[mips][microMIPS] Implement LB, LBE, LBU and LBUE instructions
Differential Revision: http://reviews.llvm.org/D11633
llvm-svn: 250511
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
index 1d06860..bd6afcb 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
@@ -773,7 +773,7 @@
return OffBits & 0x7F;
}
- unsigned MipsMCCodeEmitter::
+unsigned MipsMCCodeEmitter::
getMemEncodingMMImm9(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {
@@ -810,6 +810,19 @@
}
unsigned MipsMCCodeEmitter::
+getMemEncodingMMImm16(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+ // Base register is encoded in bits 20-16, offset is encoded in bits 15-0.
+ assert(MI.getOperand(OpNo).isReg());
+ unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo), Fixups,
+ STI) << 16;
+ unsigned OffBits = getMachineOpValue(MI, MI.getOperand(OpNo+1), Fixups, STI);
+
+ return (OffBits & 0xFFFF) | RegBits;
+}
+
+unsigned MipsMCCodeEmitter::
getMemEncodingMMImm4sp(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {