| // 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_ARM_MACRO_ASSEMBLER_ARM_H_ |
| #define V8_CODEGEN_ARM_MACRO_ASSEMBLER_ARM_H_ |
| |
| #include "src/codegen/arm/assembler-arm.h" |
| #include "src/codegen/bailout-reason.h" |
| #include "src/common/globals.h" |
| #include "src/objects/contexts.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // TODO(victorgomes): Move definition to macro-assembler.h, once all other |
| // platforms are updated. |
| enum class StackLimitKind { kInterruptStackLimit, kRealStackLimit }; |
| |
| // ---------------------------------------------------------------------------- |
| // 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); |
| } |
| |
| 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); |
| |
| enum TargetAddressStorageMode { |
| CAN_INLINE_TARGET_ADDRESS, |
| NEVER_INLINE_TARGET_ADDRESS |
| }; |
| |
| class V8_EXPORT_PRIVATE TurboAssembler : public TurboAssemblerBase { |
| public: |
| using TurboAssemblerBase::TurboAssemblerBase; |
| |
| // 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); |
| |
| // Allocate stack space of given size (i.e. decrement {sp} 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_OS_WIN |
| void AllocateStackSpace(Register bytes_scratch); |
| void AllocateStackSpace(int bytes); |
| #else |
| void AllocateStackSpace(Register bytes) { sub(sp, sp, bytes); } |
| void AllocateStackSpace(int bytes) { sub(sp, sp, Operand(bytes)); } |
| #endif |
| |
| // Push a fixed frame, consisting of lr, fp |
| void PushCommonFrame(Register marker_reg = no_reg); |
| |
| // Generates function and stub prologue code. |
| void StubPrologue(StackFrame::Type type); |
| void Prologue(); |
| |
| // Push a standard frame, consisting of lr, fp, context and JS function |
| void PushStandardFrame(Register function_reg); |
| |
| void InitializeRootRegister(); |
| |
| void Push(Register src) { push(src); } |
| |
| 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, Condition cond = al) { |
| if (src1.code() > src2.code()) { |
| stm(db_w, sp, src1.bit() | src2.bit(), cond); |
| } else { |
| str(src1, MemOperand(sp, 4, NegPreIndex), cond); |
| str(src2, MemOperand(sp, 4, NegPreIndex), cond); |
| } |
| } |
| |
| // Push three registers. Pushes leftmost register first (to highest address). |
| void Push(Register src1, Register src2, Register src3, Condition cond = al) { |
| if (src1.code() > src2.code()) { |
| if (src2.code() > src3.code()) { |
| stm(db_w, sp, src1.bit() | src2.bit() | src3.bit(), cond); |
| } else { |
| stm(db_w, sp, src1.bit() | src2.bit(), cond); |
| str(src3, MemOperand(sp, 4, NegPreIndex), cond); |
| } |
| } else { |
| str(src1, MemOperand(sp, 4, NegPreIndex), cond); |
| Push(src2, src3, cond); |
| } |
| } |
| |
| // Push four registers. Pushes leftmost register first (to highest address). |
| void Push(Register src1, Register src2, Register src3, Register src4, |
| Condition cond = al) { |
| if (src1.code() > src2.code()) { |
| if (src2.code() > src3.code()) { |
| if (src3.code() > src4.code()) { |
| stm(db_w, sp, src1.bit() | src2.bit() | src3.bit() | src4.bit(), |
| cond); |
| } else { |
| stm(db_w, sp, src1.bit() | src2.bit() | src3.bit(), cond); |
| str(src4, MemOperand(sp, 4, NegPreIndex), cond); |
| } |
| } else { |
| stm(db_w, sp, src1.bit() | src2.bit(), cond); |
| Push(src3, src4, cond); |
| } |
| } else { |
| str(src1, MemOperand(sp, 4, NegPreIndex), cond); |
| Push(src2, src3, src4, cond); |
| } |
| } |
| |
| // Push five registers. Pushes leftmost register first (to highest address). |
| void Push(Register src1, Register src2, Register src3, Register src4, |
| Register src5, Condition cond = al) { |
| if (src1.code() > src2.code()) { |
| if (src2.code() > src3.code()) { |
| if (src3.code() > src4.code()) { |
| if (src4.code() > src5.code()) { |
| stm(db_w, sp, |
| src1.bit() | src2.bit() | src3.bit() | src4.bit() | src5.bit(), |
| cond); |
| } else { |
| stm(db_w, sp, src1.bit() | src2.bit() | src3.bit() | src4.bit(), |
| cond); |
| str(src5, MemOperand(sp, 4, NegPreIndex), cond); |
| } |
| } else { |
| stm(db_w, sp, src1.bit() | src2.bit() | src3.bit(), cond); |
| Push(src4, src5, cond); |
| } |
| } else { |
| stm(db_w, sp, src1.bit() | src2.bit(), cond); |
