src/mips/macro-assembler-mips.h - platform/external/v8 - Git at Google

 // Copyright 2010 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"

 namespace v8 {
 namespace internal {

 // Forward declaration.
 class JumpTarget;

 // Register at is used for instruction generation. So it is not safe to use it
 // unless we know exactly what we do.

 // Registers aliases
 // cp is assumed to be a callee saved register.
 const Register cp = s7;     // JavaScript context pointer
 const Register fp = s8_fp;  // Alias fp

 enum InvokeJSFlags {
   CALL_JS,
   JUMP_JS
 };

 // MacroAssembler implements a collection of frequently used macros.
 class MacroAssembler: public Assembler {
  public:
   MacroAssembler(void* buffer, int size);

   // Jump, Call, and Ret pseudo instructions implementing inter-working.
   void Jump(const Operand& target,
             Condition cond = cc_always,
             Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
   void Call(const Operand& target,
             Condition cond = cc_always,
             Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
   void Jump(Register target,
             Condition cond = cc_always,
             Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
   void Jump(byte* target, RelocInfo::Mode rmode,
             Condition cond = cc_always,
             Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
   void Jump(Handle<Code> code, RelocInfo::Mode rmode,
             Condition cond = cc_always,
             Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
   void Call(Register target,
             Condition cond = cc_always,
             Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
   void Call(byte* target, RelocInfo::Mode rmode,
             Condition cond = cc_always,
             Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
   void Call(Handle<Code> code, RelocInfo::Mode rmode,
             Condition cond = cc_always,
             Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
   void Ret(Condition cond = cc_always,
            Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
   void Branch(Condition cond, int16_t offset, Register rs = zero_reg,
               const Operand& rt = Operand(zero_reg), Register scratch = at);
   void Branch(Condition cond, Label* L, Register rs = zero_reg,
               const Operand& rt = Operand(zero_reg), Register scratch = at);
   // conditionnal branch and link
   void BranchAndLink(Condition cond, int16_t offset, Register rs = zero_reg,
                      const Operand& rt = Operand(zero_reg),
                      Register scratch = at);
   void BranchAndLink(Condition cond, Label* L, Register rs = zero_reg,
                      const Operand& rt = Operand(zero_reg),
                      Register scratch = at);

   // 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);

   void Call(Label* target);

   // 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(cc_always, 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);

   // Load an external reference.
   void LoadExternalReference(Register reg, ExternalReference ext) {
     li(reg, Operand(ext));
   }

   // Sets the remembered set bit for [address+offset].
   void RecordWrite(Register object, Register offset, Register scratch);


   // ---------------------------------------------------------------------------
   // 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(Add);
   DEFINE_INSTRUCTION(Addu);
   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_INSTRUCTION(Slt);
   DEFINE_INSTRUCTION(Sltu);

 #undef DEFINE_INSTRUCTION
 #undef DEFINE_INSTRUCTION2


   //------------Pseudo-instructions-------------

   void mov(Register rd, Register rt) { or_(rd, rt, zero_reg); }
   // Move the logical ones complement of source to dest.
   void movn(Register rd, Register rt);


   // load int32 in the rd register
   void li(Register rd, Operand j, bool gen2instr = false);
   inline void li(Register rd, int32_t j, bool gen2instr = false) {
     li(rd, Operand(j), gen2instr);
   }

   // Exception-generating instructions and debugging support
   void stop(const char* msg);


   // 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 Push(Register src) {
     Addu(sp, sp, Operand(-kPointerSize));
     sw(src, MemOperand(sp, 0));
   }
   inline void push(Register src) { Push(src); }

   void Push(Register src, Condition cond, Register tst1, Register tst2) {
     // Since we don't have conditionnal execution we use a Branch.
     Branch(cond, 3, tst1, Operand(tst2));
     Addu(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 Pop(Register dst) {
     lw(dst, MemOperand(sp, 0));
     Addu(sp, sp, Operand(kPointerSize));
   }
   void Pop() {
     Add(sp, sp, Operand(kPointerSize));
   }


   // ---------------------------------------------------------------------------
   // Activation frames

   void EnterInternalFrame() { EnterFrame(StackFrame::INTERNAL); }
   void LeaveInternalFrame() { LeaveFrame(StackFrame::INTERNAL); }

   // Enter specific kind of exit frame; either EXIT or
   // EXIT_DEBUG. Expects the number of arguments in register a0 and
   // the builtin function to call in register a1.
   // On output hold_argc, hold_function, and hold_argv are setup.
   void EnterExitFrame(ExitFrame::Mode mode,
                       Register hold_argc,
                       Register hold_argv,
                       Register hold_function);

   // Leave the current exit frame. Expects the return value in v0.
   void LeaveExitFrame(ExitFrame::Mode mode);

