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Diffstat (limited to 'src/3rdparty/v8/src/mips/macro-assembler-mips.h')
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1 files changed, 0 insertions, 1583 deletions
diff --git a/src/3rdparty/v8/src/mips/macro-assembler-mips.h b/src/3rdparty/v8/src/mips/macro-assembler-mips.h deleted file mode 100644 index 11ebc86..0000000 --- a/src/3rdparty/v8/src/mips/macro-assembler-mips.h +++ /dev/null @@ -1,1583 +0,0 @@ -// Copyright 2012 the V8 project authors. All rights reserved. -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following -// disclaimer in the documentation and/or other materials provided -// with the distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived -// from this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -#ifndef V8_MIPS_MACRO_ASSEMBLER_MIPS_H_ -#define V8_MIPS_MACRO_ASSEMBLER_MIPS_H_ - -#include "assembler.h" -#include "mips/assembler-mips.h" -#include "v8globals.h" - -namespace v8 { -namespace internal { - -// Forward declaration. -class JumpTarget; - -// Reserved Register Usage Summary. -// -// Registers t8, t9, and at are reserved for use by the MacroAssembler. -// -// The programmer should know that the MacroAssembler may clobber these three, -// but won't touch other registers except in special cases. -// -// Per the MIPS ABI, register t9 must be used for indirect function call -// via 'jalr t9' or 'jr t9' instructions. This is relied upon by gcc when -// trying to update gp register for position-independent-code. Whenever -// MIPS generated code calls C code, it must be via t9 register. - - -// Flags used for the AllocateInNewSpace functions. -enum AllocationFlags { - // No special flags. - NO_ALLOCATION_FLAGS = 0, - // Return the pointer to the allocated already tagged as a heap object. - TAG_OBJECT = 1 << 0, - // The content of the result register already contains the allocation top in - // new space. - RESULT_CONTAINS_TOP = 1 << 1, - // Specify that the requested size of the space to allocate is specified in - // words instead of bytes. - SIZE_IN_WORDS = 1 << 2 -}; - -// Flags used for AllocateHeapNumber -enum TaggingMode { - // Tag the result. - TAG_RESULT, - // Don't tag - DONT_TAG_RESULT -}; - -// Flags used for the ObjectToDoubleFPURegister function. -enum ObjectToDoubleFlags { - // No special flags. - NO_OBJECT_TO_DOUBLE_FLAGS = 0, - // Object is known to be a non smi. - OBJECT_NOT_SMI = 1 << 0, - // Don't load NaNs or infinities, branch to the non number case instead. - AVOID_NANS_AND_INFINITIES = 1 << 1 -}; - -// Allow programmer to use Branch Delay Slot of Branches, Jumps, Calls. -enum BranchDelaySlot { - USE_DELAY_SLOT, - PROTECT -}; - -// Flags used for the li macro-assembler function. -enum LiFlags { - // If the constant value can be represented in just 16 bits, then - // optimize the li to use a single instruction, rather than lui/ori pair. - OPTIMIZE_SIZE = 0, - // Always use 2 instructions (lui/ori pair), even if the constant could - // be loaded with just one, so that this value is patchable later. - CONSTANT_SIZE = 1 -}; - - -enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET }; -enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK }; -enum RAStatus { kRAHasNotBeenSaved, kRAHasBeenSaved }; - -bool AreAliased(Register r1, Register r2, Register r3, Register r4); - - -// ----------------------------------------------------------------------------- -// Static helper functions. - -inline MemOperand ContextOperand(Register context, int index) { - return MemOperand(context, Context::SlotOffset(index)); -} - - -inline MemOperand GlobalObjectOperand() { - return ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX); -} - - -static inline MemOperand QmlGlobalObjectOperand() { - return ContextOperand(cp, Context::QML_GLOBAL_OBJECT_INDEX); -} - - -// Generate a MemOperand for loading a field from an object. -inline MemOperand FieldMemOperand(Register object, int offset) { - return MemOperand(object, offset - kHeapObjectTag); -} - - -// Generate a MemOperand for storing arguments 5..N on the stack -// when calling CallCFunction(). -inline MemOperand CFunctionArgumentOperand(int index) { - ASSERT(index > kCArgSlotCount); - // Argument 5 takes the slot just past the four Arg-slots. - int offset = (index - 5) * kPointerSize + kCArgsSlotsSize; - return MemOperand(sp, offset); -} - - -// MacroAssembler implements a collection of frequently used macros. -class MacroAssembler: public Assembler { - public: - // The isolate parameter can be NULL if the macro assembler should - // not use isolate-dependent functionality. In this case, it's the - // responsibility of the caller to never invoke such function on the - // macro assembler. - MacroAssembler(Isolate* isolate, void* buffer, int size); - - // Arguments macros. -#define COND_TYPED_ARGS Condition cond, Register r1, const Operand& r2 -#define COND_ARGS cond, r1, r2 - - // Cases when relocation is not needed. -#define DECLARE_NORELOC_PROTOTYPE(Name, target_type) \ - void Name(target_type target, BranchDelaySlot bd = PROTECT); \ - inline void Name(BranchDelaySlot bd, target_type target) { \ - Name(target, bd); \ - } \ - void Name(target_type target, \ - COND_TYPED_ARGS, \ - BranchDelaySlot bd = PROTECT); \ - inline void Name(BranchDelaySlot bd, \ - target_type target, \ - COND_TYPED_ARGS) { \ - Name(target, COND_ARGS, bd); \ - } - -#define DECLARE_BRANCH_PROTOTYPES(Name) \ - DECLARE_NORELOC_PROTOTYPE(Name, Label*) \ - DECLARE_NORELOC_PROTOTYPE(Name, int16_t) - - DECLARE_BRANCH_PROTOTYPES(Branch) - DECLARE_BRANCH_PROTOTYPES(BranchAndLink) - -#undef DECLARE_BRANCH_PROTOTYPES -#undef COND_TYPED_ARGS -#undef COND_ARGS - - - // Jump, Call, and Ret pseudo instructions implementing inter-working. -#define COND_ARGS Condition cond = al, Register rs = zero_reg, \ - const Operand& rt = Operand(zero_reg), BranchDelaySlot bd = PROTECT - - void Jump(Register target, COND_ARGS); - void Jump(intptr_t target, RelocInfo::Mode rmode, COND_ARGS); - void Jump(Address target, RelocInfo::Mode rmode, COND_ARGS); - void Jump(Handle<Code> code, RelocInfo::Mode rmode, COND_ARGS); - static int CallSize(Register target, COND_ARGS); - void Call(Register target, COND_ARGS); - static int CallSize(Address target, RelocInfo::Mode rmode, COND_ARGS); - void Call(Address target, RelocInfo::Mode rmode, COND_ARGS); - static