 | __ ret(kPointerSize); |
| 2588 | } else { // UNTAGGED. |
| 2589 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2590 | __ Ret(); |
| 2591 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2592 | |
| 2593 | __ bind(&cache_miss); |
| 2594 | // Update cache with new value. |
| 2595 | // We are short on registers, so use no_reg as scratch. |
| 2596 | // This gives slightly larger code. |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2597 | if (tagged) { |
| 2598 | __ AllocateHeapNumber(eax, edi, no_reg, &runtime_call_clear_stack); |
| 2599 | } else { // UNTAGGED. |
| 2600 | __ AllocateHeapNumber(eax, edi, no_reg, &skip_cache); |
| 2601 | __ sub(Operand(esp), Immediate(kDoubleSize)); |
| 2602 | __ movdbl(Operand(esp, 0), xmm1); |
| 2603 | __ fld_d(Operand(esp, 0)); |
| 2604 | __ add(Operand(esp), Immediate(kDoubleSize)); |
| 2605 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2606 | GenerateOperation(masm); |
| 2607 | __ mov(Operand(ecx, 0), ebx); |
| 2608 | __ mov(Operand(ecx, kIntSize), edx); |
| 2609 | __ mov(Operand(ecx, 2 * kIntSize), eax); |
| 2610 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2611 | if (tagged) { |
| 2612 | __ ret(kPointerSize); |
| 2613 | } else { // UNTAGGED. |
| 2614 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2615 | __ Ret(); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2616 | |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2617 | // Skip cache and return answer directly, only in untagged case. |
| 2618 | __ bind(&skip_cache); |
| 2619 | __ sub(Operand(esp), Immediate(kDoubleSize)); |
| 2620 | __ movdbl(Operand(esp, 0), xmm1); |
| 2621 | __ fld_d(Operand(esp, 0)); |
| 2622 | GenerateOperation(masm); |
| 2623 | __ fstp_d(Operand(esp, 0)); |
| 2624 | __ movdbl(xmm1, Operand(esp, 0)); |
| 2625 | __ add(Operand(esp), Immediate(kDoubleSize)); |
| 2626 | // We return the value in xmm1 without adding it to the cache, but |
| 2627 | // we cause a scavenging GC so that future allocations will succeed. |
| 2628 | __ EnterInternalFrame(); |
| 2629 | // Allocate an unused object bigger than a HeapNumber. |
| 2630 | __ push(Immediate(Smi::FromInt(2 * kDoubleSize))); |
| 2631 | __ CallRuntimeSaveDoubles(Runtime::kAllocateInNewSpace); |
| 2632 | __ LeaveInternalFrame(); |
| 2633 | __ Ret(); |
| 2634 | } |
| 2635 | |
| 2636 | // Call runtime, doing whatever allocation and cleanup is necessary. |
| 2637 | if (tagged) { |
| 2638 | __ bind(&runtime_call_clear_stack); |
| 2639 | __ fstp(0); |
| 2640 | __ bind(&runtime_call); |
| 2641 | __ TailCallExternalReference(ExternalReference(RuntimeFunction()), 1, 1); |
| 2642 | } else { // UNTAGGED. |
| 2643 | __ bind(&runtime_call_clear_stack); |
| 2644 | __ bind(&runtime_call); |
| 2645 | __ AllocateHeapNumber(eax, edi, no_reg, &skip_cache); |
| 2646 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm1); |
| 2647 | __ EnterInternalFrame(); |
| 2648 | __ push(eax); |
| 2649 | __ CallRuntime(RuntimeFunction(), 1); |
| 2650 | __ LeaveInternalFrame(); |
| 2651 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 2652 | __ Ret(); |
| 2653 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2654 | } |
| 2655 | |
| 2656 | |
| 2657 | Runtime::FunctionId TranscendentalCacheStub::RuntimeFunction() { |
| 2658 | switch (type_) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2659 | case TranscendentalCache::SIN: return Runtime::kMath_sin; |
| 2660 | case TranscendentalCache::COS: return Runtime::kMath_cos; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2661 | case TranscendentalCache::LOG: return Runtime::kMath_log; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2662 | default: |
| 2663 | UNIMPLEMENTED(); |
| 2664 | return Runtime::kAbort; |
| 2665 | } |
| 2666 | } |
| 2667 | |
| 2668 | |
| 2669 | void TranscendentalCacheStub::GenerateOperation(MacroAssembler* masm) { |
| 2670 | // Only free register is edi. |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2671 | // Input value is on FP stack, and also in ebx/edx. |
| 2672 | // Input value is possibly in xmm1. |
| 2673 | // Address of result (a newly allocated HeapNumber) may be in eax. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2674 | if (type_ == TranscendentalCache::SIN || type_ == TranscendentalCache::COS) { |
| 2675 | // Both fsin and fcos require arguments in the range +/-2^63 and |
| 2676 | // return NaN for infinities and NaN. They can share all code except |
| 2677 | // the actual fsin/fcos operation. |
whesse@chromium.org | 023421e | 2010-12-21 12:19:12 +0000 | [diff] [blame] | 2678 | NearLabel in_range, done; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2679 | // If argument is outside the range -2^63..2^63, fsin/cos doesn't |
| 2680 | // work. We must reduce it to the appropriate range. |
| 2681 | __ mov(edi, edx); |
| 2682 | __ and_(Operand(edi), Immediate(0x7ff00000)); // Exponent only. |
| 2683 | int supported_exponent_limit = |
| 2684 | (63 + HeapNumber::kExponentBias) << HeapNumber::kExponentShift; |
| 2685 | __ cmp(Operand(edi), Immediate(supported_exponent_limit)); |
| 2686 | __ j(below, &in_range, taken); |
| 2687 | // Check for infinity and NaN. Both return NaN for sin. |
| 2688 | __ cmp(Operand(edi), Immediate(0x7ff00000)); |
| 2689 | NearLabel non_nan_result; |
| 2690 | __ j(not_equal, &non_nan_result, taken); |
| 2691 | // Input is +/-Infinity or NaN. Result is NaN. |
| 2692 | __ fstp(0); |
| 2693 | // NaN is represented by 0x7ff8000000000000. |
| 2694 | __ push(Immediate(0x7ff80000)); |
| 2695 | __ push(Immediate(0)); |
| 2696 | __ fld_d(Operand(esp, 0)); |
| 2697 | __ add(Operand(esp), Immediate(2 * kPointerSize)); |
| 2698 | __ jmp(&done); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2699 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2700 | __ bind(&non_nan_result); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2701 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2702 | // Use fpmod to restrict argument to the range +/-2*PI. |
| 2703 | __ mov(edi, eax); // Save eax before using fnstsw_ax. |
| 2704 | __ fldpi(); |
| 2705 | __ fadd(0); |
| 2706 | __ fld(1); |
| 2707 | // FPU Stack: input, 2*pi, input. |
| 2708 | { |
| 2709 | NearLabel no_exceptions; |
| 2710 | __ fwait(); |
| 2711 | __ fnstsw_ax(); |
| 2712 | // Clear if Illegal Operand or Zero Division exceptions are set. |
| 2713 | __ test(Operand(eax), Immediate(5)); |
| 2714 | __ j(zero, &no_exceptions); |
| 2715 | __ fnclex(); |
| 2716 | __ bind(&no_exceptions); |
| 2717 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2718 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2719 | // Compute st(0) % st(1) |
| 2720 | { |
| 2721 | NearLabel partial_remainder_loop; |
| 2722 | __ bind(&partial_remainder_loop); |
| 2723 | __ fprem1(); |
| 2724 | __ fwait(); |
| 2725 | __ fnstsw_ax(); |
| 2726 | __ test(Operand(eax), Immediate(0x400 /* C2 */)); |
| 2727 | // If C2 is set, computation only has partial result. Loop to |
| 2728 | // continue computation. |
| 2729 | __ j(not_zero, &partial_remainder_loop); |
| 2730 | } |
| 2731 | // FPU Stack: input, 2*pi, input % 2*pi |
| 2732 | __ fstp(2); |
| 2733 | __ fstp(0); |
| 2734 | __ mov(eax, edi); // Restore eax (allocated HeapNumber pointer). |
| 2735 | |
| 2736 | // FPU Stack: input % 2*pi |
| 2737 | __ bind(&in_range); |
| 2738 | switch (type_) { |
| 2739 | case TranscendentalCache::SIN: |
| 2740 | __ fsin(); |
| 2741 | break; |
| 2742 | case TranscendentalCache::COS: |
| 2743 | __ fcos(); |
| 2744 | break; |
| 2745 | default: |
| 2746 | UNREACHABLE(); |
| 2747 | } |
| 2748 | __ bind(&done); |
| 2749 | } else { |
| 2750 | ASSERT(type_ == TranscendentalCache::LOG); |
| 2751 | __ fldln2(); |
| 2752 | __ fxch(); |
| 2753 | __ fyl2x(); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2754 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2755 | } |
| 2756 | |
| 2757 | |
| 2758 | // Get the integer part of a heap number. Surprisingly, all this bit twiddling |
| 2759 | // is faster than using the built-in instructions on floating point registers. |
| 2760 | // Trashes edi and ebx. Dest is ecx. Source cannot be ecx or one of the |
| 2761 | // trashed registers. |
| 2762 | void IntegerConvert(MacroAssembler* masm, |
| 2763 | Register source, |
| 2764 | TypeInfo type_info, |
| 2765 | bool use_sse3, |
| 2766 | Label* conversion_failure) { |
| 2767 | ASSERT(!source.is(ecx) && !source.is(edi) && !source.is(ebx)); |
| 2768 | Label done, right_exponent, normal_exponent; |
| 2769 | Register scratch = ebx; |
| 2770 | Register scratch2 = edi; |
| 2771 | if (type_info.IsInteger32() && CpuFeatures::IsEnabled(SSE2)) { |
| 2772 | CpuFeatures::Scope scope(SSE2); |
| 2773 | __ cvttsd2si(ecx, FieldOperand(source, HeapNumber::kValueOffset)); |
| 2774 | return; |
| 2775 | } |
| 2776 | if (!type_info.IsInteger32() || !use_sse3) { |
| 2777 | // Get exponent word. |
| 2778 | __ mov(scratch, FieldOperand(source, HeapNumber::kExponentOffset)); |
| 2779 | // Get exponent alone in scratch2. |
| 2780 | __ mov(scratch2, scratch); |
| 2781 | __ and_(scratch2, HeapNumber::kExponentMask); |
| 2782 | } |
| 2783 | if (use_sse3) { |
| 2784 | CpuFeatures::Scope scope(SSE3); |
| 2785 | if (!type_info.IsInteger32()) { |
| 2786 | // Check whether the exponent is too big for a 64 bit signed integer. |
| 2787 | static const uint32_t kTooBigExponent = |
| 2788 | (HeapNumber::kExponentBias + 63) << HeapNumber::kExponentShift; |
| 2789 | __ cmp(Operand(scratch2), Immediate(kTooBigExponent)); |
| 2790 | __ j(greater_equal, conversion_failure); |
| 2791 | } |
| 2792 | // Load x87 register with heap number. |
| 2793 | __ fld_d(FieldOperand(source, HeapNumber::kValueOffset)); |
| 2794 | // Reserve space for 64 bit answer. |
| 2795 | __ sub(Operand(esp), Immediate(sizeof(uint64_t))); // Nolint. |
| 2796 | // Do conversion, which cannot fail because we checked the exponent. |
| 2797 | __ fisttp_d(Operand(esp, 0)); |
| 2798 | __ mov(ecx, Operand(esp, 0)); // Load low word of answer into ecx. |
| 2799 | __ add(Operand(esp), Immediate(sizeof(uint64_t))); // Nolint. |
| 2800 | } else { |
| 2801 | // Load ecx with zero. We use this either for the final shift or |
| 2802 | // for the answer. |
| 2803 | __ xor_(ecx, Operand(ecx)); |
| 2804 | // Check whether the exponent matches a 32 bit signed int that cannot be |
| 2805 | // represented by a Smi. A non-smi 32 bit integer is 1.xxx * 2^30 so the |
| 2806 | // exponent is 30 (biased). This is the exponent that we are fastest at and |
| 2807 | // also the highest exponent we can handle here. |
| 2808 | const uint32_t non_smi_exponent = |
| 2809 | (HeapNumber::kExponentBias + 30) << HeapNumber::kExponentShift; |
| 2810 | __ cmp(Operand(scratch2), Immediate(non_smi_exponent)); |
| 2811 | // If we have a match of the int32-but-not-Smi exponent then skip some |
| 2812 | // logic. |
| 2813 | __ j(equal, &right_exponent); |
| 2814 | // If the exponent is higher than that then go to slow case. This catches |
| 2815 | // numbers that don't fit in a signed int32, infinities and NaNs. |
| 2816 | __ j(less, &normal_exponent); |
| 2817 | |
| 2818 | { |
| 2819 | // Handle a big exponent. The only reason we have this code is that the |
| 2820 | // >>> operator has a tendency to generate numbers with an exponent of 31. |
| 2821 | const uint32_t big_non_smi_exponent = |
| 2822 | (HeapNumber::kExponentBias + 31) << HeapNumber::kExponentShift; |
| 2823 | __ cmp(Operand(scratch2), Immediate(big_non_smi_exponent)); |
| 2824 | __ j(not_equal, conversion_failure); |
| 2825 | // We have the big exponent, typically from >>>. This means the number is |
| 2826 | // in the range 2^31 to 2^32 - 1. Get the top bits of the mantissa. |
| 2827 | __ mov(scratch2, scratch); |
| 2828 | __ and_(scratch2, HeapNumber::kMantissaMask); |
| 2829 | // Put back the implicit 1. |
| 2830 | __ or_(scratch2, 1 << HeapNumber::kExponentShift); |
| 2831 | // Shift up the mantissa bits to take up the space the exponent used to |
| 2832 | // take. We just orred in the implicit bit so that took care of one and |
| 2833 | // we want to use the full unsigned range so we subtract 1 bit from the |
| 2834 | // shift distance. |
| 2835 | const int big_shift_distance = HeapNumber::kNonMantissaBitsInTopWord - 1; |
| 2836 | __ shl(scratch2, big_shift_distance); |
| 2837 | // Get the second half of the double. |
| 2838 | __ mov(ecx, FieldOperand(source, HeapNumber::kMantissaOffset)); |
| 2839 | // Shift down 21 bits to get the most significant 11 bits or the low |
| 2840 | // mantissa word. |
| 2841 | __ shr(ecx, 32 - big_shift_distance); |
| 2842 | __ or_(ecx, Operand(scratch2)); |
| 2843 | // We have the answer in ecx, but we may need to negate it. |
| 2844 | __ test(scratch, Operand(scratch)); |
| 2845 | __ j(positive, &done); |
| 2846 | __ neg(ecx); |
| 2847 | __ jmp(&done); |
| 2848 | } |
| 2849 | |
| 2850 | __ bind(&normal_exponent); |
| 2851 | // Exponent word in scratch, exponent part of exponent word in scratch2. |
| 2852 | // Zero in ecx. |
| 2853 | // We know the exponent is smaller than 30 (biased). If it is less than |
| 2854 | // 0 (biased) then the number is smaller in magnitude than 1.0 * 2^0, ie |
| 2855 | // it rounds to zero. |
| 2856 | const uint32_t zero_exponent = |
| 2857 | (HeapNumber::kExponentBias + 0) << HeapNumber::kExponentShift; |
| 2858 | __ sub(Operand(scratch2), Immediate(zero_exponent)); |
| 2859 | // ecx already has a Smi zero. |
| 2860 | __ j(less, &done); |
| 2861 | |
| 2862 | // We have a shifted exponent between 0 and 30 in scratch2. |
| 2863 | __ shr(scratch2, HeapNumber::kExponentShift); |
| 2864 | __ mov(ecx, Immediate(30)); |
| 2865 | __ sub(ecx, Operand(scratch2)); |
| 2866 | |
| 2867 | __ bind(&right_exponent); |
| 2868 | // Here ecx is the shift, scratch is the exponent word. |
| 2869 | // Get the top bits of the mantissa. |
| 2870 | __ and_(scratch, HeapNumber::kMantissaMask); |
| 2871 | // Put back the implicit 1. |
| 2872 | __ or_(scratch, 1 << HeapNumber::kExponentShift); |
| 2873 | // Shift up the mantissa bits to take up the space the exponent used to |
| 2874 | // take. We have kExponentShift + 1 significant bits int he low end of the |
| 2875 | // word. Shift them to the top bits. |
| 2876 | const int shift_distance = HeapNumber::kNonMantissaBitsInTopWord - 2; |
| 2877 | __ shl(scratch, shift_distance); |
| 2878 | // Get the second half of the double. For some exponents we don't |
| 2879 | // actually need this because the bits get shifted out again, but |
| 2880 | // it's probably slower to test than just to do it. |
| 2881 | __ mov(scratch2, FieldOperand(source, HeapNumber::kMantissaOffset)); |
| 2882 | // Shift down 22 bits to get the most significant 10 bits or the low |
| 2883 | // mantissa word. |
| 2884 | __ shr(scratch2, 32 - shift_distance); |
| 2885 | __ or_(scratch2, Operand(scratch)); |
| 2886 | // Move down according to the exponent. |
| 2887 | __ shr_cl(scratch2); |
| 2888 | // Now the unsigned answer is in scratch2. We need to move it to ecx and |
| 2889 | // we may need to fix the sign. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 2890 | NearLabel negative; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 2891 | __ xor_(ecx, Operand(ecx)); |
| 2892 | __ cmp(ecx, FieldOperand(source, HeapNumber::kExponentOffset)); |
| 2893 | __ j(greater, &negative); |
| 2894 | __ mov(ecx, scratch2); |
| 2895 | __ jmp(&done); |
| 2896 | __ bind(&negative); |
| 2897 | __ sub(ecx, Operand(scratch2)); |
| 2898 | __ bind(&done); |
| 2899 | } |
| 2900 | } |
| 2901 | |
| 2902 | |
| 2903 | // Input: edx, eax are the left and right objects of a bit op. |
| 2904 | // Output: eax, ecx are left and right integers for a bit op. |
| 2905 | void FloatingPointHelper::LoadNumbersAsIntegers(MacroAssembler* masm, |
| 2906 | TypeInfo type_info, |
| 2907 | bool use_sse3, |
| 2908 | Label* conversion_failure) { |
| 2909 | // Check float operands. |
| 2910 | Label arg1_is_object, check_undefined_arg1; |
| 2911 | Label arg2_is_object, check_undefined_arg2; |
| 2912 | Label load_arg2, done; |
| 2913 | |
| 2914 | if (!type_info.IsDouble()) { |
| 2915 | if (!type_info.IsSmi()) { |
| 2916 | __ test(edx, Immediate(kSmiTagMask)); |
| 2917 | __ j(not_zero, &arg1_is_object); |
| 2918 | } else { |
| 2919 | if (FLAG_debug_code) __ AbortIfNotSmi(edx); |
| 2920 | } |
| 2921 | __ SmiUntag(edx); |
| 2922 | __ jmp(&load_arg2); |
| 2923 | } |
| 2924 | |
| 2925 | __ bind(&arg1_is_object); |
| 2926 | |
| 2927 | // Get the untagged integer version of the edx heap number in ecx. |
| 2928 | IntegerConvert(masm, edx, type_info, use_sse3, conversion_failure); |
| 2929 | __ mov(edx, ecx); |
| 2930 | |
| 2931 | // Here edx has the untagged integer, eax has a Smi or a heap number. |
| 2932 | __ bind(&load_arg2); |
| 2933 | if (!type_info.IsDouble()) { |
| 2934 | // Test if arg2 is a Smi. |
| 2935 | if (!type_info.IsSmi()) { |
| 2936 | __ test(eax, Immediate(kSmiTagMask)); |
| 2937 | __ j(not_zero, &arg2_is_object); |
| 2938 | } else { |
| 2939 | if (FLAG_debug_code) __ AbortIfNotSmi(eax); |
| 2940 | } |
| 2941 | __ SmiUntag(eax); |
| 2942 | __ mov(ecx, eax); |
| 2943 | __ jmp(&done); |
| 2944 | } |
| 2945 | |
| 2946 | __ bind(&arg2_is_object); |
| 2947 | |
| 2948 | // Get the untagged integer version of the eax heap number in ecx. |
| 2949 | IntegerConvert(masm, eax, type_info, use_sse3, conversion_failure); |
| 2950 | __ bind(&done); |
| 2951 | __ mov(eax, edx); |
| 2952 | } |
| 2953 | |
| 2954 | |
| 2955 | // Input: edx, eax are the left and right objects of a bit op. |
| 2956 | // Output: eax, ecx are left and right integers for a bit op. |
| 2957 | void FloatingPointHelper::LoadUnknownsAsIntegers(MacroAssembler* masm, |
| 2958 | bool use_sse3, |
| 2959 | Label* conversion_failure) { |
| 2960 | // Check float operands. |
| 2961 | Label arg1_is_object, check_undefined_arg1; |
| 2962 | Label arg2_is_object, check_undefined_arg2; |
| 2963 | Label load_arg2, done; |
| 2964 | |
| 2965 | // Test if arg1 is a Smi. |
| 2966 | __ test(edx, Immediate(kSmiTagMask)); |
| 2967 | __ j(not_zero, &arg1_is_object); |
| 2968 | |
| 2969 | __ SmiUntag(edx); |
| 2970 | __ jmp(&load_arg2); |
| 2971 | |
| 2972 | // If the argument is undefined it converts to zero (ECMA-262, section 9.5). |
| 2973 | __ bind(&check_undefined_arg1); |
| 2974 | __ cmp(edx, Factory::undefined_value()); |
| 2975 | __ j(not_equal, conversion_failure); |
| 2976 | __ mov(edx, Immediate(0)); |
| 2977 | __ jmp(&load_arg2); |
| 2978 | |
| 2979 | __ bind(&arg1_is_object); |
| 2980 | __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 2981 | __ cmp(ebx, Factory::heap_number_map()); |
| 2982 | __ j(not_equal, &check_undefined_arg1); |
| 2983 | |
| 2984 | // Get the untagged integer version of the edx heap number in ecx. |
| 2985 | IntegerConvert(masm, |
| 2986 | edx, |
| 2987 | TypeInfo::Unknown(), |
| 2988 | use_sse3, |
| 2989 | conversion_failure); |
| 2990 | __ mov(edx, ecx); |
| 2991 | |
| 2992 | // Here edx has the untagged integer, eax has a Smi or a heap number. |
| 2993 | __ bind(&load_arg2); |
| 2994 | |
| 2995 | // Test if arg2 is a Smi. |
| 2996 | __ test(eax, Immediate(kSmiTagMask)); |
| 2997 | __ j(not_zero, &arg2_is_object); |
| 2998 | |
| 2999 | __ SmiUntag(eax); |
| 3000 | __ mov(ecx, eax); |
| 3001 | __ jmp(&done); |
| 3002 | |
| 3003 | // If the argument is undefined it converts to zero (ECMA-262, section 9.5). |
| 3004 | __ bind(&check_undefined_arg2); |
| 3005 | __ cmp(eax, Factory::undefined_value()); |
| 3006 | __ j(not_equal, conversion_failure); |
| 3007 | __ mov(ecx, Immediate(0)); |
| 3008 | __ jmp(&done); |
| 3009 | |
| 3010 | __ bind(&arg2_is_object); |
| 3011 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3012 | __ cmp(ebx, Factory::heap_number_map()); |
| 3013 | __ j(not_equal, &check_undefined_arg2); |
| 3014 | |
| 3015 | // Get the untagged integer version of the eax heap number in ecx. |
| 3016 | IntegerConvert(masm, |
| 3017 | eax, |
| 3018 | TypeInfo::Unknown(), |
| 3019 | use_sse3, |
| 3020 | conversion_failure); |
| 3021 | __ bind(&done); |
| 3022 | __ mov(eax, edx); |
| 3023 | } |
| 3024 | |
| 3025 | |
| 3026 | void FloatingPointHelper::LoadAsIntegers(MacroAssembler* masm, |
| 3027 | TypeInfo type_info, |
| 3028 | bool use_sse3, |
| 3029 | Label* conversion_failure) { |
| 3030 | if (type_info.IsNumber()) { |
| 3031 | LoadNumbersAsIntegers(masm, type_info, use_sse3, conversion_failure); |
| 3032 | } else { |
| 3033 | LoadUnknownsAsIntegers(masm, use_sse3, conversion_failure); |
| 3034 | } |
| 3035 | } |
| 3036 | |
| 3037 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3038 | void FloatingPointHelper::CheckLoadedIntegersWereInt32(MacroAssembler* masm, |
| 3039 | bool use_sse3, |
| 3040 | Label* not_int32) { |
| 3041 | return; |
| 3042 | } |
| 3043 | |
| 3044 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3045 | void FloatingPointHelper::LoadFloatOperand(MacroAssembler* masm, |
| 3046 | Register number) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3047 | NearLabel load_smi, done; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3048 | |
| 3049 | __ test(number, Immediate(kSmiTagMask)); |
| 3050 | __ j(zero, &load_smi, not_taken); |
| 3051 | __ fld_d(FieldOperand(number, HeapNumber::kValueOffset)); |
| 3052 | __ jmp(&done); |
| 3053 | |
| 3054 | __ bind(&load_smi); |
| 3055 | __ SmiUntag(number); |
| 3056 | __ push(number); |
| 3057 | __ fild_s(Operand(esp, 0)); |
| 3058 | __ pop(number); |
| 3059 | |
| 3060 | __ bind(&done); |
| 3061 | } |
| 3062 | |
| 3063 | |
| 3064 | void FloatingPointHelper::LoadSSE2Operands(MacroAssembler* masm) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3065 | NearLabel load_smi_edx, load_eax, load_smi_eax, done; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3066 | // Load operand in edx into xmm0. |
| 3067 | __ test(edx, Immediate(kSmiTagMask)); |
| 3068 | __ j(zero, &load_smi_edx, not_taken); // Argument in edx is a smi. |
| 3069 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 3070 | |
| 3071 | __ bind(&load_eax); |
| 3072 | // Load operand in eax into xmm1. |
| 3073 | __ test(eax, Immediate(kSmiTagMask)); |
| 3074 | __ j(zero, &load_smi_eax, not_taken); // Argument in eax is a smi. |
| 3075 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 3076 | __ jmp(&done); |
| 3077 | |
| 3078 | __ bind(&load_smi_edx); |
| 3079 | __ SmiUntag(edx); // Untag smi before converting to float. |
| 3080 | __ cvtsi2sd(xmm0, Operand(edx)); |
| 3081 | __ SmiTag(edx); // Retag smi for heap number overwriting test. |
