Skip to content

V
V8
Commit d401543f authored by shiyu.zhang's avatar shiyu.zhang Committed by Commit bot
Browse files
Options

[ia32] Optimize index calculation for certain checked load/stores. 

It reduces the add operation for certain checked load/stores by pre-do
the add in compiling phase.

BUG=

Review-Url: https://codereview.chromium.org/2593483002
Cr-Commit-Position: refs/heads/master@{#43128}
parent 340c64af
Hide whitespace changes
Inline Side-by-side
Showing with 463 additions and 58 deletions
src/compiler/ia32/code-generator-ia32.cc
View file @ d401543f
...@@ -183,9 +183,9 @@ bool HasImmediateInput(Instruction* instr, size_t index) { ...@@ -183,9 +183,9 @@ bool HasImmediateInput(Instruction* instr, size_t index) {
return instr->InputAt(index)->IsImmediate(); return instr->InputAt(index)->IsImmediate();
} }
class OutOfLineLoadInteger final : public OutOfLineCode { class OutOfLineLoadZero final : public OutOfLineCode {
public: public:
OutOfLineLoadInteger(CodeGenerator* gen, Register result) OutOfLineLoadZero(CodeGenerator* gen, Register result)
: OutOfLineCode(gen), result_(result) {} : OutOfLineCode(gen), result_(result) {}
void Generate() final { __ xor_(result_, result_); } void Generate() final { __ xor_(result_, result_); }
...@@ -283,66 +283,423 @@ class OutOfLineRecordWrite final : public OutOfLineCode { ...@@ -283,66 +283,423 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
} // namespace } // namespace
#define ASSEMBLE_CHECKED_LOAD_FLOAT(asm_instr, OutOfLineLoadNaN) \ #define ASSEMBLE_CHECKED_LOAD_FLOAT(asm_instr, OutOfLineLoadNaN, \
do { \ SingleOrDouble) \
auto result = i.OutputDoubleRegister(); \ do { \
auto offset = i.InputRegister(0); \ auto result = i.OutputDoubleRegister(); \
if (instr->InputAt(1)->IsRegister()) { \ if (instr->InputAt(0)->IsRegister()) { \
__ cmp(offset, i.InputRegister(1)); \ auto offset = i.InputRegister(0); \
} else { \ if (instr->InputAt(1)->IsRegister()) { \
__ cmp(offset, i.InputImmediate(1)); \ __ cmp(offset, i.InputRegister(1)); \
} \ } else { \
OutOfLineCode* ool = new (zone()) OutOfLineLoadNaN(this, result); \ __ cmp(offset, i.InputImmediate(1)); \
__ j(above_equal, ool->entry()); \ } \
__ asm_instr(result, i.MemoryOperand(2)); \ OutOfLineCode* ool = new (zone()) OutOfLineLoadNaN(this, result); \
__ bind(ool->exit()); \ __ j(above_equal, ool->entry()); \
__ asm_instr(result, i.MemoryOperand(2)); \
__ bind(ool->exit()); \
} else { \
auto index2 = i.InputInt32(0); \
auto length = i.InputInt32(1); \
auto index1 = i.InputRegister(2); \
RelocInfo::Mode rmode_length = i.ToConstant(instr->InputAt(1)).rmode(); \
RelocInfo::Mode rmode_buffer = i.ToConstant(instr->InputAt(3)).rmode(); \
DCHECK_LE(index2, length); \
__ cmp(index1, Immediate(reinterpret_cast<Address>(length - index2), \
rmode_length)); \
class OutOfLineLoadFloat final : public OutOfLineCode { \
public: \
OutOfLineLoadFloat(CodeGenerator* gen, XMMRegister result, \
Register buffer, Register index1, int32_t index2, \
int32_t length, RelocInfo::Mode rmode_length, \
RelocInfo::Mode rmode_buffer) \
: OutOfLineCode(gen), \
result_(result), \
buffer_reg_(buffer), \
buffer_int_(0), \
index1_(index1), \
index2_(index2), \
length_(length), \
rmode_length_(rmode_length), \
rmode_buffer_(rmode_buffer) {} \
\
OutOfLineLoadFloat(CodeGenerator* gen, XMMRegister result, \
int32_t buffer, Register index1, int32_t index2, \
