5152d2e0da
Make instanceof work correctly. BUG=v8:893 Review URL: http://codereview.chromium.org/8199004 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9659 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
968 lines
39 KiB
C++
968 lines
39 KiB
C++
// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_IA32_MACRO_ASSEMBLER_IA32_H_
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#define V8_IA32_MACRO_ASSEMBLER_IA32_H_
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#include "assembler.h"
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#include "frames.h"
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#include "v8globals.h"
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namespace v8 {
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namespace internal {
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// Flags used for the AllocateInNewSpace functions.
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enum AllocationFlags {
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// No special flags.
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NO_ALLOCATION_FLAGS = 0,
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// Return the pointer to the allocated already tagged as a heap object.
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TAG_OBJECT = 1 << 0,
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// The content of the result register already contains the allocation top in
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// new space.
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RESULT_CONTAINS_TOP = 1 << 1
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};
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// Convenience for platform-independent signatures. We do not normally
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// distinguish memory operands from other operands on ia32.
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typedef Operand MemOperand;
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enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET };
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enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK };
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bool AreAliased(Register r1, Register r2, Register r3, Register r4);
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// MacroAssembler implements a collection of frequently used macros.
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class MacroAssembler: public Assembler {
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public:
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// The isolate parameter can be NULL if the macro assembler should
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// not use isolate-dependent functionality. In this case, it's the
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// responsibility of the caller to never invoke such function on the
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// macro assembler.
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MacroAssembler(Isolate* isolate, void* buffer, int size);
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// ---------------------------------------------------------------------------
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// GC Support
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enum RememberedSetFinalAction {
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kReturnAtEnd,
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kFallThroughAtEnd
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};
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// Record in the remembered set the fact that we have a pointer to new space
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// at the address pointed to by the addr register. Only works if addr is not
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// in new space.
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void RememberedSetHelper(Register object, // Used for debug code.
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Register addr,
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Register scratch,
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SaveFPRegsMode save_fp,
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RememberedSetFinalAction and_then);
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void CheckPageFlag(Register object,
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Register scratch,
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int mask,
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Condition cc,
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Label* condition_met,
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Label::Distance condition_met_distance = Label::kFar);
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// Check if object is in new space. Jumps if the object is not in new space.
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// The register scratch can be object itself, but scratch will be clobbered.
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void JumpIfNotInNewSpace(Register object,
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Register scratch,
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Label* branch,
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Label::Distance distance = Label::kFar) {
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InNewSpace(object, scratch, zero, branch, distance);
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}
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// Check if object is in new space. Jumps if the object is in new space.
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// The register scratch can be object itself, but it will be clobbered.
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void JumpIfInNewSpace(Register object,
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Register scratch,
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Label* branch,
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Label::Distance distance = Label::kFar) {
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InNewSpace(object, scratch, not_zero, branch, distance);
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}
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// Check if an object has a given incremental marking color. Also uses ecx!
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void HasColor(Register object,
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Register scratch0,
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Register scratch1,
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Label* has_color,
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Label::Distance has_color_distance,
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int first_bit,
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int second_bit);
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void JumpIfBlack(Register object,
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Register scratch0,
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Register scratch1,
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Label* on_black,
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Label::Distance on_black_distance = Label::kFar);
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// Checks the color of an object. If the object is already grey or black
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// then we just fall through, since it is already live. If it is white and
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// we can determine that it doesn't need to be scanned, then we just mark it
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// black and fall through. For the rest we jump to the label so the
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// incremental marker can fix its assumptions.
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void EnsureNotWhite(Register object,
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Register scratch1,
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Register scratch2,
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Label* object_is_white_and_not_data,
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Label::Distance distance);
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// Notify the garbage collector that we wrote a pointer into an object.
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// |object| is the object being stored into, |value| is the object being
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// stored. value and scratch registers are clobbered by the operation.
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// The offset is the offset from the start of the object, not the offset from
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// the tagged HeapObject pointer. For use with FieldOperand(reg, off).
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void RecordWriteField(
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Register object,
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int offset,
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Register value,
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Register scratch,
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SaveFPRegsMode save_fp,
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RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
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SmiCheck smi_check = INLINE_SMI_CHECK);
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// As above, but the offset has the tag presubtracted. For use with
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// Operand(reg, off).
