Centralize and expand SDL3 SIMD compat

Author: Starbuck5

src_c/_surface.h

@@ -27,4 +27,28 @@
 #include "_pygame.h"
 #include "surface.h"
 
+// Some simd compat stuff going here for now.
+#if PG_SDL3
+// SDL3 no longer includes intrinsics by default, we need to do it explicitly
+#include <SDL3/SDL_intrin.h>
+
+/* If SDL_AVX2_INTRINSICS is defined by SDL3, we need to set macros that our
+ * code checks for avx2 build time support */
+#ifdef SDL_AVX2_INTRINSICS
+#ifndef HAVE_IMMINTRIN_H
+#define HAVE_IMMINTRIN_H 1
+#endif /* HAVE_IMMINTRIN_H*/
+#ifndef __AVX2__
+#define __AVX2__
+#endif /* __AVX2__*/
+#endif /* SDL_AVX2_INTRINSICS*/
+
+// TODO reenable this to test best
+#ifdef SDL_SSE2_INTRINSICS
+#ifndef __SSE2__
+#define __SSE2__
+#endif /* __SSE2__*/
+#endif /* SDL_SSE2_INTRINSICS*/
+#endif /* PG_SDL3 */
+
 #endif

src_c/simd_transform.h

@@ -1,24 +1,6 @@
 #define NO_PYGAME_C_API
 #include "_surface.h"
 
-/* TODO: This compat code should probably go in some place like simd_shared.h
- * That header file however is inconsistently used at the moment and not
- * included wherever it should be.
- * this block will be needed by simd_blitters and simd_fill */
-
-#if PG_SDL3
-// SDL3 no longer includes intrinsics by default, we need to do it explicitly
-#include <SDL3/SDL_intrin.h>
-
-/* If SDL_AVX2_INTRINSICS is defined by SDL3, we need to set macros that our
- * code checks for avx2 build time support */
-#ifdef SDL_AVX2_INTRINSICS
-#ifndef HAVE_IMMINTRIN_H
-#define HAVE_IMMINTRIN_H 1
-#endif /* HAVE_IMMINTRIN_H*/
-#endif /* SDL_AVX2_INTRINSICS*/
-#endif /* PG_SDL3 */
-
 /**
  * MACRO borrowed from SSE2NEON - useful for making the shuffling family of
  * intrinsics easier to understand by indicating clearly what will go where.