   // Align the stack by optionally pushing a Smi zero.
   void AlignStack(int offset);

   void SetupAlignedCall(Register scratch, int arg_count = 0);
   void ReturnFromAlignedCall();


   // ---------------------------------------------------------------------------
   // JavaScript invokes

   // Invoke the JavaScript function code by either calling or jumping.
   void InvokeCode(Register code,
                   const ParameterCount& expected,
                   const ParameterCount& actual,
                   InvokeFlag flag);

   void InvokeCode(Handle<Code> code,
                   const ParameterCount& expected,
                   const ParameterCount& actual,
                   RelocInfo::Mode rmode,
                   InvokeFlag flag);

   // 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);


 #ifdef ENABLE_DEBUGGER_SUPPORT
   // ---------------------------------------------------------------------------
   // Debugger Support

   void SaveRegistersToMemory(RegList regs);
   void RestoreRegistersFromMemory(RegList regs);
   void CopyRegistersFromMemoryToStack(Register base, RegList regs);
   void CopyRegistersFromStackToMemory(Register base,
                                       Register scratch,
                                       RegList regs);
   void DebugBreak();
 #endif


   // ---------------------------------------------------------------------------
   // Exception handling

   // Push a new try handler and link into try handler chain.
   // The return address must be passed in register ra.
   void PushTryHandler(CodeLocation try_location, HandlerType type);

   // Unlink the stack handler on top of the stack from the try handler chain.
   // Must preserve the result register.
   void PopTryHandler();


   // ---------------------------------------------------------------------------
   // Support functions.

   void GetObjectType(Register function,
                      Register map,
                      Register type_reg);

   inline void BranchOnSmi(Register value, Label* smi_label,
                           Register scratch = at) {
     ASSERT_EQ(0, kSmiTag);
     andi(scratch, value, kSmiTagMask);
     Branch(eq, smi_label, scratch, Operand(zero_reg));
   }


   inline void BranchOnNotSmi(Register value, Label* not_smi_label,
                              Register scratch = at) {
     ASSERT_EQ(0, kSmiTag);
     andi(scratch, value, kSmiTagMask);
     Branch(ne, not_smi_label, scratch, Operand(zero_reg));
   }

   void CallBuiltin(ExternalReference builtin_entry);
   void CallBuiltin(Register target);
   void JumpToBuiltin(ExternalReference builtin_entry);
   void JumpToBuiltin(Register target);

   // Generates code for reporting that an illegal operation has
   // occurred.
   void IllegalOperation(int num_arguments);


   // ---------------------------------------------------------------------------
   // Runtime calls

   // Call a code stub.
   void CallStub(CodeStub* stub, Condition cond = cc_always,
                 Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
   void CallJSExitStub(CodeStub* stub);

   // Return from a code stub after popping its arguments.
   void StubReturn(int argc);

   // Call a runtime routine.
   void CallRuntime(Runtime::Function* f, int num_arguments);

   // Convenience function: Same as above, but takes the fid instead.
   void CallRuntime(Runtime::FunctionId fid, int num_arguments);

   // 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);

   // Jump to the builtin routine.
   void JumpToExternalReference(const ExternalReference& builtin);

   // Invoke specified builtin JavaScript function. Adds an entry to
   // the unresolved list if the name does not resolve.
   void InvokeBuiltin(Builtins::JavaScript id, InvokeJSFlags flags);

   // Store the code object for the given builtin in the target register and
   // setup the function in r1.
   void GetBuiltinEntry(Register target, Builtins::JavaScript id);

   struct Unresolved {
     int pc;
     uint32_t flags;  // see Bootstrapper::FixupFlags decoders/encoders.
     const char* name;
   };
   List<Unresolved>* unresolved() { return &unresolved_; }

   Handle<Object> CodeObject() { return code_object_; }


   // ---------------------------------------------------------------------------
   // Stack limit support

   void StackLimitCheck(Label* on_stack_limit_hit);


   // ---------------------------------------------------------------------------
   // 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);

   // 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_; }

  private:
   List<Unresolved> unresolved_;
   bool generating_stub_;
   bool allow_stub_calls_;
   // This handle will be patched with the code object on installation.
   Handle<Object> code_object_;

   void Jump(intptr_t target, RelocInfo::Mode rmode, Condition cond = cc_always,
             Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
   void Call(intptr_t target, RelocInfo::Mode rmode, Condition cond = cc_always,
             Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));

   // Helper functions for generating invokes.
   void InvokePrologue(const ParameterCount& expected,
                       const ParameterCount& actual,
                       Handle<Code> code_constant,
                       Register code_reg,
                       Label* done,
                       InvokeFlag flag);

   // 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);

   // Activation support.
   // EnterFrame clobbers t0 and t1.
   void EnterFrame(StackFrame::Type type);
   void LeaveFrame(StackFrame::Type type);
 };


 // -----------------------------------------------------------------------------
 // Static helper functions.

