mirror of
https://github.com/FFmpeg/FFmpeg.git
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96 lines
2.7 KiB
NASM
96 lines
2.7 KiB
NASM
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;*****************************************************************************
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;* SIMD-optimized MPEG encoding functions
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;*****************************************************************************
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;* Copyright (c) 2000, 2001 Fabrice Bellard
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;* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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;*
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;* This file is part of Libav.
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;*
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;* Libav 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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;* Libav 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 Libav; 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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INIT_MMX mmx
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; int ff_pix_sum16_mmx(uint8_t *pix, int line_size)
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cglobal pix_sum16, 2, 3
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movsxdifnidn r1, r1d
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mov r2, r1
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neg r2
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shl r2, 4
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sub r0, r2
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pxor m7, m7
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pxor m6, m6
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.loop:
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mova m0, [r0+r2+0]
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mova m1, [r0+r2+0]
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mova m2, [r0+r2+8]
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mova m3, [r0+r2+8]
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punpcklbw m0, m7
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punpckhbw m1, m7
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punpcklbw m2, m7
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punpckhbw m3, m7
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paddw m1, m0
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paddw m3, m2
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paddw m3, m1
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paddw m6, m3
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add r2, r1
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js .loop
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mova m5, m6
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psrlq m6, 32
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paddw m6, m5
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mova m5, m6
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psrlq m6, 16
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paddw m6, m5
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movd eax, m6
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and eax, 0xffff
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RET
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INIT_MMX mmx
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; int ff_pix_norm1_mmx(uint8_t *pix, int line_size)
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cglobal pix_norm1, 2, 4
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movsxdifnidn r1, r1d
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mov r2, 16
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pxor m0, m0
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pxor m7, m7
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.loop:
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mova m2, [r0+0]
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mova m3, [r0+8]
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mova m1, m2
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punpckhbw m1, m0
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punpcklbw m2, m0
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mova m4, m3
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punpckhbw m3, m0
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punpcklbw m4, m0
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pmaddwd m1, m1
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pmaddwd m2, m2
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pmaddwd m3, m3
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pmaddwd m4, m4
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paddd m2, m1
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paddd m4, m3
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paddd m7, m2
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add r0, r1
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paddd m7, m4
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dec r2
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jne .loop
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mova m1, m7
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psrlq m7, 32
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paddd m1, m7
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movd eax, m1
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RET
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