| /* |
| * Copyright (C) 2008 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef MacroAssemblerX86Common_h |
| #define MacroAssemblerX86Common_h |
| |
| #if ENABLE(ASSEMBLER) |
| |
| #include "X86Assembler.h" |
| #include "AbstractMacroAssembler.h" |
| |
| namespace JSC { |
| |
| class MacroAssemblerX86Common : public AbstractMacroAssembler<X86Assembler> { |
| protected: |
| #if CPU(X86_64) |
| static const X86Registers::RegisterID scratchRegister = X86Registers::r11; |
| #endif |
| |
| static const int DoubleConditionBitInvert = 0x10; |
| static const int DoubleConditionBitSpecial = 0x20; |
| static const int DoubleConditionBits = DoubleConditionBitInvert | DoubleConditionBitSpecial; |
| |
| public: |
| typedef X86Assembler::FPRegisterID FPRegisterID; |
| typedef X86Assembler::XMMRegisterID XMMRegisterID; |
| |
| static bool isCompactPtrAlignedAddressOffset(ptrdiff_t value) |
| { |
| return value >= -128 && value <= 127; |
| } |
| |
| enum RelationalCondition { |
| Equal = X86Assembler::ConditionE, |
| NotEqual = X86Assembler::ConditionNE, |
| Above = X86Assembler::ConditionA, |
| AboveOrEqual = X86Assembler::ConditionAE, |
| Below = X86Assembler::ConditionB, |
| BelowOrEqual = X86Assembler::ConditionBE, |
| GreaterThan = X86Assembler::ConditionG, |
| GreaterThanOrEqual = X86Assembler::ConditionGE, |
| LessThan = X86Assembler::ConditionL, |
| LessThanOrEqual = X86Assembler::ConditionLE |
| }; |
| |
| enum ResultCondition { |
| Overflow = X86Assembler::ConditionO, |
| Signed = X86Assembler::ConditionS, |
| Zero = X86Assembler::ConditionE, |
| NonZero = X86Assembler::ConditionNE |
| }; |
| |
| enum DoubleCondition { |
| // These conditions will only evaluate to true if the comparison is ordered - i.e. neither operand is NaN. |
| DoubleEqual = X86Assembler::ConditionE | DoubleConditionBitSpecial, |
| DoubleNotEqual = X86Assembler::ConditionNE, |
| DoubleGreaterThan = X86Assembler::ConditionA, |
| DoubleGreaterThanOrEqual = X86Assembler::ConditionAE, |
| DoubleLessThan = X86Assembler::ConditionA | DoubleConditionBitInvert, |
| DoubleLessThanOrEqual = X86Assembler::ConditionAE | DoubleConditionBitInvert, |
| // If either operand is NaN, these conditions always evaluate to true. |
| DoubleEqualOrUnordered = X86Assembler::ConditionE, |
| DoubleNotEqualOrUnordered = X86Assembler::ConditionNE | DoubleConditionBitSpecial, |
| DoubleGreaterThanOrUnordered = X86Assembler::ConditionB | DoubleConditionBitInvert, |
| DoubleGreaterThanOrEqualOrUnordered = X86Assembler::ConditionBE | DoubleConditionBitInvert, |
| DoubleLessThanOrUnordered = X86Assembler::ConditionB, |
| DoubleLessThanOrEqualOrUnordered = X86Assembler::ConditionBE, |
| }; |
| COMPILE_ASSERT( |
| !((X86Assembler::ConditionE | X86Assembler::ConditionNE | X86Assembler::ConditionA | X86Assembler::ConditionAE | X86Assembler::ConditionB | X86Assembler::ConditionBE) & DoubleConditionBits), |
| DoubleConditionBits_should_not_interfere_with_X86Assembler_Condition_codes); |
| |
| static const RegisterID stackPointerRegister = X86Registers::esp; |
| |
| #if ENABLE(JIT_CONSTANT_BLINDING) |
| static bool shouldBlindForSpecificArch(uint32_t value) { return value >= 0x00ffffff; } |
| #if CPU(X86_64) |
| static bool shouldBlindForSpecificArch(uint64_t value) { return value >= 0x00ffffff; } |
| #if OS(DARWIN) // On 64-bit systems other than DARWIN uint64_t and uintptr_t are the same type so overload is prohibited. |
| static bool shouldBlindForSpecificArch(uintptr_t value) { return value >= 0x00ffffff; } |
| #endif |
| #endif |
| #endif |
| |
| // Integer arithmetic operations: |
| // |
| // Operations are typically two operand - operation(source, srcDst) |
| // For many operations the source may be an TrustedImm32, the srcDst operand |
| // may often be a memory location (explictly described using an Address |
| // object). |
| |
| void add32(RegisterID src, RegisterID dest) |
| { |
| m_assembler.addl_rr(src, dest); |
| } |
| |
| void add32(TrustedImm32 imm, Address address) |
| { |
| m_assembler.addl_im(imm.m_value, address.offset, address.base); |
| } |
| |
| void add32(TrustedImm32 imm, RegisterID dest) |
| { |
| m_assembler.addl_ir(imm.m_value, dest); |
| } |
| |
| void add32(Address src, RegisterID dest) |
| { |
| m_assembler.addl_mr(src.offset, src.base, dest); |
| } |
| |
| void add32(RegisterID src, Address dest) |
| { |
| m_assembler.addl_rm(src, dest.offset, dest.base); |
| } |
| |
| void add32(TrustedImm32 imm, RegisterID src, RegisterID dest) |
| { |
| m_assembler.leal_mr(imm.m_value, src, dest); |
| } |
| |
| void and32(RegisterID src, RegisterID dest) |
| { |
| m_assembler.andl_rr(src, dest); |
| } |
| |
| void and32(TrustedImm32 imm, RegisterID dest) |
| { |
| m_assembler.andl_ir(imm.m_value, dest); |
| } |
| |
| void and32(RegisterID src, Address dest) |
| { |
| m_assembler.andl_rm(src, dest.offset, dest.base); |
| } |
| |
| void and32(Address src, RegisterID dest) |
| { |
| m_assembler.andl_mr(src.offset, src.base, dest); |
| } |
| |
| void and32(TrustedImm32 imm, Address address) |
| { |
| m_assembler.andl_im(imm.m_value, address.offset, address.base); |
| } |
| |
| void and32(RegisterID op1, RegisterID op2, RegisterID dest) |
| { |
| if (op1 == op2) |
| zeroExtend32ToPtr(op1, dest); |
| else if (op1 == dest) |
| and32(op2, dest); |
| else { |
| move(op2, dest); |
| and32(op1, dest); |
| } |
| } |
| |
| void and32(TrustedImm32 imm, RegisterID src, RegisterID dest) |
| { |
| move(src, dest); |
| and32(imm, dest); |
