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3 // modification, are permitted provided that the following conditions are
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28 #ifndef V8_IA32_MACRO_ASSEMBLER_IA32_H_
29 #define V8_IA32_MACRO_ASSEMBLER_IA32_H_
31 #include "assembler.h"
33 #include "v8globals.h"
38 // Convenience for platform-independent signatures. We do not normally
39 // distinguish memory operands from other operands on ia32.
40 typedef Operand MemOperand;
42 enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET };
43 enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK };
46 enum RegisterValueType {
47 REGISTER_VALUE_IS_SMI,
48 REGISTER_VALUE_IS_INT32
52 bool AreAliased(Register r1, Register r2, Register r3, Register r4);
55 // MacroAssembler implements a collection of frequently used macros.
56 class MacroAssembler: public Assembler {
58 // The isolate parameter can be NULL if the macro assembler should
59 // not use isolate-dependent functionality. In this case, it's the
60 // responsibility of the caller to never invoke such function on the
62 MacroAssembler(Isolate* isolate, void* buffer, int size);
64 // Operations on roots in the root-array.
65 void LoadRoot(Register destination, Heap::RootListIndex index);
66 void StoreRoot(Register source, Register scratch, Heap::RootListIndex index);
67 void CompareRoot(Register with, Register scratch, Heap::RootListIndex index);
68 // These methods can only be used with constant roots (i.e. non-writable
69 // and not in new space).
70 void CompareRoot(Register with, Heap::RootListIndex index);
71 void CompareRoot(const Operand& with, Heap::RootListIndex index);
73 // ---------------------------------------------------------------------------
75 enum RememberedSetFinalAction {
80 // Record in the remembered set the fact that we have a pointer to new space
81 // at the address pointed to by the addr register. Only works if addr is not
83 void RememberedSetHelper(Register object, // Used for debug code.
86 SaveFPRegsMode save_fp,
87 RememberedSetFinalAction and_then);
89 void CheckPageFlag(Register object,
94 Label::Distance condition_met_distance = Label::kFar);
96 void CheckPageFlagForMap(
100 Label* condition_met,
101 Label::Distance condition_met_distance = Label::kFar);
103 void CheckMapDeprecated(Handle<Map> map,
105 Label* if_deprecated);
107 // Check if object is in new space. Jumps if the object is not in new space.
108 // The register scratch can be object itself, but scratch will be clobbered.
109 void JumpIfNotInNewSpace(Register object,
112 Label::Distance distance = Label::kFar) {
113 InNewSpace(object, scratch, zero, branch, distance);
116 // Check if object is in new space. Jumps if the object is in new space.
117 // The register scratch can be object itself, but it will be clobbered.
118 void JumpIfInNewSpace(Register object,
121 Label::Distance distance = Label::kFar) {
122 InNewSpace(object, scratch, not_zero, branch, distance);
125 // Check if an object has a given incremental marking color. Also uses ecx!
126 void HasColor(Register object,
130 Label::Distance has_color_distance,
134 void JumpIfBlack(Register object,
138 Label::Distance on_black_distance = Label::kFar);
140 // Checks the color of an object. If the object is already grey or black
141 // then we just fall through, since it is already live. If it is white and
142 // we can determine that it doesn't need to be scanned, then we just mark it
143 // black and fall through. For the rest we jump to the label so the
144 // incremental marker can fix its assumptions.
145 void EnsureNotWhite(Register object,
148 Label* object_is_white_and_not_data,
149 Label::Distance distance);
151 // Notify the garbage collector that we wrote a pointer into an object.
152 // |object| is the object being stored into, |value| is the object being
153 // stored. value and scratch registers are clobbered by the operation.
154 // The offset is the offset from the start of the object, not the offset from
155 // the tagged HeapObject pointer. For use with FieldOperand(reg, off).
156 void RecordWriteField(
161 SaveFPRegsMode save_fp,
162 RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
163 SmiCheck smi_check = INLINE_SMI_CHECK);
165 // As above, but the offset has the tag presubtracted. For use with
166 // Operand(reg, off).
167 void RecordWriteContextSlot(
172 SaveFPRegsMode save_fp,
173 RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
174 SmiCheck smi_check = INLINE_SMI_CHECK) {
175 RecordWriteField(context,
176 offset + kHeapObjectTag,
180 remembered_set_action,
184 // Notify the garbage collector that we wrote a pointer into a fixed array.
185 // |array| is the array being stored into, |value| is the
186 // object being stored. |index| is the array index represented as a
187 // Smi. All registers are clobbered by the operation RecordWriteArray
188 // filters out smis so it does not update the write barrier if the
190 void RecordWriteArray(
194 SaveFPRegsMode save_fp,
195 RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
196 SmiCheck smi_check = INLINE_SMI_CHECK);
198 // For page containing |object| mark region covering |address|
199 // dirty. |object| is the object being stored into, |value| is the
200 // object being stored. The address and value registers are clobbered by the
201 // operation. RecordWrite filters out smis so it does not update the
202 // write barrier if the value is a smi.
207 SaveFPRegsMode save_fp,
208 RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
209 SmiCheck smi_check = INLINE_SMI_CHECK);
211 // For page containing |object| mark the region covering the object's map
212 // dirty. |object| is the object being stored into, |map| is the Map object
214 void RecordWriteForMap(
219 SaveFPRegsMode save_fp);
221 #ifdef ENABLE_DEBUGGER_SUPPORT
222 // ---------------------------------------------------------------------------
228 // Enter specific kind of exit frame. Expects the number of
229 // arguments in register eax and sets up the number of arguments in
230 // register edi and the pointer to the first argument in register
232 void EnterExitFrame(bool save_doubles);
234 void EnterApiExitFrame(int argc);
236 // Leave the current exit frame. Expects the return value in
237 // register eax:edx (untouched) and the pointer to the first
238 // argument in register esi.
239 void LeaveExitFrame(bool save_doubles);
241 // Leave the current exit frame. Expects the return value in
242 // register eax (untouched).
243 void LeaveApiExitFrame();
245 // Find the function context up the context chain.
246 void LoadContext(Register dst, int context_chain_length);
248 // Conditionally load the cached Array transitioned map of type
249 // transitioned_kind from the native context if the map in register
250 // map_in_out is the cached Array map in the native context of
252 void LoadTransitionedArrayMapConditional(
253 ElementsKind expected_kind,
254 ElementsKind transitioned_kind,
257 Label* no_map_match);
259 // Load the initial map for new Arrays from a JSFunction.
260 void LoadInitialArrayMap(Register function_in,
263 bool can_have_holes);
265 void LoadGlobalContext(Register global_context);
267 // Load the global function with the given index.
268 void LoadGlobalFunction(int index, Register function);
270 // Load the initial map from the global function. The registers
271 // function and map can be the same.
272 void LoadGlobalFunctionInitialMap(Register function, Register map);
274 // Push and pop the registers that can hold pointers.
275 void PushSafepointRegisters() { pushad(); }
276 void PopSafepointRegisters() { popad(); }
277 // Store the value in register/immediate src in the safepoint
278 // register stack slot for register dst.
279 void StoreToSafepointRegisterSlot(Register dst, Register src);
280 void StoreToSafepointRegisterSlot(Register dst, Immediate src);
281 void LoadFromSafepointRegisterSlot(Register dst, Register src);
283 void LoadHeapObject(Register result, Handle<HeapObject> object);
284 void CmpHeapObject(Register reg, Handle<HeapObject> object);
285 void PushHeapObject(Handle<HeapObject> object);
287 void LoadObject(Register result, Handle<Object> object) {
288 AllowDeferredHandleDereference heap_object_check;
289 if (object->IsHeapObject()) {
290 LoadHeapObject(result, Handle<HeapObject>::cast(object));
292 Set(result, Immediate(object));
296 void CmpObject(Register reg, Handle<Object> object) {
297 AllowDeferredHandleDereference heap_object_check;
298 if (object->IsHeapObject()) {
299 CmpHeapObject(reg, Handle<HeapObject>::cast(object));
301 cmp(reg, Immediate(object));
305 // ---------------------------------------------------------------------------
306 // JavaScript invokes
308 // Set up call kind marking in ecx. The method takes ecx as an
309 // explicit first parameter to make the code more readable at the
311 void SetCallKind(Register dst, CallKind kind);
313 // Invoke the JavaScript function code by either calling or jumping.
314 void InvokeCode(Register code,
315 const ParameterCount& expected,
316 const ParameterCount& actual,
318 const CallWrapper& call_wrapper,
319 CallKind call_kind) {
320 InvokeCode(Operand(code), expected, actual, flag, call_wrapper, call_kind);
323 void InvokeCode(const Operand& code,
324 const ParameterCount& expected,
325 const ParameterCount& actual,
327 const CallWrapper& call_wrapper,
330 void InvokeCode(Handle<Code> code,
331 const ParameterCount& expected,
332 const ParameterCount& actual,
333 RelocInfo::Mode rmode,
335 const CallWrapper& call_wrapper,
338 // Invoke the JavaScript function in the given register. Changes the
339 // current context to the context in the function before invoking.
340 void InvokeFunction(Register function,
341 const ParameterCount& actual,
343 const CallWrapper& call_wrapper,
346 void InvokeFunction(Handle<JSFunction> function,
347 const ParameterCount& expected,
348 const ParameterCount& actual,
350 const CallWrapper& call_wrapper,
353 // Invoke specified builtin JavaScript function. Adds an entry to
354 // the unresolved list if the name does not resolve.
355 void InvokeBuiltin(Builtins::JavaScript id,
357 const CallWrapper& call_wrapper = NullCallWrapper());
359 // Store the function for the given builtin in the target register.
360 void GetBuiltinFunction(Register target, Builtins::JavaScript id);
362 // Store the code object for the given builtin in the target register.
363 void GetBuiltinEntry(Register target, Builtins::JavaScript id);
365 // Expression support
366 void Set(Register dst, const Immediate& x);
367 void Set(const Operand& dst, const Immediate& x);
369 // Support for constant splitting.
370 bool IsUnsafeImmediate(const Immediate& x);
371 void SafeSet(Register dst, const Immediate& x);
372 void SafePush(const Immediate& x);
374 // Compare object type for heap object.
375 // Incoming register is heap_object and outgoing register is map.
376 void CmpObjectType(Register heap_object, InstanceType type, Register map);
378 // Compare instance type for map.
379 void CmpInstanceType(Register map, InstanceType type);
381 // Check if a map for a JSObject indicates that the object has fast elements.
382 // Jump to the specified label if it does not.
383 void CheckFastElements(Register map,
385 Label::Distance distance = Label::kFar);
387 // Check if a map for a JSObject indicates that the object can have both smi
388 // and HeapObject elements. Jump to the specified label if it does not.
389 void CheckFastObjectElements(Register map,
391 Label::Distance distance = Label::kFar);
393 // Check if a map for a JSObject indicates that the object has fast smi only
394 // elements. Jump to the specified label if it does not.
395 void CheckFastSmiElements(Register map,
397 Label::Distance distance = Label::kFar);
399 // Check to see if maybe_number can be stored as a double in
400 // FastDoubleElements. If it can, store it at the index specified by key in
401 // the FastDoubleElements array elements, otherwise jump to fail.
402 void StoreNumberToDoubleElements(Register maybe_number,
406 XMMRegister scratch2,
408 bool specialize_for_processor,
411 // Compare an object's map with the specified map and its transitioned
412 // elements maps if mode is ALLOW_ELEMENT_TRANSITION_MAPS. FLAGS are set with
413 // result of map compare. If multiple map compares are required, the compare
414 // sequences branches to early_success.
415 void CompareMap(Register obj,
417 Label* early_success);
419 // Check if the map of an object is equal to a specified map and branch to
420 // label if not. Skip the smi check if not required (object is known to be a
421 // heap object). If mode is ALLOW_ELEMENT_TRANSITION_MAPS, then also match
422 // against maps that are ElementsKind transition maps of the specified map.
423 void CheckMap(Register obj,
426 SmiCheckType smi_check_type);
428 // Check if the map of an object is equal to a specified map and branch to a
429 // specified target if equal. Skip the smi check if not required (object is
430 // known to be a heap object)
431 void DispatchMap(Register obj,
434 Handle<Code> success,
435 SmiCheckType smi_check_type);
437 // Check if the object in register heap_object is a string. Afterwards the
438 // register map contains the object map and the register instance_type
439 // contains the instance_type. The registers map and instance_type can be the
440 // same in which case it contains the instance type afterwards. Either of the
441 // registers map and instance_type can be the same as heap_object.
