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Don't enable SSE2 optimizations when using VC9 and older compiler

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This commit is contained in:
Maarten Bent 2020-04-23 22:38:12 +02:00
parent 8cb5f8f158
commit f1ecc2c50d
1 changed files with 4 additions and 1 deletions
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5
pngpriv.h
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@ -211,7 +211,10 @@
* enable SSE optimizations. This means that these optimizations will
* be off by default. See contrib/intel for more details.
*/
# if defined(__SSE4_1__) || defined(__AVX__) || defined(__SSSE3__) || \
# if defined(_MSC_VER) && _MSC_VER <= 1500
// Don't enable for VC9 and older: missing include file immintrin.h
# define PNG_INTEL_SSE_OPT 0
# elif defined(__SSE4_1__) || defined(__AVX__) || defined(__SSSE3__) || \
defined(__SSE2__) || defined(_M_X64) || defined(_M_AMD64) || \
(defined(_M_IX86_FP) && _M_IX86_FP >= 2)
# define PNG_INTEL_SSE_OPT 1