 // Generate a MemOperand for loading a field from an object.
 static inline MemOperand FieldMemOperand(Register object, int offset) {
   return MemOperand(object, offset - kHeapObjectTag);
 }


 #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_
	// Copyright 2010 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"

	namespace v8 {
	namespace internal {

	// Forward declaration.
	class JumpTarget;

	// Register at is used for instruction generation. So it is not safe to use it
	// unless we know exactly what we do.

	// Registers aliases
	// cp is assumed to be a callee saved register.
	const Register cp = s7; // JavaScript context pointer
	const Register fp = s8_fp; // Alias fp

	enum InvokeJSFlags {
	CALL_JS,
	JUMP_JS
	};

	// MacroAssembler implements a collection of frequently used macros.
	class MacroAssembler: public Assembler {
	public:
	MacroAssembler(void* buffer, int size);

	// Jump, Call, and Ret pseudo instructions implementing inter-working.
	void Jump(const Operand& target,
	Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
	void Call(const Operand& target,
	Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
	void Jump(Register target,
	Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
	void Jump(byte* target, RelocInfo::Mode rmode,
	Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
	void Jump(Handle<Code> code, RelocInfo::Mode rmode,
	Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
	void Call(Register target,
	Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
	void Call(byte* target, RelocInfo::Mode rmode,
	Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
	void Call(Handle<Code> code, RelocInfo::Mode rmode,
	Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
	void Ret(Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
	void Branch(Condition cond, int16_t offset, Register rs = zero_reg,
	const Operand& rt = Operand(zero_reg), Register scratch = at);
	void Branch(Condition cond, Label* L, Register rs = zero_reg,
	const Operand& rt = Operand(zero_reg), Register scratch = at);
	// conditionnal branch and link
	void BranchAndLink(Condition cond, int16_t offset, Register rs = zero_reg,
	const Operand& rt = Operand(zero_reg),
	Register scratch = at);
	void BranchAndLink(Condition cond, Label* L, Register rs = zero_reg,
	const Operand& rt = Operand(zero_reg),
	Register scratch = at);

	// 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);

	void Call(Label* target);

	// 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(cc_always, 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);

	// Load an external reference.
	void LoadExternalReference(Register reg, ExternalReference ext) {
	li(reg, Operand(ext));
	}

	// Sets the remembered set bit for [address+offset].
	void RecordWrite(Register object, Register offset, Register scratch);


	// ---------------------------------------------------------------------------
	// 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(Add);
	DEFINE_INSTRUCTION(Addu);
	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_INSTRUCTION(Slt);
	DEFINE_INSTRUCTION(Sltu);

	#undef DEFINE_INSTRUCTION
	#undef DEFINE_INSTRUCTION2


	//------------Pseudo-instructions-------------

	void mov(Register rd, Register rt) { or_(rd, rt, zero_reg); }
	// Move the logical ones complement of source to dest.
	void movn(Register rd, Register rt);


	// load int32 in the rd register
	void li(Register rd, Operand j, bool gen2instr = false);
	inline void li(Register rd, int32_t j, bool gen2instr = false) {
	li(rd, Operand(j), gen2instr);
	}

	// Exception-generating instructions and debugging support
	void stop(const char* msg);


	// 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 Push(Register src) {
	Addu(sp, sp, Operand(-kPointerSize));
	sw(src, MemOperand(sp, 0));
	}
	inline void push(Register src) { Push(src); }

	void Push(Register src, Condition cond, Register tst1, Register tst2) {
	// Since we don't have conditionnal execution we use a Branch.
	Branch(cond, 3, tst1, Operand(tst2));
	Addu(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 Pop(Register dst) {
	lw(dst, MemOperand(sp, 0));
	Addu(sp, sp, Operand(kPointerSize));
	}
	void Pop() {
	Add(sp, sp, Operand(kPointerSize));
	}


	// ---------------------------------------------------------------------------
	// Activation frames

	void EnterInternalFrame() { EnterFrame(StackFrame::INTERNAL); }
	void LeaveInternalFrame() { LeaveFrame(StackFrame::INTERNAL); }

	// Enter specific kind of exit frame; either EXIT or
	// EXIT_DEBUG. Expects the number of arguments in register a0 and
	// the builtin function to call in register a1.
	// On output hold_argc, hold_function, and hold_argv are setup.
	void EnterExitFrame(ExitFrame::Mode mode,
	Register hold_argc,
	Register hold_argv,
	Register hold_function);

	// Leave the current exit frame. Expects the return value in v0.
	void LeaveExitFrame(ExitFrame::Mode mode);

	// Align the stack by optionally pushing a Smi zero.
	void AlignStack(int offset);

	void SetupAlignedCall(Register scratch, int arg_count = 0);
	void ReturnFromAlignedCall();


