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don't violate C TBAA rules, use FloatToBits instead.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45076 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-12-16 20:41:33 +00:00
parent 48b0133b83
commit 10d724af26
1 changed files with 10 additions and 22 deletions
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32
lib/Target/CellSPU/SPUOperands.td
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@ -153,33 +153,25 @@ def hi16 : PatLeaf<(imm), [{
// Transform a float, returning the high 16 bits shifted down, as if
// the float was really an unsigned integer:
def HI16_f32 : SDNodeXForm<fpimm, [{
const APFloat &apf = N->getValueAPF();
float fval = apf.convertToFloat();
unsigned val = *((unsigned *) &fval);
return getI32Imm(val >> 16);
float fval = N->getValueAPF().convertToFloat();
return getI32Imm(FloatToBits(fval) >> 16);
}]>;
// Transformation function on floats: get the low 16 bits as if the float was
// an unsigned integer.
def LO16_f32 : SDNodeXForm<fpimm, [{
const APFloat &apf = N->getValueAPF();
float fval = apf.convertToFloat();
unsigned val = *((unsigned *) &fval);
return getI32Imm(val & 0xffff);
float fval = N->getValueAPF().convertToFloat();
return getI32Imm(FloatToBits(fval) & 0xffff);
}]>;
def FPimm_sext16 : SDNodeXForm<fpimm, [{
const APFloat &apf = N->getValueAPF();
float fval = apf.convertToFloat();
unsigned val = *((unsigned *) &fval);
return getI32Imm((int) ((val << 16) >> 16));
float fval = N->getValueAPF().convertToFloat();
return getI32Imm((int) ((FloatToBits(fval) << 16) >> 16));
}]>;
def FPimm_u18 : SDNodeXForm<fpimm, [{
const APFloat &apf = N->getValueAPF();
float fval = apf.convertToFloat();
unsigned val = *((unsigned *) &fval);
return getI32Imm(val & ((1 << 19) - 1));
float fval = N->getValueAPF().convertToFloat();
return getI32Imm(FloatToBits(fval) & ((1 << 19) - 1));
}]>;
def fpimmSExt16 : PatLeaf<(fpimm), [{
@ -190,9 +182,7 @@ def fpimmSExt16 : PatLeaf<(fpimm), [{
// Does the SFP constant only have upp 16 bits set?
def hi16_f32 : PatLeaf<(fpimm), [{
if (N->getValueType(0) == MVT::f32) {
const APFloat &apf = N->getValueAPF();
float fval = apf.convertToFloat();
uint32_t val = *((unsigned *) &fval);
uint32_t val = FloatToBits(N->getValueAPF().convertToFloat());
return ((val & 0xffff0000) == val);
}
@ -202,9 +192,7 @@ def hi16_f32 : PatLeaf<(fpimm), [{
// Does the SFP constant fit into 18 bits?
def fpimm18 : PatLeaf<(fpimm), [{
if (N->getValueType(0) == MVT::f32) {
const APFloat &apf = N->getValueAPF();
float fval = apf.convertToFloat();
uint32_t Value = *((uint32_t *) &fval);
uint32_t Value = FloatToBits(N->getValueAPF().convertToFloat());
return ((Value & ((1 << 19) - 1)) == Value);
}