| } |
| |
| void lshift32(RegisterID shift_amount, RegisterID dest) |
| { |
| ASSERT(shift_amount != dest); |
| |
| if (shift_amount == X86Registers::ecx) |
| m_assembler.shll_CLr(dest); |
| else { |
| // On x86 we can only shift by ecx; if asked to shift by another register we'll |
| // need rejig the shift amount into ecx first, and restore the registers afterwards. |
| // If we dest is ecx, then shift the swapped register! |
| swap(shift_amount, X86Registers::ecx); |
| m_assembler.shll_CLr(dest == X86Registers::ecx ? shift_amount : dest); |
| swap(shift_amount, X86Registers::ecx); |
| } |
| } |
| |
| void lshift32(RegisterID src, RegisterID shift_amount, RegisterID dest) |
| { |
| ASSERT(shift_amount != dest); |
| |
| if (src != dest) |
| move(src, dest); |
| lshift32(shift_amount, dest); |
| } |
| |
| void lshift32(TrustedImm32 imm, RegisterID dest) |
| { |
| m_assembler.shll_i8r(imm.m_value, dest); |
| } |
| |
| void lshift32(RegisterID src, TrustedImm32 imm, RegisterID dest) |
| { |
| if (src != dest) |
| move(src, dest); |
| lshift32(imm, dest); |
| } |
| |
| void mul32(RegisterID src, RegisterID dest) |
| { |
| m_assembler.imull_rr(src, dest); |
| } |
| |
| void mul32(Address src, RegisterID dest) |
| { |
| m_assembler.imull_mr(src.offset, src.base, dest); |
| } |
| |
| void mul32(TrustedImm32 imm, RegisterID src, RegisterID dest) |
| { |
| m_assembler.imull_i32r(src, imm.m_value, dest); |
| } |
| |
| void neg32(RegisterID srcDest) |
| { |
| m_assembler.negl_r(srcDest); |
| } |
| |
| void neg32(Address srcDest) |
| { |
| m_assembler.negl_m(srcDest.offset, srcDest.base); |
| } |
| |
| void or32(RegisterID src, RegisterID dest) |
| { |
| m_assembler.orl_rr(src, dest); |
| } |
| |
| void or32(TrustedImm32 imm, RegisterID dest) |
| { |
| m_assembler.orl_ir(imm.m_value, dest); |
| } |
| |
| void or32(RegisterID src, Address dest) |
| { |
| m_assembler.orl_rm(src, dest.offset, dest.base); |
| } |
| |
| void or32(Address src, RegisterID dest) |
| { |
| m_assembler.orl_mr(src.offset, src.base, dest); |
| } |
| |
| void or32(TrustedImm32 imm, Address address) |
| { |
| m_assembler.orl_im(imm.m_value, address.offset, address.base); |
| } |
| |
| void or32(RegisterID op1, RegisterID op2, RegisterID dest) |
| { |
| if (op1 == op2) |
| zeroExtend32ToPtr(op1, dest); |
| else if (op1 == dest) |
| or32(op2, dest); |
| else { |
| move(op2, dest); |
| or32(op1, dest); |
| } |
| } |
| |
| void or32(TrustedImm32 imm, RegisterID src, RegisterID dest) |
| { |
| move(src, dest); |
| or32(imm, dest); |
| } |
| |
| void rshift32(RegisterID shift_amount, RegisterID dest) |
| { |
| ASSERT(shift_amount != dest); |
| |
| if (shift_amount == X86Registers::ecx) |
| m_assembler.sarl_CLr(dest); |
| else { |
| // On x86 we can only shift by ecx; if asked to shift by another register we'll |
| // need rejig the shift amount into ecx first, and restore the registers afterwards. |
| // If we dest is ecx, then shift the swapped register! |
| swap(shift_amount, X86Registers::ecx); |
| m_assembler.sarl_CLr(dest == X86Registers::ecx ? shift_amount : dest); |
| swap(shift_amount, X86Registers::ecx); |
| } |
| } |
| |
| void rshift32(RegisterID src, RegisterID shift_amount, RegisterID dest) |
| { |
| ASSERT(shift_amount != dest); |
| |
| if (src != dest) |
| move(src, dest); |
| rshift32(shift_amount, dest); |
| } |
| |
| void rshift32(TrustedImm32 imm, RegisterID dest) |
| { |
| m_assembler.sarl_i8r(imm.m_value, dest); |
| } |
| |
| void rshift32(RegisterID src, TrustedImm32 imm, RegisterID dest) |
| { |
| if (src != dest) |
| move(src, dest); |
| rshift32(imm, dest); |
| } |
| |
| void urshift32(RegisterID shift_amount, RegisterID dest) |
| { |
| ASSERT(shift_amount != dest); |
| |
| if (shift_amount == X86Registers::ecx) |
| m_assembler.shrl_CLr(dest); |
| else { |
| // On x86 we can only shift by ecx; if asked to shift by another register we'll |
| // need rejig the shift amount into ecx first, and restore the registers afterwards. |
| // If we dest is ecx, then shift the swapped register! |
| swap(shift_amount, X86Registers::ecx); |
| m_assembler.shrl_CLr(dest == X86Registers::ecx ? shift_amount : dest); |
| swap(shift_amount, X86Registers::ecx); |
| } |
| } |
| |
| void urshift32(RegisterID src, RegisterID shift_amount, RegisterID dest) |
| { |
| ASSERT(shift_amount != dest); |
| |
| if (src != dest) |
| move(src, dest); |
| urshift32(shift_amount, dest); |
| } |
| |
| void urshift32(TrustedImm32 imm, RegisterID dest) |
| { |
| m_assembler.shrl_i8r(imm.m_value, dest); |
| } |
| |
| void urshift32(RegisterID src, TrustedImm32 imm, RegisterID dest) |
| { |
| if (src != dest) |
| move(src, dest); |
| urshift32(imm, dest); |
| } |
| |
| void sub32(RegisterID src, RegisterID dest) |
| { |
| m_assembler.subl_rr(src, dest); |
| } |
| |
| void sub32(TrustedImm32 imm, RegisterID dest) |
| { |
| m_assembler.subl_ir(imm.m_value, dest); |
| } |
| |
| void sub32(TrustedImm32 imm, Address address) |
| { |
| m_assembler.subl_im(imm.m_value, address.offset, address.base); |
| } |
| |
| void sub32(Address src, RegisterID dest) |
| { |
| m_assembler.subl_mr(src.offset, src.base, dest); |
| } |
| |
| void sub32(RegisterID src, Address dest) |
| { |
| m_assembler.subl_rm(src, dest.offset, dest.base); |
| } |
| |
| void xor32(RegisterID src, RegisterID dest) |
| { |
| m_assembler.xorl_rr(src, dest); |
| } |
| |
| void xor32(TrustedImm32 imm, Address dest) |
| { |
| if (imm.m_value == -1) |