442 Condition IsObjectStringType(Register heap_object,
444 Register instance_type);
446 // Check if the object in register heap_object is a name. Afterwards the
447 // register map contains the object map and the register instance_type
448 // contains the instance_type. The registers map and instance_type can be the
449 // same in which case it contains the instance type afterwards. Either of the
450 // registers map and instance_type can be the same as heap_object.
451 Condition IsObjectNameType(Register heap_object,
453 Register instance_type);
455 // Check if a heap object's type is in the JSObject range, not including
456 // JSFunction. The object's map will be loaded in the map register.
457 // Any or all of the three registers may be the same.
458 // The contents of the scratch register will always be overwritten.
459 void IsObjectJSObjectType(Register heap_object,
464 // The contents of the scratch register will be overwritten.
465 void IsInstanceJSObjectType(Register map, Register scratch, Label* fail);
467 // FCmp is similar to integer cmp, but requires unsigned
468 // jcc instructions (je, ja, jae, jb, jbe, je, and jz).
471 void ClampUint8(Register reg);
473 void ClampDoubleToUint8(XMMRegister input_reg,
474 XMMRegister scratch_reg,
475 Register result_reg);
477 void SlowTruncateToI(Register result_reg, Register input_reg,
478 int offset = HeapNumber::kValueOffset - kHeapObjectTag);
480 void TruncateHeapNumberToI(Register result_reg, Register input_reg);
481 void TruncateDoubleToI(Register result_reg, XMMRegister input_reg);
482 void TruncateX87TOSToI(Register result_reg);
484 void DoubleToI(Register result_reg, XMMRegister input_reg,
485 XMMRegister scratch, MinusZeroMode minus_zero_mode,
486 Label* conversion_failed, Label::Distance dst = Label::kFar);
487 void X87TOSToI(Register result_reg, MinusZeroMode minus_zero_mode,
488 Label* conversion_failed, Label::Distance dst = Label::kFar);
490 void TaggedToI(Register result_reg, Register input_reg, XMMRegister temp,
491 MinusZeroMode minus_zero_mode, Label* lost_precision);
493 // Smi tagging support.
494 void SmiTag(Register reg) {
495 STATIC_ASSERT(kSmiTag == 0);
496 STATIC_ASSERT(kSmiTagSize == 1);
499 void SmiUntag(Register reg) {
500 sar(reg, kSmiTagSize);
503 // Modifies the register even if it does not contain a Smi!
504 void SmiUntag(Register reg, Label* is_smi) {
505 STATIC_ASSERT(kSmiTagSize == 1);
506 sar(reg, kSmiTagSize);
507 STATIC_ASSERT(kSmiTag == 0);
508 j(not_carry, is_smi);
511 void LoadUint32(XMMRegister dst, Register src, XMMRegister scratch);
513 // Jump the register contains a smi.
514 inline void JumpIfSmi(Register value,
516 Label::Distance distance = Label::kFar) {
517 test(value, Immediate(kSmiTagMask));
518 j(zero, smi_label, distance);
520 // Jump if the operand is a smi.
521 inline void JumpIfSmi(Operand value,
523 Label::Distance distance = Label::kFar) {
524 test(value, Immediate(kSmiTagMask));
525 j(zero, smi_label, distance);
527 // Jump if register contain a non-smi.
528 inline void JumpIfNotSmi(Register value,
529 Label* not_smi_label,
530 Label::Distance distance = Label::kFar) {
531 test(value, Immediate(kSmiTagMask));
532 j(not_zero, not_smi_label, distance);
535 void LoadInstanceDescriptors(Register map, Register descriptors);
536 void EnumLength(Register dst, Register map);
537 void NumberOfOwnDescriptors(Register dst, Register map);
539 template<typename Field>
540 void DecodeField(Register reg) {
541 static const int shift = Field::kShift;
542 static const int mask = (Field::kMask >> Field::kShift) << kSmiTagSize;
544 and_(reg, Immediate(mask));
546 void LoadPowerOf2(XMMRegister dst, Register scratch, int power);
548 // Abort execution if argument is not a number, enabled via --debug-code.
