// Copyright 2012 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef INCLUDED_FROM_MACRO_ASSEMBLER_H #error This header must be included via macro-assembler.h #endif #ifndef V8_CODEGEN_X64_MACRO_ASSEMBLER_X64_H_ #define V8_CODEGEN_X64_MACRO_ASSEMBLER_X64_H_ #include "src/base/flags.h" #include "src/codegen/bailout-reason.h" #include "src/codegen/x64/assembler-x64.h" #include "src/common/globals.h" #include "src/objects/contexts.h" namespace v8 { namespace internal { // Convenience for platform-independent signatures. using MemOperand = Operand; class StringConstantBase; enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET }; enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK }; struct SmiIndex { SmiIndex(Register index_register, ScaleFactor scale) : reg(index_register), scale(scale) {} Register reg; ScaleFactor scale; }; // Convenient class to access arguments below the stack pointer. class StackArgumentsAccessor { public: // argc = the number of arguments not including the receiver. explicit StackArgumentsAccessor(Register argc) : argc_(argc) { DCHECK_NE(argc_, no_reg); } // Argument 0 is the receiver (despite argc not including the receiver). Operand operator[](int index) const { return GetArgumentOperand(index); } Operand GetArgumentOperand(int index) const; Operand GetReceiverOperand() const { return GetArgumentOperand(0); } private: const Register argc_; DISALLOW_IMPLICIT_CONSTRUCTORS(StackArgumentsAccessor); }; class V8_EXPORT_PRIVATE TurboAssembler : public TurboAssemblerBase { public: using TurboAssemblerBase::TurboAssemblerBase; template <typename Dst, typename... Args> struct AvxHelper { Assembler* assm; base::Optional<CpuFeature> feature = base::nullopt; // Call a method where the AVX version expects the dst argument to be // duplicated. template <void (Assembler::*avx)(Dst, Dst, Args...), void (Assembler::*no_avx)(Dst, Args...)> void emit(Dst dst, Args... args) { if (CpuFeatures::IsSupported(AVX)) { CpuFeatureScope scope(assm, AVX); (assm->*avx)(dst, dst, args...); } else if (feature.has_value()) { DCHECK(CpuFeatures::IsSupported(*feature)); CpuFeatureScope scope(assm, *feature); (assm->*no_avx)(dst, args...); } else { (assm->*no_avx)(dst, args...); } } // Call a method where the AVX version expects no duplicated dst argument. template <void (Assembler::*avx)(Dst, Args...), void (Assembler::*no_avx)(Dst, Args...)> void emit(Dst dst, Args... args) { if (CpuFeatures::IsSupported(AVX)) { CpuFeatureScope scope(assm, AVX); (assm->*avx)(dst, args...); } else if (feature.has_value()) { DCHECK(CpuFeatures::IsSupported(*feature)); CpuFeatureScope scope(assm, *feature); (assm->*no_avx)(dst, args...); } else { (assm->*no_avx)(dst, args...); } } }; #define AVX_OP(macro_name, name) \ template <typename Dst, typename... Args> \ void macro_name(Dst dst, Args... args) { \ AvxHelper<Dst, Args...>{this} \ .template emit<&Assembler::v##name, &Assembler::name>(dst, args...); \ } #define AVX_OP_SSE3(macro_name, name) \ template <typename Dst, typename... Args> \ void macro_name(Dst dst, Args... args) { \ AvxHelper<Dst, Args...>{this, base::Optional<CpuFeature>(SSE3)} \ .template emit<&Assembler::v##name, &Assembler::name>(dst, args...); \ } #define AVX_OP_SSSE3(macro_name, name) \ template <typename Dst, typename... Args> \ void macro_name(Dst dst, Args... args) { \ AvxHelper<Dst, Args...>{this, base::Optional<CpuFeature>(SSSE3)} \ .template emit<&Assembler::v##name, &Assembler::name>(dst, args...); \ } #define AVX_OP_SSE4_1(macro_name, name) \ template <typename Dst, typename... Args> \ void macro_name(Dst dst, Args... args) { \ AvxHelper<Dst, Args...>{this, base::Optional<CpuFeature>(SSE4_1)} \ .template emit<&Assembler::v##name, &Assembler::name>(dst, args...); \ } #define AVX_OP_SSE4_2(macro_name, name) \ template <typename Dst, typename... Args> \ void macro_name(Dst dst, Args... args) { \ AvxHelper<Dst, Args...>{this, base::Optional<CpuFeature>(SSE4_2)} \ .template emit<&Assembler::v##name, &Assembler::name>(dst, args...); \ } AVX_OP(Subsd, subsd) AVX_OP(Divss, divss) AVX_OP(Divsd, divsd) AVX_OP(Orps, orps) AVX_OP(Xorps, xorps) AVX_OP(Xorpd, xorpd) AVX_OP(Movd, movd) AVX_OP(Movq, movq) AVX_OP(Movaps, movaps) AVX_OP(Movapd, movapd) AVX_OP(Movups, movups) AVX_OP(Movmskps, movmskps) AVX_OP(Movmskpd, movmskpd) AVX_OP(Pmovmskb, pmovmskb) AVX_OP(Movss, movss) AVX_OP(Movsd, movsd) AVX_OP(Movdqu, movdqu) AVX_OP(Movlps, movlps) AVX_OP(Movhps, movhps) AVX_OP(Pcmpeqb, pcmpeqb) AVX_OP(Pcmpeqw, pcmpeqw) AVX_OP(Pcmpeqd, pcmpeqd) AVX_OP(Pcmpgtb, pcmpgtb) AVX_OP(Pcmpgtw, pcmpgtw) AVX_OP(Pmaxsw, pmaxsw) AVX_OP(Pmaxub, pmaxub) AVX_OP(Pminsw, pminsw) AVX_OP(Pminub, pminub) AVX_OP(Addss, addss) AVX_OP(Addsd, addsd) AVX_OP(Mulsd, mulsd) AVX_OP(Andps, andps) AVX_OP(Andnps, andnps) AVX_OP(Andpd, andpd) AVX_OP(Andnpd, andnpd) AVX_OP(Orpd, orpd) AVX_OP(Cmpeqps, cmpeqps) AVX_OP(Cmpltps, cmpltps) AVX_OP(Cmpleps, cmpleps) AVX_OP(Cmpneqps, cmpneqps) AVX_OP(Cmpnltps, cmpnltps) AVX_OP(Cmpnleps, cmpnleps) AVX_OP(Cmpeqpd, cmpeqpd) AVX_OP(Cmpltpd, cmpltpd) AVX_OP(Cmplepd, cmplepd) AVX_OP(Cmpneqpd, cmpneqpd) AVX_OP(Cmpnltpd, cmpnltpd) AVX_OP(Cmpnlepd, cmpnlepd) AVX_OP(Sqrtss, sqrtss) AVX_OP(Sqrtsd, sqrtsd) AVX_OP(Sqrtps, sqrtps) AVX_OP(Sqrtpd, sqrtpd) AVX_OP(Cvttps2dq, cvttps2dq) AVX_OP(Ucomiss, ucomiss) AVX_OP(Ucomisd, ucomisd) AVX_OP(Pand, pand) AVX_OP(Por, por) AVX_OP(Pxor, pxor) AVX_OP(Psubb, psubb) AVX_OP(Psubw, psubw) AVX_OP(Psubd, psubd) AVX_OP(Psubq, psubq) AVX_OP(Psubsb, psubsb) AVX_OP(Psubsw, psubsw) AVX_OP(Psubusb, psubusb) AVX_OP(Psubusw, psubusw) AVX_OP(Pslld, pslld) AVX_OP(Pavgb, pavgb) AVX_OP(Pavgw, pavgw) AVX_OP(Psraw, psraw) AVX_OP(Psrad, psrad) AVX_OP(Psllw, psllw) AVX_OP(Psllq, psllq) AVX_OP(Psrlw, psrlw) AVX_OP(Psrld, psrld) AVX_OP(Psrlq, psrlq) AVX_OP(Pmaddwd, pmaddwd) AVX_OP(Paddb, paddb) AVX_OP(Paddw, paddw) AVX_OP(Paddd, paddd) AVX_OP(Paddq, paddq) AVX_OP(Paddsb, paddsb) AVX_OP(Paddsw, paddsw) AVX_OP(Paddusb, paddusb) AVX_OP(Paddusw, paddusw) AVX_OP(Pcmpgtd, pcmpgtd) AVX_OP(Pmullw, pmullw) AVX_OP(Pmuludq, pmuludq) AVX_OP(Addpd, addpd) AVX_OP(Subpd, subpd) AVX_OP(Mulpd, mulpd) AVX_OP(Minps, minps) AVX_OP(Minpd, minpd) AVX_OP(Divpd, divpd) AVX_OP(Maxps, maxps) AVX_OP(Maxpd, maxpd) AVX_OP(Shufps, shufps) AVX_OP(Cvtdq2ps, cvtdq2ps) AVX_OP(Rcpps, rcpps) AVX_OP(Rsqrtps, rsqrtps) AVX_OP(Addps, addps) AVX_OP(Subps, subps) AVX_OP(Mulps, mulps) AVX_OP(Divps, divps) AVX_OP(Pshuflw, pshuflw) AVX_OP(Pshufhw, pshufhw) AVX_OP(Packsswb, packsswb) AVX_OP(Packuswb, packuswb) AVX_OP(Packssdw, packssdw) AVX_OP(Punpcklbw, punpcklbw) AVX_OP(Punpcklwd, punpcklwd) AVX_OP(Punpckldq, punpckldq) AVX_OP(Punpckhbw, punpckhbw) AVX_OP(Punpckhwd, punpckhwd) AVX_OP(Punpckhdq, punpckhdq) AVX_OP(Punpcklqdq, punpcklqdq) AVX_OP(Punpckhqdq, punpckhqdq) AVX_OP(Pshufd, pshufd) AVX_OP(Cmpps, cmpps) AVX_OP(Cmppd, cmppd) AVX_OP(Movlhps, movlhps) AVX_OP_SSE3(Haddps, haddps) AVX_OP_SSE3(Movddup, movddup) AVX_OP_SSSE3(Phaddd, phaddd) AVX_OP_SSSE3(Phaddw, phaddw) AVX_OP_SSSE3(Pshufb, pshufb) AVX_OP_SSSE3(Psignb, psignb) AVX_OP_SSSE3(Psignw, psignw) AVX_OP_SSSE3(Psignd, psignd) AVX_OP_SSSE3(Palignr, palignr) AVX_OP_SSSE3(Pabsb, pabsb) AVX_OP_SSSE3(Pabsw, pabsw) AVX_OP_SSSE3(Pabsd, pabsd) AVX_OP_SSE4_1(Pcmpeqq, pcmpeqq) AVX_OP_SSE4_1(Packusdw, packusdw) AVX_OP_SSE4_1(Pminsb, pminsb) AVX_OP_SSE4_1(Pminsd, pminsd) AVX_OP_SSE4_1(Pminuw, pminuw) AVX_OP_SSE4_1(Pminud, pminud) AVX_OP_SSE4_1(Pmaxsb, pmaxsb) AVX_OP_SSE4_1(Pmaxsd, pmaxsd) AVX_OP_SSE4_1(Pmaxuw, pmaxuw) AVX_OP_SSE4_1(Pmaxud, pmaxud) AVX_OP_SSE4_1(Pmulld, pmulld) AVX_OP_SSE4_1(Extractps, extractps) AVX_OP_SSE4_1(Insertps, insertps) AVX_OP_SSE4_1(Pinsrq, pinsrq) AVX_OP_SSE4_1(Pblendw, pblendw) AVX_OP_SSE4_1(Ptest, ptest) AVX_OP_SSE4_1(Pmovsxbw, pmovsxbw) AVX_OP_SSE4_1(Pmovsxwd, pmovsxwd) AVX_OP_SSE4_1(Pmovsxdq, pmovsxdq) AVX_OP_SSE4_1(Pmovzxbw, pmovzxbw) AVX_OP_SSE4_1(Pmovzxwd, pmovzxwd) AVX_OP_SSE4_1(Pmovzxdq, pmovzxdq) AVX_OP_SSE4_1(Pextrb, pextrb) AVX_OP_SSE4_1(Pextrw, pextrw) AVX_OP_SSE4_1(Pextrq, pextrq) AVX_OP_SSE4_1(Roundps, roundps) AVX_OP_SSE4_1(Roundpd, roundpd) AVX_OP_SSE4_1(Roundss, roundss) AVX_OP_SSE4_1(Roundsd, roundsd) AVX_OP_SSE4_2(Pcmpgtq, pcmpgtq) #undef AVX_OP void PushReturnAddressFrom(Register src) { pushq(src); } void PopReturnAddressTo(Register dst) { popq(dst); } void Ret(); // Return and drop arguments from stack, where the number of arguments // may be bigger than 2^16 - 1. Requires a scratch register. void Ret(int bytes_dropped, Register scratch); // Load a register with a long value as efficiently as possible. void Set(Register dst, int64_t x); void Set(Operand dst, intptr_t x); // Operations on roots in the root-array. void LoadRoot(Register destination, RootIndex index) override; void LoadRoot(Operand destination, RootIndex index) { LoadRoot(kScratchRegister, index); movq(destination, kScratchRegister); } void Push(Register src); void Push(Operand src); void Push(Immediate value); void Push(Smi smi); void Push(Handle<HeapObject> source); enum class PushArrayOrder { kNormal, kReverse }; // `array` points to the first element (the lowest address). // `array` and `size` are not modified. void PushArray(Register array, Register size, Register scratch, PushArrayOrder order = PushArrayOrder::kNormal); // Before calling a C-function from generated code, align arguments on stack. // After aligning the frame, arguments must be stored in rsp[0], rsp[8], // etc., not pushed. The argument count assumes all arguments are word sized. // The number of slots reserved for arguments depends on platform. On Windows // stack slots are reserved for the arguments passed in registers. On other // platforms stack slots are only reserved for the arguments actually passed // on the stack. void PrepareCallCFunction(int num_arguments); // Calls a C function and cleans up the space for arguments