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Diffstat (limited to 'deps/v8/src/ia32/code-stubs-ia32.h')
-rw-r--r--deps/v8/src/ia32/code-stubs-ia32.h291
1 files changed, 2 insertions, 289 deletions
diff --git a/deps/v8/src/ia32/code-stubs-ia32.h b/deps/v8/src/ia32/code-stubs-ia32.h
index 2a7d316f4..fa255da1f 100644
--- a/deps/v8/src/ia32/code-stubs-ia32.h
+++ b/deps/v8/src/ia32/code-stubs-ia32.h
@@ -1,4 +1,4 @@
-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2010 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
@@ -60,25 +60,6 @@ class TranscendentalCacheStub: public CodeStub {
};
-class StoreBufferOverflowStub: public CodeStub {
- public:
- explicit StoreBufferOverflowStub(SaveFPRegsMode save_fp)
- : save_doubles_(save_fp) { }
-
- void Generate(MacroAssembler* masm);
-
- virtual bool IsPregenerated() { return true; }
- static void GenerateFixedRegStubsAheadOfTime();
- virtual bool SometimesSetsUpAFrame() { return false; }
-
- private:
- SaveFPRegsMode save_doubles_;
-
- Major MajorKey() { return StoreBufferOverflow; }
- int MinorKey() { return (save_doubles_ == kSaveFPRegs) ? 1 : 0; }
-};
-
-
class UnaryOpStub: public CodeStub {
public:
UnaryOpStub(Token::Value op,
@@ -437,8 +418,6 @@ class StringDictionaryLookupStub: public CodeStub {
Register r0,
Register r1);
- virtual bool SometimesSetsUpAFrame() { return false; }
-
private:
static const int kInlinedProbes = 4;
static const int kTotalProbes = 20;
@@ -451,7 +430,7 @@ class StringDictionaryLookupStub: public CodeStub {
StringDictionary::kHeaderSize +
StringDictionary::kElementsStartIndex * kPointerSize;
- Major MajorKey() { return StringDictionaryLookup; }
+ Major MajorKey() { return StringDictionaryNegativeLookup; }
int MinorKey() {
return DictionaryBits::encode(dictionary_.code()) |
@@ -472,272 +451,6 @@ class StringDictionaryLookupStub: public CodeStub {
};
-class RecordWriteStub: public CodeStub {
- public:
- RecordWriteStub(Register object,
- Register value,
- Register address,
- RememberedSetAction remembered_set_action,
- SaveFPRegsMode fp_mode)
- : object_(object),
- value_(value),
- address_(address),
- remembered_set_action_(remembered_set_action),
- save_fp_regs_mode_(fp_mode),
- regs_(object, // An input reg.
- address, // An input reg.
- value) { // One scratch reg.
- }
-
- enum Mode {
- STORE_BUFFER_ONLY,
- INCREMENTAL,
- INCREMENTAL_COMPACTION
- };
-
- virtual bool IsPregenerated();
- static void GenerateFixedRegStubsAheadOfTime();
- virtual bool SometimesSetsUpAFrame() { return false; }
-
- static const byte kTwoByteNopInstruction = 0x3c; // Cmpb al, #imm8.
- static const byte kTwoByteJumpInstruction = 0xeb; // Jmp #imm8.
-
- static const byte kFiveByteNopInstruction = 0x3d; // Cmpl eax, #imm32.
- static const byte kFiveByteJumpInstruction = 0xe9; // Jmp #imm32.
