| // Copyright 2014 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 V8_PPC_MACRO_ASSEMBLER_PPC_H_ |
| #define V8_PPC_MACRO_ASSEMBLER_PPC_H_ |
| |
| #include "src/assembler.h" |
| #include "src/bailout-reason.h" |
| #include "src/double.h" |
| #include "src/globals.h" |
| #include "src/ppc/assembler-ppc.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Give alias names to registers for calling conventions. |
| const Register kReturnRegister0 = r3; |
| const Register kReturnRegister1 = r4; |
| const Register kReturnRegister2 = r5; |
| const Register kJSFunctionRegister = r4; |
| const Register kContextRegister = r30; |
| const Register kAllocateSizeRegister = r4; |
| const Register kInterpreterAccumulatorRegister = r3; |
| const Register kInterpreterBytecodeOffsetRegister = r15; |
| const Register kInterpreterBytecodeArrayRegister = r16; |
| const Register kInterpreterDispatchTableRegister = r17; |
| const Register kJavaScriptCallArgCountRegister = r3; |
| const Register kJavaScriptCallNewTargetRegister = r6; |
| const Register kRuntimeCallFunctionRegister = r4; |
| const Register kRuntimeCallArgCountRegister = r3; |
| |
| // ---------------------------------------------------------------------------- |
| // Static helper functions |
| |
| // Generate a MemOperand for loading a field from an object. |
| inline MemOperand FieldMemOperand(Register object, int offset) { |
| return MemOperand(object, offset - kHeapObjectTag); |
| } |
| |
| |
| // Flags used for AllocateHeapNumber |
| enum TaggingMode { |
| // Tag the result. |
| TAG_RESULT, |
| // Don't tag |
| DONT_TAG_RESULT |
| }; |
| |
| |
| enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET }; |
| enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK }; |
| enum LinkRegisterStatus { kLRHasNotBeenSaved, kLRHasBeenSaved }; |
| |
| |
| Register GetRegisterThatIsNotOneOf(Register reg1, Register reg2 = no_reg, |
| Register reg3 = no_reg, |
| Register reg4 = no_reg, |
| Register reg5 = no_reg, |
| Register reg6 = no_reg); |
| |
| |
| #ifdef DEBUG |
| bool AreAliased(Register reg1, Register reg2, Register reg3 = no_reg, |
| Register reg4 = no_reg, Register reg5 = no_reg, |
| Register reg6 = no_reg, Register reg7 = no_reg, |
| Register reg8 = no_reg, Register reg9 = no_reg, |
| Register reg10 = no_reg); |
| bool AreAliased(DoubleRegister reg1, DoubleRegister reg2, |
| DoubleRegister reg3 = no_dreg, DoubleRegister reg4 = no_dreg, |
| DoubleRegister reg5 = no_dreg, DoubleRegister reg6 = no_dreg, |
| DoubleRegister reg7 = no_dreg, DoubleRegister reg8 = no_dreg, |
| DoubleRegister reg9 = no_dreg, DoubleRegister reg10 = no_dreg); |
| #endif |
| |
| // These exist to provide portability between 32 and 64bit |
| #if V8_TARGET_ARCH_PPC64 |
| #define LoadPX ldx |
| #define LoadPUX ldux |
| #define StorePX stdx |
| #define StorePUX stdux |
| #define ShiftLeftImm sldi |
| #define ShiftRightImm srdi |
| #define ClearLeftImm clrldi |
| #define ClearRightImm clrrdi |
| #define ShiftRightArithImm sradi |
| #define ShiftLeft_ sld |
| #define ShiftRight_ srd |
| #define ShiftRightArith srad |
| #define Mul mulld |
| #define Div divd |
| #else |
| #define LoadPX lwzx |
| #define LoadPUX lwzux |
| #define StorePX stwx |
| #define StorePUX stwux |
| #define ShiftLeftImm slwi |
| #define ShiftRightImm srwi |
| #define ClearLeftImm clrlwi |
| #define ClearRightImm clrrwi |
| #define ShiftRightArithImm srawi |
| #define ShiftLeft_ slw |
| #define ShiftRight_ srw |
| #define ShiftRightArith sraw |
| #define Mul mullw |
| #define Div divw |
| #endif |
| |
| class TurboAssembler : public Assembler { |
| public: |
| TurboAssembler(Isolate* isolate, void* buffer, int buffer_size, |
| CodeObjectRequired create_code_object); |
| |
| void set_has_frame(bool value) { has_frame_ = value; } |
| bool has_frame() { return has_frame_; } |
| |
| Isolate* isolate() const { return isolate_; } |
| |
| Handle<HeapObject> CodeObject() { |
| DCHECK(!code_object_.is_null()); |
| return code_object_; |
| } |
| // Converts the integer (untagged smi) in |src| to a double, storing |
| // the result to |dst| |
| void ConvertIntToDouble(Register src, DoubleRegister dst); |
| |
| // Converts the unsigned integer (untagged smi) in |src| to |
| // a double, storing the result to |dst| |
| void ConvertUnsignedIntToDouble(Register src, DoubleRegister dst); |
| |
| // Converts the integer (untagged smi) in |src| to |
| // a float, storing the result in |dst| |
| void ConvertIntToFloat(Register src, DoubleRegister dst); |
| |
| // Converts the unsigned integer (untagged smi) in |src| to |
| // a float, storing the result in |dst| |
| void ConvertUnsignedIntToFloat(Register src, DoubleRegister dst); |
| |
| #if V8_TARGET_ARCH_PPC64 |
| void ConvertInt64ToFloat(Register src, DoubleRegister double_dst); |
| void ConvertInt64ToDouble(Register src, DoubleRegister double_dst); |
| void ConvertUnsignedInt64ToFloat(Register src, DoubleRegister double_dst); |
| void ConvertUnsignedInt64ToDouble(Register src, DoubleRegister double_dst); |
| #endif |
| |
