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try custom expanders, doesn't seem to expand yet, so disabled

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llvm-svn: 22188
This commit is contained in:
Andrew Lenharth 2005-05-31 19:49:34 +00:00
parent ca6fa6fac6
commit d8c567af19
1 changed files with 61 additions and 0 deletions
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61
lib/Target/Alpha/AlphaISelPattern.cpp
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@ -47,6 +47,24 @@ namespace llvm {
cl::Hidden);
}
namespace {
// Alpha Specific DAG Nodes
namespace AlphaISD {
enum NodeType {
// Start the numbering where the builtin ops leave off.
FIRST_NUMBER = ISD::BUILTIN_OP_END,
//Convert an int bit pattern in an FP reg to a Double or Float
//Has a dest type and a source
CVTQ,
//Move an Ireg to a FPreg
ITOF,
//Move a FPreg to an Ireg
FTOI,
};
}
}
//===----------------------------------------------------------------------===//
// AlphaTargetLowering - Alpha Implementation of the TargetLowering interface
namespace {
@ -104,12 +122,19 @@ namespace {
//Doesn't work yet
setOperationAction(ISD::SETCC, MVT::f32, Promote);
//Try a couple things with a custom expander
//setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
computeRegisterProperties();
addLegalFPImmediate(+0.0); //F31
addLegalFPImmediate(-0.0); //-F31
}
/// LowerOperation - Provide custom lowering hooks for some operations.
///
virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
/// LowerArguments - This hook must be implemented to indicate how we should
/// lower the arguments for the specified function, into the specified DAG.
virtual std::vector<SDOperand>
@ -140,6 +165,42 @@ namespace {
};
}
/// LowerOperation - Provide custom lowering hooks for some operations.
///
SDOperand AlphaTargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
MachineFunction &MF = DAG.getMachineFunction();
switch (Op.getOpcode()) {
default: assert(0 && "Should not custom lower this!");
// case ISD::SINT_TO_FP:
// {
// assert (Op.getOperand(0).getValueType() == MVT::i64
// && "only quads can be loaded from");
// SDOperand SRC;
// if (EnableAlphaFTOI)
// {
// std::vector<MVT::ValueType> RTs;
// RTs.push_back(Op.getValueType());
// std::vector<SDOperand> Ops;
// Ops.push_back(Op.getOperand(0));
// SRC = DAG.getNode(AlphaISD::ITOF, RTs, Ops);
// } else {
// int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
// SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
// SDOperand Store = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
// Op.getOperand(0), StackSlot, DAG.getSrcValue(NULL));
// SRC = DAG.getLoad(Op.getValueType(), Store.getValue(0), StackSlot,
// DAG.getSrcValue(NULL));
// }
// std::vector<MVT::ValueType> RTs;
// RTs.push_back(Op.getValueType());
// std::vector<SDOperand> Ops;
// Ops.push_back(SRC);
// return DAG.getNode(AlphaISD::CVTQ, RTs, Ops);
// }
}
}
/// AddLiveIn - This helper function adds the specified physical register to the
/// MachineFunction as a live in value. It also creates a corresponding virtual
/// register for it.