int32_t length, RelocInfo::Mode rmode_length, \
RelocInfo::Mode rmode_buffer) \
: OutOfLineCode(gen), \
result_(result), \
buffer_reg_({-1}), \
buffer_int_(buffer), \
index1_(index1), \
index2_(index2), \
length_(length), \
rmode_length_(rmode_length), \
rmode_buffer_(rmode_buffer) {} \
\
void Generate() final { \
Label oob; \
__ push(index1_); \
__ lea(index1_, Operand(index1_, index2_)); \
__ cmp(index1_, Immediate(reinterpret_cast<Address>(length_), \
rmode_length_)); \
__ j(above_equal, &oob, Label::kNear); \
if (buffer_reg_.is_valid()) { \
__ asm_instr(result_, Operand(buffer_reg_, index1_, times_1, 0)); \
} else { \
__ asm_instr(result_, \
Operand(index1_, buffer_int_, rmode_buffer_)); \
} \
__ pop(index1_); \
__ jmp(exit()); \
__ bind(&oob); \
__ pop(index1_); \
__ xorp##SingleOrDouble(result_, result_); \
__ divs##SingleOrDouble(result_, result_); \
} \
\
private: \
XMMRegister const result_; \
Register const buffer_reg_; \
int32_t const buffer_int_; \
Register const index1_; \
int32_t const index2_; \
int32_t const length_; \
RelocInfo::Mode rmode_length_; \
RelocInfo::Mode rmode_buffer_; \
}; \
if (instr->InputAt(3)->IsRegister()) { \
auto buffer = i.InputRegister(3); \
OutOfLineCode* ool = new (zone()) \
OutOfLineLoadFloat(this, result, buffer, index1, index2, length, \
rmode_length, rmode_buffer); \
__ j(above_equal, ool->entry()); \
__ asm_instr(result, Operand(buffer, index1, times_1, index2)); \
__ bind(ool->exit()); \
} else { \
auto buffer = i.InputInt32(3); \
OutOfLineCode* ool = new (zone()) \
OutOfLineLoadFloat(this, result, buffer, index1, index2, length, \
rmode_length, rmode_buffer); \
__ j(above_equal, ool->entry()); \
__ asm_instr(result, Operand(index1, buffer + index2, rmode_buffer)); \
__ bind(ool->exit()); \
} \
} \
} while (false) } while (false)
#define ASSEMBLE_CHECKED_LOAD_INTEGER(asm_instr) \ #define ASSEMBLE_CHECKED_LOAD_INTEGER(asm_instr) \
do { \ do { \
auto result = i.OutputRegister(); \ auto result = i.OutputRegister(); \
auto offset = i.InputRegister(0); \ if (instr->InputAt(0)->IsRegister()) { \
if (instr->InputAt(1)->IsRegister()) { \ auto offset = i.InputRegister(0); \
__ cmp(offset, i.InputRegister(1)); \ if (instr->InputAt(1)->IsRegister()) { \
} else { \ __ cmp(offset, i.InputRegister(1)); \
__ cmp(offset, i.InputImmediate(1)); \ } else { \
} \ __ cmp(offset, i.InputImmediate(1)); \
OutOfLineCode* ool = new (zone()) OutOfLineLoadInteger(this, result); \ } \
__ j(above_equal, ool->entry()); \ OutOfLineCode* ool = new (zone()) OutOfLineLoadZero(this, result); \
__ asm_instr(result, i.MemoryOperand(2)); \ __ j(above_equal, ool->entry()); \
__ bind(ool->exit()); \ __ asm_instr(result, i.MemoryOperand(2)); \
__ bind(ool->exit()); \
} else { \
auto index2 = i.InputInt32(0); \
auto length = i.InputInt32(1); \
auto index1 = i.InputRegister(2); \
RelocInfo::Mode rmode_length = i.ToConstant(instr->InputAt(1)).rmode(); \
RelocInfo::Mode rmode_buffer = i.ToConstant(instr->InputAt(3)).rmode(); \
DCHECK_LE(index2, length); \
__ cmp(index1, Immediate(reinterpret_cast<Address>(length - index2), \
rmode_length)); \
class OutOfLineLoadInteger final : public OutOfLineCode { \
public: \
OutOfLineLoadInteger(CodeGenerator* gen, Register result, \
Register buffer, Register index1, int32_t index2, \
int32_t length, RelocInfo::Mode rmode_length, \
RelocInfo::Mode rmode_buffer) \
: OutOfLineCode(gen), \
result_(result), \
