Add preliminary v2i32 support for SPU backend. As there are no

such registers in SPU, this support boils down to "emulating" 
them by duplicating instructions on the general purpose registers. 

This adds the most basic operations on v2i32: passing parameters,
addition, subtraction, multiplication and a few others.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110035 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 16 insertions, 3 deletions

diff --git a/lib/Target/CellSPU/SPUISelLowering.cpp b/lib/Target/CellSPU/SPUISelLowering.cpp
index ece19b9b89..bcde5794af 100644
--- a/lib/Target/CellSPU/SPUISelLowering.cpp
+++ b/lib/Target/CellSPU/SPUISelLowering.cpp
@@ -1067,6 +1067,7 @@ SPUTargetLowering::LowerFormalArguments(SDValue Chain,
       case MVT::v4i32:
       case MVT::v8i16:
       case MVT::v16i8:
+      case MVT::v2i32:
         ArgRegClass = &SPU::VECREGRegClass;
         break;
       }
@@ -1622,8 +1623,7 @@ LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) {
     return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, T, T, T, T);
   }
   case MVT::v2i32: {
-    SDValue T = DAG.getConstant(unsigned(SplatBits), VT.getVectorElementType());
-    return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, T, T);
+    return SDValue();
   }
   case MVT::v2i64: {
     return SPU::LowerV2I64Splat(VT, DAG, SplatBits, dl);
@@ -1768,6 +1768,9 @@ static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
   } else if (EltVT == MVT::i16) {
     V2EltIdx0 = 8;
     maskVT = MVT::v8i16;
+  } else if (VecVT == MVT::v2i32 || VecVT == MVT::v2f32 ) {
+    V2EltIdx0 = 2;
+    maskVT = MVT::v4i32;
   } else if (EltVT == MVT::i32 || EltVT == MVT::f32) {
     V2EltIdx0 = 4;
     maskVT = MVT::v4i32;
@@ -1847,6 +1850,15 @@ static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
       for (unsigned j = 0; j < BytesPerElement; ++j)
         ResultMask.push_back(DAG.getConstant(SrcElt*BytesPerElement+j,MVT::i8));
     }
+    // For half vectors padd the mask with zeros for the second half.
+    // This is needed because mask is assumed to be full vector elsewhere in 
+    // the SPU backend. 
+    if(VecVT == MVT::v2i32 || VecVT == MVT::v2f32)
+    for( unsigned i = 0; i < 2; ++i )
+    {
+      for (unsigned j = 0; j < BytesPerElement; ++j)
+        ResultMask.push_back(DAG.getConstant(0,MVT::i8));
+    }
 
     SDValue VPermMask = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v16i8,
                                     &ResultMask[0], ResultMask.size());
@@ -1877,6 +1889,7 @@ static SDValue LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) {
     case MVT::v4f32: n_copies = 4; VT = MVT::f32; break;
     case MVT::v2i64: n_copies = 2; VT = MVT::i64; break;
     case MVT::v2f64: n_copies = 2; VT = MVT::f64; break;
+    case MVT::v2i32: n_copies = 2; VT = MVT::i32; break;
     }
 
     SDValue CValue = DAG.getConstant(CN->getZExtValue(), VT);
@@ -1997,7 +2010,7 @@ static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
     // Variable index: Rotate the requested element into slot 0, then replicate
     // slot 0 across the vector
     EVT VecVT = N.getValueType();
-    if (!VecVT.isSimple() || !VecVT.isVector() || !VecVT.is128BitVector()) {
+    if (!VecVT.isSimple() || !VecVT.isVector()) {
       report_fatal_error("LowerEXTRACT_VECTOR_ELT: Must have a simple, 128-bit"
                         "vector type!");
     }