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mem: Choose alignment at compile time depending on AVX enabledness.

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-05-10 03:15:42 +02:00
parent 53789a27f8
commit 08675bb399
1 changed files with 6 additions and 4 deletions
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10
libavutil/mem.c
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@ -57,6 +57,8 @@ void free(void *ptr);
#endif /* MALLOC_PREFIX */
#define ALIGN (HAVE_AVX ? 32 : 16)
/* You can redefine av_malloc and av_free in your project to use your
memory allocator. You do not need to suppress this file because the
linker will do it automatically. */
@ -73,17 +75,17 @@ void *av_malloc(size_t size)
return NULL;
#if CONFIG_MEMALIGN_HACK
ptr = malloc(size+32);
ptr = malloc(size+ALIGN);
if(!ptr)
return ptr;
diff= ((-(long)ptr - 1)&31) + 1;
diff= ((-(long)ptr - 1)&(ALIGN-1)) + 1;
ptr = (char*)ptr + diff;
((char*)ptr)[-1]= diff;
#elif HAVE_POSIX_MEMALIGN
if (posix_memalign(&ptr,32,size))
if (posix_memalign(&ptr,ALIGN,size))
ptr = NULL;
#elif HAVE_MEMALIGN
ptr = memalign(32,size);
ptr = memalign(ALIGN,size);
/* Why 64?
Indeed, we should align it:
on 4 for 386