| m_assembler.notl_m(dest.offset, dest.base); |
| else |
| m_assembler.xorl_im(imm.m_value, dest.offset, dest.base); |
| } |
| |
| void xor32(TrustedImm32 imm, RegisterID dest) |
| { |
| if (imm.m_value == -1) |
| m_assembler.notl_r(dest); |
| else |
| m_assembler.xorl_ir(imm.m_value, dest); |
| } |
| |
| void xor32(RegisterID src, Address dest) |
| { |
| m_assembler.xorl_rm(src, dest.offset, dest.base); |
| } |
| |
| void xor32(Address src, RegisterID dest) |
| { |
| m_assembler.xorl_mr(src.offset, src.base, dest); |
| } |
| |
| void xor32(RegisterID op1, RegisterID op2, RegisterID dest) |
| { |
| if (op1 == op2) |
| move(TrustedImm32(0), dest); |
| else if (op1 == dest) |
| xor32(op2, dest); |
| else { |
| move(op2, dest); |
| xor32(op1, dest); |
| } |
| } |
| |
| void xor32(TrustedImm32 imm, RegisterID src, RegisterID dest) |
| { |
| move(src, dest); |
| xor32(imm, dest); |
| } |
| |
| void sqrtDouble(FPRegisterID src, FPRegisterID dst) |
| { |
| m_assembler.sqrtsd_rr(src, dst); |
| } |
| |
| void absDouble(FPRegisterID src, FPRegisterID dst) |
| { |
| ASSERT(src != dst); |
| static const double negativeZeroConstant = -0.0; |
| loadDouble(&negativeZeroConstant, dst); |
| m_assembler.andnpd_rr(src, dst); |
| } |
| |
| void negateDouble(FPRegisterID src, FPRegisterID dst) |
| { |
| ASSERT(src != dst); |
| static const double negativeZeroConstant = -0.0; |
| loadDouble(&negativeZeroConstant, dst); |
| m_assembler.xorpd_rr(src, dst); |
| } |
| |
| |
| // Memory access operations: |
| // |
| // Loads are of the form load(address, destination) and stores of the form |
| // store(source, address). The source for a store may be an TrustedImm32. Address |
| // operand objects to loads and store will be implicitly constructed if a |
| // register is passed. |
| |
| void load32(ImplicitAddress address, RegisterID dest) |
| { |
| m_assembler.movl_mr(address.offset, address.base, dest); |
| } |
| |
| void load32(BaseIndex address, RegisterID dest) |
| { |
| m_assembler.movl_mr(address.offset, address.base, address.index, address.scale, dest); |
| } |
| |
| void load32WithUnalignedHalfWords(BaseIndex address, RegisterID dest) |
| { |
| load32(address, dest); |
| } |
| |
| void load16Unaligned(BaseIndex address, RegisterID dest) |
| { |
| load16(address, dest); |
| } |
| |
| DataLabel32 load32WithAddressOffsetPatch(Address address, RegisterID dest) |
| { |
| padBeforePatch(); |
| m_assembler.movl_mr_disp32(address.offset, address.base, dest); |
| return DataLabel32(this); |
| } |
| |
| DataLabelCompact load32WithCompactAddressOffsetPatch(Address address, RegisterID dest) |
| { |
| padBeforePatch(); |
| m_assembler.movl_mr_disp8(address.offset, address.base, dest); |
| return DataLabelCompact(this); |
| } |
| |
| static void repatchCompact(CodeLocationDataLabelCompact dataLabelCompact, int32_t value) |
| { |
| ASSERT(isCompactPtrAlignedAddressOffset(value)); |
| AssemblerType_T::repatchCompact(dataLabelCompact.dataLocation(), value); |
| } |
| |
| DataLabelCompact loadCompactWithAddressOffsetPatch(Address address, RegisterID dest) |
| { |
| padBeforePatch(); |
| m_assembler.movl_mr_disp8(address.offset, address.base, dest); |
| return DataLabelCompact(this); |
| } |
| |
| void load8(BaseIndex address, RegisterID dest) |
| { |
| m_assembler.movzbl_mr(address.offset, address.base, address.index, address.scale, dest); |
| } |
| |
| void load8(ImplicitAddress address, RegisterID dest) |
| { |
| m_assembler.movzbl_mr(address.offset, address.base, dest); |
| } |
| |
| void load8Signed(BaseIndex address, RegisterID dest) |
| { |
| m_assembler.movsbl_mr(address.offset, address.base, address.index, address.scale, dest); |
| } |
| |
| void load8Signed(ImplicitAddress address, RegisterID dest) |
| { |
| m_assembler.movsbl_mr(address.offset, address.base, dest); |
| } |
| |
| void load16(BaseIndex address, RegisterID dest) |
| { |
| m_assembler.movzwl_mr(address.offset, address.base, address.index, address.scale, dest); |
| } |
| |
| void load16(Address address, RegisterID dest) |
| { |
| m_assembler.movzwl_mr(address.offset, address.base, dest); |
| } |
| |
| void load16Signed(BaseIndex address, RegisterID dest) |
| { |
| m_assembler.movswl_mr(address.offset, address.base, address.index, address.scale, dest); |
| } |
| |
| void load16Signed(Address address, RegisterID dest) |
| { |
| m_assembler.movswl_mr(address.offset, address.base, dest); |
| } |
| |
| DataLabel32 store32WithAddressOffsetPatch(RegisterID src, Address address) |
| { |
| padBeforePatch(); |
| m_assembler.movl_rm_disp32(src, address.offset, address.base); |
| return DataLabel32(this); |
| } |
| |
| void store32(RegisterID src, ImplicitAddress address) |
| { |
| m_assembler.movl_rm(src, address.offset, address.base); |
| } |
| |
| void store32(RegisterID src, BaseIndex address) |
| { |
| m_assembler.movl_rm(src, address.offset, address.base, address.index, address.scale); |
| } |
| |
| void store32(TrustedImm32 imm, ImplicitAddress address) |
| { |
| m_assembler.movl_i32m(imm.m_value, address.offset, address.base); |
| } |
| |
| void store32(TrustedImm32 imm, BaseIndex address) |
| { |
| m_assembler.movl_i32m(imm.m_value, address.offset, address.base, address.index, address.scale); |
| } |
| |
| void store8(TrustedImm32 imm, Address address) |
| { |
| ASSERT(-128 <= imm.m_value && imm.m_value < 128); |
| m_assembler.movb_i8m(imm.m_value, address.offset, address.base); |
| } |
| |
| void store8(TrustedImm32 imm, BaseIndex address) |
