Add XCore intrinsic for crc8.

llvm-svn: 132340

llvm/include/llvm/IntrinsicsXCore.td

@@ -11,6 +11,9 @@
 let TargetPrefix = "xcore" in {  // All intrinsics start with "llvm.xcore.".
   // Miscellaneous instructions.
   def int_xcore_bitrev : Intrinsic<[llvm_i32_ty],[llvm_i32_ty],[IntrNoMem]>;
+  def int_xcore_crc8 : Intrinsic<[llvm_i32_ty, llvm_i32_ty],
+                                 [llvm_i32_ty,llvm_i32_ty,llvm_i32_ty],
+                                 [IntrNoMem]>;
   def int_xcore_crc32 : Intrinsic<[llvm_i32_ty],[llvm_i32_ty,llvm_i32_ty,llvm_i32_ty],[IntrNoMem]>;
   def int_xcore_getid : Intrinsic<[llvm_i32_ty],[],[IntrNoMem]>;
   def int_xcore_getps : Intrinsic<[llvm_i32_ty],[llvm_i32_ty]>;

llvm/lib/Target/XCore/XCoreISelDAGToDAG.cpp

@@ -205,6 +205,16 @@ SDNode *XCoreDAGToDAGISel::Select(SDNode *N) {
     return CurDAG->getMachineNode(XCore::LMUL_l6r, dl, MVT::i32, MVT::i32,
                                   Ops, 4);
   }
+  case ISD::INTRINSIC_WO_CHAIN: {
+    unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
+    switch (IntNo) {
+    case Intrinsic::xcore_crc8:
+      SDValue Ops[] = { N->getOperand(1), N->getOperand(2), N->getOperand(3) };
+      return CurDAG->getMachineNode(XCore::CRC8_l4r, dl, MVT::i32, MVT::i32,
+                                    Ops, 3);
+    }
+    break;
+  }
   case ISD::BRIND:
     if (SDNode *ResNode = SelectBRIND(N))
       return ResNode;

llvm/lib/Target/XCore/XCoreInstrInfo.td

@@ -504,6 +504,12 @@ def MACCS_l4r : _L4R<(outs GRRegs:$dst1, GRRegs:$dst2),
                     []>;
 }
 
+let Constraints = "$src1 = $dst1" in
+def CRC8_l4r : _L4R<(outs GRRegs:$dst1, GRRegs:$dst2),
+                    (ins GRRegs:$src1, GRRegs:$src2, GRRegs:$src3),
+                    "crc8 $dst1, $dst2, $src2, $src3",
+                    []>;
+
 // Five operand long
 
 def LADD_l5r : _L5R<(outs GRRegs:$dst1, GRRegs:$dst2),

llvm/test/CodeGen/XCore/misc-intrinsics.ll

@@ -1,6 +1,9 @@
 ; RUN: llc < %s -march=xcore | FileCheck %s
+%0 = type { i32, i32 }
+
 declare i32 @llvm.xcore.bitrev(i32)
 declare i32 @llvm.xcore.crc32(i32, i32, i32)
+declare %0 @llvm.xcore.crc8(i32, i32, i32)
 
 define i32 @bitrev(i32 %val) {
 ; CHECK: bitrev:
@@ -15,3 +18,10 @@ define i32 @crc32(i32 %crc, i32 %data, i32 %poly) {
 	%result = call i32 @llvm.xcore.crc32(i32 %crc, i32 %data, i32 %poly)
 	ret i32 %result
 }
+
+define %0 @crc8(i32 %crc, i32 %data, i32 %poly) {
+; CHECK: crc8:
+; CHECK: crc8 r0, r1, r1, r2
+	%result = call %0 @llvm.xcore.crc8(i32 %crc, i32 %data, i32 %poly)
+	ret %0 %result
+}