| Push(src3, src4, src5, cond); |
| } |
| } else { |
| str(src1, MemOperand(sp, 4, NegPreIndex), cond); |
| Push(src2, src3, src4, src5, cond); |
| } |
| } |
| |
| 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); |
| |
| void Pop(Register dst) { pop(dst); } |
| |
| // Pop two registers. Pops rightmost register first (from lower address). |
| void Pop(Register src1, Register src2, Condition cond = al) { |
| DCHECK(src1 != src2); |
| if (src1.code() > src2.code()) { |
| ldm(ia_w, sp, src1.bit() | src2.bit(), cond); |
| } else { |
| ldr(src2, MemOperand(sp, 4, PostIndex), cond); |
| ldr(src1, MemOperand(sp, 4, PostIndex), cond); |
| } |
| } |
| |
| // Pop three registers. Pops rightmost register first (from lower address). |
| void Pop(Register src1, Register src2, Register src3, Condition cond = al) { |
| DCHECK(!AreAliased(src1, src2, src3)); |
| if (src1.code() > src2.code()) { |
| if (src2.code() > src3.code()) { |
| ldm(ia_w, sp, src1.bit() | src2.bit() | src3.bit(), cond); |
| } else { |
| ldr(src3, MemOperand(sp, 4, PostIndex), cond); |
| ldm(ia_w, sp, src1.bit() | src2.bit(), cond); |
| } |
| } else { |
| Pop(src2, src3, cond); |
| ldr(src1, MemOperand(sp, 4, PostIndex), cond); |
| } |
| } |
| |
| // Pop four registers. Pops rightmost register first (from lower address). |
| void Pop(Register src1, Register src2, Register src3, Register src4, |
| Condition cond = al) { |
| DCHECK(!AreAliased(src1, src2, src3, src4)); |
| if (src1.code() > src2.code()) { |
| if (src2.code() > src3.code()) { |
| if (src3.code() > src4.code()) { |
| ldm(ia_w, sp, src1.bit() | src2.bit() | src3.bit() | src4.bit(), |
| cond); |
| } else { |
| ldr(src4, MemOperand(sp, 4, PostIndex), cond); |
| ldm(ia_w, sp, src1.bit() | src2.bit() | src3.bit(), cond); |
| } |
| } else { |
| Pop(src3, src4, cond); |
| ldm(ia_w, sp, src1.bit() | src2.bit(), cond); |
| } |
| } else { |
| Pop(src2, src3, src4, cond); |
| ldr(src1, MemOperand(sp, 4, PostIndex), cond); |
| } |
| } |
| |
| // 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 = 0, |
| Register scratch = no_reg); |
| |
| // 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); |
| |
| // 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(DwVfpRegister src); |
| void MovToFloatParameters(DwVfpRegister src1, DwVfpRegister src2); |
| void MovToFloatResult(DwVfpRegister 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 MovFromFloatParameter(DwVfpRegister dst); |
| void MovFromFloatResult(DwVfpRegister dst); |
| |
| void Trap() override; |
| void DebugBreak() override; |
| |
| // Calls Abort(msg) if the condition cond is not satisfied. |
| // Use --debug-code to enable. |
| void Assert(Condition cond, AbortReason reason); |
| |
| // Like Assert(), but without condition. |
| // Use --debug-code to enable. |
| void AssertUnreachable(AbortReason reason); |
| |
| // Like Assert(), but always enabled. |
| void Check(Condition cond, AbortReason reason); |
| |
| // Print a message to stdout and abort execution. |
| void Abort(AbortReason msg); |
| |
| void LslPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, Register shift); |
| void LslPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, uint32_t shift); |
| void LsrPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, Register shift); |
| void LsrPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, uint32_t shift); |
| void AsrPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, Register shift); |
| void AsrPair(Register dst_low, Register dst_high, Register src_low, |
| Register src_high, uint32_t shift); |
| |
| void LoadFromConstantsTable(Register destination, |
| int constant_index) override; |
| void LoadRootRegisterOffset(Register destination, intptr_t offset) override; |
| void LoadRootRelative(Register destination, int32_t offset) override; |
| |
| // Jump, Call, and Ret pseudo instructions implementing inter-working. |
| void Call(Register target, Condition cond = al); |
| void Call(Address target, RelocInfo::Mode rmode, Condition cond = al, |
| TargetAddressStorageMode mode = CAN_INLINE_TARGET_ADDRESS, |
| bool check_constant_pool = true); |
| void Call(Handle<Code> code, RelocInfo::Mode rmode = RelocInfo::CODE_TARGET, |
| Condition cond = al, |