| // Converts the double_input to an integer. Note that, upon return, |
| // the contents of double_dst will also hold the fixed point representation. |
| void ConvertDoubleToInt64(const DoubleRegister double_input, |
| #if !V8_TARGET_ARCH_PPC64 |
| const Register dst_hi, |
| #endif |
| const Register dst, const DoubleRegister double_dst, |
| FPRoundingMode rounding_mode = kRoundToZero); |
| |
| #if V8_TARGET_ARCH_PPC64 |
| // Converts the double_input to an unsigned integer. Note that, upon return, |
| // the contents of double_dst will also hold the fixed point representation. |
| void ConvertDoubleToUnsignedInt64( |
| const DoubleRegister double_input, const Register dst, |
| const DoubleRegister double_dst, |
| FPRoundingMode rounding_mode = kRoundToZero); |
| #endif |
| |
| // Activation support. |
| void EnterFrame(StackFrame::Type type, |
| bool load_constant_pool_pointer_reg = false); |
| |
| // Returns the pc offset at which the frame ends. |
| int LeaveFrame(StackFrame::Type type, int stack_adjustment = 0); |
| |
| // Push a fixed frame, consisting of lr, fp, constant pool. |
| void PushCommonFrame(Register marker_reg = no_reg); |
| |
| // Generates function and stub prologue code. |
| void StubPrologue(StackFrame::Type type, Register base = no_reg, |
| int prologue_offset = 0); |
| void Prologue(Register base, int prologue_offset = 0); |
| |
| // Push a standard frame, consisting of lr, fp, constant pool, |
| // context and JS function |
| void PushStandardFrame(Register function_reg); |
| |
| // Restore caller's frame pointer and return address prior to being |
| // overwritten by tail call stack preparation. |
| void RestoreFrameStateForTailCall(); |
| |
| // Get the actual activation frame alignment for target environment. |
| static int ActivationFrameAlignment(); |
| |
| void InitializeRootRegister() { |
| ExternalReference roots_array_start = |
| ExternalReference::roots_array_start(isolate()); |
| mov(kRootRegister, Operand(roots_array_start)); |
| } |
| |
| // These exist to provide portability between 32 and 64bit |
| void LoadP(Register dst, const MemOperand& mem, Register scratch = no_reg); |
| void LoadPU(Register dst, const MemOperand& mem, Register scratch = no_reg); |
| void LoadWordArith(Register dst, const MemOperand& mem, |
| Register scratch = no_reg); |
| void StoreP(Register src, const MemOperand& mem, Register scratch = no_reg); |
| void StorePU(Register src, const MemOperand& mem, Register scratch = no_reg); |
| |
| void LoadDouble(DoubleRegister dst, const MemOperand& mem, |
| Register scratch = no_reg); |
| void LoadDoubleLiteral(DoubleRegister result, Double value, Register scratch); |
| |
| // load a literal signed int value <value> to GPR <dst> |
| void LoadIntLiteral(Register dst, int value); |
| // load an SMI value <value> to GPR <dst> |
| void LoadSmiLiteral(Register dst, Smi* smi); |
| |
| void LoadSingle(DoubleRegister dst, const MemOperand& mem, |
| Register scratch = no_reg); |
| void LoadSingleU(DoubleRegister dst, const MemOperand& mem, |
| Register scratch = no_reg); |
| |
| void StoreDouble(DoubleRegister src, const MemOperand& mem, |
| Register scratch = no_reg); |
| void StoreDoubleU(DoubleRegister src, const MemOperand& mem, |
| Register scratch = no_reg); |
| |
| void StoreSingle(DoubleRegister src, const MemOperand& mem, |
| Register scratch = no_reg); |
| void StoreSingleU(DoubleRegister src, const MemOperand& mem, |
| Register scratch = no_reg); |
| |
| void Cmpli(Register src1, const Operand& src2, Register scratch, |
| CRegister cr = cr7); |
| void Cmpwi(Register src1, const Operand& src2, Register scratch, |
| CRegister cr = cr7); |
| // Set new rounding mode RN to FPSCR |
| void SetRoundingMode(FPRoundingMode RN); |
| |
| // reset rounding mode to default (kRoundToNearest) |
| void ResetRoundingMode(); |
| void Add(Register dst, Register src, intptr_t value, Register scratch); |
| |
| void Push(Register src) { push(src); } |
| // Push a handle. |
| void Push(Handle<HeapObject> handle); |
| void Push(Smi* smi); |
| |
| // Push two registers. Pushes leftmost register first (to highest address). |
| void Push(Register src1, Register src2) { |
| StorePU(src2, MemOperand(sp, -2 * kPointerSize)); |
| StoreP(src1, MemOperand(sp, kPointerSize)); |
| } |
| |
| // Push three registers. Pushes leftmost register first (to highest address). |
| void Push(Register src1, Register src2, Register src3) { |
| StorePU(src3, MemOperand(sp, -3 * kPointerSize)); |
| StoreP(src2, MemOperand(sp, kPointerSize)); |
| StoreP(src1, MemOperand(sp, 2 * kPointerSize)); |
| } |
| |
| // Push four registers. Pushes leftmost register first (to highest address). |
| void Push(Register src1, Register src2, Register src3, Register src4) { |
| StorePU(src4, MemOperand(sp, -4 * kPointerSize)); |
| StoreP(src3, MemOperand(sp, kPointerSize)); |
| StoreP(src2, MemOperand(sp, 2 * kPointerSize)); |
| StoreP(src1, MemOperand(sp, 3 * kPointerSize)); |
| } |
| |
| // Push five registers. Pushes leftmost register first (to highest address). |
| void Push(Register src1, Register src2, Register src3, Register src4, |
