diff options
Diffstat (limited to 'src/arch/x86/types.hh')
| -rw-r--r-- | src/arch/x86/types.hh | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/arch/x86/types.hh b/src/arch/x86/types.hh index 956ec3216..6fd36b487 100644 --- a/src/arch/x86/types.hh +++ b/src/arch/x86/types.hh @@ -156,8 +156,10 @@ namespace X86ISA uint8_t num; //The first byte detected in a 2+ byte opcode. Should be 0xF0. uint8_t prefixA; - //The second byte detected in a 3+ byte opcode. Could be 0xF0 for - //3dnow instructions, or 0x38-0x3F for some SSE instructions. + //The second byte detected in a 3+ byte opcode. Could be 0x38-0x3F + //for some SSE instructions. 3dNow! instructions are handled as + //two byte opcodes and then split out further by the immediate + //byte. uint8_t prefixB; //The main opcode byte. The highest addressed byte in the opcode. Opcode op; |