| 3082 | __ jmp(&load_eax); |
| 3083 | |
| 3084 | __ bind(&load_smi_eax); |
| 3085 | __ SmiUntag(eax); // Untag smi before converting to float. |
| 3086 | __ cvtsi2sd(xmm1, Operand(eax)); |
| 3087 | __ SmiTag(eax); // Retag smi for heap number overwriting test. |
| 3088 | |
| 3089 | __ bind(&done); |
| 3090 | } |
| 3091 | |
| 3092 | |
| 3093 | void FloatingPointHelper::LoadSSE2Operands(MacroAssembler* masm, |
| 3094 | Label* not_numbers) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3095 | NearLabel load_smi_edx, load_eax, load_smi_eax, load_float_eax, done; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3096 | // Load operand in edx into xmm0, or branch to not_numbers. |
| 3097 | __ test(edx, Immediate(kSmiTagMask)); |
| 3098 | __ j(zero, &load_smi_edx, not_taken); // Argument in edx is a smi. |
| 3099 | __ cmp(FieldOperand(edx, HeapObject::kMapOffset), Factory::heap_number_map()); |
| 3100 | __ j(not_equal, not_numbers); // Argument in edx is not a number. |
| 3101 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 3102 | __ bind(&load_eax); |
| 3103 | // Load operand in eax into xmm1, or branch to not_numbers. |
| 3104 | __ test(eax, Immediate(kSmiTagMask)); |
| 3105 | __ j(zero, &load_smi_eax, not_taken); // Argument in eax is a smi. |
| 3106 | __ cmp(FieldOperand(eax, HeapObject::kMapOffset), Factory::heap_number_map()); |
| 3107 | __ j(equal, &load_float_eax); |
| 3108 | __ jmp(not_numbers); // Argument in eax is not a number. |
| 3109 | __ bind(&load_smi_edx); |
| 3110 | __ SmiUntag(edx); // Untag smi before converting to float. |
| 3111 | __ cvtsi2sd(xmm0, Operand(edx)); |
| 3112 | __ SmiTag(edx); // Retag smi for heap number overwriting test. |
| 3113 | __ jmp(&load_eax); |
| 3114 | __ bind(&load_smi_eax); |
| 3115 | __ SmiUntag(eax); // Untag smi before converting to float. |
| 3116 | __ cvtsi2sd(xmm1, Operand(eax)); |
| 3117 | __ SmiTag(eax); // Retag smi for heap number overwriting test. |
| 3118 | __ jmp(&done); |
| 3119 | __ bind(&load_float_eax); |
| 3120 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 3121 | __ bind(&done); |
| 3122 | } |
| 3123 | |
| 3124 | |
| 3125 | void FloatingPointHelper::LoadSSE2Smis(MacroAssembler* masm, |
| 3126 | Register scratch) { |
| 3127 | const Register left = edx; |
| 3128 | const Register right = eax; |
| 3129 | __ mov(scratch, left); |
| 3130 | ASSERT(!scratch.is(right)); // We're about to clobber scratch. |
| 3131 | __ SmiUntag(scratch); |
| 3132 | __ cvtsi2sd(xmm0, Operand(scratch)); |
| 3133 | |
| 3134 | __ mov(scratch, right); |
| 3135 | __ SmiUntag(scratch); |
| 3136 | __ cvtsi2sd(xmm1, Operand(scratch)); |
| 3137 | } |
| 3138 | |
| 3139 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3140 | void FloatingPointHelper::CheckSSE2OperandsAreInt32(MacroAssembler* masm, |
| 3141 | Label* non_int32, |
| 3142 | Register scratch) { |
| 3143 | __ cvttsd2si(scratch, Operand(xmm0)); |
| 3144 | __ cvtsi2sd(xmm2, Operand(scratch)); |
| 3145 | __ ucomisd(xmm0, xmm2); |
| 3146 | __ j(not_zero, non_int32); |
| 3147 | __ j(carry, non_int32); |
| 3148 | __ cvttsd2si(scratch, Operand(xmm1)); |
| 3149 | __ cvtsi2sd(xmm2, Operand(scratch)); |
| 3150 | __ ucomisd(xmm1, xmm2); |
| 3151 | __ j(not_zero, non_int32); |
| 3152 | __ j(carry, non_int32); |
| 3153 | } |
| 3154 | |
| 3155 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3156 | void FloatingPointHelper::LoadFloatOperands(MacroAssembler* masm, |
| 3157 | Register scratch, |
| 3158 | ArgLocation arg_location) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3159 | NearLabel load_smi_1, load_smi_2, done_load_1, done; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3160 | if (arg_location == ARGS_IN_REGISTERS) { |
| 3161 | __ mov(scratch, edx); |
| 3162 | } else { |
| 3163 | __ mov(scratch, Operand(esp, 2 * kPointerSize)); |
| 3164 | } |
| 3165 | __ test(scratch, Immediate(kSmiTagMask)); |
| 3166 | __ j(zero, &load_smi_1, not_taken); |
| 3167 | __ fld_d(FieldOperand(scratch, HeapNumber::kValueOffset)); |
| 3168 | __ bind(&done_load_1); |
| 3169 | |
| 3170 | if (arg_location == ARGS_IN_REGISTERS) { |
| 3171 | __ mov(scratch, eax); |
| 3172 | } else { |
| 3173 | __ mov(scratch, Operand(esp, 1 * kPointerSize)); |
| 3174 | } |
| 3175 | __ test(scratch, Immediate(kSmiTagMask)); |
| 3176 | __ j(zero, &load_smi_2, not_taken); |
| 3177 | __ fld_d(FieldOperand(scratch, HeapNumber::kValueOffset)); |
| 3178 | __ jmp(&done); |
| 3179 | |
| 3180 | __ bind(&load_smi_1); |
| 3181 | __ SmiUntag(scratch); |
| 3182 | __ push(scratch); |
| 3183 | __ fild_s(Operand(esp, 0)); |
| 3184 | __ pop(scratch); |
| 3185 | __ jmp(&done_load_1); |
| 3186 | |
| 3187 | __ bind(&load_smi_2); |
| 3188 | __ SmiUntag(scratch); |
| 3189 | __ push(scratch); |
| 3190 | __ fild_s(Operand(esp, 0)); |
| 3191 | __ pop(scratch); |
| 3192 | |
| 3193 | __ bind(&done); |
| 3194 | } |
| 3195 | |
| 3196 | |
| 3197 | void FloatingPointHelper::LoadFloatSmis(MacroAssembler* masm, |
| 3198 | Register scratch) { |
| 3199 | const Register left = edx; |
| 3200 | const Register right = eax; |
| 3201 | __ mov(scratch, left); |
| 3202 | ASSERT(!scratch.is(right)); // We're about to clobber scratch. |
| 3203 | __ SmiUntag(scratch); |
| 3204 | __ push(scratch); |
| 3205 | __ fild_s(Operand(esp, 0)); |
| 3206 | |
| 3207 | __ mov(scratch, right); |
| 3208 | __ SmiUntag(scratch); |
| 3209 | __ mov(Operand(esp, 0), scratch); |
| 3210 | __ fild_s(Operand(esp, 0)); |
| 3211 | __ pop(scratch); |
| 3212 | } |
| 3213 | |
| 3214 | |
| 3215 | void FloatingPointHelper::CheckFloatOperands(MacroAssembler* masm, |
| 3216 | Label* non_float, |
| 3217 | Register scratch) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3218 | NearLabel test_other, done; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3219 | // Test if both operands are floats or smi -> scratch=k_is_float; |
| 3220 | // Otherwise scratch = k_not_float. |
| 3221 | __ test(edx, Immediate(kSmiTagMask)); |
| 3222 | __ j(zero, &test_other, not_taken); // argument in edx is OK |
| 3223 | __ mov(scratch, FieldOperand(edx, HeapObject::kMapOffset)); |
| 3224 | __ cmp(scratch, Factory::heap_number_map()); |
| 3225 | __ j(not_equal, non_float); // argument in edx is not a number -> NaN |
| 3226 | |
| 3227 | __ bind(&test_other); |
| 3228 | __ test(eax, Immediate(kSmiTagMask)); |
| 3229 | __ j(zero, &done); // argument in eax is OK |
| 3230 | __ mov(scratch, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3231 | __ cmp(scratch, Factory::heap_number_map()); |
| 3232 | __ j(not_equal, non_float); // argument in eax is not a number -> NaN |
| 3233 | |
| 3234 | // Fall-through: Both operands are numbers. |
| 3235 | __ bind(&done); |
| 3236 | } |
| 3237 | |
| 3238 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3239 | void FloatingPointHelper::CheckFloatOperandsAreInt32(MacroAssembler* masm, |
| 3240 | Label* non_int32) { |
| 3241 | return; |
| 3242 | } |
| 3243 | |
| 3244 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3245 | void GenericUnaryOpStub::Generate(MacroAssembler* masm) { |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 3246 | Label slow, done, undo; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3247 | |
| 3248 | if (op_ == Token::SUB) { |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 3249 | if (include_smi_code_) { |
| 3250 | // Check whether the value is a smi. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3251 | NearLabel try_float; |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 3252 | __ test(eax, Immediate(kSmiTagMask)); |
| 3253 | __ j(not_zero, &try_float, not_taken); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3254 | |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 3255 | if (negative_zero_ == kStrictNegativeZero) { |
| 3256 | // Go slow case if the value of the expression is zero |
| 3257 | // to make sure that we switch between 0 and -0. |
| 3258 | __ test(eax, Operand(eax)); |
| 3259 | __ j(zero, &slow, not_taken); |
| 3260 | } |
| 3261 | |
| 3262 | // The value of the expression is a smi that is not zero. Try |
| 3263 | // optimistic subtraction '0 - value'. |
| 3264 | __ mov(edx, Operand(eax)); |
| 3265 | __ Set(eax, Immediate(0)); |
| 3266 | __ sub(eax, Operand(edx)); |
| 3267 | __ j(overflow, &undo, not_taken); |
| 3268 | __ StubReturn(1); |
| 3269 | |
| 3270 | // Try floating point case. |
| 3271 | __ bind(&try_float); |
| 3272 | } else if (FLAG_debug_code) { |
| 3273 | __ AbortIfSmi(eax); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3274 | } |
| 3275 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3276 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3277 | __ cmp(edx, Factory::heap_number_map()); |
| 3278 | __ j(not_equal, &slow); |
| 3279 | if (overwrite_ == UNARY_OVERWRITE) { |
| 3280 | __ mov(edx, FieldOperand(eax, HeapNumber::kExponentOffset)); |
| 3281 | __ xor_(edx, HeapNumber::kSignMask); // Flip sign. |
| 3282 | __ mov(FieldOperand(eax, HeapNumber::kExponentOffset), edx); |
| 3283 | } else { |
| 3284 | __ mov(edx, Operand(eax)); |
| 3285 | // edx: operand |
| 3286 | __ AllocateHeapNumber(eax, ebx, ecx, &undo); |
| 3287 | // eax: allocated 'empty' number |
| 3288 | __ mov(ecx, FieldOperand(edx, HeapNumber::kExponentOffset)); |
| 3289 | __ xor_(ecx, HeapNumber::kSignMask); // Flip sign. |
| 3290 | __ mov(FieldOperand(eax, HeapNumber::kExponentOffset), ecx); |
| 3291 | __ mov(ecx, FieldOperand(edx, HeapNumber::kMantissaOffset)); |
| 3292 | __ mov(FieldOperand(eax, HeapNumber::kMantissaOffset), ecx); |
| 3293 | } |
| 3294 | } else if (op_ == Token::BIT_NOT) { |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 3295 | if (include_smi_code_) { |
| 3296 | Label non_smi; |
| 3297 | __ test(eax, Immediate(kSmiTagMask)); |
| 3298 | __ j(not_zero, &non_smi); |
| 3299 | __ not_(eax); |
| 3300 | __ and_(eax, ~kSmiTagMask); // Remove inverted smi-tag. |
| 3301 | __ ret(0); |
| 3302 | __ bind(&non_smi); |
| 3303 | } else if (FLAG_debug_code) { |
| 3304 | __ AbortIfSmi(eax); |
| 3305 | } |
| 3306 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3307 | // Check if the operand is a heap number. |
| 3308 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3309 | __ cmp(edx, Factory::heap_number_map()); |
| 3310 | __ j(not_equal, &slow, not_taken); |
| 3311 | |
| 3312 | // Convert the heap number in eax to an untagged integer in ecx. |
| 3313 | IntegerConvert(masm, |
| 3314 | eax, |
| 3315 | TypeInfo::Unknown(), |
| 3316 | CpuFeatures::IsSupported(SSE3), |
| 3317 | &slow); |
| 3318 | |
| 3319 | // Do the bitwise operation and check if the result fits in a smi. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3320 | NearLabel try_float; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3321 | __ not_(ecx); |
| 3322 | __ cmp(ecx, 0xc0000000); |
| 3323 | __ j(sign, &try_float, not_taken); |
| 3324 | |
| 3325 | // Tag the result as a smi and we're done. |
| 3326 | STATIC_ASSERT(kSmiTagSize == 1); |
| 3327 | __ lea(eax, Operand(ecx, times_2, kSmiTag)); |
| 3328 | __ jmp(&done); |
| 3329 | |
| 3330 | // Try to store the result in a heap number. |
| 3331 | __ bind(&try_float); |
| 3332 | if (overwrite_ == UNARY_NO_OVERWRITE) { |
| 3333 | // Allocate a fresh heap number, but don't overwrite eax until |
| 3334 | // we're sure we can do it without going through the slow case |
| 3335 | // that needs the value in eax. |
| 3336 | __ AllocateHeapNumber(ebx, edx, edi, &slow); |
| 3337 | __ mov(eax, Operand(ebx)); |
| 3338 | } |
| 3339 | if (CpuFeatures::IsSupported(SSE2)) { |
| 3340 | CpuFeatures::Scope use_sse2(SSE2); |
| 3341 | __ cvtsi2sd(xmm0, Operand(ecx)); |
| 3342 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 3343 | } else { |
| 3344 | __ push(ecx); |
| 3345 | __ fild_s(Operand(esp, 0)); |
| 3346 | __ pop(ecx); |
| 3347 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 3348 | } |
| 3349 | } else { |
| 3350 | UNIMPLEMENTED(); |
| 3351 | } |
| 3352 | |
| 3353 | // Return from the stub. |
| 3354 | __ bind(&done); |
| 3355 | __ StubReturn(1); |
| 3356 | |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 3357 | // Restore eax and go slow case. |
| 3358 | __ bind(&undo); |
| 3359 | __ mov(eax, Operand(edx)); |
| 3360 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3361 | // Handle the slow case by jumping to the JavaScript builtin. |
| 3362 | __ bind(&slow); |
| 3363 | __ pop(ecx); // pop return address. |
| 3364 | __ push(eax); |
| 3365 | __ push(ecx); // push return address |
| 3366 | switch (op_) { |
| 3367 | case Token::SUB: |
| 3368 | __ InvokeBuiltin(Builtins::UNARY_MINUS, JUMP_FUNCTION); |
| 3369 | break; |
| 3370 | case Token::BIT_NOT: |
| 3371 | __ InvokeBuiltin(Builtins::BIT_NOT, JUMP_FUNCTION); |
| 3372 | break; |
| 3373 | default: |
| 3374 | UNREACHABLE(); |
| 3375 | } |
| 3376 | } |
| 3377 | |
| 3378 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 3379 | void MathPowStub::Generate(MacroAssembler* masm) { |
| 3380 | // Registers are used as follows: |
| 3381 | // edx = base |
| 3382 | // eax = exponent |
| 3383 | // ecx = temporary, result |
| 3384 | |
| 3385 | CpuFeatures::Scope use_sse2(SSE2); |
| 3386 | Label allocate_return, call_runtime; |
| 3387 | |
| 3388 | // Load input parameters. |
| 3389 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 3390 | __ mov(eax, Operand(esp, 1 * kPointerSize)); |
| 3391 | |
| 3392 | // Save 1 in xmm3 - we need this several times later on. |
| 3393 | __ mov(ecx, Immediate(1)); |
| 3394 | __ cvtsi2sd(xmm3, Operand(ecx)); |
| 3395 | |
| 3396 | Label exponent_nonsmi; |
| 3397 | Label base_nonsmi; |
| 3398 | // If the exponent is a heap number go to that specific case. |
| 3399 | __ test(eax, Immediate(kSmiTagMask)); |
| 3400 | __ j(not_zero, &exponent_nonsmi); |
| 3401 | __ test(edx, Immediate(kSmiTagMask)); |
| 3402 | __ j(not_zero, &base_nonsmi); |
| 3403 | |
| 3404 | // Optimized version when both exponent and base is a smi. |
| 3405 | Label powi; |
| 3406 | __ SmiUntag(edx); |
| 3407 | __ cvtsi2sd(xmm0, Operand(edx)); |
| 3408 | __ jmp(&powi); |
| 3409 | // exponent is smi and base is a heapnumber. |
| 3410 | __ bind(&base_nonsmi); |
| 3411 | __ cmp(FieldOperand(edx, HeapObject::kMapOffset), |
| 3412 | Factory::heap_number_map()); |
| 3413 | __ j(not_equal, &call_runtime); |
| 3414 | |
| 3415 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 3416 | |
| 3417 | // Optimized version of pow if exponent is a smi. |
| 3418 | // xmm0 contains the base. |
| 3419 | __ bind(&powi); |
| 3420 | __ SmiUntag(eax); |
| 3421 | |
| 3422 | // Save exponent in base as we need to check if exponent is negative later. |
| 3423 | // We know that base and exponent are in different registers. |
| 3424 | __ mov(edx, eax); |
| 3425 | |
| 3426 | // Get absolute value of exponent. |
| 3427 | NearLabel no_neg; |
| 3428 | __ cmp(eax, 0); |
| 3429 | __ j(greater_equal, &no_neg); |
| 3430 | __ neg(eax); |
| 3431 | __ bind(&no_neg); |
| 3432 | |
| 3433 | // Load xmm1 with 1. |
| 3434 | __ movsd(xmm1, xmm3); |
| 3435 | NearLabel while_true; |
| 3436 | NearLabel no_multiply; |
| 3437 | |
| 3438 | __ bind(&while_true); |
| 3439 | __ shr(eax, 1); |
| 3440 | __ j(not_carry, &no_multiply); |
| 3441 | __ mulsd(xmm1, xmm0); |
| 3442 | __ bind(&no_multiply); |
| 3443 | __ test(eax, Operand(eax)); |
| 3444 | __ mulsd(xmm0, xmm0); |
| 3445 | __ j(not_zero, &while_true); |
| 3446 | |
| 3447 | // base has the original value of the exponent - if the exponent is |
| 3448 | // negative return 1/result. |
| 3449 | __ test(edx, Operand(edx)); |
| 3450 | __ j(positive, &allocate_return); |
| 3451 | // Special case if xmm1 has reached infinity. |
| 3452 | __ mov(ecx, Immediate(0x7FB00000)); |
| 3453 | __ movd(xmm0, Operand(ecx)); |
| 3454 | __ cvtss2sd(xmm0, xmm0); |
| 3455 | __ ucomisd(xmm0, xmm1); |
| 3456 | __ j(equal, &call_runtime); |
| 3457 | __ divsd(xmm3, xmm1); |
| 3458 | __ movsd(xmm1, xmm3); |
| 3459 | __ jmp(&allocate_return); |
| 3460 | |
| 3461 | // exponent (or both) is a heapnumber - no matter what we should now work |
| 3462 | // on doubles. |
| 3463 | __ bind(&exponent_nonsmi); |
| 3464 | __ cmp(FieldOperand(eax, HeapObject::kMapOffset), |
| 3465 | Factory::heap_number_map()); |
| 3466 | __ j(not_equal, &call_runtime); |
| 3467 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 3468 | // Test if exponent is nan. |
| 3469 | __ ucomisd(xmm1, xmm1); |
| 3470 | __ j(parity_even, &call_runtime); |
| 3471 | |
| 3472 | NearLabel base_not_smi; |
| 3473 | NearLabel handle_special_cases; |
| 3474 | __ test(edx, Immediate(kSmiTagMask)); |
| 3475 | __ j(not_zero, &base_not_smi); |
| 3476 | __ SmiUntag(edx); |
| 3477 | __ cvtsi2sd(xmm0, Operand(edx)); |
| 3478 | __ jmp(&handle_special_cases); |
| 3479 | |
| 3480 | __ bind(&base_not_smi); |
| 3481 | __ cmp(FieldOperand(edx, HeapObject::kMapOffset), |
| 3482 | Factory::heap_number_map()); |
| 3483 | __ j(not_equal, &call_runtime); |
| 3484 | __ mov(ecx, FieldOperand(edx, HeapNumber::kExponentOffset)); |
| 3485 | __ and_(ecx, HeapNumber::kExponentMask); |
| 3486 | __ cmp(Operand(ecx), Immediate(HeapNumber::kExponentMask)); |
| 3487 | // base is NaN or +/-Infinity |
| 3488 | __ j(greater_equal, &call_runtime); |
| 3489 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 3490 | |
| 3491 | // base is in xmm0 and exponent is in xmm1. |
| 3492 | __ bind(&handle_special_cases); |
| 3493 | NearLabel not_minus_half; |
| 3494 | // Test for -0.5. |
| 3495 | // Load xmm2 with -0.5. |
| 3496 | __ mov(ecx, Immediate(0xBF000000)); |
| 3497 | __ movd(xmm2, Operand(ecx)); |
| 3498 | __ cvtss2sd(xmm2, xmm2); |
| 3499 | // xmm2 now has -0.5. |
| 3500 | __ ucomisd(xmm2, xmm1); |
| 3501 | __ j(not_equal, ¬_minus_half); |
| 3502 | |
| 3503 | // Calculates reciprocal of square root. |
| 3504 | // Note that 1/sqrt(x) = sqrt(1/x)) |
| 3505 | __ divsd(xmm3, xmm0); |
| 3506 | __ movsd(xmm1, xmm3); |
| 3507 | __ sqrtsd(xmm1, xmm1); |
| 3508 | __ jmp(&allocate_return); |
| 3509 | |
| 3510 | // Test for 0.5. |
| 3511 | __ bind(¬_minus_half); |
| 3512 | // Load xmm2 with 0.5. |
| 3513 | // Since xmm3 is 1 and xmm2 is -0.5 this is simply xmm2 + xmm3. |
| 3514 | __ addsd(xmm2, xmm3); |
| 3515 | // xmm2 now has 0.5. |
| 3516 | __ ucomisd(xmm2, xmm1); |
| 3517 | __ j(not_equal, &call_runtime); |
| 3518 | // Calculates square root. |
| 3519 | __ movsd(xmm1, xmm0); |
| 3520 | __ sqrtsd(xmm1, xmm1); |
| 3521 | |
| 3522 | __ bind(&allocate_return); |
| 3523 | __ AllocateHeapNumber(ecx, eax, edx, &call_runtime); |
| 3524 | __ movdbl(FieldOperand(ecx, HeapNumber::kValueOffset), xmm1); |
| 3525 | __ mov(eax, ecx); |
| 3526 | __ ret(2); |
| 3527 | |
| 3528 | __ bind(&call_runtime); |
| 3529 | __ TailCallRuntime(Runtime::kMath_pow_cfunction, 2, 1); |
| 3530 | } |
| 3531 | |
| 3532 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3533 | void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) { |
| 3534 | // The key is in edx and the parameter count is in eax. |
| 3535 | |
| 3536 | // The displacement is used for skipping the frame pointer on the |
| 3537 | // stack. It is the offset of the last parameter (if any) relative |
| 3538 | // to the frame pointer. |
| 3539 | static const int kDisplacement = 1 * kPointerSize; |
| 3540 | |
| 3541 | // Check that the key is a smi. |
| 3542 | Label slow; |
| 3543 | __ test(edx, Immediate(kSmiTagMask)); |
| 3544 | __ j(not_zero, &slow, not_taken); |
| 3545 | |
| 3546 | // Check if the calling frame is an arguments adaptor frame. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3547 | NearLabel adaptor; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3548 | __ mov(ebx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 3549 | __ mov(ecx, Operand(ebx, StandardFrameConstants::kContextOffset)); |
| 3550 | __ cmp(Operand(ecx), Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 3551 | __ j(equal, &adaptor); |
| 3552 | |
| 3553 | // Check index against formal parameters count limit passed in |
| 3554 | // through register eax. Use unsigned comparison to get negative |
| 3555 | // check for free. |
| 3556 | __ cmp(edx, Operand(eax)); |
| 3557 | __ j(above_equal, &slow, not_taken); |
| 3558 | |
| 3559 | // Read the argument from the stack and return it. |
| 3560 | STATIC_ASSERT(kSmiTagSize == 1); |
| 3561 | STATIC_ASSERT(kSmiTag == 0); // Shifting code depends on these. |
| 3562 | __ lea(ebx, Operand(ebp, eax, times_2, 0)); |
| 3563 | __ neg(edx); |
| 3564 | __ mov(eax, Operand(ebx, edx, times_2, kDisplacement)); |
| 3565 | __ ret(0); |
| 3566 | |
| 3567 | // Arguments adaptor case: Check index against actual arguments |
| 3568 | // limit found in the arguments adaptor frame. Use unsigned |
| 3569 | // comparison to get negative check for free. |
| 3570 | __ bind(&adaptor); |
| 3571 | __ mov(ecx, Operand(ebx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 3572 | __ cmp(edx, Operand(ecx)); |
| 3573 | __ j(above_equal, &slow, not_taken); |
| 3574 | |
| 3575 | // Read the argument from the stack and return it. |
| 3576 | STATIC_ASSERT(kSmiTagSize == 1); |
| 3577 | STATIC_ASSERT(kSmiTag == 0); // Shifting code depends on these. |
| 3578 | __ lea(ebx, Operand(ebx, ecx, times_2, 0)); |
| 3579 | __ neg(edx); |
| 3580 | __ mov(eax, Operand(ebx, edx, times_2, kDisplacement)); |
| 3581 | __ ret(0); |
| 3582 | |
| 3583 | // Slow-case: Handle non-smi or out-of-bounds access to arguments |
| 3584 | // by calling the runtime system. |
| 3585 | __ bind(&slow); |
| 3586 | __ pop(ebx); // Return address. |
| 3587 | __ push(edx); |
| 3588 | __ push(ebx); |
| 3589 | __ TailCallRuntime(Runtime::kGetArgumentsProperty, 1, 1); |
| 3590 | } |
| 3591 | |
| 3592 | |
| 3593 | void ArgumentsAccessStub::GenerateNewObject(MacroAssembler* masm) { |
| 3594 | // esp[0] : return address |
| 3595 | // esp[4] : number of parameters |
| 3596 | // esp[8] : receiver displacement |
| 3597 | // esp[16] : function |
| 3598 | |
| 3599 | // The displacement is used for skipping the return address and the |
| 3600 | // frame pointer on the stack. It is the offset of the last |
| 3601 | // parameter (if any) relative to the frame pointer. |
| 3602 | static const int kDisplacement = 2 * kPointerSize; |
| 3603 | |
| 3604 | // Check if the calling frame is an arguments adaptor frame. |
| 3605 | Label adaptor_frame, try_allocate, runtime; |
| 3606 | __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 3607 | __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset)); |
| 3608 | __ cmp(Operand(ecx), Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 3609 | __ j(equal, &adaptor_frame); |