| Register src5) { |
| StorePU(src5, MemOperand(sp, -5 * kPointerSize)); |
| StoreP(src4, MemOperand(sp, kPointerSize)); |
| StoreP(src3, MemOperand(sp, 2 * kPointerSize)); |
| StoreP(src2, MemOperand(sp, 3 * kPointerSize)); |
| StoreP(src1, MemOperand(sp, 4 * kPointerSize)); |
| } |
| |
| void Pop(Register dst) { pop(dst); } |
| |
| // Pop two registers. Pops rightmost register first (from lower address). |
| void Pop(Register src1, Register src2) { |
| LoadP(src2, MemOperand(sp, 0)); |
| LoadP(src1, MemOperand(sp, kPointerSize)); |
| addi(sp, sp, Operand(2 * kPointerSize)); |
| } |
| |
| // Pop three registers. Pops rightmost register first (from lower address). |
| void Pop(Register src1, Register src2, Register src3) { |
| LoadP(src3, MemOperand(sp, 0)); |
| LoadP(src2, MemOperand(sp, kPointerSize)); |
| LoadP(src1, MemOperand(sp, 2 * kPointerSize)); |
| addi(sp, sp, Operand(3 * kPointerSize)); |
| } |
| |
| // Pop four registers. Pops rightmost register first (from lower address). |
| void Pop(Register src1, Register src2, Register src3, Register src4) { |
| LoadP(src4, MemOperand(sp, 0)); |
| LoadP(src3, MemOperand(sp, kPointerSize)); |
| LoadP(src2, MemOperand(sp, 2 * kPointerSize)); |
| LoadP(src1, MemOperand(sp, 3 * kPointerSize)); |
| addi(sp, sp, Operand(4 * kPointerSize)); |
| } |
| |
| // Pop five registers. Pops rightmost register first (from lower address). |
| void Pop(Register src1, Register src2, Register src3, Register src4, |
| Register src5) { |
| LoadP(src5, MemOperand(sp, 0)); |
| LoadP(src4, MemOperand(sp, kPointerSize)); |
| LoadP(src3, MemOperand(sp, 2 * kPointerSize)); |
| LoadP(src2, MemOperand(sp, 3 * kPointerSize)); |
| LoadP(src1, MemOperand(sp, 4 * kPointerSize)); |
| addi(sp, sp, Operand(5 * kPointerSize)); |
| } |
| |
| void SaveRegisters(RegList registers); |
| void RestoreRegisters(RegList registers); |
| |
| void CallRecordWriteStub(Register object, Register address, |
| RememberedSetAction remembered_set_action, |
| SaveFPRegsMode fp_mode); |
| |
| void MultiPush(RegList regs, Register location = sp); |
| void MultiPop(RegList regs, Register location = sp); |
| |
| void MultiPushDoubles(RegList dregs, Register location = sp); |
| void MultiPopDoubles(RegList dregs, Register location = sp); |
| |
| // 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; |
| |
| // 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); |
| |
| // Load an object from the root table. |
| void LoadRoot(Register destination, Heap::RootListIndex index, |
| Condition cond = al); |
| |
| void SwapP(Register src, Register dst, Register scratch); |
| void SwapP(Register src, MemOperand dst, Register scratch); |
| void SwapP(MemOperand src, MemOperand dst, Register scratch_0, |
| Register scratch_1); |
| void SwapFloat32(DoubleRegister src, DoubleRegister dst, |
| DoubleRegister scratch); |
| void SwapFloat32(DoubleRegister src, MemOperand dst, DoubleRegister scratch); |
| void SwapFloat32(MemOperand src, MemOperand dst, DoubleRegister scratch_0, |
| DoubleRegister scratch_1); |
| void SwapDouble(DoubleRegister src, DoubleRegister dst, |
| DoubleRegister scratch); |
| void SwapDouble(DoubleRegister src, MemOperand dst, DoubleRegister scratch); |
| void SwapDouble(MemOperand src, MemOperand dst, DoubleRegister scratch_0, |
| DoubleRegister scratch_1); |
| |
| // Before calling a C-function from generated code, align arguments on stack. |
| // After aligning the frame, non-register arguments must be stored in |
| // sp[0], sp[4], etc., not pushed. The argument count assumes all arguments |
| // are word sized. If double arguments are used, this function assumes that |
| // all double arguments are stored before core registers; otherwise the |
| // correct alignment of the double values is not guaranteed. |
| // Some compilers/platforms require the stack to be aligned when calling |
| // C++ code. |
| // Needs a scratch register to do some arithmetic. This register will be |
| // trashed. |
| void PrepareCallCFunction(int num_reg_arguments, int num_double_registers, |
| Register scratch); |
| void PrepareCallCFunction(int num_reg_arguments, Register scratch); |
| |
| void PrepareForTailCall(const ParameterCount& callee_args_count, |
| Register caller_args_count_reg, Register scratch0, |
| Register scratch1); |
| |
| // There are two ways of passing double arguments on ARM, depending on |
| // whether soft or hard floating point ABI is used. These functions |
| // abstract parameter passing for the three different ways we call |
| // C functions from generated code. |
| void MovToFloatParameter(DoubleRegister src); |
| void MovToFloatParameters(DoubleRegister src1, DoubleRegister src2); |
| void MovToFloatResult(DoubleRegister src); |
| |
| // 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); |
| void CallCFunction(ExternalReference function, int num_reg_arguments, |
| int num_double_arguments); |
| void CallCFunction(Register function, int num_reg_arguments, |
| int num_double_arguments); |
| |
| void CallRuntimeDelayed(Zone* zone, Runtime::FunctionId fid, |
