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https://git.ffmpeg.org/ffmpeg.git
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bbe95f7353
From x86inc: > On AMD cpus <=K10, an ordinary ret is slow if it immediately follows either > a branch or a branch target. So switch to a 2-byte form of ret in that case. > We can automatically detect "follows a branch", but not a branch target. > (SSSE3 is a sufficient condition to know that your cpu doesn't have this problem.) x86inc can automatically determine whether to use REP_RET rather than REP in most of these cases, so impact is minimal. Additionally, a few REP_RETs were used unnecessary, despite the return being nowhere near a branch. The only CPUs affected were AMD K10s, made between 2007 and 2011, 16 years ago and 12 years ago, respectively. In the future, everyone involved with x86inc should consider dropping REP_RETs altogether.
135 lines
3.3 KiB
NASM
135 lines
3.3 KiB
NASM
;*****************************************************************************
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;* x86-optimized functions for framerate filter
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;*
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;* Copyright (C) 2018 Marton Balint
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;*
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;* Based on vf_blend.asm, Copyright (C) 2015 Paul B Mahol
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;*
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;* This file is part of FFmpeg.
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;*
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;* FFmpeg is free software; you can redistribute it and/or
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;* modify it under the terms of the GNU Lesser General Public
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;* License as published by the Free Software Foundation; either
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;* version 2.1 of the License, or (at your option) any later version.
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;*
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;* FFmpeg is distributed in the hope that it will be useful,
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;* but WITHOUT ANY WARRANTY; without even the implied warranty of
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;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;* Lesser General Public License for more details.
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;*
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;* You should have received a copy of the GNU Lesser General Public
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;* License along with FFmpeg; if not, write to the Free Software
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;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;******************************************************************************
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%include "libavutil/x86/x86util.asm"
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SECTION .text
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%macro XSPLAT 3
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%if cpuflag(avx2)
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vpbroadcast%3 %1, %2
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%else
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movd %1, %2
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%ifidn %3, d
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SPLATD %1
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%else
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SPLATW %1, %1
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%endif
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%endif
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%endmacro
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%macro BLEND_INIT 0-1
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%if ARCH_X86_64
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cglobal blend_frames%1, 6, 9, 5, src1, src1_linesize, src2, src2_linesize, dst, dst_linesize, width, end, x
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mov widthd, dword widthm
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%else
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cglobal blend_frames%1, 5, 7, 5, src1, src1_linesize, src2, src2_linesize, dst, end, x
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%define dst_linesizeq r5mp
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%define widthq r6mp
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%endif
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mov endd, dword r7m
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add src1q, widthq
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add src2q, widthq
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add dstq, widthq
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neg widthq
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%endmacro
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%macro BLEND_LOOP 4
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.nextrow:
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mov xq, widthq
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.loop:
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movu m0, [src1q + xq]
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movu m1, [src2q + xq]
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SBUTTERFLY %1%2, 0, 1, 4 ; aAbBcCdD
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; eEfFgGhH
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pmadd%3 m0, m2
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pmadd%3 m1, m2
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padd%2 m0, m3
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padd%2 m1, m3
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psrl%2 m0, %4 ; 0A0B0C0D
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psrl%2 m1, %4 ; 0E0F0G0H
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packus%2%1 m0, m1 ; ABCDEFGH
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movu [dstq + xq], m0
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add xq, mmsize
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jl .loop
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add src1q, src1_linesizeq
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add src2q, src2_linesizeq
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add dstq, dst_linesizeq
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sub endd, 1
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jg .nextrow
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RET
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%endmacro
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%macro BLEND_FRAMES 0
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BLEND_INIT
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XSPLAT m2, r8m, w ; factor1
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XSPLAT m3, r9m, w ; factor2
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psllw m3, 8
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por m2, m3 ; interleaved factors
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XSPLAT m3, r10m, w ; half
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BLEND_LOOP b, w, ubsw, 7
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%endmacro
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%macro BLEND_FRAMES16 0
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BLEND_INIT 16
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XSPLAT m2, r8m, d ; factor1
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XSPLAT m3, r9m, d ; factor2
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pslld m3, 16
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por m2, m3 ; interleaved factors
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XSPLAT m3, r10m, d ; half
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BLEND_LOOP w, d, wd, 15
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%endmacro
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INIT_XMM ssse3
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BLEND_FRAMES
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INIT_XMM sse4
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BLEND_FRAMES16
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%if HAVE_AVX2_EXTERNAL
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INIT_YMM avx2
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BLEND_FRAMES
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BLEND_FRAMES16
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%endif
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