Revision: 19499
Author: [email protected]
Date: Wed Feb 19 18:16:06 2014 UTC
Log: MIPS: Harmony: optimize Math.clz32.
Port r19487 (bd8c70f)
BUG=v8:2938
LOG=N
[email protected]
Review URL: https://codereview.chromium.org/172533002
Patch from Balazs Kilvady <[email protected]>.
http://code.google.com/p/v8/source/detail?r=19499
Modified:
/branches/bleeding_edge/src/mips/lithium-codegen-mips.cc
/branches/bleeding_edge/src/mips/lithium-mips.cc
/branches/bleeding_edge/src/mips/lithium-mips.h
=======================================
--- /branches/bleeding_edge/src/mips/lithium-codegen-mips.cc Wed Feb 19
14:03:48 2014 UTC
+++ /branches/bleeding_edge/src/mips/lithium-codegen-mips.cc Wed Feb 19
18:16:06 2014 UTC
@@ -3794,6 +3794,13 @@
0, 1);
__ MovFromFloatResult(ToDoubleRegister(instr->result()));
}
+
+
+void LCodeGen::DoMathClz32(LMathClz32* instr) {
+ Register input = ToRegister(instr->value());
+ Register result = ToRegister(instr->result());
+ __ Clz(result, input);
+}
void LCodeGen::DoInvokeFunction(LInvokeFunction* instr) {
=======================================
--- /branches/bleeding_edge/src/mips/lithium-mips.cc Thu Feb 13 18:11:49
2014 UTC
+++ /branches/bleeding_edge/src/mips/lithium-mips.cc Wed Feb 19 18:16:06
2014 UTC
@@ -1101,6 +1101,7 @@
case kMathExp: return DoMathExp(instr);
case kMathSqrt: return DoMathSqrt(instr);
case kMathPowHalf: return DoMathPowHalf(instr);
+ case kMathClz32: return DoMathClz32(instr);
default:
UNREACHABLE();
return NULL;
@@ -1114,6 +1115,13 @@
LOperand* input = UseFixedDouble(instr->value(), f4);
return MarkAsCall(DefineFixedDouble(new(zone()) LMathLog(input), f4),
instr);
}
+
+
+LInstruction* LChunkBuilder::DoMathClz32(HUnaryMathOperation* instr) {
+ LOperand* input = UseRegisterAtStart(instr->value());
+ LMathClz32* result = new(zone()) LMathClz32(input);
+ return DefineAsRegister(result);
+}
LInstruction* LChunkBuilder::DoMathExp(HUnaryMathOperation* instr) {
=======================================
--- /branches/bleeding_edge/src/mips/lithium-mips.h Thu Feb 13 18:11:49
2014 UTC
+++ /branches/bleeding_edge/src/mips/lithium-mips.h Wed Feb 19 18:16:06
2014 UTC
@@ -125,6 +125,7 @@
V(MapEnumLength) \
V(MathAbs) \
V(MathExp) \
+ V(MathClz32) \
V(MathFloor) \
V(MathFloorOfDiv) \
V(MathLog) \
@@ -801,6 +802,18 @@
DECLARE_CONCRETE_INSTRUCTION(MathLog, "math-log")
};
+
+class LMathClz32 V8_FINAL : public LTemplateInstruction<1, 1, 0> {
+ public:
+ explicit LMathClz32(LOperand* value) {
+ inputs_[0] = value;
+ }
+
+ LOperand* value() { return inputs_[0]; }
+
+ DECLARE_CONCRETE_INSTRUCTION(MathClz32, "math-clz32")
+};
+
class LMathExp V8_FINAL : public LTemplateInstruction<1, 1, 3> {
public:
@@ -2578,6 +2591,7 @@
LInstruction* DoMathExp(HUnaryMathOperation* instr);
LInstruction* DoMathSqrt(HUnaryMathOperation* instr);
LInstruction* DoMathPowHalf(HUnaryMathOperation* instr);
+ LInstruction* DoMathClz32(HUnaryMathOperation* instr);
private:
enum Status {
--
--
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