Reviewers: danno, Benedikt Meurer, paul.l..., gergely.kis.imgtec,
akos.palfi.imgtec, dusmil.imgtec,
Description:
MIPS: [turbofan] Optimize division/modulus by constant.
Port r24595 (d0f464e)
TEST=cctest,mjsunit,unittests
BUG=
Please review this at https://codereview.chromium.org/651223003/
Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files (+11, -0 lines):
M src/compiler/mips/code-generator-mips.cc
M src/compiler/mips/instruction-codes-mips.h
M src/compiler/mips/instruction-selector-mips.cc
Index: src/compiler/mips/code-generator-mips.cc
diff --git a/src/compiler/mips/code-generator-mips.cc
b/src/compiler/mips/code-generator-mips.cc
index
8dcca27601ecf684d2de257ab017e3aa200d7482..9609cf4e64a2c939c22e8f8620b169db79edc3f0
100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -185,6 +185,9 @@ void
CodeGenerator::AssembleArchInstruction(Instruction* instr) {
case kMipsMul:
__ Mul(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
break;
+ case kMipsMulHigh:
+ __ Mulh(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
+ break;
case kMipsDiv:
__ Div(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
break;
Index: src/compiler/mips/instruction-codes-mips.h
diff --git a/src/compiler/mips/instruction-codes-mips.h
b/src/compiler/mips/instruction-codes-mips.h
index
cd05afccbc935818ebc3d6386fe5da7bacecae80..4c18ae1e5a07939a47db0e617cc22644d98d8173
100644
--- a/src/compiler/mips/instruction-codes-mips.h
+++ b/src/compiler/mips/instruction-codes-mips.h
@@ -17,6 +17,7 @@ namespace compiler {
V(MipsSub) \
V(MipsSubOvf) \
V(MipsMul) \
+ V(MipsMulHigh) \
V(MipsDiv) \
V(MipsDivU) \
V(MipsMod) \
Index: src/compiler/mips/instruction-selector-mips.cc
diff --git a/src/compiler/mips/instruction-selector-mips.cc
b/src/compiler/mips/instruction-selector-mips.cc
index
c96bb3ac543b5a82e9a7b41a84b12098b333879d..0c9afb062d331849a0e1270e457e745a5efd3c3c
100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -300,6 +300,13 @@ void InstructionSelector::VisitInt32Mul(Node* node) {
}
+void InstructionSelector::VisitInt32MulHigh(Node* node) {
+ MipsOperandGenerator g(this);
+ Emit(kMipsMulHigh, g.DefineAsRegister(node),
g.UseRegister(node->InputAt(0)),
+ g.UseRegister(node->InputAt(1)));
+}
+
+
void InstructionSelector::VisitInt32Div(Node* node) {
MipsOperandGenerator g(this);
Int32BinopMatcher m(node);
--
--
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