int CallSize(Handle<Code> code, - RelocInfo::Mode rmode = RelocInfo::CODE_TARGET, - TypeFeedbackId ast_id = TypeFeedbackId::None(), - COND_ARGS); - void Call(Handle<Code> code, - RelocInfo::Mode rmode = RelocInfo::CODE_TARGET, - TypeFeedbackId ast_id = TypeFeedbackId::None(), - COND_ARGS); - void Ret(COND_ARGS); - inline void Ret(BranchDelaySlot bd, Condition cond = al, - Register rs = zero_reg, const Operand& rt = Operand(zero_reg)) { - Ret(cond, rs, rt, bd); - } - - void Branch(Label* L, - Condition cond, - Register rs, - Heap::RootListIndex index, - BranchDelaySlot bdslot = PROTECT); - -#undef COND_ARGS - - // 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 = cc_always, - Register reg = no_reg, - const Operand& op = Operand(no_reg)); - - // Trivial case of DropAndRet that utilizes the delay slot and only emits - // 2 instructions. - void DropAndRet(int drop); - - void DropAndRet(int drop, - Condition cond, - Register reg, - const Operand& op); - - // Swap two registers. If the scratch register is omitted then a slightly - // less efficient form using xor instead of mov is emitted. - void Swap(Register reg1, Register reg2, Register scratch = no_reg); - - void Call(Label* target); - - inline void Move(Register dst, Register src) { - if (!dst.is(src)) { - mov(dst, src); - } - } - - inline void Move(FPURegister dst, FPURegister src) { - if (!dst.is(src)) { - mov_d(dst, src); - } - } - - inline void Move(Register dst_low, Register dst_high, FPURegister src) { - mfc1(dst_low, src); - mfc1(dst_high, FPURegister::from_code(src.code() + 1)); - } - - inline void Move(FPURegister dst, Register src_low, Register src_high) { - mtc1(src_low, dst); - mtc1(src_high, FPURegister::from_code(dst.code() + 1)); - } - - // Conditional move. - void Move(FPURegister dst, double imm); - void Movz(Register rd, Register rs, Register rt); - void Movn(Register rd, Register rs, Register rt); - void Movt(Register rd, Register rs, uint16_t cc = 0); - void Movf(Register rd, Register rs, uint16_t cc = 0); - - void Clz(Register rd, Register rs); - - // Jump unconditionally to given label. - // We NEED a nop in the branch delay slot, as it used by v8, for example in - // CodeGenerator::ProcessDeferred(). - // Currently the branch delay slot is filled by the MacroAssembler. - // Use rather b(Label) for code generation. - void jmp(Label* L) { - Branch(L); - } - - // Load an object from the root table. - void LoadRoot(Register destination, - Heap::RootListIndex index); - void LoadRoot(Register destination, - Heap::RootListIndex index, - Condition cond, Register src1, const Operand& src2); - - // Store an object to the root table. - void StoreRoot(Register source, - Heap::RootListIndex index); - void StoreRoot(Register source, - Heap::RootListIndex index, - Condition cond, Register src1, const Operand& src2); - - void LoadHeapObject(Register dst, Handle<HeapObject> object); - - void LoadObject(Register result, Handle<Object> object) { - if (object->IsHeapObject()) { - LoadHeapObject(result, Handle<HeapObject>::cast(object)); - } else { - li(result, object); - } - } - - // --------------------------------------------------------------------------- - // GC Support - - void IncrementalMarkingRecordWriteHelper(Register object, - Register value, - Register address); - - enum RememberedSetFinalAction { - kReturnAtEnd, - kFallThroughAtEnd - }; - - - // 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, - RememberedSetFinalAction and_then); - - void CheckPageFlag(Register object, - Register scratch, - int mask, - Condition cc, - Label* condition_met); - - // Check if object is in new space. Jumps if the object is not in new space. - // The register scratch can be object itself, but it will be clobbered. - void JumpIfNotInNewSpace(Register object, - Register scratch, - Label* branch) { - InNewSpace(object, scratch, ne, branch); - } - - // Check if object is in new space. Jumps if the object is in new space. - // The register scratch can be object itself, but scratch will be clobbered. - void JumpIfInNewSpace(Register object, - Register scratch, - Label* branch) { - InNewSpace(object, scratch, eq, 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 already grey or black - // then we just fall through, since it is already live. If it is white and - // we can determine that it doesn't need to be scanned, then we just mark it - // black and fall through. For the rest we jump to the label so the - // incremental marker can fix its assumptions. - void EnsureNotWhite(Register object, - Register scratch1, - Register scratch2, - Register scratch3, - Label* object_is_white_and_not_data); - - // Detects conservatively whether an object is data-only, i.e. it does need to - // be scanned by the garbage collector. - void JumpIfDataObject(Register value, - Register scratch, - Label* not_data_object); - - // 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, - RAStatus ra_status, - SaveFPRegsMode save_fp, - RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, - SmiCheck smi_check = INLINE_SMI_CHECK); - - // As above, but the offset has the tag presubtracted. For use with - // MemOperand(reg, off). - inline void RecordWriteContextSlot( - Register context, - int offset, - Register value, - Register scratch, - RAStatus ra_status, - SaveFPRegsMode save_fp, - RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, - SmiCheck smi_check = INLINE_SMI_CHECK) { - RecordWriteField(context, - offset + kHeapObjectTag, - value, - scratch, - ra_status, - save_fp, - remembered_set_action, - 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, - RAStatus ra_status, - SaveFPRegsMode save_fp, - RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET, - SmiCheck smi_check = INLINE_SMI_CHECK); - - - // --------------------------------------------------------------------------- - // Inline caching support. - - // Generate code for checking access rights - used for security checks - // on access to global objects across environments. The holder register - // is left untouched, whereas both scratch registers are clobbered. - void CheckAccessGlobalProxy(Register holder_reg, - Register scratch, - Label* miss); - - void GetNumberHash(Register reg0, Register scratch); - - void LoadFromNumberDictionary(Label* miss, - Register elements, - Register key, - Register result, - Register reg0, - Register reg1, - Register