| TargetAddressStorageMode mode = CAN_INLINE_TARGET_ADDRESS, |
| bool check_constant_pool = true); |
| void Call(Label* target); |
| |
| // Load the builtin given by the Smi in |builtin_index| into the same |
| // register. |
| void LoadEntryFromBuiltinIndex(Register builtin_index); |
| void CallBuiltinByIndex(Register builtin_index) override; |
| void CallBuiltin(int builtin_index, Condition cond = al); |
| |
| void LoadCodeObjectEntry(Register destination, Register code_object) override; |
| void CallCodeObject(Register code_object) override; |
| void JumpCodeObject(Register code_object) override; |
| |
| // Generates an instruction sequence s.t. the return address points to the |
| // instruction following the call. |
| // The return address on the stack is used by frame iteration. |
| void StoreReturnAddressAndCall(Register target); |
| |
| void CallForDeoptimization(Builtins::Name target, int deopt_id, Label* exit, |
| DeoptimizeKind kind, |
| Label* jump_deoptimization_entry_label); |
| |
| // Emit code to discard a non-negative number of pointer-sized elements |
| // from the stack, clobbering only the sp register. |
| void Drop(int count, Condition cond = al); |
| void Drop(Register count, Condition cond = al); |
| |
| void Ret(Condition cond = al); |
| void Ret(int drop, Condition cond = al); |
| |
| // Compare single values and move the result to the normal condition flags. |
| void VFPCompareAndSetFlags(const SwVfpRegister src1, const SwVfpRegister src2, |
| const Condition cond = al); |
| void VFPCompareAndSetFlags(const SwVfpRegister src1, const float src2, |
| const Condition cond = al); |
| |
| // Compare double values and move the result to the normal condition flags. |
| void VFPCompareAndSetFlags(const DwVfpRegister src1, const DwVfpRegister src2, |
| const Condition cond = al); |
| void VFPCompareAndSetFlags(const DwVfpRegister src1, const double src2, |
| const Condition cond = al); |
| |
| // If the value is a NaN, canonicalize the value else, do nothing. |
| void VFPCanonicalizeNaN(const DwVfpRegister dst, const DwVfpRegister src, |
| const Condition cond = al); |
| void VFPCanonicalizeNaN(const DwVfpRegister value, |
| const Condition cond = al) { |
| VFPCanonicalizeNaN(value, value, cond); |
| } |
| |
| void VmovHigh(Register dst, DwVfpRegister src); |
| void VmovHigh(DwVfpRegister dst, Register src); |
| void VmovLow(Register dst, DwVfpRegister src); |
| void VmovLow(DwVfpRegister dst, Register src); |
| |
| void CheckPageFlag(Register object, int mask, Condition cc, |
| Label* condition_met); |
| |
| // Check whether d16-d31 are available on the CPU. The result is given by the |
| // Z condition flag: Z==0 if d16-d31 available, Z==1 otherwise. |
| void CheckFor32DRegs(Register scratch); |
| |
| void SaveRegisters(RegList registers); |
| void RestoreRegisters(RegList registers); |
| |
| void CallRecordWriteStub(Register object, Operand offset, |
| RememberedSetAction remembered_set_action, |
| SaveFPRegsMode fp_mode); |
| void CallRecordWriteStub(Register object, Operand offset, |
| RememberedSetAction remembered_set_action, |
| SaveFPRegsMode fp_mode, Address wasm_target); |
| void CallEphemeronKeyBarrier(Register object, Operand offset, |
| SaveFPRegsMode fp_mode); |
| |
| // For a given |object| and |offset|: |
| // - Move |object| to |dst_object|. |
| // - Compute the address of the slot pointed to by |offset| in |object| and |
| // write it to |dst_slot|. |offset| can be either an immediate or a |
| // register. |
| // This method makes sure |object| and |offset| are allowed to overlap with |
| // the destination registers. |
| void MoveObjectAndSlot(Register dst_object, Register dst_slot, |
| Register object, Operand offset); |
| |
| // Does a runtime check for 16/32 FP registers. Either way, pushes 32 double |
| // values to location, saving [d0..(d15|d31)]. |
| void SaveFPRegs(Register location, Register scratch); |
| |
| // Does a runtime check for 16/32 FP registers. Either way, pops 32 double |
| // values to location, restoring [d0..(d15|d31)]. |
| void RestoreFPRegs(Register location, Register scratch); |
| |
| // As above, but with heap semantics instead of stack semantics, i.e.: the |
