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[smooth] Detect SSE2 with MSVC for x86 

MSVC does not set `__SSE2__`. Instead one must check whether `_M_IX86_FP` is
defined and greater than or equal to 2.

* src/smooth/ftgrays.c (FT_SSE2): New macro.
Use it where appropriate.
This commit is contained in:
Ben Wagner 2021-08-26 16:12:22 -04:00 committed by Werner Lemberg
parent 3785393d1a
commit a842a0984b
1 changed files with 13 additions and 6 deletions
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19
src/smooth/ftgrays.c
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@ -999,10 +999,17 @@ typedef ptrdiff_t FT_PtrDist;
*
* For other cases, using binary splits is actually slightly faster.
*/
#if defined( __SSE2__ ) || \
defined( __x86_64__ ) || \
#if defined( __SSE2__ ) || \
defined( __x86_64__ ) || \
defined( _M_AMD64 ) || \
( defined( _M_IX86_FP ) && _M_IX86_FP >= 2 )
# define FT_SSE2 1
#else
# define FT_SSE2 0
#endif
#if FT_SSE2 || \
defined( __aarch64__ ) || \
defined( _M_AMD64 ) || \
defined( _M_ARM64 )
# define BEZIER_USE_DDA 1
#else
@ -1022,7 +1029,7 @@ typedef ptrdiff_t FT_PtrDist;
#if BEZIER_USE_DDA
#ifdef __SSE2__
#if FT_SSE2
# include <emmintrin.h>
#endif
@ -1135,7 +1142,7 @@ typedef ptrdiff_t FT_PtrDist;
* = (B << (33 - N)) + (A << (32 - 2*N))
*/
#ifdef __SSE2__
#if FT_SSE2
/* Experience shows that for small shift values, */
/* SSE2 is actually slower. */
if ( shift > 2 )
@ -1192,7 +1199,7 @@ typedef ptrdiff_t FT_PtrDist;
return;
}
#endif /* __SSE2__ */
#endif /* FT_SSE2 */
rx = LEFT_SHIFT( ax, 33 - 2 * shift );
ry = LEFT_SHIFT( ay, 33 - 2 * shift );