| // Copyright 2009 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_X64_MACRO_ASSEMBLER_X64_H_ |
| #define V8_X64_MACRO_ASSEMBLER_X64_H_ |
| |
| #include "assembler.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Default scratch register used by MacroAssembler (and other code that needs |
| // a spare register). The register isn't callee save, and not used by the |
| // function calling convention. |
| static const Register kScratchRegister = r10; |
| |
| // Convenience for platform-independent signatures. |
| typedef Operand MemOperand; |
| |
| // Forward declaration. |
| class JumpTarget; |
| |
| struct SmiIndex { |
| SmiIndex(Register index_register, ScaleFactor scale) |
| : reg(index_register), |
| scale(scale) {} |
| Register reg; |
| ScaleFactor scale; |
| }; |
| |
| // MacroAssembler implements a collection of frequently used macros. |
| class MacroAssembler: public Assembler { |
| public: |
| MacroAssembler(void* buffer, int size); |
| |
| void LoadRoot(Register destination, Heap::RootListIndex index); |
| void CompareRoot(Register with, Heap::RootListIndex index); |
| void CompareRoot(Operand with, Heap::RootListIndex index); |
| void PushRoot(Heap::RootListIndex index); |
| |
| // --------------------------------------------------------------------------- |
| // GC Support |
| |
| // Set the remembered set bit for [object+offset]. |
| // object is the object being stored into, value is the object being stored. |
| // If offset is zero, then the scratch register contains the array index into |
| // the elements array represented as a Smi. |
| // All registers are clobbered by the operation. |
| void RecordWrite(Register object, |
| int offset, |
| Register value, |
| Register scratch); |
| |
| // Set the remembered set bit for [object+offset]. |
| // The value is known to not be a smi. |
| // object is the object being stored into, value is the object being stored. |
| // If offset is zero, then the scratch register contains the array index into |
| // the elements array represented as a Smi. |
| // All registers are clobbered by the operation. |
| void RecordWriteNonSmi(Register object, |
| int offset, |
| Register value, |
| Register scratch); |
| |
| |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| // --------------------------------------------------------------------------- |
| // Debugger Support |
| |
| void SaveRegistersToMemory(RegList regs); |
| void RestoreRegistersFromMemory(RegList regs); |
| void PushRegistersFromMemory(RegList regs); |
| void PopRegistersToMemory(RegList regs); |
| void CopyRegistersFromStackToMemory(Register base, |
| Register scratch, |
| RegList regs); |
| void DebugBreak(); |
| #endif |
| |
| // --------------------------------------------------------------------------- |
| // Stack limit support |
| |
| // Do simple test for stack overflow. This doesn't handle an overflow. |
| void StackLimitCheck(Label* on_stack_limit_hit); |
| |
| // --------------------------------------------------------------------------- |
| // Activation frames |
| |
| void EnterInternalFrame() { EnterFrame(StackFrame::INTERNAL); } |
| void LeaveInternalFrame() { LeaveFrame(StackFrame::INTERNAL); } |
| |
| void EnterConstructFrame() { EnterFrame(StackFrame::CONSTRUCT); } |
| void LeaveConstructFrame() { LeaveFrame(StackFrame::CONSTRUCT); } |
| |
| // Enter specific kind of exit frame; either in normal or |
| // debug mode. Expects the number of arguments in register rax and |
| // sets up the number of arguments in register rdi and the pointer |
| // to the first argument in register rsi. |
| void EnterExitFrame(ExitFrame::Mode mode, int result_size = 1); |
| |
| // Leave the current exit frame. Expects/provides the return value in |
| // register rax:rdx (untouched) and the pointer to the first |
| // argument in register rsi. |
| void LeaveExitFrame(ExitFrame::Mode mode, int result_size = 1); |
| |
| |
| // --------------------------------------------------------------------------- |
| // 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); |