| 3610 | |
| 3611 | // Get the length from the frame. |
| 3612 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); |
| 3613 | __ jmp(&try_allocate); |
| 3614 | |
| 3615 | // Patch the arguments.length and the parameters pointer. |
| 3616 | __ bind(&adaptor_frame); |
| 3617 | __ mov(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 3618 | __ mov(Operand(esp, 1 * kPointerSize), ecx); |
| 3619 | __ lea(edx, Operand(edx, ecx, times_2, kDisplacement)); |
| 3620 | __ mov(Operand(esp, 2 * kPointerSize), edx); |
| 3621 | |
| 3622 | // Try the new space allocation. Start out with computing the size of |
| 3623 | // the arguments object and the elements array. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3624 | NearLabel add_arguments_object; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3625 | __ bind(&try_allocate); |
| 3626 | __ test(ecx, Operand(ecx)); |
| 3627 | __ j(zero, &add_arguments_object); |
| 3628 | __ lea(ecx, Operand(ecx, times_2, FixedArray::kHeaderSize)); |
| 3629 | __ bind(&add_arguments_object); |
| 3630 | __ add(Operand(ecx), Immediate(Heap::kArgumentsObjectSize)); |
| 3631 | |
| 3632 | // Do the allocation of both objects in one go. |
| 3633 | __ AllocateInNewSpace(ecx, eax, edx, ebx, &runtime, TAG_OBJECT); |
| 3634 | |
| 3635 | // Get the arguments boilerplate from the current (global) context. |
| 3636 | int offset = Context::SlotOffset(Context::ARGUMENTS_BOILERPLATE_INDEX); |
| 3637 | __ mov(edi, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 3638 | __ mov(edi, FieldOperand(edi, GlobalObject::kGlobalContextOffset)); |
| 3639 | __ mov(edi, Operand(edi, offset)); |
| 3640 | |
| 3641 | // Copy the JS object part. |
| 3642 | for (int i = 0; i < JSObject::kHeaderSize; i += kPointerSize) { |
| 3643 | __ mov(ebx, FieldOperand(edi, i)); |
| 3644 | __ mov(FieldOperand(eax, i), ebx); |
| 3645 | } |
| 3646 | |
| 3647 | // Setup the callee in-object property. |
| 3648 | STATIC_ASSERT(Heap::arguments_callee_index == 0); |
| 3649 | __ mov(ebx, Operand(esp, 3 * kPointerSize)); |
| 3650 | __ mov(FieldOperand(eax, JSObject::kHeaderSize), ebx); |
| 3651 | |
| 3652 | // Get the length (smi tagged) and set that as an in-object property too. |
| 3653 | STATIC_ASSERT(Heap::arguments_length_index == 1); |
| 3654 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); |
| 3655 | __ mov(FieldOperand(eax, JSObject::kHeaderSize + kPointerSize), ecx); |
| 3656 | |
| 3657 | // If there are no actual arguments, we're done. |
| 3658 | Label done; |
| 3659 | __ test(ecx, Operand(ecx)); |
| 3660 | __ j(zero, &done); |
| 3661 | |
| 3662 | // Get the parameters pointer from the stack. |
| 3663 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 3664 | |
| 3665 | // Setup the elements pointer in the allocated arguments object and |
| 3666 | // initialize the header in the elements fixed array. |
| 3667 | __ lea(edi, Operand(eax, Heap::kArgumentsObjectSize)); |
| 3668 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), edi); |
| 3669 | __ mov(FieldOperand(edi, FixedArray::kMapOffset), |
| 3670 | Immediate(Factory::fixed_array_map())); |
| 3671 | __ mov(FieldOperand(edi, FixedArray::kLengthOffset), ecx); |
| 3672 | // Untag the length for the loop below. |
| 3673 | __ SmiUntag(ecx); |
| 3674 | |
| 3675 | // Copy the fixed array slots. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3676 | NearLabel loop; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3677 | __ bind(&loop); |
| 3678 | __ mov(ebx, Operand(edx, -1 * kPointerSize)); // Skip receiver. |
| 3679 | __ mov(FieldOperand(edi, FixedArray::kHeaderSize), ebx); |
| 3680 | __ add(Operand(edi), Immediate(kPointerSize)); |
| 3681 | __ sub(Operand(edx), Immediate(kPointerSize)); |
| 3682 | __ dec(ecx); |
| 3683 | __ j(not_zero, &loop); |
| 3684 | |
| 3685 | // Return and remove the on-stack parameters. |
| 3686 | __ bind(&done); |
| 3687 | __ ret(3 * kPointerSize); |
| 3688 | |
| 3689 | // Do the runtime call to allocate the arguments object. |
| 3690 | __ bind(&runtime); |
| 3691 | __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); |
| 3692 | } |
| 3693 | |
| 3694 | |
| 3695 | void RegExpExecStub::Generate(MacroAssembler* masm) { |
| 3696 | // Just jump directly to runtime if native RegExp is not selected at compile |
| 3697 | // time or if regexp entry in generated code is turned off runtime switch or |
| 3698 | // at compilation. |
| 3699 | #ifdef V8_INTERPRETED_REGEXP |
| 3700 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 3701 | #else // V8_INTERPRETED_REGEXP |
| 3702 | if (!FLAG_regexp_entry_native) { |
| 3703 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 3704 | return; |
| 3705 | } |
| 3706 | |
| 3707 | // Stack frame on entry. |
| 3708 | // esp[0]: return address |
| 3709 | // esp[4]: last_match_info (expected JSArray) |
| 3710 | // esp[8]: previous index |
| 3711 | // esp[12]: subject string |
| 3712 | // esp[16]: JSRegExp object |
| 3713 | |
| 3714 | static const int kLastMatchInfoOffset = 1 * kPointerSize; |
| 3715 | static const int kPreviousIndexOffset = 2 * kPointerSize; |
| 3716 | static const int kSubjectOffset = 3 * kPointerSize; |
| 3717 | static const int kJSRegExpOffset = 4 * kPointerSize; |
| 3718 | |
| 3719 | Label runtime, invoke_regexp; |
| 3720 | |
| 3721 | // Ensure that a RegExp stack is allocated. |
| 3722 | ExternalReference address_of_regexp_stack_memory_address = |
| 3723 | ExternalReference::address_of_regexp_stack_memory_address(); |
| 3724 | ExternalReference address_of_regexp_stack_memory_size = |
| 3725 | ExternalReference::address_of_regexp_stack_memory_size(); |
| 3726 | __ mov(ebx, Operand::StaticVariable(address_of_regexp_stack_memory_size)); |
| 3727 | __ test(ebx, Operand(ebx)); |
| 3728 | __ j(zero, &runtime, not_taken); |
| 3729 | |
| 3730 | // Check that the first argument is a JSRegExp object. |
| 3731 | __ mov(eax, Operand(esp, kJSRegExpOffset)); |
| 3732 | STATIC_ASSERT(kSmiTag == 0); |
| 3733 | __ test(eax, Immediate(kSmiTagMask)); |
| 3734 | __ j(zero, &runtime); |
| 3735 | __ CmpObjectType(eax, JS_REGEXP_TYPE, ecx); |
| 3736 | __ j(not_equal, &runtime); |
| 3737 | // Check that the RegExp has been compiled (data contains a fixed array). |
| 3738 | __ mov(ecx, FieldOperand(eax, JSRegExp::kDataOffset)); |
| 3739 | if (FLAG_debug_code) { |
| 3740 | __ test(ecx, Immediate(kSmiTagMask)); |
| 3741 | __ Check(not_zero, "Unexpected type for RegExp data, FixedArray expected"); |
| 3742 | __ CmpObjectType(ecx, FIXED_ARRAY_TYPE, ebx); |
| 3743 | __ Check(equal, "Unexpected type for RegExp data, FixedArray expected"); |
| 3744 | } |
| 3745 | |
| 3746 | // ecx: RegExp data (FixedArray) |
| 3747 | // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| 3748 | __ mov(ebx, FieldOperand(ecx, JSRegExp::kDataTagOffset)); |
| 3749 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(JSRegExp::IRREGEXP))); |
| 3750 | __ j(not_equal, &runtime); |
| 3751 | |
| 3752 | // ecx: RegExp data (FixedArray) |
| 3753 | // Check that the number of captures fit in the static offsets vector buffer. |
| 3754 | __ mov(edx, FieldOperand(ecx, JSRegExp::kIrregexpCaptureCountOffset)); |
| 3755 | // Calculate number of capture registers (number_of_captures + 1) * 2. This |
| 3756 | // uses the asumption that smis are 2 * their untagged value. |
| 3757 | STATIC_ASSERT(kSmiTag == 0); |
| 3758 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 3759 | __ add(Operand(edx), Immediate(2)); // edx was a smi. |
| 3760 | // Check that the static offsets vector buffer is large enough. |
| 3761 | __ cmp(edx, OffsetsVector::kStaticOffsetsVectorSize); |
| 3762 | __ j(above, &runtime); |
| 3763 | |
| 3764 | // ecx: RegExp data (FixedArray) |
| 3765 | // edx: Number of capture registers |
| 3766 | // Check that the second argument is a string. |
| 3767 | __ mov(eax, Operand(esp, kSubjectOffset)); |
| 3768 | __ test(eax, Immediate(kSmiTagMask)); |
| 3769 | __ j(zero, &runtime); |
| 3770 | Condition is_string = masm->IsObjectStringType(eax, ebx, ebx); |
| 3771 | __ j(NegateCondition(is_string), &runtime); |
| 3772 | // Get the length of the string to ebx. |
| 3773 | __ mov(ebx, FieldOperand(eax, String::kLengthOffset)); |
| 3774 | |
| 3775 | // ebx: Length of subject string as a smi |
| 3776 | // ecx: RegExp data (FixedArray) |
| 3777 | // edx: Number of capture registers |
| 3778 | // Check that the third argument is a positive smi less than the subject |
| 3779 | // string length. A negative value will be greater (unsigned comparison). |
| 3780 | __ mov(eax, Operand(esp, kPreviousIndexOffset)); |
| 3781 | __ test(eax, Immediate(kSmiTagMask)); |
| 3782 | __ j(not_zero, &runtime); |
| 3783 | __ cmp(eax, Operand(ebx)); |
| 3784 | __ j(above_equal, &runtime); |
| 3785 | |
| 3786 | // ecx: RegExp data (FixedArray) |
| 3787 | // edx: Number of capture registers |
| 3788 | // Check that the fourth object is a JSArray object. |
| 3789 | __ mov(eax, Operand(esp, kLastMatchInfoOffset)); |
| 3790 | __ test(eax, Immediate(kSmiTagMask)); |
| 3791 | __ j(zero, &runtime); |
| 3792 | __ CmpObjectType(eax, JS_ARRAY_TYPE, ebx); |
| 3793 | __ j(not_equal, &runtime); |
| 3794 | // Check that the JSArray is in fast case. |
| 3795 | __ mov(ebx, FieldOperand(eax, JSArray::kElementsOffset)); |
| 3796 | __ mov(eax, FieldOperand(ebx, HeapObject::kMapOffset)); |
| 3797 | __ cmp(eax, Factory::fixed_array_map()); |
| 3798 | __ j(not_equal, &runtime); |
| 3799 | // Check that the last match info has space for the capture registers and the |
| 3800 | // additional information. |
| 3801 | __ mov(eax, FieldOperand(ebx, FixedArray::kLengthOffset)); |
| 3802 | __ SmiUntag(eax); |
| 3803 | __ add(Operand(edx), Immediate(RegExpImpl::kLastMatchOverhead)); |
| 3804 | __ cmp(edx, Operand(eax)); |
| 3805 | __ j(greater, &runtime); |
| 3806 | |
| 3807 | // ecx: RegExp data (FixedArray) |
| 3808 | // Check the representation and encoding of the subject string. |
| 3809 | Label seq_ascii_string, seq_two_byte_string, check_code; |
| 3810 | __ mov(eax, Operand(esp, kSubjectOffset)); |
| 3811 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3812 | __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| 3813 | // First check for flat two byte string. |
| 3814 | __ and_(ebx, |
| 3815 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask); |
| 3816 | STATIC_ASSERT((kStringTag | kSeqStringTag | kTwoByteStringTag) == 0); |
| 3817 | __ j(zero, &seq_two_byte_string); |
| 3818 | // Any other flat string must be a flat ascii string. |
| 3819 | __ test(Operand(ebx), |
| 3820 | Immediate(kIsNotStringMask | kStringRepresentationMask)); |
| 3821 | __ j(zero, &seq_ascii_string); |
| 3822 | |
| 3823 | // Check for flat cons string. |
| 3824 | // A flat cons string is a cons string where the second part is the empty |
| 3825 | // string. In that case the subject string is just the first part of the cons |
| 3826 | // string. Also in this case the first part of the cons string is known to be |
| 3827 | // a sequential string or an external string. |
| 3828 | STATIC_ASSERT(kExternalStringTag != 0); |
| 3829 | STATIC_ASSERT((kConsStringTag & kExternalStringTag) == 0); |
| 3830 | __ test(Operand(ebx), |
| 3831 | Immediate(kIsNotStringMask | kExternalStringTag)); |
| 3832 | __ j(not_zero, &runtime); |
| 3833 | // String is a cons string. |
| 3834 | __ mov(edx, FieldOperand(eax, ConsString::kSecondOffset)); |
| 3835 | __ cmp(Operand(edx), Factory::empty_string()); |
| 3836 | __ j(not_equal, &runtime); |
| 3837 | __ mov(eax, FieldOperand(eax, ConsString::kFirstOffset)); |
| 3838 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3839 | // String is a cons string with empty second part. |
| 3840 | // eax: first part of cons string. |
| 3841 | // ebx: map of first part of cons string. |
| 3842 | // Is first part a flat two byte string? |
| 3843 | __ test_b(FieldOperand(ebx, Map::kInstanceTypeOffset), |
| 3844 | kStringRepresentationMask | kStringEncodingMask); |
| 3845 | STATIC_ASSERT((kSeqStringTag | kTwoByteStringTag) == 0); |
| 3846 | __ j(zero, &seq_two_byte_string); |
| 3847 | // Any other flat string must be ascii. |
| 3848 | __ test_b(FieldOperand(ebx, Map::kInstanceTypeOffset), |
| 3849 | kStringRepresentationMask); |
| 3850 | __ j(not_zero, &runtime); |
| 3851 | |
| 3852 | __ bind(&seq_ascii_string); |
| 3853 | // eax: subject string (flat ascii) |
| 3854 | // ecx: RegExp data (FixedArray) |
| 3855 | __ mov(edx, FieldOperand(ecx, JSRegExp::kDataAsciiCodeOffset)); |
| 3856 | __ Set(edi, Immediate(1)); // Type is ascii. |
| 3857 | __ jmp(&check_code); |
| 3858 | |
| 3859 | __ bind(&seq_two_byte_string); |
| 3860 | // eax: subject string (flat two byte) |
| 3861 | // ecx: RegExp data (FixedArray) |
| 3862 | __ mov(edx, FieldOperand(ecx, JSRegExp::kDataUC16CodeOffset)); |
| 3863 | __ Set(edi, Immediate(0)); // Type is two byte. |
| 3864 | |
| 3865 | __ bind(&check_code); |
| 3866 | // Check that the irregexp code has been generated for the actual string |
| 3867 | // encoding. If it has, the field contains a code object otherwise it contains |
| 3868 | // the hole. |
| 3869 | __ CmpObjectType(edx, CODE_TYPE, ebx); |
| 3870 | __ j(not_equal, &runtime); |
| 3871 | |
| 3872 | // eax: subject string |
| 3873 | // edx: code |
| 3874 | // edi: encoding of subject string (1 if ascii, 0 if two_byte); |
| 3875 | // Load used arguments before starting to push arguments for call to native |
| 3876 | // RegExp code to avoid handling changing stack height. |
| 3877 | __ mov(ebx, Operand(esp, kPreviousIndexOffset)); |
| 3878 | __ SmiUntag(ebx); // Previous index from smi. |
| 3879 | |
| 3880 | // eax: subject string |
| 3881 | // ebx: previous index |
| 3882 | // edx: code |
| 3883 | // edi: encoding of subject string (1 if ascii 0 if two_byte); |
| 3884 | // All checks done. Now push arguments for native regexp code. |
| 3885 | __ IncrementCounter(&Counters::regexp_entry_native, 1); |
| 3886 | |
| 3887 | static const int kRegExpExecuteArguments = 7; |
| 3888 | __ PrepareCallCFunction(kRegExpExecuteArguments, ecx); |
| 3889 | |
| 3890 | // Argument 7: Indicate that this is a direct call from JavaScript. |
| 3891 | __ mov(Operand(esp, 6 * kPointerSize), Immediate(1)); |
| 3892 | |
| 3893 | // Argument 6: Start (high end) of backtracking stack memory area. |
| 3894 | __ mov(ecx, Operand::StaticVariable(address_of_regexp_stack_memory_address)); |
| 3895 | __ add(ecx, Operand::StaticVariable(address_of_regexp_stack_memory_size)); |
| 3896 | __ mov(Operand(esp, 5 * kPointerSize), ecx); |
| 3897 | |
| 3898 | // Argument 5: static offsets vector buffer. |
| 3899 | __ mov(Operand(esp, 4 * kPointerSize), |
| 3900 | Immediate(ExternalReference::address_of_static_offsets_vector())); |
| 3901 | |
| 3902 | // Argument 4: End of string data |
| 3903 | // Argument 3: Start of string data |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3904 | NearLabel setup_two_byte, setup_rest; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3905 | __ test(edi, Operand(edi)); |
| 3906 | __ mov(edi, FieldOperand(eax, String::kLengthOffset)); |
| 3907 | __ j(zero, &setup_two_byte); |
| 3908 | __ SmiUntag(edi); |
| 3909 | __ lea(ecx, FieldOperand(eax, edi, times_1, SeqAsciiString::kHeaderSize)); |
| 3910 | __ mov(Operand(esp, 3 * kPointerSize), ecx); // Argument 4. |
| 3911 | __ lea(ecx, FieldOperand(eax, ebx, times_1, SeqAsciiString::kHeaderSize)); |
| 3912 | __ mov(Operand(esp, 2 * kPointerSize), ecx); // Argument 3. |
| 3913 | __ jmp(&setup_rest); |
| 3914 | |
| 3915 | __ bind(&setup_two_byte); |
| 3916 | STATIC_ASSERT(kSmiTag == 0); |
| 3917 | STATIC_ASSERT(kSmiTagSize == 1); // edi is smi (powered by 2). |
| 3918 | __ lea(ecx, FieldOperand(eax, edi, times_1, SeqTwoByteString::kHeaderSize)); |
| 3919 | __ mov(Operand(esp, 3 * kPointerSize), ecx); // Argument 4. |
| 3920 | __ lea(ecx, FieldOperand(eax, ebx, times_2, SeqTwoByteString::kHeaderSize)); |
| 3921 | __ mov(Operand(esp, 2 * kPointerSize), ecx); // Argument 3. |
| 3922 | |
| 3923 | __ bind(&setup_rest); |
| 3924 | |
| 3925 | // Argument 2: Previous index. |
| 3926 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
| 3927 | |
| 3928 | // Argument 1: Subject string. |
| 3929 | __ mov(Operand(esp, 0 * kPointerSize), eax); |
| 3930 | |
| 3931 | // Locate the code entry and call it. |
| 3932 | __ add(Operand(edx), Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 3933 | __ CallCFunction(edx, kRegExpExecuteArguments); |
| 3934 | |
| 3935 | // Check the result. |
| 3936 | Label success; |
| 3937 | __ cmp(eax, NativeRegExpMacroAssembler::SUCCESS); |
| 3938 | __ j(equal, &success, taken); |
| 3939 | Label failure; |
| 3940 | __ cmp(eax, NativeRegExpMacroAssembler::FAILURE); |
| 3941 | __ j(equal, &failure, taken); |
| 3942 | __ cmp(eax, NativeRegExpMacroAssembler::EXCEPTION); |
| 3943 | // If not exception it can only be retry. Handle that in the runtime system. |
| 3944 | __ j(not_equal, &runtime); |
| 3945 | // Result must now be exception. If there is no pending exception already a |
| 3946 | // stack overflow (on the backtrack stack) was detected in RegExp code but |
| 3947 | // haven't created the exception yet. Handle that in the runtime system. |
| 3948 | // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
| 3949 | ExternalReference pending_exception(Top::k_pending_exception_address); |
| 3950 | __ mov(eax, |
| 3951 | Operand::StaticVariable(ExternalReference::the_hole_value_location())); |
| 3952 | __ cmp(eax, Operand::StaticVariable(pending_exception)); |
| 3953 | __ j(equal, &runtime); |
| 3954 | __ bind(&failure); |
| 3955 | // For failure and exception return null. |
| 3956 | __ mov(Operand(eax), Factory::null_value()); |
| 3957 | __ ret(4 * kPointerSize); |
| 3958 | |
| 3959 | // Load RegExp data. |
| 3960 | __ bind(&success); |
| 3961 | __ mov(eax, Operand(esp, kJSRegExpOffset)); |
| 3962 | __ mov(ecx, FieldOperand(eax, JSRegExp::kDataOffset)); |
| 3963 | __ mov(edx, FieldOperand(ecx, JSRegExp::kIrregexpCaptureCountOffset)); |
| 3964 | // Calculate number of capture registers (number_of_captures + 1) * 2. |
| 3965 | STATIC_ASSERT(kSmiTag == 0); |
| 3966 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 3967 | __ add(Operand(edx), Immediate(2)); // edx was a smi. |
| 3968 | |
| 3969 | // edx: Number of capture registers |
| 3970 | // Load last_match_info which is still known to be a fast case JSArray. |
| 3971 | __ mov(eax, Operand(esp, kLastMatchInfoOffset)); |
| 3972 | __ mov(ebx, FieldOperand(eax, JSArray::kElementsOffset)); |
| 3973 | |
| 3974 | // ebx: last_match_info backing store (FixedArray) |
| 3975 | // edx: number of capture registers |
| 3976 | // Store the capture count. |
| 3977 | __ SmiTag(edx); // Number of capture registers to smi. |
| 3978 | __ mov(FieldOperand(ebx, RegExpImpl::kLastCaptureCountOffset), edx); |
| 3979 | __ SmiUntag(edx); // Number of capture registers back from smi. |
| 3980 | // Store last subject and last input. |
| 3981 | __ mov(eax, Operand(esp, kSubjectOffset)); |
| 3982 | __ mov(FieldOperand(ebx, RegExpImpl::kLastSubjectOffset), eax); |
| 3983 | __ mov(ecx, ebx); |
| 3984 | __ RecordWrite(ecx, RegExpImpl::kLastSubjectOffset, eax, edi); |
| 3985 | __ mov(eax, Operand(esp, kSubjectOffset)); |
| 3986 | __ mov(FieldOperand(ebx, RegExpImpl::kLastInputOffset), eax); |
| 3987 | __ mov(ecx, ebx); |
| 3988 | __ RecordWrite(ecx, RegExpImpl::kLastInputOffset, eax, edi); |
| 3989 | |
| 3990 | // Get the static offsets vector filled by the native regexp code. |
| 3991 | ExternalReference address_of_static_offsets_vector = |
| 3992 | ExternalReference::address_of_static_offsets_vector(); |
| 3993 | __ mov(ecx, Immediate(address_of_static_offsets_vector)); |
| 3994 | |
| 3995 | // ebx: last_match_info backing store (FixedArray) |
| 3996 | // ecx: offsets vector |
| 3997 | // edx: number of capture registers |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 3998 | NearLabel next_capture, done; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 3999 | // Capture register counter starts from number of capture registers and |
| 4000 | // counts down until wraping after zero. |
| 4001 | __ bind(&next_capture); |
| 4002 | __ sub(Operand(edx), Immediate(1)); |
| 4003 | __ j(negative, &done); |
| 4004 | // Read the value from the static offsets vector buffer. |
| 4005 | __ mov(edi, Operand(ecx, edx, times_int_size, 0)); |
| 4006 | __ SmiTag(edi); |
| 4007 | // Store the smi value in the last match info. |
| 4008 | __ mov(FieldOperand(ebx, |
| 4009 | edx, |
| 4010 | times_pointer_size, |
| 4011 | RegExpImpl::kFirstCaptureOffset), |
| 4012 | edi); |
| 4013 | __ jmp(&next_capture); |
| 4014 | __ bind(&done); |
| 4015 | |
| 4016 | // Return last match info. |
| 4017 | __ mov(eax, Operand(esp, kLastMatchInfoOffset)); |
| 4018 | __ ret(4 * kPointerSize); |
| 4019 | |
| 4020 | // Do the runtime call to execute the regexp. |
| 4021 | __ bind(&runtime); |
| 4022 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 4023 | #endif // V8_INTERPRETED_REGEXP |
| 4024 | } |
| 4025 | |
| 4026 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4027 | void RegExpConstructResultStub::Generate(MacroAssembler* masm) { |
| 4028 | const int kMaxInlineLength = 100; |
| 4029 | Label slowcase; |
| 4030 | NearLabel done; |
| 4031 | __ mov(ebx, Operand(esp, kPointerSize * 3)); |
| 4032 | __ test(ebx, Immediate(kSmiTagMask)); |
| 4033 | __ j(not_zero, &slowcase); |
| 4034 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(kMaxInlineLength))); |
| 4035 | __ j(above, &slowcase); |
| 4036 | // Smi-tagging is equivalent to multiplying by 2. |
| 4037 | STATIC_ASSERT(kSmiTag == 0); |
| 4038 | STATIC_ASSERT(kSmiTagSize == 1); |
| 4039 | // Allocate RegExpResult followed by FixedArray with size in ebx. |
| 4040 | // JSArray: [Map][empty properties][Elements][Length-smi][index][input] |
| 4041 | // Elements: [Map][Length][..elements..] |
| 4042 | __ AllocateInNewSpace(JSRegExpResult::kSize + FixedArray::kHeaderSize, |
| 4043 | times_half_pointer_size, |
| 4044 | ebx, // In: Number of elements (times 2, being a smi) |
| 4045 | eax, // Out: Start of allocation (tagged). |
| 4046 | ecx, // Out: End of allocation. |
| 4047 | edx, // Scratch register |
| 4048 | &slowcase, |
| 4049 | TAG_OBJECT); |
| 4050 | // eax: Start of allocated area, object-tagged. |
| 4051 | |
| 4052 | // Set JSArray map to global.regexp_result_map(). |
| 4053 | // Set empty properties FixedArray. |
| 4054 | // Set elements to point to FixedArray allocated right after the JSArray. |