buffer_reg_(buffer), \
buffer_int_(0), \
index1_(index1), \
index2_(index2), \
length_(length), \
rmode_length_(rmode_length), \
rmode_buffer_(rmode_buffer) {} \
\
OutOfLineLoadInteger(CodeGenerator* gen, Register result, \
int32_t buffer, Register index1, int32_t index2, \
int32_t length, RelocInfo::Mode rmode_length, \
RelocInfo::Mode rmode_buffer) \
: OutOfLineCode(gen), \
result_(result), \
buffer_reg_({-1}), \
buffer_int_(buffer), \
index1_(index1), \
index2_(index2), \
length_(length), \
rmode_length_(rmode_length), \
rmode_buffer_(rmode_buffer) {} \
\
void Generate() final { \
Label oob; \
bool need_cache = !result_.is(index1_); \
if (need_cache) __ push(index1_); \
__ lea(index1_, Operand(index1_, index2_)); \
__ cmp(index1_, Immediate(reinterpret_cast<Address>(length_), \
rmode_length_)); \
__ j(above_equal, &oob, Label::kNear); \
if (buffer_reg_.is_valid()) { \
__ asm_instr(result_, Operand(buffer_reg_, index1_, times_1, 0)); \
} else { \
__ asm_instr(result_, \
Operand(index1_, buffer_int_, rmode_buffer_)); \
} \
if (need_cache) __ pop(index1_); \
__ jmp(exit()); \
__ bind(&oob); \
if (need_cache) __ pop(index1_); \
__ xor_(result_, result_); \
} \
\
private: \
Register const result_; \
Register const buffer_reg_; \
int32_t const buffer_int_; \
Register const index1_; \
int32_t const index2_; \
int32_t const length_; \
RelocInfo::Mode rmode_length_; \
RelocInfo::Mode rmode_buffer_; \
}; \
if (instr->InputAt(3)->IsRegister()) { \
auto buffer = i.InputRegister(3); \
OutOfLineCode* ool = new (zone()) \
OutOfLineLoadInteger(this, result, buffer, index1, index2, length, \
rmode_length, rmode_buffer); \
__ j(above_equal, ool->entry()); \
__ asm_instr(result, Operand(buffer, index1, times_1, index2)); \
__ bind(ool->exit()); \
} else { \
auto buffer = i.InputInt32(3); \
OutOfLineCode* ool = new (zone()) \
OutOfLineLoadInteger(this, result, buffer, index1, index2, length, \
rmode_length, rmode_buffer); \
__ j(above_equal, ool->entry()); \
__ asm_instr(result, Operand(index1, buffer + index2, rmode_buffer)); \
__ bind(ool->exit()); \
} \
} \
} while (false)
#define ASSEMBLE_CHECKED_STORE_FLOAT(asm_instr) \
do { \
auto value = i.InputDoubleRegister(2); \
if (instr->InputAt(0)->IsRegister()) { \
auto offset = i.InputRegister(0); \
if (instr->InputAt(1)->IsRegister()) { \
__ cmp(offset, i.InputRegister(1)); \
} else { \
__ cmp(offset, i.InputImmediate(1)); \
} \
Label done; \
__ j(above_equal, &done, Label::kNear); \
__ asm_instr(i.MemoryOperand(3), value); \
__ bind(&done); \
} else { \
auto index2 = i.InputInt32(0); \
auto length = i.InputInt32(1); \
auto index1 = i.InputRegister(3); \
RelocInfo::Mode rmode_length = i.ToConstant(instr->InputAt(1)).rmode(); \
RelocInfo::Mode rmode_buffer = i.ToConstant(instr->InputAt(4)).rmode(); \
DCHECK_LE(index2, length); \
__ cmp(index1, Immediate(reinterpret_cast<Address>(length - index2), \
rmode_length)); \
class OutOfLineStoreFloat final : public OutOfLineCode { \
public: \
OutOfLineStoreFloat(CodeGenerator* gen, Register buffer, \
Register index1, int32_t index2, int32_t length, \
XMMRegister value, RelocInfo::Mode rmode_length, \
RelocInfo::Mode rmode_buffer) \
: OutOfLineCode(gen), \
buffer_reg_(buffer), \
buffer_int_(0), \
index1_(index1), \
index2_(index2), \
length_(length), \
value_(value), \
rmode_length_(rmode_length), \
rmode_buffer_(rmode_buffer) {} \
\
OutOfLineStoreFloat(CodeGenerator* gen, int32_t buffer, \
