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e9da9a3111
Removes a false dependency on existing contents of the 2nd dst register, giving better performance for OOE.
36 lines
1.3 KiB
NASM
36 lines
1.3 KiB
NASM
;******************************************************************************
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;* x86 utility macros for libavresample
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;* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
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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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%macro S16_TO_S32_SX 2 ; src/low dst, high dst
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%if cpuflag(sse4)
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pmovsxwd m%2, m%1
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psrldq m%1, 8
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pmovsxwd m%1, m%1
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SWAP %1, %2
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%else
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mova m%2, m%1
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punpckhwd m%2, m%2
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punpcklwd m%1, m%1
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psrad m%2, 16
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psrad m%1, 16
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%endif
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%endmacro
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