[X86] Break out logic to map FMA Intrinsic number to Opcode

No functional change.  Will be used to lower AVX512 masking FMA intrinsics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215663 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index c1c56cab50ceb47a262a5a297d399bfa4ca08d4b..fad4d24a66b385b6cc848ef7d38ff6032d390c27 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -14239,6 +14239,54 @@ static SDValue getVectorMaskingNode(SDValue Op, SDValue Mask,
                        Op, PreservedSrc);
 }
 
+static unsigned getOpcodeForFMAIntrinsic(unsigned IntNo) {
+    switch (IntNo) {
+    default: llvm_unreachable("Impossible intrinsic");  // Can't reach here.
+    case Intrinsic::x86_fma_vfmadd_ps:
+    case Intrinsic::x86_fma_vfmadd_pd:
+    case Intrinsic::x86_fma_vfmadd_ps_256:
+    case Intrinsic::x86_fma_vfmadd_pd_256:
+    case Intrinsic::x86_fma_vfmadd_ps_512:
+    case Intrinsic::x86_fma_vfmadd_pd_512:
+      return X86ISD::FMADD;
+    case Intrinsic::x86_fma_vfmsub_ps:
+    case Intrinsic::x86_fma_vfmsub_pd:
+    case Intrinsic::x86_fma_vfmsub_ps_256:
+    case Intrinsic::x86_fma_vfmsub_pd_256:
+    case Intrinsic::x86_fma_vfmsub_ps_512:
+    case Intrinsic::x86_fma_vfmsub_pd_512:
+      return X86ISD::FMSUB;
+    case Intrinsic::x86_fma_vfnmadd_ps:
+    case Intrinsic::x86_fma_vfnmadd_pd:
+    case Intrinsic::x86_fma_vfnmadd_ps_256:
+    case Intrinsic::x86_fma_vfnmadd_pd_256:
+    case Intrinsic::x86_fma_vfnmadd_ps_512:
+    case Intrinsic::x86_fma_vfnmadd_pd_512:
+      return X86ISD::FNMADD;
+    case Intrinsic::x86_fma_vfnmsub_ps:
+    case Intrinsic::x86_fma_vfnmsub_pd:
+    case Intrinsic::x86_fma_vfnmsub_ps_256:
+    case Intrinsic::x86_fma_vfnmsub_pd_256:
+    case Intrinsic::x86_fma_vfnmsub_ps_512:
+    case Intrinsic::x86_fma_vfnmsub_pd_512:
+      return X86ISD::FNMSUB;
+    case Intrinsic::x86_fma_vfmaddsub_ps:
+    case Intrinsic::x86_fma_vfmaddsub_pd:
+    case Intrinsic::x86_fma_vfmaddsub_ps_256:
+    case Intrinsic::x86_fma_vfmaddsub_pd_256:
+    case Intrinsic::x86_fma_vfmaddsub_ps_512:
+    case Intrinsic::x86_fma_vfmaddsub_pd_512:
+      return X86ISD::FMADDSUB;
+    case Intrinsic::x86_fma_vfmsubadd_ps:
+    case Intrinsic::x86_fma_vfmsubadd_pd:
+    case Intrinsic::x86_fma_vfmsubadd_ps_256:
+    case Intrinsic::x86_fma_vfmsubadd_pd_256:
+    case Intrinsic::x86_fma_vfmsubadd_ps_512:
+    case Intrinsic::x86_fma_vfmsubadd_pd_512:
+      return X86ISD::FMSUBADD;
+    }
+}
+
 static SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) {
   SDLoc dl(Op);
   unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
@@ -14906,63 +14954,9 @@ static SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) {
   case Intrinsic::x86_fma_vfmaddsub_ps_512:
   case Intrinsic::x86_fma_vfmaddsub_pd_512:
   case Intrinsic::x86_fma_vfmsubadd_ps_512:
-  case Intrinsic::x86_fma_vfmsubadd_pd_512: {
-    unsigned Opc;
-    switch (IntNo) {
-    default: llvm_unreachable("Impossible intrinsic");  // Can't reach here.
-    case Intrinsic::x86_fma_vfmadd_ps:
-    case Intrinsic::x86_fma_vfmadd_pd:
-    case Intrinsic::x86_fma_vfmadd_ps_256:
-    case Intrinsic::x86_fma_vfmadd_pd_256:
-    case Intrinsic::x86_fma_vfmadd_ps_512:
-    case Intrinsic::x86_fma_vfmadd_pd_512:
-      Opc = X86ISD::FMADD;
-      break;
-    case Intrinsic::x86_fma_vfmsub_ps:
-    case Intrinsic::x86_fma_vfmsub_pd:
-    case Intrinsic::x86_fma_vfmsub_ps_256:
-    case Intrinsic::x86_fma_vfmsub_pd_256:
-    case Intrinsic::x86_fma_vfmsub_ps_512:
-    case Intrinsic::x86_fma_vfmsub_pd_512:
-      Opc = X86ISD::FMSUB;
-      break;
-    case Intrinsic::x86_fma_vfnmadd_ps:
-    case Intrinsic::x86_fma_vfnmadd_pd:
-    case Intrinsic::x86_fma_vfnmadd_ps_256:
-    case Intrinsic::x86_fma_vfnmadd_pd_256:
-    case Intrinsic::x86_fma_vfnmadd_ps_512:
-    case Intrinsic::x86_fma_vfnmadd_pd_512:
-      Opc = X86ISD::FNMADD;
-      break;
-    case Intrinsic::x86_fma_vfnmsub_ps:
-    case Intrinsic::x86_fma_vfnmsub_pd:
-    case Intrinsic::x86_fma_vfnmsub_ps_256:
-    case Intrinsic::x86_fma_vfnmsub_pd_256:
-    case Intrinsic::x86_fma_vfnmsub_ps_512:
-    case Intrinsic::x86_fma_vfnmsub_pd_512:
-      Opc = X86ISD::FNMSUB;
-      break;
-    case Intrinsic::x86_fma_vfmaddsub_ps:
-    case Intrinsic::x86_fma_vfmaddsub_pd:
-    case Intrinsic::x86_fma_vfmaddsub_ps_256:
-    case Intrinsic::x86_fma_vfmaddsub_pd_256:
-    case Intrinsic::x86_fma_vfmaddsub_ps_512:
-    case Intrinsic::x86_fma_vfmaddsub_pd_512:
-      Opc = X86ISD::FMADDSUB;
-      break;
-    case Intrinsic::x86_fma_vfmsubadd_ps:
-    case Intrinsic::x86_fma_vfmsubadd_pd:
-    case Intrinsic::x86_fma_vfmsubadd_ps_256:
-    case Intrinsic::x86_fma_vfmsubadd_pd_256:
-    case Intrinsic::x86_fma_vfmsubadd_ps_512:
-    case Intrinsic::x86_fma_vfmsubadd_pd_512:
-      Opc = X86ISD::FMSUBADD;
-      break;
-    }
-
-    return DAG.getNode(Opc, dl, Op.getValueType(), Op.getOperand(1),
-                       Op.getOperand(2), Op.getOperand(3));
-  }
+  case Intrinsic::x86_fma_vfmsubadd_pd_512:
+    return DAG.getNode(getOpcodeForFMAIntrinsic(IntNo), dl, Op.getValueType(),
+                       Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
   }
 }