allocated // by PrepareCallCFunction. The called function is not allowed to trigger a // garbage collection, since that might move the code and invalidate the // return address (unless this is somehow accounted for by the called // function). void CallCFunction(ExternalReference function, int num_arguments); void CallCFunction(Register function, int num_arguments); // Calculate the number of stack slots to reserve for arguments when calling a // C function. int ArgumentStackSlotsForCFunctionCall(int num_arguments); void CheckPageFlag(Register object, Register scratch, int mask, Condition cc, Label* condition_met, Label::Distance condition_met_distance = Label::kFar); void Cvtss2sd(XMMRegister dst, XMMRegister src); void Cvtss2sd(XMMRegister dst, Operand src); void Cvtsd2ss(XMMRegister dst, XMMRegister src); void Cvtsd2ss(XMMRegister dst, Operand src); void Cvttsd2si(Register dst, XMMRegister src); void Cvttsd2si(Register dst, Operand src); void Cvttsd2siq(Register dst, XMMRegister src); void Cvttsd2siq(Register dst, Operand src); void Cvttss2si(Register dst, XMMRegister src); void Cvttss2si(Register dst, Operand src); void Cvttss2siq(Register dst, XMMRegister src); void Cvttss2siq(Register dst, Operand src); void Cvtlui2ss(XMMRegister dst, Register src); void Cvtlui2ss(XMMRegister dst, Operand src); void Cvtlui2sd(XMMRegister dst, Register src); void Cvtlui2sd(XMMRegister dst, Operand src); void Cvtqui2ss(XMMRegister dst, Register src); void Cvtqui2ss(XMMRegister dst, Operand src); void Cvtqui2sd(XMMRegister dst, Register src); void Cvtqui2sd(XMMRegister dst, Operand src); void Cvttsd2uiq(Register dst, Operand src, Label* fail = nullptr); void Cvttsd2uiq(Register dst, XMMRegister src, Label* fail = nullptr); void Cvttss2uiq(Register dst, Operand src, Label* fail = nullptr); void Cvttss2uiq(Register dst, XMMRegister src, Label* fail = nullptr); // cvtsi2sd and cvtsi2ss instructions only write to the low 64/32-bit of dst // register, which hinders register renaming and makes dependence chains // longer. So we use xorpd to clear the dst register before cvtsi2sd for // non-AVX and a scratch XMM register as first src for AVX to solve this // issue. void Cvtqsi2ss(XMMRegister dst, Register src); void Cvtqsi2ss(XMMRegister dst, Operand src); void Cvtqsi2sd(XMMRegister dst, Register src); void Cvtqsi2sd(XMMRegister dst, Operand src); void Cvtlsi2ss(XMMRegister dst, Register src); void Cvtlsi2ss(XMMRegister dst, Operand src); void Cvtlsi2sd(XMMRegister dst, Register src); void Cvtlsi2sd(XMMRegister dst, Operand src); void Lzcntq(Register dst, Register src); void Lzcntq(Register dst, Operand src); void Lzcntl(Register dst, Register src); void Lzcntl(Register dst, Operand src); void Tzcntq(Register dst, Register src); void Tzcntq(Register dst, Operand src); void Tzcntl(Register dst, Register src); void Tzcntl(Register dst, Operand src); void Popcntl(Register dst, Register src); void Popcntl(Register dst, Operand src); void Popcntq(Register dst, Register src); void Popcntq(Register dst, Operand src); // Is the value a tagged smi. Condition CheckSmi(Register src); Condition CheckSmi(Operand src); // Jump to label if the value is a tagged smi. void JumpIfSmi(Register src, Label* on_smi, Label::Distance near_jump = Label::kFar); void JumpIfEqual(Register a, int32_t b, Label* dest) { cmpl(a, Immediate(b)); j(equal, dest); } void JumpIfLessThan(Register a, int32_t b, Label* dest) { cmpl(a, Immediate(b)); j(less, dest); } void LoadMap(Register destination, Register object); void Move(Register dst, Smi source); void Move(Operand dst, Smi source) { Register constant = GetSmiConstant(source); movq(dst, constant); } void Move(Register dst, ExternalReference ext); void Move(XMMRegister dst, uint32_t src); void Move(XMMRegister dst, uint64_t src); void Move(XMMRegister dst, float src) { Move(dst, bit_cast<uint32_t>(src)); } void Move(XMMRegister dst, double src) { Move(dst, bit_cast<uint64_t>(src)); } void Move(XMMRegister dst, uint64_t high, uint64_t low); // Move if the registers are not identical. void Move(Register target, Register source); void Move(Register dst, Handle<HeapObject> source, RelocInfo::Mode rmode = RelocInfo::FULL_EMBEDDED_OBJECT); void Move(Operand dst, Handle<HeapObject> source, RelocInfo::Mode rmode = RelocInfo::FULL_EMBEDDED_OBJECT); // Loads a pointer into a register with a relocation mode. void Move(Register dst, Address ptr, RelocInfo::Mode rmode) { // This method must not be used with heap object references. The stored // address is not GC safe. Use the handle version instead. DCHECK(rmode == RelocInfo::NONE || rmode > RelocInfo::LAST_GCED_ENUM); movq(dst, Immediate64(ptr, rmode)); } // Move src0 to dst0 and src1 to dst1, handling possible overlaps. void MovePair(Register dst0, Register src0, Register dst1, Register src1); void MoveStringConstant( Register result, const StringConstantBase* string, RelocInfo::Mode