[mips][mips64r6] Add compact branch instructions

[oota-llvm.git] / lib / Target / Mips / Disassembler / MipsDisassembler.cpp

diff --git a/lib/Target/Mips/Disassembler/MipsDisassembler.cpp b/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
index 958712602b4b89a11e3076e3b2db20808aeb095d..21abe6c5857dcbd203993b3f3ebc61271e24fc1f 100644 (file)
--- a/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
+++ b/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
@@ -205,6 +205,16 @@ static DecodeStatus DecodeJumpTarget(MCInst &Inst,
                                      uint64_t Address,
                                      const void *Decoder);
 
+static DecodeStatus DecodeBranchTarget21(MCInst &Inst,
+                                         unsigned Offset,
+                                         uint64_t Address,
+                                         const void *Decoder);
+
+static DecodeStatus DecodeBranchTarget26(MCInst &Inst,
+                                         unsigned Offset,
+                                         uint64_t Address,
+                                         const void *Decoder);
+
 // DecodeBranchTargetMM - Decode microMIPS branch offset, which is
 // shifted left by 1 bit.
 static DecodeStatus DecodeBranchTargetMM(MCInst &Inst,
@@ -856,6 +866,26 @@ static DecodeStatus DecodeJumpTarget(MCInst &Inst,
   return MCDisassembler::Success;
 }
 
+static DecodeStatus DecodeBranchTarget21(MCInst &Inst,
+                                         unsigned Offset,
+                                         uint64_t Address,
+                                         const void *Decoder) {
+  int32_t BranchOffset = SignExtend32<21>(Offset) << 2;
+
+  Inst.addOperand(MCOperand::CreateImm(BranchOffset));
+  return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeBranchTarget26(MCInst &Inst,
+                                         unsigned Offset,
+                                         uint64_t Address,
+                                         const void *Decoder) {
+  int32_t BranchOffset = SignExtend32<26>(Offset) << 2;
+
+  Inst.addOperand(MCOperand::CreateImm(BranchOffset));
+  return MCDisassembler::Success;
+}
+
 static DecodeStatus DecodeBranchTargetMM(MCInst &Inst,
                                          unsigned Offset,
                                          uint64_t Address,