38 lines
1.4 KiB
NASM
38 lines
1.4 KiB
NASM
;******************************************************************************
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;* VP9 IDCT SIMD optimizations
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;*
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;* Copyright (C) 2013 Clément Bœsch <u pkh me>
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;* Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
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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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%macro VP9_IWHT4_1D 0
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SWAP 1, 2, 3
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paddw m0, m2
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psubw m3, m1
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psubw m4, m0, m3
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psraw m4, 1
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psubw m5, m4, m1
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SWAP 5, 1
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psubw m4, m2
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SWAP 4, 2
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psubw m0, m1
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paddw m3, m2
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SWAP 3, 2, 1
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%endmacro
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