rmode = RelocInfo::FULL_EMBEDDED_OBJECT); // Convert smi to word-size sign-extended value. void SmiUntag(Register reg); // Requires dst != src void SmiUntag(Register dst, Register src); void SmiUntag(Register dst, Operand src); // Loads the address of the external reference into the destination // register. void LoadAddress(Register destination, ExternalReference source); void LoadFromConstantsTable(Register destination, int constant_index) override; void LoadRootRegisterOffset(Register destination, intptr_t offset) override; void LoadRootRelative(Register destination, int32_t offset) override; // Operand pointing to an external reference. // May emit code to set up the scratch register. The operand is // only guaranteed to be correct as long as the scratch register // isn't changed. // If the operand is used more than once, use a scratch register // that is guaranteed not to be clobbered. Operand ExternalReferenceAsOperand(ExternalReference reference, Register scratch = kScratchRegister); void Call(Register reg) { call(reg); } void Call(Operand op); void Call(Handle<Code> code_object, RelocInfo::Mode rmode); void Call(Address destination, RelocInfo::Mode rmode); void Call(ExternalReference ext); void Call(Label* target) { call(target); } Operand EntryFromBuiltinIndexAsOperand(Builtins::Name builtin_index); Operand EntryFromBuiltinIndexAsOperand(Register builtin_index); void CallBuiltinByIndex(Register builtin_index) override; void CallBuiltin(int builtin_index); void LoadCodeObjectEntry(Register destination, Register code_object) override; void CallCodeObject(Register code_object) override; void JumpCodeObject(Register code_object) override; void RetpolineCall(Register reg); void RetpolineCall(Address destination, RelocInfo::Mode rmode); void Jump(Address destination, RelocInfo::Mode rmode); void Jump(const ExternalReference& reference) override; void Jump(Operand op); void Jump(Handle<Code> code_object, RelocInfo::Mode rmode, Condition cc = always); void RetpolineJump(Register reg); void CallForDeoptimization(Builtins::Name target, int deopt_id, Label* exit, DeoptimizeKind kind, Label* jump_deoptimization_entry_label); void Trap() override; void DebugBreak() override; // Non-SSE2 instructions. void Pextrd(Register dst, XMMRegister src, uint8_t imm8); void Pinsrb(XMMRegister dst, XMMRegister src1, Register src2, uint8_t imm8); void Pinsrb(XMMRegister dst, XMMRegister src1, Operand src2, uint8_t imm8); void Pinsrw(XMMRegister dst, XMMRegister src1, Register src2, uint8_t imm8); void Pinsrw(XMMRegister dst, XMMRegister src1, Operand src2, uint8_t imm8); void Pinsrd(XMMRegister dst, XMMRegister src1, Register src2, uint8_t imm8); void Pinsrd(XMMRegister dst, XMMRegister src1, Operand src2, uint8_t imm8); void Pinsrd(XMMRegister dst, Register src2, uint8_t imm8); void Pinsrd(XMMRegister dst, Operand src2, uint8_t imm8); void Pinsrq(XMMRegister dst, XMMRegister src1, Register src2, uint8_t imm8); void Pinsrq(XMMRegister dst, XMMRegister src1, Operand src2, uint8_t imm8); void Psllq(XMMRegister dst, int imm8) { Psllq(dst, static_cast<byte>(imm8)); } void Psllq(XMMRegister dst, byte imm8); void Psrlq(XMMRegister dst, int imm8) { Psrlq(dst, static_cast<byte>(imm8)); } void Psrlq(XMMRegister dst, byte imm8); void Pslld(XMMRegister dst, byte imm8); void Psrld(XMMRegister dst, byte imm8); void CompareRoot(Register with, RootIndex index); void CompareRoot(Operand with, RootIndex index); // Generates function and stub prologue code. void StubPrologue(StackFrame::Type type); void Prologue(); // Calls Abort(msg) if the condition cc is not satisfied. // Use --debug_code to enable. void Assert(Condition cc, AbortReason reason); // Like Assert(), but without condition. // Use --debug_code to enable. void AssertUnreachable(AbortReason reason); // Abort execution if a 64 bit register containing a 32 bit payload does not // have zeros in the top 32 bits, enabled via --debug-code. void AssertZeroExtended(Register reg); // Like Assert(), but always enabled. void Check(Condition cc, AbortReason reason); // Print a message to stdout and abort execution. void Abort(AbortReason msg); // Check that the stack is aligned. void CheckStackAlignment(); // Activation support. void EnterFrame(StackFrame::Type type); void EnterFrame(StackFrame::Type type, bool load_constant_pool_pointer_reg) { // Out-of-line constant pool not implemented on x64. UNREACHABLE(); } void LeaveFrame(StackFrame::Type type); // Allocate stack space of given size (i.e. decrement {rsp} by the value // stored in the given register, or by a constant). If you need to perform a // stack check, do it before calling this function because this function may // write into the newly allocated space. It may also overwrite the given // register's value, in the version that takes a register. #ifdef V8_TARGET_OS_WIN void AllocateStackSpace(Register bytes_scratch); void