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Adds guidance for using SVE2 intrinsics

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Gabriel Wang 2026-05-24 10:33:27 +08:00
parent a8d2a31d2f
commit 8e01cbcb58
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23
include/SDL3/SDL_intrin.h
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@ -90,6 +90,29 @@
*
* If this macro is defined, SDL will only included `<arm_sve.h>` when
* the compiler defines __ARM_FEATURE_SVE.
*
* If you want to use SVE intrinsics, please check the guidance below:
*
* a. Check whether existing SVE dedicated C source files are the right
* place for your code. If so, please go to step f.
* b. Create dedicated C source files for your code.
* c. Add your C source files to the SVE2 section in CMakeLists.txt.
* d. Create a compilation protection scope using SDL_SVE2_INTRINSICS
* in your C source files after including SDL_internal.h.
* e. Include arm_sve.h inside the scope mentioned above as shown below:
*
* #if defined(SDL_PLATFORM_ANDROID) && SDL_PLATFORM_ANDROID
* # ifndef __ARM_FEATURE_SVE
* # define __ARM_FEATURE_SVE 1
* # endif
* #endif
* #include <arm_sve.h>
*
* NOTE: SDL encourages placing code in existing C source file. Please
* check with maintainers before creating new C source files.
*
* f. Apply SDL_TARGET("arch=armv8-a+sve2") or equivalent to individual
* functions you added inside the SDL_SVE2_INTRINSICS protected scope.
*
* \since This macro is available since SDL 3.6.0.
*/