Displaying 2 results from an estimated 2 matches for "ss3ai".
Did you mean:
ss38i
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...