lib/x86/cpu_features.h: drop evex512 on gcc-16#427
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ebiggers merged 2 commits intoebiggers:masterfrom May 22, 2025
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gcc-16 `master` branch dropped support for `evex512` as:
https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=c052a6f4a1c803cb92147ff98fb91cf3511e0856
As a result libdeflate build started failing as:
In file included from /build/source/lib/adler32.c:28:
/build/source/lib/x86/adler32_template.h:135:12: error: attribute 'target' argument 'no-evex512' is unknown
135 | ADD_SUFFIX(reduce_to_32bits)(vec_t v_s1, vec_t v_s2, u32 *s1_p, u32 *s2_p)
| ^~~~~~~~~~~~~~~~
The change adds upper build to `evex512` for `gcc`.
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I think evex512 will be removed from GCC 15.2.0 also. So it might just make sense to remove all references to it since it will never be supported in HW alone. |
`-mavx*` set of options now enable `EVEX` where required without a separate flag. Let's drop explicit use of `-mevex512` as it was dropped in `gcc-16.`
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Author
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Sounds good! Added extra |
Owner
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I'll merge this. Unfortunately this will regress #394 (FYI @lambdadog), but they are just going to have to stop using |
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gcc-16
masterbranch dropped support forevex512as:https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=c052a6f4a1c803cb92147ff98fb91cf3511e0856
As a result libdeflate build started failing as:
The change adds upper build to
evex512forgcc.