MIPS64: Implement branchless HCondition for floats
Test: mma test-art-target-run-test64 in QEMU
Change-Id: I595b5b7ddf9ebb19e872ed85f2e4098a835d9214
diff --git a/compiler/optimizing/code_generator_mips64.cc b/compiler/optimizing/code_generator_mips64.cc
index cdbc712..799360e 100644
--- a/compiler/optimizing/code_generator_mips64.cc
+++ b/compiler/optimizing/code_generator_mips64.cc
@@ -1929,9 +1929,6 @@
Primitive::Type type = instruction->InputAt(0)->GetType();
LocationSummary* locations = instruction->GetLocations();
- GpuRegister dst = locations->Out().AsRegister<GpuRegister>();
- Mips64Label true_label;
-
switch (type) {
default:
// Integer case.
@@ -1940,29 +1937,11 @@
case Primitive::kPrimLong:
GenerateIntLongCompare(instruction->GetCondition(), /* is64bit */ true, locations);
return;
-
case Primitive::kPrimFloat:
case Primitive::kPrimDouble:
- // TODO: don't use branches.
- GenerateFpCompareAndBranch(instruction->GetCondition(),
- instruction->IsGtBias(),
- type,
- locations,
- &true_label);
- break;
+ GenerateFpCompare(instruction->GetCondition(), instruction->IsGtBias(), type, locations);
+ return;
}
-
- // Convert the branches into the result.
- Mips64Label done;
-
- // False case: result = 0.
- __ LoadConst32(dst, 0);
- __ Bc(&done);
-
- // True case: result = 1.
- __ Bind(&true_label);
- __ LoadConst32(dst, 1);
- __ Bind(&done);
}
void InstructionCodeGeneratorMIPS64::DivRemOneOrMinusOne(HBinaryOperation* instruction) {
@@ -2576,6 +2555,121 @@
}
}
+void InstructionCodeGeneratorMIPS64::GenerateFpCompare(IfCondition cond,
+ bool gt_bias,
+ Primitive::Type type,
+ LocationSummary* locations) {
+ GpuRegister dst = locations->Out().AsRegister<GpuRegister>();
+ FpuRegister lhs = locations->InAt(0).AsFpuRegister<FpuRegister>();
+ FpuRegister rhs = locations->InAt(1).AsFpuRegister<FpuRegister>();
+ if (type == Primitive::kPrimFloat) {
+ switch (cond) {
+ case kCondEQ:
+ __ CmpEqS(FTMP, lhs, rhs);
+ __ Mfc1(dst, FTMP);
+ __ Andi(dst, dst, 1);
+ break;
+ case kCondNE:
+ __ CmpEqS(FTMP, lhs, rhs);
+ __ Mfc1(dst, FTMP);
+ __ Addiu(dst, dst, 1);
+ break;
+ case kCondLT:
+ if (gt_bias) {
+ __ CmpLtS(FTMP, lhs, rhs);
+ } else {
+ __ CmpUltS(FTMP, lhs, rhs);
+ }
+ __ Mfc1(dst, FTMP);
+ __ Andi(dst, dst, 1);
+ break;
+ case kCondLE:
+ if (gt_bias) {
+ __ CmpLeS(FTMP, lhs, rhs);
+ } else {
+ __ CmpUleS(FTMP, lhs, rhs);
+ }
+ __ Mfc1(dst, FTMP);
+ __ Andi(dst, dst, 1);
+ break;
+ case kCondGT:
+ if (gt_bias) {
+ __ CmpUltS(FTMP, rhs, lhs);
+ } else {
+ __ CmpLtS(FTMP, rhs, lhs);
+ }
+ __ Mfc1(dst, FTMP);
+ __ Andi(dst, dst, 1);
+ break;
+ case kCondGE:
+ if (gt_bias) {
+ __ CmpUleS(FTMP, rhs, lhs);
+ } else {
+ __ CmpLeS(FTMP, rhs, lhs);
+ }
+ __ Mfc1(dst, FTMP);
+ __ Andi(dst, dst, 1);
+ break;
+ default:
+ LOG(FATAL) << "Unexpected non-floating-point condition " << cond;
+ UNREACHABLE();
+ }
+ } else {
+ DCHECK_EQ(type, Primitive::kPrimDouble);
+ switch (cond) {
+ case kCondEQ:
+ __ CmpEqD(FTMP, lhs, rhs);
+ __ Mfc1(dst, FTMP);
+ __ Andi(dst, dst, 1);
+ break;
+ case kCondNE:
+ __ CmpEqD(FTMP, lhs, rhs);
+ __ Mfc1(dst, FTMP);
+ __ Addiu(dst, dst, 1);
+ break;
+ case kCondLT:
+ if (gt_bias) {
+ __ CmpLtD(FTMP, lhs, rhs);
+ } else {
+ __ CmpUltD(FTMP, lhs, rhs);
+ }
+ __ Mfc1(dst, FTMP);
+ __ Andi(dst, dst, 1);
+ break;
+ case kCondLE:
+ if (gt_bias) {
+ __ CmpLeD(FTMP, lhs, rhs);
+ } else {
+ __ CmpUleD(FTMP, lhs, rhs);
+ }
+ __ Mfc1(dst, FTMP);
+ __ Andi(dst, dst, 1);
+ break;
+ case kCondGT:
+ if (gt_bias) {
+ __ CmpUltD(FTMP, rhs, lhs);
+ } else {
+ __ CmpLtD(FTMP, rhs, lhs);
+ }
+ __ Mfc1(dst, FTMP);
+ __ Andi(dst, dst, 1);
+ break;
+ case kCondGE:
+ if (gt_bias) {
+ __ CmpUleD(FTMP, rhs, lhs);
+ } else {
+ __ CmpLeD(FTMP, rhs, lhs);
+ }
+ __ Mfc1(dst, FTMP);
+ __ Andi(dst, dst, 1);
+ break;
+ default:
+ LOG(FATAL) << "Unexpected non-floating-point condition " << cond;
+ UNREACHABLE();
+ }
+ }
+}
+
void InstructionCodeGeneratorMIPS64::GenerateFpCompareAndBranch(IfCondition cond,
bool gt_bias,
Primitive::Type type,
diff --git a/compiler/optimizing/code_generator_mips64.h b/compiler/optimizing/code_generator_mips64.h
index 5e049ae..0271219 100644
--- a/compiler/optimizing/code_generator_mips64.h
+++ b/compiler/optimizing/code_generator_mips64.h
@@ -250,6 +250,10 @@
bool is64bit,
LocationSummary* locations,
Mips64Label* label);
+ void GenerateFpCompare(IfCondition cond,
+ bool gt_bias,
+ Primitive::Type type,
+ LocationSummary* locations);
void GenerateFpCompareAndBranch(IfCondition cond,
bool gt_bias,
Primitive::Type type,
