X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/9bcd318d5fa2a38139c9651d263a06c797529333..ba379fdc102753d6be2c4d937058fe40257329fe:/assembler/MacroAssembler.h diff --git a/assembler/MacroAssembler.h b/assembler/MacroAssembler.h index 9d24653..43d27e7 100644 --- a/assembler/MacroAssembler.h +++ b/assembler/MacroAssembler.h @@ -30,1986 +30,310 @@ #if ENABLE(ASSEMBLER) -#include "X86Assembler.h" +#if PLATFORM_ARM_ARCH(7) +#include "MacroAssemblerARMv7.h" +namespace JSC { typedef MacroAssemblerARMv7 MacroAssemblerBase; }; -namespace JSC { +#elif PLATFORM(X86) +#include "MacroAssemblerX86.h" +namespace JSC { typedef MacroAssemblerX86 MacroAssemblerBase; }; -class MacroAssembler { -protected: - X86Assembler m_assembler; +#elif PLATFORM(X86_64) +#include "MacroAssemblerX86_64.h" +namespace JSC { typedef MacroAssemblerX86_64 MacroAssemblerBase; }; -#if PLATFORM(X86_64) - static const X86::RegisterID scratchRegister = X86::r11; +#else +#error "The MacroAssembler is not supported on this platform." #endif + +namespace JSC { + +class MacroAssembler : public MacroAssemblerBase { public: - typedef X86::RegisterID RegisterID; - - // Note: do not rely on values in this enum, these will change (to 0..3). - enum Scale { - TimesOne = 1, - TimesTwo = 2, - TimesFour = 4, - TimesEight = 8, -#if PLATFORM(X86) - ScalePtr = TimesFour -#endif + + using MacroAssemblerBase::pop; + using MacroAssemblerBase::jump; + using MacroAssemblerBase::branch32; + using MacroAssemblerBase::branch16; #if PLATFORM(X86_64) - ScalePtr = TimesEight + using MacroAssemblerBase::branchPtr; + using MacroAssemblerBase::branchTestPtr; #endif - }; - MacroAssembler() + + // Platform agnostic onvenience functions, + // described in terms of other macro assembly methods. + void pop() { + addPtr(Imm32(sizeof(void*)), stackPointerRegister); } - size_t size() { return m_assembler.size(); } - void* copyCode(ExecutablePool* allocator) + void peek(RegisterID dest, int index = 0) { - return m_assembler.executableCopy(allocator); + loadPtr(Address(stackPointerRegister, (index * sizeof(void*))), dest); } - - // Address: - // - // Describes a simple base-offset address. - struct Address { - explicit Address(RegisterID base, int32_t offset = 0) - : base(base) - , offset(offset) - { - } - - RegisterID base; - int32_t offset; - }; - - // ImplicitAddress: - // - // This class is used for explicit 'load' and 'store' operations - // (as opposed to situations in which a memory operand is provided - // to a generic operation, such as an integer arithmetic instruction). - // - // In the case of a load (or store) operation we want to permit - // addresses to be implicitly constructed, e.g. the two calls: - // - // load32(Address(addrReg), destReg); - // load32(addrReg, destReg); - // - // Are equivalent, and the explicit wrapping of the Address in the former - // is unnecessary. - struct ImplicitAddress { - ImplicitAddress(RegisterID base) - : base(base) - , offset(0) - { - } - - ImplicitAddress(Address address) - : base(address.base) - , offset(address.offset) - { - } - - RegisterID base; - int32_t offset; - }; - - // BaseIndex: - // - // Describes a complex addressing mode. - struct BaseIndex { - BaseIndex(RegisterID base, RegisterID index, Scale scale, int32_t offset = 0) - : base(base) - , index(index) - , scale(scale) - , offset(offset) - { - } - - RegisterID base; - RegisterID index; - Scale scale; - int32_t offset; - }; - - // AbsoluteAddress: - // - // Describes an memory operand given by a pointer. For regular load & store - // operations an unwrapped void* will be used, rather than using this. - struct AbsoluteAddress { - explicit AbsoluteAddress(void* ptr) - : m_ptr(ptr) - { - } - - void* m_ptr; - }; - - - class Jump; - class PatchBuffer; - - // DataLabelPtr: - // - // A DataLabelPtr is used to refer to a location in the code containing a pointer to be - // patched after the code has been generated. - class DataLabelPtr { - friend class MacroAssembler; - friend class PatchBuffer; - - public: - DataLabelPtr() - { - } - - DataLabelPtr(MacroAssembler* masm) - : m_label(masm->m_assembler.label()) - { - } - - static void patch(void* address, void* value) - { - X86Assembler::patchPointer(reinterpret_cast(address), reinterpret_cast(value)); - } - - private: - X86Assembler::JmpDst m_label; - }; - - // DataLabel32: - // - // A DataLabelPtr is used to refer to a location in the code containing a pointer to be - // patched after the code has been generated. - class DataLabel32 { - friend class MacroAssembler; - friend class PatchBuffer; - - public: - DataLabel32() - { - } - - DataLabel32(MacroAssembler* masm) - : m_label(masm->m_assembler.label()) - { - } - - static void patch(void* address, int32_t value) - { - X86Assembler::patchImmediate(reinterpret_cast(address), value); - } - - private: - X86Assembler::JmpDst m_label; - }; - - // Label: - // - // A Label records a point in the generated instruction stream, typically such that - // it may be used as a destination for a jump. - class Label { - friend class Jump; - friend class MacroAssembler; - friend class PatchBuffer; - - public: - Label() - { - } - - Label(MacroAssembler* masm) - : m_label(masm->m_assembler.label()) - { - } - - // FIXME: transitionary method, while we replace JmpSrces with Jumps. - operator X86Assembler::JmpDst() - { - return m_label; - } - - private: - X86Assembler::JmpDst m_label; - }; - - - // Jump: - // - // A jump object is a reference to a jump instruction that has been planted - // into the code buffer - it is typically used to link the jump, setting the - // relative offset such that when executed it will jump to the desired - // destination. - // - // Jump objects retain a pointer to the assembler for syntactic purposes - - // to allow the jump object to be able to link itself, e.g.: - // - // Jump forwardsBranch = jne32(Imm32(0), reg1); - // // ... - // forwardsBranch.link(); - // - // Jumps