| 4055 | // Interleave operations for better latency. |
| 4056 | __ mov(edx, ContextOperand(esi, Context::GLOBAL_INDEX)); |
| 4057 | __ mov(ecx, Immediate(Factory::empty_fixed_array())); |
| 4058 | __ lea(ebx, Operand(eax, JSRegExpResult::kSize)); |
| 4059 | __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalContextOffset)); |
| 4060 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), ebx); |
| 4061 | __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), ecx); |
| 4062 | __ mov(edx, ContextOperand(edx, Context::REGEXP_RESULT_MAP_INDEX)); |
| 4063 | __ mov(FieldOperand(eax, HeapObject::kMapOffset), edx); |
| 4064 | |
| 4065 | // Set input, index and length fields from arguments. |
| 4066 | __ mov(ecx, Operand(esp, kPointerSize * 1)); |
| 4067 | __ mov(FieldOperand(eax, JSRegExpResult::kInputOffset), ecx); |
| 4068 | __ mov(ecx, Operand(esp, kPointerSize * 2)); |
| 4069 | __ mov(FieldOperand(eax, JSRegExpResult::kIndexOffset), ecx); |
| 4070 | __ mov(ecx, Operand(esp, kPointerSize * 3)); |
| 4071 | __ mov(FieldOperand(eax, JSArray::kLengthOffset), ecx); |
| 4072 | |
| 4073 | // Fill out the elements FixedArray. |
| 4074 | // eax: JSArray. |
| 4075 | // ebx: FixedArray. |
| 4076 | // ecx: Number of elements in array, as smi. |
| 4077 | |
| 4078 | // Set map. |
| 4079 | __ mov(FieldOperand(ebx, HeapObject::kMapOffset), |
| 4080 | Immediate(Factory::fixed_array_map())); |
| 4081 | // Set length. |
| 4082 | __ mov(FieldOperand(ebx, FixedArray::kLengthOffset), ecx); |
| 4083 | // Fill contents of fixed-array with the-hole. |
| 4084 | __ SmiUntag(ecx); |
| 4085 | __ mov(edx, Immediate(Factory::the_hole_value())); |
| 4086 | __ lea(ebx, FieldOperand(ebx, FixedArray::kHeaderSize)); |
| 4087 | // Fill fixed array elements with hole. |
| 4088 | // eax: JSArray. |
| 4089 | // ecx: Number of elements to fill. |
| 4090 | // ebx: Start of elements in FixedArray. |
| 4091 | // edx: the hole. |
| 4092 | Label loop; |
| 4093 | __ test(ecx, Operand(ecx)); |
| 4094 | __ bind(&loop); |
| 4095 | __ j(less_equal, &done); // Jump if ecx is negative or zero. |
| 4096 | __ sub(Operand(ecx), Immediate(1)); |
| 4097 | __ mov(Operand(ebx, ecx, times_pointer_size, 0), edx); |
| 4098 | __ jmp(&loop); |
| 4099 | |
| 4100 | __ bind(&done); |
| 4101 | __ ret(3 * kPointerSize); |
| 4102 | |
| 4103 | __ bind(&slowcase); |
| 4104 | __ TailCallRuntime(Runtime::kRegExpConstructResult, 3, 1); |
| 4105 | } |
| 4106 | |
| 4107 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4108 | void NumberToStringStub::GenerateLookupNumberStringCache(MacroAssembler* masm, |
| 4109 | Register object, |
| 4110 | Register result, |
| 4111 | Register scratch1, |
| 4112 | Register scratch2, |
| 4113 | bool object_is_smi, |
| 4114 | Label* not_found) { |
| 4115 | // Use of registers. Register result is used as a temporary. |
| 4116 | Register number_string_cache = result; |
| 4117 | Register mask = scratch1; |
| 4118 | Register scratch = scratch2; |
| 4119 | |
| 4120 | // Load the number string cache. |
| 4121 | ExternalReference roots_address = ExternalReference::roots_address(); |
| 4122 | __ mov(scratch, Immediate(Heap::kNumberStringCacheRootIndex)); |
| 4123 | __ mov(number_string_cache, |
| 4124 | Operand::StaticArray(scratch, times_pointer_size, roots_address)); |
| 4125 | // Make the hash mask from the length of the number string cache. It |
| 4126 | // contains two elements (number and string) for each cache entry. |
| 4127 | __ mov(mask, FieldOperand(number_string_cache, FixedArray::kLengthOffset)); |
| 4128 | __ shr(mask, kSmiTagSize + 1); // Untag length and divide it by two. |
| 4129 | __ sub(Operand(mask), Immediate(1)); // Make mask. |
| 4130 | |
| 4131 | // Calculate the entry in the number string cache. The hash value in the |
| 4132 | // number string cache for smis is just the smi value, and the hash for |
| 4133 | // doubles is the xor of the upper and lower words. See |
| 4134 | // Heap::GetNumberStringCache. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4135 | NearLabel smi_hash_calculated; |
| 4136 | NearLabel load_result_from_cache; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4137 | if (object_is_smi) { |
| 4138 | __ mov(scratch, object); |
| 4139 | __ SmiUntag(scratch); |
| 4140 | } else { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4141 | NearLabel not_smi, hash_calculated; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4142 | STATIC_ASSERT(kSmiTag == 0); |
| 4143 | __ test(object, Immediate(kSmiTagMask)); |
| 4144 | __ j(not_zero, ¬_smi); |
| 4145 | __ mov(scratch, object); |
| 4146 | __ SmiUntag(scratch); |
| 4147 | __ jmp(&smi_hash_calculated); |
| 4148 | __ bind(¬_smi); |
| 4149 | __ cmp(FieldOperand(object, HeapObject::kMapOffset), |
| 4150 | Factory::heap_number_map()); |
| 4151 | __ j(not_equal, not_found); |
| 4152 | STATIC_ASSERT(8 == kDoubleSize); |
| 4153 | __ mov(scratch, FieldOperand(object, HeapNumber::kValueOffset)); |
| 4154 | __ xor_(scratch, FieldOperand(object, HeapNumber::kValueOffset + 4)); |
| 4155 | // Object is heap number and hash is now in scratch. Calculate cache index. |
| 4156 | __ and_(scratch, Operand(mask)); |
| 4157 | Register index = scratch; |
| 4158 | Register probe = mask; |
| 4159 | __ mov(probe, |
| 4160 | FieldOperand(number_string_cache, |
| 4161 | index, |
| 4162 | times_twice_pointer_size, |
| 4163 | FixedArray::kHeaderSize)); |
| 4164 | __ test(probe, Immediate(kSmiTagMask)); |
| 4165 | __ j(zero, not_found); |
| 4166 | if (CpuFeatures::IsSupported(SSE2)) { |
| 4167 | CpuFeatures::Scope fscope(SSE2); |
| 4168 | __ movdbl(xmm0, FieldOperand(object, HeapNumber::kValueOffset)); |
| 4169 | __ movdbl(xmm1, FieldOperand(probe, HeapNumber::kValueOffset)); |
| 4170 | __ ucomisd(xmm0, xmm1); |
| 4171 | } else { |
| 4172 | __ fld_d(FieldOperand(object, HeapNumber::kValueOffset)); |
| 4173 | __ fld_d(FieldOperand(probe, HeapNumber::kValueOffset)); |
| 4174 | __ FCmp(); |
| 4175 | } |
| 4176 | __ j(parity_even, not_found); // Bail out if NaN is involved. |
| 4177 | __ j(not_equal, not_found); // The cache did not contain this value. |
| 4178 | __ jmp(&load_result_from_cache); |
| 4179 | } |
| 4180 | |
| 4181 | __ bind(&smi_hash_calculated); |
| 4182 | // Object is smi and hash is now in scratch. Calculate cache index. |
| 4183 | __ and_(scratch, Operand(mask)); |
| 4184 | Register index = scratch; |
| 4185 | // Check if the entry is the smi we are looking for. |
| 4186 | __ cmp(object, |
| 4187 | FieldOperand(number_string_cache, |
| 4188 | index, |
| 4189 | times_twice_pointer_size, |
| 4190 | FixedArray::kHeaderSize)); |
| 4191 | __ j(not_equal, not_found); |
| 4192 | |
| 4193 | // Get the result from the cache. |
| 4194 | __ bind(&load_result_from_cache); |
| 4195 | __ mov(result, |
| 4196 | FieldOperand(number_string_cache, |
| 4197 | index, |
| 4198 | times_twice_pointer_size, |
| 4199 | FixedArray::kHeaderSize + kPointerSize)); |
| 4200 | __ IncrementCounter(&Counters::number_to_string_native, 1); |
| 4201 | } |
| 4202 | |
| 4203 | |
| 4204 | void NumberToStringStub::Generate(MacroAssembler* masm) { |
| 4205 | Label runtime; |
| 4206 | |
| 4207 | __ mov(ebx, Operand(esp, kPointerSize)); |
| 4208 | |
| 4209 | // Generate code to lookup number in the number string cache. |
| 4210 | GenerateLookupNumberStringCache(masm, ebx, eax, ecx, edx, false, &runtime); |
| 4211 | __ ret(1 * kPointerSize); |
| 4212 | |
| 4213 | __ bind(&runtime); |
| 4214 | // Handle number to string in the runtime system if not found in the cache. |
| 4215 | __ TailCallRuntime(Runtime::kNumberToStringSkipCache, 1, 1); |
| 4216 | } |
| 4217 | |
| 4218 | |
| 4219 | static int NegativeComparisonResult(Condition cc) { |
| 4220 | ASSERT(cc != equal); |
| 4221 | ASSERT((cc == less) || (cc == less_equal) |
| 4222 | || (cc == greater) || (cc == greater_equal)); |
| 4223 | return (cc == greater || cc == greater_equal) ? LESS : GREATER; |
| 4224 | } |
| 4225 | |
| 4226 | void CompareStub::Generate(MacroAssembler* masm) { |
| 4227 | ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| 4228 | |
| 4229 | Label check_unequal_objects, done; |
| 4230 | |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 4231 | // Compare two smis if required. |
| 4232 | if (include_smi_compare_) { |
| 4233 | Label non_smi, smi_done; |
| 4234 | __ mov(ecx, Operand(edx)); |
| 4235 | __ or_(ecx, Operand(eax)); |
| 4236 | __ test(ecx, Immediate(kSmiTagMask)); |
| 4237 | __ j(not_zero, &non_smi, not_taken); |
| 4238 | __ sub(edx, Operand(eax)); // Return on the result of the subtraction. |
| 4239 | __ j(no_overflow, &smi_done); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 4240 | __ not_(edx); // Correct sign in case of overflow. edx is never 0 here. |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 4241 | __ bind(&smi_done); |
| 4242 | __ mov(eax, edx); |
| 4243 | __ ret(0); |
| 4244 | __ bind(&non_smi); |
| 4245 | } else if (FLAG_debug_code) { |
| 4246 | __ mov(ecx, Operand(edx)); |
| 4247 | __ or_(ecx, Operand(eax)); |
| 4248 | __ test(ecx, Immediate(kSmiTagMask)); |
| 4249 | __ Assert(not_zero, "Unexpected smi operands."); |
| 4250 | } |
| 4251 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4252 | // NOTICE! This code is only reached after a smi-fast-case check, so |
| 4253 | // it is certain that at least one operand isn't a smi. |
| 4254 | |
| 4255 | // Identical objects can be compared fast, but there are some tricky cases |
| 4256 | // for NaN and undefined. |
| 4257 | { |
| 4258 | Label not_identical; |
| 4259 | __ cmp(eax, Operand(edx)); |
| 4260 | __ j(not_equal, ¬_identical); |
| 4261 | |
| 4262 | if (cc_ != equal) { |
| 4263 | // Check for undefined. undefined OP undefined is false even though |
| 4264 | // undefined == undefined. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4265 | NearLabel check_for_nan; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4266 | __ cmp(edx, Factory::undefined_value()); |
| 4267 | __ j(not_equal, &check_for_nan); |
| 4268 | __ Set(eax, Immediate(Smi::FromInt(NegativeComparisonResult(cc_)))); |
| 4269 | __ ret(0); |
| 4270 | __ bind(&check_for_nan); |
| 4271 | } |
| 4272 | |
| 4273 | // Test for NaN. Sadly, we can't just compare to Factory::nan_value(), |
| 4274 | // so we do the second best thing - test it ourselves. |
| 4275 | // Note: if cc_ != equal, never_nan_nan_ is not used. |
| 4276 | if (never_nan_nan_ && (cc_ == equal)) { |
| 4277 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 4278 | __ ret(0); |
| 4279 | } else { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4280 | NearLabel heap_number; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4281 | __ cmp(FieldOperand(edx, HeapObject::kMapOffset), |
| 4282 | Immediate(Factory::heap_number_map())); |
| 4283 | __ j(equal, &heap_number); |
| 4284 | if (cc_ != equal) { |
| 4285 | // Call runtime on identical JSObjects. Otherwise return equal. |
| 4286 | __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, ecx); |
| 4287 | __ j(above_equal, ¬_identical); |
| 4288 | } |
| 4289 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 4290 | __ ret(0); |
| 4291 | |
| 4292 | __ bind(&heap_number); |
| 4293 | // It is a heap number, so return non-equal if it's NaN and equal if |
| 4294 | // it's not NaN. |
| 4295 | // The representation of NaN values has all exponent bits (52..62) set, |
| 4296 | // and not all mantissa bits (0..51) clear. |
| 4297 | // We only accept QNaNs, which have bit 51 set. |
| 4298 | // Read top bits of double representation (second word of value). |
| 4299 | |
| 4300 | // Value is a QNaN if value & kQuietNaNMask == kQuietNaNMask, i.e., |
| 4301 | // all bits in the mask are set. We only need to check the word |
| 4302 | // that contains the exponent and high bit of the mantissa. |
| 4303 | STATIC_ASSERT(((kQuietNaNHighBitsMask << 1) & 0x80000000u) != 0); |
| 4304 | __ mov(edx, FieldOperand(edx, HeapNumber::kExponentOffset)); |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 4305 | __ Set(eax, Immediate(0)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4306 | // Shift value and mask so kQuietNaNHighBitsMask applies to topmost |
| 4307 | // bits. |
| 4308 | __ add(edx, Operand(edx)); |
| 4309 | __ cmp(edx, kQuietNaNHighBitsMask << 1); |
| 4310 | if (cc_ == equal) { |
| 4311 | STATIC_ASSERT(EQUAL != 1); |
| 4312 | __ setcc(above_equal, eax); |
| 4313 | __ ret(0); |
| 4314 | } else { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4315 | NearLabel nan; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4316 | __ j(above_equal, &nan); |
| 4317 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 4318 | __ ret(0); |
| 4319 | __ bind(&nan); |
| 4320 | __ Set(eax, Immediate(Smi::FromInt(NegativeComparisonResult(cc_)))); |
| 4321 | __ ret(0); |
| 4322 | } |
| 4323 | } |
| 4324 | |
| 4325 | __ bind(¬_identical); |
| 4326 | } |
| 4327 | |
| 4328 | // Strict equality can quickly decide whether objects are equal. |
| 4329 | // Non-strict object equality is slower, so it is handled later in the stub. |
| 4330 | if (cc_ == equal && strict_) { |
| 4331 | Label slow; // Fallthrough label. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4332 | NearLabel not_smis; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4333 | // If we're doing a strict equality comparison, we don't have to do |
| 4334 | // type conversion, so we generate code to do fast comparison for objects |
| 4335 | // and oddballs. Non-smi numbers and strings still go through the usual |
| 4336 | // slow-case code. |
| 4337 | // If either is a Smi (we know that not both are), then they can only |
| 4338 | // be equal if the other is a HeapNumber. If so, use the slow case. |
| 4339 | STATIC_ASSERT(kSmiTag == 0); |
| 4340 | ASSERT_EQ(0, Smi::FromInt(0)); |
| 4341 | __ mov(ecx, Immediate(kSmiTagMask)); |
| 4342 | __ and_(ecx, Operand(eax)); |
| 4343 | __ test(ecx, Operand(edx)); |
| 4344 | __ j(not_zero, ¬_smis); |
| 4345 | // One operand is a smi. |
| 4346 | |
| 4347 | // Check whether the non-smi is a heap number. |
| 4348 | STATIC_ASSERT(kSmiTagMask == 1); |
| 4349 | // ecx still holds eax & kSmiTag, which is either zero or one. |
| 4350 | __ sub(Operand(ecx), Immediate(0x01)); |
| 4351 | __ mov(ebx, edx); |
| 4352 | __ xor_(ebx, Operand(eax)); |
| 4353 | __ and_(ebx, Operand(ecx)); // ebx holds either 0 or eax ^ edx. |
| 4354 | __ xor_(ebx, Operand(eax)); |
| 4355 | // if eax was smi, ebx is now edx, else eax. |
| 4356 | |
| 4357 | // Check if the non-smi operand is a heap number. |
| 4358 | __ cmp(FieldOperand(ebx, HeapObject::kMapOffset), |
| 4359 | Immediate(Factory::heap_number_map())); |
| 4360 | // If heap number, handle it in the slow case. |
| 4361 | __ j(equal, &slow); |
| 4362 | // Return non-equal (ebx is not zero) |
| 4363 | __ mov(eax, ebx); |
| 4364 | __ ret(0); |
| 4365 | |
| 4366 | __ bind(¬_smis); |
| 4367 | // If either operand is a JSObject or an oddball value, then they are not |
| 4368 | // equal since their pointers are different |
| 4369 | // There is no test for undetectability in strict equality. |
| 4370 | |
| 4371 | // Get the type of the first operand. |
| 4372 | // If the first object is a JS object, we have done pointer comparison. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4373 | NearLabel first_non_object; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4374 | STATIC_ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| 4375 | __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, ecx); |
| 4376 | __ j(below, &first_non_object); |
| 4377 | |
| 4378 | // Return non-zero (eax is not zero) |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4379 | NearLabel return_not_equal; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4380 | STATIC_ASSERT(kHeapObjectTag != 0); |
| 4381 | __ bind(&return_not_equal); |
| 4382 | __ ret(0); |
| 4383 | |
| 4384 | __ bind(&first_non_object); |
| 4385 | // Check for oddballs: true, false, null, undefined. |
| 4386 | __ CmpInstanceType(ecx, ODDBALL_TYPE); |
| 4387 | __ j(equal, &return_not_equal); |
| 4388 | |
| 4389 | __ CmpObjectType(edx, FIRST_JS_OBJECT_TYPE, ecx); |
| 4390 | __ j(above_equal, &return_not_equal); |
| 4391 | |
| 4392 | // Check for oddballs: true, false, null, undefined. |
| 4393 | __ CmpInstanceType(ecx, ODDBALL_TYPE); |
| 4394 | __ j(equal, &return_not_equal); |
| 4395 | |
| 4396 | // Fall through to the general case. |
| 4397 | __ bind(&slow); |
| 4398 | } |
| 4399 | |
| 4400 | // Generate the number comparison code. |
| 4401 | if (include_number_compare_) { |
| 4402 | Label non_number_comparison; |
| 4403 | Label unordered; |
| 4404 | if (CpuFeatures::IsSupported(SSE2)) { |
| 4405 | CpuFeatures::Scope use_sse2(SSE2); |
| 4406 | CpuFeatures::Scope use_cmov(CMOV); |
| 4407 | |
| 4408 | FloatingPointHelper::LoadSSE2Operands(masm, &non_number_comparison); |
| 4409 | __ ucomisd(xmm0, xmm1); |
| 4410 | |
| 4411 | // Don't base result on EFLAGS when a NaN is involved. |
| 4412 | __ j(parity_even, &unordered, not_taken); |
| 4413 | // Return a result of -1, 0, or 1, based on EFLAGS. |
| 4414 | __ mov(eax, 0); // equal |
| 4415 | __ mov(ecx, Immediate(Smi::FromInt(1))); |
| 4416 | __ cmov(above, eax, Operand(ecx)); |
| 4417 | __ mov(ecx, Immediate(Smi::FromInt(-1))); |
| 4418 | __ cmov(below, eax, Operand(ecx)); |
| 4419 | __ ret(0); |
| 4420 | } else { |
| 4421 | FloatingPointHelper::CheckFloatOperands( |
| 4422 | masm, &non_number_comparison, ebx); |
| 4423 | FloatingPointHelper::LoadFloatOperand(masm, eax); |
| 4424 | FloatingPointHelper::LoadFloatOperand(masm, edx); |
| 4425 | __ FCmp(); |
| 4426 | |
| 4427 | // Don't base result on EFLAGS when a NaN is involved. |
| 4428 | __ j(parity_even, &unordered, not_taken); |
| 4429 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4430 | NearLabel below_label, above_label; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4431 | // Return a result of -1, 0, or 1, based on EFLAGS. |
| 4432 | __ j(below, &below_label, not_taken); |
| 4433 | __ j(above, &above_label, not_taken); |
| 4434 | |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 4435 | __ Set(eax, Immediate(0)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4436 | __ ret(0); |
| 4437 | |
| 4438 | __ bind(&below_label); |
| 4439 | __ mov(eax, Immediate(Smi::FromInt(-1))); |
| 4440 | __ ret(0); |
| 4441 | |
| 4442 | __ bind(&above_label); |
| 4443 | __ mov(eax, Immediate(Smi::FromInt(1))); |
| 4444 | __ ret(0); |
| 4445 | } |
| 4446 | |
| 4447 | // If one of the numbers was NaN, then the result is always false. |
| 4448 | // The cc is never not-equal. |
| 4449 | __ bind(&unordered); |
| 4450 | ASSERT(cc_ != not_equal); |
| 4451 | if (cc_ == less || cc_ == less_equal) { |
| 4452 | __ mov(eax, Immediate(Smi::FromInt(1))); |
| 4453 | } else { |
| 4454 | __ mov(eax, Immediate(Smi::FromInt(-1))); |
| 4455 | } |
| 4456 | __ ret(0); |
| 4457 | |
| 4458 | // The number comparison code did not provide a valid result. |
| 4459 | __ bind(&non_number_comparison); |
| 4460 | } |
| 4461 | |
| 4462 | // Fast negative check for symbol-to-symbol equality. |
| 4463 | Label check_for_strings; |
| 4464 | if (cc_ == equal) { |
| 4465 | BranchIfNonSymbol(masm, &check_for_strings, eax, ecx); |
| 4466 | BranchIfNonSymbol(masm, &check_for_strings, edx, ecx); |
| 4467 | |
| 4468 | // We've already checked for object identity, so if both operands |
| 4469 | // are symbols they aren't equal. Register eax already holds a |
| 4470 | // non-zero value, which indicates not equal, so just return. |
| 4471 | __ ret(0); |
| 4472 | } |
| 4473 | |
| 4474 | __ bind(&check_for_strings); |
| 4475 | |
| 4476 | __ JumpIfNotBothSequentialAsciiStrings(edx, eax, ecx, ebx, |
| 4477 | &check_unequal_objects); |
| 4478 | |
| 4479 | // Inline comparison of ascii strings. |
| 4480 | StringCompareStub::GenerateCompareFlatAsciiStrings(masm, |
| 4481 | edx, |
| 4482 | eax, |
| 4483 | ecx, |
| 4484 | ebx, |
| 4485 | edi); |
| 4486 | #ifdef DEBUG |
| 4487 | __ Abort("Unexpected fall-through from string comparison"); |
| 4488 | #endif |
| 4489 | |
| 4490 | __ bind(&check_unequal_objects); |
| 4491 | if (cc_ == equal && !strict_) { |
| 4492 | // Non-strict equality. Objects are unequal if |
| 4493 | // they are both JSObjects and not undetectable, |
| 4494 | // and their pointers are different. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4495 | NearLabel not_both_objects; |
| 4496 | NearLabel return_unequal; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4497 | // At most one is a smi, so we can test for smi by adding the two. |
| 4498 | // A smi plus a heap object has the low bit set, a heap object plus |
| 4499 | // a heap object has the low bit clear. |
| 4500 | STATIC_ASSERT(kSmiTag == 0); |
| 4501 | STATIC_ASSERT(kSmiTagMask == 1); |
| 4502 | __ lea(ecx, Operand(eax, edx, times_1, 0)); |
| 4503 | __ test(ecx, Immediate(kSmiTagMask)); |
| 4504 | __ j(not_zero, ¬_both_objects); |
| 4505 | __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, ecx); |
| 4506 | __ j(below, ¬_both_objects); |
| 4507 | __ CmpObjectType(edx, FIRST_JS_OBJECT_TYPE, ebx); |
| 4508 | __ j(below, ¬_both_objects); |
| 4509 | // We do not bail out after this point. Both are JSObjects, and |
| 4510 | // they are equal if and only if both are undetectable. |
| 4511 | // The and of the undetectable flags is 1 if and only if they are equal. |
| 4512 | __ test_b(FieldOperand(ecx, Map::kBitFieldOffset), |
| 4513 | 1 << Map::kIsUndetectable); |
| 4514 | __ j(zero, &return_unequal); |
| 4515 | __ test_b(FieldOperand(ebx, Map::kBitFieldOffset), |
| 4516 | 1 << Map::kIsUndetectable); |
| 4517 | __ j(zero, &return_unequal); |
| 4518 | // The objects are both undetectable, so they both compare as the value |
| 4519 | // undefined, and are equal. |
| 4520 | __ Set(eax, Immediate(EQUAL)); |
| 4521 | __ bind(&return_unequal); |
| 4522 | // Return non-equal by returning the non-zero object pointer in eax, |
| 4523 | // or return equal if we fell through to here. |
| 4524 | __ ret(0); // rax, rdx were pushed |
| 4525 | __ bind(¬_both_objects); |
| 4526 | } |
| 4527 | |
| 4528 | // Push arguments below the return address. |
| 4529 | __ pop(ecx); |
| 4530 | __ push(edx); |
| 4531 | __ push(eax); |
| 4532 | |
| 4533 | // Figure out which native to call and setup the arguments. |
| 4534 | Builtins::JavaScript builtin; |
| 4535 | if (cc_ == equal) { |
| 4536 | builtin = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS; |
| 4537 | } else { |
| 4538 | builtin = Builtins::COMPARE; |
