[Git][freetype/freetype][master] [smooth] Detect SSE2 with MSVC for x86

[Werner Lemberg (@wl)]

Werner Lemberg pushed to branch master at FreeType / FreeType

Commits:

• a842a098
  by Ben Wagner at 2021-08-27T09:20:26+02:00

  [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.
  

1 changed file:

• src/smooth/ftgrays.c

Changes:

src/smooth/ftgrays.c

---

...	...	@@ -999,10 +999,17 @@ typedef ptrdiff_t FT_PtrDist;
999	999	*
1000	1000	* For other cases, using binary splits is actually slightly faster.
1001	1001	*/
1002		-#if defined( __SSE2__ ) || \
1003		- defined( __x86_64__ ) || \
	1002	+#if defined( __SSE2__ ) || \
	1003	+ defined( __x86_64__ ) || \
	1004	+ defined( _M_AMD64 ) || \
	1005	+ ( defined( _M_IX86_FP ) && _M_IX86_FP >= 2 )
	1006	+# define FT_SSE2 1
	1007	+#else
	1008	+# define FT_SSE2 0
	1009	+#endif
	1010	+
	1011	+#if FT_SSE2 || \
1004	1012	defined( __aarch64__ ) || \
1005		- defined( _M_AMD64 ) || \
1006	1013	defined( _M_ARM64 )
1007	1014	# define BEZIER_USE_DDA 1
1008	1015	#else
...	...	@@ -1022,7 +1029,7 @@ typedef ptrdiff_t FT_PtrDist;
1022	1029
1023	1030	#if BEZIER_USE_DDA
1024	1031
1025		-#ifdef __SSE2__
	1032	+#if FT_SSE2
1026	1033	# include <emmintrin.h>
1027	1034	#endif
1028	1035
...	...	@@ -1135,7 +1142,7 @@ typedef ptrdiff_t FT_PtrDist;
1135	1142	* = (B << (33 - N)) + (A << (32 - 2*N))
1136	1143	*/
1137	1144
1138		-#ifdef __SSE2__
	1145	+#if FT_SSE2
1139	1146	/* Experience shows that for small shift values, */
1140	1147	/* SSE2 is actually slower. */
1141	1148	if ( shift > 2 )
...	...	@@ -1192,7 +1199,7 @@ typedef ptrdiff_t FT_PtrDist;
1192	1199
1193	1200	return;
1194	1201	}
1195		-#endif /* __SSE2__ */
	1202	+#endif /* FT_SSE2 */
1196	1203
1197	1204	rx = LEFT_SHIFT( ax, 33 - 2 * shift );
1198	1205	ry = LEFT_SHIFT( ay, 33 - 2 * shift );

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