On 10/30/2017 10:08 AM, James Darnley wrote:
> ---
> libavutil/x86/cpu.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/libavutil/x86/cpu.c b/libavutil/x86/cpu.c
> index b22a950b79..c56f2a8754 100644
> --- a/libavutil/x86/cpu.c
> +++ b/libavutil/x86/cpu.c
> @@ -247,6 +247,8 @@ size_t ff_get_cpu_max_align_x86(void)
> {
> int flags = av_get_cpu_flags();
>
> + if (flags & AV_CPU_FLAG_AVX512)
> + return 64;
> if (flags & (AV_CPU_FLAG_AVX2 |
> AV_CPU_FLAG_AVX |
> AV_CPU_FLAG_XOP |
>
av_get_cpu_max_align() is not currently being used to align buffers in
libavutil/libavcodec, so you also need to change the STRIDE_ALIGN
constant to 64 before you can feasibly start using avx512 functions.
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