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Allow to specify -DSSE2NEON_SUPPRESS_WARNINGS to avoid the #warning about optimization issues #651

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Nov 4, 2024
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Allow to specify -DSSE2NEON_SUPPRESS_WARNINGS to avoid the #warning about optimization issues #651

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0294162
Allow to specify -DSSE2NEON_SUPPRESS_WARNINGS to avoid the #warning a…
rouault Nov 3, 2024
09e4a8a
README.md: document SSE2NEON_SUPPRESS_WARNINGS
rouault Nov 4, 2024
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1 change: 1 addition & 0 deletions README.md
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Expand Up @@ -102,6 +102,7 @@ Considering the balance between correctness and performance, `sse2neon` recogniz
* `SSE2NEON_PRECISE_DIV`: Enable precise implementation of `_mm_rcp_ps` and `_mm_div_ps` by additional Netwon-Raphson iteration for accuracy.
* `SSE2NEON_PRECISE_SQRT`: Enable precise implementation of `_mm_sqrt_ps` and `_mm_rsqrt_ps` by additional Netwon-Raphson iteration for accuracy.
* `SSE2NEON_PRECISE_DP`: Enable precise implementation of `_mm_dp_pd`. When the conditional bit is not set, the corresponding multiplication would not be executed.
* `SSE2NEON_SUPPRESS_WARNINGS`: Set this macro to disable the warning which is emitted by default when optimizations are enabled.

The above are turned off by default, and you should define the corresponding macro(s) as `1` before including `sse2neon.h` if you need the precise implementations.

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2 changes: 1 addition & 1 deletion sse2neon.h
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Expand Up @@ -110,7 +110,7 @@
#warning "GCC versions earlier than 10 are not supported."
#endif

#ifdef __OPTIMIZE__
#if defined(__OPTIMIZE__) && !defined(SSE2NEON_SUPPRESS_WARNINGS)
#warning \
"Report any potential compiler optimization issues when using SSE2NEON. See the 'Optimization' section at https://github.com/DLTcollab/sse2neon."
#endif
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