| { |
| ASSERT(-128 <= imm.m_value && imm.m_value < 128); |
| m_assembler.movb_i8m(imm.m_value, address.offset, address.base, address.index, address.scale); |
| } |
| |
| void store8(RegisterID src, BaseIndex address) |
| { |
| #if CPU(X86) |
| // On 32-bit x86 we can only store from the first 4 registers; |
| // esp..edi are mapped to the 'h' registers! |
| if (src >= 4) { |
| // Pick a temporary register. |
| RegisterID temp; |
| if (address.base != X86Registers::eax && address.index != X86Registers::eax) |
| temp = X86Registers::eax; |
| else if (address.base != X86Registers::ebx && address.index != X86Registers::ebx) |
| temp = X86Registers::ebx; |
| else { |
| ASSERT(address.base != X86Registers::ecx && address.index != X86Registers::ecx); |
| temp = X86Registers::ecx; |
| } |
| |
| // Swap to the temporary register to perform the store. |
| swap(src, temp); |
| m_assembler.movb_rm(temp, address.offset, address.base, address.index, address.scale); |
| swap(src, temp); |
| return; |
| } |
| #endif |
| m_assembler.movb_rm(src, address.offset, address.base, address.index, address.scale); |
| } |
| |
| void store16(RegisterID src, BaseIndex address) |
| { |
| #if CPU(X86) |
| // On 32-bit x86 we can only store from the first 4 registers; |
| // esp..edi are mapped to the 'h' registers! |
| if (src >= 4) { |
| // Pick a temporary register. |
| RegisterID temp; |
| if (address.base != X86Registers::eax && address.index != X86Registers::eax) |
| temp = X86Registers::eax; |
| else if (address.base != X86Registers::ebx && address.index != X86Registers::ebx) |
| temp = X86Registers::ebx; |
| else { |
| ASSERT(address.base != X86Registers::ecx && address.index != X86Registers::ecx); |
| temp = X86Registers::ecx; |
| } |
| |
| // Swap to the temporary register to perform the store. |
| swap(src, temp); |
| m_assembler.movw_rm(temp, address.offset, address.base, address.index, address.scale); |
| swap(src, temp); |
| return; |
| } |
| #endif |
| m_assembler.movw_rm(src, address.offset, address.base, address.index, address.scale); |
| } |
| |
| |
| // Floating-point operation: |
| // |
| // Presently only supports SSE, not x87 floating point. |
| |
| void moveDouble(FPRegisterID src, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| if (src != dest) |
| m_assembler.movsd_rr(src, dest); |
| } |
| |
| void loadDouble(const void* address, FPRegisterID dest) |
| { |
| #if CPU(X86) |
| ASSERT(isSSE2Present()); |
| m_assembler.movsd_mr(address, dest); |
| #else |
| move(TrustedImmPtr(address), scratchRegister); |
| loadDouble(scratchRegister, dest); |
| #endif |
| } |
| |
| void loadDouble(ImplicitAddress address, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.movsd_mr(address.offset, address.base, dest); |
| } |
| |
| void loadDouble(BaseIndex address, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.movsd_mr(address.offset, address.base, address.index, address.scale, dest); |
| } |
| void loadFloat(BaseIndex address, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.movss_mr(address.offset, address.base, address.index, address.scale, dest); |
| } |
| |
| void storeDouble(FPRegisterID src, ImplicitAddress address) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.movsd_rm(src, address.offset, address.base); |
| } |
| |
| void storeDouble(FPRegisterID src, BaseIndex address) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.movsd_rm(src, address.offset, address.base, address.index, address.scale); |
| } |
| |
| void storeFloat(FPRegisterID src, BaseIndex address) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.movss_rm(src, address.offset, address.base, address.index, address.scale); |
| } |
| |
| void convertDoubleToFloat(FPRegisterID src, FPRegisterID dst) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.cvtsd2ss_rr(src, dst); |
| } |
| |
| void convertFloatToDouble(FPRegisterID src, FPRegisterID dst) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.cvtss2sd_rr(src, dst); |
| } |
| |
| void addDouble(FPRegisterID src, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.addsd_rr(src, dest); |
| } |
| |
| void addDouble(FPRegisterID op1, FPRegisterID op2, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| if (op1 == dest) |
| addDouble(op2, dest); |
| else { |
| moveDouble(op2, dest); |
| addDouble(op1, dest); |
| } |
| } |
| |
| void addDouble(Address src, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.addsd_mr(src.offset, src.base, dest); |
| } |
| |
| void divDouble(FPRegisterID src, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.divsd_rr(src, dest); |
| } |
| |
| void divDouble(FPRegisterID op1, FPRegisterID op2, FPRegisterID dest) |
| { |
| // B := A / B is invalid. |
| ASSERT(op1 == dest || op2 != dest); |
| |
| moveDouble(op1, dest); |
| divDouble(op2, dest); |
| } |
| |
| void divDouble(Address src, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.divsd_mr(src.offset, src.base, dest); |
| } |
| |
| void subDouble(FPRegisterID src, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.subsd_rr(src, dest); |
| } |
| |
| void subDouble(FPRegisterID op1, FPRegisterID op2, FPRegisterID dest) |
| { |
| // B := A - B is invalid. |
| ASSERT(op1 == dest || op2 != dest); |
| |
| moveDouble(op1, dest); |
| subDouble(op2, dest); |
| } |
| |
| void subDouble(Address src, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.subsd_mr(src.offset, src.base, dest); |
| } |
| |