-
- static Mode GetMode(Code* stub) {
- byte first_instruction = stub->instruction_start()[0];
- byte second_instruction = stub->instruction_start()[2];
-
- if (first_instruction == kTwoByteJumpInstruction) {
- return INCREMENTAL;
- }
-
- ASSERT(first_instruction == kTwoByteNopInstruction);
-
- if (second_instruction == kFiveByteJumpInstruction) {
- return INCREMENTAL_COMPACTION;
- }
-
- ASSERT(second_instruction == kFiveByteNopInstruction);
-
- return STORE_BUFFER_ONLY;
- }
-
- static void Patch(Code* stub, Mode mode) {
- switch (mode) {
- case STORE_BUFFER_ONLY:
- ASSERT(GetMode(stub) == INCREMENTAL ||
- GetMode(stub) == INCREMENTAL_COMPACTION);
- stub->instruction_start()[0] = kTwoByteNopInstruction;
- stub->instruction_start()[2] = kFiveByteNopInstruction;
- break;
- case INCREMENTAL:
- ASSERT(GetMode(stub) == STORE_BUFFER_ONLY);
- stub->instruction_start()[0] = kTwoByteJumpInstruction;
- break;
- case INCREMENTAL_COMPACTION:
- ASSERT(GetMode(stub) == STORE_BUFFER_ONLY);
- stub->instruction_start()[0] = kTwoByteNopInstruction;
- stub->instruction_start()[2] = kFiveByteJumpInstruction;
- break;
- }
- ASSERT(GetMode(stub) == mode);
- CPU::FlushICache(stub->instruction_start(), 7);
- }
-
- private:
- // This is a helper class for freeing up 3 scratch registers, where the third
- // is always ecx (needed for shift operations). The input is two registers
- // that must be preserved and one scratch register provided by the caller.
- class RegisterAllocation {
- public:
- RegisterAllocation(Register object,
- Register address,
- Register scratch0)
- : object_orig_(object),
- address_orig_(address),
- scratch0_orig_(scratch0),
- object_(object),
- address_(address),
- scratch0_(scratch0) {
- ASSERT(!AreAliased(scratch0, object, address, no_reg));
- scratch1_ = GetRegThatIsNotEcxOr(object_, address_, scratch0_);
- if (scratch0.is(ecx)) {
- scratch0_ = GetRegThatIsNotEcxOr(object_, address_, scratch1_);
- }
- if (object.is(ecx)) {
- object_ = GetRegThatIsNotEcxOr(address_, scratch0_, scratch1_);
- }
- if (address.is(ecx)) {
- address_ = GetRegThatIsNotEcxOr(object_, scratch0_, scratch1_);
- }
- ASSERT(!AreAliased(scratch0_, object_, address_, ecx));
- }
-
- void Save(MacroAssembler* masm) {
- ASSERT(!address_orig_.is(object_));
- ASSERT(object_.is(object_orig_) || address_.is(address_orig_));
- ASSERT(!AreAliased(object_, address_, scratch1_, scratch0_));
- ASSERT(!AreAliased(object_orig_, address_, scratch1_, scratch0_));
- ASSERT(!AreAliased(object_, address_orig_, scratch1_, scratch0_));
- // We don't have to save scratch0_orig_ because it was given to us as
- // a scratch register. But if we had to switch to a different reg then
- // we should save the new scratch0_.
- if (!scratch0_.is(scratch0_orig_)) masm->push(scratch0_);
- if (!ecx.is(scratch0_orig_) &&
- !ecx.is(object_orig_) &&
- !ecx.is(address_orig_)) {
- masm->push(ecx);
- }
- masm->push(scratch1_);
- if (!address_.is(address_orig_)) {
- masm->push(address_);
- masm->mov(address_, address_orig_);
- }
- if (!object_.is(object_orig_)) {
- masm->push(object_);
- masm->mov(object_, object_orig_);
- }
- }
-
- void Restore(MacroAssembler* masm) {
- // These will have been preserved the entire time, so we just need to move
- // them back. Only in one case is the orig_ reg different from the plain
- // one, since only one of them can alias with ecx.
- if (!object_.is(object_orig_)) {
- masm->mov(object_orig_, object_);
- masm->pop(object_);
- }
- if (!address_.is(address_orig_)) {
- masm->mov(address_orig_, address_);
- masm->pop(address_);
- }
- masm->pop(scratch1_);
- if (!ecx.is(scratch0_orig_) &&
- !ecx.is(object_orig_) &&
- !ecx.is(address_orig_)) {
- masm->pop(ecx);
- }
- if (!scratch0_.is(scratch0_orig_)) masm->pop(scratch0_);
- }
-
- // If we have to call into C then we need to save and restore all caller-
- // saved registers that were not already preserved. The caller saved
- // registers are eax, ecx and edx. The three scratch registers (incl. ecx)
- // will be restored by other means so we don't bother pushing them here.
