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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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5278 // Pop FPU stack before deoptimizing. | 5278 // Pop FPU stack before deoptimizing. |
5279 __ fstp(0); | 5279 __ fstp(0); |
5280 DeoptimizeIf(not_zero, env); | 5280 DeoptimizeIf(not_zero, env); |
5281 } | 5281 } |
5282 __ jmp(&done, Label::kNear); | 5282 __ jmp(&done, Label::kNear); |
5283 } else { | 5283 } else { |
5284 ASSERT(mode == NUMBER_CANDIDATE_IS_SMI); | 5284 ASSERT(mode == NUMBER_CANDIDATE_IS_SMI); |
5285 } | 5285 } |
5286 | 5286 |
5287 __ bind(&load_smi); | 5287 __ bind(&load_smi); |
5288 __ SmiUntag(input_reg); // Untag smi before converting to float. | 5288 // Clobbering a temp is faster than re-tagging the |
5289 __ push(input_reg); | 5289 // input register since we avoid dependencies. |
| 5290 __ mov(temp_reg, input_reg); |
| 5291 __ SmiUntag(temp_reg); // Untag smi before converting to float. |
| 5292 __ push(temp_reg); |
5290 __ fild_s(Operand(esp, 0)); | 5293 __ fild_s(Operand(esp, 0)); |
5291 __ pop(input_reg); | 5294 __ add(esp, Immediate(kPointerSize)); |
5292 __ SmiTag(input_reg); // Retag smi. | |
5293 __ bind(&done); | 5295 __ bind(&done); |
5294 X87CommitWrite(res_reg); | 5296 X87CommitWrite(res_reg); |
5295 } | 5297 } |
5296 | 5298 |
5297 | 5299 |
5298 void LCodeGen::EmitNumberUntagD(Register input_reg, | 5300 void LCodeGen::EmitNumberUntagD(Register input_reg, |
5299 Register temp_reg, | 5301 Register temp_reg, |
5300 XMMRegister result_reg, | 5302 XMMRegister result_reg, |
5301 bool can_convert_undefined_to_nan, | 5303 bool can_convert_undefined_to_nan, |
5302 bool deoptimize_on_minus_zero, | 5304 bool deoptimize_on_minus_zero, |
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5338 __ j(not_zero, &done, Label::kNear); | 5340 __ j(not_zero, &done, Label::kNear); |
5339 __ movmskpd(temp_reg, result_reg); | 5341 __ movmskpd(temp_reg, result_reg); |
5340 __ test_b(temp_reg, 1); | 5342 __ test_b(temp_reg, 1); |
5341 DeoptimizeIf(not_zero, env); | 5343 DeoptimizeIf(not_zero, env); |
5342 } | 5344 } |
5343 __ jmp(&done, Label::kNear); | 5345 __ jmp(&done, Label::kNear); |
5344 } else { | 5346 } else { |
5345 ASSERT(mode == NUMBER_CANDIDATE_IS_SMI); | 5347 ASSERT(mode == NUMBER_CANDIDATE_IS_SMI); |
5346 } | 5348 } |
5347 | 5349 |
5348 // Smi to XMM conversion | |
5349 __ bind(&load_smi); | 5350 __ bind(&load_smi); |
5350 __ SmiUntag(input_reg); // Untag smi before converting to float. | 5351 // Smi to XMM conversion. Clobbering a temp is faster than re-tagging the |
5351 __ cvtsi2sd(result_reg, Operand(input_reg)); | 5352 // input register since we avoid dependencies. |
5352 __ SmiTag(input_reg); // Retag smi. | 5353 __ mov(temp_reg, input_reg); |
| 5354 __ SmiUntag(temp_reg); // Untag smi before converting to float. |
| 5355 __ cvtsi2sd(result_reg, Operand(temp_reg)); |
5353 __ bind(&done); | 5356 __ bind(&done); |
5354 } | 5357 } |
5355 | 5358 |
5356 | 5359 |
