/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- * vim: set ts=8 sts=4 et sw=4 tw=99: * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef jit_x64_MacroAssembler_x64_h #define jit_x64_MacroAssembler_x64_h #include "jit/JitFrames.h" #include "jit/MoveResolver.h" #include "jit/x86-shared/MacroAssembler-x86-shared.h" namespace js { namespace jit { struct ImmShiftedTag : public ImmWord { explicit ImmShiftedTag(JSValueShiftedTag shtag) : ImmWord((uintptr_t)shtag) { } explicit ImmShiftedTag(JSValueType type) : ImmWord(uintptr_t(JSValueShiftedTag(JSVAL_TYPE_TO_SHIFTED_TAG(type)))) { } }; struct ImmTag : public Imm32 { explicit ImmTag(JSValueTag tag) : Imm32(tag) { } }; class MacroAssemblerX64 : public MacroAssemblerX86Shared { private: // Perform a downcast. Should be removed by Bug 996602. MacroAssembler& asMasm(); const MacroAssembler& asMasm() const; void bindOffsets(const MacroAssemblerX86Shared::UsesVector&); public: using MacroAssemblerX86Shared::load32; using MacroAssemblerX86Shared::store32; using MacroAssemblerX86Shared::store16; MacroAssemblerX64() { } // The buffer is about to be linked, make sure any constant pools or excess // bookkeeping has been flushed to the instruction stream. void finish(); ///////////////////////////////////////////////////////////////// // X64 helpers. ///////////////////////////////////////////////////////////////// void writeDataRelocation(const Value& val) { if (val.isGCThing()) { gc::Cell* cell = val.toGCThing(); if (cell && gc::IsInsideNursery(cell)) embedsNurseryPointers_ = true; dataRelocations_.writeUnsigned(masm.currentOffset()); } } // Refers to the upper 32 bits of a 64-bit Value operand. // On x86_64, the upper 32 bits do not necessarily only contain the type. Operand ToUpper32(Operand base) { switch (base.kind()) { case Operand::MEM_REG_DISP: return Operand(Register::FromCode(base.base()), base.disp() + 4); case Operand::MEM_SCALE: return Operand(Register::FromCode(base.base()), Register::FromCode(base.index()), base.scale(), base.disp() + 4); default: MOZ_CRASH("unexpected operand kind"); } } static inline Operand ToUpper32(const Address& address) { return Operand(address.base, address.offset + 4); } static inline Operand ToUpper32(const BaseIndex& address) { return Operand(address.base, address.index, address.scale, address.offset + 4); } uint32_t Upper32Of(JSValueShiftedTag tag) { union { // Implemented in this way to appease MSVC++. uint64_t tag; struct { uint32_t lo32; uint32_t hi32; } s; } e; e.tag = tag; return e.s.hi32; } JSValueShiftedTag GetShiftedTag(JSValueType type) { return (JSValueShiftedTag)JSVAL_TYPE_TO_SHIFTED_TAG(type); } ///////////////////////////////////////////////////////////////// // X86/X64-common interface. ///////////////////////////////////////////////////////////////// Address ToPayload(Address value) { return value; } void storeValue(ValueOperand val, Operand dest) { movq(val.valueReg(), dest); } void storeValue(ValueOperand val, const Address& dest) { storeValue(val, Operand(dest)); } template <typename T> void storeValue(JSValueType type, Register reg, const T& dest) { // Value types with 32-bit payloads can be emitted as two 32-bit moves. if (type == JSVAL_TYPE_INT32 || type == JSVAL_TYPE_BOOLEAN) { movl(reg, Operand(dest)); movl(Imm32(Upper32Of(GetShiftedTag(type))), ToUpper32(Operand(dest))); } else { ScratchRegisterScope scratch(asMasm()); boxValue(type, reg, scratch); movq(scratch, Operand(dest)); } } template <typename T> void storeValue(const Value& val, const T& dest) { ScratchRegisterScope scratch(asMasm()); if (val.isGCThing()) { movWithPatch(ImmWord(val.asRawBits()), scratch); writeDataRelocation(val); } else { mov(ImmWord(val.asRawBits()), scratch); } movq(scratch, Operand(dest)); } void storeValue(ValueOperand val, BaseIndex dest) { storeValue(val, Operand(dest)); } void storeValue(const Address& src, const Address& dest, Register