AllocateStackSpace(int bytes); #else void AllocateStackSpace(Register bytes) { subq(rsp, bytes); } void AllocateStackSpace(int bytes) { subq(rsp, Immediate(bytes)); } #endif // Removes current frame and its arguments from the stack preserving the // arguments and a return address pushed to the stack for the next call. Both // |callee_args_count| and |caller_args_count| do not include receiver. // |callee_args_count| is not modified. |caller_args_count| is trashed. void PrepareForTailCall(Register callee_args_count, Register caller_args_count, Register scratch0, Register scratch1); void InitializeRootRegister() { ExternalReference isolate_root = ExternalReference::isolate_root(isolate()); Move(kRootRegister, isolate_root); } void SaveRegisters(RegList registers); void RestoreRegisters(RegList registers); void CallRecordWriteStub(Register object, Register address, RememberedSetAction remembered_set_action, SaveFPRegsMode fp_mode); void CallRecordWriteStub(Register object, Register address, RememberedSetAction remembered_set_action, SaveFPRegsMode fp_mode, Address wasm_target); void CallEphemeronKeyBarrier(Register object, Register address, SaveFPRegsMode fp_mode); void MoveNumber(Register dst, double value); void MoveNonSmi(Register dst, double value); // Calculate how much stack space (in bytes) are required to store caller // registers excluding those specified in the arguments. int RequiredStackSizeForCallerSaved(SaveFPRegsMode fp_mode, Register exclusion1 = no_reg, Register exclusion2 = no_reg, Register exclusion3 = no_reg) const; // PushCallerSaved and PopCallerSaved do not arrange the registers in any // particular order so they are not useful for calls that can cause a GC. // The caller can exclude up to 3 registers that do not need to be saved and // restored. // Push caller saved registers on the stack, and return the number of bytes // stack pointer is adjusted. int PushCallerSaved(SaveFPRegsMode fp_mode, Register exclusion1 = no_reg, Register exclusion2 = no_reg, Register exclusion3 = no_reg); // Restore caller saved registers from the stack, and return the number of // bytes stack pointer is adjusted. int PopCallerSaved(SaveFPRegsMode fp_mode, Register exclusion1 = no_reg, Register exclusion2 = no_reg, Register exclusion3 = no_reg); // Compute the start of the generated instruction stream from the current PC. // This is an alternative to embedding the {CodeObject} handle as a reference. void ComputeCodeStartAddress(Register dst); void ResetSpeculationPoisonRegister(); // Control-flow integrity: // Define a function entrypoint. This doesn't emit any code for this // architecture, as control-flow integrity is not supported for it. void CodeEntry() {} // Define an exception handler. void ExceptionHandler() {} // Define an exception handler and bind a label. void BindExceptionHandler(Label* label) { bind(label); } // --------------------------------------------------------------------------- // Pointer compression support // Loads a field containing a HeapObject and decompresses it if pointer // compression is enabled. void LoadTaggedPointerField(Register destination, Operand field_operand); // Loads a field containing any tagged value and decompresses it if necessary. void LoadAnyTaggedField(Register destination, Operand field_operand); // Loads a field containing a HeapObject, decompresses it if necessary and // pushes full pointer to the stack. When pointer compression is enabled, // uses |scratch| to decompress the value. void PushTaggedPointerField(Operand field_operand, Register scratch); // Loads a field containing any tagged value, decompresses it if necessary and // pushes the full pointer to the stack. When pointer compression is enabled, // uses |scratch| to decompress the value. void PushTaggedAnyField(Operand field_operand, Register scratch); // Loads a field containing smi value and untags it. void SmiUntagField(Register dst, Operand src); // Compresses tagged value if necessary and stores it to given on-heap // location. void StoreTaggedField(Operand dst_field_operand, Immediate immediate); void StoreTaggedField(Operand dst_field_operand, Register value); // The following macros work even when pointer compression is not enabled. void DecompressTaggedSigned(Register destination, Operand field_operand); void DecompressTaggedPointer(Register destination, Operand field_operand); void DecompressTaggedPointer(Register destination, Register source); void DecompressAnyTagged(Register destination, Operand field_operand); // --------------------------------------------------------------------------- // V8 Heap sandbox support // Loads a field containing off-heap pointer and does necessary decoding // if V8 heap sandbox is enabled. void LoadExternalPointerField(Register destination, Operand field_operand, ExternalPointerTag tag); protected: static const int kSmiShift = kSmiTagSize + kSmiShiftSize; // Returns