| SaveFPRegsMode save_doubles = kDontSaveFPRegs); |
| void MovFromFloatParameter(DoubleRegister dst); |
| void MovFromFloatResult(DoubleRegister dst); |
| |
| // Calls Abort(msg) if the condition cond is not satisfied. |
| // Use --debug_code to enable. |
| void Assert(Condition cond, AbortReason reason, CRegister cr = cr7); |
| |
| // Like Assert(), but always enabled. |
| void Check(Condition cond, AbortReason reason, CRegister cr = cr7); |
| |
| // Print a message to stdout and abort execution. |
| void Abort(AbortReason reason); |
| |
| inline bool AllowThisStubCall(CodeStub* stub); |
| #if !V8_TARGET_ARCH_PPC64 |
| void ShiftLeftPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, Register scratch, Register shift); |
| void ShiftLeftPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, uint32_t shift); |
| void ShiftRightPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, Register scratch, Register shift); |
| void ShiftRightPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, uint32_t shift); |
| void ShiftRightAlgPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, Register scratch, Register shift); |
| void ShiftRightAlgPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, uint32_t shift); |
| #endif |
| // Returns the size of a call in instructions. Note, the value returned is |
| // only valid as long as no entries are added to the constant pool between |
| // checking the call size and emitting the actual call. |
| static int CallSize(Register target); |
| int CallSize(Address target, RelocInfo::Mode rmode, Condition cond = al); |
| |
| // Jump, Call, and Ret pseudo instructions implementing inter-working. |
| void Jump(Register target); |
| void Jump(Address target, RelocInfo::Mode rmode, Condition cond = al, |
| CRegister cr = cr7); |
| void Jump(Handle<Code> code, RelocInfo::Mode rmode, Condition cond = al, |
| CRegister cr = cr7); |
| void Call(Register target); |
| void Call(Address target, RelocInfo::Mode rmode, Condition cond = al); |
| int CallSize(Handle<Code> code, |
| RelocInfo::Mode rmode = RelocInfo::CODE_TARGET, |
| Condition cond = al); |
| void Call(Handle<Code> code, RelocInfo::Mode rmode = RelocInfo::CODE_TARGET, |
| Condition cond = al); |
| void Call(Label* target); |
| |
| void CallForDeoptimization(Address target, RelocInfo::Mode rmode) { |
| Call(target, rmode); |
| } |
| |
| // Emit code to discard a non-negative number of pointer-sized elements |
| // from the stack, clobbering only the sp register. |
| void Drop(int count); |
| void Drop(Register count, Register scratch = r0); |
| |
| void Ret() { blr(); } |
| void Ret(Condition cond, CRegister cr = cr7) { bclr(cond, cr); } |
| void Ret(int drop) { |
| Drop(drop); |
| blr(); |
| } |
| |
| // If the value is a NaN, canonicalize the value else, do nothing. |
| void CanonicalizeNaN(const DoubleRegister dst, const DoubleRegister src); |
| void CanonicalizeNaN(const DoubleRegister value) { |
| CanonicalizeNaN(value, value); |
| } |
| void CheckPageFlag(Register object, Register scratch, int mask, Condition cc, |
| Label* condition_met); |
| |
| // Move values between integer and floating point registers. |
| void MovIntToDouble(DoubleRegister dst, Register src, Register scratch); |
| void MovUnsignedIntToDouble(DoubleRegister dst, Register src, |
| Register scratch); |
| void MovInt64ToDouble(DoubleRegister dst, |
| #if !V8_TARGET_ARCH_PPC64 |
| Register src_hi, |
| #endif |
| Register src); |
| #if V8_TARGET_ARCH_PPC64 |
| void MovInt64ComponentsToDouble(DoubleRegister dst, Register src_hi, |
| Register src_lo, Register scratch); |
| #endif |
| void InsertDoubleLow(DoubleRegister dst, Register src, Register scratch); |
| void InsertDoubleHigh(DoubleRegister dst, Register src, Register scratch); |
| void MovDoubleLowToInt(Register dst, DoubleRegister src); |
| void MovDoubleHighToInt(Register dst, DoubleRegister src); |
| void MovDoubleToInt64( |
| #if !V8_TARGET_ARCH_PPC64 |
| Register dst_hi, |
| #endif |
| Register dst, DoubleRegister src); |
| void MovIntToFloat(DoubleRegister dst, Register src); |
| void MovFloatToInt(Register dst, DoubleRegister src); |
| // Register move. May do nothing if the registers are identical. |
| void Move(Register dst, Smi* smi) { LoadSmiLiteral(dst, smi); } |
| void Move(Register dst, Handle<HeapObject> value); |
| void Move(Register dst, Register src, Condition cond = al); |
| void Move(DoubleRegister dst, DoubleRegister src); |
| |
| void SmiUntag(Register reg, RCBit rc = LeaveRC) { SmiUntag(reg, reg, rc); } |
| |
| void SmiUntag(Register dst, Register src, RCBit rc = LeaveRC) { |
| ShiftRightArithImm(dst, src, kSmiShift, rc); |
| } |
| // --------------------------------------------------------------------------- |
| // Bit testing/extraction |
| // |
| // Bit numbering is such that the least significant bit is bit 0 |
| // (for consistency between 32/64-bit). |
| |
| // Extract consecutive bits (defined by rangeStart - rangeEnd) from src |
| // and, if !test, shift them into the least significant bits of dst. |