| |
| void InvokeFunction(JSFunction* function, |
| const ParameterCount& actual, |
| InvokeFlag flag); |
| |
| // 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); |
| |
| // Store the code object for the given builtin in the target register. |
| void GetBuiltinEntry(Register target, Builtins::JavaScript id); |
| |
| |
| // --------------------------------------------------------------------------- |
| // Smi tagging, untagging and operations on tagged smis. |
| |
| // Conversions between tagged smi values and non-tagged integer values. |
| |
| // Tag an integer value. The result must be known to be a valid smi value. |
| // Only uses the low 32 bits of the src register. Sets the N and Z flags |
| // based on the value of the resulting integer. |
| void Integer32ToSmi(Register dst, Register src); |
| |
| // Tag an integer value if possible, or jump the integer value cannot be |
| // represented as a smi. Only uses the low 32 bit of the src registers. |
| // NOTICE: Destroys the dst register even if unsuccessful! |
| void Integer32ToSmi(Register dst, Register src, Label* on_overflow); |
| |
| // Adds constant to src and tags the result as a smi. |
| // Result must be a valid smi. |
| void Integer64PlusConstantToSmi(Register dst, Register src, int constant); |
| |
| // Convert smi to 32-bit integer. I.e., not sign extended into |
| // high 32 bits of destination. |
| void SmiToInteger32(Register dst, Register src); |
| |
| // Convert smi to 64-bit integer (sign extended if necessary). |
| void SmiToInteger64(Register dst, Register src); |
| |
| // Multiply a positive smi's integer value by a power of two. |
| // Provides result as 64-bit integer value. |
| void PositiveSmiTimesPowerOfTwoToInteger64(Register dst, |
| Register src, |
| int power); |
| |
| // Simple comparison of smis. |
| void SmiCompare(Register dst, Register src); |
| void SmiCompare(Register dst, Smi* src); |
| void SmiCompare(const Operand& dst, Register src); |
| void SmiCompare(const Operand& dst, Smi* src); |
| // Sets sign and zero flags depending on value of smi in register. |
| void SmiTest(Register src); |
| |
| // Functions performing a check on a known or potential smi. Returns |
| // a condition that is satisfied if the check is successful. |
| |
| // Is the value a tagged smi. |
| Condition CheckSmi(Register src); |
| |
| // Is the value a positive tagged smi. |
| Condition CheckPositiveSmi(Register src); |
| |
| // Are both values tagged smis. |
| Condition CheckBothSmi(Register first, Register second); |
| |
| // Are both values tagged smis. |
| Condition CheckBothPositiveSmi(Register first, Register second); |
| |
| // Are either value a tagged smi. |
| Condition CheckEitherSmi(Register first, Register second); |
| |
| // Is the value the minimum smi value (since we are using |
| // two's complement numbers, negating the value is known to yield |
| // a non-smi value). |
| Condition CheckIsMinSmi(Register src); |
| |
| // Checks whether an 32-bit integer value is a valid for conversion |
| // to a smi. |
| Condition CheckInteger32ValidSmiValue(Register src); |
| |
| // Checks whether an 32-bit unsigned integer value is a valid for |
| // conversion to a smi. |
| Condition CheckUInteger32ValidSmiValue(Register src); |
| |
| // Test-and-jump functions. Typically combines a check function |
| // above with a conditional jump. |
| |
| // Jump if the value cannot be represented by a smi. |
| void JumpIfNotValidSmiValue(Register src, Label* on_invalid); |
| |
| // Jump if the unsigned integer value cannot be represented by a smi. |
| void JumpIfUIntNotValidSmiValue(Register src, Label* on_invalid); |
| |
| // Jump to label if the value is a tagged smi. |
| void JumpIfSmi(Register src, Label* on_smi); |
| |
| // Jump to label if the value is not a tagged smi. |
| void JumpIfNotSmi(Register src, Label* on_not_smi); |
| |
| // Jump to label if the value is not a positive tagged smi. |
| void JumpIfNotPositiveSmi(Register src, Label* on_not_smi); |
| |
| // Jump to label if the value, which must be a tagged smi, has value equal |