Register index1, int32_t index2, int32_t length, \
XMMRegister value, RelocInfo::Mode rmode_length, \
RelocInfo::Mode rmode_buffer) \
: OutOfLineCode(gen), \
buffer_reg_({-1}), \
buffer_int_(buffer), \
index1_(index1), \
index2_(index2), \
length_(length), \
value_(value), \
rmode_length_(rmode_length), \
rmode_buffer_(rmode_buffer) {} \
\
void Generate() final { \
Label oob; \
__ push(index1_); \
__ lea(index1_, Operand(index1_, index2_)); \
__ cmp(index1_, Immediate(reinterpret_cast<Address>(length_), \
rmode_length_)); \
__ j(above_equal, &oob, Label::kNear); \
if (buffer_reg_.is_valid()) { \
__ asm_instr(Operand(buffer_reg_, index1_, times_1, 0), value_); \
} else { \
__ asm_instr(Operand(index1_, buffer_int_, rmode_buffer_), \
value_); \
} \
__ bind(&oob); \
__ pop(index1_); \
} \
\
private: \
Register const buffer_reg_; \
int32_t const buffer_int_; \
Register const index1_; \
int32_t const index2_; \
int32_t const length_; \
XMMRegister const value_; \
RelocInfo::Mode rmode_length_; \
RelocInfo::Mode rmode_buffer_; \
}; \
if (instr->InputAt(4)->IsRegister()) { \
auto buffer = i.InputRegister(4); \
OutOfLineCode* ool = new (zone()) \
OutOfLineStoreFloat(this, buffer, index1, index2, length, value, \
rmode_length, rmode_buffer); \
__ j(above_equal, ool->entry()); \
__ asm_instr(Operand(buffer, index1, times_1, index2), value); \
__ bind(ool->exit()); \
} else { \
auto buffer = i.InputInt32(4); \
OutOfLineCode* ool = new (zone()) \
OutOfLineStoreFloat(this, buffer, index1, index2, length, value, \
rmode_length, rmode_buffer); \
__ j(above_equal, ool->entry()); \
__ asm_instr(Operand(index1, buffer + index2, rmode_buffer), value); \
__ bind(ool->exit()); \
} \
} \
} while (false) } while (false)
#define ASSEMBLE_CHECKED_STORE_FLOAT(asm_instr) \ #define ASSEMBLE_CHECKED_STORE_INTEGER_IMPL(asm_instr, Value) \
do { \ do { \
auto offset = i.InputRegister(0); \ if (instr->InputAt(0)->IsRegister()) { \
if (instr->InputAt(1)->IsRegister()) { \ auto offset = i.InputRegister(0); \
__ cmp(offset, i.InputRegister(1)); \ if (instr->InputAt(1)->IsRegister()) { \
} else { \ __ cmp(offset, i.InputRegister(1)); \
__ cmp(offset, i.InputImmediate(1)); \ } else { \
} \ __ cmp(offset, i.InputImmediate(1)); \
Label done; \ } \
__ j(above_equal, &done, Label::kNear); \ Label done; \
__ asm_instr(i.MemoryOperand(3), i.InputDoubleRegister(2)); \ __ j(above_equal, &done, Label::kNear); \
__ bind(&done); \ __ asm_instr(i.MemoryOperand(3), value); \
__ bind(&done); \
} else { \
auto index2 = i.InputInt32(0); \
auto length = i.InputInt32(1); \
auto index1 = i.InputRegister(3); \
RelocInfo::Mode rmode_length = i.ToConstant(instr->InputAt(1)).rmode(); \
RelocInfo::Mode rmode_buffer = i.ToConstant(instr->InputAt(4)).rmode(); \
DCHECK_LE(index2, length); \
__ cmp(index1, Immediate(reinterpret_cast<Address>(length - index2), \
rmode_length)); \
class OutOfLineStoreInteger final : public OutOfLineCode { \
public: \
OutOfLineStoreInteger(CodeGenerator* gen, Register buffer, \
Register index1, int32_t index2, int32_t length, \
Value value, RelocInfo::Mode rmode_length, \
RelocInfo::Mode rmode_buffer) \
: OutOfLineCode(gen), \
buffer_reg_(buffer), \
buffer_int_(0), \
index1_(index1), \
index2_(index2), \
length_(length), \
value_(value), \
rmode_length_(rmode_length), \
rmode_buffer_(rmode_buffer) {} \
\
OutOfLineStoreInteger(CodeGenerator* gen, int32_t buffer, \