may also be linked to a Label. - class Jump { - friend class PatchBuffer; - friend class MacroAssembler; - - public: - Jump() - { - } - - // FIXME: transitionary method, while we replace JmpSrces with Jumps. - Jump(X86Assembler::JmpSrc jmp) - : m_jmp(jmp) - { - } - - void link(MacroAssembler* masm) - { - masm->m_assembler.link(m_jmp, masm->m_assembler.label()); - } - - void linkTo(Label label, MacroAssembler* masm) - { - masm->m_assembler.link(m_jmp, label.m_label); - } - - // FIXME: transitionary method, while we replace JmpSrces with Jumps. - operator X86Assembler::JmpSrc() - { - return m_jmp; - } - - static void patch(void* address, void* destination) - { - X86Assembler::patchBranchOffset(reinterpret_cast(address), destination); - } - - private: - X86Assembler::JmpSrc m_jmp; - }; - - // JumpList: - // - // A JumpList is a set of Jump objects. - // All jumps in the set will be linked to the same destination. - class JumpList { - friend class PatchBuffer; - - public: - void link(MacroAssembler* masm) - { - size_t size = m_jumps.size(); - for (size_t i = 0; i < size; ++i) - m_jumps[i].link(masm); - m_jumps.clear(); - } - - void linkTo(Label label, MacroAssembler* masm) - { - size_t size = m_jumps.size(); - for (size_t i = 0; i < size; ++i) - m_jumps[i].linkTo(label, masm); - m_jumps.clear(); - } - - void append(Jump jump) - { - m_jumps.append(jump); - } - - void append(JumpList& other) - { - m_jumps.append(other.m_jumps.begin(), other.m_jumps.size()); - } - - bool empty() - { - return !m_jumps.size(); - } - - private: - Vector m_jumps; - }; - - - // PatchBuffer: - // - // This class assists in linking code generated by the macro assembler, once code generation - // has been completed, and the code has been copied to is final location in memory. At this - // time pointers to labels within the code may be resolved, and relative offsets to external - // addresses may be fixed. - // - // Specifically: - // * Jump objects may be linked to external targets, - // * The address of Jump objects may taken, such that it can later be relinked. - // * The return address of a Jump object representing a call may be acquired. - // * The address of a Label pointing into the code may be resolved. - // * The value referenced by a DataLabel may be fixed. - // - // FIXME: distinguish between Calls & Jumps (make a specific call to obtain the return - // address of calls, as opposed to a point that can be used to later relink a Jump - - // possibly wrap the later up in an object that can do just that). - class PatchBuffer { - public: - PatchBuffer(void* code) - : m_code(code) - { - } - - void link(Jump jump, void* target) - { - X86Assembler::link(m_code, jump.m_jmp, target); - } - - void link(JumpList list, void* target) - { - for (unsigned i = 0; i < list.m_jumps.size(); ++i) - X86Assembler::link(m_code, list.m_jumps[i], target); - } - - void* addressOf(Jump jump) - { - return X86Assembler::getRelocatedAddress(m_code, jump.m_jmp); - } - - void* addressOf(Label label) - { - return X86Assembler::getRelocatedAddress(m_code, label.m_label); - } - - void* addressOf(DataLabelPtr label) - { - return X86Assembler::getRelocatedAddress(m_code, label.m_label); - } - - void* addressOf(DataLabel32 label) - { - return X86Assembler::getRelocatedAddress(m_code, label.m_label); - } - - void setPtr(DataLabelPtr label, void* value) - { - X86Assembler::patchAddress(m_code, label.m_label, value); - } - - private: - void* m_code; - }; - - - // ImmPtr: - // - // A pointer sized immediate operand to an instruction - this is wrapped - // in a class requiring explicit construction in order to differentiate - // from pointers used as absolute addresses to memory operations - struct ImmPtr { - explicit ImmPtr(void* value) - : m_value(value) - { - } - - intptr_t asIntptr() - { - return reinterpret_cast(m_value); - } - - void* m_value; - }; - - - // Imm32: - // - // A 32bit immediate operand to an instruction - this is wrapped in a - // class requiring explicit construction in order to prevent RegisterIDs - // (which are implemented as an enum) from accidentally being passed as - // immediate values. - struct Imm32 { - explicit Imm32(int32_t value) - : m_value(value) - { - } - -#if PLATFORM(X86) - explicit Imm32(ImmPtr ptr) - : m_value(ptr.asIntptr()) - { - } -#endif - - int32_t m_value; - }; - - // Integer arithmetic operations: - // - // Operations are typically two operand - operation(source, srcDst) - // For many operations the source may be an Imm32, the srcDst operand - // may often be a memory location (explictly described using an Address - // object). - - void addPtr(RegisterID src, RegisterID dest) + void poke(RegisterID src, int index = 0) { -#if PLATFORM(X86_64) - m_assembler.addq_rr(src, dest); -#else - add32(src, dest); -#endif + storePtr(src, Address(stackPointerRegister, (index * sizeof(void*)))); } - void addPtr(Imm32 imm, RegisterID srcDest) + void poke(Imm32 value, int index = 0) { -#if PLATFORM(X86_64) - m_assembler.addq_ir(imm.m_value, srcDest); -#else - add32(imm, srcDest); -#endif + store32(value, Address(stackPointerRegister, (index * sizeof(void*)))); } - void addPtr(ImmPtr imm, RegisterID dest) + void poke(ImmPtr imm, int index = 0) { -#if PLATFORM(X86_64) - move(imm, scratchRegister); - m_assembler.addq_rr(scratchRegister, dest); -#else - add32(Imm32(imm), dest); -#endif + storePtr(imm, Address(stackPointerRegister, (index * sizeof(void*)))); } - void addPtr(Imm32 imm, RegisterID src, RegisterID dest) - { - m_assembler.leal_mr(imm.m_value, src, dest); - } - void add32(RegisterID src, RegisterID dest) + // Backwards banches, these are currently all implemented using existing forwards branch mechanisms. + void branchPtr(Condition cond, RegisterID op1, ImmPtr imm, Label target) { - m_assembler.addl_rr(src, dest); + branchPtr(cond, op1, imm).linkTo(target, this); } - void add32(Imm32 imm, Address address) + void branch32(Condition