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Codegen support for i128 SINT_TO_FP.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47928 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-03-05 01:08:17 +00:00
parent 6130f66eaa
commit d91446de7a
4 changed files with 60 additions and 21 deletions
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4
include/llvm/CodeGen/RuntimeLibcalls.h
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@ -110,6 +110,10 @@ namespace RTLIB {
SINTTOFP_I64_F64,
SINTTOFP_I64_F80,
SINTTOFP_I64_PPCF128,
SINTTOFP_I128_F32,
SINTTOFP_I128_F64,
SINTTOFP_I128_F80,
SINTTOFP_I128_PPCF128,
UINTTOFP_I32_F32,
UINTTOFP_I32_F64,
UINTTOFP_I64_F32,

44
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -5275,12 +5275,12 @@ SDOperand SelectionDAGLegalize::ExpandLibCall(const char *Name, SDNode *Node,
///
SDOperand SelectionDAGLegalize::
ExpandIntToFP(bool isSigned, MVT::ValueType DestTy, SDOperand Source) {
assert(getTypeAction(Source.getValueType()) == Expand &&
MVT::ValueType SourceVT = Source.getValueType();
assert(getTypeAction(SourceVT) == Expand &&
"This is not an expansion!");
assert(Source.getValueType() == MVT::i64 && "Only handle expand from i64!");
if (!isSigned) {
assert(Source.getValueType() == MVT::i64 &&
assert(SourceVT == MVT::i64 &&
"This only works for 64-bit -> FP");
// The 64-bit value loaded will be incorrectly if the 'sign bit' of the
// incoming integer is set. To handle this, we dynamically test to see if
@ -5291,7 +5291,7 @@ ExpandIntToFP(bool isSigned, MVT::ValueType DestTy, SDOperand Source) {
// If this is unsigned, and not supported, first perform the conversion to
// signed, then adjust the result if the sign bit is set.
SDOperand SignedConv = ExpandIntToFP(true, DestTy,
DAG.getNode(ISD::BUILD_PAIR, Source.getValueType(), Lo, Hi));
DAG.getNode(ISD::BUILD_PAIR, SourceVT, Lo, Hi));
SDOperand SignSet = DAG.getSetCC(TLI.getSetCCResultTy(), Hi,
DAG.getConstant(0, Hi.getValueType()),
@ -5301,7 +5301,8 @@ ExpandIntToFP(bool isSigned, MVT::ValueType DestTy, SDOperand Source) {
SignSet, Four, Zero);
uint64_t FF = 0x5f800000ULL;
if (TLI.isLittleEndian()) FF <<= 32;
static Constant *FudgeFactor = ConstantInt::get(Type::Int64Ty, FF);
static Constant *FudgeFactor =
ConstantInt::get(IntegerType::get(Source.getValueSizeInBits()), FF);
SDOperand CPIdx = DAG.getConstantPool(FudgeFactor, TLI.getPointerTy());
CPIdx = DAG.getNode(ISD::ADD, TLI.getPointerTy(), CPIdx, CstOffset);
@ -5323,8 +5324,8 @@ ExpandIntToFP(bool isSigned, MVT::ValueType DestTy, SDOperand Source) {
// Destination type needs to be expanded as well. The FADD now we are
// constructing will be expanded into a libcall.
if (MVT::getSizeInBits(SCVT) != MVT::getSizeInBits(DestTy)) {
assert(SCVT == MVT::i32 && DestTy == MVT::f64);
SignedConv = DAG.getNode(ISD::BUILD_PAIR, MVT::i64,
assert(MVT::getSizeInBits(SCVT) * 2 == MVT::getSizeInBits(DestTy));
SignedConv = DAG.getNode(ISD::BUILD_PAIR, DestTy,
SignedConv, SignedConv.getValue(1));
}
SignedConv = DAG.getNode(ISD::BIT_CONVERT, DestTy, SignedConv);
@ -5333,7 +5334,7 @@ ExpandIntToFP(bool isSigned, MVT::ValueType DestTy, SDOperand Source) {
}
// Check to see if the target has a custom way to lower this. If so, use it.
switch (TLI.getOperationAction(ISD::SINT_TO_FP, Source.getValueType())) {
switch (TLI.getOperationAction(ISD::SINT_TO_FP, SourceVT)) {
default: assert(0 && "This action not implemented for this operation!");
case TargetLowering::Legal:
case TargetLowering::Expand:
@ -5351,14 +5352,29 @@ ExpandIntToFP(bool isSigned, MVT::ValueType DestTy, SDOperand Source) {
// the source in case it is shared (this pass of legalize must traverse it).
SDOperand SrcLo, SrcHi;
ExpandOp(Source, SrcLo, SrcHi);
Source = DAG.getNode(ISD::BUILD_PAIR, Source.getValueType(), SrcLo, SrcHi);
Source = DAG.getNode(ISD::BUILD_PAIR, SourceVT, SrcLo, SrcHi);
RTLIB::Libcall LC;
if (DestTy == MVT::f32)
LC = RTLIB::SINTTOFP_I64_F32;
else {
assert(DestTy == MVT::f64 && "Unknown fp value type!");
LC = RTLIB::SINTTOFP_I64_F64;
if (SourceVT == MVT::i64) {
if (DestTy == MVT::f32)
LC = RTLIB::SINTTOFP_I64_F32;
else {
assert(DestTy == MVT::f64 && "Unknown fp value type!");
LC = RTLIB::SINTTOFP_I64_F64;
}
} else if (SourceVT == MVT::i128) {
if (DestTy == MVT::f32)
LC = RTLIB::SINTTOFP_I128_F32;
else if (DestTy == MVT::f64)
LC = RTLIB::SINTTOFP_I128_F64;
else if (DestTy == MVT::f80)
LC = RTLIB::SINTTOFP_I128_F80;
else {
assert(DestTy == MVT::ppcf128 && "Unknown fp value type!");
LC = RTLIB::SINTTOFP_I128_PPCF128;
}
} else {
assert(0 && "Unknown int value type");
}
assert(TLI.getLibcallName(LC) && "Don't know how to expand this SINT_TO_FP!");

