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Preliminary soft float support.

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llvm-svn: 32394
This commit is contained in:
Evan Cheng 2006-12-09 02:42:38 +00:00
parent f1e9ec7225
commit a366d082b5
3 changed files with 74 additions and 19 deletions
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35
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -4351,9 +4351,8 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
MVT::ValueType NVT = TLI.getTypeToTransformTo(VT);
SDNode *Node = Op.Val;
assert(getTypeAction(VT) == Expand && "Not an expanded type!");
assert((MVT::isInteger(VT) || VT == MVT::Vector) &&
"Cannot expand FP values!");
assert(((MVT::isInteger(NVT) && NVT < VT) || VT == MVT::Vector) &&
assert(((MVT::isInteger(NVT) && NVT < VT) || MVT::isFloatingPoint(VT) ||
VT == MVT::Vector) &&
"Cannot expand to FP value or to larger int value!");
// See if we already expanded it.
@ -4583,9 +4582,18 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
Tmp = TLI.LowerOperation(DAG.getNode(ISD::BIT_CONVERT, VT, Tmp), DAG);
}
MVT::ValueType NVT = Node->getValueType(0);
// f32 / f64 must be expanded to i32 / i64.
if (NVT == MVT::f32 || NVT == MVT::f64) {
Lo = DAG.getNode(ISD::BIT_CONVERT, TLI.getTypeToTransformTo(NVT),
Node->getOperand(0));
Hi = DAG.getConstant(0, TLI.getTypeToTransformTo(NVT));
break;
}
// Turn this into a load/store pair by default.
if (Tmp.Val == 0)
Tmp = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0));
Tmp = ExpandBIT_CONVERT(NVT, Node->getOperand(0));
ExpandOp(Tmp, Lo, Hi);
break;
@ -4858,6 +4866,25 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
case ISD::UDIV: Lo = ExpandLibCall("__udivdi3", Node, Hi); break;
case ISD::SREM: Lo = ExpandLibCall("__moddi3" , Node, Hi); break;
case ISD::UREM: Lo = ExpandLibCall("__umoddi3", Node, Hi); break;
case ISD::FADD:
Lo = ExpandLibCall(((VT == MVT::f32) ? "__addsf3" : "__adddf3"), Node, Hi);
break;
case ISD::FSUB:
Lo = ExpandLibCall(((VT == MVT::f32) ? "__subsf3" : "__subdf3"), Node, Hi);
break;
case ISD::FMUL:
Lo = ExpandLibCall(((VT == MVT::f32) ? "__mulsf3" : "__muldf3"), Node, Hi);
break;
case ISD::FDIV:
Lo = ExpandLibCall(((VT == MVT::f32) ? "__divsf3" : "__divdf3"), Node, Hi);
break;
case ISD::FP_EXTEND:
Lo = ExpandLibCall("__extendsfdf2", Node, Hi);
break;
case ISD::FP_ROUND:
Lo = ExpandLibCall("__truncdfsf2", Node, Hi);
break;
}
// Make sure the resultant values have been legalized themselves, unless this

