| /* |
| * 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 MacroAssemblerX86_h |
| #define MacroAssemblerX86_h |
| |
| #if ENABLE(ASSEMBLER) && CPU(X86) |
| |
| #include "MacroAssemblerX86Common.h" |
| |
| namespace JSC { |
| |
| class MacroAssemblerX86 : public MacroAssemblerX86Common { |
| public: |
| static const Scale ScalePtr = TimesFour; |
| |
| using MacroAssemblerX86Common::add32; |
| using MacroAssemblerX86Common::and32; |
| using MacroAssemblerX86Common::branchAdd32; |
| using MacroAssemblerX86Common::branchSub32; |
| using MacroAssemblerX86Common::sub32; |
| using MacroAssemblerX86Common::or32; |
| using MacroAssemblerX86Common::load32; |
| using MacroAssemblerX86Common::store32; |
| using MacroAssemblerX86Common::store8; |
| using MacroAssemblerX86Common::branch32; |
| using MacroAssemblerX86Common::call; |
| using MacroAssemblerX86Common::jump; |
| using MacroAssemblerX86Common::addDouble; |
| using MacroAssemblerX86Common::loadDouble; |
| using MacroAssemblerX86Common::storeDouble; |
| using MacroAssemblerX86Common::convertInt32ToDouble; |
| using MacroAssemblerX86Common::branchTest8; |
| |
| void add32(TrustedImm32 imm, RegisterID src, RegisterID dest) |
| { |
| m_assembler.leal_mr(imm.m_value, src, dest); |
| } |
| |
| void add32(TrustedImm32 imm, AbsoluteAddress address) |
| { |
| m_assembler.addl_im(imm.m_value, address.m_ptr); |
| } |
| |
| void add32(AbsoluteAddress address, RegisterID dest) |
| { |
| m_assembler.addl_mr(address.m_ptr, dest); |
| } |
| |
| void add64(TrustedImm32 imm, AbsoluteAddress address) |
| { |
| m_assembler.addl_im(imm.m_value, address.m_ptr); |
| m_assembler.adcl_im(imm.m_value >> 31, reinterpret_cast<const char*>(address.m_ptr) + sizeof(int32_t)); |
| } |
| |
| void and32(TrustedImm32 imm, AbsoluteAddress address) |
| { |
| m_assembler.andl_im(imm.m_value, address.m_ptr); |
| } |
| |
| void or32(TrustedImm32 imm, AbsoluteAddress address) |
| { |
| m_assembler.orl_im(imm.m_value, address.m_ptr); |
| } |
| |
| void or32(RegisterID reg, AbsoluteAddress address) |
| { |
| m_assembler.orl_rm(reg, address.m_ptr); |
| } |
| |
| void sub32(TrustedImm32 imm, AbsoluteAddress address) |
| { |
| m_assembler.subl_im(imm.m_value, address.m_ptr); |
| } |
| |
| void load32(const void* address, RegisterID dest) |
| { |
| m_assembler.movl_mr(address, dest); |
| } |
| |
| ConvertibleLoadLabel convertibleLoadPtr(Address address, RegisterID dest) |
| { |
| ConvertibleLoadLabel result = ConvertibleLoadLabel(this); |
| m_assembler.movl_mr(address.offset, address.base, dest); |
| return result; |
| } |
| |
| void addDouble(AbsoluteAddress address, FPRegisterID dest) |
| { |
| m_assembler.addsd_mr(address.m_ptr, dest); |
| } |
| |
| void storeDouble(FPRegisterID src, const void* address) |
| { |
| ASSERT(isSSE2Present()); |
| m_assembler.movsd_rm(src, address); |
| } |
| |
| void convertInt32ToDouble(AbsoluteAddress src, FPRegisterID dest) |
| { |
| m_assembler.cvtsi2sd_mr(src.m_ptr, dest); |
| } |
| |
| void store32(TrustedImm32 imm, void* address) |
| { |
| m_assembler.movl_i32m(imm.m_value, address); |
| } |
| |
| void store32(RegisterID src, void* address) |
| { |
| m_assembler.movl_rm(src, address); |
| } |
| |
| void store8(TrustedImm32 imm, void* address) |
| { |
| ASSERT(-128 <= imm.m_value && imm.m_value < 128); |
| m_assembler.movb_i8m(imm.m_value, address); |
| } |
| |
| // Possibly clobbers src. |
| void moveDoubleToInts(FPRegisterID src, RegisterID dest1, RegisterID dest2) |
| { |
| movePackedToInt32(src, dest1); |
| rshiftPacked(TrustedImm32(32), src); |
| movePackedToInt32(src, dest2); |
| } |
| |
| void moveIntsToDouble(RegisterID src1, RegisterID src2, FPRegisterID dest, FPRegisterID scratch) |
| { |
| moveInt32ToPacked(src1, dest); |
| moveInt32ToPacked(src2, scratch); |
| lshiftPacked(TrustedImm32(32), scratch); |
| orPacked(scratch, dest); |
| } |
| |
| Jump branchAdd32(ResultCondition cond, TrustedImm32 imm, AbsoluteAddress dest) |
| { |
| m_assembler.addl_im(imm.m_value, dest.m_ptr); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchSub32(ResultCondition cond, TrustedImm32 imm, AbsoluteAddress dest) |
| { |
| m_assembler.subl_im(imm.m_value, dest.m_ptr); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branch32(RelationalCondition cond, AbsoluteAddress left, RegisterID right) |
| { |
| m_assembler.cmpl_rm(right, left.m_ptr); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branch32(RelationalCondition cond, AbsoluteAddress left, TrustedImm32 right) |
| { |
| m_assembler.cmpl_im(right.m_value, left.m_ptr); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Call call() |
| { |
