[PATCH] D65808: [ARM] Select VFMA

[Sam Tebbs via Phabricator via llvm-commits]

samtebbs updated this revision to Diff 213870.
samtebbs marked 5 inline comments as done.
samtebbs edited the summary of this revision.

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D65808/new/

https://reviews.llvm.org/D65808

Files:
  llvm/lib/Target/ARM/ARMInstrMVE.td
  llvm/test/CodeGen/Thumb2/mve-vfma.ll


Index: llvm/test/CodeGen/Thumb2/mve-vfma.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/Thumb2/mve-vfma.ll
@@ -0,0 +1,24 @@
+; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+mve.fp %s -o - | FileCheck %s
+
+define arm_aapcs_vfpcc <4 x float> @fma_v4f32(<4 x float> %dst, <4 x float> %s1, <4 x float> %s2) {
+; CHECK-LABEL: fma_v4f32:
+; CHECK:       @ %bb.0: @ %entry
+; CHECK-NEXT:    vfma.f32 q0, q1, q2
+; CHECK-NEXT:    bx lr
+entry:
+  %0 = tail call fast <4 x float> @llvm.fma.v4f32(<4 x float> %s1, <4 x float> %s2, <4 x float> %dst)
+  ret <4 x float> %0
+}
+
+define arm_aapcs_vfpcc <8 x half> @fma_v8f16(<8 x half> %dst, <8 x half> %s1, <8 x half> %s2) {
+; CHECK-LABEL: fma_v8f16:
+; CHECK:       @ %bb.0: @ %entry
+; CHECK-NEXT:    vfma.f16 q0, q1, q2
+; CHECK-NEXT:    bx lr
+entry:
+  %0 = tail call fast <8 x half> @llvm.fma.v8f16(<8 x half> %s1, <8 x half> %s2, <8 x half> %dst)
+  ret <8 x half> %0
+}
+
+declare <4 x float> @llvm.fma.v4f32(<4 x float>, <4 x float>, <4 x float>)
+declare <8 x half> @llvm.fma.v8f16(<8 x half>, <8 x half>, <8 x half>)
Index: llvm/lib/Target/ARM/ARMInstrMVE.td
===================================================================
--- llvm/lib/Target/ARM/ARMInstrMVE.td
+++ llvm/lib/Target/ARM/ARMInstrMVE.td
@@ -2592,6 +2592,13 @@
             (v4f32 (MVE_VFMSf32 $src1, $src2, $src3))>;
 }
 
+let Predicates = [HasMVEFloat] in {
+  def : Pat<(v8f16 (fma (v8f16 MQPR:$src1), (v8f16 MQPR:$src2), (v8f16 MQPR:$src3))),
+            (v8f16 (MVE_VFMAf16 $src3, $src1, $src2))>;
+  def : Pat<(v4f32 (fma (v4f32 MQPR:$src1), (v4f32 MQPR:$src2), (v4f32 MQPR:$src3))),
+            (v4f32 (MVE_VFMAf32 $src3, $src1, $src2))>;
+}
+
 
 def MVE_VADDf32 : MVE_VADDSUBFMA_fp<"vadd", "f32", 0b0, 0b0, 0b1, 0b0>;
 def MVE_VADDf16 : MVE_VADDSUBFMA_fp<"vadd", "f16", 0b1, 0b0, 0b1, 0b0>;


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