cond, RegisterID op1, RegisterID op2, Label target) { - m_assembler.addl_im(imm.m_value, address.offset, address.base); + branch32(cond, op1, op2).linkTo(target, this); } - void add32(Imm32 imm, RegisterID dest) + void branch32(Condition cond, RegisterID op1, Imm32 imm, Label target) { - m_assembler.addl_ir(imm.m_value, dest); + branch32(cond, op1, imm).linkTo(target, this); } - - void add32(Imm32 imm, AbsoluteAddress address) + + void branch32(Condition cond, RegisterID left, Address right, Label target) { -#if PLATFORM(X86_64) - move(ImmPtr(address.m_ptr), scratchRegister); - add32(imm, Address(scratchRegister)); -#else - m_assembler.addl_im(imm.m_value, address.m_ptr); -#endif + branch32(cond, left, right).linkTo(target, this); } - - void add32(Address src, RegisterID dest) + + void branch16(Condition cond, BaseIndex left, RegisterID right, Label target) { - m_assembler.addl_mr(src.offset, src.base, dest); + branch16(cond, left, right).linkTo(target, this); } - void andPtr(RegisterID src, RegisterID dest) + void branchTestPtr(Condition cond, RegisterID reg, Label target) { -#if PLATFORM(X86_64) - m_assembler.andq_rr(src, dest); -#else - and32(src, dest); -#endif + branchTestPtr(cond, reg).linkTo(target, this); } - void andPtr(Imm32 imm, RegisterID srcDest) + void jump(Label target) { -#if PLATFORM(X86_64) - m_assembler.andq_ir(imm.m_value, srcDest); -#else - and32(imm, srcDest); -#endif + jump().linkTo(target, this); } - void and32(RegisterID src, RegisterID dest) - { - m_assembler.andl_rr(src, dest); - } - void and32(Imm32 imm, RegisterID dest) + // Ptr methods + // On 32-bit platforms (i.e. x86), these methods directly map onto their 32-bit equivalents. +#if !PLATFORM(X86_64) + void addPtr(RegisterID src, RegisterID dest) { - m_assembler.andl_ir(imm.m_value, dest); + add32(src, dest); } - void lshift32(Imm32 imm, RegisterID dest) - { - m_assembler.shll_i8r(imm.m_value, dest); - } - - void lshift32(RegisterID shift_amount, RegisterID dest) + void addPtr(Imm32 imm, RegisterID srcDest) { - // 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 (shift_amount != X86::ecx) { - swap(shift_amount, X86::ecx); - - // E.g. transform "shll %eax, %eax" -> "xchgl %eax, %ecx; shll %ecx, %ecx; xchgl %eax, %ecx" - if (dest == shift_amount) - m_assembler.shll_CLr(X86::ecx); - // E.g. transform "shll %eax, %ecx" -> "xchgl %eax, %ecx; shll %ecx, %eax; xchgl %eax, %ecx" - else if (dest == X86::ecx) - m_assembler.shll_CLr(shift_amount); - // E.g. transform "shll %eax, %ebx" -> "xchgl %eax, %ecx; shll %ecx, %ebx; xchgl %eax, %ecx" - else - m_assembler.shll_CLr(dest); - - swap(shift_amount, X86::ecx); - } else - m_assembler.shll_CLr(dest); + add32(imm, srcDest); } - - // Take the value from dividend, divide it by divisor, and put the remainder in remainder. - // For now, this operation has specific register requirements, and the three register must - // be unique. It is unfortunate to expose this in the MacroAssembler interface, however - // given the complexity to fix, the fact that it is not uncommmon for processors to have - // specific register requirements on this operation (e.g. Mips result in 'hi'), or to not - // support a hardware divide at all, it may not be - void mod32(RegisterID divisor, RegisterID dividend, RegisterID remainder) - { -#ifdef NDEBUG -#pragma unused(dividend,remainder) -#else - ASSERT((dividend == X86::eax) && (remainder == X86::edx)); - ASSERT((dividend != divisor) && (remainder != divisor)); -#endif - m_assembler.cdq(); - m_assembler.idivl_r(divisor); + void addPtr(ImmPtr imm, RegisterID dest) + { + add32(Imm32(imm), dest); } - void mul32(RegisterID src, RegisterID dest) + void addPtr(Imm32 imm, RegisterID src, RegisterID dest) { - m_assembler.imull_rr(src, dest); + add32(imm, src, dest); } - - void mul32(Imm32 imm, RegisterID src, RegisterID dest) + + void andPtr(RegisterID src, RegisterID dest) { - m_assembler.imull_i32r(src, imm.m_value, dest); + and32(src, dest); } - - void not32(RegisterID srcDest) + + void andPtr(Imm32 imm, RegisterID srcDest) { - m_assembler.notl_r(srcDest); + and32(imm, srcDest); } - + void orPtr(RegisterID src, RegisterID dest) { -#if PLATFORM(X86_64) - m_assembler.orq_rr(src, dest); -#else or32(src, dest); -#endif } void orPtr(ImmPtr imm, RegisterID dest) { -#if PLATFORM(X86_64) - move(imm, scratchRegister); - m_assembler.orq_rr(scratchRegister, dest); -#else or32(Imm32(imm), dest); -#endif } void orPtr(Imm32 imm, RegisterID dest) { -#if PLATFORM(X86_64) - m_assembler.orq_ir(imm.m_value, dest); -#else or32(imm, dest); -#endif - } - - void or32(RegisterID src, RegisterID dest) - { - m_assembler.orl_rr(src, dest); - } - - void or32(Imm32 imm, RegisterID dest) - { - m_assembler.orl_ir(imm.m_value, dest); } void rshiftPtr(RegisterID shift_amount, RegisterID dest) { -#if PLATFORM(X86_64) - // 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 (shift_amount != X86::ecx) { - swap(shift_amount, X86::ecx); - - // E.g. transform "shll %eax, %eax" -> "xchgl %eax, %ecx; shll %ecx, %ecx; xchgl %eax, %ecx" - if (dest == shift_amount) - m_assembler.sarq_CLr(X86::ecx); - // E.g. transform "shll %eax, %ecx" -> "xchgl %eax, %ecx; shll %ecx, %eax; xchgl %eax, %ecx" - else if (dest == X86::ecx) - m_assembler.sarq_CLr(shift_amount); - // E.g. transform "shll %eax, %ebx" -> "xchgl %eax, %ecx; shll %ecx, %ebx; xchgl %eax, %ecx" - else - m_assembler.sarq_CLr(dest); - - swap(shift_amount, X86::ecx); - } else - m_assembler.sarq_CLr(dest); -#else rshift32(shift_amount, dest); -#endif } void rshiftPtr(Imm32 imm, RegisterID dest) { -#if PLATFORM(X86_64) - m_assembler.sarq_i8r(imm.m_value, dest); -#else rshift32(imm, dest); -#endif - } - - void rshift32(RegisterID shift_amount, RegisterID dest) - { - // 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 (shift_amount != X86::ecx) { - swap(shift_amount, X86::ecx); - - // E.g. transform "shll %eax, %eax" -> "xchgl %eax, %ecx; shll %ecx, %ecx; xchgl %eax, %ecx" - if (dest == shift_amount) - m_assembler.sarl_CLr(X86::ecx); - // E.g. transform "shll %eax, %ecx" -> "xchgl %eax, %ecx; shll %ecx, %eax; xchgl %eax, %ecx" - else if (dest == X86::ecx) - m_assembler.sarl_CLr(shift_amount); - // E.g. transform "shll %eax, %ebx" -> "xchgl %eax, %ecx; shll %ecx, %ebx; xchgl %eax, %ecx" - else - m_assembler.sarl_CLr(dest); - - swap(shift_amount, X86::ecx); - } else - m_assembler.sarl_CLr(dest); - } - - void rshift32(Imm32 imm, RegisterID dest) - { - m_assembler.sarl_i8r(imm.m_value, dest); } void subPtr(RegisterID src, RegisterID dest) { -#if PLATFORM(X86_64) - m_assembler.subq_rr(src, dest); -#else sub32(src, dest); -#endif } void subPtr(Imm32 imm, RegisterID dest) { -#if PLATFORM(X86_64) - m_assembler.subq_ir(imm.m_value, dest); -#else sub32(imm, dest); -#endif } void subPtr(ImmPtr imm, RegisterID dest) { -#if PLATFORM(X86_64) - move(imm, scratchRegister); - m_assembler.subq_rr(scratchRegister, dest); -#else sub32(Imm32(imm), dest); -#endif - } - - void sub32(RegisterID src, RegisterID dest) - { - m_assembler.subl_rr(src, dest); - } - - void sub32(Imm32 imm, RegisterID dest) - { - m_assembler.subl_ir(imm.m_value, dest); - } - - void sub32(Imm32 imm, Address address) - { - m_assembler.subl_im(imm.m_value, address.offset, address.base); - } - - void sub32(Imm32 imm, AbsoluteAddress address) - { -#if PLATFORM(X86_64) - move(ImmPtr(address.m_ptr), scratchRegister); - sub32(imm, Address(scratchRegister)); -#else - m_assembler.subl_im(imm.m_value, address.m_ptr); -#endif - } - - void sub32(Address src, RegisterID dest) - { - m_assembler.subl_mr(src.offset, src.base, dest); } void xorPtr(RegisterID src, RegisterID dest) { -#if PLATFORM(X86_64) - m_assembler.xorq_rr(src, dest); -#else xor32(src, dest); -#endif } void xorPtr(Imm32 imm, RegisterID srcDest) { -#if PLATFORM(X86_64) - m_assembler.xorq_ir(imm.m_value, srcDest); -#else xor32(imm, srcDest); -#endif - } - - void xor32(RegisterID src, RegisterID dest) - { - m_assembler.xorl_rr(src, dest); - } - - void xor32(Imm32 imm, RegisterID srcDest) - { - m_assembler.xorl_ir(imm.m_value, srcDest); } - - // 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 Imm32. Address - // operand objects to loads and store will be implicitly constructed if a - // register is passed. void loadPtr(ImplicitAddress address, RegisterID dest) { -#if PLATFORM(X86_64) - m_assembler.movq_mr(address.offset, address.base, dest); -#else load32(address, dest); -#endif - } - - DataLabel32 loadPtrWithAddressOffsetPatch(Address address, RegisterID dest) - { -#if PLATFORM(X86_64) - m_assembler.movq_mr_disp32(address.offset, address.base, dest); - return DataLabel32(this); -#else - m_assembler.movl_mr_disp32(address.offset, address.base, dest); - return DataLabel32(this); -#endif } void loadPtr(BaseIndex address, RegisterID dest) { -#if PLATFORM(X86_64) - m_assembler.movq_mr(address.offset, address.base, address.index, address.scale, dest); -#else load32(address, dest); -#endif } void loadPtr(void* address, RegisterID dest) { -#if PLATFORM(X86_64) - if (dest == X86::eax) - m_assembler.movq_mEAX(address); - else { - move(X86::eax, dest); - m_assembler.movq_mEAX(address); - swap(X86::eax, dest); - } -#else load32(address, dest); -#endif - } - - 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 load32(void* address, RegisterID dest) + DataLabel32 loadPtrWithAddressOffsetPatch(Address address, RegisterID dest) { -#if PLATFORM(X86_64) - if (dest == X86::eax) - m_assembler.movl_mEAX(address); - else { - move(X86::eax, dest); - m_assembler.movl_mEAX(address); - swap(X86::eax, dest); - } -#else - m_assembler.movl_mr(address, dest); -#endif + return load32WithAddressOffsetPatch(address, dest); } - void load16(BaseIndex address, RegisterID dest) + void setPtr(Condition cond, RegisterID left, Imm32 right, RegisterID dest) { - m_assembler.movzwl_mr(address.offset, address.base, address.index, address.scale, dest); + set32(cond, left, right, dest); } void storePtr(RegisterID src, ImplicitAddress address) { -#if PLATFORM(X86_64) - m_assembler.movq_rm(src, address.offset, address.base); -#else store32(src, address); -#endif } - DataLabel32 storePtrWithAddressOffsetPatch(RegisterID src, Address address) + void storePtr(RegisterID src, BaseIndex address) { -#if PLATFORM(X86_64) - m_assembler.movq_rm_disp32(src, address.offset, address.base); - return DataLabel32(this); -#else - m_assembler.movl_rm_disp32(src, address.offset, address.base); - return DataLabel32(this); -#endif + store32(src, address); } - void storePtr(RegisterID src, BaseIndex address) + void storePtr(RegisterID src, void* address) { -#if PLATFORM(X86_64) - m_assembler.movq_rm(src, address.offset, address.base, address.index, address.scale); -#else store32(src, address); -#endif } void storePtr(ImmPtr imm, ImplicitAddress address) { -#if PLATFORM(X86_64) - move(imm, scratchRegister); - storePtr(scratchRegister, address); -#else - m_assembler.movl_i32m(imm.asIntptr(), address.offset, address.base); -#endif + store32(Imm32(imm), address); } -#if !PLATFORM(X86_64) void storePtr(ImmPtr imm, void* address) { store32(Imm32(imm), address); } -#endif - - DataLabelPtr storePtrWithPatch(Address address) - { -#if PLATFORM(X86_64) - m_assembler.movq_i64r(0, scratchRegister); - DataLabelPtr label(this); - storePtr(scratchRegister, address); - return label; -#else - m_assembler.movl_i32m(0, address.offset, address.base); - return DataLabelPtr(this); -#endif - } - void store32(RegisterID src, ImplicitAddress address) + DataLabel32 storePtrWithAddressOffsetPatch(RegisterID src, Address address) { - m_assembler.movl_rm(src, address.offset, address.base); + return store32WithAddressOffsetPatch(src, address); } - void store32(RegisterID src, BaseIndex address) - { - m_assembler.movl_rm(src, address.offset, address.base, address.index, address.scale); - } - void store32(Imm32 imm, ImplicitAddress address) + Jump