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void RecordWriteContextSlot(
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Register context,
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int offset,
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Register value,
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Register scratch,
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SaveFPRegsMode save_fp,
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RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
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SmiCheck smi_check = INLINE_SMI_CHECK) {
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RecordWriteField(context,
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offset + kHeapObjectTag,
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value,
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scratch,
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save_fp,
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remembered_set_action,
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smi_check);
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}
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// Notify the garbage collector that we wrote a pointer into a fixed array.
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// |array| is the array being stored into, |value| is the
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// object being stored. |index| is the array index represented as a
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// Smi. All registers are clobbered by the operation RecordWriteArray
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// filters out smis so it does not update the write barrier if the
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// value is a smi.
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void RecordWriteArray(
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Register array,
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Register value,
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Register index,
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SaveFPRegsMode save_fp,
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RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
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SmiCheck smi_check = INLINE_SMI_CHECK);
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// For page containing |object| mark region covering |address|
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// dirty. |object| is the object being stored into, |value| is the
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// object being stored. The address and value registers are clobbered by the
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// operation. RecordWrite filters out smis so it does not update the
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// write barrier if the value is a smi.
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void RecordWrite(
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Register object,
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Register address,
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Register value,
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SaveFPRegsMode save_fp,
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RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
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SmiCheck smi_check = INLINE_SMI_CHECK);
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#ifdef ENABLE_DEBUGGER_SUPPORT
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// ---------------------------------------------------------------------------
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// Debugger Support
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void DebugBreak();
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#endif
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// Enter specific kind of exit frame. Expects the number of
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// arguments in register eax and sets up the number of arguments in
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// register edi and the pointer to the first argument in register
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// esi.
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void EnterExitFrame(bool save_doubles);
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void EnterApiExitFrame(int argc);
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// Leave the current exit frame. Expects the return value in
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// register eax:edx (untouched) and the pointer to the first
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// argument in register esi.
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void LeaveExitFrame(bool save_doubles);
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// Leave the current exit frame. Expects the return value in
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// register eax (untouched).
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void LeaveApiExitFrame();
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// Find the function context up the context chain.
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void LoadContext(Register dst, int context_chain_length);
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// Load the global function with the given index.
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void LoadGlobalFunction(int index, Register function);
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// Load the initial map from the global function. The registers
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// function and map can be the same.
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void LoadGlobalFunctionInitialMap(Register function, Register map);
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// Push and pop the registers that can hold pointers.
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void PushSafepointRegisters() { pushad(); }
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void PopSafepointRegisters() { popad(); }
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// Store the value in register/immediate src in the safepoint
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// register stack slot for register dst.
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void StoreToSafepointRegisterSlot(Register dst, Register src);
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void StoreToSafepointRegisterSlot(Register dst, Immediate src);
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void LoadFromSafepointRegisterSlot(Register dst, Register src);
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// ---------------------------------------------------------------------------
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// JavaScript invokes
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// Setup call kind marking in ecx. The method takes ecx as an
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// explicit first parameter to make the code more readable at the
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// call sites.
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void SetCallKind(Register dst, CallKind kind);
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// Invoke the JavaScript function code by either calling or jumping.
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void InvokeCode(Register code,
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const ParameterCount& expected,
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const ParameterCount& actual,
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InvokeFlag flag,
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const CallWrapper& call_wrapper,
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CallKind call_kind) {
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InvokeCode(Operand(code), expected, actual, flag, call_wrapper, call_kind);
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}
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void InvokeCode(const Operand& code,
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const ParameterCount& expected,
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const ParameterCount& actual,
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InvokeFlag flag,
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const CallWrapper& call_wrapper,
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CallKind call_kind);
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void InvokeCode(Handle<Code> code,
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const ParameterCount& expected,
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const ParameterCount& actual,
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RelocInfo::Mode rmode,
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InvokeFlag flag,
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const CallWrapper& call_wrapper,
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CallKind call_kind);
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// Invoke the JavaScript function in the given register. Changes the
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// current context to the context in the function before invoking.
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void InvokeFunction(Register function,
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const ParameterCount& actual,
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InvokeFlag flag,
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const CallWrapper& call_wrapper,
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CallKind call_kind);
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void InvokeFunction(JSFunction* function,
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const ParameterCount& actual,
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InvokeFlag flag,
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const CallWrapper& call_wrapper,
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CallKind call_kind);
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// Invoke specified builtin JavaScript function. Adds an entry to
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// the unresolved list if the name does not resolve.