reg2); - - - inline void MarkCode(NopMarkerTypes type) { - nop(type); - } - - // Check if the given instruction is a 'type' marker. - // i.e. check if it is a sll zero_reg, zero_reg, <type> (referenced as - // nop(type)). These instructions are generated to mark special location in - // the code, like some special IC code. - static inline bool IsMarkedCode(Instr instr, int type) { - ASSERT((FIRST_IC_MARKER <= type) && (type < LAST_CODE_MARKER)); - return IsNop(instr, type); - } - - - static inline int GetCodeMarker(Instr instr) { - uint32_t opcode = ((instr & kOpcodeMask)); - uint32_t rt = ((instr & kRtFieldMask) >> kRtShift); - uint32_t rs = ((instr & kRsFieldMask) >> kRsShift); - uint32_t sa = ((instr & kSaFieldMask) >> kSaShift); - - // Return <n> if we have a sll zero_reg, zero_reg, n - // else return -1. - bool sllzz = (opcode == SLL && - rt == static_cast<uint32_t>(ToNumber(zero_reg)) && - rs == static_cast<uint32_t>(ToNumber(zero_reg))); - int type = - (sllzz && FIRST_IC_MARKER <= sa && sa < LAST_CODE_MARKER) ? sa : -1; - ASSERT((type == -1) || - ((FIRST_IC_MARKER <= type) && (type < LAST_CODE_MARKER))); - return type; - } - - - - // --------------------------------------------------------------------------- - // Allocation support. - - // Allocate an object in new space. The object_size is specified - // either in bytes or in words if the allocation flag SIZE_IN_WORDS - // is passed. If the new space is exhausted control continues at the - // gc_required label. The allocated object is returned in result. If - // the flag tag_allocated_object is true the result is tagged as as - // a heap object. All registers are clobbered also when control - // continues at the gc_required label. - void AllocateInNewSpace(int object_size, - Register result, - Register scratch1, - Register scratch2, - Label* gc_required, - AllocationFlags flags); - void AllocateInNewSpace(Register object_size, - Register result, - Register scratch1, - Register scratch2, - Label* gc_required, - AllocationFlags flags); - - // Undo allocation in new space. The object passed and objects allocated after - // it will no longer be allocated. The caller must make sure that no pointers - // are left to the object(s) no longer allocated as they would be invalid when - // allocation is undone. - void UndoAllocationInNewSpace(Register object, Register scratch); - - - void AllocateTwoByteString(Register result, - Register length, - Register scratch1, - Register scratch2, - Register scratch3, - Label* gc_required); - void AllocateAsciiString(Register result, - Register length, - Register scratch1, - Register scratch2, - Register scratch3, - Label* gc_required); - void AllocateTwoByteConsString(Register result, - Register length, - Register scratch1, - Register scratch2, - Label* gc_required); - void AllocateAsciiConsString(Register result, - Register length, - Register scratch1, - Register scratch2, - Label* gc_required); - void AllocateTwoByteSlicedString(Register result, - Register length, - Register scratch1, - Register scratch2, - Label* gc_required); - void AllocateAsciiSlicedString(Register result, - Register length, - Register scratch1, - Register scratch2, - Label* gc_required); - - // Allocates a heap number or jumps to the gc_required label if the young - // space is full and a scavenge is needed. All registers are clobbered also - // when control continues at the gc_required label. - void AllocateHeapNumber(Register result, - Register scratch1, - Register scratch2, - Register heap_number_map, - Label* gc_required, - TaggingMode tagging_mode = TAG_RESULT); - void AllocateHeapNumberWithValue(Register result, - FPURegister value, - Register scratch1, - Register scratch2, - Label* gc_required); - - // --------------------------------------------------------------------------- - // Instruction macros. - -#define DEFINE_INSTRUCTION(instr) \ - void instr(Register rd, Register rs, const Operand& rt); \ - void instr(Register rd, Register rs, Register rt) { \ - instr(rd, rs, Operand(rt)); \ - } \ - void instr(Register rs, Register rt, int32_t j) { \ - instr(rs, rt, Operand(j)); \ - } - -#define DEFINE_INSTRUCTION2(instr) \ - void instr(Register rs, const Operand& rt); \ - void instr(Register rs, Register rt) { \ - instr(rs, Operand(rt)); \ - } \ - void instr(Register rs, int32_t j) { \ - instr(rs, Operand(j)); \ - } - - DEFINE_INSTRUCTION(Addu); - DEFINE_INSTRUCTION(Subu); - DEFINE_INSTRUCTION(Mul); - DEFINE_INSTRUCTION2(Mult); - DEFINE_INSTRUCTION2(Multu); - DEFINE_INSTRUCTION2(Div); - DEFINE_INSTRUCTION2(Divu); - - DEFINE_INSTRUCTION(And); - DEFINE_INSTRUCTION(Or); - DEFINE_INSTRUCTION(Xor); - DEFINE_INSTRUCTION(Nor); - DEFINE_INSTRUCTION2(Neg); - - DEFINE_INSTRUCTION(Slt); - DEFINE_INSTRUCTION(Sltu); - - // MIPS32 R2 instruction macro. - DEFINE_INSTRUCTION(Ror); - -#undef DEFINE_INSTRUCTION -#undef DEFINE_INSTRUCTION2 - - - // --------------------------------------------------------------------------- - // Pseudo-instructions. - - void mov(Register rd, Register rt) { or_(rd, rt, zero_reg); } - - // Load int32 in the rd register. - void li(Register rd, Operand j, LiFlags mode = OPTIMIZE_SIZE); - inline void li(Register rd, int32_t j, LiFlags mode = OPTIMIZE_SIZE) { - li(rd, Operand(j), mode); - } - inline void li(Register dst, Handle<Object> value, - LiFlags mode = OPTIMIZE_SIZE) { - li(dst, Operand(value), mode); - } - - // Push multiple registers on the stack. - // Registers are saved in numerical order, with higher numbered registers - // saved in higher memory addresses. - void MultiPush(RegList regs); - void MultiPushReversed(RegList regs); - - void MultiPushFPU(RegList regs); - void MultiPushReversedFPU(RegList regs); - - // Lower case push() for compatibility with arch-independent code. - void push(Register src) { - Addu(sp, sp, Operand(-kPointerSize)); - sw(src, MemOperand(sp, 0)); - } - - // Push a handle. - void Push(Handle<Object> handle); - void Push(Smi* smi) { Push(Handle<Smi>(smi, isolate())); } - - // Push two registers. Pushes leftmost register first (to highest address). - void Push(Register src1, Register src2) { - Subu(sp, sp, Operand(2 * kPointerSize)); - sw(src1, MemOperand(sp, 1 * kPointerSize)); - sw(src2, MemOperand(sp, 0 * kPointerSize)); - } - - // Push three registers. Pushes leftmost register first (to highest address). - void Push(Register src1, Register