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Thumb2 assembly parsing and encoding for LDREX/LDREXB/LDREXD/LDREXH.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139381 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2011-09-09 18:37:27 +00:00
parent 1ab7c8ea03
commit b6aed508e3
10 changed files with 143 additions and 40 deletions
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17
lib/Target/ARM/Disassembler/ARMDisassembler.cpp
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@ -269,6 +269,8 @@ static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
@ -2669,6 +2671,21 @@ static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
return S;
}
static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
unsigned Rn = fieldFromInstruction32(Val, 8, 4);
unsigned imm = fieldFromInstruction32(Val, 0, 8);
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
Inst.addOperand(MCOperand::CreateImm(imm));
return S;
}
static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
int imm = Val & 0xFF;