PowerPC: Lowering floor intrinsic for Altivec
This patch lowers the llvm.floor, llvm.ceil, llvm.trunc, and
llvm.nearbyint to Altivec instruction when using 4 single-precision
float vectors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168086 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index d51baa6..7d97450 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -402,6 +402,10 @@
setOperationAction(ISD::FP_TO_UINT, MVT::v4i32, Legal);
setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
setOperationAction(ISD::UINT_TO_FP, MVT::v4i32, Legal);
+ setOperationAction(ISD::FFLOOR, MVT::v4f32, Legal);
+ setOperationAction(ISD::FCEIL, MVT::v4f32, Legal);
+ setOperationAction(ISD::FTRUNC, MVT::v4f32, Legal);
+ setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal);
addRegisterClass(MVT::v4f32, &PPC::VRRCRegClass);
addRegisterClass(MVT::v4i32, &PPC::VRRCRegClass);
diff --git a/lib/Target/PowerPC/PPCInstrAltivec.td b/lib/Target/PowerPC/PPCInstrAltivec.td
index ba58c3e..87758e9 100644
--- a/lib/Target/PowerPC/PPCInstrAltivec.td
+++ b/lib/Target/PowerPC/PPCInstrAltivec.td
@@ -721,3 +721,13 @@
(VCFSX_0 VRRC:$vA)>;
def : Pat<(v4f32 (uint_to_fp (v4i32 VRRC:$vA))),
(VCFUX_0 VRRC:$vA)>;
+
+// Floating-point rounding
+def : Pat<(v4f32 (ffloor (v4f32 VRRC:$vA))),
+ (VRFIM VRRC:$vA)>;
+def : Pat<(v4f32 (fceil (v4f32 VRRC:$vA))),
+ (VRFIP VRRC:$vA)>;
+def : Pat<(v4f32 (ftrunc (v4f32 VRRC:$vA))),
+ (VRFIZ VRRC:$vA)>;
+def : Pat<(v4f32 (fnearbyint (v4f32 VRRC:$vA))),
+ (VRFIN VRRC:$vA)>;