5357 void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr, Label* done) { | 5360 void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr, Label* done) { |
5358 Register input_reg = ToRegister(instr->value()); | 5361 Register input_reg = ToRegister(instr->value()); |
5359 | 5362 |
5360 | 5363 |
5361 if (instr->truncating()) { | 5364 if (instr->truncating()) { |
5362 Label heap_number, slow_case; | 5365 Label heap_number, slow_case; |
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5416 __ JumpIfNotSmi(input_reg, deferred->entry()); | 5419 __ JumpIfNotSmi(input_reg, deferred->entry()); |
5417 __ SmiUntag(input_reg); | 5420 __ SmiUntag(input_reg); |
5418 __ bind(deferred->exit()); | 5421 __ bind(deferred->exit()); |
5419 } | 5422 } |
5420 | 5423 |
5421 | 5424 |
5422 void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) { | 5425 void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) { |
5423 LOperand* input = instr->value(); | 5426 LOperand* input = instr->value(); |
5424 ASSERT(input->IsRegister()); | 5427 ASSERT(input->IsRegister()); |
5425 LOperand* temp = instr->temp(); | 5428 LOperand* temp = instr->temp(); |
5426 ASSERT(temp == NULL || temp->IsRegister()); | 5429 ASSERT(temp->IsRegister()); |
5427 LOperand* result = instr->result(); | 5430 LOperand* result = instr->result(); |
5428 ASSERT(result->IsDoubleRegister()); | 5431 ASSERT(result->IsDoubleRegister()); |
5429 | 5432 |
5430 Register input_reg = ToRegister(input); | 5433 Register input_reg = ToRegister(input); |
5431 bool deoptimize_on_minus_zero = | 5434 bool deoptimize_on_minus_zero = |
5432 instr->hydrogen()->deoptimize_on_minus_zero(); | 5435 instr->hydrogen()->deoptimize_on_minus_zero(); |
5433 Register temp_reg = deoptimize_on_minus_zero ? ToRegister(temp) : no_reg; | 5436 Register temp_reg = ToRegister(temp); |
5434 | 5437 |
5435 HValue* value = instr->hydrogen()->value(); | 5438 HValue* value = instr->hydrogen()->value(); |
5436 NumberUntagDMode mode = value->representation().IsSmi() | 5439 NumberUntagDMode mode = value->representation().IsSmi() |
5437 ? NUMBER_CANDIDATE_IS_SMI : NUMBER_CANDIDATE_IS_ANY_TAGGED; | 5440 ? NUMBER_CANDIDATE_IS_SMI : NUMBER_CANDIDATE_IS_ANY_TAGGED; |
5438 | 5441 |
5439 if (CpuFeatures::IsSupported(SSE2)) { | 5442 if (CpuFeatures::IsSupported(SSE2)) { |
5440 CpuFeatureScope scope(masm(), SSE2); | 5443 CpuFeatureScope scope(masm(), SSE2); |
5441 XMMRegister result_reg = ToDoubleRegister(result); | 5444 XMMRegister result_reg = ToDoubleRegister(result); |
5442 EmitNumberUntagD(input_reg, | 5445 EmitNumberUntagD(input_reg, |
5443 temp_reg, | 5446 temp_reg, |
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6350 FixedArray::kHeaderSize - kPointerSize)); | 6353 FixedArray::kHeaderSize - kPointerSize)); |
6351 __ bind(&done); | 6354 __ bind(&done); |
6352 } | 6355 } |
6353 | 6356 |
6354 | 6357 |
6355 #undef __ | 6358 #undef __ |
6356 | 6359 |
6357 } } // namespace v8::internal | 6360 } } // namespace v8::internal |
6358 | 6361 |
6359 #endif // V8_TARGET_ARCH_IA32 | 6362 #endif // V8_TARGET_ARCH_IA32 |
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