maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

The assertion was wrong: the code only worked for i64. While we're at it, 

expand the code to work for all integer datatypes.  This should unbreak
alpha.

llvm-svn: 22464
This commit is contained in:
Chris Lattner 2005-07-18 04:31:14 +00:00
parent 012d35ae17
commit b35912e421
1 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -158,8 +158,6 @@ SelectionDAGLegalize::SelectionDAGLegalize(SelectionDAG &dag)
/// legal for the target.
SDOperand SelectionDAGLegalize::ExpandLegalUINT_TO_FP(SDOperand Op0,
MVT::ValueType DestVT) {
assert(Op0.getValueType() == MVT::i32 &&
"This code only works for i32 input: extend in the future");
SDOperand Tmp1 = DAG.getNode(ISD::SINT_TO_FP, DestVT, Op0);
SDOperand SignSet = DAG.getSetCC(ISD::SETLT, TLI.getSetCCResultTy(),
@ -170,7 +168,17 @@ SDOperand SelectionDAGLegalize::ExpandLegalUINT_TO_FP(SDOperand Op0,
SDOperand CstOffset = DAG.getNode(ISD::SELECT, Zero.getValueType(),
SignSet, Four, Zero);
uint64_t FF = 0x5f800000ULL;
// If the sign bit of the integer is set, the large number will be treated as
// a negative number. To counteract this, the dynamic code adds an offset
// depending on the data type.
uint64_t FF;
switch (Op0.getValueType()) {
default: assert(0 && "Unsupported integer type!");
case MVT::i8 : FF = 0x43800000ULL; break; // 2^8 (as a float)
case MVT::i16: FF = 0x47800000ULL; break; // 2^16 (as a float)
case MVT::i32: FF = 0x4F800000ULL; break; // 2^32 (as a float)
case MVT::i64: FF = 0x5F800000ULL; break; // 2^64 (as a float)
}
if (TLI.isLittleEndian()) FF <<= 32;
static Constant *FudgeFactor = ConstantUInt::get(Type::ULongTy, FF);