[FFmpeg-devel] [PATCH 4/5] avfilter/vf_v360: x86 SIMD for interpolations
Paul B Mahol
onemda at gmail.com
Thu Sep 5 19:57:34 EEST 2019
On 9/5/19, James Almer <jamrial at gmail.com> wrote:
> On 9/5/2019 5:52 AM, Paul B Mahol wrote:
>> diff --git a/libavfilter/x86/vf_v360.asm b/libavfilter/x86/vf_v360.asm
>> new file mode 100644
>> index 0000000000..e1efe2e3a3
>> --- /dev/null
>> +++ b/libavfilter/x86/vf_v360.asm
>> @@ -0,0 +1,98 @@
>> +;*****************************************************************************
>> +;* x86-optimized functions for v360 filter
>> +;*
>> +;* This file is part of FFmpeg.
>> +;*
>> +;* FFmpeg is free software; you can redistribute it and/or
>> +;* modify it under the terms of the GNU Lesser General Public
>> +;* License as published by the Free Software Foundation; either
>> +;* version 2.1 of the License, or (at your option) any later version.
>> +;*
>> +;* FFmpeg is distributed in the hope that it will be useful,
>> +;* but WITHOUT ANY WARRANTY; without even the implied warranty of
>> +;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> +;* Lesser General Public License for more details.
>> +;*
>> +;* You should have received a copy of the GNU Lesser General Public
>> +;* License along with FFmpeg; if not, write to the Free Software
>> +;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
>> 02110-1301 USA
>> +;******************************************************************************
>> +
>> +%include "libavutil/x86/x86util.asm"
>> +
>> +SECTION_RODATA
>> +
>> +ALIGN 32
>
> No need for 32 byte alignment. And if there was, you should do
> SECTION_RODATA 32 instead.
Removed.
>
>> +
>> +pb_mask: db 0,4,8,12,5,5,5,5,5,5,5,5,5,5,5,5
>> +pd_255: times 4 dd 255
>> +
>> +SECTION .text
>> +
>> +; void ff_remap2_8bit_line_avx2(uint8_t *dst, int width, const uint8_t
>> *src, ptrdiff_t in_linesize,
>> +; const uint16_t *u, const uint16_t *v,
>> const int16_t *ker);
>> +
>> +%if HAVE_AVX2_EXTERNAL
>> +INIT_YMM avx2
>> +cglobal remap1_8bit_line, 6, 7, 7, dst, width, src, in_linesize, u, v, x
>> + movsxdifnidn widthq, widthd
>> + xor xq, xq
>> + movd xm0, in_linesized
>> + pcmpeqw m4, m4
>> + VBROADCASTI128 m6, [pb_mask]
>> + vpbroadcastd m0, xm0
>> +
>> + .loop:
>> + pmovsxwd m1, [vq + xq * 2]
>> + pmovsxwd m2, [uq + xq * 2]
>> +
>> + pmulld m1, m0
>
> Use pmaddwd as Hendrik suggested.
I can not use it, linesize is int.
>
>> + paddd m1, m2
>> + mova m2, m4
>> + vpgatherdd m5, [srcq + m1], m2
>> + pshufb m1, m5, m6
>> + vextracti128 xm2, m1, 1
>> + movd [dstq+xq], xm1
>> + movd [dstq+xq+4], xm2
>> +
>> + add xq, mmsize / 4
>> + cmp xq, widthq
>> + jl .loop
>> + RET
>> +
>> +INIT_YMM avx2
>> +cglobal remap2_8bit_line, 7, 8, 8, dst, width, src, in_linesize, u, v,
>> ker, x
>> + movsxdifnidn widthq, widthd
>> + xor xq, xq
>> + movd xm0, in_linesized
>
> movd xm0, in_linesized
> %if ARCH_X86_32
> DEFINE_ARGS dst, width, src, x, u, v, ker
> %endif
> xor xq, xq
>
> That way this function will work on x86_32. Otherwise, seeing you didn't
> add a preprocessor wrapper, assembly will fail on those targets.
I will left x32 to ones that cares.
>
>> + pcmpeqw m7, m7
>> + vpbroadcastd m0, xm0
>> + movd xm6, [pd_255]
>> + vpbroadcastd m6, xm6
>> + VBROADCASTI128 m5, [pb_mask]
>> +
>> + .loop:
>> + pmovsxwd m1, [kerq + xq * 8]
>> + pmovsxwd m2, [vq + xq * 8]
>> + pmovsxwd m3, [uq + xq * 8]
>> +
>> + pmulld m4, m2, m0
>> + paddd m4, m3
>> + mova m3, m7
>> + vpgatherdd m2, [srcq + m4], m3
>> + pand m2, m6
>> + pmulld m2, m1
>
> Same for these two pmulld.
Already explained.
>
>> + phaddd m2, m2
>> + phaddd m1, m2, m2
>> + psrld m1, m1, 0xd
>> + pshufb m1, m1, m5
>> + vextracti128 xm2, m1, 1
>> +
>> + pextrb [dstq+xq], xm1, 0
>> + pextrb [dstq+xq+1], xm2, 0
>> +
>> + add xq, mmsize / 16
>> + cmp xq, widthq
>> + jl .loop
>> + RET
>> +%endif
>> diff --git a/libavfilter/x86/vf_v360_init.c
>> b/libavfilter/x86/vf_v360_init.c
>> new file mode 100644
>> index 0000000000..b781fb13d1
>> --- /dev/null
>> +++ b/libavfilter/x86/vf_v360_init.c
>> @@ -0,0 +1,43 @@
>> +/*
>> + * This file is part of FFmpeg.
>> + *
>> + * FFmpeg is free software; you can redistribute it and/or
>> + * modify it under the terms of the GNU Lesser General Public
>> + * License as published by the Free Software Foundation; either
>> + * version 2.1 of the License, or (at your option) any later version.
>> + *
>> + * FFmpeg is distributed in the hope that it will be useful,
>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + * Lesser General Public License for more details.
>> + *
>> + * You should have received a copy of the GNU Lesser General Public
>> + * License along with FFmpeg; if not, write to the Free Software
>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
>> 02110-1301 USA
>> + */
>> +
>> +#include "config.h"
>> +
>> +#include "libavutil/attributes.h"
>> +#include "libavutil/cpu.h"
>> +#include "libavutil/x86/cpu.h"
>> +#include "libavfilter/v360.h"
>> +
>> +void ff_remap1_8bit_line_avx2(uint8_t *dst, int width, const uint8_t
>> *src, ptrdiff_t in_linesize,
>> + const uint16_t *u, const uint16_t *v, const
>> int16_t *ker);
>> +
>> +void ff_remap2_8bit_line_avx2(uint8_t *dst, int width, const uint8_t
>> *src, ptrdiff_t in_linesize,
>> + const uint16_t *u, const uint16_t *v, const
>> int16_t *ker);
>> +
>> +av_cold void ff_v360_init_x86(V360Context *s, int depth)
>> +{
>> +#if ARCH_X86_64
>
> You can remove this after adding the above.
Already explained.
>
>> + int cpu_flags = av_get_cpu_flags();
>> +
>> + if (EXTERNAL_AVX2_FAST(cpu_flags) && s->interp == NEAREST && depth <=
>> 8)
>> + s->remap_line = ff_remap1_8bit_line_avx2;
>> +
>> + if (EXTERNAL_AVX2_FAST(cpu_flags) && s->interp == BILINEAR && depth
>> <= 8)
>> + s->remap_line = ff_remap2_8bit_line_avx2;
>> +#endif
>> +}
>
I plan to apply this soon.
>
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