temp) { loadPtr(src, temp); storePtr(temp, dest); } void loadValue(Operand src, ValueOperand val) { movq(src, val.valueReg()); } void loadValue(Address src, ValueOperand val) { loadValue(Operand(src), val); } void loadValue(const BaseIndex& src, ValueOperand val) { loadValue(Operand(src), val); } void tagValue(JSValueType type, Register payload, ValueOperand dest) { ScratchRegisterScope scratch(asMasm()); MOZ_ASSERT(dest.valueReg() != scratch); if (payload != dest.valueReg()) movq(payload, dest.valueReg()); mov(ImmShiftedTag(type), scratch); orq(scratch, dest.valueReg()); } void pushValue(ValueOperand val) { push(val.valueReg()); } void popValue(ValueOperand val) { pop(val.valueReg()); } void pushValue(const Value& val) { if (val.isGCThing()) { ScratchRegisterScope scratch(asMasm()); movWithPatch(ImmWord(val.asRawBits()), scratch); writeDataRelocation(val); push(scratch); } else { push(ImmWord(val.asRawBits())); } } void pushValue(JSValueType type, Register reg) { ScratchRegisterScope scratch(asMasm()); boxValue(type, reg, scratch); push(scratch); } void pushValue(const Address& addr) { push(Operand(addr)); } void moveValue(const Value& val, Register dest) { movWithPatch(ImmWord(val.asRawBits()), dest); writeDataRelocation(val); } void moveValue(const Value& src, const ValueOperand& dest) { moveValue(src, dest.valueReg()); } void moveValue(const ValueOperand& src, const ValueOperand& dest) { if (src.valueReg() != dest.valueReg()) movq(src.valueReg(), dest.valueReg()); } void boxValue(JSValueType type, Register src, Register dest); Condition testUndefined(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, ImmTag(JSVAL_TAG_UNDEFINED)); return cond; } Condition testInt32(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, ImmTag(JSVAL_TAG_INT32)); return cond; } Condition testBoolean(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, ImmTag(JSVAL_TAG_BOOLEAN)); return cond; } Condition testNull(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, ImmTag(JSVAL_TAG_NULL)); return cond; } Condition testString(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, ImmTag(JSVAL_TAG_STRING)); return cond; } Condition testSymbol(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, ImmTag(JSVAL_TAG_SYMBOL)); return cond; } Condition testObject(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, ImmTag(JSVAL_TAG_OBJECT)); return cond; } Condition testDouble(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, Imm32(JSVAL_TAG_MAX_DOUBLE)); return cond == Equal ? BelowOrEqual : Above; } Condition testNumber(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, Imm32(JSVAL_UPPER_INCL_TAG_OF_NUMBER_SET)); return cond == Equal ? BelowOrEqual : Above; } Condition testGCThing(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, Imm32(JSVAL_LOWER_INCL_TAG_OF_GCTHING_SET)); return cond == Equal ? AboveOrEqual : Below; } Condition testMagic(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, ImmTag(JSVAL_TAG_MAGIC)); return cond; } Condition testError(Condition cond, Register tag) { return testMagic(cond, tag); } Condition testPrimitive(Condition cond, Register tag) { MOZ_ASSERT(cond == Equal || cond == NotEqual); cmp32(tag, ImmTag(JSVAL_UPPER_EXCL_TAG_OF_PRIMITIVE_SET)); return cond == Equal ? Below : AboveOrEqual; } Condition testUndefined(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testUndefined(cond, scratch); } Condition testInt32(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testInt32(cond, scratch); } Condition testBoolean(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testBoolean(cond, scratch); } Condition testDouble(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testDouble(cond, scratch); } Condition testNumber(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testNumber(cond, scratch); } Condition testNull(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testNull(cond, scratch); } Condition