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author | Tom Stellard <thomas.stellard@amd.com> | 2014-03-21 15:51:54 +0000 |
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committer | Tom Stellard <thomas.stellard@amd.com> | 2014-03-21 15:51:54 +0000 |
commit | 1f1c0495d05fae15e71f62ac380e873460770d82 (patch) | |
tree | 48e0a5704ef8af0622f847641a87e92360b929ee /lib/Target/R600/SIInstrInfo.cpp | |
parent | af4c7da3064af741c27d528ba36a9cdbebd4a58a (diff) | |
download | llvm-1f1c0495d05fae15e71f62ac380e873460770d82.tar.gz llvm-1f1c0495d05fae15e71f62ac380e873460770d82.tar.bz2 llvm-1f1c0495d05fae15e71f62ac380e873460770d82.tar.xz |
R600/SI: Handle S_MOV_B64 in SIInstrInfo::moveToVALU()
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204475 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/R600/SIInstrInfo.cpp')
-rw-r--r-- | lib/Target/R600/SIInstrInfo.cpp | 52 |
1 files changed, 50 insertions, 2 deletions
diff --git a/lib/Target/R600/SIInstrInfo.cpp b/lib/Target/R600/SIInstrInfo.cpp index 3ed8dfa325..c8a52971ef 100644 --- a/lib/Target/R600/SIInstrInfo.cpp +++ b/lib/Target/R600/SIInstrInfo.cpp @@ -496,6 +496,9 @@ unsigned SIInstrInfo::getVALUOp(const MachineInstr &MI) { case AMDGPU::REG_SEQUENCE: return AMDGPU::REG_SEQUENCE; case AMDGPU::COPY: return AMDGPU::COPY; case AMDGPU::PHI: return AMDGPU::PHI; + case AMDGPU::S_MOV_B32: + return MI.getOperand(1).isReg() ? + TargetOpcode::COPY : AMDGPU::V_MOV_B32_e32; case AMDGPU::S_ADD_I32: return AMDGPU::V_ADD_I32_e32; case AMDGPU::S_ADDC_U32: return AMDGPU::V_ADDC_U32_e32; case AMDGPU::S_SUB_I32: return AMDGPU::V_SUB_I32_e32; @@ -680,12 +683,57 @@ void SIInstrInfo::moveToVALU(MachineInstr &TopInst) const { while (!Worklist.empty()) { MachineInstr *Inst = Worklist.pop_back_val(); + MachineBasicBlock *MBB = Inst->getParent(); + MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo(); + + // Handle some special cases + switch(Inst->getOpcode()) { + case AMDGPU::S_MOV_B64: { + DebugLoc DL = Inst->getDebugLoc(); + + // If the source operand is a register we can replace this with a + // copy + if (Inst->getOperand(1).isReg()) { + MachineInstr *Copy = BuildMI(*MBB, Inst, DL, + get(TargetOpcode::COPY)) + .addOperand(Inst->getOperand(0)) + .addOperand(Inst->getOperand(1)); + Worklist.push_back(Copy); + } else { + // Otherwise, we need to split this into two movs, because there is + // no 64-bit VALU move instruction. + unsigned LoDst, HiDst, Dst; + LoDst = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass); + HiDst = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass); + Dst = MRI.createVirtualRegister( + MRI.getRegClass(Inst->getOperand(0).getReg())); + + MachineInstr *Lo = BuildMI(*MBB, Inst, DL, get(AMDGPU::S_MOV_B32), + LoDst) + .addImm(Inst->getOperand(1).getImm() & 0xFFFFFFFF); + MachineInstr *Hi = BuildMI(*MBB, Inst, DL, get(AMDGPU::S_MOV_B32), + HiDst) + .addImm(Inst->getOperand(1).getImm() >> 32); + + BuildMI(*MBB, Inst, DL, get(TargetOpcode::REG_SEQUENCE), Dst) + .addReg(LoDst) + .addImm(AMDGPU::sub0) + .addReg(HiDst) + .addImm(AMDGPU::sub1); + + MRI.replaceRegWith(Inst->getOperand(0).getReg(), Dst); + Worklist.push_back(Lo); + Worklist.push_back(Hi); + } + Inst->eraseFromParent(); + continue; + } + } + unsigned NewOpcode = getVALUOp(*Inst); if (NewOpcode == AMDGPU::INSTRUCTION_LIST_END) continue; - MachineRegisterInfo &MRI = Inst->getParent()->getParent()->getRegInfo(); - // Use the new VALU Opcode. const MCInstrDesc &NewDesc = get(NewOpcode); Inst->setDesc(NewDesc); |