549 void AssertNumber(Register object);
551 // Abort execution if argument is not a smi, enabled via --debug-code.
552 void AssertSmi(Register object);
554 // Abort execution if argument is a smi, enabled via --debug-code.
555 void AssertNotSmi(Register object);
557 // Abort execution if argument is not a string, enabled via --debug-code.
558 void AssertString(Register object);
560 // Abort execution if argument is not a name, enabled via --debug-code.
561 void AssertName(Register object);
563 // ---------------------------------------------------------------------------
564 // Exception handling
566 // Push a new try handler and link it into try handler chain.
567 void PushTryHandler(StackHandler::Kind kind, int handler_index);
569 // Unlink the stack handler on top of the stack from the try handler chain.
570 void PopTryHandler();
572 // Throw to the top handler in the try hander chain.
573 void Throw(Register value);
575 // Throw past all JS frames to the top JS entry frame.
576 void ThrowUncatchable(Register value);
578 // ---------------------------------------------------------------------------
579 // Inline caching support
581 // Generate code for checking access rights - used for security checks
582 // on access to global objects across environments. The holder register
583 // is left untouched, but the scratch register is clobbered.
584 void CheckAccessGlobalProxy(Register holder_reg,
589 void GetNumberHash(Register r0, Register scratch);
591 void LoadFromNumberDictionary(Label* miss,
600 // ---------------------------------------------------------------------------
601 // Allocation support
603 // Allocate an object in new space or old pointer space. If the given space
604 // is exhausted control continues at the gc_required label. The allocated
605 // object is returned in result and end of the new object is returned in
606 // result_end. The register scratch can be passed as no_reg in which case
607 // an additional object reference will be added to the reloc info. The
608 // returned pointers in result and result_end have not yet been tagged as
609 // heap objects. If result_contains_top_on_entry is true the content of
610 // result is known to be the allocation top on entry (could be result_end
611 // from a previous call). If result_contains_top_on_entry is true scratch
612 // should be no_reg as it is never used.
613 void Allocate(int object_size,
618 AllocationFlags flags);
620 void Allocate(int header_size,
621 ScaleFactor element_size,
622 Register element_count,
623 RegisterValueType element_count_type,
628 AllocationFlags flags);
630 void Allocate(Register object_size,
635 AllocationFlags flags);
637 // Undo allocation in new space. The object passed and objects allocated after
638 // it will no longer be allocated. Make sure that no pointers are left to the
639 // object(s) no longer allocated as they would be invalid when allocation is
641 void UndoAllocationInNewSpace(Register object);
643 // Allocate a heap number in new space with undefined value. The
644 // register scratch2 can be passed as no_reg; the others must be
645 // valid registers. Returns tagged pointer in result register, or
646 // jumps to gc_required if new space is full.
647 void AllocateHeapNumber(Register result,
652 // Allocate a sequential string. All the header fields of the string object
654 void AllocateTwoByteString(Register result,
660 void AllocateAsciiString(Register result,
666 void AllocateAsciiString(Register result,
672 // Allocate a raw cons string object. Only the map field of the result is
674 void AllocateTwoByteConsString(Register result,
678 void AllocateAsciiConsString(Register result,
683 // Allocate a raw sliced string object. Only the map field of the result is
685 void AllocateTwoByteSlicedString(Register result,
689 void AllocateAsciiSlicedString(Register result,
694 // Copy memory, byte-by-byte, from source to destination. Not optimized for
695 // long or aligned copies.
696 // The contents of index and scratch are destroyed.
697 void CopyBytes(Register source,
698 Register destination,
702 // Initialize fields with filler values. Fields starting at |start_offset|
703 // not including end_offset are overwritten with the value in |filler|. At
704 // the end the loop, |start_offset| takes the value of |end_offset|.
705 void InitializeFieldsWithFiller(Register start_offset,
709 // ---------------------------------------------------------------------------
710 // Support functions.
712 // Check a boolean-bit of a Smi field.