testString(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testString(cond, scratch); } Condition testSymbol(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testSymbol(cond, scratch); } Condition testObject(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testObject(cond, scratch); } Condition testGCThing(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testGCThing(cond, scratch); } Condition testPrimitive(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testPrimitive(cond, scratch); } Condition testUndefined(Condition cond, const Address& src) { cmp32(ToUpper32(src), Imm32(Upper32Of(GetShiftedTag(JSVAL_TYPE_UNDEFINED)))); return cond; } Condition testInt32(Condition cond, const Address& src) { cmp32(ToUpper32(src), Imm32(Upper32Of(GetShiftedTag(JSVAL_TYPE_INT32)))); return cond; } Condition testBoolean(Condition cond, const Address& src) { cmp32(ToUpper32(src), Imm32(Upper32Of(GetShiftedTag(JSVAL_TYPE_BOOLEAN)))); return cond; } Condition testDouble(Condition cond, const Address& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testDouble(cond, scratch); } Condition testNumber(Condition cond, const Address& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testNumber(cond, scratch); } Condition testNull(Condition cond, const Address& src) { cmp32(ToUpper32(src), Imm32(Upper32Of(GetShiftedTag(JSVAL_TYPE_NULL)))); return cond; } Condition testString(Condition cond, const Address& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testString(cond, scratch); } Condition testSymbol(Condition cond, const Address& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testSymbol(cond, scratch); } Condition testObject(Condition cond, const Address& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testObject(cond, scratch); } Condition testPrimitive(Condition cond, const Address& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testPrimitive(cond, scratch); } Condition testGCThing(Condition cond, const Address& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testGCThing(cond, scratch); } Condition testMagic(Condition cond, const Address& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testMagic(cond, scratch); } Condition testUndefined(Condition cond, const BaseIndex& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testUndefined(cond, scratch); } Condition testNull(Condition cond, const BaseIndex& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testNull(cond, scratch); } Condition testBoolean(Condition cond, const BaseIndex& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testBoolean(cond, scratch); } Condition testString(Condition cond, const BaseIndex& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testString(cond, scratch); } Condition testSymbol(Condition cond, const BaseIndex& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testSymbol(cond, scratch); } Condition testInt32(Condition cond, const BaseIndex& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testInt32(cond, scratch); } Condition testObject(Condition cond, const BaseIndex& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testObject(cond, scratch); } Condition testDouble(Condition cond, const BaseIndex& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testDouble(cond, scratch); } Condition testMagic(Condition cond, const BaseIndex& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testMagic(cond, scratch); } Condition testGCThing(Condition cond, const BaseIndex& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testGCThing(cond, scratch); } Condition isMagic(Condition cond, const ValueOperand& src, JSWhyMagic why) { uint64_t magic = MagicValue(why).asRawBits(); cmpPtr(src.valueReg(), ImmWord(magic)); return cond; } void cmpPtr(Register lhs, const ImmWord rhs) { ScratchRegisterScope scratch(asMasm()); MOZ_ASSERT(lhs != scratch); if (intptr_t(rhs.value) <= INT32_MAX && intptr_t(rhs.value) >= INT32_MIN) { cmpPtr(lhs, Imm32(int32_t(rhs.value))); } else { movePtr(rhs, scratch); cmpPtr(lhs, scratch); } } void cmpPtr(Register lhs, const ImmPtr rhs) { cmpPtr(lhs, ImmWord(uintptr_t(rhs.value))); } void cmpPtr(Register lhs, const ImmGCPtr rhs) { ScratchRegisterScope scratch(asMasm()); MOZ_ASSERT(lhs != scratch); movePtr(rhs, scratch); cmpPtr(lhs, scratch); } void cmpPtr(Register lhs, const Imm32 rhs) { cmpq(rhs, lhs); } void cmpPtr(const Operand& lhs, const ImmGCPtr rhs) { ScratchRegisterScope scratch(asMasm()); MOZ_ASSERT(!lhs.containsReg(scratch)); movePtr(rhs, scratch); cmpPtr(lhs, scratch); } void cmpPtr(const Operand& lhs, const ImmWord rhs) { if ((intptr_t)rhs.value <= INT32_MAX && (intptr_t)rhs.value >= INT32_MIN) { cmpPtr(lhs, Imm32((int32_t)rhs.value)); } else { ScratchRegisterScope scratch(asMasm()); movePtr(rhs, scratch); cmpPtr(lhs, scratch); } } void cmpPtr(const Operand& lhs, const ImmPtr rhs) { cmpPtr(lhs, ImmWord(uintptr_t(rhs.value))); } void cmpPtr(const Address& lhs, const ImmGCPtr rhs) { cmpPtr(Operand(lhs), rhs); } void cmpPtr(const Address& lhs, const ImmWord rhs) { cmpPtr(Operand(lhs), rhs); } void cmpPtr(const Address& lhs, const ImmPtr rhs) { cmpPtr(lhs, ImmWord(uintptr_t(rhs.value))); } void cmpPtr(const Operand& lhs, Register rhs) { cmpq(rhs, lhs); } void cmpPtr(Register lhs, const Operand& rhs) { cmpq(rhs, lhs); } void cmpPtr(const Operand& lhs, const Imm32 rhs) { cmpq(rhs, lhs); } void cmpPtr(const Address& lhs, Register rhs) { cmpPtr(Operand(lhs), rhs); } void cmpPtr(Register lhs, Register rhs) { cmpq(rhs, lhs); } void testPtr(Register lhs, Register rhs) { testq(rhs, lhs); } void testPtr(Register lhs, Imm32 rhs) { testq(rhs, lhs); } void testPtr(const Operand& lhs, Imm32 rhs) { testq(rhs, lhs); } ///////////////////////////////////////////////////////////////// // Common interface. ///////////////////////////////////////////////////////////////// CodeOffsetJump jumpWithPatch(RepatchLabel* label, Label* documentation = nullptr) { JmpSrc src = jmpSrc(label); return CodeOffsetJump(size(), addPatchableJump(src, Relocation::HARDCODED)); } CodeOffsetJump jumpWithPatch(RepatchLabel* label, Condition cond, Label* documentation = nullptr) { JmpSrc src = jSrc(cond, label); return CodeOffsetJump(size(), addPatchableJump(src, Relocation::HARDCODED)); } CodeOffsetJump backedgeJump(RepatchLabel* label, Label* documentation = nullptr) { return jumpWithPatch(label); } void movePtr(Register src, Register dest) { movq(src, dest); } void movePtr(Register src, const Operand& dest) { movq(src, dest); } void movePtr(ImmWord imm, Register dest) { mov(imm, dest); } void movePtr(ImmPtr imm, Register dest) { mov(imm, dest); } void movePtr(wasm::SymbolicAddress imm, Register dest) { mov(imm, dest); } void movePtr(ImmGCPtr imm, Register dest) { movq(imm, dest); } void loadPtr(AbsoluteAddress address, Register dest) { if (X86Encoding::IsAddressImmediate(address.addr)) { movq(Operand(address), dest); } else { ScratchRegisterScope scratch(asMasm()); mov(ImmPtr(address.addr), scratch); loadPtr(Address(scratch, 0x0), dest); } } void loadPtr(const Address& address, Register dest) { movq(Operand(address), dest); } void loadPtr(const Operand& src, Register dest) { movq(src, dest); } void loadPtr(const BaseIndex& src, Register dest) { movq(Operand(src), dest); } void loadPrivate(const Address& src, Register dest) { loadPtr(src, dest); shlq(Imm32(1), dest); } void load32(AbsoluteAddress address, Register dest) { if (X86Encoding::IsAddressImmediate(address.addr)) { movl(Operand(address), dest); } else { ScratchRegisterScope scratch(asMasm()); mov(ImmPtr(address.addr), scratch); load32(Address(scratch, 0x0), dest); } } void load64(const Address& address, Register64 dest) { movq(Operand(address), dest.reg); } template <typename T> void storePtr(ImmWord imm, T address) { if ((intptr_t)imm.value <= INT32_MAX && (intptr_t)imm.value >= INT32_MIN) { movq(Imm32((int32_t)imm.value), Operand(address)); } else { ScratchRegisterScope scratch(asMasm()); mov(imm, scratch); movq(scratch, Operand(address)); } } template <typename T> void storePtr(ImmPtr imm, T address) { storePtr(ImmWord(uintptr_t(imm.value)), address); } template <typename T> void storePtr(ImmGCPtr imm, T address) { ScratchRegisterScope scratch(asMasm()); movq(imm, scratch); movq(scratch, Operand(address)); } void storePtr(Register src, const Address& address) { movq(src, Operand(address)); } void storePtr(Register src, const BaseIndex& address) { movq(src, Operand(address)); } void storePtr(Register src, const Operand& dest) { movq(src, dest); } void storePtr(Register src, AbsoluteAddress address) { if (X86Encoding::IsAddressImmediate(address.addr)) { movq(src, Operand(address)); } else { ScratchRegisterScope scratch(asMasm()); mov(ImmPtr(address.addr), scratch); storePtr(src, Address(scratch, 0x0)); } } void store32(Register src, AbsoluteAddress address) { if (X86Encoding::IsAddressImmediate(address.addr)) { movl(src, Operand(address)); } else { ScratchRegisterScope scratch(asMasm()); mov(ImmPtr(address.addr), scratch); store32(src, Address(scratch, 0x0)); } } void store16(Register src, AbsoluteAddress address) { if (X86Encoding::IsAddressImmediate(address.addr)) { movw(src, Operand(address)); } else { ScratchRegisterScope scratch(asMasm()); mov(ImmPtr(address.addr), scratch); store16(src, Address(scratch, 0x0)); } } void store64(Register64 src, Address address) { storePtr(src.reg, address); } void store64(Imm64 imm, Address address) { storePtr(ImmWord(imm.value), address); } void splitTag(Register src, Register dest) { if (src != dest) movq(src, dest); shrq(Imm32(JSVAL_TAG_SHIFT), dest); } void splitTag(const ValueOperand& operand, Register dest) { splitTag(operand.valueReg(), dest); } void splitTag(const Operand& operand, Register dest) { movq(operand, dest); shrq(Imm32(JSVAL_TAG_SHIFT), dest); } void splitTag(const Address& operand, Register dest) { splitTag(Operand(operand), dest); } void splitTag(const BaseIndex& operand, Register dest) { splitTag(Operand(operand), dest); } // Extracts the tag of a value and places it in ScratchReg. Register splitTagForTest(const ValueOperand& value) { splitTag(value, ScratchReg); return ScratchReg; } void cmpTag(const ValueOperand& operand, ImmTag tag) { Register reg = splitTagForTest(operand); cmp32(reg, tag); } Condition testMagic(Condition cond, const ValueOperand& src) { ScratchRegisterScope scratch(asMasm()); splitTag(src, scratch); return testMagic(cond, scratch); } Condition testError(Condition cond, const ValueOperand& src) { return testMagic(cond, src); } void testNullSet(Condition cond, const ValueOperand& value, Register dest) { cond = testNull(cond, value); emitSet(cond, dest); } void testObjectSet(Condition cond, const ValueOperand& value, Register dest) { cond = testObject(cond, value); emitSet(cond, dest); } void testUndefinedSet(Condition cond, const ValueOperand& value, Register dest) { cond = testUndefined(cond, value); emitSet(cond, dest); } void boxDouble(FloatRegister src, const ValueOperand& dest) { vmovq(src, dest.valueReg()); } void boxNonDouble(JSValueType type, Register src, const ValueOperand& dest) { MOZ_ASSERT(src != dest.valueReg()); boxValue(type, src, dest.valueReg()); } // Note that the |dest| register here may be ScratchReg, so we shouldn't // use it. void unboxInt32(const ValueOperand& src, Register dest) { movl(src.valueReg(), dest); } void unboxInt32(const Operand& src, Register dest) { movl(src, dest); } void unboxInt32(const Address& src, Register dest) { unboxInt32(Operand(src), dest); } void unboxDouble(const Address& src, FloatRegister dest) { loadDouble(Operand(src), dest); } void unboxArgObjMagic(const ValueOperand& src, Register dest) { unboxArgObjMagic(Operand(src.valueReg()), dest); } void unboxArgObjMagic(const