Displaying 2 results from an estimated 2 matches for "soif".
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sof
2020 Aug 31
2
Proposal to remove MMX support.
...with assembly code. For the MMX
> intrinsics in particular, code that’s using intrinsics is likely to also be
> using inline asm, so the interaction is important.
>
>
It is a compile-time error to use MMX ("y" constraint) operands and outputs
for inline-asm with MMX disabled. SoIf _mm_empty() only becomes a no-op
when MMX is disabled, that should address the vast majority of the issue.
There is a case where it can go wrong, still: it is not an error to use MMX
in asm, even with mmx disabled. Thus it is possible that an inline-asm
statement which has no MMX ins/outs, but whi...
2020 Aug 30
3
Proposal to remove MMX support.
I recently diagnosed a bug in someone else's software, which turned out to
be due to incorrect MMX intrinsics usage: if you use any of the x86
intrinsics that accept or return __m64 values, then you, the *programmer* are
required to call _mm_empty() before using any x87 floating point
instructions or leaving the function. I was aware that this was required at
the assembly-level, but not that