diff options
Diffstat (limited to 'llvm/lib/Target/AVR/AVRISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/AVR/AVRISelLowering.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/llvm/lib/Target/AVR/AVRISelLowering.cpp b/llvm/lib/Target/AVR/AVRISelLowering.cpp index f3e74e843695..f7f560ff5db3 100644 --- a/llvm/lib/Target/AVR/AVRISelLowering.cpp +++ b/llvm/lib/Target/AVR/AVRISelLowering.cpp @@ -392,16 +392,22 @@ SDValue AVRTargetLowering::LowerShifts(SDValue Op, SelectionDAG &DAG) const { Victim = DAG.getNode(AVRISD::LSLWN, dl, VT, Victim, DAG.getConstant(8, dl, VT)); ShiftAmount -= 8; + // Only operate on the higher byte for remaining shift bits. + Opc8 = AVRISD::LSLHI; break; case ISD::SRL: Victim = DAG.getNode(AVRISD::LSRWN, dl, VT, Victim, DAG.getConstant(8, dl, VT)); ShiftAmount -= 8; + // Only operate on the lower byte for remaining shift bits. + Opc8 = AVRISD::LSRLO; break; case ISD::SRA: Victim = DAG.getNode(AVRISD::ASRWN, dl, VT, Victim, DAG.getConstant(8, dl, VT)); ShiftAmount -= 8; + // Only operate on the lower byte for remaining shift bits. + Opc8 = AVRISD::ASRLO; break; default: break; @@ -412,11 +418,22 @@ SDValue AVRTargetLowering::LowerShifts(SDValue Op, SelectionDAG &DAG) const { Victim = DAG.getNode(AVRISD::LSLWN, dl, VT, Victim, DAG.getConstant(12, dl, VT)); ShiftAmount -= 12; + // Only operate on the higher byte for remaining shift bits. + Opc8 = AVRISD::LSLHI; break; case ISD::SRL: Victim = DAG.getNode(AVRISD::LSRWN, dl, VT, Victim, DAG.getConstant(12, dl, VT)); ShiftAmount -= 12; + // Only operate on the lower byte for remaining shift bits. + Opc8 = AVRISD::LSRLO; + break; + case ISD::SRA: + Victim = DAG.getNode(AVRISD::ASRWN, dl, VT, Victim, + DAG.getConstant(8, dl, VT)); + ShiftAmount -= 8; + // Only operate on the lower byte for remaining shift bits. + Opc8 = AVRISD::ASRLO; break; default: break; |