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[mips][msa] Fix immediate value of LSA instruction as it was being wrongly encoded.

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The immediate field should be encoded as "imm - 1" as the CPU always adds one to that field.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195004 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matheus Almeida
2013-11-18 12:32:49 +00:00
parent f56f1dfecc
commit 95adf91f29
6 changed files with 118 additions and 7 deletions
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16
lib/Target/Mips/Disassembler/MipsDisassembler.cpp
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@ -246,6 +246,13 @@ static DecodeStatus DecodeSimm16(MCInst &Inst,
uint64_t Address,
const void *Decoder);
// Decode the immediate field of an LSA instruction which
// is off by one.
static DecodeStatus DecodeLSAImm(MCInst &Inst,
unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeInsSize(MCInst &Inst,
unsigned Insn,
uint64_t Address,
@ -785,6 +792,15 @@ static DecodeStatus DecodeSimm16(MCInst &Inst,
return MCDisassembler::Success;
}
static DecodeStatus DecodeLSAImm(MCInst &Inst,
unsigned Insn,
uint64_t Address,
const void *Decoder) {
// We add one to the immediate field as it was encoded as 'imm - 1'.
Inst.addOperand(MCOperand::CreateImm(Insn + 1));
return MCDisassembler::Success;
}
static DecodeStatus DecodeInsSize(MCInst &Inst,
unsigned Insn,
uint64_t Address,