branchPtr(Condition cond, RegisterID left, RegisterID right) { - m_assembler.movl_i32m(imm.m_value, address.offset, address.base); - } - - void store32(Imm32 imm, void* address) - { -#if PLATFORM(X86_64) - move(X86::eax, scratchRegister); - move(imm, X86::eax); - m_assembler.movl_EAXm(address); - move(scratchRegister, X86::eax); -#else - m_assembler.movl_i32m(imm.m_value, address); -#endif + return branch32(cond, left, right); } - - // 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) + Jump branchPtr(Condition cond, RegisterID left, ImmPtr right) { - m_assembler.pop_r(dest); + return branch32(cond, left, Imm32(right)); } - void push(RegisterID src) + Jump branchPtr(Condition cond, RegisterID left, Address right) { - m_assembler.push_r(src); + return branch32(cond, left, right); } - void push(Address address) + Jump branchPtr(Condition cond, Address left, RegisterID right) { - m_assembler.push_m(address.offset, address.base); + return branch32(cond, left, right); } - void push(Imm32 imm) + Jump branchPtr(Condition cond, AbsoluteAddress left, RegisterID right) { - m_assembler.push_i32(imm.m_value); + return branch32(cond, left, right); } - void pop() - { - addPtr(Imm32(sizeof(void*)), X86::esp); - } - - void peek(RegisterID dest, int index = 0) + Jump branchPtr(Condition cond, Address left, ImmPtr right) { - loadPtr(Address(X86::esp, (index * sizeof(void *))), dest); + return branch32(cond, left, Imm32(right)); } - void poke(RegisterID src, int index = 0) + Jump branchPtr(Condition cond, AbsoluteAddress left, ImmPtr right) { - storePtr(src, Address(X86::esp, (index * sizeof(void *)))); + return branch32(cond, left, Imm32(right)); } - void poke(Imm32 value, int index = 0) + Jump branchTestPtr(Condition cond, RegisterID reg, RegisterID mask) { - store32(value, Address(X86::esp, (index * sizeof(void *)))); + return branchTest32(cond, reg, mask); } - void poke(ImmPtr imm, int index = 0) + Jump branchTestPtr(Condition cond, RegisterID reg, Imm32 mask = Imm32(-1)) { - storePtr(imm, Address(X86::esp, (index * sizeof(void *)))); + return branchTest32(cond, reg, mask); } - // Register move operations: - // - // Move values in registers. - - void move(Imm32 imm, RegisterID dest) + Jump branchTestPtr(Condition cond, Address address, Imm32 mask = Imm32(-1)) { - // Note: on 64-bit the Imm32 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); + return branchTest32(cond, address, mask); } - void move(RegisterID src, RegisterID dest) + Jump branchTestPtr(Condition cond, BaseIndex address, Imm32 mask = Imm32(-1)) { - // 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 PLATFORM(X86_64) - m_assembler.movq_rr(src, dest); -#else - m_assembler.movl_rr(src, dest); -#endif + return branchTest32(cond, address, mask); } - void move(ImmPtr imm, RegisterID dest) - { -#if PLATFORM(X86_64) - if (CAN_SIGN_EXTEND_U32_64(imm.asIntptr())) - m_assembler.movl_i32r(static_cast(imm.asIntptr()), dest); - else - m_assembler.movq_i64r(imm.asIntptr(), dest); -#else - m_assembler.movl_i32r(imm.asIntptr(), dest); -#endif - } - void swap(RegisterID reg1, RegisterID reg2) + Jump branchAddPtr(Condition cond, RegisterID src, RegisterID dest) { -#if PLATFORM(X86_64) - m_assembler.xchgq_rr(reg1, reg2); -#else - m_assembler.xchgl_rr(reg1, reg2); -#endif + return branchAdd32(cond, src, dest); } - void signExtend32ToPtr(RegisterID src, RegisterID dest) + Jump branchSubPtr(Condition cond, Imm32 imm, RegisterID dest) { -#if PLATFORM(X86_64) - m_assembler.movsxd_rr(src, dest); -#else - if (src != dest) - move(src, dest); -#endif + return branchSub32(cond, imm, dest); } - - void zeroExtend32ToPtr(RegisterID src, RegisterID dest) - { -#if PLATFORM(X86_64) - m_assembler.movl_rr(src, dest); -#else - if (src != 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, Imm32(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. - -private: - void compareImm32ForBranch(RegisterID left, int32_t right) - { - m_assembler.cmpl_ir(right, left); - } - - void compareImm32ForBranchEquality(RegisterID reg, int32_t imm) - { - if (!imm) - m_assembler.testl_rr(reg, reg); - else - m_assembler.cmpl_ir(imm, reg); - } - - void compareImm32ForBranchEquality(Address address, int32_t imm) - { - m_assembler.cmpl_im(imm, address.offset, address.base); - } - - void testImm32(RegisterID reg, Imm32 mask) - { - // 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 if ((mask.m_value & ~0x7f) == 0) - m_assembler.testb_i8r(mask.m_value, reg); - else - m_assembler.testl_i32r(mask.m_value, reg); - } - - void testImm32(Address address, Imm32 mask) - { - 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); - } - void testImm32(BaseIndex address, Imm32 mask) - { - 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); - } - -#if PLATFORM(X86_64) - void compareImm64ForBranch(RegisterID left, int32_t right) - { - m_assembler.cmpq_ir(right, left); - } - - void compareImm64ForBranchEquality(RegisterID reg, int32_t imm) - { - if (!imm) - m_assembler.testq_rr(reg, reg); - else - m_assembler.cmpq_ir(imm, reg); - } - - void testImm64(RegisterID reg, Imm32 mask) - { - // if we are only interested in the low seven bits, this can be tested with a testb - if (mask.m_value == -1) - m_assembler.testq_rr(reg, reg); - else if ((mask.m_value & ~0x7f) == 0) - m_assembler.testb_i8r(mask.m_value, reg); - else - m_assembler.testq_i32r(mask.m_value, reg); - } - - void testImm64(Address address, Imm32 mask) - { - if (mask.m_value == -1) - m_assembler.cmpq_im(0, address.offset, address.base); - else - m_assembler.testq_i32m(mask.m_value, address.offset, address.base); - } - - void testImm64(BaseIndex address, Imm32 mask) - { - if (mask.m_value == -1) - m_assembler.cmpq_im(0, address.offset, address.base, address.index, address.scale); - else - m_assembler.testq_i32m(mask.m_value, address.offset, address.base, address.index, address.scale); - } -#endif - -public: - Jump ja32(RegisterID left, Imm32 