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llvm/lib/Target/AMDGPU/SIISelLowering.cpp

Lines changed: 49 additions & 49 deletions
Original file line numberDiff line numberDiff line change
@@ -5351,55 +5351,55 @@ static MachineBasicBlock *lowerWaveReduce(MachineInstr &MI,
53515351
BuildMI(BB, MI, DL, TII->get(BitCountOpc), NumActiveLanes)
53525352
.addReg(ExecMask);
53535353

5354-
switch (Opc) {
5355-
case AMDGPU::S_XOR_B32:
5356-
case AMDGPU::S_XOR_B64: {
5357-
// Performing an XOR operation on a uniform value
5358-
// depends on the parity of the number of active lanes.
5359-
// For even parity, the result will be 0, for odd
5360-
// parity the result will be the same as the input value.
5361-
Register ParityRegister =
5362-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5363-
5364-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_AND_B32), ParityRegister)
5365-
.addReg(NewAccumulator->getOperand(0).getReg())
5366-
.addImm(1)
5367-
.setOperandDead(3); // Dead scc
5368-
if (is32BitOpc) {
5369-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DstReg)
5370-
.addReg(SrcReg)
5371-
.addReg(ParityRegister);
5372-
} else {
5373-
Register DestSub0 =
5374-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5375-
Register DestSub1 =
5376-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5377-
5378-
const TargetRegisterClass *SrcRC = MRI.getRegClass(SrcReg);
5379-
const TargetRegisterClass *SrcSubRC =
5380-
TRI->getSubRegisterClass(SrcRC, AMDGPU::sub0);
5381-
5382-
MachineOperand Op1L = TII->buildExtractSubRegOrImm(
5383-
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub0, SrcSubRC);
5384-
MachineOperand Op1H = TII->buildExtractSubRegOrImm(
5385-
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub1, SrcSubRC);
5386-
5387-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub0)
5388-
.add(Op1L)
5389-
.addReg(ParityRegister);
5390-
5391-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub1)
5392-
.add(Op1H)
5393-
.addReg(ParityRegister);
5394-
5395-
BuildMI(BB, MI, DL, TII->get(TargetOpcode::REG_SEQUENCE), DstReg)
5396-
.addReg(DestSub0)
5397-
.addImm(AMDGPU::sub0)
5398-
.addReg(DestSub1)
5399-
.addImm(AMDGPU::sub1);
5400-
}
5401-
break;
5402-
}
5354+
switch (Opc) {
5355+
case AMDGPU::S_XOR_B32:
5356+
case AMDGPU::S_XOR_B64: {
5357+
// Performing an XOR operation on a uniform value
5358+
// depends on the parity of the number of active lanes.
5359+
// For even parity, the result will be 0, for odd
5360+
// parity the result will be the same as the input value.
5361+
Register ParityRegister =
5362+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5363+
5364+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_AND_B32), ParityRegister)
5365+
.addReg(NewAccumulator->getOperand(0).getReg())
5366+
.addImm(1)
5367+
.setOperandDead(3); // Dead scc
5368+
if (is32BitOpc) {
5369+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DstReg)
5370+
.addReg(SrcReg)
5371+
.addReg(ParityRegister);
5372+
} else {
5373+
Register DestSub0 =
5374+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5375+
Register DestSub1 =
5376+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5377+
5378+
const TargetRegisterClass *SrcRC = MRI.getRegClass(SrcReg);
5379+
const TargetRegisterClass *SrcSubRC =
5380+
TRI->getSubRegisterClass(SrcRC, AMDGPU::sub0);
5381+
5382+
MachineOperand Op1L = TII->buildExtractSubRegOrImm(
5383+
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub0, SrcSubRC);
5384+
MachineOperand Op1H = TII->buildExtractSubRegOrImm(
5385+
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub1, SrcSubRC);
5386+
5387+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub0)
5388+
.add(Op1L)
5389+
.addReg(ParityRegister);
5390+
5391+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub1)
5392+
.add(Op1H)
5393+
.addReg(ParityRegister);
5394+
5395+
BuildMI(BB, MI, DL, TII->get(TargetOpcode::REG_SEQUENCE), DstReg)
5396+
.addReg(DestSub0)
5397+
.addImm(AMDGPU::sub0)
5398+
.addReg(DestSub1)
5399+
.addImm(AMDGPU::sub1);
5400+
}
5401+
break;
5402+
}
54035403
case AMDGPU::S_SUB_I32: {
54045404
Register NegatedVal = MRI.createVirtualRegister(DstRegClass);
54055405

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