Operand& src, Register dest) { mov(ImmWord(0), dest); } void unboxArgObjMagic(const Address& src, Register dest) { unboxArgObjMagic(Operand(src), dest); } void unboxBoolean(const ValueOperand& src, Register dest) { movl(src.valueReg(), dest); } void unboxBoolean(const Operand& src, Register dest) { movl(src, dest); } void unboxBoolean(const Address& src, Register dest) { unboxBoolean(Operand(src), dest); } void unboxMagic(const ValueOperand& src, Register dest) { movl(src.valueReg(), dest); } void unboxDouble(const ValueOperand& src, FloatRegister dest) { vmovq(src.valueReg(), dest); } void unboxPrivate(const ValueOperand& src, const Register dest) { movq(src.valueReg(), dest); shlq(Imm32(1), dest); } void notBoolean(const ValueOperand& val) { xorq(Imm32(1), val.valueReg()); } // Unbox any non-double value into dest. Prefer unboxInt32 or unboxBoolean // instead if the source type is known. void unboxNonDouble(const ValueOperand& src, Register dest) { if (src.valueReg() == dest) { ScratchRegisterScope scratch(asMasm()); mov(ImmWord(JSVAL_PAYLOAD_MASK), scratch); andq(scratch, dest); } else { mov(ImmWord(JSVAL_PAYLOAD_MASK), dest); andq(src.valueReg(), dest); } } void unboxNonDouble(const Operand& src, Register dest) { // Explicitly permits |dest| to be used in |src|. ScratchRegisterScope scratch(asMasm()); MOZ_ASSERT(dest != scratch); if (src.containsReg(dest)) { mov(ImmWord(JSVAL_PAYLOAD_MASK), scratch); // If src is already a register, then src and dest are the same // thing and we don't need to move anything into dest. if (src.kind() != Operand::REG) movq(src, dest); andq(scratch, dest); } else { mov(ImmWord(JSVAL_PAYLOAD_MASK), dest); andq(src, dest); } } void unboxString(const ValueOperand& src, Register dest) { unboxNonDouble(src, dest); } void unboxString(const Operand& src, Register dest) { unboxNonDouble(src, dest); } void unboxSymbol(const ValueOperand& src, Register dest) { unboxNonDouble(src, dest); } void unboxSymbol(const Operand& src, Register dest) { unboxNonDouble(src, dest); } void unboxObject(const ValueOperand& src, Register dest) { unboxNonDouble(src, dest); } void unboxObject(const Operand& src, Register dest) { unboxNonDouble(src, dest); } void unboxObject(const Address& src, Register dest) { unboxNonDouble(Operand(src), dest); } void unboxObject(const BaseIndex& src, Register dest) { unboxNonDouble(Operand(src), dest); } // Extended unboxing API. If the payload is already in a register, returns // that register. Otherwise, provides a move to the given scratch register, // and returns that. Register extractObject(const Address& address, Register scratch) { MOZ_ASSERT(scratch != ScratchReg); unboxObject(address, scratch); return scratch; } Register extractObject(const ValueOperand& value, Register scratch) { MOZ_ASSERT(scratch != ScratchReg); unboxObject(value, scratch); return scratch; } Register extractInt32(const ValueOperand& value, Register scratch) { MOZ_ASSERT(scratch != ScratchReg); unboxInt32(value, scratch); return scratch; } Register extractBoolean(const ValueOperand& value, Register scratch) { MOZ_ASSERT(scratch != ScratchReg); unboxBoolean(value, scratch); return scratch; } Register extractTag(const Address& address, Register scratch) { MOZ_ASSERT(scratch != ScratchReg); loadPtr(address, scratch); splitTag(scratch, scratch); return scratch; } Register extractTag(const ValueOperand& value, Register scratch) { MOZ_ASSERT(scratch != ScratchReg); splitTag(value, scratch); return scratch; } inline void unboxValue(const ValueOperand& src, AnyRegister dest); // These two functions use the low 32-bits of the full value register. void boolValueToDouble(const ValueOperand& operand, FloatRegister dest) { convertInt32ToDouble(operand.valueReg(), dest); } void int32ValueToDouble(const ValueOperand& operand, FloatRegister dest) { convertInt32ToDouble(operand.valueReg(), dest); } void boolValueToFloat32(const