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llvm/lib/Target/AMDGPU/SIISelLowering.cpp

Lines changed: 49 additions & 49 deletions
Original file line numberDiff line numberDiff line change
@@ -5299,55 +5299,55 @@ static MachineBasicBlock *lowerWaveReduce(MachineInstr &MI,
52995299
BuildMI(BB, MI, DL, TII->get(BitCountOpc), NumActiveLanes)
53005300
.addReg(ExecMask);
53015301

5302-
switch (Opc) {
5303-
case AMDGPU::S_XOR_B32:
5304-
case AMDGPU::S_XOR_B64: {
5305-
// Performing an XOR operation on a uniform value
5306-
// depends on the parity of the number of active lanes.
5307-
// For even parity, the result will be 0, for odd
5308-
// parity the result will be the same as the input value.
5309-
Register ParityRegister =
5310-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5311-
5312-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_AND_B32), ParityRegister)
5313-
.addReg(NewAccumulator->getOperand(0).getReg())
5314-
.addImm(1)
5315-
.setOperandDead(3); // Dead scc
5316-
if (is32BitOpc) {
5317-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DstReg)
5318-
.addReg(SrcReg)
5319-
.addReg(ParityRegister);
5320-
} else {
5321-
Register DestSub0 =
5322-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5323-
Register DestSub1 =
5324-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5325-
5326-
const TargetRegisterClass *SrcRC = MRI.getRegClass(SrcReg);
5327-
const TargetRegisterClass *SrcSubRC =
5328-
TRI->getSubRegisterClass(SrcRC, AMDGPU::sub0);
5329-
5330-
MachineOperand Op1L = TII->buildExtractSubRegOrImm(
5331-
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub0, SrcSubRC);
5332-
MachineOperand Op1H = TII->buildExtractSubRegOrImm(
5333-
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub1, SrcSubRC);
5334-
5335-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub0)
5336-
.add(Op1L)
5337-
.addReg(ParityRegister);
5338-
5339-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub1)
5340-
.add(Op1H)
5341-
.addReg(ParityRegister);
5342-
5343-
BuildMI(BB, MI, DL, TII->get(TargetOpcode::REG_SEQUENCE), DstReg)
5344-
.addReg(DestSub0)
5345-
.addImm(AMDGPU::sub0)
5346-
.addReg(DestSub1)
5347-
.addImm(AMDGPU::sub1);
5348-
}
5349-
break;
5350-
}
5302+
switch (Opc) {
5303+
case AMDGPU::S_XOR_B32:
5304+
case AMDGPU::S_XOR_B64: {
5305+
// Performing an XOR operation on a uniform value
5306+
// depends on the parity of the number of active lanes.
5307+
// For even parity, the result will be 0, for odd
5308+
// parity the result will be the same as the input value.
5309+
Register ParityRegister =
5310+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5311+
5312+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_AND_B32), ParityRegister)
5313+
.addReg(NewAccumulator->getOperand(0).getReg())
5314+
.addImm(1)
5315+
.setOperandDead(3); // Dead scc
5316+
if (is32BitOpc) {
5317+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DstReg)
5318+
.addReg(SrcReg)
5319+
.addReg(ParityRegister);
5320+
} else {
5321+
Register DestSub0 =
5322+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5323+
Register DestSub1 =
5324+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5325+
5326+
const TargetRegisterClass *SrcRC = MRI.getRegClass(SrcReg);
5327+
const TargetRegisterClass *SrcSubRC =
5328+
TRI->getSubRegisterClass(SrcRC, AMDGPU::sub0);
5329+
5330+
MachineOperand Op1L = TII->buildExtractSubRegOrImm(
5331+
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub0, SrcSubRC);
5332+
MachineOperand Op1H = TII->buildExtractSubRegOrImm(
5333+
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub1, SrcSubRC);
5334+
5335+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub0)
5336+
.add(Op1L)
5337+
.addReg(ParityRegister);
5338+
5339+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub1)
5340+
.add(Op1H)
5341+
.addReg(ParityRegister);
5342+
5343+
BuildMI(BB, MI, DL, TII->get(TargetOpcode::REG_SEQUENCE), DstReg)
5344+
.addReg(DestSub0)
5345+
.addImm(AMDGPU::sub0)
5346+
.addReg(DestSub1)
5347+
.addImm(AMDGPU::sub1);
5348+
}
5349+
break;
5350+
}
53515351
case AMDGPU::S_SUB_I32: {
53525352
Register NegatedVal = MRI.createVirtualRegister(DstRegClass);
53535353

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