cmake: Allow build system to disable loongarch intrinsics

CMakeLists.txt

@@ -1020,6 +1020,14 @@ if(NOT HAVE_SSE3)
   set(SDL_DISABLE_SSE3 1)
 endif()
 
+if(NOT HAVE_LSX)
+  set(SDL_DISABLE_LSX 1)
+endif()
+
+if(NOT HAVE_LASX)
+  set(SDL_DISABLE_LASX 1)
+endif()
+
 # TODO: Can't deactivate on FreeBSD? w/o LIBC, SDL_stdinc.h can't define
 # anything.
 if(SDL_LIBC)

include/SDL3/SDL_intrin.h

@@ -93,13 +93,11 @@ _m_prefetch(void *__P)
 #endif
 #endif /* compiler version */
 
-#if defined(__loongarch_sx) && !defined(SDL_DISABLE_LSX_H)
+#if defined(__loongarch_sx) && !defined(SDL_DISABLE_LSX)
 #include <lsxintrin.h>
-#define __LSX__
 #endif
-#if defined(__loongarch_asx) && !defined(SDL_DISABLE_LASX_H)
+#if defined(__loongarch_asx) && !defined(SDL_DISABLE_LASX)
 #include <lasxintrin.h>
-#define __LASX__
 #endif
 #if defined(__AVX__) && !defined(SDL_DISABLE_AVX)
 #include <immintrin.h>

include/build_config/SDL_build_config.h.cmake

@@ -592,5 +592,7 @@ typedef unsigned int uintptr_t;
 #cmakedefine SDL_DISABLE_SSE3 1
 #cmakedefine SDL_DISABLE_AVX 1
 #cmakedefine SDL_DISABLE_MMX 1
+#cmakedefine SDL_DISABLE_LSX 1
+#cmakedefine SDL_DISABLE_LASX 1
 
 #endif /* SDL_build_config_h_ */

src/SDL_internal.h

@@ -211,6 +211,14 @@
 #define HAVE_AVX_INTRINSICS 1
 #endif
 
+#if defined(__loongarch_sx) && !defined(SDL_DISABLE_LSX)
+#define HAVE_LSX_INTRINSICS 1
+#endif
+
+#if defined(__loongarch_asx) && !defined(SDL_DISABLE_LASX)
+#define HAVE_LASX_INTRINSICS 1
+#endif
+
 #if defined __clang__
 #if (!__has_attribute(target))
 #undef HAVE_AVX_INTRINSICS

src/video/SDL_yuv.c

@@ -419,7 +419,7 @@ static SDL_bool yuv_rgb_lsx(
     Uint8 *rgb, Uint32 rgb_stride,
     YCbCrType yuv_type)
 {
-#ifdef __loongarch_sx
+#if HAVE_LSX_INTRINSICS
     if (!SDL_HasLSX()) {
         return SDL_FALSE;
     }

src/video/yuv2rgb/yuv_rgb.c

@@ -684,7 +684,7 @@ void rgb24_yuv420_sseu(uint32_t width, uint32_t height,
 
 #endif //HAVE_SSE2_INTRINSICS
 
-#ifdef __loongarch_sx
+#if HAVE_LSX_INTRINSICS
 
 #define LSX_FUNCTION_NAME	yuv420_rgb24_lsx
 #define STD_FUNCTION_NAME	yuv420_rgb24_std
@@ -716,6 +716,6 @@ void rgb24_yuv420_sseu(uint32_t width, uint32_t height,
 #define RGB_FORMAT			RGB_FORMAT_ABGR
 #include "yuv_rgb_lsx_func.h"
 
-#endif  //__loongarch_sx
+#endif  //HAVE_LSX_INTRINSICS
 
 #endif /* SDL_HAVE_YUV */