56 lines
1.7 KiB
NASM
56 lines
1.7 KiB
NASM
;******************************************************************************
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;* MMX/SSE2-optimized functions for the RV30 and RV40 decoders
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;* Copyright (C) 2012 Christophe Gisquet <christophe.gisquet@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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%include "x86inc.asm"
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%include "x86util.asm"
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SECTION .text
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%macro IDCT_DC_NOROUND 1
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imul %1, 13*13*3
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sar %1, 11
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%endmacro
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%macro IDCT_DC_ROUND 1
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imul %1, 13*13
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add %1, 0x200
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sar %1, 10
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%endmacro
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%macro rv34_idct_dequant4x4_dc 1
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cglobal rv34_idct_dequant4x4_%1_mmx2, 1, 2, 0
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movsx r1, word [r0]
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IDCT_DC r1
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movd mm0, r1d
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pshufw mm0, mm0, 0
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movq [r0+ 0], mm0
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movq [r0+16], mm0
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movq [r0+32], mm0
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movq [r0+48], mm0
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REP_RET
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%endmacro
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INIT_MMX
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%define IDCT_DC IDCT_DC_ROUND
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rv34_idct_dequant4x4_dc dc
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%define IDCT_DC IDCT_DC_NOROUND
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rv34_idct_dequant4x4_dc dc_noround
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