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R600/SI: Use bcnt instruction for ctpop

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210567 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault
2014-06-10 19:18:21 +00:00
parent 81ff9cdedb
commit ee9772d9dd
7 changed files with 230 additions and 11 deletions
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5
lib/Target/R600/SIInstrInfo.cpp
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@@ -668,6 +668,7 @@ unsigned SIInstrInfo::getVALUOp(const MachineInstr &MI) {
case AMDGPU::S_LOAD_DWORDX2_SGPR: return AMDGPU::BUFFER_LOAD_DWORDX2_ADDR64;
case AMDGPU::S_LOAD_DWORDX4_IMM:
case AMDGPU::S_LOAD_DWORDX4_SGPR: return AMDGPU::BUFFER_LOAD_DWORDX4_ADDR64;
case AMDGPU::S_BCNT1_I32_B32: return AMDGPU::V_BCNT_U32_B32_e32;
}
}
@@ -1218,6 +1219,10 @@ void SIInstrInfo::moveToVALU(MachineInstr &TopInst) const {
// 3 to not hit an assertion later in MCInstLower.
Inst->addOperand(MachineOperand::CreateImm(0));
Inst->addOperand(MachineOperand::CreateImm(0));
} else if (Opcode == AMDGPU::S_BCNT1_I32_B32) {
// The VALU version adds the second operand to the result, so insert an
// extra 0 operand.
Inst->addOperand(MachineOperand::CreateImm(0));
}
addDescImplicitUseDef(NewDesc, Inst);