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void InvokeBuiltin(Builtins::JavaScript id,
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InvokeFlag flag,
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const CallWrapper& call_wrapper = NullCallWrapper());
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// Store the function for the given builtin in the target register.
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void GetBuiltinFunction(Register target, Builtins::JavaScript id);
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// Store the code object for the given builtin in the target register.
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void GetBuiltinEntry(Register target, Builtins::JavaScript id);
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// Expression support
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void Set(Register dst, const Immediate& x);
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void Set(const Operand& dst, const Immediate& x);
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// Support for constant splitting.
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bool IsUnsafeImmediate(const Immediate& x);
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void SafeSet(Register dst, const Immediate& x);
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void SafePush(const Immediate& x);
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// Compare a register against a known root, e.g. undefined, null, true, ...
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void CompareRoot(Register with, Heap::RootListIndex index);
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// Compare object type for heap object.
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// Incoming register is heap_object and outgoing register is map.
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void CmpObjectType(Register heap_object, InstanceType type, Register map);
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// Compare instance type for map.
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void CmpInstanceType(Register map, InstanceType type);
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// Check if a map for a JSObject indicates that the object has fast elements.
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// Jump to the specified label if it does not.
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void CheckFastElements(Register map,
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Label* fail,
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Label::Distance distance = Label::kFar);
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// Check if a map for a JSObject indicates that the object can have both smi
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// and HeapObject elements. Jump to the specified label if it does not.
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void CheckFastObjectElements(Register map,
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Label* fail,
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Label::Distance distance = Label::kFar);
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// Check if a map for a JSObject indicates that the object has fast smi only
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// elements. Jump to the specified label if it does not.
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void CheckFastSmiOnlyElements(Register map,
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Label* fail,
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Label::Distance distance = Label::kFar);
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// Check to see if maybe_number can be stored as a double in
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// FastDoubleElements. If it can, store it at the index specified by key in
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// the FastDoubleElements array elements, otherwise jump to fail.
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void StoreNumberToDoubleElements(Register maybe_number,
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Register elements,
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Register key,
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Register scratch1,
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XMMRegister scratch2,
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Label* fail,
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bool specialize_for_processor);
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// Check if the map of an object is equal to a specified map and branch to
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// label if not. Skip the smi check if not required (object is known to be a
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// heap object)
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void CheckMap(Register obj,
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Handle<Map> map,
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Label* fail,
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SmiCheckType smi_check_type);
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// Check if the map of an object is equal to a specified map and branch to a
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// specified target if equal. Skip the smi check if not required (object is
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// known to be a heap object)
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void DispatchMap(Register obj,
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Handle<Map> map,
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Handle<Code> success,
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SmiCheckType smi_check_type);
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// Check if the object in register heap_object is a string. Afterwards the
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// register map contains the object map and the register instance_type
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// contains the instance_type. The registers map and instance_type can be the
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// same in which case it contains the instance type afterwards. Either of the
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// registers map and instance_type can be the same as heap_object.
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Condition IsObjectStringType(Register heap_object,
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Register map,
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Register instance_type);
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// Check if a heap object's type is in the JSObject range, not including
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// JSFunction. The object's map will be loaded in the map register.
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// Any or all of the three registers may be the same.
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// The contents of the scratch register will always be overwritten.
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void IsObjectJSObjectType(Register heap_object,
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Register map,
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Register scratch,
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Label* fail);
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// The contents of the scratch register will be overwritten.
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void IsInstanceJSObjectType(Register map, Register scratch, Label* fail);
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// FCmp is similar to integer cmp, but requires unsigned
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// jcc instructions (je, ja, jae, jb, jbe, je, and jz).
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void FCmp();
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void ClampUint8(Register reg);
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void ClampDoubleToUint8(XMMRegister input_reg,
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XMMRegister scratch_reg,
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Register result_reg);
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// Smi tagging support.
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void SmiTag(Register reg) {
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STATIC_ASSERT(kSmiTag == 0);
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STATIC_ASSERT(kSmiTagSize == 1);
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add(reg, reg);
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}
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void SmiUntag(Register reg) {
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sar(reg, kSmiTagSize);
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}
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// Modifies the register even if it does not contain a Smi!