713 void BooleanBitTest(Register object, int field_offset, int bit_index);
715 // Check if result is zero and op is negative.
716 void NegativeZeroTest(Register result, Register op, Label* then_label);
718 // Check if result is zero and any of op1 and op2 are negative.
719 // Register scratch is destroyed, and it must be different from op2.
720 void NegativeZeroTest(Register result, Register op1, Register op2,
721 Register scratch, Label* then_label);
723 // Try to get function prototype of a function and puts the value in
724 // the result register. Checks that the function really is a
725 // function and jumps to the miss label if the fast checks fail. The
726 // function register will be untouched; the other registers may be
728 void TryGetFunctionPrototype(Register function,
732 bool miss_on_bound_function = false);
734 // Generates code for reporting that an illegal operation has
736 void IllegalOperation(int num_arguments);
738 // Picks out an array index from the hash field.
740 // hash - holds the index's hash. Clobbered.
741 // index - holds the overwritten index on exit.
742 void IndexFromHash(Register hash, Register index);
744 // ---------------------------------------------------------------------------
747 // Call a code stub. Generate the code if necessary.
748 void CallStub(CodeStub* stub, TypeFeedbackId ast_id = TypeFeedbackId::None());
750 // Tail call a code stub (jump). Generate the code if necessary.
751 void TailCallStub(CodeStub* stub);
753 // Return from a code stub after popping its arguments.
754 void StubReturn(int argc);
756 // Call a runtime routine.
757 void CallRuntime(const Runtime::Function* f, int num_arguments);
758 void CallRuntimeSaveDoubles(Runtime::FunctionId id);
760 // Convenience function: Same as above, but takes the fid instead.
761 void CallRuntime(Runtime::FunctionId id, int num_arguments);
763 // Convenience function: call an external reference.
764 void CallExternalReference(ExternalReference ref, int num_arguments);
766 // Tail call of a runtime routine (jump).
767 // Like JumpToExternalReference, but also takes care of passing the number
769 void TailCallExternalReference(const ExternalReference& ext,
773 // Convenience function: tail call a runtime routine (jump).
774 void TailCallRuntime(Runtime::FunctionId fid,
778 // Before calling a C-function from generated code, align arguments on stack.
779 // After aligning the frame, arguments must be stored in esp[0], esp[4],
780 // etc., not pushed. The argument count assumes all arguments are word sized.
781 // Some compilers/platforms require the stack to be aligned when calling
783 // Needs a scratch register to do some arithmetic. This register will be
785 void PrepareCallCFunction(int num_arguments, Register scratch);
787 // Calls a C function and cleans up the space for arguments allocated
788 // by PrepareCallCFunction. The called function is not allowed to trigger a
789 // garbage collection, since that might move the code and invalidate the
790 // return address (unless this is somehow accounted for by the called
792 void CallCFunction(ExternalReference function, int num_arguments);
793 void CallCFunction(Register function, int num_arguments);
795 // Prepares stack to put arguments (aligns and so on). Reserves
796 // space for return value if needed (assumes the return value is a handle).
797 // Arguments must be stored in ApiParameterOperand(0), ApiParameterOperand(1)
798 // etc. Saves context (esi). If space was reserved for return value then
799 // stores the pointer to the reserved slot into esi.
800 void PrepareCallApiFunction(int argc);
802 // Calls an API function. Allocates HandleScope, extracts returned value
803 // from handle and propagates exceptions. Clobbers ebx, edi and
804 // caller-save registers. Restores context. On return removes
805 // stack_space * kPointerSize (GCed).
806 void CallApiFunctionAndReturn(Address function_address,
807 Address thunk_address,
808 Operand thunk_last_arg,
810 int return_value_offset_from_ebp);
812 // Jump to a runtime routine.
813 void JumpToExternalReference(const ExternalReference& ext);
815 // ---------------------------------------------------------------------------
820 // Return and drop arguments from stack, where the number of arguments
821 // may be bigger than 2^16 - 1. Requires a scratch register.
822 void Ret(int bytes_dropped, Register scratch);
824 // Emit code to discard a non-negative number of pointer-sized elements
825 // from the stack, clobbering only the esp register.