| // location starts at the lowest address and grows towards higher addresses, |
| // for both saves and restores. |
| void SaveFPRegsToHeap(Register location, Register scratch); |
| void RestoreFPRegsFromHeap(Register location, Register scratch); |
| |
| // 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); |
| void Jump(Register target, Condition cond = al); |
| void Jump(Address target, RelocInfo::Mode rmode, Condition cond = al); |
| void Jump(Handle<Code> code, RelocInfo::Mode rmode, Condition cond = al); |
| void Jump(const ExternalReference& reference) override; |
| |
| // Perform a floating-point min or max operation with the |
| // (IEEE-754-compatible) semantics of ARM64's fmin/fmax. Some cases, typically |
| // NaNs or +/-0.0, are expected to be rare and are handled in out-of-line |
| // code. The specific behaviour depends on supported instructions. |
| // |
| // These functions assume (and assert) that left!=right. It is permitted |
| // for the result to alias either input register. |
| void FloatMax(SwVfpRegister result, SwVfpRegister left, SwVfpRegister right, |
| Label* out_of_line); |
| void FloatMin(SwVfpRegister result, SwVfpRegister left, SwVfpRegister right, |
| Label* out_of_line); |
| void FloatMax(DwVfpRegister result, DwVfpRegister left, DwVfpRegister right, |
| Label* out_of_line); |
| void FloatMin(DwVfpRegister result, DwVfpRegister left, DwVfpRegister right, |
| Label* out_of_line); |
| |
| // Generate out-of-line cases for the macros above. |
| void FloatMaxOutOfLine(SwVfpRegister result, SwVfpRegister left, |
| SwVfpRegister right); |
| void FloatMinOutOfLine(SwVfpRegister result, SwVfpRegister left, |
| SwVfpRegister right); |
| void FloatMaxOutOfLine(DwVfpRegister result, DwVfpRegister left, |
| DwVfpRegister right); |
| void FloatMinOutOfLine(DwVfpRegister result, DwVfpRegister left, |
| DwVfpRegister right); |
| |
| void ExtractLane(Register dst, QwNeonRegister src, NeonDataType dt, int lane); |
| void ExtractLane(Register dst, DwVfpRegister src, NeonDataType dt, int lane); |
| void ExtractLane(SwVfpRegister dst, QwNeonRegister src, int lane); |
| void ExtractLane(DwVfpRegister dst, QwNeonRegister src, int lane); |
| void ReplaceLane(QwNeonRegister dst, QwNeonRegister src, Register src_lane, |
| NeonDataType dt, int lane); |
| void ReplaceLane(QwNeonRegister dst, QwNeonRegister src, |
| SwVfpRegister src_lane, int lane); |
| void ReplaceLane(QwNeonRegister dst, QwNeonRegister src, |
| DwVfpRegister src_lane, int lane); |
| |
| // Register move. May do nothing if the registers are identical. |
| void Move(Register dst, Smi smi); |
| void Move(Register dst, Handle<HeapObject> value); |
| void Move(Register dst, ExternalReference reference); |
| void Move(Register dst, Register src, Condition cond = al); |
| void Move(Register dst, const Operand& src, SBit sbit = LeaveCC, |
| Condition cond = al) { |
| if (!src.IsRegister() || src.rm() != dst || sbit != LeaveCC) { |
| mov(dst, src, sbit, cond); |
| } |
| } |
| // Move src0 to dst0 and src1 to dst1, handling possible overlaps. |
| void MovePair(Register dst0, Register src0, Register dst1, Register src1); |
| |
| void Move(SwVfpRegister dst, SwVfpRegister src, Condition cond = al); |
| void Move(DwVfpRegister dst, DwVfpRegister src, Condition cond = al); |
| void Move(QwNeonRegister dst, QwNeonRegister src); |
| |
| // Simulate s-register moves for imaginary s32 - s63 registers. |
| void VmovExtended(Register dst, int src_code); |
| void VmovExtended(int dst_code, Register src); |
| // Move between s-registers and imaginary s-registers. |
| void VmovExtended(int dst_code, int src_code); |
| void VmovExtended(int dst_code, const MemOperand& src); |
| void VmovExtended(const MemOperand& dst, int src_code); |
| |
| // Register swap. Note that the register operands should be distinct. |
| void Swap(Register srcdst0, Register srcdst1); |
| void Swap(DwVfpRegister srcdst0, DwVfpRegister srcdst1); |
| void Swap(QwNeonRegister srcdst0, QwNeonRegister srcdst1); |
| |
| // Get the actual activation frame alignment for target environment. |
| static int ActivationFrameAlignment(); |
| |
| void Bfc(Register dst, Register src, int lsb, int width, Condition cond = al); |
| |