15
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -2954,7 +2954,10 @@ TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
// integers it is.
MVT::ValueType NVT = getTypeToTransformTo(VT);
unsigned NumVals = MVT::getSizeInBits(VT)/MVT::getSizeInBits(NVT);
if (NumVals == 2) {
if (NumVals == 1) {
SDOperand Tmp = SDOperand(Result, i++);
Ops.push_back(DAG.getNode(ISD::BIT_CONVERT, VT, Tmp));
} else if (NumVals == 2) {
SDOperand Lo = SDOperand(Result, i++);
SDOperand Hi = SDOperand(Result, i++);
@ -3040,7 +3043,10 @@ TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg,
// integers it is.
MVT::ValueType NVT = getTypeToTransformTo(VT);
unsigned NumVals = MVT::getSizeInBits(VT)/MVT::getSizeInBits(NVT);
if (NumVals == 2) {
if (NumVals == 1) {
Ops.push_back(DAG.getNode(ISD::BIT_CONVERT, VT, Op));
Ops.push_back(DAG.getConstant(isSigned, MVT::i32));
} else if (NumVals == 2) {
SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, NVT, Op,
DAG.getConstant(0, getPointerTy()));
SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, NVT, Op,
@ -3166,7 +3172,10 @@ TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg,
ResVal = DAG.getNode(ISD::TRUNCATE, VT, ResVal);
} else {
assert(MVT::isFloatingPoint(VT));
ResVal = DAG.getNode(ISD::FP_ROUND, VT, ResVal);
if (getTypeAction(VT) == Expand)
ResVal = DAG.getNode(ISD::BIT_CONVERT, VT, ResVal);
else
ResVal = DAG.getNode(ISD::FP_ROUND, VT, ResVal);
}
}
} else if (RetTys.size() == 3) {

43
lib/CodeGen/SelectionDAG/TargetLowering.cpp
View File

@ -86,10 +86,17 @@ static void SetValueTypeAction(MVT::ValueType VT,
assert(VT < PromoteTo && "Must promote to a larger type!");
TransformToType[VT] = PromoteTo;
} else if (Action == TargetLowering::Expand) {
assert((VT == MVT::Vector || MVT::isInteger(VT)) && VT > MVT::i8 &&
"Cannot expand this type: target must support SOME integer reg!");
// Expand to the next smaller integer type!
TransformToType[VT] = (MVT::ValueType)(VT-1);
// f32 and f64 is each expanded to corresponding integer type of same size.
if (VT == MVT::f32)
TransformToType[VT] = MVT::i32;
else if (VT == MVT::f64)
TransformToType[VT] = MVT::i64;
else {
assert((VT == MVT::Vector || MVT::isInteger(VT)) && VT > MVT::i8 &&
"Cannot expand this type: target must support SOME integer reg!");
// Expand to the next smaller integer type!
TransformToType[VT] = (MVT::ValueType)(VT-1);
}
}
}
@ -129,12 +136,27 @@ void TargetLowering::computeRegisterProperties() {
else
TransformToType[(MVT::ValueType)IntReg] = (MVT::ValueType)IntReg;
// If the target does not have native support for F32, promote it to F64.
if (!isTypeLegal(MVT::f32))
SetValueTypeAction(MVT::f32, Promote, *this,
TransformToType, ValueTypeActions);
else
// If the target does not have native F64 support, expand it to I64. We will
// be generating soft float library calls. If the target does not have native
// support for F32, promote it to F64 if it is legal. Otherwise, expand it to
// I32.
if (isTypeLegal(MVT::f64))
TransformToType[MVT::f64] = MVT::f64;
else {
NumElementsForVT[MVT::f64] = NumElementsForVT[MVT::i64];
SetValueTypeAction(MVT::f64, Expand, *this, TransformToType,
ValueTypeActions);
}
if (isTypeLegal(MVT::f32))
TransformToType[MVT::f32] = MVT::f32;
else if (isTypeLegal(MVT::f64))
SetValueTypeAction(MVT::f32, Promote, *this, TransformToType,
ValueTypeActions);
else {
NumElementsForVT[MVT::f32] = NumElementsForVT[MVT::i32];
SetValueTypeAction(MVT::f32, Expand, *this, TransformToType,
ValueTypeActions);
}
// Set MVT::Vector to always be Expanded
SetValueTypeAction(MVT::Vector, Expand, *this, TransformToType,
@ -147,9 +169,6 @@ void TargetLowering::computeRegisterProperties() {
if (isTypeLegal((MVT::ValueType)i))
TransformToType[i] = (MVT::ValueType)i;
}
assert(isTypeLegal(MVT::f64) && "Target does not support FP?");
TransformToType[MVT::f64] = MVT::f64;
}
const char *TargetLowering::getTargetNodeName(unsigned Opcode) const {