From: Zhao Zhili <zhiliz...@tencent.com> alignas is portable than compiler's specific __attribute__. It do have a limitation, that alignas don't support specify aligment on the declarations of struct (it works for specify alignment on struct fields), which only used by avcodec/cavs, and is removed now. --- libavutil/mem_internal.h | 27 ++++++++------------------- 1 file changed, 8 insertions(+), 19 deletions(-)
diff --git a/libavutil/mem_internal.h b/libavutil/mem_internal.h index 20f9b3e3f2..49262abf4b 100644 --- a/libavutil/mem_internal.h +++ b/libavutil/mem_internal.h @@ -24,6 +24,7 @@ #include "config.h" #include <stdint.h> +#include <stdalign.h> #include "attributes.h" #include "macros.h" @@ -73,26 +74,14 @@ * @param v Name of the variable */ -#if defined(__INTEL_COMPILER) && __INTEL_COMPILER < 1110 || defined(__SUNPRO_C) - #define DECLARE_ALIGNED_T(n,t,v) t __attribute__ ((aligned (n))) v - #define DECLARE_ASM_ALIGNED(n,t,v) t __attribute__ ((aligned (n))) v - #define DECLARE_ASM_CONST(n,t,v) const t __attribute__ ((aligned (n))) v -#elif defined(__DJGPP__) - #define DECLARE_ALIGNED_T(n,t,v) t __attribute__ ((aligned (FFMIN(n, 16)))) v - #define DECLARE_ASM_ALIGNED(n,t,v) t av_used __attribute__ ((aligned (FFMIN(n, 16)))) v - #define DECLARE_ASM_CONST(n,t,v) static const t av_used __attribute__ ((aligned (FFMIN(n, 16)))) v -#elif defined(__GNUC__) || defined(__clang__) - #define DECLARE_ALIGNED_T(n,t,v) t __attribute__ ((aligned (n))) v - #define DECLARE_ASM_ALIGNED(n,t,v) t av_used __attribute__ ((aligned (n))) v - #define DECLARE_ASM_CONST(n,t,v) static const t av_used __attribute__ ((aligned (n))) v -#elif defined(_MSC_VER) - #define DECLARE_ALIGNED_T(n,t,v) __declspec(align(n)) t v - #define DECLARE_ASM_ALIGNED(n,t,v) __declspec(align(n)) t v - #define DECLARE_ASM_CONST(n,t,v) __declspec(align(n)) static const t v +#if defined(__DJGPP__) + #define DECLARE_ALIGNED_T(n,t,v) alignas(FFMIN(n, 16)) t v + #define DECLARE_ASM_ALIGNED(n,t,v) alignas(FFMIN(n, 16)) t av_used v + #define DECLARE_ASM_CONST(n,t,v) alignas(FFMIN(n, 16)) static const t av_used v #else - #define DECLARE_ALIGNED_T(n,t,v) t v - #define DECLARE_ASM_ALIGNED(n,t,v) t v - #define DECLARE_ASM_CONST(n,t,v) static const t v + #define DECLARE_ALIGNED_T(n,t,v) alignas(n) t v + #define DECLARE_ASM_ALIGNED(n,t,v) alignas(n) t av_used v + #define DECLARE_ASM_CONST(n,t,v) alignas(n) static const t av_used v #endif #if HAVE_SIMD_ALIGN_64 -- 2.46.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
