[mips][microMIPS] Implement BEQZ16 and BNEZ16 instructions

[oota-llvm.git] / lib / Target / Mips / MCTargetDesc / MipsMCCodeEmitter.cpp

diff --git a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
index 223a95a698a72eb585e5d5455a5f4620d28044f6..0dc444c0f1c82dc360bc5ea96244d2b9f63e08de 100644 (file)
--- a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
+++ b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
@@ -220,6 +220,28 @@ getBranchTargetOpValue(const MCInst &MI, unsigned OpNo,
   return 0;
 }
 
+/// getBranchTarget7OpValueMM - Return binary encoding of the microMIPS branch
+/// target operand. If the machine operand requires relocation,
+/// record the relocation and return zero.
+unsigned MipsMCCodeEmitter::
+getBranchTarget7OpValueMM(const MCInst &MI, unsigned OpNo,
+                          SmallVectorImpl<MCFixup> &Fixups,
+                          const MCSubtargetInfo &STI) const {
+
+  const MCOperand &MO = MI.getOperand(OpNo);
+
+  // If the destination is an immediate, divide by 2.
+  if (MO.isImm()) return MO.getImm() >> 1;
+
+  assert(MO.isExpr() &&
+         "getBranchTargetOpValueMM expects only expressions or immediates");
+
+  const MCExpr *Expr = MO.getExpr();
+  Fixups.push_back(MCFixup::Create(0, Expr,
+                                   MCFixupKind(Mips::fixup_MICROMIPS_PC7_S1)));
+  return 0;
+}
+
 /// getBranchTargetOpValue - Return binary encoding of the microMIPS branch
 /// target operand. If the machine operand requires relocation,
 /// record the relocation and return zero.