| inline void ExtractBitRange(Register dst, Register src, int rangeStart, |
| int rangeEnd, RCBit rc = LeaveRC, |
| bool test = false) { |
| DCHECK(rangeStart >= rangeEnd && rangeStart < kBitsPerPointer); |
| int rotate = (rangeEnd == 0) ? 0 : kBitsPerPointer - rangeEnd; |
| int width = rangeStart - rangeEnd + 1; |
| if (rc == SetRC && rangeStart < 16 && (rangeEnd == 0 || test)) { |
| // Prefer faster andi when applicable. |
| andi(dst, src, Operand(((1 << width) - 1) << rangeEnd)); |
| } else { |
| #if V8_TARGET_ARCH_PPC64 |
| rldicl(dst, src, rotate, kBitsPerPointer - width, rc); |
| #else |
| rlwinm(dst, src, rotate, kBitsPerPointer - width, kBitsPerPointer - 1, |
| rc); |
| #endif |
| } |
| } |
| |
| inline void ExtractBit(Register dst, Register src, uint32_t bitNumber, |
| RCBit rc = LeaveRC, bool test = false) { |
| ExtractBitRange(dst, src, bitNumber, bitNumber, rc, test); |
| } |
| |
| // Extract consecutive bits (defined by mask) from src and place them |
| // into the least significant bits of dst. |
| inline void ExtractBitMask(Register dst, Register src, uintptr_t mask, |
| RCBit rc = LeaveRC, bool test = false) { |
| int start = kBitsPerPointer - 1; |
| int end; |
| uintptr_t bit = (1L << start); |
| |
| while (bit && (mask & bit) == 0) { |
| start--; |
| bit >>= 1; |
| } |
| end = start; |
| bit >>= 1; |
| |
| while (bit && (mask & bit)) { |
| end--; |
| bit >>= 1; |
| } |
| |
| // 1-bits in mask must be contiguous |
| DCHECK(bit == 0 || (mask & ((bit << 1) - 1)) == 0); |
| |
| ExtractBitRange(dst, src, start, end, rc, test); |
| } |
| |
| // Test single bit in value. |
| inline void TestBit(Register value, int bitNumber, Register scratch = r0) { |
| ExtractBitRange(scratch, value, bitNumber, bitNumber, SetRC, true); |
| } |
| |
| // Test consecutive bit range in value. Range is defined by mask. |
| inline void TestBitMask(Register value, uintptr_t mask, |
| Register scratch = r0) { |
| ExtractBitMask(scratch, value, mask, SetRC, true); |
| } |
| // Test consecutive bit range in value. Range is defined by |
| // rangeStart - rangeEnd. |
| inline void TestBitRange(Register value, int rangeStart, int rangeEnd, |
| Register scratch = r0) { |
| ExtractBitRange(scratch, value, rangeStart, rangeEnd, SetRC, true); |
| } |
| |
| inline void TestIfSmi(Register value, Register scratch) { |
| TestBitRange(value, kSmiTagSize - 1, 0, scratch); |
| } |
| // Jump the register contains a smi. |
| inline void JumpIfSmi(Register value, Label* smi_label) { |
| TestIfSmi(value, r0); |
| beq(smi_label, cr0); // branch if SMI |
| } |
| #if V8_TARGET_ARCH_PPC64 |
| inline void TestIfInt32(Register value, Register scratch, |
| CRegister cr = cr7) { |
| // High bits must be identical to fit into an 32-bit integer |
| extsw(scratch, value); |
| cmp(scratch, value, cr); |
| } |
| #else |
| inline void TestIfInt32(Register hi_word, Register lo_word, Register scratch, |
| CRegister cr = cr7) { |
| // High bits must be identical to fit into an 32-bit integer |
| srawi(scratch, lo_word, 31); |
| cmp(scratch, hi_word, cr); |
| } |
| #endif |
| |
| // Overflow handling functions. |
| // Usage: call the appropriate arithmetic function and then call one of the |
| // flow control functions with the corresponding label. |
| |
| // Compute dst = left + right, setting condition codes. dst may be same as |
| // either left or right (or a unique register). left and right must not be |
| // the same register. |
| void AddAndCheckForOverflow(Register dst, Register left, Register right, |
| Register overflow_dst, Register scratch = r0); |
| void AddAndCheckForOverflow(Register dst, Register left, intptr_t right, |
| Register overflow_dst, Register scratch = r0); |
| |
| // Compute dst = left - right, setting condition codes. dst may be same as |
| // either left or right (or a unique register). left and right must not be |
| // the same register. |
| void SubAndCheckForOverflow(Register dst, Register left, Register right, |
| Register overflow_dst, Register scratch = r0); |
| |
| // Performs a truncating conversion of a floating point number as used by |
| // the JS bitwise operations. See ECMA-262 9.5: ToInt32. Goes to 'done' if it |
| // succeeds, otherwise falls through if result is saturated. On return |
| // 'result' either holds answer, or is clobbered on fall through. |
| // |
| // Only public for the test code in test-code-stubs-arm.cc. |
| void TryInlineTruncateDoubleToI(Register result, DoubleRegister input, |
| Label* done); |
| void TruncateDoubleToIDelayed(Zone* zone, Register result, |
| DoubleRegister double_input); |
| |
| // Call a code stub. |
| void CallStubDelayed(CodeStub* stub); |
| |
| void LoadConstantPoolPointerRegister(); |
| void LoadConstantPoolPointerRegister(Register base, int code_entry_delta = 0); |
| void AbortConstantPoolBuilding() { |
| #ifdef DEBUG |
| // Avoid DCHECK(!is_linked()) failure in ~Label() |
| bind(ConstantPoolPosition()); |
| #endif |
| } |
| |
| private: |
| static const int kSmiShift = kSmiTagSize + kSmiShiftSize; |
| |
| bool has_frame_ = false; |