right) - { - compareImm32ForBranch(left, right.m_value); - return Jump(m_assembler.ja()); - } - - Jump jaePtr(RegisterID left, RegisterID right) - { -#if PLATFORM(X86_64) - m_assembler.cmpq_rr(right, left); - return Jump(m_assembler.jae()); -#else - return jae32(left, right); -#endif - } - - Jump jaePtr(RegisterID reg, ImmPtr ptr) - { -#if PLATFORM(X86_64) - intptr_t imm = ptr.asIntptr(); - if (CAN_SIGN_EXTEND_32_64(imm)) { - compareImm64ForBranch(reg, imm); - return Jump(m_assembler.jae()); - } else { - move(ptr, scratchRegister); - return jaePtr(reg, scratchRegister); - } -#else - return jae32(reg, Imm32(ptr)); -#endif - } - - Jump jae32(RegisterID left, RegisterID right) - { - m_assembler.cmpl_rr(right, left); - return Jump(m_assembler.jae()); - } - - Jump jae32(RegisterID left, Imm32 right) - { - compareImm32ForBranch(left, right.m_value); - return Jump(m_assembler.jae()); - } - - Jump jae32(RegisterID left, Address right) - { - m_assembler.cmpl_mr(right.offset, right.base, left); - return Jump(m_assembler.jae()); - } - - Jump jae32(Address left, RegisterID right) - { - m_assembler.cmpl_rm(right, left.offset, left.base); - return Jump(m_assembler.jae()); - } - - Jump jbPtr(RegisterID left, RegisterID right) - { -#if PLATFORM(X86_64) - m_assembler.cmpq_rr(right, left); - return Jump(m_assembler.jb()); -#else - return jb32(left, right); -#endif - } - - Jump jbPtr(RegisterID reg, ImmPtr ptr) - { -#if PLATFORM(X86_64) - intptr_t imm = ptr.asIntptr(); - if (CAN_SIGN_EXTEND_32_64(imm)) { - compareImm64ForBranch(reg, imm); - return Jump(m_assembler.jb()); - } else { - move(ptr, scratchRegister); - return jbPtr(reg, scratchRegister); - } -#else - return jb32(reg, Imm32(ptr)); -#endif - } - - Jump jb32(RegisterID left, RegisterID right) - { - m_assembler.cmpl_rr(right, left); - return Jump(m_assembler.jb()); - } - - Jump jb32(RegisterID left, Imm32 right) - { - compareImm32ForBranch(left, right.m_value); - return Jump(m_assembler.jb()); - } - - Jump jb32(RegisterID left, Address right) - { - m_assembler.cmpl_mr(right.offset, right.base, left); - return Jump(m_assembler.jb()); - } - - Jump jePtr(RegisterID op1, RegisterID op2) - { -#if PLATFORM(X86_64) - m_assembler.cmpq_rr(op1, op2); - return Jump(m_assembler.je()); -#else - return je32(op1, op2); -#endif - } - - Jump jePtr(RegisterID reg, Address address) - { -#if PLATFORM(X86_64) - m_assembler.cmpq_rm(reg, address.offset, address.base); -#else - m_assembler.cmpl_rm(reg, address.offset, address.base); -#endif - return Jump(m_assembler.je()); - } - - Jump jePtr(RegisterID reg, ImmPtr ptr) - { -#if PLATFORM(X86_64) - intptr_t imm = ptr.asIntptr(); - if (CAN_SIGN_EXTEND_32_64(imm)) { - compareImm64ForBranchEquality(reg, imm); - return Jump(m_assembler.je()); - } else { - move(ptr, scratchRegister); - return jePtr(scratchRegister, reg); - } -#else - return je32(reg, Imm32(ptr)); -#endif - } - - Jump jePtr(Address address, ImmPtr imm) - { -#if PLATFORM(X86_64) - move(imm, scratchRegister); - return jePtr(scratchRegister, address); -#else - return je32(address, Imm32(imm)); -#endif - } - - Jump je32(RegisterID op1, RegisterID op2) - { - m_assembler.cmpl_rr(op1, op2); - return Jump(m_assembler.je()); - } - - Jump je32(Address op1, RegisterID op2) - { - m_assembler.cmpl_mr(op1.offset, op1.base, op2); - return Jump(m_assembler.je()); - } - - Jump je32(RegisterID reg, Imm32 imm) - { - compareImm32ForBranchEquality(reg, imm.m_value); - return Jump(m_assembler.je()); - } - - Jump je32(Address address, Imm32 imm) - { - compareImm32ForBranchEquality(address, imm.m_value); - return Jump(m_assembler.je()); - } - - Jump je16(RegisterID op1, BaseIndex op2) - { - m_assembler.cmpw_rm(op1, op2.offset, op2.base, op2.index, op2.scale); - return Jump(m_assembler.je()); - } - - Jump jg32(RegisterID left, RegisterID right) - { - m_assembler.cmpl_rr(right, left); - return Jump(m_assembler.jg()); - } - - Jump jg32(RegisterID reg, Address address) - { - m_assembler.cmpl_mr(address.offset, address.base, reg); - return Jump(m_assembler.jg()); - } - - Jump jgePtr(RegisterID left, RegisterID right) - { -#if PLATFORM(X86_64) - m_assembler.cmpq_rr(right, left); - return Jump(m_assembler.jge()); -#else - return jge32(left, right); -#endif - } - - Jump jgePtr(RegisterID reg, ImmPtr ptr) - { -#if PLATFORM(X86_64) - intptr_t imm = ptr.asIntptr(); - if (CAN_SIGN_EXTEND_32_64(imm)) { - compareImm64ForBranch(reg, imm); - return Jump(m_assembler.jge()); - } else { - move(ptr, scratchRegister); - return jgePtr(reg, scratchRegister); - } -#else - return jge32(reg, Imm32(ptr)); -#endif - } - - Jump jge32(RegisterID left, RegisterID right) - { - m_assembler.cmpl_rr(right, left); - return Jump(m_assembler.jge()); - } - - Jump jge32(RegisterID left, Imm32 right) - { - compareImm32ForBranch(left, right.m_value); - return Jump(m_assembler.jge()); - } - - Jump jlPtr(RegisterID left, RegisterID right) - { -#if PLATFORM(X86_64) - m_assembler.cmpq_rr(right, left); - return Jump(m_assembler.jl()); -#else - return jl32(left, right); -#endif - } - - Jump jlPtr(RegisterID reg, ImmPtr ptr) - { -#if PLATFORM(X86_64) - intptr_t imm = ptr.asIntptr(); - if (CAN_SIGN_EXTEND_32_64(imm)) { - compareImm64ForBranch(reg, imm); - return Jump(m_assembler.jl()); - } else { - move(ptr, scratchRegister); - return jlPtr(reg, scratchRegister); - } -#else - return jl32(reg, Imm32(ptr)); -#endif - } - - Jump jl32(RegisterID left, RegisterID right) - { - m_assembler.cmpl_rr(right, left); - return Jump(m_assembler.jl()); - } - - Jump jl32(RegisterID left, Imm32 right) - { - compareImm32ForBranch(left, right.m_value); - return Jump(m_assembler.jl()); - } - - Jump jlePtr(RegisterID left, RegisterID right) - { -#if PLATFORM(X86_64) - m_assembler.cmpq_rr(right, left); - return Jump(m_assembler.jle()); -#else - return jle32(left, right); -#endif - } - - Jump jlePtr(RegisterID reg, ImmPtr ptr) - { -#if PLATFORM(X86_64) - intptr_t imm = ptr.asIntptr(); - if (CAN_SIGN_EXTEND_32_64(imm)) { - compareImm64ForBranch(reg, imm); - return Jump(m_assembler.jle()); - } else { - move(ptr, scratchRegister); - return jlePtr(reg, scratchRegister); - } -#else - return jle32(reg, Imm32(ptr)); -#endif - } - - Jump jle32(RegisterID left, RegisterID right) - { - m_assembler.cmpl_rr(right, left); - return Jump(m_assembler.jle()); - } - - Jump jle32(RegisterID left, Imm32 right) - { - compareImm32ForBranch(left, right.m_value); - return Jump(m_assembler.jle()); - } - - Jump jnePtr(RegisterID op1, RegisterID op2) - { -#if PLATFORM(X86_64) - m_assembler.cmpq_rr(op1, op2); - return Jump(m_assembler.jne()); -#else - return jne32(op1, op2); -#endif - } - - Jump jnePtr(RegisterID reg, Address address) - { -#if PLATFORM(X86_64) - m_assembler.cmpq_rm(reg, address.offset, address.base); -#else - m_assembler.cmpl_rm(reg, address.offset, address.base); -#endif - return Jump(m_assembler.jne()); - } - - Jump jnePtr(RegisterID reg, AbsoluteAddress address) - { -#if PLATFORM(X86_64) - move(ImmPtr(address.m_ptr), scratchRegister); - return jnePtr(reg, Address(scratchRegister)); -#else - m_assembler.cmpl_rm(reg, address.m_ptr); - return Jump(m_assembler.jne()); -#endif - } - - Jump jnePtr(RegisterID reg, ImmPtr ptr) - { -#if PLATFORM(X86_64) - intptr_t imm = ptr.asIntptr(); - if (CAN_SIGN_EXTEND_32_64(imm)) { - compareImm64ForBranchEquality(reg, imm); - return Jump(m_assembler.jne()); - } else { - move(ptr, scratchRegister); - return jnePtr(scratchRegister, reg); - } -#else - return jne32(reg, Imm32(ptr)); -#endif - } - - Jump jnePtr(Address address, ImmPtr imm) - { -#if PLATFORM(X86_64) - move(imm, scratchRegister); - return jnePtr(scratchRegister, address); -#else - return jne32(address, Imm32(imm)); -#endif - } - -#if !PLATFORM(X86_64) - Jump jnePtr(AbsoluteAddress address, ImmPtr imm) - { - m_assembler.cmpl_im(imm.asIntptr(), address.m_ptr); - return Jump(m_assembler.jne()); - } -#endif - - Jump jnePtrWithPatch(RegisterID reg, DataLabelPtr& dataLabel, ImmPtr initialValue = ImmPtr(0)) - { -#if PLATFORM(X86_64) - m_assembler.movq_i64r(initialValue.asIntptr(), scratchRegister); - dataLabel = DataLabelPtr(this); - return jnePtr(scratchRegister, reg); -#else - m_assembler.cmpl_ir_force32(initialValue.asIntptr(), reg); - dataLabel = DataLabelPtr(this); - return Jump(m_assembler.jne()); -#endif - } - - Jump jnePtrWithPatch(Address address, DataLabelPtr& dataLabel, ImmPtr initialValue = ImmPtr(0)) - { -#if PLATFORM(X86_64) - m_assembler.movq_i64r(initialValue.asIntptr(), scratchRegister); - dataLabel = DataLabelPtr(this); - return jnePtr(scratchRegister, address); -#else - m_assembler.cmpl_im_force32(initialValue.asIntptr(), address.offset, address.base); - dataLabel = DataLabelPtr(this); - return Jump(m_assembler.jne()); -#endif - } - - Jump jne32(RegisterID op1, RegisterID op2) - { - m_assembler.cmpl_rr(op1, op2); - return Jump(m_assembler.jne()); - } - - Jump jne32(RegisterID reg, Imm32 imm) - { - compareImm32ForBranchEquality(reg, imm.m_value); - return Jump(m_assembler.jne()); - } - - Jump jne32(Address address, Imm32 imm) - { - compareImm32ForBranchEquality(address, imm.m_value); - return Jump(m_assembler.jne()); - } - - Jump jne32(Address address, RegisterID reg) - { - m_assembler.cmpl_rm(reg, address.offset, address.base); - return Jump(m_assembler.jne()); - } - - Jump jnzPtr(RegisterID reg, RegisterID mask) - { -#if PLATFORM(X86_64) - m_assembler.testq_rr(reg, mask); - return Jump(m_assembler.jne()); -#else - return jnz32(reg, mask); -#endif - } - - Jump jnzPtr(RegisterID reg, Imm32 mask = Imm32(-1)) - { -#if PLATFORM(X86_64) - testImm64(reg, mask); - return Jump(m_assembler.jne()); -#else - return jnz32(reg, mask); -#endif - } - - Jump jnzPtr(RegisterID reg, ImmPtr mask) - { -#if PLATFORM(X86_64) - move(mask, scratchRegister); - m_assembler.testq_rr(scratchRegister, reg); - return Jump(m_assembler.jne()); -#else - return jnz32(reg, Imm32(mask)); -#endif - } - - Jump jnzPtr(Address address, Imm32 mask = Imm32(-1)) - { -#if PLATFORM(X86_64) - testImm64(address, mask); - return Jump(m_assembler.jne()); -#else - return jnz32(address, mask); -#endif - } - - Jump jnz32(RegisterID reg, RegisterID mask) - { - m_assembler.testl_rr(reg, mask); - return Jump(m_assembler.jne()); - } - - Jump jnz32(RegisterID reg, Imm32 mask = Imm32(-1)) - { - testImm32(reg, mask); - return Jump(m_assembler.jne()); - } - - Jump jnz32(Address address, Imm32 mask = Imm32(-1)) - { - testImm32(address, mask); - return Jump(m_assembler.jne()); - } - - Jump jzPtr(RegisterID reg, RegisterID mask) - { -#if PLATFORM(X86_64) - m_assembler.testq_rr(reg, mask); - return Jump(m_assembler.je()); -#else - return jz32(reg, mask); -#endif - } - - Jump jzPtr(RegisterID reg, Imm32 mask = Imm32(-1)) - { -#if PLATFORM(X86_64) - testImm64(reg, mask); - return Jump(m_assembler.je()); -#else - return jz32(reg, mask); -#endif - } - - Jump jzPtr(RegisterID reg, ImmPtr mask) - { -#if PLATFORM(X86_64) - move(mask, scratchRegister); - m_assembler.testq_rr(scratchRegister, reg); - return Jump(m_assembler.je()); -#else - return jz32(reg, Imm32(mask)); -#endif - } - - Jump jzPtr(Address address, Imm32 mask = Imm32(-1)) - { -#if PLATFORM(X86_64) - testImm64(address, mask); - return Jump(m_assembler.je()); -#else - return jz32(address, mask); -#endif - } - - Jump jzPtr(BaseIndex address, Imm32 mask = Imm32(-1)) - { -#if PLATFORM(X86_64) - testImm64(address, mask); - return Jump(m_assembler.je()); -#else - return jz32(address, mask); -#endif - } - - Jump jz32(RegisterID reg, RegisterID mask) - { - m_assembler.testl_rr(reg, mask); - return Jump(m_assembler.je()); - } - - Jump jz32(RegisterID reg, Imm32 mask = Imm32(-1)) - { - testImm32(reg, mask); - return Jump(m_assembler.je()); - } - - Jump jz32(Address address, Imm32 mask = Imm32(-1)) - { - testImm32(address, mask); - return Jump(m_assembler.je()); - } - - Jump jz32(BaseIndex address, Imm32 mask = Imm32(-1)) - { - testImm32(address, mask); - return Jump(m_assembler.je()); - } - - Jump jump() - { - return Jump(m_assembler.jmp()); - } - - - // Backwards, local control flow operations: - // - // These operations provide a shorter notation for local - // backwards branches, which may be both more convenient - // for the user, and for the programmer, and for the - // assembler (allowing shorter values to be used in - // relative offsets). - // - // The code sequence: - // - // Label topOfLoop(this); - // // ... - // jne32(reg1, reg2, topOfLoop); - // - // Is equivalent to the longer, potentially less efficient form: - // - // Label topOfLoop(this); - // // ... - // jne32(reg1, reg2).linkTo(topOfLoop); - - void jae32(RegisterID left, Address right, Label target) - { - jae32(left, right).linkTo(target, this); - } - - void je32(RegisterID op1, Imm32 imm, Label target) - { - je32(op1, imm).linkTo(target, this); - } - - void je16(RegisterID op1, BaseIndex op2, Label target) - { - je16(op1, op2).linkTo(target, this); - } - - void jl32(RegisterID left, Imm32 right, Label target) - { - jl32(left, right).linkTo(target, this); - } - - void jle32(RegisterID left, RegisterID right, Label target) - { - jle32(left, right).linkTo(target, this); - } - - void jnePtr(RegisterID op1, ImmPtr imm, Label target) - { - jnePtr(op1, imm).linkTo(target, this); - } - - void jne32(RegisterID op1, RegisterID op2, Label target) - { - jne32(op1, op2).linkTo(target, this); - } - - void jne32(RegisterID op1, Imm32 imm, Label target) - { - jne32(op1, imm).linkTo(target, this); - } - - void jzPtr(RegisterID reg, Label target) - { - jzPtr(reg).linkTo(target, this); - } - - void jump(Label target) - { - m_assembler.link(m_assembler.jmp(), target.m_label); - } - - 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 jnzSubPtr(Imm32 imm, RegisterID dest) - { - subPtr(imm, dest); - return Jump(m_assembler.jne()); - } - - Jump jnzSub32(Imm32 imm, RegisterID dest) - { - sub32(imm, dest); - return Jump(m_assembler.jne()); - } - - Jump joAddPtr(RegisterID src, RegisterID dest) - { - addPtr(src, dest); - return Jump(m_assembler.jo()); - } - - Jump joAdd32(RegisterID src, RegisterID dest) - { - add32(src, dest); - return Jump(m_assembler.jo()); - } - - Jump joAdd32(Imm32 imm, RegisterID dest) - { - add32(imm, dest); - return Jump(m_assembler.jo()); - } - - Jump joMul32(RegisterID src, RegisterID dest) - { - mul32(src, dest); - return Jump(m_assembler.jo()); - } - - Jump joMul32(Imm32 imm, RegisterID src, RegisterID dest) - { - mul32(imm, src, dest); - return Jump(m_assembler.jo()); - } - - Jump joSub32(RegisterID src, RegisterID dest) - { - sub32(src, dest); - return Jump(m_assembler.jo()); - } - - Jump joSub32(Imm32 imm, RegisterID dest) - { - sub32(imm, dest); - return Jump(m_assembler.jo()); - } - - Jump jzSubPtr(Imm32 imm, RegisterID dest) - { - subPtr(imm, dest); - return Jump(m_assembler.je()); - } - - Jump jzSub32(Imm32 imm, RegisterID dest) - { - sub32(imm, dest); - return Jump(m_assembler.je()); - } - - - // Miscellaneous operations: - - void breakpoint() - { - m_assembler.int3(); - } - - Jump call() - { - return Jump(m_assembler.call()); - } - - // FIXME: why does this return a Jump object? - it can't be linked. - // This may be to get a reference to the return address of the call. - // - // This should probably be handled by a separate label type to a regular - // jump. Todo: add a CallLabel type, for the regular call - can be linked - // like a jump (possibly a subclass of jump?, or possibly casts to a Jump). - // Also add a CallReturnLabel type for this to return (just a more JmpDsty - // form of label, can get the void* after the code has been linked, but can't - // try to link it like a Jump object), and let the CallLabel be cast into a - // CallReturnLabel. - Jump call(RegisterID target) - { - return Jump(m_assembler.call(target)); - } - - Label label() - { - return Label(this); - } - - Label align() - { - m_assembler.align(16); - return Label(this); - } - - ptrdiff_t differenceBetween(Label from, Jump to) - { - return X86Assembler::getDifferenceBetweenLabels(from.m_label, to.m_jmp); - } - - ptrdiff_t differenceBetween(Label from, Label to) - { - return X86Assembler::getDifferenceBetweenLabels(from.m_label, to.m_label); - } - - ptrdiff_t differenceBetween(Label from, DataLabelPtr to) - { - return X86Assembler::getDifferenceBetweenLabels(from.m_label, to.m_label); - } - - ptrdiff_t differenceBetween(Label from, DataLabel32 to) - { - return X86Assembler::getDifferenceBetweenLabels(from.m_label, to.m_label); - } - - ptrdiff_t differenceBetween(DataLabelPtr from, Jump to) - { - return X86Assembler::getDifferenceBetweenLabels(from.m_label, to.m_jmp); - } - - void ret() - { - m_assembler.ret(); - } - - void sete32(RegisterID src, RegisterID srcDest) - { - m_assembler.cmpl_rr(srcDest, src); - m_assembler.sete_r(srcDest); - m_assembler.movzbl_rr(srcDest, srcDest); - } - - void sete32(Imm32 imm, RegisterID srcDest) - { - compareImm32ForBranchEquality(srcDest, imm.m_value); - m_assembler.sete_r(srcDest); - m_assembler.movzbl_rr(srcDest, srcDest); - } - - void setne32(RegisterID src, RegisterID srcDest) - { - m_assembler.cmpl_rr(srcDest, src); - m_assembler.setne_r(srcDest); - m_assembler.movzbl_rr(srcDest, srcDest); - } - - void setne32(Imm32 imm, RegisterID srcDest) - { - compareImm32ForBranchEquality(srcDest, imm.m_value); - m_assembler.setne_r(srcDest); - m_assembler.movzbl_rr(srcDest, srcDest); - } - - // FIXME: - // The mask should be optional... paerhaps 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 setnz32(Address address, Imm32 mask, RegisterID dest) - { - testImm32(address, mask); - m_assembler.setnz_r(dest); - m_assembler.movzbl_rr(dest, dest); - } - - void setz32(Address address, Imm32 mask, RegisterID dest) - { - testImm32(address, mask); - m_assembler.setz_r(dest); - m_assembler.movzbl_rr(dest, dest); - } }; } // namespace JSC