[FFmpeg-devel] [PATCH 1/8] configure: test whether x86 assembler supports AVX-512

[Hendrik Leppkes]

On Mon, Oct 30, 2017 at 2:08 PM, James Darnley <jdarnley at obe.tv> wrote:
> ---
>  configure | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/configure b/configure
> index 2f259996ae..e172fe8571 100755
> --- a/configure
> +++ b/configure
> @@ -406,6 +406,7 @@ Optimization options (experts only):
>    --disable-fma3           disable FMA3 optimizations
>    --disable-fma4           disable FMA4 optimizations
>    --disable-avx2           disable AVX2 optimizations
> +  --disable-avx-512        disable AVX-512 optimizations

This should be avx512, to match the configure variable

>    --disable-aesni          disable AESNI optimizations
>    --disable-armv5te        disable armv5te optimizations
>    --disable-armv6          disable armv6 optimizations
> @@ -1840,6 +1841,7 @@ ARCH_EXT_LIST_X86_SIMD="
>      amd3dnowext
>      avx
>      avx2
> +    avx512
>      fma3
>      fma4
>      mmx
> @@ -2364,6 +2366,7 @@ xop_deps="avx"
>  fma3_deps="avx"
>  fma4_deps="avx"
>  avx2_deps="avx"
> +avx512_deps="avx2"
>
>  mmx_external_deps="x86asm"
>  mmx_inline_deps="inline_asm"
> @@ -5669,6 +5672,7 @@ EOF
>              elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
>          esac
>
> +        check_x86asm "vmovdqa32 [eax]{k1}{z}, zmm0"    || disable avx512_external
>          check_x86asm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
>          check_x86asm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
>          check_x86asm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
> @@ -6800,6 +6804,7 @@ if enabled x86; then
>      echo "AESNI enabled             ${aesni-no}"
>      echo "AVX enabled               ${avx-no}"
>      echo "AVX2 enabled              ${avx2-no}"
> +    echo "AVX-512 enabled           ${avx512-no}"
>      echo "XOP enabled               ${xop-no}"
>      echo "FMA3 enabled              ${fma3-no}"
>      echo "FMA4 enabled              ${fma4-no}"
> --
> 2.14.2
>
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