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optout
2009 Dec 09
2
[LLVMdev] Unsigned int multiplication using UMUL_LOHI
...ports.
bool HasSMUL_LOHI = TLI.isOperationLegalOrCustom(ISD::SMUL_LOHI, VT);
bool HasUMUL_LOHI = TLI.isOperationLegalOrCustom(ISD::UMUL_LOHI, VT);
bool HasMULHS = TLI.isOperationLegalOrCustom(ISD::MULHS, VT);
bool HasMULHU = TLI.isOperationLegalOrCustom(ISD::MULHU, VT);
unsigned OpToUse = 0;
if (HasSMUL_LOHI && !HasMULHS) {
OpToUse = ISD::SMUL_LOHI;
} else if (HasUMUL_LOHI && !HasMULHU) {
OpToUse = ISD::UMUL_LOHI;
} else if (HasSMUL_LOHI) {
OpToUse = ISD::SMUL_LOHI;
} else if (HasUMUL_LOHI) {
OpToUse = ISD::UMUL_LOHI;
}...