826 void Drop(int element_count);
828 void Call(Label* target) { call(target); }
829 void Push(Register src) { push(src); }
830 void Pop(Register dst) { pop(dst); }
832 // Emit call to the code we are currently generating.
834 Handle<Code> self(reinterpret_cast<Code**>(CodeObject().location()));
835 call(self, RelocInfo::CODE_TARGET);
838 // Move if the registers are not identical.
839 void Move(Register target, Register source);
841 // Push a handle value.
842 void Push(Handle<Object> handle) { push(Immediate(handle)); }
843 void Push(Smi* smi) { Push(Handle<Smi>(smi, isolate())); }
845 Handle<Object> CodeObject() {
846 ASSERT(!code_object_.is_null());
850 // Insert code to verify that the x87 stack has the specified depth (0-7)
851 void VerifyX87StackDepth(uint32_t depth);
853 // ---------------------------------------------------------------------------
854 // StatsCounter support
856 void SetCounter(StatsCounter* counter, int value);
857 void IncrementCounter(StatsCounter* counter, int value);
858 void DecrementCounter(StatsCounter* counter, int value);
859 void IncrementCounter(Condition cc, StatsCounter* counter, int value);
860 void DecrementCounter(Condition cc, StatsCounter* counter, int value);
863 // ---------------------------------------------------------------------------
866 // Calls Abort(msg) if the condition cc is not satisfied.
867 // Use --debug_code to enable.
868 void Assert(Condition cc, BailoutReason reason);
870 void AssertFastElements(Register elements);
872 // Like Assert(), but always enabled.
873 void Check(Condition cc, BailoutReason reason);
875 // Print a message to stdout and abort execution.
876 void Abort(BailoutReason reason);
878 // Check that the stack is aligned.
879 void CheckStackAlignment();
881 // Verify restrictions about code generated in stubs.
882 void set_generating_stub(bool value) { generating_stub_ = value; }
883 bool generating_stub() { return generating_stub_; }
884 void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; }
885 bool allow_stub_calls() { return allow_stub_calls_; }
886 void set_has_frame(bool value) { has_frame_ = value; }
887 bool has_frame() { return has_frame_; }
888 inline bool AllowThisStubCall(CodeStub* stub);
890 // ---------------------------------------------------------------------------
893 // Check whether the instance type represents a flat ASCII string. Jump to the
894 // label if not. If the instance type can be scratched specify same register
895 // for both instance type and scratch.
896 void JumpIfInstanceTypeIsNotSequentialAscii(Register instance_type,
898 Label* on_not_flat_ascii_string);
900 // Checks if both objects are sequential ASCII strings, and jumps to label
902 void JumpIfNotBothSequentialAsciiStrings(Register object1,
906 Label* on_not_flat_ascii_strings);
908 // Checks if the given register or operand is a unique name
909 void JumpIfNotUniqueName(Register reg, Label* not_unique_name,
910 Label::Distance distance = Label::kFar) {
911 JumpIfNotUniqueName(Operand(reg), not_unique_name, distance);
914 void JumpIfNotUniqueName(Operand operand, Label* not_unique_name,
915 Label::Distance distance = Label::kFar);
917 static int SafepointRegisterStackIndex(Register reg) {
918 return SafepointRegisterStackIndex(reg.code());
921 // Activation support.
922 void EnterFrame(StackFrame::Type type);
923 void LeaveFrame(StackFrame::Type type);
925 // Expects object in eax and returns map with validated enum cache
926 // in eax. Assumes that any other register can be used as a scratch.
927 void CheckEnumCache(Label* call_runtime);
929 // AllocationMemento support. Arrays may have an associated
930 // AllocationMemento object that can be checked for in order to pretransition
932 // On entry, receiver_reg should point to the array object.
933 // scratch_reg gets clobbered.
934 // If allocation info is present, conditional code is set to equal
935 void TestJSArrayForAllocationMemento(Register receiver_reg,
936 Register scratch_reg);
939 bool generating_stub_;
940 bool allow_stub_calls_;
942 // This handle will be patched with the code object on installation.
943 Handle<Object> code_object_;
945 // Helper functions for generating invokes.