	// ---------------------------------------------------------------------------
	// JavaScript invokes

	// Invoke the JavaScript function code by either calling or jumping.
	void InvokeCode(Register code,
	const ParameterCount& expected,
	const ParameterCount& actual,
	InvokeFlag flag);

	void InvokeCode(Handle<Code> code,
	const ParameterCount& expected,
	const ParameterCount& actual,
	RelocInfo::Mode rmode,
	InvokeFlag flag);

	// 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);


	#ifdef ENABLE_DEBUGGER_SUPPORT
	// ---------------------------------------------------------------------------
	// Debugger Support

	void SaveRegistersToMemory(RegList regs);
	void RestoreRegistersFromMemory(RegList regs);
	void CopyRegistersFromMemoryToStack(Register base, RegList regs);
	void CopyRegistersFromStackToMemory(Register base,
	Register scratch,
	RegList regs);
	void DebugBreak();
	#endif


	// ---------------------------------------------------------------------------
	// Exception handling

	// Push a new try handler and link into try handler chain.
	// The return address must be passed in register ra.
	void PushTryHandler(CodeLocation try_location, HandlerType type);

	// Unlink the stack handler on top of the stack from the try handler chain.
	// Must preserve the result register.
	void PopTryHandler();


	// ---------------------------------------------------------------------------
	// Support functions.

	void GetObjectType(Register function,
	Register map,
	Register type_reg);

	inline void BranchOnSmi(Register value, Label* smi_label,
	Register scratch = at) {
	ASSERT_EQ(0, kSmiTag);
	andi(scratch, value, kSmiTagMask);
	Branch(eq, smi_label, scratch, Operand(zero_reg));
	}


	inline void BranchOnNotSmi(Register value, Label* not_smi_label,
	Register scratch = at) {
	ASSERT_EQ(0, kSmiTag);
	andi(scratch, value, kSmiTagMask);
	Branch(ne, not_smi_label, scratch, Operand(zero_reg));
	}

	void CallBuiltin(ExternalReference builtin_entry);
	void CallBuiltin(Register target);
	void JumpToBuiltin(ExternalReference builtin_entry);
	void JumpToBuiltin(Register target);

	// Generates code for reporting that an illegal operation has
	// occurred.
	void IllegalOperation(int num_arguments);


	// ---------------------------------------------------------------------------
	// Runtime calls

	// Call a code stub.
	void CallStub(CodeStub* stub, Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
	void CallJSExitStub(CodeStub* stub);

	// Return from a code stub after popping its arguments.
	void StubReturn(int argc);

	// Call a runtime routine.
	void CallRuntime(Runtime::Function* f, int num_arguments);

	// Convenience function: Same as above, but takes the fid instead.
	void CallRuntime(Runtime::FunctionId fid, int num_arguments);

	// 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);

	// Jump to the builtin routine.
	void JumpToExternalReference(const ExternalReference& builtin);

	// Invoke specified builtin JavaScript function. Adds an entry to
	// the unresolved list if the name does not resolve.
	void InvokeBuiltin(Builtins::JavaScript id, InvokeJSFlags flags);

	// Store the code object for the given builtin in the target register and
	// setup the function in r1.
	void GetBuiltinEntry(Register target, Builtins::JavaScript id);

	struct Unresolved {
	int pc;
	uint32_t flags; // see Bootstrapper::FixupFlags decoders/encoders.
	const char* name;
	};
	List<Unresolved>* unresolved() { return &unresolved_; }

	Handle<Object> CodeObject() { return code_object_; }


	// ---------------------------------------------------------------------------
	// Stack limit support

	void StackLimitCheck(Label* on_stack_limit_hit);


	// ---------------------------------------------------------------------------
	// 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);

	// 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_; }

	private:
	List<Unresolved> unresolved_;
	bool generating_stub_;
	bool allow_stub_calls_;
	// This handle will be patched with the code object on installation.
	Handle<Object> code_object_;

	void Jump(intptr_t target, RelocInfo::Mode rmode, Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));
	void Call(intptr_t target, RelocInfo::Mode rmode, Condition cond = cc_always,
	Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg));

	// Helper functions for generating invokes.
	void InvokePrologue(const ParameterCount& expected,
	const ParameterCount& actual,
	Handle<Code> code_constant,
	Register code_reg,
	Label* done,
	InvokeFlag flag);

	// 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);

	// Activation support.
	// EnterFrame clobbers t0 and t1.
	void EnterFrame(StackFrame::Type type);
	void LeaveFrame(StackFrame::Type type);
	};


	// -----------------------------------------------------------------------------
	// Static helper functions.

	// Generate a MemOperand for loading a field from an object.
	static inline MemOperand FieldMemOperand(Register object, int offset) {
	return MemOperand(object, offset - kHeapObjectTag);
	}



	#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_