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Fix PR2667: add soft float support for sint_to_fp/uint_to_fp

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where the argument is an apint, or smaller than the minimum
size for which there is a libcall (i32). 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58994 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2008-11-10 17:36:26 +00:00
parent cff50d9e20
commit f509224510
3 changed files with 80 additions and 15 deletions
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37
lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
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@ -72,8 +72,8 @@ void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
case ISD::SINT_TO_FP: R = SoftenFloatRes_SINT_TO_FP(N); break;
case ISD::UINT_TO_FP: R = SoftenFloatRes_UINT_TO_FP(N); break;
case ISD::SINT_TO_FP:
case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
}
// If R is null, the sub-method took care of registering the result.
@ -213,6 +213,8 @@ SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
}
SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
assert(N->getOperand(1).getValueType() == MVT::i32 &&
"Unsupported power type!");
MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
return MakeLibCall(GetFPLibCall(N->getValueType(0),
@ -278,19 +280,28 @@ SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
N->getOperand(1), LHS, RHS, N->getOperand(4));
}
SDValue DAGTypeLegalizer::SoftenFloatRes_SINT_TO_FP(SDNode *N) {
SDValue Op = N->getOperand(0);
SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
MVT SVT = N->getOperand(0).getValueType();
MVT RVT = N->getValueType(0);
RTLIB::Libcall LC = RTLIB::getSINTTOFP(Op.getValueType(), RVT);
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SINT_TO_FP!");
return MakeLibCall(LC, TLI.getTypeToTransformTo(RVT), &Op, 1, false);
}
MVT NVT = MVT();
SDValue DAGTypeLegalizer::SoftenFloatRes_UINT_TO_FP(SDNode *N) {
SDValue Op = N->getOperand(0);
MVT RVT = N->getValueType(0);
RTLIB::Libcall LC = RTLIB::getUINTTOFP(Op.getValueType(), RVT);
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported UINT_TO_FP!");
// If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
// a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
// match. Look for an appropriate libcall.
RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
NVT = (MVT::SimpleValueType)t;
// The source needs to big enough to hold the operand.
if (NVT.bitsGE(SVT))
LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
}
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
// Sign/zero extend the argument if the libcall takes a larger type.
SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
NVT, N->getOperand(0));
return MakeLibCall(LC, TLI.getTypeToTransformTo(RVT), &Op, 1, false);
}

3
lib/CodeGen/SelectionDAG/LegalizeTypes.h
View File

@ -360,8 +360,7 @@ private:
SDValue SoftenFloatRes_LOAD(SDNode *N);
SDValue SoftenFloatRes_SELECT(SDNode *N);
SDValue SoftenFloatRes_SELECT_CC(SDNode *N);
SDValue SoftenFloatRes_SINT_TO_FP(SDNode *N);
SDValue SoftenFloatRes_UINT_TO_FP(SDNode *N);
SDValue SoftenFloatRes_XINT_TO_FP(SDNode *N);
// Operand Float to Integer Conversion.
bool SoftenFloatOperand(SDNode *N, unsigned OpNo);

55
test/CodeGen/Mips/2008-11-10-xint_to_fp.ll Normal file
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@ -0,0 +1,55 @@
; RUN: llvm-as < %s | llc
; PR2667
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64"
target triple = "psp"
%struct._Bigint = type { %struct._Bigint*, i32, i32, i32, i32, [1 x i32] }
%struct.__FILE = type { i8*, i32, i32, i16, i16, %struct.__sbuf, i32, i8*, i32 (i8*, i8*, i32)*, i32 (i8*, i8*, i32)*, i32 (i8*, i32, i32)*, i32 (i8*)*, %struct.__sbuf, i8*, i32, [3 x i8], [1 x i8], %struct.__sbuf, i32, i32, %struct._reent*, i32 }
%struct.__sbuf = type { i8*, i32 }
%struct._atexit = type { %struct._atexit*, i32, [32 x void ()*], %struct._on_exit_args }
%struct._glue = type { %struct._glue*, i32, %struct.__FILE* }
%struct._on_exit_args = type { [32 x i8*], [32 x i8*], i32, i32 }
%struct._reent = type { i32, %struct.__FILE*, %struct.__FILE*, %struct.__FILE*, i32, [25 x i8], i32, i8*, i32, void (%struct._reent*)*, %struct._Bigint*, i32, %struct._Bigint*, %struct._Bigint**, i32, i8*, { { [30 x i8*], [30 x i32] } }, %struct._atexit*, %struct._atexit, void (i32)**, %struct._glue, [3 x %struct.__FILE] }
@_impure_ptr = external global %struct._reent* ; <%struct._reent**> [#uses=1]
define double @_erand48_r(%struct._reent* %r, i16* %xseed) nounwind {
entry:
tail call void @__dorand48( %struct._reent* %r, i16* %xseed ) nounwind
load i16* %xseed, align 2 ; <i16>:0 [#uses=1]
uitofp i16 %0 to double ; <double>:1 [#uses=1]
tail call double @ldexp( double %1, i32 -48 ) nounwind ; <double>:2 [#uses=1]
getelementptr i16* %xseed, i32 1 ; <i16*>:3 [#uses=1]
load i16* %3, align 2 ; <i16>:4 [#uses=1]
uitofp i16 %4 to double ; <double>:5 [#uses=1]
tail call double @ldexp( double %5, i32 -32 ) nounwind ; <double>:6 [#uses=1]
add double %2, %6 ; <double>:7 [#uses=1]
getelementptr i16* %xseed, i32 2 ; <i16*>:8 [#uses=1]
load i16* %8, align 2 ; <i16>:9 [#uses=1]
uitofp i16 %9 to double ; <double>:10 [#uses=1]
tail call double @ldexp( double %10, i32 -16 ) nounwind ; <double>:11 [#uses=1]
add double %7, %11 ; <double>:12 [#uses=1]
ret double %12
}
declare void @__dorand48(%struct._reent*, i16*)
declare double @ldexp(double, i32)
define double @erand48(i16* %xseed) nounwind {
entry:
load %struct._reent** @_impure_ptr, align 4 ; <%struct._reent*>:0 [#uses=1]
tail call void @__dorand48( %struct._reent* %0, i16* %xseed ) nounwind
load i16* %xseed, align 2 ; <i16>:1 [#uses=1]
uitofp i16 %1 to double ; <double>:2 [#uses=1]
tail call double @ldexp( double %2, i32 -48 ) nounwind ; <double>:3 [#uses=1]
getelementptr i16* %xseed, i32 1 ; <i16*>:4 [#uses=1]
load i16* %4, align 2 ; <i16>:5 [#uses=1]
uitofp i16 %5 to double ; <double>:6 [#uses=1]
tail call double @ldexp( double %6, i32 -32 ) nounwind ; <double>:7 [#uses=1]
add double %3, %7 ; <double>:8 [#uses=1]
getelementptr i16* %xseed, i32 2 ; <i16*>:9 [#uses=1]
load i16* %9, align 2 ; <i16>:10 [#uses=1]
uitofp i16 %10 to double ; <double>:11 [#uses=1]
tail call double @ldexp( double %11, i32 -16 ) nounwind ; <double>:12 [#uses=1]
add double %8, %12 ; <double>:13 [#uses=1]
ret double %13
}