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void SmiUntag(Register reg, Label* is_smi) {
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STATIC_ASSERT(kSmiTagSize == 1);
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sar(reg, kSmiTagSize);
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STATIC_ASSERT(kSmiTag == 0);
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j(not_carry, is_smi);
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}
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// Jump the register contains a smi.
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inline void JumpIfSmi(Register value,
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Label* smi_label,
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Label::Distance distance = Label::kFar) {
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test(value, Immediate(kSmiTagMask));
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j(zero, smi_label, distance);
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}
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// Jump if the operand is a smi.
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inline void JumpIfSmi(Operand value,
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Label* smi_label,
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Label::Distance distance = Label::kFar) {
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test(value, Immediate(kSmiTagMask));
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j(zero, smi_label, distance);
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}
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// Jump if register contain a non-smi.
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inline void JumpIfNotSmi(Register value,
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Label* not_smi_label,
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Label::Distance distance = Label::kFar) {
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test(value, Immediate(kSmiTagMask));
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j(not_zero, not_smi_label, distance);
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}
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void LoadInstanceDescriptors(Register map, Register descriptors);
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void LoadPowerOf2(XMMRegister dst, Register scratch, int power);
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// Abort execution if argument is not a number. Used in debug code.
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void AbortIfNotNumber(Register object);
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// Abort execution if argument is not a smi. Used in debug code.
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void AbortIfNotSmi(Register object);
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// Abort execution if argument is a smi. Used in debug code.
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void AbortIfSmi(Register object);
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// Abort execution if argument is a string. Used in debug code.
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void AbortIfNotString(Register object);
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// ---------------------------------------------------------------------------
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// Exception handling
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// Push a new try handler and link into try handler chain. The return
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// address must be pushed before calling this helper.
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void PushTryHandler(CodeLocation try_location, HandlerType type);
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// Unlink the stack handler on top of the stack from the try handler chain.
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void PopTryHandler();
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// Activate the top handler in the try hander chain.
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void Throw(Register value);
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void ThrowUncatchable(UncatchableExceptionType type, Register value);
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// ---------------------------------------------------------------------------
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// Inline caching support
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// Generate code for checking access rights - used for security checks
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// on access to global objects across environments. The holder register
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// is left untouched, but the scratch register is clobbered.
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void CheckAccessGlobalProxy(Register holder_reg,
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Register scratch,
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Label* miss);
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void LoadFromNumberDictionary(Label* miss,
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Register elements,
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Register key,
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Register r0,
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Register r1,
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Register r2,
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Register result);
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// ---------------------------------------------------------------------------
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// Allocation support
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// Allocate an object in new space. If the new space is exhausted control
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// continues at the gc_required label. The allocated object is returned in
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// result and end of the new object is returned in result_end. The register
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// scratch can be passed as no_reg in which case an additional object
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// reference will be added to the reloc info. The returned pointers in result
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// and result_end have not yet been tagged as heap objects. If
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// result_contains_top_on_entry is true the content of result is known to be
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// the allocation top on entry (could be result_end from a previous call to
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// AllocateInNewSpace). If result_contains_top_on_entry is true scratch
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// should be no_reg as it is never used.
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void AllocateInNewSpace(int object_size,
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Register result,
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Register result_end,
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Register scratch,
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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. The
|
|
// register scratch2 can be passed as no_reg; the others must be
|
|
// valid registers. Returns tagged pointer in result register, or
|
|
// jumps to gc_required if new space is full.
|
|
void AllocateHeapNumber(Register result,
|
|
Register scratch1,
|
|
Register scratch2,
|
|
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);
|
|
void AllocateAsciiString(Register result,
|
|
int length,
|
|
Register scratch1,
|
|
Register scratch2,
|
|
Label* gc_required);
|
|
|
|
// Allocate a raw cons string object. Only the map field of the result is
|
|
// initialized.
|
|
void AllocateTwoByteConsString(Register result,
|
|
Register scratch1,
|
|
Register scratch2,
|
|
Label* gc_required);
|
|
void AllocateAsciiConsString(Register result,
|
|
Register scratch1,
|
|
Register scratch2,
|
|
Label* gc_required);
|
|
|
|
// Allocate a raw sliced string object. Only the map field of the result is
|
|
// initialized.
|
|
void AllocateTwoByteSlicedString(Register result,
|
|
Register scratch1,
|
|
Register scratch2,
|
|
Label* gc_required);
|
|
void AllocateAsciiSlicedString(Register result,
|
|
Register scratch1,
|
|
Register scratch2,
|
|
Label* gc_required);
|
|
|
|
// Copy memory, byte-by-byte, from source to destination. Not optimized for
|
|
// long or aligned copies.
|
|
// The contents of index and scratch are destroyed.
|
|
void CopyBytes(Register source,
|
|
Register destination,
|
|
Register length,
|
|
Register scratch);
|
|
|
|
// Initialize fields with filler values. Fields starting at |start_offset|
|
|
// not including end_offset are overwritten with the value in |filler|. At
|
|
// the end the loop, |start_offset| takes the value of |end_offset|.
|
|
void InitializeFieldsWithFiller(Register start_offset,
|
|
Register end_offset,
|
|
Register filler);
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Support functions.
|
|
|
|
// Check a boolean-bit of a Smi field.
|
|
void BooleanBitTest(Register object, int field_offset, int bit_index);
|
|
|
|
// Check if result is zero and op is negative.
|
|
void NegativeZeroTest(Register result, Register op, Label* then_label);
|
|
|
|
// 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 registers may be
|
|
// clobbered.
|
|
void TryGetFunctionPrototype(Register function,
|
|
Register result,
|
|
Register scratch,
|
|
Label* miss,
|
|
bool miss_on_bound_function = false);
|
|
|
|
// Generates code for reporting that an illegal operation has
|
|
// occurred.
|
|
void IllegalOperation(int num_arguments);
|
|
|
|
// Picks out an array index from the hash field.
|
|
// Register use:
|
|
// hash - holds the index's hash. Clobbered.
|
|
// index - holds the overwritten index on exit.
|
|
void IndexFromHash(Register hash, Register index);
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Runtime calls
|
|
|
|
// Call a code stub. Generate the code if necessary.
|
|
void CallStub(CodeStub* stub, unsigned ast_id = kNoASTId);
|
|
|
|
// Call a code stub and return the code object called. Try to generate
|
|
// the code if necessary. Do not perform a GC but instead return a retry
|
|
// after GC failure.
|
|
MUST_USE_RESULT MaybeObject* TryCallStub(CodeStub* stub);
|
|
|
|
// Tail call a code stub (jump). Generate the code if necessary.
|
|
void TailCallStub(CodeStub* stub);
|
|
|
|
// Tail call a code stub (jump) and return the code object called. Try to
|
|
// generate the code if necessary. Do not perform a GC but instead return
|
|
// a retry after GC failure.
|
|
MUST_USE_RESULT MaybeObject* TryTailCallStub(CodeStub* stub);
|
|
|
|
// Return from a code stub after popping its arguments.
|
|
void StubReturn(int argc);
|
|
|
|
// Call a runtime routine.
|
|
void CallRuntime(const Runtime::Function* f, int num_arguments);
|
|
void CallRuntimeSaveDoubles(Runtime::FunctionId id);
|
|
|
|
// Call a runtime function, returning the CodeStub object called.
|
|
// Try to generate the stub code if necessary. Do not perform a GC
|
|
// but instead return a retry after GC failure.
|
|
MUST_USE_RESULT MaybeObject* TryCallRuntime(const 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: Same as above, but takes the fid instead.
|
|
MUST_USE_RESULT MaybeObject* TryCallRuntime(Runtime::FunctionId id,
|
|
int num_arguments);
|
|
|
|
// Convenience function: call an external reference.
|
|
void CallExternalReference(ExternalReference ref, 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);
|
|
|
|
// Tail call of a runtime routine (jump). Try to generate the code if
|
|
// necessary. Do not perform a GC but instead return a retry after GC failure.
|
|
MUST_USE_RESULT MaybeObject* TryTailCallExternalReference(
|
|
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);
|
|
|
|
// Convenience function: tail call a runtime routine (jump). Try to generate
|
|
// the code if necessary. Do not perform a GC but instead return a retry after
|
|
// GC failure.
|
|
MUST_USE_RESULT MaybeObject* TryTailCallRuntime(Runtime::FunctionId fid,
|
|
int num_arguments,
|
|
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.