a register holding the smi value. The register MUST NOT be // modified. It may be the "smi 1 constant" register. Register GetSmiConstant(Smi value); void CallRecordWriteStub(Register object, Register address, RememberedSetAction remembered_set_action, SaveFPRegsMode fp_mode, Handle<Code> code_target, Address wasm_target); }; // MacroAssembler implements a collection of frequently used macros. class V8_EXPORT_PRIVATE MacroAssembler : public TurboAssembler { public: using TurboAssembler::TurboAssembler; // Loads and stores the value of an external reference. // Special case code for load and store to take advantage of // load_rax/store_rax if possible/necessary. // For other operations, just use: // Operand operand = ExternalReferenceAsOperand(extref); // operation(operand, ..); void Load(Register destination, ExternalReference source); void Store(ExternalReference destination, Register source); // Pushes the address of the external reference onto the stack. void PushAddress(ExternalReference source); // Operations on roots in the root-array. // Load a root value where the index (or part of it) is variable. // The variable_offset register is added to the fixed_offset value // to get the index into the root-array. void PushRoot(RootIndex index); // Compare the object in a register to a value and jump if they are equal. void JumpIfRoot(Register with, RootIndex index, Label* if_equal, Label::Distance if_equal_distance = Label::kFar) { CompareRoot(with, index); j(equal, if_equal, if_equal_distance); } void JumpIfRoot(Operand with, RootIndex index, Label* if_equal, Label::Distance if_equal_distance = Label::kFar) { CompareRoot(with, index); j(equal, if_equal, if_equal_distance); } // Compare the object in a register to a value and jump if they are not equal. void JumpIfNotRoot(Register with, RootIndex index, Label* if_not_equal, Label::Distance if_not_equal_distance = Label::kFar) { CompareRoot(with, index); j(not_equal, if_not_equal, if_not_equal_distance); } void JumpIfNotRoot(Operand with, RootIndex index, Label* if_not_equal, Label::Distance if_not_equal_distance = Label::kFar) { CompareRoot(with, index); j(not_equal, if_not_equal, if_not_equal_distance); } // --------------------------------------------------------------------------- // GC Support // Notify the garbage collector that we wrote a pointer into an object. // |object| is the object being stored into, |value| is the object being // stored. value and scratch registers are clobbered by the operation. // The offset is the offset from the start of the object, not the offset from // the tagged HeapObject pointer. For use with FieldOperand(reg, off). void RecordWriteField( Register object, int offset, Register value, Register scratch, SaveFPRegsMode save_fp, RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, SmiCheck smi_check = INLINE_SMI_CHECK); // For page containing |object| mark region covering |address| // dirty. |object| is the object being stored into, |value| is the // object being stored. The address and value registers are clobbered by the // operation. RecordWrite filters out smis so it does not update // the write barrier if the value is a smi. void RecordWrite( Register object, Register address, Register value, SaveFPRegsMode save_fp, RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, SmiCheck smi_check = INLINE_SMI_CHECK); // Frame restart support. void MaybeDropFrames(); // Enter specific kind of exit frame; either in normal or // debug mode. Expects the number of arguments in register rax and // sets up the number of arguments in register rdi and the pointer // to the first argument in register rsi. // // Allocates arg_stack_space * kSystemPointerSize memory (not GCed) on the // stack accessible via StackSpaceOperand. void EnterExitFrame(int arg_stack_space = 0, bool save_doubles = false, StackFrame::Type frame_type = StackFrame::EXIT); // Enter specific kind of exit frame. Allocates // (arg_stack_space * kSystemPointerSize) memory (not GCed) on the stack // accessible via StackSpaceOperand. void EnterApiExitFrame(int arg_stack_space); // Leave the current exit frame. Expects/provides the return value in // register rax:rdx (untouched) and the pointer to the first // argument in register rsi (if pop_arguments == true). void LeaveExitFrame(bool save_doubles = false, bool pop_arguments = true); // Leave the current exit frame. Expects/provides the return value in // register rax (untouched). void LeaveApiExitFrame(); // --------------------------------------------------------------------------- // JavaScript invokes // Invoke the JavaScript function code by either calling or jumping. void InvokeFunctionCode(Register function, Register new_target, Register expected_parameter_count, Register actual_parameter_count, InvokeFlag flag); // On function call, call into the debugger. void CallDebugOnFunctionCall(Register fun, Register