| void SmiUntag(Register reg, SBit s = LeaveCC) { |
| mov(reg, Operand::SmiUntag(reg), s); |
| } |
| void SmiUntag(Register dst, Register src, SBit s = LeaveCC) { |
| mov(dst, Operand::SmiUntag(src), s); |
| } |
| |
| // Load an object from the root table. |
| void LoadRoot(Register destination, RootIndex index) override { |
| LoadRoot(destination, index, al); |
| } |
| void LoadRoot(Register destination, RootIndex index, Condition cond); |
| |
| // Jump if the register contains a smi. |
| void JumpIfSmi(Register value, Label* smi_label); |
| |
| void JumpIfEqual(Register x, int32_t y, Label* dest); |
| void JumpIfLessThan(Register x, int32_t y, Label* dest); |
| |
| // 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. |
| void TryInlineTruncateDoubleToI(Register result, DwVfpRegister input, |
| Label* done); |
| |
| // Performs a truncating conversion of a floating point number as used by |
| // the JS bitwise operations. See ECMA-262 9.5: ToInt32. |
| // Exits with 'result' holding the answer. |
| void TruncateDoubleToI(Isolate* isolate, Zone* zone, Register result, |
| DwVfpRegister double_input, StubCallMode stub_mode); |
| |
| // EABI variant for double arguments in use. |
| bool use_eabi_hardfloat() { |
| #ifdef __arm__ |
| return base::OS::ArmUsingHardFloat(); |
| #elif USE_EABI_HARDFLOAT |
| return true; |
| #else |
| return false; |
| #endif |
| } |
| |
| // 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); } |
| |
| private: |
| // Compare single values and then load the fpscr flags to a register. |
| void VFPCompareAndLoadFlags(const SwVfpRegister src1, |
| const SwVfpRegister src2, |
| const Register fpscr_flags, |
| const Condition cond = al); |
| void VFPCompareAndLoadFlags(const SwVfpRegister src1, const float src2, |
| const Register fpscr_flags, |
| const Condition cond = al); |
| |
| // Compare double values and then load the fpscr flags to a register. |
| void VFPCompareAndLoadFlags(const DwVfpRegister src1, |
| const DwVfpRegister src2, |
| const Register fpscr_flags, |
| const Condition cond = al); |
| void VFPCompareAndLoadFlags(const DwVfpRegister src1, const double src2, |
| const Register fpscr_flags, |
| const Condition cond = al); |
| |
| void Jump(intptr_t target, RelocInfo::Mode rmode, Condition cond = al); |
| |
| // Implementation helpers for FloatMin and FloatMax. |
| template <typename T> |
| void FloatMaxHelper(T result, T left, T right, Label* out_of_line); |
| template <typename T> |
| void FloatMinHelper(T result, T left, T right, Label* out_of_line); |
| template <typename T> |
| void FloatMaxOutOfLineHelper(T result, T left, T right); |
| template <typename T> |
| void FloatMinOutOfLineHelper(T result, T left, T right); |
| |
| int CalculateStackPassedWords(int num_reg_arguments, |
| int num_double_arguments); |
| |
| void CallCFunctionHelper(Register function, int num_reg_arguments, |
| int num_double_arguments); |
| |
| void CallRecordWriteStub(Register object, Operand offset, |
| 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; |
| |
| void Mls(Register dst, Register src1, Register src2, Register srcA, |
| Condition cond = al); |
| void And(Register dst, Register src1, const Operand& src2, |
| Condition cond = al); |
| void Ubfx(Register dst, Register src, int lsb, int width, |
| Condition cond = al); |
| void Sbfx(Register dst, Register src, int lsb, int width, |
| Condition cond = al); |
| |
| // --------------------------------------------------------------------------- |
| // 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. |
| // 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, 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 at |offset| |
| // has been written. |value| is the object being stored. |
| void RecordWrite( |
| Register object, Operand offset, Register value, |
| LinkRegisterStatus lr_status, SaveFPRegsMode save_fp, |
| RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, |
| SmiCheck smi_check = INLINE_SMI_CHECK); |
| |
| // Enter exit frame. |
| // stack_space - extra stack space, used for alignment before call to C. |
| void EnterExitFrame(bool save_doubles, int stack_space = 0, |
| 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); |
| |
| void LoadMap(Register destination, Register object); |