|
|
// Some compilers/platforms require the stack to be aligned when calling
|
|
// C++ code.
|
|
// Needs a scratch register to do some arithmetic. This register will be
|
|
// trashed.
|
|
void PrepareCallCFunction(int num_arguments, Register scratch);
|
|
|
|
// 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);
|
|
|
|
// Prepares stack to put arguments (aligns and so on). Reserves
|
|
// space for return value if needed (assumes the return value is a handle).
|
|
// Arguments must be stored in ApiParameterOperand(0), ApiParameterOperand(1)
|
|
// etc. Saves context (esi). If space was reserved for return value then
|
|
// stores the pointer to the reserved slot into esi.
|
|
void PrepareCallApiFunction(int argc);
|
|
|
|
// Calls an API function. Allocates HandleScope, extracts
|
|
// returned value from handle and propagates exceptions.
|
|
// Clobbers ebx, edi and caller-save registers. Restores context.
|
|
// On return removes stack_space * kPointerSize (GCed).
|
|
MaybeObject* TryCallApiFunctionAndReturn(ApiFunction* function,
|
|
int stack_space);
|
|
|
|
// Jump to a runtime routine.
|
|
void JumpToExternalReference(const ExternalReference& ext);
|
|
|
|
MaybeObject* TryJumpToExternalReference(const ExternalReference& ext);
|
|
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Utilities
|
|
|
|
void Ret();
|
|
|
|
// Return and drop arguments from stack, where the number of arguments
|
|
// may be bigger than 2^16 - 1. Requires a scratch register.
|
|
void Ret(int bytes_dropped, Register scratch);
|
|
|
|
// Emit code to discard a non-negative number of pointer-sized elements
|
|
// from the stack, clobbering only the esp register.
|
|
void Drop(int element_count);
|
|
|
|
void Call(Label* target) { call(target); }
|
|
|
|
// Emit call to the code we are currently generating.
|
|
void CallSelf() {
|
|
Handle<Code> self(reinterpret_cast<Code**>(CodeObject().location()));
|
|
call(self, RelocInfo::CODE_TARGET);
|
|
}
|
|
|
|
// Move if the registers are not identical.
|
|
void Move(Register target, Register source);
|
|
|
|
void Move(Register target, Handle<Object> value);
|
|
|
|
// Push a handle value.
|
|
void Push(Handle<Object> handle) { push(handle); }
|
|
|
|
Handle<Object> CodeObject() {
|
|
ASSERT(!code_object_.is_null());
|
|
return code_object_;
|
|
}
|
|
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// StatsCounter support
|
|
|
|
void SetCounter(StatsCounter* counter, int value);
|
|
void IncrementCounter(StatsCounter* counter, int value);
|
|
void DecrementCounter(StatsCounter* counter, int value);
|
|
void IncrementCounter(Condition cc, StatsCounter* counter, int value);
|
|
void DecrementCounter(Condition cc, 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);
|
|
|
|
void AssertFastElements(Register elements);
|
|
|
|
// 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);
|
|
|
|
// Check that the stack is aligned.
|
|
void CheckStackAlignment();
|
|
|
|
// Verify restrictions about code generated in stubs.
|
|
void set_generating_stub(bool value) { generating_stub_ = value; }
|
|
bool generating_stub() { return generating_stub_; }
|
|
void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; }
|
|
bool allow_stub_calls() { return allow_stub_calls_; }
|
|
void set_has_frame(bool value) { has_frame_ = value; }
|
|
bool has_frame() { return has_frame_; }
|
|
inline bool AllowThisStubCall(CodeStub* stub);
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// String utilities.
|
|
|
|
// Check whether the instance type represents a flat ascii string. Jump to the
|
|
// label if not. If the instance type can be scratched specify same register
|
|
// for both instance type and scratch.
|
|
void JumpIfInstanceTypeIsNotSequentialAscii(Register instance_type,
|
|
Register scratch,
|
|
Label* on_not_flat_ascii_string);
|
|
|
|
// Checks if both objects are sequential ASCII strings, and jumps to label
|
|
// if either is not.
|
|
void JumpIfNotBothSequentialAsciiStrings(Register object1,
|
|
Register object2,
|
|
Register scratch1,
|
|
Register scratch2,
|
|
Label* on_not_flat_ascii_strings);
|
|
|
|
static int SafepointRegisterStackIndex(Register reg) {
|
|
return SafepointRegisterStackIndex(reg.code());
|
|
}
|
|
|
|
// Activation support.
|
|
void EnterFrame(StackFrame::Type type);
|
|
void LeaveFrame(StackFrame::Type type);
|
|
|
|
private:
|
|
bool generating_stub_;
|
|
bool allow_stub_calls_;
|
|
bool has_frame_;
|
|
// This handle will be patched with the code object on installation.
|
|
Handle<Object> code_object_;
|
|
|
|
// Helper functions for generating invokes.
|
|
void InvokePrologue(const ParameterCount& expected,
|
|
const ParameterCount& actual,
|
|
Handle<Code> code_constant,
|
|
const Operand& code_operand,
|
|
Label* done,
|
|
InvokeFlag flag,
|
|
Label::Distance done_distance,
|
|
const CallWrapper& call_wrapper = NullCallWrapper(),
|
|
CallKind call_kind = CALL_AS_METHOD);
|
|
|
|
void EnterExitFramePrologue();
|
|
void EnterExitFrameEpilogue(int argc, bool save_doubles);
|
|
|
|
void LeaveExitFrameEpilogue();
|
|
|
|
// Allocation support helpers.
|
|
void LoadAllocationTopHelper(Register result,
|
|
Register scratch,
|
|
AllocationFlags flags);
|
|
void UpdateAllocationTopHelper(Register result_end, Register scratch);
|
|
|
|
// Helper for PopHandleScope. Allowed to perform a GC and returns
|
|
// NULL if gc_allowed. Does not perform a GC if !gc_allowed, and
|
|
// possibly returns a failure object indicating an allocation failure.
|
|
MUST_USE_RESULT MaybeObject* PopHandleScopeHelper(Register saved,
|
|
Register scratch,
|
|
bool gc_allowed);
|
|
|
|
// Helper for implementing JumpIfNotInNewSpace and JumpIfInNewSpace.
|
|
void InNewSpace(Register object,
|
|
Register scratch,
|
|
Condition cc,
|
|
Label* condition_met,
|
|
Label::Distance condition_met_distance = Label::kFar);
|
|
|
|
// Helper for finding the mark bits for an address. Afterwards, the
|
|
// bitmap register points at the word with the mark bits and the mask
|
|
// the position of the first bit. Uses ecx as scratch and leaves addr_reg
|
|
// unchanged.
|
|
inline void GetMarkBits(Register addr_reg,
|
|
Register bitmap_reg,
|
|
Register mask_reg);
|
|
|
|
// Compute memory operands for safepoint stack slots.
|
|
Operand SafepointRegisterSlot(Register reg);
|
|
static int SafepointRegisterStackIndex(int reg_code);
|
|
|
|
// Needs access to SafepointRegisterStackIndex for optimized frame
|
|
// traversal.
|
|
friend class OptimizedFrame;
|
|
};
|
|
|
|
|
|
// 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);
|
|
}
|
|
|
|
|
|
static inline Operand ContextOperand(Register context, int index) {
|
|
return Operand(context, Context::SlotOffset(index));
|
|
}
|
|
|
|
|
|
static inline Operand GlobalObjectOperand() {
|
|
return ContextOperand(esi, Context::GLOBAL_INDEX);
|
|
}
|
|
|
|
|
|
// Generates an Operand for saving parameters after PrepareCallApiFunction.
|
|
Operand ApiParameterOperand(int index);
|
|
|
|
|
|
#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* ia32_coverage_function = \
|
|
reinterpret_cast<byte*>(FUNCTION_ADDR(LogGeneratedCodeCoverage)); \
|
|
masm->pushfd(); \
|
|
masm->pushad(); \
|
|
masm->push(Immediate(reinterpret_cast<int>(&__FILE_LINE__))); \
|
|
masm->call(ia32_coverage_function, RelocInfo::RUNTIME_ENTRY); \
|
|
masm->pop(eax); \
|
|
masm->popad(); \
|
|
masm->popfd(); \
|
|
} \
|
|
masm->
|
|
#else
|
|
#define ACCESS_MASM(masm) masm->
|
|
#endif
|
|
|
|
|
|
} } // namespace v8::internal
|
|
|
|
#endif // V8_IA32_MACRO_ASSEMBLER_IA32_H_
|