src2, Register src3) { - Subu(sp, sp, Operand(3 * kPointerSize)); - sw(src1, MemOperand(sp, 2 * kPointerSize)); - sw(src2, MemOperand(sp, 1 * kPointerSize)); - sw(src3, MemOperand(sp, 0 * kPointerSize)); - } - - // Push four registers. Pushes leftmost register first (to highest address). - void Push(Register src1, Register src2, Register src3, Register src4) { - Subu(sp, sp, Operand(4 * kPointerSize)); - sw(src1, MemOperand(sp, 3 * kPointerSize)); - sw(src2, MemOperand(sp, 2 * kPointerSize)); - sw(src3, MemOperand(sp, 1 * kPointerSize)); - sw(src4, MemOperand(sp, 0 * kPointerSize)); - } - - void Push(Register src, Condition cond, Register tst1, Register tst2) { - // Since we don't have conditional execution we use a Branch. - Branch(3, cond, tst1, Operand(tst2)); - Subu(sp, sp, Operand(kPointerSize)); - sw(src, MemOperand(sp, 0)); - } - - // Pops multiple values from the stack and load them in the - // registers specified in regs. Pop order is the opposite as in MultiPush. - void MultiPop(RegList regs); - void MultiPopReversed(RegList regs); - - void MultiPopFPU(RegList regs); - void MultiPopReversedFPU(RegList regs); - - // Lower case pop() for compatibility with arch-independent code. - void pop(Register dst) { - lw(dst, MemOperand(sp, 0)); - Addu(sp, sp, Operand(kPointerSize)); - } - - // Pop two registers. Pops rightmost register first (from lower address). - void Pop(Register src1, Register src2) { - ASSERT(!src1.is(src2)); - lw(src2, MemOperand(sp, 0 * kPointerSize)); - lw(src1, MemOperand(sp, 1 * kPointerSize)); - Addu(sp, sp, 2 * kPointerSize); - } - - // Pop three registers. Pops rightmost register first (from lower address). - void Pop(Register src1, Register src2, Register src3) { - lw(src3, MemOperand(sp, 0 * kPointerSize)); - lw(src2, MemOperand(sp, 1 * kPointerSize)); - lw(src1, MemOperand(sp, 2 * kPointerSize)); - Addu(sp, sp, 3 * kPointerSize); - } - - void Pop(uint32_t count = 1) { - Addu(sp, sp, Operand(count * kPointerSize)); - } - - // Push and pop the registers that can hold pointers, as defined by the - // RegList constant kSafepointSavedRegisters. - void PushSafepointRegisters(); - void PopSafepointRegisters(); - void PushSafepointRegistersAndDoubles(); - void PopSafepointRegistersAndDoubles(); - // Store value in register src in the safepoint stack slot for - // register dst. - void StoreToSafepointRegisterSlot(Register src, Register dst); - void StoreToSafepointRegistersAndDoublesSlot(Register src, Register dst); - // Load the value of the src register from its safepoint stack slot - // into register dst. - void LoadFromSafepointRegisterSlot(Register dst, Register src); - - // Flush the I-cache from asm code. You should use CPU::FlushICache from C. - // Does not handle errors. - void FlushICache(Register address, unsigned instructions); - - // MIPS32 R2 instruction macro. - void Ins(Register rt, Register rs, uint16_t pos, uint16_t size); - void Ext(Register rt, Register rs, uint16_t pos, uint16_t size); - - // --------------------------------------------------------------------------- - // FPU macros. These do not handle special cases like NaN or +- inf. - - // Convert unsigned word to double. - void Cvt_d_uw(FPURegister fd, FPURegister fs, FPURegister scratch); - void Cvt_d_uw(FPURegister fd, Register rs, FPURegister scratch); - - // Convert double to unsigned word. - void Trunc_uw_d(FPURegister fd, FPURegister fs, FPURegister scratch); - void Trunc_uw_d(FPURegister fd, Register rs, FPURegister scratch); - - void Trunc_w_d(FPURegister fd, FPURegister fs); - void Round_w_d(FPURegister fd, FPURegister fs); - void Floor_w_d(FPURegister fd, FPURegister fs); - void Ceil_w_d(FPURegister fd, FPURegister fs); - // Wrapper function for the different cmp/branch types. - void BranchF(Label* target, - Label* nan, - Condition cc, - FPURegister cmp1, - FPURegister cmp2, - BranchDelaySlot bd = PROTECT); - - // Alternate (inline) version for better readability with USE_DELAY_SLOT. - inline void BranchF(BranchDelaySlot bd, - Label* target, - Label* nan, - Condition cc, - FPURegister cmp1, - FPURegister cmp2) { - BranchF(target, nan, cc, cmp1, cmp2, bd); - }; - - // Convert the HeapNumber pointed to by source to a 32bits signed integer - // dest. If the HeapNumber does not fit into a 32bits signed integer branch - // to not_int32 label. If FPU is available double_scratch is used but not - // scratch2. - void ConvertToInt32(Register source, - Register dest, - Register scratch, - Register scratch2, - FPURegister double_scratch, - Label *not_int32); - - // Truncates a double using a specific rounding mode, and writes the value - // to the result register. - // The except_flag will contain any exceptions caused by the instruction. - // If check_inexact is kDontCheckForInexactConversion, then the inexact - // exception is masked. - void EmitFPUTruncate(FPURoundingMode rounding_mode, - Register result, - DoubleRegister double_input, - Register scratch, - DoubleRegister double_scratch, - Register except_flag, - CheckForInexactConversion check_inexact - = kDontCheckForInexactConversion); - - // Helper for EmitECMATruncate. - // This will truncate a floating-point value outside of the singed 32bit - // integer range to a 32bit signed integer. - // Expects the double value loaded in input_high and input_low. - // Exits with the answer in 'result'. - // Note that this code does not work for values in the 32bit range! - void EmitOutOfInt32RangeTruncate(Register result, - Register input_high, - Register input_low, - Register scratch); - - // 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 and all other registers clobbered. - void EmitECMATruncate(Register result, - FPURegister double_input, - FPURegister single_scratch, - Register scratch, - Register scratch2, - Register scratch3); - - // Enter exit frame. - // argc - argument count to be dropped by LeaveExitFrame. - // save_doubles - saves FPU registers on stack, currently disabled. - // stack_space - extra stack space. - void EnterExitFrame(bool save_doubles, - int stack_space = 0); - - // Leave the current exit frame. - void LeaveExitFrame(bool save_doubles, - Register arg_count, - bool do_return = false); - - // Get the actual activation frame alignment for target environment. - static int ActivationFrameAlignment(); - - // Make sure the stack is aligned. Only emits code in debug mode. - void