Implemented signum() on ARM64.
Change-Id: Ib805e62341f6c5e4fcc35c73d12e217fbae948ce
diff --git a/compiler/optimizing/intrinsics_arm64.cc b/compiler/optimizing/intrinsics_arm64.cc
index 98d041a..1376695 100644
--- a/compiler/optimizing/intrinsics_arm64.cc
+++ b/compiler/optimizing/intrinsics_arm64.cc
@@ -1499,6 +1499,34 @@
__ Bind(slow_path->GetExitLabel());
}
+static void GenSignum(LocationSummary* locations, bool is_long, vixl::MacroAssembler* masm) {
+ Location op1 = locations->InAt(0);
+ Location out = locations->Out();
+
+ Register op1_reg = is_long ? XRegisterFrom(op1) : WRegisterFrom(op1);
+ Register out_reg = WRegisterFrom(out);
+
+ __ Cmp(op1_reg, 0);
+ __ Cset(out_reg, gt); // out == +1 if GT or 0 otherwise
+ __ Cinv(out_reg, out_reg, lt); // out == -1 if LT or unchanged otherwise
+}
+
+void IntrinsicLocationsBuilderARM64::VisitIntegerSignum(HInvoke* invoke) {
+ CreateIntToIntLocations(arena_, invoke);
+}
+
+void IntrinsicCodeGeneratorARM64::VisitIntegerSignum(HInvoke* invoke) {
+ GenSignum(invoke->GetLocations(), /* is_long */ false, GetVIXLAssembler());
+}
+
+void IntrinsicLocationsBuilderARM64::VisitLongSignum(HInvoke* invoke) {
+ CreateIntToIntLocations(arena_, invoke);
+}
+
+void IntrinsicCodeGeneratorARM64::VisitLongSignum(HInvoke* invoke) {
+ GenSignum(invoke->GetLocations(), /* is_long */ true, GetVIXLAssembler());
+}
+
// Unimplemented intrinsics.
#define UNIMPLEMENTED_INTRINSIC(Name) \
@@ -1541,8 +1569,6 @@
UNIMPLEMENTED_INTRINSIC(LongHighestOneBit)
UNIMPLEMENTED_INTRINSIC(IntegerLowestOneBit)
UNIMPLEMENTED_INTRINSIC(LongLowestOneBit)
-UNIMPLEMENTED_INTRINSIC(IntegerSignum)
-UNIMPLEMENTED_INTRINSIC(LongSignum)
// Rotate operations are handled as HRor instructions.
UNIMPLEMENTED_INTRINSIC(IntegerRotateLeft)
