Reviewers: danno, Yang, Paul Lind, kisg, Jakob, palfia, dusmil,
Description:
MIPS: Harmony: optimize Math.clz32.
Port r19487 (bd8c70f)
BUG=v8:2938
LOG=N
Please review this at https://codereview.chromium.org/172533002/
SVN Base: [email protected]:paul99/v8m-rb.git@master
Affected files (+29, -0 lines):
M src/mips/lithium-codegen-mips.cc
M src/mips/lithium-mips.h
M src/mips/lithium-mips.cc
Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc
b/src/mips/lithium-codegen-mips.cc
index
762d1a707f4809627a237fbf7dfa497d78436049..8148489dbb6163db9433ec7c4a31387459905648
100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -3796,6 +3796,13 @@ void LCodeGen::DoMathLog(LMathLog* instr) {
}
+void LCodeGen::DoMathClz32(LMathClz32* instr) {
+ Register input = ToRegister(instr->value());
+ Register result = ToRegister(instr->result());
+ __ clz(result, input);
+}
+
+
void LCodeGen::DoInvokeFunction(LInvokeFunction* instr) {
ASSERT(ToRegister(instr->context()).is(cp));
ASSERT(ToRegister(instr->function()).is(a1));
Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index
a194c29eab9f0d0c1bd7183fe43d90f4ceccbcbc..1539deb9c3d701f885af866637d1c3813ca50ef2
100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -1101,6 +1101,7 @@ LInstruction*
LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
case kMathExp: return DoMathExp(instr);
case kMathSqrt: return DoMathSqrt(instr);
case kMathPowHalf: return DoMathPowHalf(instr);
+ case kMathClz32: return DoMathClz32(instr);
default:
UNREACHABLE();
return NULL;
@@ -1116,6 +1117,13 @@ LInstruction*
LChunkBuilder::DoMathLog(HUnaryMathOperation* 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) {
ASSERT(instr->representation().IsDouble());
ASSERT(instr->value()->representation().IsDouble());
Index: src/mips/lithium-mips.h
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index
258502dc263613766aaab92f452ec411bb8b601e..67836cf7b38ca6cf05a62e83a37b5994b65886ce
100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -125,6 +125,7 @@ class LCodeGen;
V(MapEnumLength) \
V(MathAbs) \
V(MathExp) \
+ V(MathClz32) \
V(MathFloor) \
V(MathFloorOfDiv) \
V(MathLog) \
@@ -802,6 +803,18 @@ class LMathLog V8_FINAL : public
LTemplateInstruction<1, 1, 0> {
};
+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:
LMathExp(LOperand* value,
@@ -2578,6 +2591,7 @@ class LChunkBuilder V8_FINAL : public
LChunkBuilderBase {
LInstruction* DoMathExp(HUnaryMathOperation* instr);
LInstruction* DoMathSqrt(HUnaryMathOperation* instr);
LInstruction* DoMathPowHalf(HUnaryMathOperation* instr);
+ LInstruction* DoMathClz32(HUnaryMathOperation* instr);
private:
enum Status {
--
--
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