AssertStackIsAligned(); - - void LoadContext(Register dst, int context_chain_length); - - // Conditionally load the cached Array transitioned map of type - // transitioned_kind from the native context if the map in register - // map_in_out is the cached Array map in the native context of - // expected_kind. - void LoadTransitionedArrayMapConditional( - ElementsKind expected_kind, - ElementsKind transitioned_kind, - Register map_in_out, - Register scratch, - Label* no_map_match); - - // Load the initial map for new Arrays from a JSFunction. - void LoadInitialArrayMap(Register function_in, - Register scratch, - Register map_out, - bool can_have_holes); - - void LoadGlobalFunction(int index, Register function); - void LoadArrayFunction(Register function); - - // Load the initial map from the global function. The registers - // function and map can be the same, function is then overwritten. - void LoadGlobalFunctionInitialMap(Register function, - Register map, - Register scratch); - - void InitializeRootRegister() { - ExternalReference roots_array_start = - ExternalReference::roots_array_start(isolate()); - li(kRootRegister, Operand(roots_array_start)); - } - - // ------------------------------------------------------------------------- - // JavaScript invokes. - - // Set up call kind marking in t1. The method takes t1 as an - // explicit first parameter to make the code more readable at the - // call sites. - void SetCallKind(Register dst, CallKind kind); - - // Invoke the JavaScript function code by either calling or jumping. - void InvokeCode(Register code, - const ParameterCount& expected, - const ParameterCount& actual, - InvokeFlag flag, - const CallWrapper& call_wrapper, - CallKind call_kind); - - void InvokeCode(Handle<Code> code, - const ParameterCount& expected, - const ParameterCount& actual, - RelocInfo::Mode rmode, - InvokeFlag flag, - CallKind call_kind); - - // Invoke the JavaScript function in the given register. Changes the - // current context to the context in the function before invoking. - void InvokeFunction(Register function, - const ParameterCount& actual, - InvokeFlag flag, - const CallWrapper& call_wrapper, - CallKind call_kind); - - void InvokeFunction(Handle<JSFunction> function, - const ParameterCount& actual, - InvokeFlag flag, - const CallWrapper& call_wrapper, - CallKind call_kind); - - - void IsObjectJSObjectType(Register heap_object, - Register map, - Register scratch, - Label* fail); - - void IsInstanceJSObjectType(Register map, - Register scratch, - Label* fail); - - void IsObjectJSStringType(Register object, - Register scratch, - Label* fail); - -#ifdef ENABLE_DEBUGGER_SUPPORT - // ------------------------------------------------------------------------- - // Debugger Support. - - void DebugBreak(); -#endif - - - // ------------------------------------------------------------------------- - // Exception handling. - - // Push a new try handler and link into try handler chain. - void PushTryHandler(StackHandler::Kind kind, int handler_index); - - // Unlink the stack handler on top of the stack from the try handler chain. - // Must preserve the result register. - void PopTryHandler(); - - // Passes thrown value to the handler of top of the try handler chain. - void Throw(Register value); - - // Propagates an uncatchable exception to the top of the current JS stack's - // handler chain. - void ThrowUncatchable(Register value); - - // Copies a fixed number of fields of heap objects from src to dst. - void CopyFields(Register dst, Register src, RegList temps, int field_count); - - // Copies a number of bytes from src to dst. All registers are clobbered. On - // exit src and dst will point to the place just after where the last byte was - // read or written and length will be zero. - void CopyBytes(Register src, - Register dst, - Register length, - Register scratch); - - // Initialize fields with filler values. Fields starting at |start_offset| - // not including end_offset are overwritten with the value in |filler|. At - // the end the loop, |start_offset| takes the value of |end_offset|. - void InitializeFieldsWithFiller(Register start_offset, - Register end_offset, - Register filler); - - // ------------------------------------------------------------------------- - // Support functions. - - // Try to get function prototype of a function and puts the value in - // the result register. Checks that the function really is a - // function and jumps to the miss label if the fast checks fail. The - // function register will be untouched; the other registers may be - // clobbered. - void TryGetFunctionPrototype(Register function, - Register result, - Register scratch, - Label* miss, - bool miss_on_bound_function = false); - - void GetObjectType(Register function, - Register map, - Register type_reg); - - // Check if a map for a JSObject indicates that the object has fast elements. - // Jump to the specified label if it does not. - void CheckFastElements(Register map, - Register scratch, - Label* fail); - - // Check if a map for a JSObject indicates that the object can have both smi - // and HeapObject elements. Jump to the specified label if it does not. - void CheckFastObjectElements(Register map, - Register scratch, - Label* fail); - - // Check if a map for a JSObject indicates that the object has fast smi only - // elements. Jump to the specified label if it does not. - void CheckFastSmiElements(Register map, - Register scratch, - Label* fail); - - // Check to see if maybe_number can be stored as a double in - // FastDoubleElements. If it can, store it at the index specified by key in - // the FastDoubleElements array elements. Otherwise jump to fail, in which - // case scratch2, scratch3 and scratch4 are unmodified. - void StoreNumberToDoubleElements(Register value_reg, - Register key_reg, - // All regs below here overwritten. - Register elements_reg, - Register scratch1, - Register scratch2, - Register scratch3, - Register scratch4, - Label* fail, - int elements_offset = 0); - - // Compare an object's map with the specified map and its transitioned - // elements maps if mode is ALLOW_ELEMENT_TRANSITION_MAPS. Jumps to - // "branch_to" if the result of the comparison is "cond". If multiple map - // compares are required, the compare sequences branches to early_success. - void CompareMapAndBranch(Register obj, - Register