| |
| // Load the global proxy from the current context. |
| void LoadGlobalProxy(Register dst); |
| |
| void LoadNativeContextSlot(int index, Register dst); |
| |
| // --------------------------------------------------------------------------- |
| // 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 InvokeFunctionWithNewTarget(Register function, Register new_target, |
| Register actual_parameter_count, |
| InvokeFlag flag); |
| |
| void InvokeFunction(Register function, Register expected_parameter_count, |
| Register actual_parameter_count, InvokeFlag flag); |
| |
| // 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 a scratch register 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. |
| // Acquires a scratch register. |
| void CompareRoot(Register obj, RootIndex index); |
| void PushRoot(RootIndex index) { |
| UseScratchRegisterScope temps(this); |
| Register scratch = temps.Acquire(); |
| LoadRoot(scratch, index); |
| Push(scratch); |
| } |
| |
| // Compare the object in a register to a value and jump if they are equal. |
| void JumpIfRoot(Register with, RootIndex index, Label* if_equal) { |
| CompareRoot(with, index); |
| b(eq, if_equal); |
| } |
| |
| // 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) { |
| CompareRoot(with, index); |
| b(ne, if_not_equal); |
| } |
| |
| // 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); |
| |
| // It assumes that the arguments are located below the stack pointer. |
| // argc is the number of arguments not including the receiver. |
| // TODO(victorgomes): Remove this function once we stick with the reversed |
| // arguments order. |
| MemOperand ReceiverOperand(Register argc) { |
| return MemOperand(sp, 0); |
| } |
| |
| // --------------------------------------------------------------------------- |
| // 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 routine. |
| void JumpToExternalReference(const ExternalReference& builtin, |
| bool builtin_exit_frame = false); |
| |
| // Generates a trampoline to jump to the off-heap instruction stream. |
| void JumpToInstructionStream(Address entry); |
| |
| // --------------------------------------------------------------------------- |
| // In-place weak references. |
| void LoadWeakValue(Register out, Register in, Label* target_if_cleared); |
| |
| // --------------------------------------------------------------------------- |
| // StatsCounter support |
| |
| void IncrementCounter(StatsCounter* counter, int value, Register scratch1, |
| Register scratch2); |
| void DecrementCounter(StatsCounter* counter, int value, Register scratch1, |
| Register scratch2); |
| |
| // --------------------------------------------------------------------------- |
| // Stack limit utilities |
| void LoadStackLimit(Register destination, StackLimitKind kind); |
| void StackOverflowCheck(Register num_args, Register scratch, |
| Label* stack_overflow); |
| |
| // --------------------------------------------------------------------------- |
| // Smi utilities |
| |
| void SmiTag(Register reg, SBit s = LeaveCC); |
| void SmiTag(Register dst, Register src, SBit s = LeaveCC); |
| |
| // Test if the register contains a smi (Z == 0 (eq) if true). |
| void SmiTst(Register value); |
| // Jump if either of the registers contain a non-smi. |
| void JumpIfNotSmi(Register value, Label* not_smi_label); |
| |
| // Abort execution if argument is a smi, enabled via --debug-code. |
| void AssertNotSmi(Register object); |
| void AssertSmi(Register 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, Register scratch); |
| |
| template <typename Field> |
| void DecodeField(Register dst, Register src) { |
| Ubfx(dst, src, Field::kShift, Field::kSize); |
| } |
| |
| template <typename Field> |
| void DecodeField(Register reg) { |
| DecodeField<Field>(reg, reg); |
| } |
| |
| private: |
| // Helper functions for generating invokes. |
| void InvokePrologue(Register expected_parameter_count, |
| Register actual_parameter_count, Label* done, |
| InvokeFlag flag); |
| |
| DISALLOW_IMPLICIT_CONSTRUCTORS(MacroAssembler); |
| }; |
| |
| #define ACCESS_MASM(masm) masm-> |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_CODEGEN_ARM_MACRO_ASSEMBLER_ARM_H_ |
