diff options
| author | Craig Topper <craig.topper@gmail.com> | 2012-09-13 05:45:42 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2012-09-13 05:45:42 +0000 |
| commit | 76b29b518dad5e719077a1066e242fa91f777a7c (patch) | |
| tree | 4d4219f3a5859b42b605958219d94dfd631f3e5f /lib/Target/X86/Disassembler/X86DisassemblerDecoder.c | |
| parent | 7639f98c5fc903339bf50e574aee999d54340cdf (diff) | |
Add a new compression type to ModRM table that detects when the memory modRM byte represent 8 instructions and the reg modRM byte represents up to 64 instructions. Reduces modRM table from 43k entreis to 25k entries. Based on a patch from Manman Ren.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163774 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/Disassembler/X86DisassemblerDecoder.c')
| -rw-r--r-- | lib/Target/X86/Disassembler/X86DisassemblerDecoder.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c b/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c index af444d196e..b24f517209 100644 --- a/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c +++ b/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c @@ -138,6 +138,10 @@ static InstrUID decode(OpcodeType type, if (modFromModRM(modRM) == 0x3) return modRMTable[dec->instructionIDs+((modRM & 0x38) >> 3)+8]; return modRMTable[dec->instructionIDs+((modRM & 0x38) >> 3)]; + case MODRM_SPLITMISC: + if (modFromModRM(modRM) == 0x3) + return modRMTable[dec->instructionIDs+(modRM & 0x3f)+8]; + return modRMTable[dec->instructionIDs+((modRM & 0x38) >> 3)]; case MODRM_FULL: return modRMTable[dec->instructionIDs+modRM]; } |