| 4539 | __ push(Immediate(Smi::FromInt(NegativeComparisonResult(cc_)))); |
| 4540 | } |
| 4541 | |
| 4542 | // Restore return address on the stack. |
| 4543 | __ push(ecx); |
| 4544 | |
| 4545 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 4546 | // tagged as a small integer. |
| 4547 | __ InvokeBuiltin(builtin, JUMP_FUNCTION); |
| 4548 | } |
| 4549 | |
| 4550 | |
| 4551 | void CompareStub::BranchIfNonSymbol(MacroAssembler* masm, |
| 4552 | Label* label, |
| 4553 | Register object, |
| 4554 | Register scratch) { |
| 4555 | __ test(object, Immediate(kSmiTagMask)); |
| 4556 | __ j(zero, label); |
| 4557 | __ mov(scratch, FieldOperand(object, HeapObject::kMapOffset)); |
| 4558 | __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset)); |
| 4559 | __ and_(scratch, kIsSymbolMask | kIsNotStringMask); |
| 4560 | __ cmp(scratch, kSymbolTag | kStringTag); |
| 4561 | __ j(not_equal, label); |
| 4562 | } |
| 4563 | |
| 4564 | |
| 4565 | void StackCheckStub::Generate(MacroAssembler* masm) { |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 4566 | __ TailCallRuntime(Runtime::kStackGuard, 0, 1); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4567 | } |
| 4568 | |
| 4569 | |
| 4570 | void CallFunctionStub::Generate(MacroAssembler* masm) { |
| 4571 | Label slow; |
| 4572 | |
| 4573 | // If the receiver might be a value (string, number or boolean) check for this |
| 4574 | // and box it if it is. |
| 4575 | if (ReceiverMightBeValue()) { |
| 4576 | // Get the receiver from the stack. |
| 4577 | // +1 ~ return address |
| 4578 | Label receiver_is_value, receiver_is_js_object; |
| 4579 | __ mov(eax, Operand(esp, (argc_ + 1) * kPointerSize)); |
| 4580 | |
| 4581 | // Check if receiver is a smi (which is a number value). |
| 4582 | __ test(eax, Immediate(kSmiTagMask)); |
| 4583 | __ j(zero, &receiver_is_value, not_taken); |
| 4584 | |
| 4585 | // Check if the receiver is a valid JS object. |
| 4586 | __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, edi); |
| 4587 | __ j(above_equal, &receiver_is_js_object); |
| 4588 | |
| 4589 | // Call the runtime to box the value. |
| 4590 | __ bind(&receiver_is_value); |
| 4591 | __ EnterInternalFrame(); |
| 4592 | __ push(eax); |
| 4593 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 4594 | __ LeaveInternalFrame(); |
| 4595 | __ mov(Operand(esp, (argc_ + 1) * kPointerSize), eax); |
| 4596 | |
| 4597 | __ bind(&receiver_is_js_object); |
| 4598 | } |
| 4599 | |
| 4600 | // Get the function to call from the stack. |
| 4601 | // +2 ~ receiver, return address |
| 4602 | __ mov(edi, Operand(esp, (argc_ + 2) * kPointerSize)); |
| 4603 | |
| 4604 | // Check that the function really is a JavaScript function. |
| 4605 | __ test(edi, Immediate(kSmiTagMask)); |
| 4606 | __ j(zero, &slow, not_taken); |
| 4607 | // Goto slow case if we do not have a function. |
| 4608 | __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); |
| 4609 | __ j(not_equal, &slow, not_taken); |
| 4610 | |
| 4611 | // Fast-case: Just invoke the function. |
| 4612 | ParameterCount actual(argc_); |
| 4613 | __ InvokeFunction(edi, actual, JUMP_FUNCTION); |
| 4614 | |
| 4615 | // Slow-case: Non-function called. |
| 4616 | __ bind(&slow); |
| 4617 | // CALL_NON_FUNCTION expects the non-function callee as receiver (instead |
| 4618 | // of the original receiver from the call site). |
| 4619 | __ mov(Operand(esp, (argc_ + 1) * kPointerSize), edi); |
| 4620 | __ Set(eax, Immediate(argc_)); |
| 4621 | __ Set(ebx, Immediate(0)); |
| 4622 | __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION); |
| 4623 | Handle<Code> adaptor(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)); |
| 4624 | __ jmp(adaptor, RelocInfo::CODE_TARGET); |
| 4625 | } |
| 4626 | |
| 4627 | |
| 4628 | void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) { |
| 4629 | // eax holds the exception. |
| 4630 | |
| 4631 | // Adjust this code if not the case. |
| 4632 | STATIC_ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 4633 | |
| 4634 | // Drop the sp to the top of the handler. |
| 4635 | ExternalReference handler_address(Top::k_handler_address); |
| 4636 | __ mov(esp, Operand::StaticVariable(handler_address)); |
| 4637 | |
| 4638 | // Restore next handler and frame pointer, discard handler state. |
| 4639 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 4640 | __ pop(Operand::StaticVariable(handler_address)); |
| 4641 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 1 * kPointerSize); |
| 4642 | __ pop(ebp); |
| 4643 | __ pop(edx); // Remove state. |
| 4644 | |
| 4645 | // Before returning we restore the context from the frame pointer if |
| 4646 | // not NULL. The frame pointer is NULL in the exception handler of |
| 4647 | // a JS entry frame. |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 4648 | __ Set(esi, Immediate(0)); // Tentatively set context pointer to NULL. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4649 | NearLabel skip; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4650 | __ cmp(ebp, 0); |
| 4651 | __ j(equal, &skip, not_taken); |
| 4652 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 4653 | __ bind(&skip); |
| 4654 | |
| 4655 | STATIC_ASSERT(StackHandlerConstants::kPCOffset == 3 * kPointerSize); |
| 4656 | __ ret(0); |
| 4657 | } |
| 4658 | |
| 4659 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4660 | void CEntryStub::GenerateCore(MacroAssembler* masm, |
| 4661 | Label* throw_normal_exception, |
| 4662 | Label* throw_termination_exception, |
| 4663 | Label* throw_out_of_memory_exception, |
| 4664 | bool do_gc, |
| 4665 | bool always_allocate_scope, |
| 4666 | int /* alignment_skew */) { |
| 4667 | // eax: result parameter for PerformGC, if any |
| 4668 | // ebx: pointer to C function (C callee-saved) |
| 4669 | // ebp: frame pointer (restored after C call) |
| 4670 | // esp: stack pointer (restored after C call) |
| 4671 | // edi: number of arguments including receiver (C callee-saved) |
| 4672 | // esi: pointer to the first argument (C callee-saved) |
| 4673 | |
| 4674 | // Result returned in eax, or eax+edx if result_size_ is 2. |
| 4675 | |
| 4676 | // Check stack alignment. |
| 4677 | if (FLAG_debug_code) { |
| 4678 | __ CheckStackAlignment(); |
| 4679 | } |
| 4680 | |
| 4681 | if (do_gc) { |
| 4682 | // Pass failure code returned from last attempt as first argument to |
| 4683 | // PerformGC. No need to use PrepareCallCFunction/CallCFunction here as the |
| 4684 | // stack alignment is known to be correct. This function takes one argument |
| 4685 | // which is passed on the stack, and we know that the stack has been |
| 4686 | // prepared to pass at least one argument. |
| 4687 | __ mov(Operand(esp, 0 * kPointerSize), eax); // Result. |
| 4688 | __ call(FUNCTION_ADDR(Runtime::PerformGC), RelocInfo::RUNTIME_ENTRY); |
| 4689 | } |
| 4690 | |
| 4691 | ExternalReference scope_depth = |
| 4692 | ExternalReference::heap_always_allocate_scope_depth(); |
| 4693 | if (always_allocate_scope) { |
| 4694 | __ inc(Operand::StaticVariable(scope_depth)); |
| 4695 | } |
| 4696 | |
| 4697 | // Call C function. |
| 4698 | __ mov(Operand(esp, 0 * kPointerSize), edi); // argc. |
| 4699 | __ mov(Operand(esp, 1 * kPointerSize), esi); // argv. |
| 4700 | __ call(Operand(ebx)); |
| 4701 | // Result is in eax or edx:eax - do not destroy these registers! |
| 4702 | |
| 4703 | if (always_allocate_scope) { |
| 4704 | __ dec(Operand::StaticVariable(scope_depth)); |
| 4705 | } |
| 4706 | |
| 4707 | // Make sure we're not trying to return 'the hole' from the runtime |
| 4708 | // call as this may lead to crashes in the IC code later. |
| 4709 | if (FLAG_debug_code) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4710 | NearLabel okay; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4711 | __ cmp(eax, Factory::the_hole_value()); |
| 4712 | __ j(not_equal, &okay); |
| 4713 | __ int3(); |
| 4714 | __ bind(&okay); |
| 4715 | } |
| 4716 | |
| 4717 | // Check for failure result. |
| 4718 | Label failure_returned; |
| 4719 | STATIC_ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
| 4720 | __ lea(ecx, Operand(eax, 1)); |
| 4721 | // Lower 2 bits of ecx are 0 iff eax has failure tag. |
| 4722 | __ test(ecx, Immediate(kFailureTagMask)); |
| 4723 | __ j(zero, &failure_returned, not_taken); |
| 4724 | |
| 4725 | // Exit the JavaScript to C++ exit frame. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4726 | __ LeaveExitFrame(save_doubles_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4727 | __ ret(0); |
| 4728 | |
| 4729 | // Handling of failure. |
| 4730 | __ bind(&failure_returned); |
| 4731 | |
| 4732 | Label retry; |
| 4733 | // If the returned exception is RETRY_AFTER_GC continue at retry label |
| 4734 | STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0); |
| 4735 | __ test(eax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
| 4736 | __ j(zero, &retry, taken); |
| 4737 | |
| 4738 | // Special handling of out of memory exceptions. |
| 4739 | __ cmp(eax, reinterpret_cast<int32_t>(Failure::OutOfMemoryException())); |
| 4740 | __ j(equal, throw_out_of_memory_exception); |
| 4741 | |
| 4742 | // Retrieve the pending exception and clear the variable. |
| 4743 | ExternalReference pending_exception_address(Top::k_pending_exception_address); |
| 4744 | __ mov(eax, Operand::StaticVariable(pending_exception_address)); |
| 4745 | __ mov(edx, |
| 4746 | Operand::StaticVariable(ExternalReference::the_hole_value_location())); |
| 4747 | __ mov(Operand::StaticVariable(pending_exception_address), edx); |
| 4748 | |
| 4749 | // Special handling of termination exceptions which are uncatchable |
| 4750 | // by javascript code. |
| 4751 | __ cmp(eax, Factory::termination_exception()); |
| 4752 | __ j(equal, throw_termination_exception); |
| 4753 | |
| 4754 | // Handle normal exception. |
| 4755 | __ jmp(throw_normal_exception); |
| 4756 | |
| 4757 | // Retry. |
| 4758 | __ bind(&retry); |
| 4759 | } |
| 4760 | |
| 4761 | |
| 4762 | void CEntryStub::GenerateThrowUncatchable(MacroAssembler* masm, |
| 4763 | UncatchableExceptionType type) { |
| 4764 | // Adjust this code if not the case. |
| 4765 | STATIC_ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 4766 | |
| 4767 | // Drop sp to the top stack handler. |
| 4768 | ExternalReference handler_address(Top::k_handler_address); |
| 4769 | __ mov(esp, Operand::StaticVariable(handler_address)); |
| 4770 | |
| 4771 | // Unwind the handlers until the ENTRY handler is found. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 4772 | NearLabel loop, done; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4773 | __ bind(&loop); |
| 4774 | // Load the type of the current stack handler. |
| 4775 | const int kStateOffset = StackHandlerConstants::kStateOffset; |
| 4776 | __ cmp(Operand(esp, kStateOffset), Immediate(StackHandler::ENTRY)); |
| 4777 | __ j(equal, &done); |
| 4778 | // Fetch the next handler in the list. |
| 4779 | const int kNextOffset = StackHandlerConstants::kNextOffset; |
| 4780 | __ mov(esp, Operand(esp, kNextOffset)); |
| 4781 | __ jmp(&loop); |
| 4782 | __ bind(&done); |
| 4783 | |
| 4784 | // Set the top handler address to next handler past the current ENTRY handler. |
| 4785 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 4786 | __ pop(Operand::StaticVariable(handler_address)); |
| 4787 | |
| 4788 | if (type == OUT_OF_MEMORY) { |
| 4789 | // Set external caught exception to false. |
| 4790 | ExternalReference external_caught(Top::k_external_caught_exception_address); |
| 4791 | __ mov(eax, false); |
| 4792 | __ mov(Operand::StaticVariable(external_caught), eax); |
| 4793 | |
| 4794 | // Set pending exception and eax to out of memory exception. |
| 4795 | ExternalReference pending_exception(Top::k_pending_exception_address); |
| 4796 | __ mov(eax, reinterpret_cast<int32_t>(Failure::OutOfMemoryException())); |
| 4797 | __ mov(Operand::StaticVariable(pending_exception), eax); |
| 4798 | } |
| 4799 | |
| 4800 | // Clear the context pointer. |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 4801 | __ Set(esi, Immediate(0)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4802 | |
| 4803 | // Restore fp from handler and discard handler state. |
| 4804 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 1 * kPointerSize); |
| 4805 | __ pop(ebp); |
| 4806 | __ pop(edx); // State. |
| 4807 | |
| 4808 | STATIC_ASSERT(StackHandlerConstants::kPCOffset == 3 * kPointerSize); |
| 4809 | __ ret(0); |
| 4810 | } |
| 4811 | |
| 4812 | |
| 4813 | void CEntryStub::Generate(MacroAssembler* masm) { |
| 4814 | // eax: number of arguments including receiver |
| 4815 | // ebx: pointer to C function (C callee-saved) |
| 4816 | // ebp: frame pointer (restored after C call) |
| 4817 | // esp: stack pointer (restored after C call) |
| 4818 | // esi: current context (C callee-saved) |
| 4819 | // edi: JS function of the caller (C callee-saved) |
| 4820 | |
| 4821 | // NOTE: Invocations of builtins may return failure objects instead |
| 4822 | // of a proper result. The builtin entry handles this by performing |
| 4823 | // a garbage collection and retrying the builtin (twice). |
| 4824 | |
| 4825 | // Enter the exit frame that transitions from JavaScript to C++. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 4826 | __ EnterExitFrame(save_doubles_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4827 | |
| 4828 | // eax: result parameter for PerformGC, if any (setup below) |
| 4829 | // ebx: pointer to builtin function (C callee-saved) |
| 4830 | // ebp: frame pointer (restored after C call) |
| 4831 | // esp: stack pointer (restored after C call) |
| 4832 | // edi: number of arguments including receiver (C callee-saved) |
| 4833 | // esi: argv pointer (C callee-saved) |
| 4834 | |
| 4835 | Label throw_normal_exception; |
| 4836 | Label throw_termination_exception; |
| 4837 | Label throw_out_of_memory_exception; |
| 4838 | |
| 4839 | // Call into the runtime system. |
| 4840 | GenerateCore(masm, |
| 4841 | &throw_normal_exception, |
| 4842 | &throw_termination_exception, |
| 4843 | &throw_out_of_memory_exception, |
| 4844 | false, |
| 4845 | false); |
| 4846 | |
| 4847 | // Do space-specific GC and retry runtime call. |
| 4848 | GenerateCore(masm, |
| 4849 | &throw_normal_exception, |
| 4850 | &throw_termination_exception, |
| 4851 | &throw_out_of_memory_exception, |
| 4852 | true, |
| 4853 | false); |
| 4854 | |
| 4855 | // Do full GC and retry runtime call one final time. |
| 4856 | Failure* failure = Failure::InternalError(); |
| 4857 | __ mov(eax, Immediate(reinterpret_cast<int32_t>(failure))); |
| 4858 | GenerateCore(masm, |
| 4859 | &throw_normal_exception, |
| 4860 | &throw_termination_exception, |
| 4861 | &throw_out_of_memory_exception, |
| 4862 | true, |
| 4863 | true); |
| 4864 | |
| 4865 | __ bind(&throw_out_of_memory_exception); |
| 4866 | GenerateThrowUncatchable(masm, OUT_OF_MEMORY); |
| 4867 | |
| 4868 | __ bind(&throw_termination_exception); |
| 4869 | GenerateThrowUncatchable(masm, TERMINATION); |
| 4870 | |
| 4871 | __ bind(&throw_normal_exception); |
| 4872 | GenerateThrowTOS(masm); |
| 4873 | } |
| 4874 | |
| 4875 | |
| 4876 | void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) { |
| 4877 | Label invoke, exit; |
| 4878 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 4879 | Label not_outermost_js, not_outermost_js_2; |
| 4880 | #endif |
| 4881 | |
| 4882 | // Setup frame. |
| 4883 | __ push(ebp); |
| 4884 | __ mov(ebp, Operand(esp)); |
| 4885 | |
| 4886 | // Push marker in two places. |
| 4887 | int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY; |
| 4888 | __ push(Immediate(Smi::FromInt(marker))); // context slot |
| 4889 | __ push(Immediate(Smi::FromInt(marker))); // function slot |
| 4890 | // Save callee-saved registers (C calling conventions). |
| 4891 | __ push(edi); |
| 4892 | __ push(esi); |
| 4893 | __ push(ebx); |
| 4894 | |
| 4895 | // Save copies of the top frame descriptor on the stack. |
| 4896 | ExternalReference c_entry_fp(Top::k_c_entry_fp_address); |
| 4897 | __ push(Operand::StaticVariable(c_entry_fp)); |
| 4898 | |
| 4899 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 4900 | // If this is the outermost JS call, set js_entry_sp value. |
| 4901 | ExternalReference js_entry_sp(Top::k_js_entry_sp_address); |
| 4902 | __ cmp(Operand::StaticVariable(js_entry_sp), Immediate(0)); |
| 4903 | __ j(not_equal, ¬_outermost_js); |
| 4904 | __ mov(Operand::StaticVariable(js_entry_sp), ebp); |
| 4905 | __ bind(¬_outermost_js); |
| 4906 | #endif |
| 4907 | |
| 4908 | // Call a faked try-block that does the invoke. |
| 4909 | __ call(&invoke); |
| 4910 | |
| 4911 | // Caught exception: Store result (exception) in the pending |
| 4912 | // exception field in the JSEnv and return a failure sentinel. |
| 4913 | ExternalReference pending_exception(Top::k_pending_exception_address); |
| 4914 | __ mov(Operand::StaticVariable(pending_exception), eax); |
| 4915 | __ mov(eax, reinterpret_cast<int32_t>(Failure::Exception())); |
| 4916 | __ jmp(&exit); |
| 4917 | |
| 4918 | // Invoke: Link this frame into the handler chain. |
| 4919 | __ bind(&invoke); |
| 4920 | __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); |
| 4921 | |
| 4922 | // Clear any pending exceptions. |
| 4923 | __ mov(edx, |
| 4924 | Operand::StaticVariable(ExternalReference::the_hole_value_location())); |
| 4925 | __ mov(Operand::StaticVariable(pending_exception), edx); |
| 4926 | |
| 4927 | // Fake a receiver (NULL). |
| 4928 | __ push(Immediate(0)); // receiver |
| 4929 | |
| 4930 | // Invoke the function by calling through JS entry trampoline |
| 4931 | // builtin and pop the faked function when we return. Notice that we |
| 4932 | // cannot store a reference to the trampoline code directly in this |
| 4933 | // stub, because the builtin stubs may not have been generated yet. |
| 4934 | if (is_construct) { |
| 4935 | ExternalReference construct_entry(Builtins::JSConstructEntryTrampoline); |
| 4936 | __ mov(edx, Immediate(construct_entry)); |
| 4937 | } else { |
| 4938 | ExternalReference entry(Builtins::JSEntryTrampoline); |
| 4939 | __ mov(edx, Immediate(entry)); |
| 4940 | } |
| 4941 | __ mov(edx, Operand(edx, 0)); // deref address |
| 4942 | __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); |
| 4943 | __ call(Operand(edx)); |
| 4944 | |
| 4945 | // Unlink this frame from the handler chain. |
| 4946 | __ pop(Operand::StaticVariable(ExternalReference(Top::k_handler_address))); |
| 4947 | // Pop next_sp. |
| 4948 | __ add(Operand(esp), Immediate(StackHandlerConstants::kSize - kPointerSize)); |
| 4949 | |
| 4950 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 4951 | // If current EBP value is the same as js_entry_sp value, it means that |
| 4952 | // the current function is the outermost. |
| 4953 | __ cmp(ebp, Operand::StaticVariable(js_entry_sp)); |
| 4954 | __ j(not_equal, ¬_outermost_js_2); |
| 4955 | __ mov(Operand::StaticVariable(js_entry_sp), Immediate(0)); |
| 4956 | __ bind(¬_outermost_js_2); |
| 4957 | #endif |
| 4958 | |
| 4959 | // Restore the top frame descriptor from the stack. |
| 4960 | __ bind(&exit); |
| 4961 | __ pop(Operand::StaticVariable(ExternalReference(Top::k_c_entry_fp_address))); |
| 4962 | |
| 4963 | // Restore callee-saved registers (C calling conventions). |
| 4964 | __ pop(ebx); |
| 4965 | __ pop(esi); |
| 4966 | __ pop(edi); |
| 4967 | __ add(Operand(esp), Immediate(2 * kPointerSize)); // remove markers |
| 4968 | |
| 4969 | // Restore frame pointer and return. |
| 4970 | __ pop(ebp); |
| 4971 | __ ret(0); |
| 4972 | } |
| 4973 | |
| 4974 | |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 4975 | // Generate stub code for instanceof. |
| 4976 | // This code can patch a call site inlined cache of the instance of check, |
| 4977 | // which looks like this. |
| 4978 | // |
| 4979 | // 81 ff XX XX XX XX cmp edi, <the hole, patched to a map> |
| 4980 | // 75 0a jne <some near label> |
| 4981 | // b8 XX XX XX XX mov eax, <the hole, patched to either true or false> |
| 4982 | // |
| 4983 | // If call site patching is requested the stack will have the delta from the |
| 4984 | // return address to the cmp instruction just below the return address. This |
| 4985 | // also means that call site patching can only take place with arguments in |
| 4986 | // registers. TOS looks like this when call site patching is requested |
| 4987 | // |
| 4988 | // esp[0] : return address |
| 4989 | // esp[4] : delta from return address to cmp instruction |
| 4990 | // |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 4991 | void InstanceofStub::Generate(MacroAssembler* masm) { |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 4992 | // Call site inlining and patching implies arguments in registers. |
| 4993 | ASSERT(HasArgsInRegisters() || !HasCallSiteInlineCheck()); |
| 4994 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 4995 | // Fixed register usage throughout the stub. |
| 4996 | Register object = eax; // Object (lhs). |
| 4997 | Register map = ebx; // Map of the object. |
| 4998 | Register function = edx; // Function (rhs). |
| 4999 | Register prototype = edi; // Prototype of the function. |
| 5000 | Register scratch = ecx; |
| 5001 | |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5002 | // Constants describing the call site code to patch. |
| 5003 | static const int kDeltaToCmpImmediate = 2; |
| 5004 | static const int kDeltaToMov = 8; |
| 5005 | static const int kDeltaToMovImmediate = 9; |
| 5006 | static const int8_t kCmpEdiImmediateByte1 = BitCast<int8_t, uint8_t>(0x81); |
| 5007 | static const int8_t kCmpEdiImmediateByte2 = BitCast<int8_t, uint8_t>(0xff); |
| 5008 | static const int8_t kMovEaxImmediateByte = BitCast<int8_t, uint8_t>(0xb8); |
| 5009 | |
| 5010 | ExternalReference roots_address = ExternalReference::roots_address(); |
| 5011 | |
| 5012 | ASSERT_EQ(object.code(), InstanceofStub::left().code()); |
| 5013 | ASSERT_EQ(function.code(), InstanceofStub::right().code()); |
| 5014 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5015 | // Get the object and function - they are always both needed. |
| 5016 | Label slow, not_js_object; |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5017 | if (!HasArgsInRegisters()) { |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5018 | __ mov(object, Operand(esp, 2 * kPointerSize)); |
| 5019 | __ mov(function, Operand(esp, 1 * kPointerSize)); |
| 5020 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5021 | |
| 5022 | // Check that the left hand is a JS object. |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5023 | __ test(object, Immediate(kSmiTagMask)); |
| 5024 | __ j(zero, ¬_js_object, not_taken); |
| 5025 | __ IsObjectJSObjectType(object, map, scratch, ¬_js_object); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5026 | |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5027 | // If there is a call site cache don't look in the global cache, but do the |
| 5028 | // real lookup and update the call site cache. |
| 5029 | if (!HasCallSiteInlineCheck()) { |
| 5030 | // Look up the function and the map in the instanceof cache. |
| 5031 | NearLabel miss; |
| 5032 | __ mov(scratch, Immediate(Heap::kInstanceofCacheFunctionRootIndex)); |
| 5033 | __ cmp(function, |
| 5034 | Operand::StaticArray(scratch, times_pointer_size, roots_address)); |
| 5035 | __ j(not_equal, &miss); |
| 5036 | __ mov(scratch, Immediate(Heap::kInstanceofCacheMapRootIndex)); |
| 5037 | __ cmp(map, Operand::StaticArray( |
| 5038 | scratch, times_pointer_size, roots_address)); |
| 5039 | __ j(not_equal, &miss); |
| 5040 | __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex)); |
| 5041 | __ mov(eax, Operand::StaticArray( |
| 5042 | scratch, times_pointer_size, roots_address)); |
| 5043 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
| 5044 | __ bind(&miss); |
| 5045 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5046 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5047 | // Get the prototype of the function. |
| 5048 | __ TryGetFunctionPrototype(function, prototype, scratch, &slow); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5049 | |
| 5050 | // Check that the function prototype is a JS object. |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5051 | __ test(prototype, Immediate(kSmiTagMask)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5052 | __ j(zero, &slow, not_taken); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5053 | __ IsObjectJSObjectType(prototype, scratch, scratch, &slow); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5054 | |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5055 | // Update the global instanceof or call site inlined cache with the current |
| 5056 | // map and function. The cached answer will be set when it is known below. |
| 5057 | if (!HasCallSiteInlineCheck()) { |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5058 | __ mov(scratch, Immediate(Heap::kInstanceofCacheMapRootIndex)); |
| 5059 | __ mov(Operand::StaticArray(scratch, times_pointer_size, roots_address), map); |
| 5060 | __ mov(scratch, Immediate(Heap::kInstanceofCacheFunctionRootIndex)); |
| 5061 | __ mov(Operand::StaticArray(scratch, times_pointer_size, roots_address), |
| 5062 | function); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5063 | } else { |
| 5064 | // The constants for the code patching are based on no push instructions |
| 5065 | // at the call site. |
| 5066 | ASSERT(HasArgsInRegisters()); |
| 5067 | // Get return address and delta to inlined map check. |
| 5068 | __ mov(scratch, Operand(esp, 0 * kPointerSize)); |
| 5069 | __ sub(scratch, Operand(esp, 1 * kPointerSize)); |
| 5070 | if (FLAG_debug_code) { |
| 5071 | __ cmpb(Operand(scratch, 0), kCmpEdiImmediateByte1); |
| 5072 | __ Assert(equal, "InstanceofStub unexpected call site cache (cmp 1)"); |
| 5073 | __ cmpb(Operand(scratch, 1), kCmpEdiImmediateByte2); |
| 5074 | __ Assert(equal, "InstanceofStub unexpected call site cache (cmp 2)"); |
| 5075 | } |
| 5076 | __ mov(Operand(scratch, kDeltaToCmpImmediate), map); |
| 5077 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5078 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5079 | // Loop through the prototype chain of the object looking for the function |
| 5080 | // prototype. |
| 5081 | __ mov(scratch, FieldOperand(map, Map::kPrototypeOffset)); |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 5082 | NearLabel loop, is_instance, is_not_instance; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5083 | __ bind(&loop); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5084 | __ cmp(scratch, Operand(prototype)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5085 | __ j(equal, &is_instance); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5086 | __ cmp(Operand(scratch), Immediate(Factory::null_value())); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5087 | __ j(equal, &is_not_instance); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5088 | __ mov(scratch, FieldOperand(scratch, HeapObject::kMapOffset)); |
| 5089 | __ mov(scratch, FieldOperand(scratch, Map::kPrototypeOffset)); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5090 | __ jmp(&loop); |
| 5091 | |
| 5092 | __ bind(&is_instance); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5093 | if (!HasCallSiteInlineCheck()) { |
| 5094 | __ Set(eax, Immediate(0)); |
| 5095 | __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex)); |
| 5096 | __ mov(Operand::StaticArray(scratch, |
| 5097 | times_pointer_size, roots_address), eax); |
| 5098 | } else { |
| 5099 | // Get return address and delta to inlined map check. |
| 5100 | __ mov(eax, Factory::true_value()); |
| 5101 | __ mov(scratch, Operand(esp, 0 * kPointerSize)); |
| 5102 | __ sub(scratch, Operand(esp, 1 * kPointerSize)); |
| 5103 | if (FLAG_debug_code) { |
| 5104 | __ cmpb(Operand(scratch, kDeltaToMov), kMovEaxImmediateByte); |
| 5105 | __ Assert(equal, "InstanceofStub unexpected call site cache (mov)"); |
| 5106 | } |
| 5107 | __ mov(Operand(scratch, kDeltaToMovImmediate), eax); |
| 5108 | if (!ReturnTrueFalseObject()) { |
| 5109 | __ Set(eax, Immediate(0)); |
| 5110 | } |
| 5111 | } |
| 5112 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5113 | |
| 5114 | __ bind(&is_not_instance); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5115 | if (!HasCallSiteInlineCheck()) { |
| 5116 | __ Set(eax, Immediate(Smi::FromInt(1))); |
| 5117 | __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex)); |
| 5118 | __ mov(Operand::StaticArray( |
| 5119 | scratch, times_pointer_size, roots_address), eax); |
| 5120 | } else { |
| 5121 | // Get return address and delta to inlined map check. |
| 5122 | __ mov(eax, Factory::false_value()); |
| 5123 | __ mov(scratch, Operand(esp, 0 * kPointerSize)); |
| 5124 | __ sub(scratch, Operand(esp, 1 * kPointerSize)); |
| 5125 | if (FLAG_debug_code) { |
| 5126 | __ cmpb(Operand(scratch, kDeltaToMov), kMovEaxImmediateByte); |
| 5127 | __ Assert(equal, "InstanceofStub unexpected call site cache (mov)"); |
| 5128 | } |
| 5129 | __ mov(Operand(scratch, kDeltaToMovImmediate), eax); |
| 5130 | if (!ReturnTrueFalseObject()) { |
| 5131 | __ Set(eax, Immediate(Smi::FromInt(1))); |
| 5132 | } |
| 5133 | } |
| 5134 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5135 | |
| 5136 | Label object_not_null, object_not_null_or_smi; |
| 5137 | __ bind(¬_js_object); |
| 5138 | // Before null, smi and string value checks, check that the rhs is a function |
| 5139 | // as for a non-function rhs an exception needs to be thrown. |
| 5140 | __ test(function, Immediate(kSmiTagMask)); |
| 5141 | __ j(zero, &slow, not_taken); |
| 5142 | __ CmpObjectType(function, JS_FUNCTION_TYPE, scratch); |
| 5143 | __ j(not_equal, &slow, not_taken); |
| 5144 | |
| 5145 | // Null is not instance of anything. |
| 5146 | __ cmp(object, Factory::null_value()); |
| 5147 | __ j(not_equal, &object_not_null); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5148 | __ Set(eax, Immediate(Smi::FromInt(1))); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5149 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5150 | |
| 5151 | __ bind(&object_not_null); |
| 5152 | // Smi values is not instance of anything. |
| 5153 | __ test(object, Immediate(kSmiTagMask)); |
| 5154 | __ j(not_zero, &object_not_null_or_smi, not_taken); |
| 5155 | __ Set(eax, Immediate(Smi::FromInt(1))); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5156 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5157 | |
| 5158 | __ bind(&object_not_null_or_smi); |
| 5159 | // String values is not instance of anything. |
| 5160 | Condition is_string = masm->IsObjectStringType(object, scratch, scratch); |
| 5161 | __ j(NegateCondition(is_string), &slow); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5162 | __ Set(eax, Immediate(Smi::FromInt(1))); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5163 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5164 | |
| 5165 | // Slow-case: Go through the JavaScript implementation. |
| 5166 | __ bind(&slow); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5167 | if (!ReturnTrueFalseObject()) { |
| 5168 | // Tail call the builtin which returns 0 or 1. |
| 5169 | if (HasArgsInRegisters()) { |
| 5170 | // Push arguments below return address. |
| 5171 | __ pop(scratch); |
| 5172 | __ push(object); |
| 5173 | __ push(function); |
| 5174 | __ push(scratch); |
| 5175 | } |
| 5176 | __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION); |
| 5177 | } else { |
| 5178 | // Call the builtin and convert 0/1 to true/false. |
| 5179 | __ EnterInternalFrame(); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5180 | __ push(object); |
| 5181 | __ push(function); |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5182 | __ InvokeBuiltin(Builtins::INSTANCE_OF, CALL_FUNCTION); |
| 5183 | __ LeaveInternalFrame(); |
| 5184 | NearLabel true_value, done; |
| 5185 | __ test(eax, Operand(eax)); |
| 5186 | __ j(zero, &true_value); |
| 5187 | __ mov(eax, Factory::false_value()); |
| 5188 | __ jmp(&done); |
| 5189 | __ bind(&true_value); |
| 5190 | __ mov(eax, Factory::true_value()); |
| 5191 | __ bind(&done); |
| 5192 | __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 5193 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5194 | } |
| 5195 | |
| 5196 | |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame^] | 5197 | Register InstanceofStub::left() { return eax; } |
| 5198 | |
| 5199 | |
| 5200 | Register InstanceofStub::right() { return edx; } |
| 5201 | |
| 5202 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5203 | int CompareStub::MinorKey() { |
| 5204 | // Encode the three parameters in a unique 16 bit value. To avoid duplicate |
| 5205 | // stubs the never NaN NaN condition is only taken into account if the |
| 5206 | // condition is equals. |
| 5207 | ASSERT(static_cast<unsigned>(cc_) < (1 << 12)); |
| 5208 | ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| 5209 | return ConditionField::encode(static_cast<unsigned>(cc_)) |
| 5210 | | RegisterField::encode(false) // lhs_ and rhs_ are not used |
| 5211 | | StrictField::encode(strict_) |
| 5212 | | NeverNanNanField::encode(cc_ == equal ? never_nan_nan_ : false) |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 5213 | | IncludeNumberCompareField::encode(include_number_compare_) |
| 5214 | | IncludeSmiCompareField::encode(include_smi_compare_); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5215 | } |
| 5216 | |
| 5217 | |
| 5218 | // Unfortunately you have to run without snapshots to see most of these |
| 5219 | // names in the profile since most compare stubs end up in the snapshot. |
| 5220 | const char* CompareStub::GetName() { |
| 5221 | ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg)); |
| 5222 | |
| 5223 | if (name_ != NULL) return name_; |
| 5224 | const int kMaxNameLength = 100; |
| 5225 | name_ = Bootstrapper::AllocateAutoDeletedArray(kMaxNameLength); |
| 5226 | if (name_ == NULL) return "OOM"; |
| 5227 | |
| 5228 | const char* cc_name; |
| 5229 | switch (cc_) { |
| 5230 | case less: cc_name = "LT"; break; |
| 5231 | case greater: cc_name = "GT"; break; |
| 5232 | case less_equal: cc_name = "LE"; break; |
| 5233 | case greater_equal: cc_name = "GE"; break; |
| 5234 | case equal: cc_name = "EQ"; break; |
| 5235 | case not_equal: cc_name = "NE"; break; |
| 5236 | default: cc_name = "UnknownCondition"; break; |
| 5237 | } |
| 5238 | |
| 5239 | const char* strict_name = ""; |
| 5240 | if (strict_ && (cc_ == equal || cc_ == not_equal)) { |
| 5241 | strict_name = "_STRICT"; |
| 5242 | } |
| 5243 | |
| 5244 | const char* never_nan_nan_name = ""; |
| 5245 | if (never_nan_nan_ && (cc_ == equal || cc_ == not_equal)) { |
| 5246 | never_nan_nan_name = "_NO_NAN"; |
| 5247 | } |
| 5248 | |
| 5249 | const char* include_number_compare_name = ""; |
| 5250 | if (!include_number_compare_) { |
| 5251 | include_number_compare_name = "_NO_NUMBER"; |
| 5252 | } |
| 5253 | |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 5254 | const char* include_smi_compare_name = ""; |
| 5255 | if (!include_smi_compare_) { |
| 5256 | include_smi_compare_name = "_NO_SMI"; |
| 5257 | } |
| 5258 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5259 | OS::SNPrintF(Vector<char>(name_, kMaxNameLength), |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 5260 | "CompareStub_%s%s%s%s%s", |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5261 | cc_name, |
| 5262 | strict_name, |
| 5263 | never_nan_nan_name, |
erik.corry@gmail.com | d88afa2 | 2010-09-15 12:33:05 +0000 | [diff] [blame] | 5264 | include_number_compare_name, |
| 5265 | include_smi_compare_name); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5266 | return name_; |
| 5267 | } |
| 5268 | |
| 5269 | |
| 5270 | // ------------------------------------------------------------------------- |
| 5271 | // StringCharCodeAtGenerator |
| 5272 | |
| 5273 | void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 5274 | Label flat_string; |
| 5275 | Label ascii_string; |
| 5276 | Label got_char_code; |
| 5277 | |
| 5278 | // If the receiver is a smi trigger the non-string case. |
| 5279 | STATIC_ASSERT(kSmiTag == 0); |
| 5280 | __ test(object_, Immediate(kSmiTagMask)); |
| 5281 | __ j(zero, receiver_not_string_); |
| 5282 | |
| 5283 | // Fetch the instance type of the receiver into result register. |
| 5284 | __ mov(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 5285 | __ movzx_b(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| 5286 | // If the receiver is not a string trigger the non-string case. |
| 5287 | __ test(result_, Immediate(kIsNotStringMask)); |
| 5288 | __ j(not_zero, receiver_not_string_); |
| 5289 | |
| 5290 | // If the index is non-smi trigger the non-smi case. |
| 5291 | STATIC_ASSERT(kSmiTag == 0); |
| 5292 | __ test(index_, Immediate(kSmiTagMask)); |
| 5293 | __ j(not_zero, &index_not_smi_); |
| 5294 | |
| 5295 | // Put smi-tagged index into scratch register. |
| 5296 | __ mov(scratch_, index_); |
| 5297 | __ bind(&got_smi_index_); |
| 5298 | |
| 5299 | // Check for index out of range. |
| 5300 | __ cmp(scratch_, FieldOperand(object_, String::kLengthOffset)); |
| 5301 | __ j(above_equal, index_out_of_range_); |
| 5302 | |
| 5303 | // We need special handling for non-flat strings. |
| 5304 | STATIC_ASSERT(kSeqStringTag == 0); |
| 5305 | __ test(result_, Immediate(kStringRepresentationMask)); |
| 5306 | __ j(zero, &flat_string); |
| 5307 | |
| 5308 | // Handle non-flat strings. |
| 5309 | __ test(result_, Immediate(kIsConsStringMask)); |
| 5310 | __ j(zero, &call_runtime_); |
| 5311 | |
| 5312 | // ConsString. |
| 5313 | // Check whether the right hand side is the empty string (i.e. if |
| 5314 | // this is really a flat string in a cons string). If that is not |
| 5315 | // the case we would rather go to the runtime system now to flatten |
| 5316 | // the string. |
| 5317 | __ cmp(FieldOperand(object_, ConsString::kSecondOffset), |
| 5318 | Immediate(Factory::empty_string())); |
| 5319 | __ j(not_equal, &call_runtime_); |
| 5320 | // Get the first of the two strings and load its instance type. |
| 5321 | __ mov(object_, FieldOperand(object_, ConsString::kFirstOffset)); |
| 5322 | __ mov(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 5323 | __ movzx_b(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| 5324 | // If the first cons component is also non-flat, then go to runtime. |
| 5325 | STATIC_ASSERT(kSeqStringTag == 0); |
| 5326 | __ test(result_, Immediate(kStringRepresentationMask)); |
| 5327 | __ j(not_zero, &call_runtime_); |
| 5328 | |
| 5329 | // Check for 1-byte or 2-byte string. |
| 5330 | __ bind(&flat_string); |
| 5331 | STATIC_ASSERT(kAsciiStringTag != 0); |
| 5332 | __ test(result_, Immediate(kStringEncodingMask)); |
| 5333 | __ j(not_zero, &ascii_string); |
| 5334 | |
| 5335 | // 2-byte string. |
| 5336 | // Load the 2-byte character code into the result register. |
| 5337 | STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| 5338 | __ movzx_w(result_, FieldOperand(object_, |
| 5339 | scratch_, times_1, // Scratch is smi-tagged. |
| 5340 | SeqTwoByteString::kHeaderSize)); |
| 5341 | __ jmp(&got_char_code); |
| 5342 | |
| 5343 | // ASCII string. |
| 5344 | // Load the byte into the result register. |
| 5345 | __ bind(&ascii_string); |
| 5346 | __ SmiUntag(scratch_); |
| 5347 | __ movzx_b(result_, FieldOperand(object_, |
| 5348 | scratch_, times_1, |
| 5349 | SeqAsciiString::kHeaderSize)); |
| 5350 | __ bind(&got_char_code); |
| 5351 | __ SmiTag(result_); |
| 5352 | __ bind(&exit_); |
| 5353 | } |
| 5354 | |
| 5355 | |
| 5356 | void StringCharCodeAtGenerator::GenerateSlow( |
| 5357 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 5358 | __ Abort("Unexpected fallthrough to CharCodeAt slow case"); |
| 5359 | |
| 5360 | // Index is not a smi. |
| 5361 | __ bind(&index_not_smi_); |
| 5362 | // If index is a heap number, try converting it to an integer. |
| 5363 | __ CheckMap(index_, Factory::heap_number_map(), index_not_number_, true); |
| 5364 | call_helper.BeforeCall(masm); |
| 5365 | __ push(object_); |
| 5366 | __ push(index_); |
| 5367 | __ push(index_); // Consumed by runtime conversion function. |
| 5368 | if (index_flags_ == STRING_INDEX_IS_NUMBER) { |
| 5369 | __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero, 1); |
| 5370 | } else { |
| 5371 | ASSERT(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); |
| 5372 | // NumberToSmi discards numbers that are not exact integers. |
| 5373 | __ CallRuntime(Runtime::kNumberToSmi, 1); |
| 5374 | } |
| 5375 | if (!scratch_.is(eax)) { |
| 5376 | // Save the conversion result before the pop instructions below |
| 5377 | // have a chance to overwrite it. |
| 5378 | __ mov(scratch_, eax); |
| 5379 | } |
| 5380 | __ pop(index_); |
| 5381 | __ pop(object_); |
| 5382 | // Reload the instance type. |
| 5383 | __ mov(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 5384 | __ movzx_b(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| 5385 | call_helper.AfterCall(masm); |
| 5386 | // If index is still not a smi, it must be out of range. |
| 5387 | STATIC_ASSERT(kSmiTag == 0); |
| 5388 | __ test(scratch_, Immediate(kSmiTagMask)); |
| 5389 | __ j(not_zero, index_out_of_range_); |
| 5390 | // Otherwise, return to the fast path. |
| 5391 | __ jmp(&got_smi_index_); |
| 5392 | |
| 5393 | // Call runtime. We get here when the receiver is a string and the |
| 5394 | // index is a number, but the code of getting the actual character |
| 5395 | // is too complex (e.g., when the string needs to be flattened). |
| 5396 | __ bind(&call_runtime_); |
| 5397 | call_helper.BeforeCall(masm); |
| 5398 | __ push(object_); |
| 5399 | __ push(index_); |
| 5400 | __ CallRuntime(Runtime::kStringCharCodeAt, 2); |
| 5401 | if (!result_.is(eax)) { |
| 5402 | __ mov(result_, eax); |
| 5403 | } |
| 5404 | call_helper.AfterCall(masm); |
| 5405 | __ jmp(&exit_); |
| 5406 | |
| 5407 | __ Abort("Unexpected fallthrough from CharCodeAt slow case"); |
| 5408 | } |
| 5409 | |
| 5410 | |
| 5411 | // ------------------------------------------------------------------------- |
| 5412 | // StringCharFromCodeGenerator |
| 5413 | |
| 5414 | void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
| 5415 | // Fast case of Heap::LookupSingleCharacterStringFromCode. |
| 5416 | STATIC_ASSERT(kSmiTag == 0); |
| 5417 | STATIC_ASSERT(kSmiShiftSize == 0); |
| 5418 | ASSERT(IsPowerOf2(String::kMaxAsciiCharCode + 1)); |
| 5419 | __ test(code_, |
| 5420 | Immediate(kSmiTagMask | |
| 5421 | ((~String::kMaxAsciiCharCode) << kSmiTagSize))); |
| 5422 | __ j(not_zero, &slow_case_, not_taken); |
| 5423 | |
| 5424 | __ Set(result_, Immediate(Factory::single_character_string_cache())); |
| 5425 | STATIC_ASSERT(kSmiTag == 0); |
| 5426 | STATIC_ASSERT(kSmiTagSize == 1); |
| 5427 | STATIC_ASSERT(kSmiShiftSize == 0); |
| 5428 | // At this point code register contains smi tagged ascii char code. |
| 5429 | __ mov(result_, FieldOperand(result_, |
| 5430 | code_, times_half_pointer_size, |
| 5431 | FixedArray::kHeaderSize)); |
| 5432 | __ cmp(result_, Factory::undefined_value()); |
| 5433 | __ j(equal, &slow_case_, not_taken); |
| 5434 | __ bind(&exit_); |
| 5435 | } |
| 5436 | |
| 5437 | |
| 5438 | void StringCharFromCodeGenerator::GenerateSlow( |
| 5439 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 5440 | __ Abort("Unexpected fallthrough to CharFromCode slow case"); |
| 5441 | |
| 5442 | __ bind(&slow_case_); |
| 5443 | call_helper.BeforeCall(masm); |
| 5444 | __ push(code_); |
| 5445 | __ CallRuntime(Runtime::kCharFromCode, 1); |
| 5446 | if (!result_.is(eax)) { |
| 5447 | __ mov(result_, eax); |
| 5448 | } |
| 5449 | call_helper.AfterCall(masm); |
| 5450 | __ jmp(&exit_); |
| 5451 | |
| 5452 | __ Abort("Unexpected fallthrough from CharFromCode slow case"); |
| 5453 | } |
| 5454 | |
| 5455 | |
| 5456 | // ------------------------------------------------------------------------- |
| 5457 | // StringCharAtGenerator |
| 5458 | |
| 5459 | void StringCharAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 5460 | char_code_at_generator_.GenerateFast(masm); |
| 5461 | char_from_code_generator_.GenerateFast(masm); |
| 5462 | } |
| 5463 | |
| 5464 | |
| 5465 | void StringCharAtGenerator::GenerateSlow( |
| 5466 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 5467 | char_code_at_generator_.GenerateSlow(masm, call_helper); |
| 5468 | char_from_code_generator_.GenerateSlow(masm, call_helper); |
| 5469 | } |
| 5470 | |
| 5471 | |
| 5472 | void StringAddStub::Generate(MacroAssembler* masm) { |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 5473 | Label string_add_runtime, call_builtin; |
| 5474 | Builtins::JavaScript builtin_id = Builtins::ADD; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5475 | |
| 5476 | // Load the two arguments. |
| 5477 | __ mov(eax, Operand(esp, 2 * kPointerSize)); // First argument. |