new_target, Register expected_parameter_count, Register actual_parameter_count); // Invoke the JavaScript function in the given register. Changes the // current context to the context in the function before invoking. void InvokeFunction(Register function, Register new_target, Register actual_parameter_count, InvokeFlag flag); void InvokeFunction(Register function, Register new_target, Register expected_parameter_count, Register actual_parameter_count, InvokeFlag flag); // --------------------------------------------------------------------------- // Conversions between tagged smi values and non-tagged integer values. // Tag an word-size value. The result must be known to be a valid smi value. void SmiTag(Register reg); // Requires dst != src void SmiTag(Register dst, Register src); // Simple comparison of smis. Both sides must be known smis to use these, // otherwise use Cmp. void SmiCompare(Register smi1, Register smi2); void SmiCompare(Register dst, Smi src); void SmiCompare(Register dst, Operand src); void SmiCompare(Operand dst, Register src); void SmiCompare(Operand dst, Smi src); // Functions performing a check on a known or potential smi. Returns // a condition that is satisfied if the check is successful. // Test-and-jump functions. Typically combines a check function // above with a conditional jump. // Jump to label if the value is not a tagged smi. void JumpIfNotSmi(Register src, Label* on_not_smi, Label::Distance near_jump = Label::kFar); // Jump to label if the value is not a tagged smi. void JumpIfNotSmi(Operand src, Label* on_not_smi, Label::Distance near_jump = Label::kFar); // Operations on tagged smi values. // Smis represent a subset of integers. The subset is always equivalent to // a two's complement interpretation of a fixed number of bits. // Add an integer constant to a tagged smi, giving a tagged smi as result. // No overflow testing on the result is done. void SmiAddConstant(Operand dst, Smi constant); // Specialized operations // Converts, if necessary, a smi to a combination of number and // multiplier to be used as a scaled index. // The src register contains a *positive* smi value. The shift is the // power of two to multiply the index value by (e.g. to index by // smi-value * kSystemPointerSize, pass the smi and kSystemPointerSizeLog2). // The returned index register may be either src or dst, depending // on what is most efficient. If src and dst are different registers, // src is always unchanged. SmiIndex SmiToIndex(Register dst, Register src, int shift); // --------------------------------------------------------------------------- // Macro instructions. void Cmp(Register dst, Handle<Object> source); void Cmp(Operand dst, Handle<Object> source); void Cmp(Register dst, Smi src); void Cmp(Operand dst, Smi src); // Checks if value is in range [lower_limit, higher_limit] using a single // comparison. void JumpIfIsInRange(Register value, unsigned lower_limit, unsigned higher_limit, Label* on_in_range, Label::Distance near_jump = Label::kFar); // Emit code to discard a non-negative number of pointer-sized elements // from the stack, clobbering only the rsp register. void Drop(int stack_elements); // Emit code to discard a positive number of pointer-sized elements // from the stack under the return address which remains on the top, // clobbering the rsp register. void DropUnderReturnAddress(int stack_elements, Register scratch = kScratchRegister); void PushQuad(Operand src); void PushImm32(int32_t imm32); void Pop(Register dst); void Pop(Operand dst); void PopQuad(Operand dst); // --------------------------------------------------------------------------- // SIMD macros. void Absps(XMMRegister dst); void Negps(XMMRegister dst); void Abspd(XMMRegister dst); void Negpd(XMMRegister dst); // Generates a trampoline to jump to the off-heap instruction stream. void JumpToInstructionStream(Address entry); // Compare object type for heap object. // Always use unsigned comparisons: above and below, not less and greater. // Incoming register is heap_object and outgoing register is map. // They may be the same register, and may be kScratchRegister. void CmpObjectType(Register heap_object, InstanceType type, Register map); // Compare instance type for map. // Always use unsigned comparisons: above and below, not less and greater. void CmpInstanceType(Register map, InstanceType type); template <typename Field> void DecodeField(Register reg) { static const int shift = Field::kShift; static const int mask = Field::kMask >> Field::kShift; if (shift != 0) { shrq(reg, Immediate(shift)); } andq(reg, Immediate(mask)); } // Abort execution if argument is a smi, enabled via --debug-code. void AssertNotSmi(Register object); // Abort execution if argument is not a smi, enabled via --debug-code. void AssertSmi(Register object); void AssertSmi(Operand object); // Abort execution if argument is not a