scratch, - Handle<Map> map, - Label* early_success, - Condition cond, - Label* branch_to, - CompareMapMode mode = REQUIRE_EXACT_MAP); - - // As above, but the map of the object is already loaded into the register - // which is preserved by the code generated. - void CompareMapAndBranch(Register obj_map, - Handle<Map> map, - Label* early_success, - Condition cond, - Label* branch_to, - CompareMapMode mode = REQUIRE_EXACT_MAP); - - // Check if the map of an object is equal to a specified map and branch to - // label if not. Skip the smi check if not required (object is known to be a - // heap object). If mode is ALLOW_ELEMENT_TRANSITION_MAPS, then also match - // against maps that are ElementsKind transition maps of the specificed map. - void CheckMap(Register obj, - Register scratch, - Handle<Map> map, - Label* fail, - SmiCheckType smi_check_type, - CompareMapMode mode = REQUIRE_EXACT_MAP); - - - void CheckMap(Register obj, - Register scratch, - Heap::RootListIndex index, - Label* fail, - SmiCheckType smi_check_type); - - // Check if the map of an object is equal to a specified map and branch to a - // specified target if equal. Skip the smi check if not required (object is - // known to be a heap object) - void DispatchMap(Register obj, - Register scratch, - Handle<Map> map, - Handle<Code> success, - SmiCheckType smi_check_type); - - // Generates code for reporting that an illegal operation has - // occurred. - void IllegalOperation(int num_arguments); - - - // Load and check the instance type of an object for being a string. - // Loads the type into the second argument register. - // Returns a condition that will be enabled if the object was a string. - Condition IsObjectStringType(Register obj, - Register type, - Register result) { - lw(type, FieldMemOperand(obj, HeapObject::kMapOffset)); - lbu(type, FieldMemOperand(type, Map::kInstanceTypeOffset)); - And(type, type, Operand(kIsNotStringMask)); - ASSERT_EQ(0, kStringTag); - return eq; - } - - - // Picks out an array index from the hash field. - // Register use: - // hash - holds the index's hash. Clobbered. - // index - holds the overwritten index on exit. - void IndexFromHash(Register hash, Register index); - - // Get the number of least significant bits from a register. - void GetLeastBitsFromSmi(Register dst, Register src, int num_least_bits); - void GetLeastBitsFromInt32(Register dst, Register src, int mun_least_bits); - - // Load the value of a number object into a FPU double register. If the - // object is not a number a jump to the label not_number is performed - // and the FPU double register is unchanged. - void ObjectToDoubleFPURegister( - Register object, - FPURegister value, - Register scratch1, - Register scratch2, - Register heap_number_map, - Label* not_number, - ObjectToDoubleFlags flags = NO_OBJECT_TO_DOUBLE_FLAGS); - - // Load the value of a smi object into a FPU double register. The register - // scratch1 can be the same register as smi in which case smi will hold the - // untagged value afterwards. - void SmiToDoubleFPURegister(Register smi, - FPURegister value, - Register scratch1); - - // ------------------------------------------------------------------------- - // Overflow handling functions. - // Usage: first call the appropriate arithmetic function, then call one of the - // jump functions with the overflow_dst register as the second parameter. - - void AdduAndCheckForOverflow(Register dst, - Register left, - Register right, - Register overflow_dst, - Register scratch = at); - - void SubuAndCheckForOverflow(Register dst, - Register left, - Register right, - Register overflow_dst, - Register scratch = at); - - void BranchOnOverflow(Label* label, - Register overflow_check, - BranchDelaySlot bd = PROTECT) { - Branch(label, lt, overflow_check, Operand(zero_reg), bd); - } - - void BranchOnNoOverflow(Label* label, - Register overflow_check, - BranchDelaySlot bd = PROTECT) { - Branch(label, ge, overflow_check, Operand(zero_reg), bd); - } - - void RetOnOverflow(Register overflow_check, BranchDelaySlot bd = PROTECT) { - Ret(lt, overflow_check, Operand(zero_reg), bd); - } - - void RetOnNoOverflow(Register overflow_check, BranchDelaySlot bd = PROTECT) { - Ret(ge, overflow_check, Operand(zero_reg), bd); - } - - // ------------------------------------------------------------------------- - // Runtime calls. - - // See comments at the beginning of CEntryStub::Generate. - inline void PrepareCEntryArgs(int num_args) { - li(s0, num_args); - li(s1, (num_args - 1) * kPointerSize); - } - - inline void PrepareCEntryFunction(const ExternalReference& ref) { - li(s2, Operand(ref)); - } - - // Call a code stub. - void CallStub(CodeStub* stub, - TypeFeedbackId ast_id = TypeFeedbackId::None(), - Condition cond = cc_always, - Register r1 = zero_reg, - const Operand& r2 = Operand(zero_reg), - BranchDelaySlot bd = PROTECT); - - // Tail call a code stub (jump). - void TailCallStub(CodeStub* stub); - - void CallJSExitStub(CodeStub* stub); - - // Call a runtime routine. - void CallRuntime(const Runtime::Function* f, int num_arguments); - void CallRuntimeSaveDoubles(Runtime::FunctionId id); - - // Convenience function: Same as above, but takes the fid instead. - void CallRuntime(Runtime::FunctionId fid, int num_arguments); - - // Convenience function: call an external reference. - void CallExternalReference(const ExternalReference& ext, - int num_arguments, - BranchDelaySlot bd = PROTECT); - - // Tail call of a runtime routine (jump). - // Like JumpToExternalReference, but also takes care of passing the number - // of parameters. - void TailCallExternalReference(const ExternalReference& ext, - int num_arguments, - int result_size); - - // Convenience function: tail call a runtime routine (jump). - void TailCallRuntime(Runtime::FunctionId fid, - int num_arguments, - int result_size); - - int CalculateStackPassedWords(int num_reg_arguments, - int num_double_arguments); - - // Before calling a C-function from generated code, align arguments on stack - // and add space for the four mips argument slots. - // After aligning the frame, non-register arguments must be stored on the - // stack, after the argument-slots using helper: CFunctionArgumentOperand(). - // The argument count assumes all arguments are word sized. - // 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); - - // Arguments 1-4 are placed in registers a0 thru a3 respectively. - // Arguments 5..n are stored to stack using following: - // sw(t0, CFunctionArgumentOperand(5)); - - // 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 GetCFunctionDoubleResult(const DoubleRegister dst); - - // There are two ways of passing double arguments on MIPS, 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 SetCallCDoubleArguments(DoubleRegister dreg); - void SetCallCDoubleArguments(DoubleRegister dreg1, DoubleRegister dreg2); - void SetCallCDoubleArguments(DoubleRegister dreg, Register reg); - - // Calls an API function. Allocates HandleScope, extracts returned value - // from handle and propagates exceptions. Restores context. stack_space - // - space to be unwound on exit (includes the call JS arguments space and - // the additional space allocated for the fast call). - void CallApiFunctionAndReturn(ExternalReference function, int stack_space); - - // Jump to the builtin routine. - void JumpToExternalReference(const ExternalReference& builtin, - BranchDelaySlot bd = PROTECT); - - // Invoke specified builtin JavaScript function. Adds an entry to - // the unresolved list if the name does not resolve. - void InvokeBuiltin(Builtins::JavaScript id, - InvokeFlag flag, - const CallWrapper& call_wrapper = NullCallWrapper()); - - // Store the code object for the given builtin in the target register and - // setup the function in a1. - void GetBuiltinEntry(Register target, Builtins::JavaScript id); - - // Store the function for the given builtin in the target register. - void GetBuiltinFunction(Register target, Builtins::JavaScript id); - - struct Unresolved { - int pc; - uint32_t flags; // See Bootstrapper::FixupFlags decoders/encoders. - const char* name; - }; - - Handle<Object> CodeObject() { - ASSERT(!code_object_.is_null()); - return code_object_; - } - - // ------------------------------------------------------------------------- - // StatsCounter support. - - void SetCounter(StatsCounter* counter, int value, - Register scratch1, Register scratch2); - void IncrementCounter(StatsCounter* counter, int value, - Register scratch1, Register scratch2); - void DecrementCounter(StatsCounter* counter, int value, - Register scratch1, Register scratch2); - - - // ------------------------------------------------------------------------- - // Debugging. - - // Calls Abort(msg) if the condition cc is not satisfied. - // Use --debug_code to enable. - void Assert(Condition cc, const char* msg, Register rs, Operand rt); - void AssertRegisterIsRoot(Register reg, Heap::RootListIndex index); - void AssertFastElements(Register elements); - - // Like Assert(), but always enabled. - void Check(Condition cc, const char* msg, Register rs, Operand rt); - - // Print a message to stdout and abort execution. - void Abort(const char* msg); - - // Verify restrictions about code generated in stubs. - void set_generating_stub(bool value) { generating_stub_ = value; } - bool generating_stub() { return generating_stub_; } - void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; } - bool allow_stub_calls() { return allow_stub_calls_; } - void set_has_frame(bool value) { has_frame_ = value; } - bool has_frame() { return has_frame_; } - inline bool AllowThisStubCall(CodeStub* stub); - - // --------------------------------------------------------------------------- - // Number utilities. - - // Check whether the value of reg is a power of two and not zero. If not - // control continues at the label not_power_of_two. If reg is a power of two - // the register scratch contains the value of (reg - 1) when control falls - // through. - void JumpIfNotPowerOfTwoOrZero(Register reg, - Register scratch, - Label* not_power_of_two_or_zero); - - // ------------------------------------------------------------------------- - // Smi utilities. - - void SmiTag(Register reg) { - Addu(reg, reg, reg); - } - - // Test for overflow < 0: use BranchOnOverflow() or BranchOnNoOverflow(). - void SmiTagCheckOverflow(Register reg, Register overflow); - void SmiTagCheckOverflow(Register dst, Register src, Register overflow); - - void SmiTag(Register dst, Register src) { - Addu(dst, src, src); - } - - void SmiUntag(Register reg) { - sra(reg, reg, kSmiTagSize); - } - - void SmiUntag(Register dst, Register src) { - sra(dst, src, kSmiTagSize); - } - - // 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); - - // Untag the source value into destination and jump if source is not a smi. - // Souce and destination can be the same register. - void UntagAndJumpIfNotSmi(Register dst, Register src, Label* non_smi_case); - - // Jump the register contains a smi. - void JumpIfSmi(Register value, - Label* smi_label, - Register scratch = at, - BranchDelaySlot bd = PROTECT); - - // Jump if the register contains a non-smi. - void JumpIfNotSmi(Register value, - Label* not_smi_label, - Register scratch = at, - BranchDelaySlot bd = PROTECT); - - // Jump if either of the registers contain a non-smi. - void JumpIfNotBothSmi(Register reg1, Register reg2, Label* on_not_both_smi); - // 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); - - // Abort execution if argument is not a string, enabled via --debug-code. - void AssertString(Register object); - - // Abort execution if argument is not the root value with the given index, - // enabled via --debug-code. - void AssertRootValue(Register src, - Heap::RootListIndex root_value_index, - const char* message); - - // --------------------------------------------------------------------------- - // HeapNumber utilities. - - void JumpIfNotHeapNumber(Register object, - Register heap_number_map, - Register scratch, - Label* on_not_heap_number); - - // ------------------------------------------------------------------------- - // String utilities. - - // Checks if both instance types are sequential ASCII strings and jumps to - // label if either is not. - void JumpIfBothInstanceTypesAreNotSequentialAscii( - Register first_object_instance_type, - Register second_object_instance_type, - Register scratch1, - Register scratch2, - Label* failure); - - // Check if instance type is sequential ASCII string and jump to label if - // it is not. - void JumpIfInstanceTypeIsNotSequentialAscii(Register type, - Register scratch, - Label* failure); - - // Test that both first and second are sequential ASCII strings. - // Assume that they are non-smis. - void