- void SaveCallerSaveRegisters(MacroAssembler* masm, SaveFPRegsMode mode) {
- if (!scratch0_.is(eax) && !scratch1_.is(eax)) masm->push(eax);
- if (!scratch0_.is(edx) && !scratch1_.is(edx)) masm->push(edx);
- if (mode == kSaveFPRegs) {
- CpuFeatures::Scope scope(SSE2);
- masm->sub(esp,
- Immediate(kDoubleSize * (XMMRegister::kNumRegisters - 1)));
- // Save all XMM registers except XMM0.
- for (int i = XMMRegister::kNumRegisters - 1; i > 0; i--) {
- XMMRegister reg = XMMRegister::from_code(i);
- masm->movdbl(Operand(esp, (i - 1) * kDoubleSize), reg);
- }
- }
- }
-
- inline void RestoreCallerSaveRegisters(MacroAssembler*masm,
- SaveFPRegsMode mode) {
- if (mode == kSaveFPRegs) {
- CpuFeatures::Scope scope(SSE2);
- // Restore all XMM registers except XMM0.
- for (int i = XMMRegister::kNumRegisters - 1; i > 0; i--) {
- XMMRegister reg = XMMRegister::from_code(i);
- masm->movdbl(reg, Operand(esp, (i - 1) * kDoubleSize));
- }
- masm->add(esp,
- Immediate(kDoubleSize * (XMMRegister::kNumRegisters - 1)));
- }
- if (!scratch0_.is(edx) && !scratch1_.is(edx)) masm->pop(edx);
- if (!scratch0_.is(eax) && !scratch1_.is(eax)) masm->pop(eax);
- }
-
- inline Register object() { return object_; }
- inline Register address() { return address_; }
- inline Register scratch0() { return scratch0_; }
- inline Register scratch1() { return scratch1_; }
-
- private:
- Register object_orig_;
- Register address_orig_;
- Register scratch0_orig_;
- Register object_;
- Register address_;
- Register scratch0_;
- Register scratch1_;
- // Third scratch register is always ecx.
-
- Register GetRegThatIsNotEcxOr(Register r1,
- Register r2,
- Register r3) {
- for (int i = 0; i < Register::kNumAllocatableRegisters; i++) {
- Register candidate = Register::FromAllocationIndex(i);
- if (candidate.is(ecx)) continue;
- if (candidate.is(r1)) continue;
- if (candidate.is(r2)) continue;
- if (candidate.is(r3)) continue;
- return candidate;
- }
- UNREACHABLE();
- return no_reg;
- }
- friend class RecordWriteStub;
- };
-
- enum OnNoNeedToInformIncrementalMarker {
- kReturnOnNoNeedToInformIncrementalMarker,
- kUpdateRememberedSetOnNoNeedToInformIncrementalMarker
- }
-;
- void Generate(MacroAssembler* masm);
- void GenerateIncremental(MacroAssembler* masm, Mode mode);
- void CheckNeedsToInformIncrementalMarker(
- MacroAssembler* masm,
- OnNoNeedToInformIncrementalMarker on_no_need,
- Mode mode);
- void InformIncrementalMarker(MacroAssembler* masm, Mode mode);
-
- Major MajorKey() { return RecordWrite; }
-
- int MinorKey() {
- return ObjectBits::encode(object_.code()) |
- ValueBits::encode(value_.code()) |
- AddressBits::encode(address_.code()) |
- RememberedSetActionBits::encode(remembered_set_action_) |
- SaveFPRegsModeBits::encode(save_fp_regs_mode_);
- }
-
- bool MustBeInStubCache() {
- // All stubs must be registered in the stub cache
- // otherwise IncrementalMarker would not be able to find
- // and patch it.
- return true;
- }
-
- void Activate(Code* code) {
- code->GetHeap()->incremental_marking()->ActivateGeneratedStub(code);
- }
-
- class ObjectBits: public BitField<int, 0, 3> {};
- class ValueBits: public BitField<int, 3, 3> {};
- class AddressBits: public BitField<int, 6, 3> {};
- class RememberedSetActionBits: public BitField<RememberedSetAction, 9, 1> {};
- class SaveFPRegsModeBits: public BitField<SaveFPRegsMode, 10, 1> {};
-
- Register object_;
- Register value_;
- Register address_;
- RememberedSetAction remembered_set_action_;
- SaveFPRegsMode save_fp_regs_mode_;
- RegisterAllocation regs_;
-};
-
-
} } // namespace v8::internal
#endif // V8_IA32_CODE_STUBS_IA32_H_
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