29
lib/CodeGen/SelectionDAG/LegalizeTypesExpand.cpp
View File

@ -967,10 +967,10 @@ SDOperand DAGTypeLegalizer::ExpandOperand_BIT_CONVERT(SDNode *N) {
SDOperand DAGTypeLegalizer::ExpandOperand_SINT_TO_FP(SDOperand Source,
MVT::ValueType DestTy) {
// We know the destination is legal, but that the input needs to be expanded.
assert(Source.getValueType() == MVT::i64 && "Only handle expand from i64!");
MVT::ValueType SourceVT = Source.getValueType();
// Check to see if the target has a custom way to lower this. If so, use it.
switch (TLI.getOperationAction(ISD::SINT_TO_FP, Source.getValueType())) {
switch (TLI.getOperationAction(ISD::SINT_TO_FP, SourceVT)) {
default: assert(0 && "This action not implemented for this operation!");
case TargetLowering::Legal:
case TargetLowering::Expand:
@ -983,11 +983,26 @@ SDOperand DAGTypeLegalizer::ExpandOperand_SINT_TO_FP(SDOperand Source,
}
RTLIB::Libcall LC;
if (DestTy == MVT::f32)
LC = RTLIB::SINTTOFP_I64_F32;
else {
assert(DestTy == MVT::f64 && "Unknown fp value type!");
LC = RTLIB::SINTTOFP_I64_F64;
if (SourceVT == MVT::i64) {
if (DestTy == MVT::f32)
LC = RTLIB::SINTTOFP_I64_F32;
else {
assert(DestTy == MVT::f64 && "Unknown fp value type!");
LC = RTLIB::SINTTOFP_I64_F64;
}
} else if (SourceVT == MVT::i128) {
if (DestTy == MVT::f32)
LC = RTLIB::SINTTOFP_I128_F32;
else if (DestTy == MVT::f64)
LC = RTLIB::SINTTOFP_I128_F64;
else if (DestTy == MVT::f80)
LC = RTLIB::SINTTOFP_I128_F80;
else {
assert(DestTy == MVT::ppcf128 && "Unknown fp value type!");
LC = RTLIB::SINTTOFP_I128_PPCF128;
}
} else {
assert(0 && "Unknown int value type!");
}
assert(0 && "FIXME: no libcalls yet!");

4
lib/CodeGen/SelectionDAG/TargetLowering.cpp
View File

@ -107,6 +107,10 @@ static void InitLibcallNames(const char **Names) {
Names[RTLIB::SINTTOFP_I64_F64] = "__floatdidf";
Names[RTLIB::SINTTOFP_I64_F80] = "__floatdixf";
Names[RTLIB::SINTTOFP_I64_PPCF128] = "__floatditf";
Names[RTLIB::SINTTOFP_I128_F32] = "__floattisf";
Names[RTLIB::SINTTOFP_I128_F64] = "__floattidf";
Names[RTLIB::SINTTOFP_I128_F80] = "__floattixf";
Names[RTLIB::SINTTOFP_I128_PPCF128] = "__floattitf";
Names[RTLIB::UINTTOFP_I32_F32] = "__floatunsisf";
Names[RTLIB::UINTTOFP_I32_F64] = "__floatunsidf";
Names[RTLIB::UINTTOFP_I64_F32] = "__floatundisf";