| 5478 | __ mov(edx, Operand(esp, 1 * kPointerSize)); // Second argument. |
| 5479 | |
| 5480 | // Make sure that both arguments are strings if not known in advance. |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 5481 | if (flags_ == NO_STRING_ADD_FLAGS) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5482 | __ test(eax, Immediate(kSmiTagMask)); |
| 5483 | __ j(zero, &string_add_runtime); |
| 5484 | __ CmpObjectType(eax, FIRST_NONSTRING_TYPE, ebx); |
| 5485 | __ j(above_equal, &string_add_runtime); |
| 5486 | |
| 5487 | // First argument is a a string, test second. |
| 5488 | __ test(edx, Immediate(kSmiTagMask)); |
| 5489 | __ j(zero, &string_add_runtime); |
| 5490 | __ CmpObjectType(edx, FIRST_NONSTRING_TYPE, ebx); |
| 5491 | __ j(above_equal, &string_add_runtime); |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 5492 | } else { |
| 5493 | // Here at least one of the arguments is definitely a string. |
| 5494 | // We convert the one that is not known to be a string. |
| 5495 | if ((flags_ & NO_STRING_CHECK_LEFT_IN_STUB) == 0) { |
| 5496 | ASSERT((flags_ & NO_STRING_CHECK_RIGHT_IN_STUB) != 0); |
| 5497 | GenerateConvertArgument(masm, 2 * kPointerSize, eax, ebx, ecx, edi, |
| 5498 | &call_builtin); |
| 5499 | builtin_id = Builtins::STRING_ADD_RIGHT; |
| 5500 | } else if ((flags_ & NO_STRING_CHECK_RIGHT_IN_STUB) == 0) { |
| 5501 | ASSERT((flags_ & NO_STRING_CHECK_LEFT_IN_STUB) != 0); |
| 5502 | GenerateConvertArgument(masm, 1 * kPointerSize, edx, ebx, ecx, edi, |
| 5503 | &call_builtin); |
| 5504 | builtin_id = Builtins::STRING_ADD_LEFT; |
| 5505 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5506 | } |
| 5507 | |
| 5508 | // Both arguments are strings. |
| 5509 | // eax: first string |
| 5510 | // edx: second string |
| 5511 | // Check if either of the strings are empty. In that case return the other. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 5512 | NearLabel second_not_zero_length, both_not_zero_length; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5513 | __ mov(ecx, FieldOperand(edx, String::kLengthOffset)); |
| 5514 | STATIC_ASSERT(kSmiTag == 0); |
| 5515 | __ test(ecx, Operand(ecx)); |
| 5516 | __ j(not_zero, &second_not_zero_length); |
| 5517 | // Second string is empty, result is first string which is already in eax. |
| 5518 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 5519 | __ ret(2 * kPointerSize); |
| 5520 | __ bind(&second_not_zero_length); |
| 5521 | __ mov(ebx, FieldOperand(eax, String::kLengthOffset)); |
| 5522 | STATIC_ASSERT(kSmiTag == 0); |
| 5523 | __ test(ebx, Operand(ebx)); |
| 5524 | __ j(not_zero, &both_not_zero_length); |
| 5525 | // First string is empty, result is second string which is in edx. |
| 5526 | __ mov(eax, edx); |
| 5527 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 5528 | __ ret(2 * kPointerSize); |
| 5529 | |
| 5530 | // Both strings are non-empty. |
| 5531 | // eax: first string |
| 5532 | // ebx: length of first string as a smi |
| 5533 | // ecx: length of second string as a smi |
| 5534 | // edx: second string |
| 5535 | // Look at the length of the result of adding the two strings. |
| 5536 | Label string_add_flat_result, longer_than_two; |
| 5537 | __ bind(&both_not_zero_length); |
| 5538 | __ add(ebx, Operand(ecx)); |
| 5539 | STATIC_ASSERT(Smi::kMaxValue == String::kMaxLength); |
| 5540 | // Handle exceptionally long strings in the runtime system. |
| 5541 | __ j(overflow, &string_add_runtime); |
| 5542 | // Use the runtime system when adding two one character strings, as it |
| 5543 | // contains optimizations for this specific case using the symbol table. |
| 5544 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(2))); |
| 5545 | __ j(not_equal, &longer_than_two); |
| 5546 | |
| 5547 | // Check that both strings are non-external ascii strings. |
| 5548 | __ JumpIfNotBothSequentialAsciiStrings(eax, edx, ebx, ecx, |
| 5549 | &string_add_runtime); |
| 5550 | |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 5551 | // Get the two characters forming the new string. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5552 | __ movzx_b(ebx, FieldOperand(eax, SeqAsciiString::kHeaderSize)); |
| 5553 | __ movzx_b(ecx, FieldOperand(edx, SeqAsciiString::kHeaderSize)); |
| 5554 | |
| 5555 | // Try to lookup two character string in symbol table. If it is not found |
| 5556 | // just allocate a new one. |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 5557 | Label make_two_character_string, make_two_character_string_no_reload; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5558 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 5559 | masm, ebx, ecx, eax, edx, edi, |
| 5560 | &make_two_character_string_no_reload, &make_two_character_string); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5561 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 5562 | __ ret(2 * kPointerSize); |
| 5563 | |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 5564 | // Allocate a two character string. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5565 | __ bind(&make_two_character_string); |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 5566 | // Reload the arguments. |
| 5567 | __ mov(eax, Operand(esp, 2 * kPointerSize)); // First argument. |
| 5568 | __ mov(edx, Operand(esp, 1 * kPointerSize)); // Second argument. |
| 5569 | // Get the two characters forming the new string. |
| 5570 | __ movzx_b(ebx, FieldOperand(eax, SeqAsciiString::kHeaderSize)); |
| 5571 | __ movzx_b(ecx, FieldOperand(edx, SeqAsciiString::kHeaderSize)); |
| 5572 | __ bind(&make_two_character_string_no_reload); |
| 5573 | __ IncrementCounter(&Counters::string_add_make_two_char, 1); |
| 5574 | __ AllocateAsciiString(eax, // Result. |
| 5575 | 2, // Length. |
| 5576 | edi, // Scratch 1. |
| 5577 | edx, // Scratch 2. |
| 5578 | &string_add_runtime); |
| 5579 | // Pack both characters in ebx. |
| 5580 | __ shl(ecx, kBitsPerByte); |
| 5581 | __ or_(ebx, Operand(ecx)); |
| 5582 | // Set the characters in the new string. |
| 5583 | __ mov_w(FieldOperand(eax, SeqAsciiString::kHeaderSize), ebx); |
| 5584 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 5585 | __ ret(2 * kPointerSize); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5586 | |
| 5587 | __ bind(&longer_than_two); |
| 5588 | // Check if resulting string will be flat. |
| 5589 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(String::kMinNonFlatLength))); |
| 5590 | __ j(below, &string_add_flat_result); |
| 5591 | |
| 5592 | // If result is not supposed to be flat allocate a cons string object. If both |
| 5593 | // strings are ascii the result is an ascii cons string. |
| 5594 | Label non_ascii, allocated, ascii_data; |
| 5595 | __ mov(edi, FieldOperand(eax, HeapObject::kMapOffset)); |
| 5596 | __ movzx_b(ecx, FieldOperand(edi, Map::kInstanceTypeOffset)); |
| 5597 | __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset)); |
| 5598 | __ movzx_b(edi, FieldOperand(edi, Map::kInstanceTypeOffset)); |
| 5599 | __ and_(ecx, Operand(edi)); |
| 5600 | STATIC_ASSERT(kStringEncodingMask == kAsciiStringTag); |
| 5601 | __ test(ecx, Immediate(kAsciiStringTag)); |
| 5602 | __ j(zero, &non_ascii); |
| 5603 | __ bind(&ascii_data); |
| 5604 | // Allocate an acsii cons string. |
| 5605 | __ AllocateAsciiConsString(ecx, edi, no_reg, &string_add_runtime); |
| 5606 | __ bind(&allocated); |
| 5607 | // Fill the fields of the cons string. |
| 5608 | if (FLAG_debug_code) __ AbortIfNotSmi(ebx); |
| 5609 | __ mov(FieldOperand(ecx, ConsString::kLengthOffset), ebx); |
| 5610 | __ mov(FieldOperand(ecx, ConsString::kHashFieldOffset), |
| 5611 | Immediate(String::kEmptyHashField)); |
| 5612 | __ mov(FieldOperand(ecx, ConsString::kFirstOffset), eax); |
| 5613 | __ mov(FieldOperand(ecx, ConsString::kSecondOffset), edx); |
| 5614 | __ mov(eax, ecx); |
| 5615 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 5616 | __ ret(2 * kPointerSize); |
| 5617 | __ bind(&non_ascii); |
| 5618 | // At least one of the strings is two-byte. Check whether it happens |
| 5619 | // to contain only ascii characters. |
| 5620 | // ecx: first instance type AND second instance type. |
| 5621 | // edi: second instance type. |
| 5622 | __ test(ecx, Immediate(kAsciiDataHintMask)); |
| 5623 | __ j(not_zero, &ascii_data); |
| 5624 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 5625 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 5626 | __ xor_(edi, Operand(ecx)); |
| 5627 | STATIC_ASSERT(kAsciiStringTag != 0 && kAsciiDataHintTag != 0); |
| 5628 | __ and_(edi, kAsciiStringTag | kAsciiDataHintTag); |
| 5629 | __ cmp(edi, kAsciiStringTag | kAsciiDataHintTag); |
| 5630 | __ j(equal, &ascii_data); |
| 5631 | // Allocate a two byte cons string. |
| 5632 | __ AllocateConsString(ecx, edi, no_reg, &string_add_runtime); |
| 5633 | __ jmp(&allocated); |
| 5634 | |
| 5635 | // Handle creating a flat result. First check that both strings are not |
| 5636 | // external strings. |
| 5637 | // eax: first string |
| 5638 | // ebx: length of resulting flat string as a smi |
| 5639 | // edx: second string |
| 5640 | __ bind(&string_add_flat_result); |
| 5641 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 5642 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 5643 | __ and_(ecx, kStringRepresentationMask); |
| 5644 | __ cmp(ecx, kExternalStringTag); |
| 5645 | __ j(equal, &string_add_runtime); |
| 5646 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 5647 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 5648 | __ and_(ecx, kStringRepresentationMask); |
| 5649 | __ cmp(ecx, kExternalStringTag); |
| 5650 | __ j(equal, &string_add_runtime); |
| 5651 | // Now check if both strings are ascii strings. |
| 5652 | // eax: first string |
| 5653 | // ebx: length of resulting flat string as a smi |
| 5654 | // edx: second string |
| 5655 | Label non_ascii_string_add_flat_result; |
| 5656 | STATIC_ASSERT(kStringEncodingMask == kAsciiStringTag); |
| 5657 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 5658 | __ test_b(FieldOperand(ecx, Map::kInstanceTypeOffset), kAsciiStringTag); |
| 5659 | __ j(zero, &non_ascii_string_add_flat_result); |
| 5660 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 5661 | __ test_b(FieldOperand(ecx, Map::kInstanceTypeOffset), kAsciiStringTag); |
| 5662 | __ j(zero, &string_add_runtime); |
| 5663 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5664 | // Both strings are ascii strings. As they are short they are both flat. |
| 5665 | // ebx: length of resulting flat string as a smi |
| 5666 | __ SmiUntag(ebx); |
| 5667 | __ AllocateAsciiString(eax, ebx, ecx, edx, edi, &string_add_runtime); |
| 5668 | // eax: result string |
| 5669 | __ mov(ecx, eax); |
| 5670 | // Locate first character of result. |
| 5671 | __ add(Operand(ecx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5672 | // Load first argument and locate first character. |
| 5673 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 5674 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
| 5675 | __ SmiUntag(edi); |
| 5676 | __ add(Operand(edx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5677 | // eax: result string |
| 5678 | // ecx: first character of result |
| 5679 | // edx: first char of first argument |
| 5680 | // edi: length of first argument |
| 5681 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, true); |
| 5682 | // Load second argument and locate first character. |
| 5683 | __ mov(edx, Operand(esp, 1 * kPointerSize)); |
| 5684 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
| 5685 | __ SmiUntag(edi); |
| 5686 | __ add(Operand(edx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5687 | // eax: result string |
| 5688 | // ecx: next character of result |
| 5689 | // edx: first char of second argument |
| 5690 | // edi: length of second argument |
| 5691 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, true); |
| 5692 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 5693 | __ ret(2 * kPointerSize); |
| 5694 | |
| 5695 | // Handle creating a flat two byte result. |
| 5696 | // eax: first string - known to be two byte |
| 5697 | // ebx: length of resulting flat string as a smi |
| 5698 | // edx: second string |
| 5699 | __ bind(&non_ascii_string_add_flat_result); |
| 5700 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 5701 | __ test_b(FieldOperand(ecx, Map::kInstanceTypeOffset), kAsciiStringTag); |
| 5702 | __ j(not_zero, &string_add_runtime); |
| 5703 | // Both strings are two byte strings. As they are short they are both |
| 5704 | // flat. |
| 5705 | __ SmiUntag(ebx); |
| 5706 | __ AllocateTwoByteString(eax, ebx, ecx, edx, edi, &string_add_runtime); |
| 5707 | // eax: result string |
| 5708 | __ mov(ecx, eax); |
| 5709 | // Locate first character of result. |
| 5710 | __ add(Operand(ecx), |
| 5711 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 5712 | // Load first argument and locate first character. |
| 5713 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 5714 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
| 5715 | __ SmiUntag(edi); |
| 5716 | __ add(Operand(edx), |
| 5717 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 5718 | // eax: result string |
| 5719 | // ecx: first character of result |
| 5720 | // edx: first char of first argument |
| 5721 | // edi: length of first argument |
| 5722 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, false); |
| 5723 | // Load second argument and locate first character. |
| 5724 | __ mov(edx, Operand(esp, 1 * kPointerSize)); |
| 5725 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
| 5726 | __ SmiUntag(edi); |
| 5727 | __ add(Operand(edx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5728 | // eax: result string |
| 5729 | // ecx: next character of result |
| 5730 | // edx: first char of second argument |
| 5731 | // edi: length of second argument |
| 5732 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, false); |
| 5733 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 5734 | __ ret(2 * kPointerSize); |
| 5735 | |
| 5736 | // Just jump to runtime to add the two strings. |
| 5737 | __ bind(&string_add_runtime); |
| 5738 | __ TailCallRuntime(Runtime::kStringAdd, 2, 1); |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 5739 | |
| 5740 | if (call_builtin.is_linked()) { |
| 5741 | __ bind(&call_builtin); |
| 5742 | __ InvokeBuiltin(builtin_id, JUMP_FUNCTION); |
| 5743 | } |
| 5744 | } |
| 5745 | |
| 5746 | |
| 5747 | void StringAddStub::GenerateConvertArgument(MacroAssembler* masm, |
| 5748 | int stack_offset, |
| 5749 | Register arg, |
| 5750 | Register scratch1, |
| 5751 | Register scratch2, |
| 5752 | Register scratch3, |
| 5753 | Label* slow) { |
| 5754 | // First check if the argument is already a string. |
| 5755 | Label not_string, done; |
| 5756 | __ test(arg, Immediate(kSmiTagMask)); |
| 5757 | __ j(zero, ¬_string); |
| 5758 | __ CmpObjectType(arg, FIRST_NONSTRING_TYPE, scratch1); |
| 5759 | __ j(below, &done); |
| 5760 | |
| 5761 | // Check the number to string cache. |
| 5762 | Label not_cached; |
| 5763 | __ bind(¬_string); |
| 5764 | // Puts the cached result into scratch1. |
| 5765 | NumberToStringStub::GenerateLookupNumberStringCache(masm, |
| 5766 | arg, |
| 5767 | scratch1, |
| 5768 | scratch2, |
| 5769 | scratch3, |
| 5770 | false, |
| 5771 | ¬_cached); |
| 5772 | __ mov(arg, scratch1); |
| 5773 | __ mov(Operand(esp, stack_offset), arg); |
| 5774 | __ jmp(&done); |
| 5775 | |
| 5776 | // Check if the argument is a safe string wrapper. |
| 5777 | __ bind(¬_cached); |
| 5778 | __ test(arg, Immediate(kSmiTagMask)); |
| 5779 | __ j(zero, slow); |
| 5780 | __ CmpObjectType(arg, JS_VALUE_TYPE, scratch1); // map -> scratch1. |
| 5781 | __ j(not_equal, slow); |
| 5782 | __ test_b(FieldOperand(scratch1, Map::kBitField2Offset), |
| 5783 | 1 << Map::kStringWrapperSafeForDefaultValueOf); |
| 5784 | __ j(zero, slow); |
| 5785 | __ mov(arg, FieldOperand(arg, JSValue::kValueOffset)); |
| 5786 | __ mov(Operand(esp, stack_offset), arg); |
| 5787 | |
| 5788 | __ bind(&done); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5789 | } |
| 5790 | |
| 5791 | |
| 5792 | void StringHelper::GenerateCopyCharacters(MacroAssembler* masm, |
| 5793 | Register dest, |
| 5794 | Register src, |
| 5795 | Register count, |
| 5796 | Register scratch, |
| 5797 | bool ascii) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 5798 | NearLabel loop; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5799 | __ bind(&loop); |
| 5800 | // This loop just copies one character at a time, as it is only used for very |
| 5801 | // short strings. |
| 5802 | if (ascii) { |
| 5803 | __ mov_b(scratch, Operand(src, 0)); |
| 5804 | __ mov_b(Operand(dest, 0), scratch); |
| 5805 | __ add(Operand(src), Immediate(1)); |
| 5806 | __ add(Operand(dest), Immediate(1)); |
| 5807 | } else { |
| 5808 | __ mov_w(scratch, Operand(src, 0)); |
| 5809 | __ mov_w(Operand(dest, 0), scratch); |
| 5810 | __ add(Operand(src), Immediate(2)); |
| 5811 | __ add(Operand(dest), Immediate(2)); |
| 5812 | } |
| 5813 | __ sub(Operand(count), Immediate(1)); |
| 5814 | __ j(not_zero, &loop); |
| 5815 | } |
| 5816 | |
| 5817 | |
| 5818 | void StringHelper::GenerateCopyCharactersREP(MacroAssembler* masm, |
| 5819 | Register dest, |
| 5820 | Register src, |
| 5821 | Register count, |
| 5822 | Register scratch, |
| 5823 | bool ascii) { |
| 5824 | // Copy characters using rep movs of doublewords. |
| 5825 | // The destination is aligned on a 4 byte boundary because we are |
| 5826 | // copying to the beginning of a newly allocated string. |
| 5827 | ASSERT(dest.is(edi)); // rep movs destination |
| 5828 | ASSERT(src.is(esi)); // rep movs source |
| 5829 | ASSERT(count.is(ecx)); // rep movs count |
| 5830 | ASSERT(!scratch.is(dest)); |
| 5831 | ASSERT(!scratch.is(src)); |
| 5832 | ASSERT(!scratch.is(count)); |
| 5833 | |
| 5834 | // Nothing to do for zero characters. |
| 5835 | Label done; |
| 5836 | __ test(count, Operand(count)); |
| 5837 | __ j(zero, &done); |
| 5838 | |
| 5839 | // Make count the number of bytes to copy. |
| 5840 | if (!ascii) { |
| 5841 | __ shl(count, 1); |
| 5842 | } |
| 5843 | |
| 5844 | // Don't enter the rep movs if there are less than 4 bytes to copy. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 5845 | NearLabel last_bytes; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5846 | __ test(count, Immediate(~3)); |
| 5847 | __ j(zero, &last_bytes); |
| 5848 | |
| 5849 | // Copy from edi to esi using rep movs instruction. |
| 5850 | __ mov(scratch, count); |
| 5851 | __ sar(count, 2); // Number of doublewords to copy. |
| 5852 | __ cld(); |
| 5853 | __ rep_movs(); |
| 5854 | |
| 5855 | // Find number of bytes left. |
| 5856 | __ mov(count, scratch); |
| 5857 | __ and_(count, 3); |
| 5858 | |
| 5859 | // Check if there are more bytes to copy. |
| 5860 | __ bind(&last_bytes); |
| 5861 | __ test(count, Operand(count)); |
| 5862 | __ j(zero, &done); |
| 5863 | |
| 5864 | // Copy remaining characters. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 5865 | NearLabel loop; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5866 | __ bind(&loop); |
| 5867 | __ mov_b(scratch, Operand(src, 0)); |
| 5868 | __ mov_b(Operand(dest, 0), scratch); |
| 5869 | __ add(Operand(src), Immediate(1)); |
| 5870 | __ add(Operand(dest), Immediate(1)); |
| 5871 | __ sub(Operand(count), Immediate(1)); |
| 5872 | __ j(not_zero, &loop); |
| 5873 | |
| 5874 | __ bind(&done); |
| 5875 | } |
| 5876 | |
| 5877 | |
| 5878 | void StringHelper::GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm, |
| 5879 | Register c1, |
| 5880 | Register c2, |
| 5881 | Register scratch1, |
| 5882 | Register scratch2, |
| 5883 | Register scratch3, |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 5884 | Label* not_probed, |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5885 | Label* not_found) { |
| 5886 | // Register scratch3 is the general scratch register in this function. |
| 5887 | Register scratch = scratch3; |
| 5888 | |
| 5889 | // Make sure that both characters are not digits as such strings has a |
| 5890 | // different hash algorithm. Don't try to look for these in the symbol table. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 5891 | NearLabel not_array_index; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5892 | __ mov(scratch, c1); |
| 5893 | __ sub(Operand(scratch), Immediate(static_cast<int>('0'))); |
| 5894 | __ cmp(Operand(scratch), Immediate(static_cast<int>('9' - '0'))); |
| 5895 | __ j(above, ¬_array_index); |
| 5896 | __ mov(scratch, c2); |
| 5897 | __ sub(Operand(scratch), Immediate(static_cast<int>('0'))); |
| 5898 | __ cmp(Operand(scratch), Immediate(static_cast<int>('9' - '0'))); |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 5899 | __ j(below_equal, not_probed); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 5900 | |
| 5901 | __ bind(¬_array_index); |
| 5902 | // Calculate the two character string hash. |
| 5903 | Register hash = scratch1; |
| 5904 | GenerateHashInit(masm, hash, c1, scratch); |
| 5905 | GenerateHashAddCharacter(masm, hash, c2, scratch); |
| 5906 | GenerateHashGetHash(masm, hash, scratch); |
| 5907 | |
| 5908 | // Collect the two characters in a register. |
| 5909 | Register chars = c1; |
| 5910 | __ shl(c2, kBitsPerByte); |
| 5911 | __ or_(chars, Operand(c2)); |
| 5912 | |
| 5913 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 5914 | // hash: hash of two character string. |
| 5915 | |
| 5916 | // Load the symbol table. |
| 5917 | Register symbol_table = c2; |
| 5918 | ExternalReference roots_address = ExternalReference::roots_address(); |
| 5919 | __ mov(scratch, Immediate(Heap::kSymbolTableRootIndex)); |
| 5920 | __ mov(symbol_table, |
| 5921 | Operand::StaticArray(scratch, times_pointer_size, roots_address)); |
| 5922 | |
| 5923 | // Calculate capacity mask from the symbol table capacity. |
| 5924 | Register mask = scratch2; |
| 5925 | __ mov(mask, FieldOperand(symbol_table, SymbolTable::kCapacityOffset)); |
| 5926 | __ SmiUntag(mask); |
| 5927 | __ sub(Operand(mask), Immediate(1)); |
| 5928 | |
| 5929 | // Registers |
| 5930 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 5931 | // hash: hash of two character string |
| 5932 | // symbol_table: symbol table |
| 5933 | // mask: capacity mask |
| 5934 | // scratch: - |
| 5935 | |
| 5936 | // Perform a number of probes in the symbol table. |
| 5937 | static const int kProbes = 4; |
| 5938 | Label found_in_symbol_table; |
