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avutil/mem_internal: define DECLARE_ALIGNED as C11's alignas

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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.

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
This commit is contained in:
Zhao Zhili 2024-11-15 22:09:02 +08:00
parent fe2c9746de
commit 57861911a3
1 changed files with 8 additions and 19 deletions
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27
libavutil/mem_internal.h
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@ -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