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[mips][microMIPS] Implement disassembler support for 16-bit instructions LI16, ADDIUR1SP, ADDIUR2 and ADDIUS5

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Differential Revision: http://reviews.llvm.org/D6419


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222887 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jozef Kolek
2014-11-27 14:41:44 +00:00
parent 72ba1af89c
commit 2b8e58cc82
4 changed files with 105 additions and 3 deletions
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60
lib/Target/Mips/Disassembler/MipsDisassembler.cpp
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@@ -287,6 +287,26 @@ static DecodeStatus DecodeSpecial3LlSc(MCInst &Inst,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeAddiur2Simm7(MCInst &Inst,
unsigned Value,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeUImm6Lsl2(MCInst &Inst,
unsigned Value,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeLiSimm7(MCInst &Inst,
unsigned Value,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeSimm4(MCInst &Inst,
unsigned Value,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeSimm16(MCInst &Inst,
unsigned Insn,
uint64_t Address,
@@ -1458,6 +1478,46 @@ static DecodeStatus DecodeJumpTargetMM(MCInst &Inst,
return MCDisassembler::Success;
}
static DecodeStatus DecodeAddiur2Simm7(MCInst &Inst,
unsigned Value,
uint64_t Address,
const void *Decoder) {
if (Value == 0)
Inst.addOperand(MCOperand::CreateImm(1));
else if (Value == 0x7)
Inst.addOperand(MCOperand::CreateImm(-1));
else
Inst.addOperand(MCOperand::CreateImm(Value << 2));
return MCDisassembler::Success;
}
static DecodeStatus DecodeUImm6Lsl2(MCInst &Inst,
unsigned Value,
uint64_t Address,
const void *Decoder) {
Inst.addOperand(MCOperand::CreateImm(Value << 2));
return MCDisassembler::Success;
}
static DecodeStatus DecodeLiSimm7(MCInst &Inst,
unsigned Value,
uint64_t Address,
const void *Decoder) {
if (Value == 0x7F)
Inst.addOperand(MCOperand::CreateImm(-1));
else
Inst.addOperand(MCOperand::CreateImm(Value));
return MCDisassembler::Success;
}
static DecodeStatus DecodeSimm4(MCInst &Inst,
unsigned Value,
uint64_t Address,
const void *Decoder) {
Inst.addOperand(MCOperand::CreateImm(SignExtend32<4>(Value)));
return MCDisassembler::Success;
}
static DecodeStatus DecodeSimm16(MCInst &Inst,
unsigned Insn,
uint64_t Address,