Narrow right shifts need to encode their immediates differently from a normal

[oota-llvm.git] / lib / Target / ARM / ARMMCCodeEmitter.cpp

diff --git a/lib/Target/ARM/ARMMCCodeEmitter.cpp b/lib/Target/ARM/ARMMCCodeEmitter.cpp
index 6d7b48587d19570ef839d8d4eb7a1d6851815dd5..48884a1d7182dc77fe26619997f1a3bf1e813098 100644 (file)
--- a/lib/Target/ARM/ARMMCCodeEmitter.cpp
+++ b/lib/Target/ARM/ARMMCCodeEmitter.cpp
@@ -278,6 +278,13 @@ public:
   unsigned getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op,
                                      SmallVectorImpl<MCFixup> &Fixups) const;
 
+  unsigned getNarrowShiftRight16Imm(const MCInst &MI, unsigned Op,
+                                    SmallVectorImpl<MCFixup> &Fixups) const;
+  unsigned getNarrowShiftRight32Imm(const MCInst &MI, unsigned Op,
+                                    SmallVectorImpl<MCFixup> &Fixups) const;
+  unsigned getNarrowShiftRight64Imm(const MCInst &MI, unsigned Op,
+                                    SmallVectorImpl<MCFixup> &Fixups) const;
+
   unsigned NEONThumb2DataIPostEncoder(const MCInst &MI,
                                       unsigned EncodedValue) const;
   unsigned NEONThumb2LoadStorePostEncoder(const MCInst &MI,
@@ -1201,6 +1208,24 @@ getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op,
   return MO.getReg();
 }
 
+unsigned ARMMCCodeEmitter::
+getNarrowShiftRight16Imm(const MCInst &MI, unsigned Op,
+                         SmallVectorImpl<MCFixup> &Fixups) const {
+  return 8 - MI.getOperand(Op).getImm();
+}
+
+unsigned ARMMCCodeEmitter::
+getNarrowShiftRight32Imm(const MCInst &MI, unsigned Op,
+                         SmallVectorImpl<MCFixup> &Fixups) const {
+  return 16 - MI.getOperand(Op).getImm();
+}
+
+unsigned ARMMCCodeEmitter::
+getNarrowShiftRight64Imm(const MCInst &MI, unsigned Op,
+                         SmallVectorImpl<MCFixup> &Fixups) const {
+  return 32 - MI.getOperand(Op).getImm();
+}
+
 void ARMMCCodeEmitter::
 EncodeInstruction(const MCInst &MI, raw_ostream &OS,
                   SmallVectorImpl<MCFixup> &Fixups) const {