Added support for SELECT v8i8 v4i16 for X86 (MMX)

Added support for TRUNC v8i16 to v8i8 for X86 (MMX)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60916 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 23 insertions, 0 deletions

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 405aec6..2108abf 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -3937,6 +3937,10 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) {
           if (Tmp1.getNode()) Result = Tmp1;
         }
         break;
+      case TargetLowering::Expand:
+        assert(Result.getValueType().isVector() && "must be vector type");
+        // Unroll the truncate.  We should do better.
+        Result = LegalizeOp(UnrollVectorOp(Result));
       }
       break;
     case Expand:
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 496112d..fd57ccf 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -650,6 +650,13 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
     setOperationAction(ISD::SCALAR_TO_VECTOR,   MVT::v1i64, Custom);
 
     setOperationAction(ISD::INSERT_VECTOR_ELT,  MVT::v4i16, Custom);
+
+    setTruncStoreAction(MVT::v8i16, MVT::v8i8, Expand);
+    setOperationAction(ISD::TRUNCATE,           MVT::v8i8, Expand);
+    setOperationAction(ISD::SELECT,             MVT::v8i8, Promote);
+    setOperationAction(ISD::SELECT,             MVT::v4i16, Promote);
+    setOperationAction(ISD::SELECT,             MVT::v2i32, Promote);
+    setOperationAction(ISD::SELECT,             MVT::v1i64, Custom);
   }
 
   if (Subtarget->hasSSE1()) {
@@ -6960,6 +6967,7 @@ X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
   const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
   switch (MI->getOpcode()) {
   default: assert(false && "Unexpected instr type to insert");
+  case X86::CMOV_V1I64:
   case X86::CMOV_FR32:
   case X86::CMOV_FR64:
   case X86::CMOV_V4F32:
diff --git a/lib/Target/X86/X86InstrMMX.td b/lib/Target/X86/X86InstrMMX.td
index fd70801..62055c0 100644
--- a/lib/Target/X86/X86InstrMMX.td
+++ b/lib/Target/X86/X86InstrMMX.td
@@ -681,3 +681,14 @@ def : Pat<(v8i8 (bitconvert (i64 (vector_extract (v2i64 VR128:$src),
                                                   (iPTR 0))))),
           (v8i8 (MMX_MOVDQ2Qrr VR128:$src))>;
 
+// CMOV* - Used to implement the SELECT DAG operation.  Expanded by the
+// scheduler into a branch sequence.
+// These are expanded by the scheduler.
+let Uses = [EFLAGS], usesCustomDAGSchedInserter = 1 in {
+  def CMOV_V1I64 : I<0, Pseudo,
+                    (outs VR64:$dst), (ins VR64:$t, VR64:$f, i8imm:$cond),
+                    "#CMOV_V1I64 PSEUDO!",
+                    [(set VR64:$dst,
+                      (v1i64 (X86cmov VR64:$t, VR64:$f, imm:$cond,
+                                          EFLAGS)))]>;
+}