| void mulDouble(FPRegisterID src, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.mulsd_rr(src, dest); |
| } |
| |
| void mulDouble(FPRegisterID op1, FPRegisterID op2, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| if (op1 == dest) |
| mulDouble(op2, dest); |
| else { |
| moveDouble(op2, dest); |
| mulDouble(op1, dest); |
| } |
| } |
| |
| void mulDouble(Address src, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.mulsd_mr(src.offset, src.base, dest); |
| } |
| |
| void convertInt32ToDouble(RegisterID src, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.cvtsi2sd_rr(src, dest); |
| } |
| |
| void convertInt32ToDouble(Address src, FPRegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.cvtsi2sd_mr(src.offset, src.base, dest); |
| } |
| |
| Jump branchDouble(DoubleCondition cond, FPRegisterID left, FPRegisterID right) |
| { |
| ASSERT(isSSE2Present()); |
| |
| if (cond & DoubleConditionBitInvert) |
| m_assembler.ucomisd_rr(left, right); |
| else |
| m_assembler.ucomisd_rr(right, left); |
| |
| if (cond == DoubleEqual) { |
| if (left == right) |
| return Jump(m_assembler.jnp()); |
| Jump isUnordered(m_assembler.jp()); |
| Jump result = Jump(m_assembler.je()); |
| isUnordered.link(this); |
| return result; |
| } else if (cond == DoubleNotEqualOrUnordered) { |
| if (left == right) |
| return Jump(m_assembler.jp()); |
| Jump isUnordered(m_assembler.jp()); |
| Jump isEqual(m_assembler.je()); |
| isUnordered.link(this); |
| Jump result = jump(); |
| isEqual.link(this); |
| return result; |
| } |
| |
| ASSERT(!(cond & DoubleConditionBitSpecial)); |
| return Jump(m_assembler.jCC(static_cast<X86Assembler::Condition>(cond & ~DoubleConditionBits))); |
| } |
| |
| // Truncates 'src' to an integer, and places the resulting 'dest'. |
| // If the result is not representable as a 32 bit value, branch. |
| // May also branch for some values that are representable in 32 bits |
| // (specifically, in this case, INT_MIN). |
| enum BranchTruncateType { BranchIfTruncateFailed, BranchIfTruncateSuccessful }; |
| Jump branchTruncateDoubleToInt32(FPRegisterID src, RegisterID dest, BranchTruncateType branchType = BranchIfTruncateFailed) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.cvttsd2si_rr(src, dest); |
| return branch32(branchType ? NotEqual : Equal, dest, TrustedImm32(0x80000000)); |
| } |
| |
| Jump branchTruncateDoubleToUint32(FPRegisterID src, RegisterID dest, BranchTruncateType branchType = BranchIfTruncateFailed) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.cvttsd2si_rr(src, dest); |
| return branch32(branchType ? GreaterThanOrEqual : LessThan, dest, TrustedImm32(0)); |
| } |
| |
| void truncateDoubleToInt32(FPRegisterID src, RegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.cvttsd2si_rr(src, dest); |
| } |
| |
| #if CPU(X86_64) |
| void truncateDoubleToUint32(FPRegisterID src, RegisterID dest) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.cvttsd2siq_rr(src, dest); |
| } |
| #endif |
| |
| // Convert 'src' to an integer, and places the resulting 'dest'. |
| // If the result is not representable as a 32 bit value, branch. |
| // May also branch for some values that are representable in 32 bits |
| // (specifically, in this case, 0). |
| void branchConvertDoubleToInt32(FPRegisterID src, RegisterID dest, JumpList& failureCases, FPRegisterID fpTemp) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.cvttsd2si_rr(src, dest); |
| |
| // If the result is zero, it might have been -0.0, and the double comparison won't catch this! |
| failureCases.append(branchTest32(Zero, dest)); |
| |
| // Convert the integer result back to float & compare to the original value - if not equal or unordered (NaN) then jump. |
| convertInt32ToDouble(dest, fpTemp); |
| m_assembler.ucomisd_rr(fpTemp, src); |
| failureCases.append(m_assembler.jp()); |
| failureCases.append(m_assembler.jne()); |
| } |
| |
| Jump branchDoubleNonZero(FPRegisterID reg, FPRegisterID scratch) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.xorpd_rr(scratch, scratch); |
| return branchDouble(DoubleNotEqual, reg, scratch); |
| } |
| |
| Jump branchDoubleZeroOrNaN(FPRegisterID reg, FPRegisterID scratch) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.xorpd_rr(scratch, scratch); |
| return branchDouble(DoubleEqualOrUnordered, reg, scratch); |
| } |
| |
| void lshiftPacked(TrustedImm32 imm, XMMRegisterID reg) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.psllq_i8r(imm.m_value, reg); |
| } |
| |
| void rshiftPacked(TrustedImm32 imm, XMMRegisterID reg) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.psrlq_i8r(imm.m_value, reg); |
| } |
| |
| void orPacked(XMMRegisterID src, XMMRegisterID dst) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.por_rr(src, dst); |
| } |
| |
| void moveInt32ToPacked(RegisterID src, XMMRegisterID dst) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.movd_rr(src, dst); |
| } |
| |
| void movePackedToInt32(XMMRegisterID src, RegisterID dst) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.movd_rr(src, dst); |
| } |
| |
| // Stack manipulation operations: |
| // |
| // The ABI is assumed to provide a stack abstraction to memory, |
| // containing machine word sized units of data. Push and pop |
| // operations add and remove a single register sized unit of data |
| // to or from the stack. Peek and poke operations read or write |
| // values on the stack, without moving the current stack position. |
| |
| void pop(RegisterID dest) |
| { |
| m_assembler.pop_r(dest); |
| } |
| |