| return Call(m_assembler.call(), Call::Linkable); |
| } |
| |
| // Address is a memory location containing the address to jump to |
| void jump(AbsoluteAddress address) |
| { |
| m_assembler.jmp_m(address.m_ptr); |
| } |
| |
| Call tailRecursiveCall() |
| { |
| return Call::fromTailJump(jump()); |
| } |
| |
| Call makeTailRecursiveCall(Jump oldJump) |
| { |
| return Call::fromTailJump(oldJump); |
| } |
| |
| |
| DataLabelPtr moveWithPatch(TrustedImmPtr initialValue, RegisterID dest) |
| { |
| padBeforePatch(); |
| m_assembler.movl_i32r(initialValue.asIntptr(), dest); |
| return DataLabelPtr(this); |
| } |
| |
| Jump branchTest8(ResultCondition cond, AbsoluteAddress address, TrustedImm32 mask = TrustedImm32(-1)) |
| { |
| ASSERT(mask.m_value >= -128 && mask.m_value <= 255); |
| if (mask.m_value == -1) |
| m_assembler.cmpb_im(0, address.m_ptr); |
| else |
| m_assembler.testb_im(mask.m_value, address.m_ptr); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchPtrWithPatch(RelationalCondition cond, RegisterID left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(0)) |
| { |
| padBeforePatch(); |
| m_assembler.cmpl_ir_force32(initialRightValue.asIntptr(), left); |
| dataLabel = DataLabelPtr(this); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| Jump branchPtrWithPatch(RelationalCondition cond, Address left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(0)) |
| { |
| padBeforePatch(); |
| m_assembler.cmpl_im_force32(initialRightValue.asIntptr(), left.offset, left.base); |
| dataLabel = DataLabelPtr(this); |
| return Jump(m_assembler.jCC(x86Condition(cond))); |
| } |
| |
| DataLabelPtr storePtrWithPatch(TrustedImmPtr initialValue, ImplicitAddress address) |
| { |
| padBeforePatch(); |
| m_assembler.movl_i32m(initialValue.asIntptr(), address.offset, address.base); |
| return DataLabelPtr(this); |
| } |
| |
| static bool supportsFloatingPoint() { return isSSE2Present(); } |
| // See comment on MacroAssemblerARMv7::supportsFloatingPointTruncate() |
| static bool supportsFloatingPointTruncate() { return isSSE2Present(); } |
| static bool supportsFloatingPointSqrt() { return isSSE2Present(); } |
| static bool supportsFloatingPointAbs() { return isSSE2Present(); } |
| |
| static FunctionPtr readCallTarget(CodeLocationCall call) |
| { |
| intptr_t offset = reinterpret_cast<int32_t*>(call.dataLocation())[-1]; |
| return FunctionPtr(reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(call.dataLocation()) + offset)); |
| } |
| |
| static bool canJumpReplacePatchableBranchPtrWithPatch() { return true; } |
| |
| static CodeLocationLabel startOfBranchPtrWithPatchOnRegister(CodeLocationDataLabelPtr label) |
| { |
| const int opcodeBytes = 1; |
| const int modRMBytes = 1; |
| const int immediateBytes = 4; |
| const int totalBytes = opcodeBytes + modRMBytes + immediateBytes; |
| ASSERT(totalBytes >= maxJumpReplacementSize()); |
| return label.labelAtOffset(-totalBytes); |
| } |
| |
| static CodeLocationLabel startOfPatchableBranchPtrWithPatchOnAddress(CodeLocationDataLabelPtr label) |
| { |
| const int opcodeBytes = 1; |
| const int modRMBytes = 1; |
| const int offsetBytes = 0; |
| const int immediateBytes = 4; |
| const int totalBytes = opcodeBytes + modRMBytes + offsetBytes + immediateBytes; |
| ASSERT(totalBytes >= maxJumpReplacementSize()); |
| return label.labelAtOffset(-totalBytes); |
| } |
| |
| static void revertJumpReplacementToBranchPtrWithPatch(CodeLocationLabel instructionStart, RegisterID reg, void* initialValue) |
| { |
| X86Assembler::revertJumpTo_cmpl_ir_force32(instructionStart.executableAddress(), reinterpret_cast<intptr_t>(initialValue), reg); |
| } |
| |
| static void revertJumpReplacementToPatchableBranchPtrWithPatch(CodeLocationLabel instructionStart, Address address, void* initialValue) |
| { |
| ASSERT(!address.offset); |
| X86Assembler::revertJumpTo_cmpl_im_force32(instructionStart.executableAddress(), reinterpret_cast<intptr_t>(initialValue), 0, address.base); |
| } |
| |
| private: |
| friend class LinkBuffer; |
| friend class RepatchBuffer; |
| |
| static void linkCall(void* code, Call call, FunctionPtr function) |
| { |
| X86Assembler::linkCall(code, call.m_label, function.value()); |
| } |
| |
| static void repatchCall(CodeLocationCall call, CodeLocationLabel destination) |
| { |
| X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress()); |
| } |
| |
| static void repatchCall(CodeLocationCall call, FunctionPtr destination) |
| { |
| X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress()); |
| } |
| }; |
| |
| } // namespace JSC |
| |
| #endif // ENABLE(ASSEMBLER) |
| |
| #endif // MacroAssemblerX86_h |