Register index1, int32_t index2, int32_t length, \
Value value, RelocInfo::Mode rmode_length, \
RelocInfo::Mode rmode_buffer) \
: OutOfLineCode(gen), \
buffer_reg_({-1}), \
buffer_int_(buffer), \
index1_(index1), \
index2_(index2), \
length_(length), \
value_(value), \
rmode_length_(rmode_length), \
rmode_buffer_(rmode_buffer) {} \
\
void Generate() final { \
Label oob; \
__ push(index1_); \
__ lea(index1_, Operand(index1_, index2_)); \
__ cmp(index1_, Immediate(reinterpret_cast<Address>(length_), \
rmode_length_)); \
__ j(above_equal, &oob, Label::kNear); \
if (buffer_reg_.is_valid()) { \
__ asm_instr(Operand(buffer_reg_, index1_, times_1, 0), value_); \
} else { \
__ asm_instr(Operand(index1_, buffer_int_, rmode_buffer_), \
value_); \
} \
__ bind(&oob); \
__ pop(index1_); \
} \
\
private: \
Register const buffer_reg_; \
int32_t const buffer_int_; \
Register const index1_; \
int32_t const index2_; \
int32_t const length_; \
Value const value_; \
RelocInfo::Mode rmode_length_; \
RelocInfo::Mode rmode_buffer_; \
}; \
if (instr->InputAt(4)->IsRegister()) { \
auto buffer = i.InputRegister(4); \
OutOfLineCode* ool = new (zone()) \
OutOfLineStoreInteger(this, buffer, index1, index2, length, value, \
rmode_length, rmode_buffer); \
__ j(above_equal, ool->entry()); \
__ asm_instr(Operand(buffer, index1, times_1, index2), value); \
__ bind(ool->exit()); \
} else { \
auto buffer = i.InputInt32(4); \
OutOfLineCode* ool = new (zone()) \
OutOfLineStoreInteger(this, buffer, index1, index2, length, value, \
rmode_length, rmode_buffer); \
__ j(above_equal, ool->entry()); \
__ asm_instr(Operand(index1, buffer + index2, rmode_buffer), value); \
__ bind(ool->exit()); \
} \
} \
} while (false) } while (false)
#define ASSEMBLE_CHECKED_STORE_INTEGER(asm_instr) \ #define ASSEMBLE_CHECKED_STORE_INTEGER(asm_instr) \
do { \ do { \
auto offset = i.InputRegister(0); \ if (instr->InputAt(2)->IsRegister()) { \
if (instr->InputAt(1)->IsRegister()) { \ Register value = i.InputRegister(2); \
__ cmp(offset, i.InputRegister(1)); \ ASSEMBLE_CHECKED_STORE_INTEGER_IMPL(asm_instr, Register); \
} else { \ } else { \
__ cmp(offset, i.InputImmediate(1)); \ Immediate value = i.InputImmediate(2); \
} \ ASSEMBLE_CHECKED_STORE_INTEGER_IMPL(asm_instr, Immediate); \
Label done; \ } \
__ j(above_equal, &done, Label::kNear); \
if (instr->InputAt(2)->IsRegister()) { \
__ asm_instr(i.MemoryOperand(3), i.InputRegister(2)); \
} else { \
__ asm_instr(i.MemoryOperand(3), i.InputImmediate(2)); \
} \
__ bind(&done); \
} while (false) } while (false)
#define ASSEMBLE_COMPARE(asm_instr) \ #define ASSEMBLE_COMPARE(asm_instr) \
...@@ -1560,10 +1917,10 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction( ...@@ -1560,10 +1917,10 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
ASSEMBLE_CHECKED_LOAD_INTEGER(mov); ASSEMBLE_CHECKED_LOAD_INTEGER(mov);
break; break;
case kCheckedLoadFloat32: case kCheckedLoadFloat32:
ASSEMBLE_CHECKED_LOAD_FLOAT(movss, OutOfLineLoadFloat32NaN); ASSEMBLE_CHECKED_LOAD_FLOAT(movss, OutOfLineLoadFloat32NaN, s);
break; break;
case kCheckedLoadFloat64: case kCheckedLoadFloat64:
ASSEMBLE_CHECKED_LOAD_FLOAT(movsd, OutOfLineLoadFloat64NaN); ASSEMBLE_CHECKED_LOAD_FLOAT(movsd, OutOfLineLoadFloat64NaN, d);
break; break;
case kCheckedStoreWord8: case kCheckedStoreWord8:
ASSEMBLE_CHECKED_STORE_INTEGER(mov_b); ASSEMBLE_CHECKED_STORE_INTEGER(mov_b);
......
