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2009 Mar 23
2
[LLVMdev] X86InstrFormats.td Question
I'm looking at the instruction formats and I can't grok the comments. For example: // SSSE3 Instruction Templates: // // SS38I - SSSE3 instructions with T8 prefix. // SS3AI - SSSE3 instructions with TA prefix. // Where are these prefix names coming from? I can't find any mention of them in the Intel literature. Also, there's this curious table: // Prefix byte classes which are used to indicate to the ad-hoc machine code // emitter that various prefix byte...
2009 Mar 23
0
[LLVMdev] X86InstrFormats.td Question
On Mar 23, 2009, at 12:57 PM, David A. Greene wrote: > I'm looking at the instruction formats and I can't grok the > comments. For > example: > > // SSSE3 Instruction Templates: > // > // SS38I - SSSE3 instructions with T8 prefix. > // SS3AI - SSSE3 instructions with TA prefix. > // > > Where are these prefix names coming from? I can't find any mention > of them in > the Intel literature. They come from the fact that the SSSE3 instructions begin with 0F 38 or 0F 3A. > > Also, there's this curious tab...