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| author | Gabe Black <gblack@eecs.umich.edu> | 2009-08-18 00:52:45 -0700 |
|---|---|---|
| committer | Gabe Black <gblack@eecs.umich.edu> | 2009-08-18 00:52:45 -0700 |
| commit | fd45c04cad4891c6216807639482f2b2d6a7b042 (patch) | |
| tree | 63dd180fab8258317559fbff99f46f456c5a765a /src/arch/x86/predecoder.cc | |
| parent | a1ea10d7bac34f022598f82873723e2dfee58625 (diff) | |
| download | gem5-fd45c04cad4891c6216807639482f2b2d6a7b042.tar.xz | |
X86: Decode three byte opcodes.
Diffstat (limited to 'src/arch/x86/predecoder.cc')
| -rw-r--r-- | src/arch/x86/predecoder.cc | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/src/arch/x86/predecoder.cc b/src/arch/x86/predecoder.cc index f537f92af..026b733bd 100644 --- a/src/arch/x86/predecoder.cc +++ b/src/arch/x86/predecoder.cc @@ -195,7 +195,7 @@ namespace X86ISA State nextState = ErrorState; emi.opcode.num++; //We can't handle 3+ byte opcodes right now - assert(emi.opcode.num < 3); + assert(emi.opcode.num < 4); consumeByte(); if(emi.opcode.num == 1 && nextByte == 0x0f) { @@ -203,11 +203,8 @@ namespace X86ISA DPRINTF(Predecoder, "Found two byte opcode.\n"); emi.opcode.prefixA = nextByte; } - else if(emi.opcode.num == 2 && - (nextByte == 0x0f || - (nextByte & 0xf8) == 0x38)) + else if(emi.opcode.num == 2 && (nextByte == 0x38 || nextByte == 0x3F)) { - panic("Three byte opcodes aren't yet supported!\n"); nextState = OpcodeState; DPRINTF(Predecoder, "Found three byte opcode.\n"); emi.opcode.prefixB = nextByte; |