| // to the constant. |
| void JumpIfSmiEqualsConstant(Register src, Smi* constant, Label* on_equals); |
| |
| // Jump if either or both register are not smi values. |
| void JumpIfNotBothSmi(Register src1, Register src2, Label* on_not_both_smi); |
| |
| // Jump if either or both register are not positive smi values. |
| void JumpIfNotBothPositiveSmi(Register src1, Register src2, |
| Label* on_not_both_smi); |
| |
| // Operations on tagged smi values. |
| |
| // Smis represent a subset of integers. The subset is always equivalent to |
| // a two's complement interpretation of a fixed number of bits. |
| |
| // Optimistically adds an integer constant to a supposed smi. |
| // If the src is not a smi, or the result is not a smi, jump to |
| // the label. |
| void SmiTryAddConstant(Register dst, |
| Register src, |
| Smi* constant, |
| Label* on_not_smi_result); |
| |
| // Add an integer constant to a tagged smi, giving a tagged smi as result. |
| // No overflow testing on the result is done. |
| void SmiAddConstant(Register dst, Register src, Smi* constant); |
| |
| // Add an integer constant to a tagged smi, giving a tagged smi as result, |
| // or jumping to a label if the result cannot be represented by a smi. |
| void SmiAddConstant(Register dst, |
| Register src, |
| Smi* constant, |
| Label* on_not_smi_result); |
| |
| // Subtract an integer constant from a tagged smi, giving a tagged smi as |
| // result. No testing on the result is done. |
| void SmiSubConstant(Register dst, Register src, Smi* constant); |
| |
| // Subtract an integer constant from a tagged smi, giving a tagged smi as |
| // result, or jumping to a label if the result cannot be represented by a smi. |
| void SmiSubConstant(Register dst, |
| Register src, |
| Smi* constant, |
| Label* on_not_smi_result); |
| |
| // Negating a smi can give a negative zero or too large positive value. |
| // NOTICE: This operation jumps on success, not failure! |
| void SmiNeg(Register dst, |
| Register src, |
| Label* on_smi_result); |
| |
| // Adds smi values and return the result as a smi. |
| // If dst is src1, then src1 will be destroyed, even if |
| // the operation is unsuccessful. |
| void SmiAdd(Register dst, |
| Register src1, |
| Register src2, |
| Label* on_not_smi_result); |
| |
| // Subtracts smi values and return the result as a smi. |
| // If dst is src1, then src1 will be destroyed, even if |
| // the operation is unsuccessful. |
| void SmiSub(Register dst, |
| Register src1, |
| Register src2, |
| Label* on_not_smi_result); |
| |
| // Multiplies smi values and return the result as a smi, |
| // if possible. |
| // If dst is src1, then src1 will be destroyed, even if |
| // the operation is unsuccessful. |
| void SmiMul(Register dst, |
| Register src1, |
| Register src2, |
| Label* on_not_smi_result); |
| |
| // Divides one smi by another and returns the quotient. |
| // Clobbers rax and rdx registers. |
| void SmiDiv(Register dst, |
| Register src1, |
| Register src2, |
| Label* on_not_smi_result); |
| |
| // Divides one smi by another and returns the remainder. |
| // Clobbers rax and rdx registers. |
| void SmiMod(Register dst, |
| Register src1, |
| Register src2, |
| Label* on_not_smi_result); |
| |
| // Bitwise operations. |
| void SmiNot(Register dst, Register src); |
| void SmiAnd(Register dst, Register src1, Register src2); |
| void SmiOr(Register dst, Register src1, Register src2); |
| void SmiXor(Register dst, Register src1, Register src2); |
| void SmiAndConstant(Register dst, Register src1, Smi* constant); |
| void SmiOrConstant(Register dst, Register src1, Smi* constant); |
| void SmiXorConstant(Register dst, Register src1, Smi* constant); |
| |
| void SmiShiftLeftConstant(Register dst, |
| Register src, |
| int shift_value, |
| Label* on_not_smi_result); |
| void SmiShiftLogicalRightConstant(Register dst, |
| Register src, |
| int shift_value, |
| Label* on_not_smi_result); |
| void SmiShiftArithmeticRightConstant(Register dst, |
| Register src, |
| int shift_value); |
| |
| // Shifts a smi value to the left, and returns the result if that is a smi. |
| // Uses and clobbers rcx, so dst may not be rcx. |
| void SmiShiftLeft(Register dst, |
| Register src1, |
| Register src2, |
| Label* on_not_smi_result); |
| // Shifts a smi value to the right, shifting in zero bits at the top, and |
| // returns the unsigned intepretation of the result if that is a smi. |
| // Uses and clobbers rcx, so dst may not be rcx. |
| void SmiShiftLogicalRight(Register dst, |
| Register src1, |
| Register src2, |
| Label* on_not_smi_result); |
| // Shifts a smi value to the right, sign extending the top, and |
| // returns the signed intepretation of the result. That will always |
| // be a valid smi value, since it's numerically smaller than the |
| // original. |
| // Uses and clobbers rcx, so dst may not be rcx. |
| void SmiShiftArithmeticRight(Register dst, |
| Register src1, |
| Register src2); |
| |
| // Specialized operations |
| |
| // Select the non-smi register of two registers where exactly one is a |
| // smi. If neither are smis, jump to the failure label. |
| void SelectNonSmi(Register dst, |
| Register src1, |
| Register src2, |
| Label* on_not_smis); |
| |
| // Converts, if necessary, a smi to a combination of number and |
| // multiplier to be used as a scaled index. |
| // The src register contains a *positive* smi value. The shift is the |
| // power of two to multiply the index value by (e.g. |
| // to index by smi-value * kPointerSize, pass the smi and kPointerSizeLog2). |
| // The returned index register may be either src or dst, depending |
| // on what is most efficient. If src and dst are different registers, |
| // src is always unchanged. |
| SmiIndex SmiToIndex(Register dst, Register src, int shift); |
| |
| // Converts a positive smi to a negative index. |
| SmiIndex SmiToNegativeIndex(Register dst, Register src, int shift); |
| |
| // Basic Smi operations. |
| void Move(Register dst, Smi* source) { |
| Set(dst, reinterpret_cast<int64_t>(source)); |
| } |
| |
| void Move(const Operand& dst, Smi* source) { |
| Set(dst, reinterpret_cast<int64_t>(source)); |
| } |
| |
| void Push(Smi* smi); |
| void Test(const Operand& dst, Smi* source); |
| |
| // --------------------------------------------------------------------------- |
| // String macros. |
| void JumpIfNotBothSequentialAsciiStrings(Register first_object, |
| Register second_object, |
| Register scratch1, |
| Register scratch2, |
| Label* on_not_both_flat_ascii); |
| |
| // --------------------------------------------------------------------------- |
| // Macro instructions. |
| |
| // Load a register with a long value as efficiently as possible. |
| void Set(Register dst, int64_t x); |
| void Set(const Operand& dst, int64_t x); |
| |
| // Handle support |
| void Move(Register dst, Handle<Object> source); |
| void Move(const Operand& dst, Handle<Object> source); |
| void Cmp(Register dst, Handle<Object> source); |
| void Cmp(const Operand& dst, Handle<Object> source); |
| void Push(Handle<Object> source); |
| |
| // Emit code to discard a non-negative number of pointer-sized elements |
| // from the stack, clobbering only the rsp register. |
| void Drop(int stack_elements); |
| |
| void Call(Label* target) { call(target); } |
| |
| // Control Flow |
| void Jump(Address destination, RelocInfo::Mode rmode); |
| void Jump(ExternalReference ext); |
| void Jump(Handle<Code> code_object, RelocInfo::Mode rmode); |
| |
| void Call(Address destination, RelocInfo::Mode rmode); |
| void Call(ExternalReference ext); |
| void Call(Handle<Code> code_object, RelocInfo::Mode rmode); |
| |
| // Compare object type for heap object. |
| // Always use unsigned comparisons: above and below, not less and greater. |
| // Incoming register is heap_object and outgoing register is map. |
| // They may be the same register, and may be kScratchRegister. |
| void CmpObjectType(Register heap_object, InstanceType type, Register map); |
| |
| // Compare instance type for map. |
| // Always use unsigned comparisons: above and below, not less and greater. |
| void CmpInstanceType(Register map, InstanceType type); |
| |
| // 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) |
| void CheckMap(Register obj, |
| Handle<Map> map, |
| Label* fail, |
| bool is_heap_object); |
| |
| // Check if the object in register heap_object is a string. Afterwards the |
| // register map contains the object map and the register instance_type |
| // contains the instance_type. The registers map and instance_type can be the |
| // same in which case it contains the instance type afterwards. Either of the |
| // registers map and instance_type can be the same as heap_object. |
| Condition IsObjectStringType(Register heap_object, |
| Register map, |
| Register instance_type); |
| |
| // FCmp is similar to integer cmp, but requires unsigned |
| // jcc instructions (je, ja, jae, jb, jbe, je, and jz). |
| void FCmp(); |
| |
| // Abort execution if argument is not a number. Used in debug code. |
| void AbortIfNotNumber(Register object, const char* msg); |
| |
| // --------------------------------------------------------------------------- |
| // Exception handling |
| |
| // Push a new try handler and link into try handler chain. The return |
| // address must be pushed before calling this helper. |
| void PushTryHandler(CodeLocation try_location, HandlerType type); |
| |
| // Unlink the stack handler on top of the stack from the try handler chain. |
| void PopTryHandler(); |
| |
| // --------------------------------------------------------------------------- |
| // Inline caching support |
| |
| // Generates code that verifies that the maps of objects in the |
| // prototype chain of object hasn't changed since the code was |
| // generated and branches to the miss label if any map has. If |
| // necessary the function also generates code for security check |
| // in case of global object holders. The scratch and holder |
| // registers are always clobbered, but the object register is only |
| // clobbered if it the same as the holder register. The function |
| // returns a register containing the holder - either object_reg or |
| // holder_reg. |
| Register CheckMaps(JSObject* object, Register object_reg, |
| JSObject* holder, Register holder_reg, |
| Register scratch, Label* miss); |
| |
| // Generate code for checking access rights - used for security checks |
| // on access to global objects across environments. The holder register |
| // is left untouched, but the scratch register and kScratchRegister, |
| // which must be different, are clobbered. |
| void CheckAccessGlobalProxy(Register holder_reg, |
| Register scratch, |
| Label* miss); |
| |
| |
| // --------------------------------------------------------------------------- |
| // Allocation support |
| |
| // Allocate an object in new space. If the new space is exhausted control |
| // continues at the gc_required label. The allocated object is returned in |
| // result and end of the new object is returned in result_end. The register |
| // scratch can be passed as no_reg in which case an additional object |
| // reference will be added to the reloc info. The returned pointers in result |
| // and result_end have not yet been tagged as heap objects. If |
| // result_contains_top_on_entry is true the content of result is known to be |
| // the allocation top on entry (could be result_end from a previous call to |
| // AllocateInNewSpace). If result_contains_top_on_entry is true scratch |
| // should be no_reg as it is never used. |
| void AllocateInNewSpace(int object_size, |
| Register result, |
| Register result_end, |
| Register scratch, |
| Label* gc_required, |
| AllocationFlags flags); |
| |
| void AllocateInNewSpace(int header_size, |
| ScaleFactor element_size, |
| Register element_count, |
| Register result, |
| Register result_end, |
| Register scratch, |
| Label* gc_required, |
| AllocationFlags flags); |
| |
| void AllocateInNewSpace(Register object_size, |
| Register result, |
| Register result_end, |
| Register scratch, |