src/compiler/ia32/instruction-selector-ia32.cc
View file @ d401543f
...@@ -395,6 +395,30 @@ void InstructionSelector::VisitCheckedLoad(Node* node) { ...@@ -395,6 +395,30 @@ void InstructionSelector::VisitCheckedLoad(Node* node) {
UNREACHABLE(); UNREACHABLE();
return; return;
} }
if (offset->opcode() == IrOpcode::kInt32Add && CanCover(node, offset)) {
Int32BinopMatcher moffset(offset);
InstructionOperand buffer_operand = g.CanBeImmediate(buffer)
? g.UseImmediate(buffer)
: g.UseRegister(buffer);
Int32Matcher mlength(length);
if (mlength.HasValue() && moffset.right().HasValue() &&
moffset.right().Value() >= 0 &&
mlength.Value() >= moffset.right().Value()) {
Emit(opcode, g.DefineAsRegister(node),
g.UseImmediate(moffset.right().node()), g.UseImmediate(length),
g.UseRegister(moffset.left().node()), buffer_operand);
return;
}
IntMatcher<int32_t, IrOpcode::kRelocatableInt32Constant> mmlength(length);
if (mmlength.HasValue() && moffset.right().HasValue() &&
moffset.right().Value() >= 0 &&
mmlength.Value() >= moffset.right().Value()) {
Emit(opcode, g.DefineAsRegister(node),
g.UseImmediate(moffset.right().node()), g.UseImmediate(length),
g.UseRegister(moffset.left().node()), buffer_operand);
return;
}
}
InstructionOperand offset_operand = g.UseRegister(offset); InstructionOperand offset_operand = g.UseRegister(offset);
InstructionOperand length_operand = InstructionOperand length_operand =
g.CanBeImmediate(length) ? g.UseImmediate(length) : g.UseRegister(length); g.CanBeImmediate(length) ? g.UseImmediate(length) : g.UseRegister(length);
...@@ -450,6 +474,30 @@ void InstructionSelector::VisitCheckedStore(Node* node) { ...@@ -450,6 +474,30 @@ void InstructionSelector::VisitCheckedStore(Node* node) {
rep == MachineRepresentation::kBit) rep == MachineRepresentation::kBit)
? g.UseByteRegister(value) ? g.UseByteRegister(value)
: g.UseRegister(value)); : g.UseRegister(value));
if (offset->opcode() == IrOpcode::kInt32Add && CanCover(node, offset)) {
Int32BinopMatcher moffset(offset);
InstructionOperand buffer_operand = g.CanBeImmediate(buffer)
? g.UseImmediate(buffer)
: g.UseRegister(buffer);
Int32Matcher mlength(length);
if (mlength.HasValue() && moffset.right().HasValue() &&
moffset.right().Value() >= 0 &&
mlength.Value() >= moffset.right().Value()) {
Emit(opcode, g.NoOutput(), g.UseImmediate(moffset.right().node()),
g.UseImmediate(length), value_operand,
g.UseRegister(moffset.left().node()), buffer_operand);
return;
}
IntMatcher<int32_t, IrOpcode::kRelocatableInt32Constant> mmlength(length);
if (mmlength.HasValue() && moffset.right().HasValue() &&
moffset.right().Value() >= 0 &&
mmlength.Value() >= moffset.right().Value()) {
Emit(opcode, g.NoOutput(), g.UseImmediate(moffset.right().node()),
g.UseImmediate(length), value_operand,
g.UseRegister(moffset.left().node()), buffer_operand);
return;
}
}
InstructionOperand offset_operand = g.UseRegister(offset); InstructionOperand offset_operand = g.UseRegister(offset);
InstructionOperand length_operand = InstructionOperand length_operand =
g.CanBeImmediate(length) ? g.UseImmediate(length) : g.UseRegister(length); g.CanBeImmediate(length) ? g.UseImmediate(length) : g.UseRegister(length);
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment