mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
290 lines
8.2 KiB
290 lines
8.2 KiB
// 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_
|
|
|
|
#include "src/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,
|
|
// The content of the result register already contains the allocation top in
|
|
// new space.
|
|
RESULT_CONTAINS_TOP = 1 << 0,
|
|
// Specify that the requested size of the space to allocate is specified in
|
|
// words instead of bytes.
|
|
SIZE_IN_WORDS = 1 << 1,
|
|
// Align the allocation to a multiple of kDoubleSize
|
|
DOUBLE_ALIGNMENT = 1 << 2,
|
|
// Directly allocate in old space
|
|
PRETENURE = 1 << 3,
|
|
// Allocation folding dominator
|
|
ALLOCATION_FOLDING_DOMINATOR = 1 << 4,
|
|
// Folded allocation
|
|
ALLOCATION_FOLDED = 1 << 5
|
|
};
|
|
|
|
#if V8_TARGET_ARCH_IA32
|
|
#include "src/ia32/assembler-ia32.h"
|
|
#include "src/ia32/assembler-ia32-inl.h"
|
|
#include "src/ia32/macro-assembler-ia32.h"
|
|
#elif V8_TARGET_ARCH_X64
|
|
#include "src/x64/assembler-x64.h"
|
|
#include "src/x64/assembler-x64-inl.h"
|
|
#include "src/x64/macro-assembler-x64.h"
|
|
#elif V8_TARGET_ARCH_ARM64
|
|
#include "src/arm64/assembler-arm64.h"
|
|
#include "src/arm64/assembler-arm64-inl.h"
|
|
#include "src/arm64/constants-arm64.h"
|
|
#include "src/arm64/macro-assembler-arm64.h"
|
|
#include "src/arm64/macro-assembler-arm64-inl.h"
|
|
#elif V8_TARGET_ARCH_ARM
|
|
#include "src/arm/assembler-arm.h"
|
|
#include "src/arm/assembler-arm-inl.h"
|
|
#include "src/arm/constants-arm.h"
|
|
#include "src/arm/macro-assembler-arm.h"
|
|
#elif V8_TARGET_ARCH_PPC
|
|
#include "src/ppc/assembler-ppc.h"
|
|
#include "src/ppc/assembler-ppc-inl.h"
|
|
#include "src/ppc/constants-ppc.h"
|
|
#include "src/ppc/macro-assembler-ppc.h"
|
|
#elif V8_TARGET_ARCH_MIPS
|
|
#include "src/mips/assembler-mips.h"
|
|
#include "src/mips/assembler-mips-inl.h"
|
|
#include "src/mips/constants-mips.h"
|
|
#include "src/mips/macro-assembler-mips.h"
|
|
#elif V8_TARGET_ARCH_MIPS64
|
|
#include "src/mips64/assembler-mips64.h"
|
|
#include "src/mips64/assembler-mips64-inl.h"
|
|
#include "src/mips64/constants-mips64.h"
|
|
#include "src/mips64/macro-assembler-mips64.h"
|
|
#elif V8_TARGET_ARCH_S390
|
|
#include "src/s390/assembler-s390.h"
|
|
#include "src/s390/assembler-s390-inl.h"
|
|
#include "src/s390/constants-s390.h"
|
|
#include "src/s390/macro-assembler-s390.h"
|
|
#elif V8_TARGET_ARCH_X87
|
|
#include "src/x87/assembler-x87.h"
|
|
#include "src/x87/assembler-x87-inl.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() {
|
|
DCHECK(type_ != StackFrame::MANUAL && type_ != StackFrame::NONE);
|
|
masm_->LeaveFrame(type_);
|
|
}
|
|
|
|
private:
|
|
MacroAssembler* masm_;
|
|
StackFrame::Type type_;
|
|
bool old_has_frame_;
|
|
};
|
|
|
|
class FrameAndConstantPoolScope {
|
|
public:
|
|
FrameAndConstantPoolScope(MacroAssembler* masm, StackFrame::Type type)
|
|
: masm_(masm),
|
|
type_(type),
|
|
old_has_frame_(masm->has_frame()),
|
|
old_constant_pool_available_(FLAG_enable_embedded_constant_pool &&
|
|
masm->is_constant_pool_available()) {
|
|
masm->set_has_frame(true);
|
|
if (FLAG_enable_embedded_constant_pool) {
|
|
masm->set_constant_pool_available(true);
|
|
}
|
|
if (type_ != StackFrame::MANUAL && type_ != StackFrame::NONE) {
|
|
masm->EnterFrame(type, !old_constant_pool_available_);
|
|
}
|
|
}
|
|
|
|
~FrameAndConstantPoolScope() {
|
|
masm_->LeaveFrame(type_);
|
|
masm_->set_has_frame(old_has_frame_);
|
|
if (FLAG_enable_embedded_constant_pool) {
|
|
masm_->set_constant_pool_available(old_constant_pool_available_);
|
|
}
|
|
}
|
|
|
|
// 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() {
|
|
DCHECK(type_ != StackFrame::MANUAL && type_ != StackFrame::NONE);
|
|
masm_->LeaveFrame(type_);
|
|
}
|
|
|
|
private:
|
|
MacroAssembler* masm_;
|
|
StackFrame::Type type_;
|
|
bool old_has_frame_;
|
|
bool old_constant_pool_available_;
|
|
|
|
DISALLOW_IMPLICIT_CONSTRUCTORS(FrameAndConstantPoolScope);
|
|
};
|
|
|
|
// Class for scoping the the unavailability of constant pool access.
|
|
class ConstantPoolUnavailableScope {
|
|
public:
|
|
explicit ConstantPoolUnavailableScope(MacroAssembler* masm)
|
|
: masm_(masm),
|
|
old_constant_pool_available_(FLAG_enable_embedded_constant_pool &&
|
|
masm->is_constant_pool_available()) {
|
|
if (FLAG_enable_embedded_constant_pool) {
|
|
masm_->set_constant_pool_available(false);
|
|
}
|
|
}
|
|
~ConstantPoolUnavailableScope() {
|
|
if (FLAG_enable_embedded_constant_pool) {
|
|
masm_->set_constant_pool_available(old_constant_pool_available_);
|
|
}
|
|
}
|
|
|
|
private:
|
|
MacroAssembler* masm_;
|
|
int old_constant_pool_available_;
|
|
|
|
DISALLOW_IMPLICIT_CONSTRUCTORS(ConstantPoolUnavailableScope);
|
|
};
|
|
|
|
|
|
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
|
|
|
|
|
|
// Wrapper class for passing expected and actual parameter counts as
|
|
// either registers or immediate values. Used to make sure that the
|
|
// caller provides exactly the expected number of parameters to the
|
|
// callee.
|
|
class ParameterCount BASE_EMBEDDED {
|
|
public:
|
|
explicit ParameterCount(Register reg) : reg_(reg), immediate_(0) {}
|
|
explicit ParameterCount(int imm) : reg_(no_reg), immediate_(imm) {}
|
|
|
|
bool is_reg() const { return !reg_.is(no_reg); }
|
|
bool is_immediate() const { return !is_reg(); }
|
|
|
|
Register reg() const {
|
|
DCHECK(is_reg());
|
|
return reg_;
|
|
}
|
|
int immediate() const {
|
|
DCHECK(is_immediate());
|
|
return immediate_;
|
|
}
|
|
|
|
private:
|
|
const Register reg_;
|
|
const int immediate_;
|
|
|
|
DISALLOW_IMPLICIT_CONSTRUCTORS(ParameterCount);
|
|
};
|
|
|
|
|
|
class AllocationUtils {
|
|
public:
|
|
static ExternalReference GetAllocationTopReference(
|
|
Isolate* isolate, AllocationFlags flags) {
|
|
if ((flags & PRETENURE) != 0) {
|
|
return ExternalReference::old_space_allocation_top_address(isolate);
|
|
}
|
|
return ExternalReference::new_space_allocation_top_address(isolate);
|
|
}
|
|
|
|
|
|
static ExternalReference GetAllocationLimitReference(
|
|
Isolate* isolate, AllocationFlags flags) {
|
|
if ((flags & PRETENURE) != 0) {
|
|
return ExternalReference::old_space_allocation_limit_address(isolate);
|
|
}
|
|
return ExternalReference::new_space_allocation_limit_address(isolate);
|
|
}
|
|
};
|
|
|
|
|
|
} // namespace internal
|
|
} // namespace v8
|
|
|
|
#endif // V8_MACRO_ASSEMBLER_H_
|
|
|