| Isolate* const isolate_; |
| // This handle will be patched with the code object on installation. |
| Handle<HeapObject> code_object_; |
| |
| void Jump(intptr_t target, RelocInfo::Mode rmode, Condition cond = al, |
| CRegister cr = cr7); |
| int CalculateStackPassedWords(int num_reg_arguments, |
| int num_double_arguments); |
| void CallCFunctionHelper(Register function, int num_reg_arguments, |
| int num_double_arguments); |
| }; |
| |
| // MacroAssembler implements a collection of frequently used acros. |
| class MacroAssembler : public TurboAssembler { |
| public: |
| MacroAssembler(Isolate* isolate, void* buffer, int size, |
| CodeObjectRequired create_code_object); |
| |
| // --------------------------------------------------------------------------- |
| // GC Support |
| |
| void IncrementalMarkingRecordWriteHelper(Register object, Register value, |
| Register address); |
| |
| // Record in the remembered set the fact that we have a pointer to new space |
| // at the address pointed to by the addr register. Only works if addr is not |
| // in new space. |
| void RememberedSetHelper(Register object, // Used for debug code. |
| Register addr, Register scratch, |
| SaveFPRegsMode save_fp); |
| |
| void JumpToJSEntry(Register target); |
| // Check if object is in new space. Jumps if the object is not in new space. |
| // The register scratch can be object itself, but scratch will be clobbered. |
| void JumpIfNotInNewSpace(Register object, Register scratch, Label* branch) { |
| InNewSpace(object, scratch, eq, branch); |
| } |
| |
| // Check if object is in new space. Jumps if the object is in new space. |
| // The register scratch can be object itself, but it will be clobbered. |
| void JumpIfInNewSpace(Register object, Register scratch, Label* branch) { |
| InNewSpace(object, scratch, ne, branch); |
| } |
| |
| // Check if an object has a given incremental marking color. |
| void HasColor(Register object, Register scratch0, Register scratch1, |
| Label* has_color, int first_bit, int second_bit); |
| |
| void JumpIfBlack(Register object, Register scratch0, Register scratch1, |
| Label* on_black); |
| |
| // Checks the color of an object. If the object is white we jump to the |
| // incremental marker. |
| void JumpIfWhite(Register value, Register scratch1, Register scratch2, |
| Register scratch3, Label* value_is_white); |
| |
| // 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 FieldMemOperand(reg, off). |
| void RecordWriteField( |
| Register object, int offset, Register value, Register scratch, |
| LinkRegisterStatus lr_status, SaveFPRegsMode save_fp, |
| RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
| SmiCheck smi_check = INLINE_SMI_CHECK); |
| |
| // For a given |object| notify the garbage collector that the slot |address| |
| // has been written. |value| is the object being stored. The value and |
| // address registers are clobbered by the operation. |
| void RecordWrite( |
| Register object, Register address, Register value, |
| LinkRegisterStatus lr_status, SaveFPRegsMode save_fp, |
| RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
| SmiCheck smi_check = INLINE_SMI_CHECK); |
| |
| // Push and pop the registers that can hold pointers, as defined by the |
| // RegList constant kSafepointSavedRegisters. |
| void PushSafepointRegisters(); |
| void PopSafepointRegisters(); |
| |
| // Loads the constant pool pointer (kConstantPoolRegister). |
| void LoadConstantPoolPointerRegisterFromCodeTargetAddress( |
| Register code_target_address); |
| |
| // Flush the I-cache from asm code. You should use CpuFeatures::FlushICache |
| // from C. |
| // Does not handle errors. |
| void FlushICache(Register address, size_t size, Register scratch); |
| |
| // Enter exit frame. |
| // stack_space - extra stack space, used for parameters before call to C. |
| // At least one slot (for the return address) should be provided. |
| void EnterExitFrame(bool save_doubles, int stack_space = 1, |
| StackFrame::Type frame_type = StackFrame::EXIT); |
| |
| // Leave the current exit frame. Expects the return value in r0. |
| // Expect the number of values, pushed prior to the exit frame, to |
| // remove in a register (or no_reg, if there is nothing to remove). |
| void LeaveExitFrame(bool save_doubles, Register argument_count, |
| bool argument_count_is_length = false); |
| |
| // Load the global proxy from the current context. |
| void LoadGlobalProxy(Register dst) { |
| LoadNativeContextSlot(Context::GLOBAL_PROXY_INDEX, dst); |
| } |
| |
| void LoadNativeContextSlot(int index, Register dst); |
| |
| // ---------------------------------------------------------------- |
| // new PPC macro-assembler interfaces that are slightly higher level |
| // than assembler-ppc and may generate variable length sequences |
| |
| // load a literal double value <value> to FPR <result> |
| void LoadWord(Register dst, const MemOperand& mem, Register scratch); |
| void StoreWord(Register src, const MemOperand& mem, Register scratch); |
| |
| void LoadHalfWord(Register dst, const MemOperand& mem, Register scratch); |