ValueOperand& operand, FloatRegister dest) { convertInt32ToFloat32(operand.valueReg(), dest); } void int32ValueToFloat32(const ValueOperand& operand, FloatRegister dest) { convertInt32ToFloat32(operand.valueReg(), dest); } void loadConstantDouble(double d, FloatRegister dest); void loadConstantFloat32(float f, FloatRegister dest); void loadConstantDouble(wasm::RawF64 d, FloatRegister dest); void loadConstantFloat32(wasm::RawF32 f, FloatRegister dest); void loadConstantSimd128Int(const SimdConstant& v, FloatRegister dest); void loadConstantSimd128Float(const SimdConstant& v, FloatRegister dest); void convertInt64ToDouble(Register64 input, FloatRegister output); void convertInt64ToFloat32(Register64 input, FloatRegister output); static bool convertUInt64ToDoubleNeedsTemp(); void convertUInt64ToDouble(Register64 input, FloatRegister output, Register temp); void convertUInt64ToFloat32(Register64 input, FloatRegister output, Register temp); void wasmTruncateDoubleToInt64(FloatRegister input, Register64 output, Label* oolEntry, Label* oolRejoin, FloatRegister tempDouble); void wasmTruncateDoubleToUInt64(FloatRegister input, Register64 output, Label* oolEntry, Label* oolRejoin, FloatRegister tempDouble); void wasmTruncateFloat32ToInt64(FloatRegister input, Register64 output, Label* oolEntry, Label* oolRejoin, FloatRegister tempDouble); void wasmTruncateFloat32ToUInt64(FloatRegister input, Register64 output, Label* oolEntry, Label* oolRejoin, FloatRegister tempDouble); void loadWasmGlobalPtr(uint32_t globalDataOffset, Register dest) { CodeOffset label = loadRipRelativeInt64(dest); append(wasm::GlobalAccess(label, globalDataOffset)); } void loadWasmPinnedRegsFromTls() { loadPtr(Address(WasmTlsReg, offsetof(wasm::TlsData, memoryBase)), HeapReg); } public: Condition testInt32Truthy(bool truthy, const ValueOperand& operand) { test32(operand.valueReg(), operand.valueReg()); return truthy ? NonZero : Zero; } Condition testStringTruthy(bool truthy, const ValueOperand& value) { ScratchRegisterScope scratch(asMasm()); unboxString(value, scratch); cmp32(Operand(scratch, JSString::offsetOfLength()), Imm32(0)); return truthy ? Assembler::NotEqual : Assembler::Equal; } template <typename T> inline void loadInt32OrDouble(const T& src, FloatRegister dest); template <typename T> void loadUnboxedValue(const T& src, MIRType type, AnyRegister dest) { if (dest.isFloat()) loadInt32OrDouble(src, dest.fpu()); else if (type == MIRType::Int32 || type == MIRType::Boolean) movl(Operand(src), dest.gpr()); else unboxNonDouble(Operand(src), dest.gpr()); } template <typename T> void storeUnboxedPayload(ValueOperand value, T address, size_t nbytes) { switch (nbytes) { case 8: { ScratchRegisterScope scratch(asMasm()); unboxNonDouble(value, scratch); storePtr(scratch, address); return; } case 4: store32(value.valueReg(), address); return; case 1: store8(value.valueReg(), address); return; default: MOZ_CRASH("Bad payload width"); } } void loadInstructionPointerAfterCall(Register dest) { loadPtr(Address(StackPointer, 0x0), dest); } void convertUInt32ToDouble(Register src, FloatRegister dest) { // Zero the output register to break dependencies, see convertInt32ToDouble. zeroDouble(dest); vcvtsq2sd(src, dest, dest); } void convertUInt32ToFloat32(Register src, FloatRegister dest) { // Zero the output register to break dependencies, see convertInt32ToDouble. zeroDouble(dest); vcvtsq2ss(src, dest, dest); } inline void incrementInt32Value(const Address& addr); inline void ensureDouble(const ValueOperand& source, FloatRegister dest, Label* failure); public: void handleFailureWithHandlerTail(void* handler); // Instrumentation for entering and leaving the profiler. void profilerEnterFrame(Register framePtr, Register scratch); void profilerExitFrame(); }; typedef MacroAssemblerX64 MacroAssemblerSpecific; } // namespace jit } // namespace js #endif /* jit_x64_MacroAssembler_x64_h */