Op1 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op1);
// Since SSE has no unsigned integer comparisons, we need to flip the sign
- // bits of the inputs before performing those operations.
+ // bits of the inputs before performing those operations. The lower
+ // compare is always unsigned.
+ SDValue SB;
if (FlipSigns) {
- SDValue SB = DAG.getConstant(0x80000000U, MVT::v4i32);
- Op0 = DAG.getNode(ISD::XOR, dl, MVT::v4i32, Op0, SB);
- Op1 = DAG.getNode(ISD::XOR, dl, MVT::v4i32, Op1, SB);
+ SB = DAG.getConstant(0x80000000U, MVT::v4i32);
+ } else {
+ SDValue Sign = DAG.getConstant(0x80000000U, MVT::i32);
+ SDValue Zero = DAG.getConstant(0x00000000U, MVT::i32);
+ SB = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
+ Sign, Zero, Sign, Zero);
}
+ Op0 = DAG.getNode(ISD::XOR, dl, MVT::v4i32, Op0, SB);
+ Op1 = DAG.getNode(ISD::XOR, dl, MVT::v4i32, Op1, SB);
// Emulate PCMPGTQ with (hi1 > hi2) | ((hi1 == hi2) & (lo1 > lo2))
SDValue GT = DAG.getNode(X86ISD::PCMPGT, dl, MVT::v4i32, Op0, Op1);