diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c | 4 | ||||
| -rw-r--r-- | llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h | 3 |
2 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c index 9a628f2163d..a7becdb2c70 100644 --- a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c +++ b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c @@ -136,6 +136,10 @@ static InstrUID decode(OpcodeType type, if (modFromModRM(modRM) == 0x3) return modRMTable[dec->instructionIDs+1]; return modRMTable[dec->instructionIDs]; + case MODRM_SPLITREG: + if (modFromModRM(modRM) == 0x3) + return modRMTable[dec->instructionIDs+((modRM & 0x38) >> 3)+8]; + return modRMTable[dec->instructionIDs+((modRM & 0x38) >> 3)]; case MODRM_FULL: return modRMTable[dec->instructionIDs+modRM]; } diff --git a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h index a7ef0cc4325..d6b23c0af4f 100644 --- a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h +++ b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h @@ -156,6 +156,8 @@ typedef uint16_t InstrUID; * MODRM_SPLITRM - If the ModR/M byte is between 0x00 and 0xbf, the opcode * corresponds to one instruction; otherwise, it corresponds to * a different instruction. + * MODRM_SPLITREG - ModR/M byte divided by 8 is used to select instruction. This + corresponds to instructions that use reg field as opcode * MODRM_FULL - Potentially, each value of the ModR/M byte could correspond * to a different instruction. */ @@ -163,6 +165,7 @@ typedef uint16_t InstrUID; #define MODRMTYPES \ ENUM_ENTRY(MODRM_ONEENTRY) \ ENUM_ENTRY(MODRM_SPLITRM) \ + ENUM_ENTRY(MODRM_SPLITREG) \ ENUM_ENTRY(MODRM_FULL) #define ENUM_ENTRY(n) n, |
