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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_MACRO_ASSEMBLER_H_
#define V8_MACRO_ASSEMBLER_H_
// Helper types to make boolean flag easier to read at call-site.
enum InvokeFlag {
CALL_FUNCTION,
JUMP_FUNCTION
};
// Flags used for the AllocateInNewSpace functions.
enum AllocationFlags {
// No special flags.
NO_ALLOCATION_FLAGS = 0,
// Return the pointer to the allocated already tagged as a heap object.
TAG_OBJECT = 1 << 0,
// The content of the result register already contains the allocation top in
// new space.
RESULT_CONTAINS_TOP = 1 << 1,
// Specify that the requested size of the space to allocate is specified in
// words instead of bytes.
SIZE_IN_WORDS = 1 << 2,
// Align the allocation to a multiple of kDoubleSize
DOUBLE_ALIGNMENT = 1 << 3,
// Directly allocate in old pointer space
PRETENURE_OLD_POINTER_SPACE = 1 << 4,
// Directly allocate in old data space
PRETENURE_OLD_DATA_SPACE = 1 << 5
};
// Invalid depth in prototype chain.
const int kInvalidProtoDepth = -1;
#if V8_TARGET_ARCH_IA32
#include "src/assembler.h"
#include "src/ia32/assembler-ia32.h"
#include "src/ia32/assembler-ia32-inl.h"
#include "src/code.h" // must be after assembler_*.h
#include "src/ia32/macro-assembler-ia32.h"
#elif V8_TARGET_ARCH_X64
#include "src/assembler.h"
#include "src/x64/assembler-x64.h"
#include "src/x64/assembler-x64-inl.h"
#include "src/code.h" // must be after assembler_*.h
#include "src/x64/macro-assembler-x64.h"
#elif V8_TARGET_ARCH_ARM64
#include "src/arm64/constants-arm64.h"
#include "src/assembler.h"
#include "src/arm64/assembler-arm64.h"
#include "src/arm64/assembler-arm64-inl.h"
#include "src/code.h" // must be after assembler_*.h
#include "src/arm64/macro-assembler-arm64.h"
#include "src/arm64/macro-assembler-arm64-inl.h"
#elif V8_TARGET_ARCH_ARM
#include "src/arm/constants-arm.h"
#include "src/assembler.h"
#include "src/arm/assembler-arm.h"
#include "src/arm/assembler-arm-inl.h"
#include "src/code.h" // must be after assembler_*.h
#include "src/arm/macro-assembler-arm.h"
#elif V8_TARGET_ARCH_MIPS
#include "src/mips/constants-mips.h"
#include "src/assembler.h"
#include "src/mips/assembler-mips.h"
#include "src/mips/assembler-mips-inl.h"
#include "src/code.h" // must be after assembler_*.h
#include "src/mips/macro-assembler-mips.h"
#elif V8_TARGET_ARCH_X87
#include "src/assembler.h"
#include "src/x87/assembler-x87.h"
#include "src/x87/assembler-x87-inl.h"
#include "src/code.h" // must be after assembler_*.h
#include "src/x87/macro-assembler-x87.h"
#else
#error Unsupported target architecture.
#endif
namespace v8 {
namespace internal {
class FrameScope {
public:
explicit FrameScope(MacroAssembler* masm, StackFrame::Type type)
: masm_(masm), type_(type), old_has_frame_(masm->has_frame()) {
masm->set_has_frame(true);
if (type != StackFrame::MANUAL && type_ != StackFrame::NONE) {
masm->EnterFrame(type);
}
}
~FrameScope() {
if (type_ != StackFrame::MANUAL && type_ != StackFrame::NONE) {
masm_->LeaveFrame(type_);
}
masm_->set_has_frame(old_has_frame_);
}
// Normally we generate the leave-frame code when this object goes
// out of scope. Sometimes we may need to generate the code somewhere else
// in addition. Calling this will achieve that, but the object stays in
// scope, the MacroAssembler is still marked as being in a frame scope, and
// the code will be generated again when it goes out of scope.
void GenerateLeaveFrame() {
ASSERT(type_ != StackFrame::MANUAL && type_ != StackFrame::NONE);
masm_->LeaveFrame(type_);
}
private:
MacroAssembler* masm_;
StackFrame::Type type_;
bool old_has_frame_;
};
class AllowExternalCallThatCantCauseGC: public FrameScope {
public:
explicit AllowExternalCallThatCantCauseGC(MacroAssembler* masm)
: FrameScope(masm, StackFrame::NONE) { }
};
class NoCurrentFrameScope {
public:
explicit NoCurrentFrameScope(MacroAssembler* masm)
: masm_(masm), saved_(masm->has_frame()) {
masm->set_has_frame(false);
}
~NoCurrentFrameScope() {
masm_->set_has_frame(saved_);
}
private:
MacroAssembler* masm_;
bool saved_;
};
// Support for "structured" code comments.
#ifdef DEBUG
class Comment {
public:
Comment(MacroAssembler* masm, const char* msg);
~Comment();
private:
MacroAssembler* masm_;
const char* msg_;
};
#else
class Comment {
public:
Comment(MacroAssembler*, const char*) {}
};
#endif // DEBUG
class AllocationUtils {
public:
static ExternalReference GetAllocationTopReference(
Isolate* isolate, AllocationFlags flags) {
if ((flags & PRETENURE_OLD_POINTER_SPACE) != 0) {
return ExternalReference::old_pointer_space_allocation_top_address(
isolate);
} else if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) {
return ExternalReference::old_data_space_allocation_top_address(isolate);
}
return ExternalReference::new_space_allocation_top_address(isolate);
}
static ExternalReference GetAllocationLimitReference(
Isolate* isolate, AllocationFlags flags) {
if ((flags & PRETENURE_OLD_POINTER_SPACE) != 0) {
return ExternalReference::old_pointer_space_allocation_limit_address(
isolate);
} else if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) {
return ExternalReference::old_data_space_allocation_limit_address(
isolate);
}
return ExternalReference::new_space_allocation_limit_address(isolate);
}
};
} } // namespace v8::internal
#endif // V8_MACRO_ASSEMBLER_H_
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