| void LoadHalfWordArith(Register dst, const MemOperand& mem, |
| Register scratch = no_reg); |
| void StoreHalfWord(Register src, const MemOperand& mem, Register scratch); |
| |
| void LoadByte(Register dst, const MemOperand& mem, Register scratch); |
| void StoreByte(Register src, const MemOperand& mem, Register scratch); |
| |
| void LoadRepresentation(Register dst, const MemOperand& mem, Representation r, |
| Register scratch = no_reg); |
| void StoreRepresentation(Register src, const MemOperand& mem, |
| Representation r, Register scratch = no_reg); |
| void LoadDoubleU(DoubleRegister dst, const MemOperand& mem, |
| Register scratch = no_reg); |
| |
| void Cmpi(Register src1, const Operand& src2, Register scratch, |
| CRegister cr = cr7); |
| void Cmplwi(Register src1, const Operand& src2, Register scratch, |
| CRegister cr = cr7); |
| void And(Register ra, Register rs, const Operand& rb, RCBit rc = LeaveRC); |
| void Or(Register ra, Register rs, const Operand& rb, RCBit rc = LeaveRC); |
| void Xor(Register ra, Register rs, const Operand& rb, RCBit rc = LeaveRC); |
| |
| void AddSmiLiteral(Register dst, Register src, Smi* smi, Register scratch); |
| void SubSmiLiteral(Register dst, Register src, Smi* smi, Register scratch); |
| void CmpSmiLiteral(Register src1, Smi* smi, Register scratch, |
| CRegister cr = cr7); |
| void CmplSmiLiteral(Register src1, Smi* smi, Register scratch, |
| CRegister cr = cr7); |
| void AndSmiLiteral(Register dst, Register src, Smi* smi, Register scratch, |
| RCBit rc = LeaveRC); |
| |
| |
| |
| // --------------------------------------------------------------------------- |
| // JavaScript invokes |
| |
| // 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_reg| do not include |
| // receiver. |callee_args_count| is not modified, |caller_args_count_reg| |
| // is trashed. |
| |
| // Invoke the JavaScript function code by either calling or jumping. |
| void InvokeFunctionCode(Register function, Register new_target, |
| const ParameterCount& expected, |
| const ParameterCount& actual, InvokeFlag flag); |
| |
| // On function call, call into the debugger if necessary. |
| void CheckDebugHook(Register fun, Register new_target, |
| const ParameterCount& expected, |
| const ParameterCount& actual); |
| |
| // 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, |
| const ParameterCount& actual, InvokeFlag flag); |
| |
| void InvokeFunction(Register function, const ParameterCount& expected, |
| const ParameterCount& actual, InvokeFlag flag); |
| |
| void InvokeFunction(Handle<JSFunction> function, |
| const ParameterCount& expected, |
| const ParameterCount& actual, InvokeFlag flag); |
| |
| void DebugBreak(); |
| // Frame restart support |
| void MaybeDropFrames(); |
| |
| // Exception handling |
| |
| // Push a new stack handler and link into stack handler chain. |
| void PushStackHandler(); |
| |
| // Unlink the stack handler on top of the stack from the stack handler chain. |
| // Must preserve the result register. |
| void PopStackHandler(); |
| |
| // --------------------------------------------------------------------------- |
| // Support functions. |
| |
| // Compare object type for heap object. heap_object contains a non-Smi |
| // whose object type should be compared with the given type. This both |
| // sets the flags and leaves the object type in the type_reg register. |
| // It leaves the map in the map register (unless the type_reg and map register |
| // are the same register). It leaves the heap object in the heap_object |
| // register unless the heap_object register is the same register as one of the |
| // other registers. |
| // Type_reg can be no_reg. In that case ip is used. |
| void CompareObjectType(Register heap_object, Register map, Register type_reg, |
| InstanceType type); |
| |
| // Compare instance type in a map. map contains a valid map object whose |
| // object type should be compared with the given type. This both |
| // sets the flags and leaves the object type in the type_reg register. |
| void CompareInstanceType(Register map, Register type_reg, InstanceType type); |
| |
| // Compare the object in a register to a value from the root list. |
| // Uses the ip register as scratch. |
| void CompareRoot(Register obj, Heap::RootListIndex index); |
| void PushRoot(Heap::RootListIndex index) { |
| LoadRoot(r0, index); |
| Push(r0); |
| } |
| |
| // Compare the object in a register to a value and jump if they are equal. |
| void JumpIfRoot(Register with, Heap::RootListIndex index, Label* if_equal) { |
| CompareRoot(with, index); |
| beq(if_equal); |
| } |
| |
| // Compare the object in a register to a value and jump if they are not equal. |
| void JumpIfNotRoot(Register with, Heap::RootListIndex index, |
| Label* if_not_equal) { |
| CompareRoot(with, index); |
| bne(if_not_equal); |
| } |
| |
| // Try to convert a double to a signed 32-bit integer. |
| // CR_EQ in cr7 is set and result assigned if the conversion is exact. |
| void TryDoubleToInt32Exact(Register result, DoubleRegister double_input, |