946 void InvokePrologue(const ParameterCount& expected,
947 const ParameterCount& actual,
948 Handle<Code> code_constant,
949 const Operand& code_operand,
951 bool* definitely_mismatches,
953 Label::Distance done_distance,
954 const CallWrapper& call_wrapper = NullCallWrapper(),
955 CallKind call_kind = CALL_AS_METHOD);
957 void EnterExitFramePrologue();
958 void EnterExitFrameEpilogue(int argc, bool save_doubles);
960 void LeaveExitFrameEpilogue();
962 // Allocation support helpers.
963 void LoadAllocationTopHelper(Register result,
965 AllocationFlags flags);
967 void UpdateAllocationTopHelper(Register result_end,
969 AllocationFlags flags);
971 // Helper for PopHandleScope. Allowed to perform a GC and returns
972 // NULL if gc_allowed. Does not perform a GC if !gc_allowed, and
973 // possibly returns a failure object indicating an allocation failure.
974 MUST_USE_RESULT MaybeObject* PopHandleScopeHelper(Register saved,
978 // Helper for implementing JumpIfNotInNewSpace and JumpIfInNewSpace.
979 void InNewSpace(Register object,
982 Label* condition_met,
983 Label::Distance condition_met_distance = Label::kFar);
985 // Helper for finding the mark bits for an address. Afterwards, the
986 // bitmap register points at the word with the mark bits and the mask
987 // the position of the first bit. Uses ecx as scratch and leaves addr_reg
989 inline void GetMarkBits(Register addr_reg,
993 // Helper for throwing exceptions. Compute a handler address and jump to
994 // it. See the implementation for register usage.
995 void JumpToHandlerEntry();
997 // Compute memory operands for safepoint stack slots.
998 Operand SafepointRegisterSlot(Register reg);
999 static int SafepointRegisterStackIndex(int reg_code);
1001 // Needs access to SafepointRegisterStackIndex for compiled frame
1003 friend class StandardFrame;
1007 // The code patcher is used to patch (typically) small parts of code e.g. for
1008 // debugging and other types of instrumentation. When using the code patcher
1009 // the exact number of bytes specified must be emitted. Is not legal to emit
1010 // relocation information. If any of these constraints are violated it causes
1014 CodePatcher(byte* address, int size);
1015 virtual ~CodePatcher();
1017 // Macro assembler to emit code.
1018 MacroAssembler* masm() { return &masm_; }
1021 byte* address_; // The address of the code being patched.
1022 int size_; // Number of bytes of the expected patch size.
1023 MacroAssembler masm_; // Macro assembler used to generate the code.
1027 // -----------------------------------------------------------------------------
1028 // Static helper functions.
1030 // Generate an Operand for loading a field from an object.
1031 inline Operand FieldOperand(Register object, int offset) {
1032 return Operand(object, offset - kHeapObjectTag);
1036 // Generate an Operand for loading an indexed field from an object.
1037 inline Operand FieldOperand(Register object,
1041 return Operand(object, index, scale, offset - kHeapObjectTag);
1045 inline Operand ContextOperand(Register context, int index) {
1046 return Operand(context, Context::SlotOffset(index));
1050 inline Operand GlobalObjectOperand() {
1051 return ContextOperand(esi, Context::GLOBAL_OBJECT_INDEX);
1055 // Generates an Operand for saving parameters after PrepareCallApiFunction.
1056 Operand ApiParameterOperand(int index);
1059 #ifdef GENERATED_CODE_COVERAGE
1060 extern void LogGeneratedCodeCoverage(const char* file_line);
1061 #define CODE_COVERAGE_STRINGIFY(x) #x
1062 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
1063 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
1064 #define ACCESS_MASM(masm) { \
1065 byte* ia32_coverage_function = \
1066 reinterpret_cast<byte*>(FUNCTION_ADDR(LogGeneratedCodeCoverage)); \
1069 masm->push(Immediate(reinterpret_cast<int>(&__FILE_LINE__))); \
1070 masm->call(ia32_coverage_function, RelocInfo::RUNTIME_ENTRY); \
1077 #define ACCESS_MASM(masm) masm->
1081 } } // namespace v8::internal
1083 #endif // V8_IA32_MACRO_ASSEMBLER_IA32_H_