From c8885129d89c09d2fd592db07b1193276bc2f52b Mon Sep 17 00:00:00 2001
From: Sanjiv Gupta <sanjiv.gupta@microchip.com>
Date: Mon, 27 Jul 2009 02:44:46 +0000
Subject: [PATCH] Generate a libcall for i8 multiply.

llvm-svn: 77179
---
 llvm/lib/Target/PIC16/PIC16ISelLowering.cpp | 15 +++++++++++++++
 llvm/lib/Target/PIC16/PIC16ISelLowering.h   |  1 +
 2 files changed, 16 insertions(+)

diff --git a/llvm/lib/Target/PIC16/PIC16ISelLowering.cpp b/llvm/lib/Target/PIC16/PIC16ISelLowering.cpp
index 5949b7b..13d9654 100644
--- a/llvm/lib/Target/PIC16/PIC16ISelLowering.cpp
+++ b/llvm/lib/Target/PIC16/PIC16ISelLowering.cpp
@@ -928,6 +928,19 @@ SDValue PIC16TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) {
   return Call;
 }
 
+SDValue PIC16TargetLowering::LowerMUL(SDValue Op, SelectionDAG &DAG) {
+  // We should have handled larger operands in type legalizer itself.
+  assert (Op.getValueType() == MVT::i8 && "illegal multiply to lower");
+
+  SDNode *N = Op.getNode();
+  SmallVector<SDValue, 2> Ops(2);
+  Ops[0] = N->getOperand(0);
+  Ops[1] = N->getOperand(1);
+  SDValue Call = MakePIC16Libcall(PIC16ISD::MUL_I8, N->getValueType(0), 
+                                  &Ops[0], 2, true, DAG, N->getDebugLoc());
+  return Call;
+}
+
 void
 PIC16TargetLowering::LowerOperationWrapper(SDNode *N,
                                            SmallVectorImpl<SDValue>&Results,
@@ -975,6 +988,8 @@ SDValue PIC16TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) {
       return ExpandLoad(Op.getNode(), DAG);
     case ISD::STORE:
       return ExpandStore(Op.getNode(), DAG);
+    case ISD::MUL:
+      return LowerMUL(Op, DAG);
     case ISD::SHL:
     case ISD::SRA:
     case ISD::SRL:
diff --git a/llvm/lib/Target/PIC16/PIC16ISelLowering.h b/llvm/lib/Target/PIC16/PIC16ISelLowering.h
index b40ea12..69cc270 100644
--- a/llvm/lib/Target/PIC16/PIC16ISelLowering.h
+++ b/llvm/lib/Target/PIC16/PIC16ISelLowering.h
@@ -84,6 +84,7 @@ namespace llvm {
     virtual MVT getSetCCResultType(MVT ValType) const;
     SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
     SDValue LowerShift(SDValue Op, SelectionDAG &DAG);
+    SDValue LowerMUL(SDValue Op, SelectionDAG &DAG);
     SDValue LowerADD(SDValue Op, SelectionDAG &DAG);
     SDValue LowerSUB(SDValue Op, SelectionDAG &DAG);
     SDValue LowerBinOp(SDValue Op, SelectionDAG &DAG);
-- 
2.7.4