| void push(RegisterID src) |
| { |
| m_assembler.push_r(src); |
| } |
| |
| void push(Address address) |
| { |
| m_assembler.push_m(address.offset, address.base); |
| } |
| |
| void push(TrustedImm32 imm) |
| { |
| m_assembler.push_i32(imm.m_value); |
| } |
| |
| |
| // Register move operations: |
| // |
| // Move values in registers. |
| |
| void move(TrustedImm32 imm, RegisterID dest) |
| { |
| // Note: on 64-bit the TrustedImm32 value is zero extended into the register, it |
| // may be useful to have a separate version that sign extends the value? |
| if (!imm.m_value) |
| m_assembler.xorl_rr(dest, dest); |
| else |
| m_assembler.movl_i32r(imm.m_value, dest); |
| } |
| |
| #if CPU(X86_64) |
| void move(RegisterID src, RegisterID dest) |
| { |
| // Note: on 64-bit this is is a full register move; perhaps it would be |
| // useful to have separate move32 & movePtr, with move32 zero extending? |
| if (src != dest) |
| m_assembler.movq_rr(src, dest); |
| } |
| |
| void move(TrustedImmPtr imm, RegisterID dest) |
| { |
| m_assembler.movq_i64r(imm.asIntptr(), dest); |
| } |
| |
| void move(TrustedImm64 imm, RegisterID dest) |
| { |
| m_assembler.movq_i64r(imm.m_value, dest); |
| } |
| |
| void swap(RegisterID reg1, RegisterID reg2) |
| { |
| if (reg1 != reg2) |
| m_assembler.xchgq_rr(reg1, reg2); |
| } |
| |
| void signExtend32ToPtr(RegisterID src, RegisterID dest) |
| { |
| m_assembler.movsxd_rr(src, dest); |
| } |
| |
| void zeroExtend32ToPtr(RegisterID src, RegisterID dest) |
| { |
| m_assembler.movl_rr(src, dest); |
| } |
| #else |
| void move(RegisterID src, RegisterID dest) |
| { |
| if (src != dest) |
| m_assembler.movl_rr(src, dest); |
| } |
| |
| void move(TrustedImmPtr imm, RegisterID dest) |
| { |
| m_assembler.movl_i32r(imm.asIntptr(), dest); |
| } |
| |
| void swap(RegisterID reg1, RegisterID reg2) |
| { |
| if (reg1 != reg2) |
| m_assembler.xchgl_rr(reg1, reg2); |
| } |
| |
| void signExtend32ToPtr(RegisterID src, RegisterID dest) |
| { |
| move(src, dest); |
| } |
| |
| void zeroExtend32ToPtr(RegisterID src, RegisterID dest) |
| { |
| move(src, dest); |
| } |
| #endif |
| |
| |
| // Forwards / external control flow operations: |
| // |
| // This set of jump and conditional branch operations return a Jump |
| // object which may linked at a later point, allow forwards jump, |
| // or jumps that will require external linkage (after the code has been |
| // relocated). |
| // |
| // For branches, signed <, >, <= and >= are denoted as l, g, le, and ge |
| // respecitvely, for unsigned comparisons the names b, a, be, and ae are |
| // used (representing the names 'below' and 'above'). |
| // |
| // Operands to the comparision are provided in the expected order, e.g. |
| // jle32(reg1, TrustedImm32(5)) will branch if the value held in reg1, when |
| // treated as a signed 32bit value, is less than or equal to 5. |
| // |
| // jz and jnz test whether the first operand is equal to zero, and take |
| // an optional second operand of a mask under which to perform the test. |
| |
| public: |
| Jump branch8(RelationalCondition cond, Address left, TrustedImm32 right) |
| { |
| m_assembler.cmpb_im(right.m_value, left.offset, left.base); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branch32(RelationalCondition cond, RegisterID left, RegisterID right) |
| { |
| m_assembler.cmpl_rr(right, left); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branch32(RelationalCondition cond, RegisterID left, TrustedImm32 right) |
| { |
| if (((cond == Equal) || (cond == NotEqual)) && !right.m_value) |
| m_assembler.testl_rr(left, left); |
| else |
| m_assembler.cmpl_ir(right.m_value, left); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branch32(RelationalCondition cond, RegisterID left, Address right) |
| { |
| m_assembler.cmpl_mr(right.offset, right.base, left); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branch32(RelationalCondition cond, Address left, RegisterID right) |
| { |
| m_assembler.cmpl_rm(right, left.offset, left.base); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branch32(RelationalCondition cond, Address left, TrustedImm32 right) |
| { |
| m_assembler.cmpl_im(right.m_value, left.offset, left.base); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branch32(RelationalCondition cond, BaseIndex left, TrustedImm32 right) |
| { |
| m_assembler.cmpl_im(right.m_value, left.offset, left.base, left.index, left.scale); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branch32WithUnalignedHalfWords(RelationalCondition cond, BaseIndex left, TrustedImm32 right) |
| { |
| return branch32(cond, left, right); |
| } |
| |
| Jump branchTest32(ResultCondition cond, RegisterID reg, RegisterID mask) |
| { |
| m_assembler.testl_rr(reg, mask); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchTest32(ResultCondition cond, RegisterID reg, TrustedImm32 mask = TrustedImm32(-1)) |
| { |
| // if we are only interested in the low seven bits, this can be tested with a testb |
| if (mask.m_value == -1) |
| m_assembler.testl_rr(reg, reg); |
| else |
| m_assembler.testl_i32r(mask.m_value, reg); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchTest32(ResultCondition cond, Address address, TrustedImm32 mask = TrustedImm32(-1)) |
| { |
| if (mask.m_value == -1) |
| m_assembler.cmpl_im(0, address.offset, address.base); |
| else |
| m_assembler.testl_i32m(mask.m_value, address.offset, address.base); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchTest32(ResultCondition cond, BaseIndex address, TrustedImm32 mask = TrustedImm32(-1)) |
| { |
| if (mask.m_value == -1) |
| m_assembler.cmpl_im(0, address.offset, address.base, address.index, address.scale); |
| else |
| m_assembler.testl_i32m(mask.m_value, address.offset, address.base, address.index, address.scale); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchTest8(ResultCondition cond, Address address, TrustedImm32 mask = TrustedImm32(-1)) |
| { |
| // Byte in TrustedImm32 is not well defined, so be a little permisive here, but don't accept nonsense values. |
| ASSERT(mask.m_value >= -128 && mask.m_value <= 255); |
| if (mask.m_value == -1) |
| m_assembler.cmpb_im(0, address.offset, address.base); |
| else |
| m_assembler.testb_im(mask.m_value, address.offset, address.base); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchTest8(ResultCondition cond, BaseIndex address, TrustedImm32 mask = TrustedImm32(-1)) |
| { |
| // Byte in TrustedImm32 is not well defined, so be a little permisive here, but don't accept nonsense values. |
| ASSERT(mask.m_value >= -128 && mask.m_value <= 255); |
| if (mask.m_value == -1) |
| m_assembler.cmpb_im(0, address.offset, address.base, address.index, address.scale); |
| else |
| m_assembler.testb_im(mask.m_value, address.offset, address.base, address.index, address.scale); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branch8(RelationalCondition cond, BaseIndex left, TrustedImm32 right) |
| { |
| ASSERT(!(right.m_value & 0xFFFFFF00)); |
| |
| m_assembler.cmpb_im(right.m_value, left.offset, left.base, left.index, left.scale); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump jump() |
| { |
| return Jump(m_assembler.jmp()); |
| } |
| |
| void jump(RegisterID target) |
| { |
| m_assembler.jmp_r(target); |
| } |
| |
| // Address is a memory location containing the address to jump to |
| void jump(Address address) |
| { |
| m_assembler.jmp_m(address.offset, address.base); |
| } |
| |
| |
| // Arithmetic control flow operations: |
| // |
| // This set of conditional branch operations branch based |
| // on the result of an arithmetic operation. The operation |
| // is performed as normal, storing the result. |
| // |
| // * jz operations branch if the result is zero. |
| // * jo operations branch if the (signed) arithmetic |
| // operation caused an overflow to occur. |
| |
| Jump branchAdd32(ResultCondition cond, RegisterID src, RegisterID dest) |
| { |
| add32(src, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchAdd32(ResultCondition cond, TrustedImm32 imm, RegisterID dest) |
| { |
| add32(imm, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchAdd32(ResultCondition cond, TrustedImm32 src, Address dest) |
| { |
| add32(src, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchAdd32(ResultCondition cond, RegisterID src, Address dest) |
| { |
| add32(src, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchAdd32(ResultCondition cond, Address src, RegisterID dest) |
| { |
| add32(src, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchAdd32(ResultCondition cond, RegisterID src1, RegisterID src2, RegisterID dest) |
| { |
| if (src1 == dest) |
| return branchAdd32(cond, src2, dest); |
| move(src2, dest); |
| return branchAdd32(cond, src1, dest); |
| } |
| |
| Jump branchAdd32(ResultCondition cond, RegisterID src, TrustedImm32 imm, RegisterID dest) |
| { |
| move(src, dest); |
| return branchAdd32(cond, imm, dest); |
| } |
| |
| Jump branchMul32(ResultCondition cond, RegisterID src, RegisterID dest) |
| { |
| mul32(src, dest); |
| if (cond != Overflow) |
| m_assembler.testl_rr(dest, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchMul32(ResultCondition cond, Address src, RegisterID dest) |
| { |
| mul32(src, dest); |
| if (cond != Overflow) |
| m_assembler.testl_rr(dest, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchMul32(ResultCondition cond, TrustedImm32 imm, RegisterID src, RegisterID dest) |
| { |
| mul32(imm, src, dest); |
| if (cond != Overflow) |
| m_assembler.testl_rr(dest, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchMul32(ResultCondition cond, RegisterID src1, RegisterID src2, RegisterID dest) |
| { |
| if (src1 == dest) |
| return branchMul32(cond, src2, dest); |
| move(src2, dest); |
| return branchMul32(cond, src1, dest); |
| } |
| |
| Jump branchSub32(ResultCondition cond, RegisterID src, RegisterID dest) |
| { |
| sub32(src, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchSub32(ResultCondition cond, TrustedImm32 imm, RegisterID dest) |
| { |
| sub32(imm, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchSub32(ResultCondition cond, TrustedImm32 imm, Address dest) |
| { |
| sub32(imm, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchSub32(ResultCondition cond, RegisterID src, Address dest) |
| { |
| sub32(src, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchSub32(ResultCondition cond, Address src, RegisterID dest) |
| { |
| sub32(src, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchSub32(ResultCondition cond, RegisterID src1, RegisterID src2, RegisterID dest) |
| { |
| // B := A - B is invalid. |
| ASSERT(src1 == dest || src2 != dest); |
| |
| move(src1, dest); |
| return branchSub32(cond, src2, dest); |
| } |
| |
| Jump branchSub32(ResultCondition cond, RegisterID src1, TrustedImm32 src2, RegisterID dest) |
| { |
| move(src1, dest); |
| return branchSub32(cond, src2, dest); |
| } |
| |
| Jump branchNeg32(ResultCondition cond, RegisterID srcDest) |