| 5939 | Label next_probe[kProbes], next_probe_pop_mask[kProbes]; |
| 5940 | for (int i = 0; i < kProbes; i++) { |
| 5941 | // Calculate entry in symbol table. |
| 5942 | __ mov(scratch, hash); |
| 5943 | if (i > 0) { |
| 5944 | __ add(Operand(scratch), Immediate(SymbolTable::GetProbeOffset(i))); |
| 5945 | } |
| 5946 | __ and_(scratch, Operand(mask)); |
| 5947 | |
| 5948 | // Load the entry from the symbol table. |
| 5949 | Register candidate = scratch; // Scratch register contains candidate. |
| 5950 | STATIC_ASSERT(SymbolTable::kEntrySize == 1); |
| 5951 | __ mov(candidate, |
| 5952 | FieldOperand(symbol_table, |
| 5953 | scratch, |
| 5954 | times_pointer_size, |
| 5955 | SymbolTable::kElementsStartOffset)); |
| 5956 | |
| 5957 | // If entry is undefined no string with this hash can be found. |
| 5958 | __ cmp(candidate, Factory::undefined_value()); |
| 5959 | __ j(equal, not_found); |
| 5960 | |
| 5961 | // If length is not 2 the string is not a candidate. |
| 5962 | __ cmp(FieldOperand(candidate, String::kLengthOffset), |
| 5963 | Immediate(Smi::FromInt(2))); |
| 5964 | __ j(not_equal, &next_probe[i]); |
| 5965 | |
| 5966 | // As we are out of registers save the mask on the stack and use that |
| 5967 | // register as a temporary. |
| 5968 | __ push(mask); |
| 5969 | Register temp = mask; |
| 5970 | |
| 5971 | // Check that the candidate is a non-external ascii string. |
| 5972 | __ mov(temp, FieldOperand(candidate, HeapObject::kMapOffset)); |
| 5973 | __ movzx_b(temp, FieldOperand(temp, Map::kInstanceTypeOffset)); |
| 5974 | __ JumpIfInstanceTypeIsNotSequentialAscii( |
| 5975 | temp, temp, &next_probe_pop_mask[i]); |
| 5976 | |
| 5977 | // Check if the two characters match. |
| 5978 | __ mov(temp, FieldOperand(candidate, SeqAsciiString::kHeaderSize)); |
| 5979 | __ and_(temp, 0x0000ffff); |
| 5980 | __ cmp(chars, Operand(temp)); |
| 5981 | __ j(equal, &found_in_symbol_table); |
| 5982 | __ bind(&next_probe_pop_mask[i]); |
| 5983 | __ pop(mask); |
| 5984 | __ bind(&next_probe[i]); |
| 5985 | } |
| 5986 | |
| 5987 | // No matching 2 character string found by probing. |
| 5988 | __ jmp(not_found); |
| 5989 | |
| 5990 | // Scratch register contains result when we fall through to here. |
| 5991 | Register result = scratch; |
| 5992 | __ bind(&found_in_symbol_table); |
| 5993 | __ pop(mask); // Pop saved mask from the stack. |
| 5994 | if (!result.is(eax)) { |
| 5995 | __ mov(eax, result); |
| 5996 | } |
| 5997 | } |
| 5998 | |
| 5999 | |
| 6000 | void StringHelper::GenerateHashInit(MacroAssembler* masm, |
| 6001 | Register hash, |
| 6002 | Register character, |
| 6003 | Register scratch) { |
| 6004 | // hash = character + (character << 10); |
| 6005 | __ mov(hash, character); |
| 6006 | __ shl(hash, 10); |
| 6007 | __ add(hash, Operand(character)); |
| 6008 | // hash ^= hash >> 6; |
| 6009 | __ mov(scratch, hash); |
| 6010 | __ sar(scratch, 6); |
| 6011 | __ xor_(hash, Operand(scratch)); |
| 6012 | } |
| 6013 | |
| 6014 | |
| 6015 | void StringHelper::GenerateHashAddCharacter(MacroAssembler* masm, |
| 6016 | Register hash, |
| 6017 | Register character, |
| 6018 | Register scratch) { |
| 6019 | // hash += character; |
| 6020 | __ add(hash, Operand(character)); |
| 6021 | // hash += hash << 10; |
| 6022 | __ mov(scratch, hash); |
| 6023 | __ shl(scratch, 10); |
| 6024 | __ add(hash, Operand(scratch)); |
| 6025 | // hash ^= hash >> 6; |
| 6026 | __ mov(scratch, hash); |
| 6027 | __ sar(scratch, 6); |
| 6028 | __ xor_(hash, Operand(scratch)); |
| 6029 | } |
| 6030 | |
| 6031 | |
| 6032 | void StringHelper::GenerateHashGetHash(MacroAssembler* masm, |
| 6033 | Register hash, |
| 6034 | Register scratch) { |
| 6035 | // hash += hash << 3; |
| 6036 | __ mov(scratch, hash); |
| 6037 | __ shl(scratch, 3); |
| 6038 | __ add(hash, Operand(scratch)); |
| 6039 | // hash ^= hash >> 11; |
| 6040 | __ mov(scratch, hash); |
| 6041 | __ sar(scratch, 11); |
| 6042 | __ xor_(hash, Operand(scratch)); |
| 6043 | // hash += hash << 15; |
| 6044 | __ mov(scratch, hash); |
| 6045 | __ shl(scratch, 15); |
| 6046 | __ add(hash, Operand(scratch)); |
| 6047 | |
| 6048 | // if (hash == 0) hash = 27; |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 6049 | NearLabel hash_not_zero; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 6050 | __ test(hash, Operand(hash)); |
| 6051 | __ j(not_zero, &hash_not_zero); |
| 6052 | __ mov(hash, Immediate(27)); |
| 6053 | __ bind(&hash_not_zero); |
| 6054 | } |
| 6055 | |
| 6056 | |
| 6057 | void SubStringStub::Generate(MacroAssembler* masm) { |
| 6058 | Label runtime; |
| 6059 | |
| 6060 | // Stack frame on entry. |
| 6061 | // esp[0]: return address |
| 6062 | // esp[4]: to |
| 6063 | // esp[8]: from |
| 6064 | // esp[12]: string |
| 6065 | |
| 6066 | // Make sure first argument is a string. |
| 6067 | __ mov(eax, Operand(esp, 3 * kPointerSize)); |
| 6068 | STATIC_ASSERT(kSmiTag == 0); |
| 6069 | __ test(eax, Immediate(kSmiTagMask)); |
| 6070 | __ j(zero, &runtime); |
| 6071 | Condition is_string = masm->IsObjectStringType(eax, ebx, ebx); |
| 6072 | __ j(NegateCondition(is_string), &runtime); |
| 6073 | |
| 6074 | // eax: string |
| 6075 | // ebx: instance type |
| 6076 | |
| 6077 | // Calculate length of sub string using the smi values. |
| 6078 | Label result_longer_than_two; |
| 6079 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); // To index. |
| 6080 | __ test(ecx, Immediate(kSmiTagMask)); |
| 6081 | __ j(not_zero, &runtime); |
| 6082 | __ mov(edx, Operand(esp, 2 * kPointerSize)); // From index. |
| 6083 | __ test(edx, Immediate(kSmiTagMask)); |
| 6084 | __ j(not_zero, &runtime); |
| 6085 | __ sub(ecx, Operand(edx)); |
| 6086 | __ cmp(ecx, FieldOperand(eax, String::kLengthOffset)); |
| 6087 | Label return_eax; |
| 6088 | __ j(equal, &return_eax); |
| 6089 | // Special handling of sub-strings of length 1 and 2. One character strings |
| 6090 | // are handled in the runtime system (looked up in the single character |
| 6091 | // cache). Two character strings are looked for in the symbol cache. |
| 6092 | __ SmiUntag(ecx); // Result length is no longer smi. |
| 6093 | __ cmp(ecx, 2); |
| 6094 | __ j(greater, &result_longer_than_two); |
| 6095 | __ j(less, &runtime); |
| 6096 | |
| 6097 | // Sub string of length 2 requested. |
| 6098 | // eax: string |
| 6099 | // ebx: instance type |
| 6100 | // ecx: sub string length (value is 2) |
| 6101 | // edx: from index (smi) |
| 6102 | __ JumpIfInstanceTypeIsNotSequentialAscii(ebx, ebx, &runtime); |
| 6103 | |
| 6104 | // Get the two characters forming the sub string. |
| 6105 | __ SmiUntag(edx); // From index is no longer smi. |
| 6106 | __ movzx_b(ebx, FieldOperand(eax, edx, times_1, SeqAsciiString::kHeaderSize)); |
| 6107 | __ movzx_b(ecx, |
| 6108 | FieldOperand(eax, edx, times_1, SeqAsciiString::kHeaderSize + 1)); |
| 6109 | |
| 6110 | // Try to lookup two character string in symbol table. |
| 6111 | Label make_two_character_string; |
| 6112 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 6113 | masm, ebx, ecx, eax, edx, edi, |
| 6114 | &make_two_character_string, &make_two_character_string); |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 6115 | __ ret(3 * kPointerSize); |
| 6116 | |
| 6117 | __ bind(&make_two_character_string); |
| 6118 | // Setup registers for allocating the two character string. |
| 6119 | __ mov(eax, Operand(esp, 3 * kPointerSize)); |
| 6120 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 6121 | __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| 6122 | __ Set(ecx, Immediate(2)); |
| 6123 | |
| 6124 | __ bind(&result_longer_than_two); |
| 6125 | // eax: string |
| 6126 | // ebx: instance type |
| 6127 | // ecx: result string length |
| 6128 | // Check for flat ascii string |
| 6129 | Label non_ascii_flat; |
| 6130 | __ JumpIfInstanceTypeIsNotSequentialAscii(ebx, ebx, &non_ascii_flat); |
| 6131 | |
| 6132 | // Allocate the result. |
| 6133 | __ AllocateAsciiString(eax, ecx, ebx, edx, edi, &runtime); |
| 6134 | |
| 6135 | // eax: result string |
| 6136 | // ecx: result string length |
| 6137 | __ mov(edx, esi); // esi used by following code. |
| 6138 | // Locate first character of result. |
| 6139 | __ mov(edi, eax); |
| 6140 | __ add(Operand(edi), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 6141 | // Load string argument and locate character of sub string start. |
| 6142 | __ mov(esi, Operand(esp, 3 * kPointerSize)); |
| 6143 | __ add(Operand(esi), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 6144 | __ mov(ebx, Operand(esp, 2 * kPointerSize)); // from |
| 6145 | __ SmiUntag(ebx); |
| 6146 | __ add(esi, Operand(ebx)); |
| 6147 | |
| 6148 | // eax: result string |
| 6149 | // ecx: result length |
| 6150 | // edx: original value of esi |
| 6151 | // edi: first character of result |
| 6152 | // esi: character of sub string start |
| 6153 | StringHelper::GenerateCopyCharactersREP(masm, edi, esi, ecx, ebx, true); |
| 6154 | __ mov(esi, edx); // Restore esi. |
| 6155 | __ IncrementCounter(&Counters::sub_string_native, 1); |
| 6156 | __ ret(3 * kPointerSize); |
| 6157 | |
| 6158 | __ bind(&non_ascii_flat); |
| 6159 | // eax: string |
| 6160 | // ebx: instance type & kStringRepresentationMask | kStringEncodingMask |
| 6161 | // ecx: result string length |
| 6162 | // Check for flat two byte string |
| 6163 | __ cmp(ebx, kSeqStringTag | kTwoByteStringTag); |
| 6164 | __ j(not_equal, &runtime); |
| 6165 | |
| 6166 | // Allocate the result. |
| 6167 | __ AllocateTwoByteString(eax, ecx, ebx, edx, edi, &runtime); |
| 6168 | |
| 6169 | // eax: result string |
| 6170 | // ecx: result string length |
| 6171 | __ mov(edx, esi); // esi used by following code. |
| 6172 | // Locate first character of result. |
| 6173 | __ mov(edi, eax); |
| 6174 | __ add(Operand(edi), |
| 6175 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 6176 | // Load string argument and locate character of sub string start. |
| 6177 | __ mov(esi, Operand(esp, 3 * kPointerSize)); |
| 6178 | __ add(Operand(esi), |
| 6179 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 6180 | __ mov(ebx, Operand(esp, 2 * kPointerSize)); // from |
| 6181 | // As from is a smi it is 2 times the value which matches the size of a two |
| 6182 | // byte character. |
| 6183 | STATIC_ASSERT(kSmiTag == 0); |
| 6184 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 6185 | __ add(esi, Operand(ebx)); |
| 6186 | |
| 6187 | // eax: result string |
| 6188 | // ecx: result length |
| 6189 | // edx: original value of esi |
| 6190 | // edi: first character of result |
| 6191 | // esi: character of sub string start |
| 6192 | StringHelper::GenerateCopyCharactersREP(masm, edi, esi, ecx, ebx, false); |
| 6193 | __ mov(esi, edx); // Restore esi. |
| 6194 | |
| 6195 | __ bind(&return_eax); |
| 6196 | __ IncrementCounter(&Counters::sub_string_native, 1); |
| 6197 | __ ret(3 * kPointerSize); |
| 6198 | |
| 6199 | // Just jump to runtime to create the sub string. |
| 6200 | __ bind(&runtime); |
| 6201 | __ TailCallRuntime(Runtime::kSubString, 3, 1); |
| 6202 | } |
| 6203 | |
| 6204 | |
| 6205 | void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm, |
| 6206 | Register left, |
| 6207 | Register right, |
| 6208 | Register scratch1, |
| 6209 | Register scratch2, |
| 6210 | Register scratch3) { |
| 6211 | Label result_not_equal; |
| 6212 | Label result_greater; |
| 6213 | Label compare_lengths; |
| 6214 | |
| 6215 | __ IncrementCounter(&Counters::string_compare_native, 1); |
| 6216 | |
| 6217 | // Find minimum length. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 6218 | NearLabel left_shorter; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 6219 | __ mov(scratch1, FieldOperand(left, String::kLengthOffset)); |
| 6220 | __ mov(scratch3, scratch1); |
| 6221 | __ sub(scratch3, FieldOperand(right, String::kLengthOffset)); |
| 6222 | |
| 6223 | Register length_delta = scratch3; |
| 6224 | |
| 6225 | __ j(less_equal, &left_shorter); |
| 6226 | // Right string is shorter. Change scratch1 to be length of right string. |
| 6227 | __ sub(scratch1, Operand(length_delta)); |
| 6228 | __ bind(&left_shorter); |
| 6229 | |
| 6230 | Register min_length = scratch1; |
| 6231 | |
| 6232 | // If either length is zero, just compare lengths. |
| 6233 | __ test(min_length, Operand(min_length)); |
| 6234 | __ j(zero, &compare_lengths); |
| 6235 | |
| 6236 | // Change index to run from -min_length to -1 by adding min_length |
| 6237 | // to string start. This means that loop ends when index reaches zero, |
| 6238 | // which doesn't need an additional compare. |
| 6239 | __ SmiUntag(min_length); |
| 6240 | __ lea(left, |
| 6241 | FieldOperand(left, |
| 6242 | min_length, times_1, |
| 6243 | SeqAsciiString::kHeaderSize)); |
| 6244 | __ lea(right, |
| 6245 | FieldOperand(right, |
| 6246 | min_length, times_1, |
| 6247 | SeqAsciiString::kHeaderSize)); |
| 6248 | __ neg(min_length); |
| 6249 | |
| 6250 | Register index = min_length; // index = -min_length; |
| 6251 | |
| 6252 | { |
| 6253 | // Compare loop. |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 6254 | NearLabel loop; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 6255 | __ bind(&loop); |
| 6256 | // Compare characters. |
| 6257 | __ mov_b(scratch2, Operand(left, index, times_1, 0)); |
| 6258 | __ cmpb(scratch2, Operand(right, index, times_1, 0)); |
| 6259 | __ j(not_equal, &result_not_equal); |
| 6260 | __ add(Operand(index), Immediate(1)); |
| 6261 | __ j(not_zero, &loop); |
| 6262 | } |
| 6263 | |
| 6264 | // Compare lengths - strings up to min-length are equal. |
| 6265 | __ bind(&compare_lengths); |
| 6266 | __ test(length_delta, Operand(length_delta)); |
| 6267 | __ j(not_zero, &result_not_equal); |
| 6268 | |
| 6269 | // Result is EQUAL. |
| 6270 | STATIC_ASSERT(EQUAL == 0); |
| 6271 | STATIC_ASSERT(kSmiTag == 0); |
| 6272 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 6273 | __ ret(0); |
| 6274 | |
| 6275 | __ bind(&result_not_equal); |
| 6276 | __ j(greater, &result_greater); |
| 6277 | |
| 6278 | // Result is LESS. |
| 6279 | __ Set(eax, Immediate(Smi::FromInt(LESS))); |
| 6280 | __ ret(0); |
| 6281 | |
| 6282 | // Result is GREATER. |
| 6283 | __ bind(&result_greater); |
| 6284 | __ Set(eax, Immediate(Smi::FromInt(GREATER))); |
| 6285 | __ ret(0); |
| 6286 | } |
| 6287 | |
| 6288 | |
| 6289 | void StringCompareStub::Generate(MacroAssembler* masm) { |
| 6290 | Label runtime; |
| 6291 | |
| 6292 | // Stack frame on entry. |
| 6293 | // esp[0]: return address |
| 6294 | // esp[4]: right string |
| 6295 | // esp[8]: left string |
| 6296 | |
| 6297 | __ mov(edx, Operand(esp, 2 * kPointerSize)); // left |
| 6298 | __ mov(eax, Operand(esp, 1 * kPointerSize)); // right |
| 6299 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 6300 | NearLabel not_same; |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 6301 | __ cmp(edx, Operand(eax)); |
| 6302 | __ j(not_equal, ¬_same); |
| 6303 | STATIC_ASSERT(EQUAL == 0); |
| 6304 | STATIC_ASSERT(kSmiTag == 0); |
| 6305 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 6306 | __ IncrementCounter(&Counters::string_compare_native, 1); |
| 6307 | __ ret(2 * kPointerSize); |
| 6308 | |
| 6309 | __ bind(¬_same); |
| 6310 | |
| 6311 | // Check that both objects are sequential ascii strings. |
| 6312 | __ JumpIfNotBothSequentialAsciiStrings(edx, eax, ecx, ebx, &runtime); |
| 6313 | |
| 6314 | // Compare flat ascii strings. |
| 6315 | // Drop arguments from the stack. |
| 6316 | __ pop(ecx); |
| 6317 | __ add(Operand(esp), Immediate(2 * kPointerSize)); |
| 6318 | __ push(ecx); |
| 6319 | GenerateCompareFlatAsciiStrings(masm, edx, eax, ecx, ebx, edi); |
| 6320 | |
| 6321 | // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater) |
| 6322 | // tagged as a small integer. |
| 6323 | __ bind(&runtime); |
| 6324 | __ TailCallRuntime(Runtime::kStringCompare, 2, 1); |
| 6325 | } |
| 6326 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 6327 | |
| 6328 | void StringCharAtStub::Generate(MacroAssembler* masm) { |
| 6329 | // Expects two arguments (object, index) on the stack: |
| 6330 | |
| 6331 | // Stack frame on entry. |
| 6332 | // esp[0]: return address |
| 6333 | // esp[4]: index |
| 6334 | // esp[8]: object |
| 6335 | |
| 6336 | Register object = ebx; |
| 6337 | Register index = eax; |
| 6338 | Register scratch1 = ecx; |
| 6339 | Register scratch2 = edx; |
| 6340 | Register result = eax; |
| 6341 | |
| 6342 | __ pop(scratch1); // Return address. |
| 6343 | __ pop(index); |
| 6344 | __ pop(object); |
| 6345 | __ push(scratch1); |
| 6346 | |
| 6347 | Label need_conversion; |
| 6348 | Label index_out_of_range; |
| 6349 | Label done; |
| 6350 | StringCharAtGenerator generator(object, |
| 6351 | index, |
| 6352 | scratch1, |
| 6353 | scratch2, |
| 6354 | result, |
| 6355 | &need_conversion, |
| 6356 | &need_conversion, |
| 6357 | &index_out_of_range, |
| 6358 | STRING_INDEX_IS_NUMBER); |
| 6359 | generator.GenerateFast(masm); |
| 6360 | __ jmp(&done); |
| 6361 | |
| 6362 | __ bind(&index_out_of_range); |
| 6363 | // When the index is out of range, the spec requires us to return |
| 6364 | // the empty string. |
| 6365 | __ Set(result, Immediate(Factory::empty_string())); |
| 6366 | __ jmp(&done); |
| 6367 | |
| 6368 | __ bind(&need_conversion); |
| 6369 | // Move smi zero into the result register, which will trigger |
| 6370 | // conversion. |
| 6371 | __ Set(result, Immediate(Smi::FromInt(0))); |
| 6372 | __ jmp(&done); |
| 6373 | |
| 6374 | StubRuntimeCallHelper call_helper; |
| 6375 | generator.GenerateSlow(masm, call_helper); |
| 6376 | |
| 6377 | __ bind(&done); |
| 6378 | __ ret(0); |
| 6379 | } |
| 6380 | |
| 6381 | void ICCompareStub::GenerateSmis(MacroAssembler* masm) { |
| 6382 | ASSERT(state_ == CompareIC::SMIS); |
| 6383 | NearLabel miss; |
| 6384 | __ mov(ecx, Operand(edx)); |
| 6385 | __ or_(ecx, Operand(eax)); |
| 6386 | __ test(ecx, Immediate(kSmiTagMask)); |
| 6387 | __ j(not_zero, &miss, not_taken); |
| 6388 | |
| 6389 | if (GetCondition() == equal) { |
| 6390 | // For equality we do not care about the sign of the result. |
| 6391 | __ sub(eax, Operand(edx)); |
| 6392 | } else { |
| 6393 | NearLabel done; |
| 6394 | __ sub(edx, Operand(eax)); |
| 6395 | __ j(no_overflow, &done); |
| 6396 | // Correct sign of result in case of overflow. |
| 6397 | __ not_(edx); |
| 6398 | __ bind(&done); |
| 6399 | __ mov(eax, edx); |
| 6400 | } |
| 6401 | __ ret(0); |
| 6402 | |
| 6403 | __ bind(&miss); |
| 6404 | GenerateMiss(masm); |
| 6405 | } |
| 6406 | |
| 6407 | |
| 6408 | void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) { |
| 6409 | ASSERT(state_ == CompareIC::HEAP_NUMBERS); |
| 6410 | |
| 6411 | NearLabel generic_stub; |
| 6412 | NearLabel unordered; |
| 6413 | NearLabel miss; |
| 6414 | __ mov(ecx, Operand(edx)); |
| 6415 | __ and_(ecx, Operand(eax)); |
| 6416 | __ test(ecx, Immediate(kSmiTagMask)); |
| 6417 | __ j(zero, &generic_stub, not_taken); |
| 6418 | |
| 6419 | __ CmpObjectType(eax, HEAP_NUMBER_TYPE, ecx); |
| 6420 | __ j(not_equal, &miss, not_taken); |
| 6421 | __ CmpObjectType(edx, HEAP_NUMBER_TYPE, ecx); |
| 6422 | __ j(not_equal, &miss, not_taken); |
| 6423 | |
| 6424 | // Inlining the double comparison and falling back to the general compare |
| 6425 | // stub if NaN is involved or SS2 or CMOV is unsupported. |
| 6426 | if (CpuFeatures::IsSupported(SSE2) && CpuFeatures::IsSupported(CMOV)) { |
| 6427 | CpuFeatures::Scope scope1(SSE2); |
| 6428 | CpuFeatures::Scope scope2(CMOV); |
| 6429 | |
| 6430 | // Load left and right operand |
| 6431 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 6432 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 6433 | |
| 6434 | // Compare operands |
| 6435 | __ ucomisd(xmm0, xmm1); |
| 6436 | |
| 6437 | // Don't base result on EFLAGS when a NaN is involved. |
| 6438 | __ j(parity_even, &unordered, not_taken); |
| 6439 | |
| 6440 | // Return a result of -1, 0, or 1, based on EFLAGS. |
| 6441 | // Performing mov, because xor would destroy the flag register. |
| 6442 | __ mov(eax, 0); // equal |
| 6443 | __ mov(ecx, Immediate(Smi::FromInt(1))); |
| 6444 | __ cmov(above, eax, Operand(ecx)); |
| 6445 | __ mov(ecx, Immediate(Smi::FromInt(-1))); |
| 6446 | __ cmov(below, eax, Operand(ecx)); |
| 6447 | __ ret(0); |
| 6448 | |
| 6449 | __ bind(&unordered); |
| 6450 | } |
| 6451 | |
| 6452 | CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS); |
| 6453 | __ bind(&generic_stub); |
| 6454 | __ jmp(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 6455 | |
| 6456 | __ bind(&miss); |
| 6457 | GenerateMiss(masm); |
| 6458 | } |
| 6459 | |
| 6460 | |
| 6461 | void ICCompareStub::GenerateObjects(MacroAssembler* masm) { |
| 6462 | ASSERT(state_ == CompareIC::OBJECTS); |
| 6463 | NearLabel miss; |
| 6464 | __ mov(ecx, Operand(edx)); |
| 6465 | __ and_(ecx, Operand(eax)); |
| 6466 | __ test(ecx, Immediate(kSmiTagMask)); |
| 6467 | __ j(zero, &miss, not_taken); |
| 6468 | |
| 6469 | __ CmpObjectType(eax, JS_OBJECT_TYPE, ecx); |
| 6470 | __ j(not_equal, &miss, not_taken); |
| 6471 | __ CmpObjectType(edx, JS_OBJECT_TYPE, ecx); |
| 6472 | __ j(not_equal, &miss, not_taken); |
| 6473 | |
| 6474 | ASSERT(GetCondition() == equal); |
| 6475 | __ sub(eax, Operand(edx)); |
| 6476 | __ ret(0); |
| 6477 | |
| 6478 | __ bind(&miss); |
| 6479 | GenerateMiss(masm); |
| 6480 | } |
| 6481 | |
| 6482 | |
| 6483 | void ICCompareStub::GenerateMiss(MacroAssembler* masm) { |
| 6484 | // Save the registers. |
| 6485 | __ pop(ecx); |
| 6486 | __ push(edx); |
| 6487 | __ push(eax); |
| 6488 | __ push(ecx); |
| 6489 | |
| 6490 | // Call the runtime system in a fresh internal frame. |
| 6491 | ExternalReference miss = ExternalReference(IC_Utility(IC::kCompareIC_Miss)); |
| 6492 | __ EnterInternalFrame(); |
| 6493 | __ push(edx); |
| 6494 | __ push(eax); |
| 6495 | __ push(Immediate(Smi::FromInt(op_))); |
| 6496 | __ CallExternalReference(miss, 3); |
| 6497 | __ LeaveInternalFrame(); |
| 6498 | |
| 6499 | // Compute the entry point of the rewritten stub. |
| 6500 | __ lea(edi, FieldOperand(eax, Code::kHeaderSize)); |
| 6501 | |
| 6502 | // Restore registers. |
| 6503 | __ pop(ecx); |
| 6504 | __ pop(eax); |
| 6505 | __ pop(edx); |
| 6506 | __ push(ecx); |
| 6507 | |
| 6508 | // Do a tail call to the rewritten stub. |
| 6509 | __ jmp(Operand(edi)); |
| 6510 | } |
| 6511 | |
| 6512 | |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 6513 | #undef __ |
| 6514 | |
| 6515 | } } // namespace v8::internal |
| 6516 | |
| 6517 | #endif // V8_TARGET_ARCH_IA32 |