| Label* gc_required, |
| AllocationFlags flags); |
| |
| // Undo allocation in new space. The object passed and objects allocated after |
| // it will no longer be allocated. Make sure that no pointers are left to the |
| // object(s) no longer allocated as they would be invalid when allocation is |
| // un-done. |
| void UndoAllocationInNewSpace(Register object); |
| |
| // Allocate a heap number in new space with undefined value. Returns |
| // tagged pointer in result register, or jumps to gc_required if new |
| // space is full. |
| void AllocateHeapNumber(Register result, |
| Register scratch, |
| Label* gc_required); |
| |
| // Allocate a sequential string. All the header fields of the string object |
| // are initialized. |
| 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); |
| |
| // Allocate a raw cons string object. Only the map field of the result is |
| // initialized. |
| void AllocateConsString(Register result, |
| Register scratch1, |
| Register scratch2, |
| Label* gc_required); |
| void AllocateAsciiConsString(Register result, |
| Register scratch1, |
| Register scratch2, |
| Label* gc_required); |
| |
| // --------------------------------------------------------------------------- |
| // Support functions. |
| |
| // Check if result is zero and op is negative. |
| void NegativeZeroTest(Register result, Register op, Label* then_label); |
| |
| // Check if result is zero and op is negative in code using jump targets. |
| void NegativeZeroTest(CodeGenerator* cgen, |
| Register result, |
| Register op, |
| JumpTarget* then_target); |
| |
| // Check if result is zero and any of op1 and op2 are negative. |
| // Register scratch is destroyed, and it must be different from op2. |
| void NegativeZeroTest(Register result, Register op1, Register op2, |
| Register scratch, Label* then_label); |
| |
| // 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 register may be |
| // clobbered. |
| void TryGetFunctionPrototype(Register function, |
| Register result, |
| Label* miss); |
| |
| // Generates code for reporting that an illegal operation has |
| // occurred. |
| void IllegalOperation(int num_arguments); |
| |
| // Find the function context up the context chain. |
| void LoadContext(Register dst, int context_chain_length); |
| |
| // --------------------------------------------------------------------------- |
| // Runtime calls |
| |
| // Call a code stub. |
| void CallStub(CodeStub* stub); |
| |
| // Tail call a code stub (jump). |
| void TailCallStub(CodeStub* stub); |
| |
| // Return from a code stub after popping its arguments. |
| void StubReturn(int argc); |
| |
| // Call a runtime routine. |
| // Eventually this should be used for all C calls. |
| void CallRuntime(Runtime::Function* f, int num_arguments); |
| |
| // Convenience function: Same as above, but takes the fid instead. |
| void CallRuntime(Runtime::FunctionId id, int num_arguments); |
| |
| // Convenience function: call an external reference. |
| void CallExternalReference(const ExternalReference& ext, |
| int num_arguments); |
| |
| // Tail call of a runtime routine (jump). |
| // Like JumpToRuntime, but also takes care of passing the number |
| // of arguments. |
| void TailCallRuntime(const ExternalReference& ext, |
| int num_arguments, |
| int result_size); |
| |
| // Jump to a runtime routine. |
| void JumpToRuntime(const ExternalReference& ext, int result_size); |
| |
| // Before calling a C-function from generated code, align arguments on stack. |
| // After aligning the frame, arguments must be stored in esp[0], esp[4], |
| // etc., not pushed. The argument count assumes all arguments are word sized. |
| // The number of slots reserved for arguments depends on platform. On Windows |
| // stack slots are reserved for the arguments passed in registers. On other |
| // platforms stack slots are only reserved for the arguments actually passed |
| // on the stack. |
| void PrepareCallCFunction(int num_arguments); |
| |
| // Calls a C function and cleans up the space for arguments allocated |