| Register scratch, DoubleRegister double_scratch); |
| |
| // --------------------------------------------------------------------------- |
| // Runtime calls |
| |
| static int CallSizeNotPredictableCodeSize(Address target, |
| RelocInfo::Mode rmode, |
| Condition cond = al); |
| void CallJSEntry(Register target); |
| |
| // Call a code stub. |
| void CallStub(CodeStub* stub, Condition cond = al); |
| void TailCallStub(CodeStub* stub, Condition cond = al); |
| |
| // Call a runtime routine. |
| void CallRuntime(const Runtime::Function* f, int num_arguments, |
| SaveFPRegsMode save_doubles = kDontSaveFPRegs); |
| void CallRuntimeSaveDoubles(Runtime::FunctionId fid) { |
| const Runtime::Function* function = Runtime::FunctionForId(fid); |
| CallRuntime(function, function->nargs, kSaveFPRegs); |
| } |
| |
| // 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 routine. |
| void JumpToExternalReference(const ExternalReference& builtin, |
| bool builtin_exit_frame = false); |
| |
| // --------------------------------------------------------------------------- |
| // StatsCounter support |
| |
| void IncrementCounter(StatsCounter* counter, int value, Register scratch1, |
| Register scratch2); |
| void DecrementCounter(StatsCounter* counter, int value, Register scratch1, |
| Register scratch2); |
| |
| // --------------------------------------------------------------------------- |
| // Smi utilities |
| |
| // Shift left by kSmiShift |
| void SmiTag(Register reg, RCBit rc = LeaveRC) { SmiTag(reg, reg, rc); } |
| void SmiTag(Register dst, Register src, RCBit rc = LeaveRC) { |
| ShiftLeftImm(dst, src, Operand(kSmiShift), rc); |
| } |
| |
| void SmiToPtrArrayOffset(Register dst, Register src) { |
| #if V8_TARGET_ARCH_PPC64 |
| STATIC_ASSERT(kSmiTag == 0 && kSmiShift > kPointerSizeLog2); |
| ShiftRightArithImm(dst, src, kSmiShift - kPointerSizeLog2); |
| #else |
| STATIC_ASSERT(kSmiTag == 0 && kSmiShift < kPointerSizeLog2); |
| ShiftLeftImm(dst, src, Operand(kPointerSizeLog2 - kSmiShift)); |
| #endif |
| } |
| |
| // Untag the source value into destination and jump if source is a smi. |
| // Souce and destination can be the same register. |
| void UntagAndJumpIfSmi(Register dst, Register src, Label* smi_case); |
| |
| // Jump if either of the registers contain a non-smi. |
| inline void JumpIfNotSmi(Register value, Label* not_smi_label) { |
| TestIfSmi(value, r0); |
| bne(not_smi_label, cr0); |
| } |
| // Jump if either of the registers contain a smi. |
| void JumpIfEitherSmi(Register reg1, Register reg2, Label* on_either_smi); |
| |
| // Abort execution if argument is a smi, enabled via --debug-code. |
| void AssertNotSmi(Register object); |
| void AssertSmi(Register object); |
| |
| |
| |
| #if V8_TARGET_ARCH_PPC64 |
| // Ensure it is permissible to read/write int value directly from |
| // upper half of the smi. |
| STATIC_ASSERT(kSmiTag == 0); |
| STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 32); |
| #endif |
| #if V8_TARGET_ARCH_PPC64 && V8_TARGET_LITTLE_ENDIAN |
| #define SmiWordOffset(offset) (offset + kPointerSize / 2) |
| #else |
| #define SmiWordOffset(offset) offset |
| #endif |
| |
| // Abort execution if argument is not a FixedArray, enabled via --debug-code. |
| void AssertFixedArray(Register object); |
| |
| 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, Register scratch); |
| |
| // --------------------------------------------------------------------------- |
| // Patching helpers. |
| |
| template <typename Field> |
| void DecodeField(Register dst, Register src, RCBit rc = LeaveRC) { |
| ExtractBitRange(dst, src, Field::kShift + Field::kSize - 1, Field::kShift, |
| rc); |
| } |
| |
| template <typename Field> |
| void DecodeField(Register reg, RCBit rc = LeaveRC) { |
| DecodeField<Field>(reg, reg, rc); |
| } |
| |
| private: |
| static const int kSmiShift = kSmiTagSize + kSmiShiftSize; |
| |
| // Helper functions for generating invokes. |
| void InvokePrologue(const ParameterCount& expected, |
| const ParameterCount& actual, Label* done, |
| bool* definitely_mismatches, InvokeFlag flag); |
| |
| // Helper for implementing JumpIfNotInNewSpace and JumpIfInNewSpace. |
| void InNewSpace(Register object, Register scratch, |
| Condition cond, // eq for new space, ne otherwise. |
| Label* branch); |
| |
| // Compute memory operands for safepoint stack slots. |
| static int SafepointRegisterStackIndex(int reg_code); |
| |
| // Needs access to SafepointRegisterStackIndex for compiled frame |
| // traversal. |
| friend class StandardFrame; |
| }; |
| |
| // ----------------------------------------------------------------------------- |
| // Static helper functions. |
| |
| inline MemOperand ContextMemOperand(Register context, int index = 0) { |
| return MemOperand(context, Context::SlotOffset(index)); |
| } |
| |
| |
| inline MemOperand NativeContextMemOperand() { |
| return ContextMemOperand(cp, Context::NATIVE_CONTEXT_INDEX); |
| } |
| |
| #define ACCESS_MASM(masm) masm-> |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_PPC_MACRO_ASSEMBLER_PPC_H_ |