Constructor, enabled via --debug-code. void AssertConstructor(Register object); // Abort execution if argument is not a JSFunction, enabled via --debug-code. void AssertFunction(Register object); // Abort execution if argument is not a JSBoundFunction, // enabled via --debug-code. void AssertBoundFunction(Register object); // Abort execution if argument is not a JSGeneratorObject (or subclass), // enabled via --debug-code. void AssertGeneratorObject(Register object); // Abort execution if argument is not undefined or an AllocationSite, enabled // via --debug-code. void AssertUndefinedOrAllocationSite(Register object); // --------------------------------------------------------------------------- // Exception handling // Push a new stack handler and link it into stack handler chain. void PushStackHandler(); // Unlink the stack handler on top of the stack from the stack handler chain. void PopStackHandler(); // --------------------------------------------------------------------------- // Support functions. // Load the global proxy from the current context. void LoadGlobalProxy(Register dst) { LoadNativeContextSlot(Context::GLOBAL_PROXY_INDEX, dst); } // Load the native context slot with the current index. void LoadNativeContextSlot(int index, Register dst); // --------------------------------------------------------------------------- // Runtime calls // Call a runtime routine. void CallRuntime(const Runtime::Function* f, int num_arguments, SaveFPRegsMode save_doubles = kDontSaveFPRegs); // Convenience function: Same as above, but takes the fid instead. void CallRuntime(Runtime::FunctionId fid, SaveFPRegsMode save_doubles = kDontSaveFPRegs) { const Runtime::Function* function = Runtime::FunctionForId(fid); CallRuntime(function, function->nargs, save_doubles); } // Convenience function: Same as above, but takes the fid instead. void CallRuntime(Runtime::FunctionId fid, int num_arguments, SaveFPRegsMode save_doubles = kDontSaveFPRegs) { CallRuntime(Runtime::FunctionForId(fid), num_arguments, save_doubles); } // Convenience function: tail call a runtime routine (jump) void TailCallRuntime(Runtime::FunctionId fid); // Jump to a runtime routines void JumpToExternalReference(const ExternalReference& ext, bool builtin_exit_frame = false); // --------------------------------------------------------------------------- // StatsCounter support void IncrementCounter(StatsCounter* counter, int value); void DecrementCounter(StatsCounter* counter, int value); // --------------------------------------------------------------------------- // In-place weak references. void LoadWeakValue(Register in_out, Label* target_if_cleared); // --------------------------------------------------------------------------- // Debugging static int SafepointRegisterStackIndex(Register reg) { return SafepointRegisterStackIndex(reg.code()); } private: // Order general registers are pushed by Pushad. // rax, rcx, rdx, rbx, rsi, rdi, r8, r9, r11, r12, r14, r15. static const int kSafepointPushRegisterIndices[Register::kNumRegisters]; static const int kNumSafepointSavedRegisters = 12; // Helper functions for generating invokes. void InvokePrologue(Register expected_parameter_count, Register actual_parameter_count, Label* done, InvokeFlag flag); void EnterExitFramePrologue(bool save_rax, StackFrame::Type frame_type); // Allocates arg_stack_space * kSystemPointerSize memory (not GCed) on the // stack accessible via StackSpaceOperand. void EnterExitFrameEpilogue(int arg_stack_space, bool save_doubles); void LeaveExitFrameEpilogue(); // Compute memory operands for safepoint stack slots. static int SafepointRegisterStackIndex(int reg_code) { return kNumSafepointRegisters - kSafepointPushRegisterIndices[reg_code] - 1; } // Needs access to SafepointRegisterStackIndex for compiled frame // traversal. friend class CommonFrame; DISALLOW_IMPLICIT_CONSTRUCTORS(MacroAssembler); }; // ----------------------------------------------------------------------------- // Static helper functions. // Generate an Operand for loading a field from an object. inline Operand FieldOperand(Register object, int offset) { return Operand(object, offset - kHeapObjectTag); } // Generate an Operand for loading an indexed field from an object. inline Operand FieldOperand(Register object, Register index, ScaleFactor scale, int offset) { return Operand(object, index, scale, offset - kHeapObjectTag); } // Provides access to exit frame stack space (not GCed). inline Operand StackSpaceOperand(int index) { #ifdef V8_TARGET_OS_WIN const int kShaddowSpace = 4; return Operand(rsp, (index + kShaddowSpace) * kSystemPointerSize); #else return Operand(rsp, index * kSystemPointerSize); #endif } inline Operand StackOperandForReturnAddress(int32_t disp) { return Operand(rsp, disp); } #define ACCESS_MASM(masm) masm-> } // namespace internal } // namespace v8 #endif // V8_CODEGEN_X64_MACRO_ASSEMBLER_X64_H_