| // by PrepareCallCFunction. The called function is not allowed to trigger a |
| // garbage collection, since that might move the code and invalidate the |
| // return address (unless this is somehow accounted for by the called |
| // function). |
| void CallCFunction(ExternalReference function, int num_arguments); |
| void CallCFunction(Register function, int num_arguments); |
| |
| // Calculate the number of stack slots to reserve for arguments when calling a |
| // C function. |
| int ArgumentStackSlotsForCFunctionCall(int num_arguments); |
| |
| // --------------------------------------------------------------------------- |
| // Utilities |
| |
| void Ret(); |
| |
| Handle<Object> CodeObject() { return code_object_; } |
| |
| |
| // --------------------------------------------------------------------------- |
| // StatsCounter support |
| |
| void SetCounter(StatsCounter* counter, int value); |
| void IncrementCounter(StatsCounter* counter, int value); |
| void DecrementCounter(StatsCounter* counter, int value); |
| |
| |
| // --------------------------------------------------------------------------- |
| // Debugging |
| |
| // Calls Abort(msg) if the condition cc is not satisfied. |
| // Use --debug_code to enable. |
| void Assert(Condition cc, const char* msg); |
| |
| // Like Assert(), but always enabled. |
| void Check(Condition cc, const char* msg); |
| |
| // 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: |
| bool generating_stub_; |
| bool allow_stub_calls_; |
| // This handle will be patched with the code object on installation. |
| Handle<Object> code_object_; |
| |
| // Helper functions for generating invokes. |
| void InvokePrologue(const ParameterCount& expected, |
| const ParameterCount& actual, |
| Handle<Code> code_constant, |
| Register code_register, |
| Label* done, |
| InvokeFlag flag); |
| |
| // Activation support. |
| void EnterFrame(StackFrame::Type type); |
| void LeaveFrame(StackFrame::Type type); |
| |
| // Allocation support helpers. |
| void LoadAllocationTopHelper(Register result, |
| Register result_end, |
| Register scratch, |
| AllocationFlags flags); |
| void UpdateAllocationTopHelper(Register result_end, Register scratch); |
| }; |
| |
| |
| // 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. Is not legal to emit |
| // relocation information. If any of these constraints are violated it causes |
| // an assertion. |
| class CodePatcher { |
| public: |
| CodePatcher(byte* address, int size); |
| virtual ~CodePatcher(); |
| |
| // Macro assembler to emit code. |
| MacroAssembler* masm() { return &masm_; } |
| |
| private: |
| byte* address_; // The address of the code being patched. |
| int size_; // Number of bytes of the expected patch size. |
| MacroAssembler masm_; // Macro assembler used to generate the code. |
| }; |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Static helper functions. |
| |
| // Generate an Operand for loading a field from an object. |
| static inline Operand FieldOperand(Register object, int offset) { |
| return Operand(object, offset - kHeapObjectTag); |
| } |
| |
| |
| // Generate an Operand for loading an indexed field from an object. |
| static inline Operand FieldOperand(Register object, |
| Register index, |
| ScaleFactor scale, |
| int offset) { |
| return Operand(object, index, scale, offset - kHeapObjectTag); |
| } |
| |
| |
| #ifdef GENERATED_CODE_COVERAGE |
| extern void LogGeneratedCodeCoverage(const char* file_line); |
| #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) { \ |
| byte* x64_coverage_function = \ |
| reinterpret_cast<byte*>(FUNCTION_ADDR(LogGeneratedCodeCoverage)); \ |
| masm->pushfd(); \ |
| masm->pushad(); \ |
| masm->push(Immediate(reinterpret_cast<int>(&__FILE_LINE__))); \ |
| masm->call(x64_coverage_function, RelocInfo::RUNTIME_ENTRY); \ |
| masm->pop(rax); \ |
| masm->popad(); \ |
| masm->popfd(); \ |
| } \ |
| masm-> |
| #else |
| #define ACCESS_MASM(masm) masm-> |
| #endif |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_X64_MACRO_ASSEMBLER_X64_H_ |