JumpIfNonSmisNotBothSequentialAsciiStrings(Register first, - Register second, - Register scratch1, - Register scratch2, - Label* failure); - - // Test that both first and second are sequential ASCII strings. - // Check that they are non-smis. - void JumpIfNotBothSequentialAsciiStrings(Register first, - Register second, - Register scratch1, - Register scratch2, - Label* failure); - - void ClampUint8(Register output_reg, Register input_reg); - - void ClampDoubleToUint8(Register result_reg, - DoubleRegister input_reg, - DoubleRegister temp_double_reg); - - - void LoadInstanceDescriptors(Register map, Register descriptors); - void EnumLength(Register dst, Register map); - void NumberOfOwnDescriptors(Register dst, Register map); - - template<typename Field> - void DecodeField(Register reg) { - static const int shift = Field::kShift; - static const int mask = (Field::kMask >> shift) << kSmiTagSize; - srl(reg, reg, shift); - And(reg, reg, Operand(mask)); - } - - // Activation support. - void EnterFrame(StackFrame::Type type); - void LeaveFrame(StackFrame::Type type); - - // Patch the relocated value (lui/ori pair). - void PatchRelocatedValue(Register li_location, - Register scratch, - Register new_value); - // Get the relocatad value (loaded data) from the lui/ori pair. - void GetRelocatedValue(Register li_location, - Register value, - Register scratch); - - // Expects object in a0 and returns map with validated enum cache - // in a0. Assumes that any other register can be used as a scratch. - void CheckEnumCache(Register null_value, Label* call_runtime); - - // AllocationSiteInfo support. Arrays may have an associated - // AllocationSiteInfo object that can be checked for in order to pretransition - // to another type. - // On entry, receiver_reg should point to the array object. - // scratch_reg gets clobbered. - // If allocation info is present, jump to allocation_info_present - void TestJSArrayForAllocationSiteInfo(Register receiver_reg, - Register scratch_reg, - Condition cond, - Label* allocation_info_present); - - private: - void CallCFunctionHelper(Register function, - int num_reg_arguments, - int num_double_arguments); - - void BranchShort(int16_t offset, BranchDelaySlot bdslot = PROTECT); - void BranchShort(int16_t offset, Condition cond, Register rs, - const Operand& rt, - BranchDelaySlot bdslot = PROTECT); - void BranchShort(Label* L, BranchDelaySlot bdslot = PROTECT); - void BranchShort(Label* L, Condition cond, Register rs, - const Operand& rt, - BranchDelaySlot bdslot = PROTECT); - void BranchAndLinkShort(int16_t offset, BranchDelaySlot bdslot = PROTECT); - void BranchAndLinkShort(int16_t offset, Condition cond, Register rs, - const Operand& rt, - BranchDelaySlot bdslot = PROTECT); - void BranchAndLinkShort(Label* L, BranchDelaySlot bdslot = PROTECT); - void BranchAndLinkShort(Label* L, Condition cond, Register rs, - const Operand& rt, - BranchDelaySlot bdslot = PROTECT); - void J(Label* L, BranchDelaySlot bdslot); - void Jr(Label* L, BranchDelaySlot bdslot); - void Jalr(Label* L, BranchDelaySlot bdslot); - - // Helper functions for generating invokes. - void InvokePrologue(const ParameterCount& expected, - const ParameterCount& actual, - Handle<Code> code_constant, - Register code_reg, - Label* done, - bool* definitely_mismatches, - InvokeFlag flag, - const CallWrapper& call_wrapper, - CallKind call_kind); - - // Get the code for the given builtin. Returns if able to resolve - // the function in the 'resolved' flag. - Handle<Code> ResolveBuiltin(Builtins::JavaScript id, bool* resolved); - - void InitializeNewString(Register string, - Register length, - Heap::RootListIndex map_index, - Register scratch1, - Register scratch2); - - // Helper for implementing JumpIfNotInNewSpace and JumpIfInNewSpace. - void InNewSpace(Register object, - Register scratch, - Condition cond, // eq for new space, ne otherwise. - Label* branch); - - // Helper for finding the mark bits for an address. Afterwards, the - // bitmap register points at the word with the mark bits and the mask - // the position of the first bit. Leaves addr_reg unchanged. - inline void GetMarkBits(Register addr_reg, - Register bitmap_reg, - Register mask_reg); - - // Helper for throwing exceptions. Compute a handler address and jump to - // it. See the implementation for register usage. - void JumpToHandlerEntry(); - - // Compute memory operands for safepoint stack slots. - static int SafepointRegisterStackIndex(int reg_code); - MemOperand SafepointRegisterSlot(Register reg); - MemOperand SafepointRegistersAndDoublesSlot(Register reg); - - bool generating_stub_; - bool allow_stub_calls_; - bool has_frame_; - // This handle will be patched with the code object on installation. - Handle<Object> code_object_; - - // Needs access to SafepointRegisterStackIndex for compiled frame - // traversal. - friend class StandardFrame; -}; - - -// The code patcher is used to patch (typically) small parts of code e.g. for -// debugging and other types of instrumentation. When using the code patcher -// the exact number of bytes specified must be emitted. It is not legal to emit -// relocation information. If any of these constraints are violated it causes -// an assertion to fail. -class CodePatcher { - public: - CodePatcher(byte* address, int instructions); - virtual ~CodePatcher(); - - // Macro assembler to emit code. - MacroAssembler* masm() { return &masm_; } - - // Emit an instruction directly. - void Emit(Instr instr); - - // Emit an address directly. - void Emit(Address addr); - - // Change the condition part of an instruction leaving the rest of the current - // instruction unchanged. - void ChangeBranchCondition(Condition cond); - - private: - byte* address_; // The address of the code being patched. - int instructions_; // Number of instructions of the expected patch size. - int size_; // Number of bytes of the expected patch size. - MacroAssembler masm_; // Macro assembler used to generate the code. -}; - - - -#ifdef GENERATED_CODE_COVERAGE -#define CODE_COVERAGE_STRINGIFY(x) #x -#define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x) -#define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__) -#define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm-> -#else -#define ACCESS_MASM(masm) masm-> -#endif - -} } // namespace v8::internal - -#endif // V8_MIPS_MACRO_ASSEMBLER_MIPS_H_ |