| { |
| neg32(srcDest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchOr32(ResultCondition cond, RegisterID src, RegisterID dest) |
| { |
| or32(src, dest); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| |
| // Miscellaneous operations: |
| |
| void breakpoint() |
| { |
| m_assembler.int3(); |
| } |
| |
| Call nearCall() |
| { |
| return Call(m_assembler.call(), Call::LinkableNear); |
| } |
| |
| Call call(RegisterID target) |
| { |
| return Call(m_assembler.call(target), Call::None); |
| } |
| |
| void call(Address address) |
| { |
| m_assembler.call_m(address.offset, address.base); |
| } |
| |
| void ret() |
| { |
| m_assembler.ret(); |
| } |
| |
| void compare8(RelationalCondition cond, Address left, TrustedImm32 right, RegisterID dest) |
| { |
| m_assembler.cmpb_im(right.m_value, left.offset, left.base); |
| set32(x86Condition(cond), dest); |
| } |
| |
| void compare32(RelationalCondition cond, RegisterID left, RegisterID right, RegisterID dest) |
| { |
| m_assembler.cmpl_rr(right, left); |
| set32(x86Condition(cond), dest); |
| } |
| |
| void compare32(RelationalCondition cond, RegisterID left, TrustedImm32 right, RegisterID dest) |
| { |
| if (((cond == Equal) || (cond == NotEqual)) && !right.m_value) |
| m_assembler.testl_rr(left, left); |
| else |
| m_assembler.cmpl_ir(right.m_value, left); |
| set32(x86Condition(cond), dest); |
| } |
| |
| // FIXME: |
| // The mask should be optional... perhaps the argument order should be |
| // dest-src, operations always have a dest? ... possibly not true, considering |
| // asm ops like test, or pseudo ops like pop(). |
| |
| void test8(ResultCondition cond, Address address, TrustedImm32 mask, RegisterID dest) |
| { |
| if (mask.m_value == -1) |
| m_assembler.cmpb_im(0, address.offset, address.base); |
| else |
| m_assembler.testb_im(mask.m_value, address.offset, address.base); |
| set32(x86Condition(cond), dest); |
| } |
| |
| void test32(ResultCondition cond, Address address, TrustedImm32 mask, RegisterID dest) |
| { |
| if (mask.m_value == -1) |
| m_assembler.cmpl_im(0, address.offset, address.base); |
| else |
| m_assembler.testl_i32m(mask.m_value, address.offset, address.base); |
| set32(x86Condition(cond), dest); |
| } |
| |
| // Invert a relational condition, e.g. == becomes !=, < becomes >=, etc. |
| static RelationalCondition invert(RelationalCondition cond) |
| { |
| return static_cast<RelationalCondition>(cond ^ 1); |
| } |
| |
| void nop() |
| { |
| m_assembler.nop(); |
| } |
| |
| static void replaceWithJump(CodeLocationLabel instructionStart, CodeLocationLabel destination) |
| { |
| X86Assembler::replaceWithJump(instructionStart.executableAddress(), destination.executableAddress()); |
| } |
| |
| static ptrdiff_t maxJumpReplacementSize() |
| { |
| return X86Assembler::maxJumpReplacementSize(); |
| } |
| |
| protected: |
| X86Assembler::Condition x86Condition(RelationalCondition cond) |
| { |
| return static_cast<X86Assembler::Condition>(cond); |
| } |
| |
| X86Assembler::Condition x86Condition(ResultCondition cond) |
| { |
| return static_cast<X86Assembler::Condition>(cond); |
| } |
| |
| void set32(X86Assembler::Condition cond, RegisterID dest) |
| { |
| #if CPU(X86) |
| // On 32-bit x86 we can only set the first 4 registers; |
| // esp..edi are mapped to the 'h' registers! |
| if (dest >= 4) { |
| m_assembler.xchgl_rr(dest, X86Registers::eax); |
| m_assembler.setCC_r(cond, X86Registers::eax); |
| m_assembler.movzbl_rr(X86Registers::eax, X86Registers::eax); |
| m_assembler.xchgl_rr(dest, X86Registers::eax); |
| return; |
| } |
| #endif |
| m_assembler.setCC_r(cond, dest); |
| m_assembler.movzbl_rr(dest, dest); |
| } |
| |
| private: |
| // Only MacroAssemblerX86 should be using the following method; SSE2 is always available on |
| // x86_64, and clients & subclasses of MacroAssembler should be using 'supportsFloatingPoint()'. |
| friend class MacroAssemblerX86; |
| |
| #if CPU(X86) |
| #if OS(MAC_OS_X) |
| |
| // All X86 Macs are guaranteed to support at least SSE2, |
| static bool isSSE2Present() |
| { |
| return true; |
| } |
| |
| #else // OS(MAC_OS_X) |
| |
| enum SSE2CheckState { |
| NotCheckedSSE2, |
| HasSSE2, |
| NoSSE2 |
| }; |
| |
| static bool isSSE2Present() |
| { |
| if (s_sse2CheckState == NotCheckedSSE2) { |
| // Default the flags value to zero; if the compiler is |
| // not MSVC or GCC we will read this as SSE2 not present. |
| int flags = 0; |
| #if COMPILER(MSVC) |
| _asm { |
| mov eax, 1 // cpuid function 1 gives us the standard feature set |
| cpuid; |
| mov flags, edx; |
| } |
| #elif COMPILER(GCC) |
| asm ( |
| "movl $0x1, %%eax;" |
| "pushl %%ebx;" |
| "cpuid;" |
| "popl %%ebx;" |
| "movl %%edx, %0;" |
| : "=g" (flags) |
| : |
| : "%eax", "%ecx", "%edx" |
| ); |
| #endif |
| static const int SSE2FeatureBit = 1 << 26; |
| s_sse2CheckState = (flags & SSE2FeatureBit) ? HasSSE2 : NoSSE2; |
| } |
| // Only check once. |
| ASSERT(s_sse2CheckState != NotCheckedSSE2); |
| |
| return s_sse2CheckState == HasSSE2; |
| } |
| |
| static SSE2CheckState s_sse2CheckState; |
| |
| #endif // OS(MAC_OS_X) |
| #elif !defined(NDEBUG) // CPU(X86) |
| |
| // On x86-64 we should never be checking for SSE2 in a non-debug build, |
| // but non debug add this method to keep the asserts above happy. |
| static bool isSSE2Present() |
| { |
| return true; |
| } |
| |
| #endif |
| }; |
| |
| } // namespace JSC |
| |
| #endif // ENABLE(ASSEMBLER) |
| |
| #endif // MacroAssemblerX86Common_h |
