mirror of
https://github.com/FFmpeg/FFmpeg.git
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119 lines
3.0 KiB
NASM
119 lines
3.0 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 1
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cglobal rv34_idct_%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 m0, r1d
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pshufw m0, m0, 0
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movq [r0+ 0], m0
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movq [r0+ 8], m0
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movq [r0+16], m0
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movq [r0+24], m0
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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 dc
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%define IDCT_DC IDCT_DC_NOROUND
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rv34_idct dc_noround
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; ff_rv34_idct_dc_add_mmx(uint8_t *dst, int stride, int dc);
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cglobal rv34_idct_dc_add_mmx, 3, 3
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; calculate DC
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IDCT_DC_ROUND r2
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pxor m1, m1
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movd m0, r2d
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psubw m1, m0
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packuswb m0, m0
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packuswb m1, m1
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punpcklbw m0, m0
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punpcklbw m1, m1
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punpcklwd m0, m0
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punpcklwd m1, m1
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; add DC
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lea r2, [r0+r1*2]
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movh m2, [r0]
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movh m3, [r0+r1]
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movh m4, [r2]
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movh m5, [r2+r1]
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paddusb m2, m0
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paddusb m3, m0
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paddusb m4, m0
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paddusb m5, m0
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psubusb m2, m1
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psubusb m3, m1
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psubusb m4, m1
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psubusb m5, m1
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movh [r0], m2
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movh [r0+r1], m3
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movh [r2], m4
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movh [r2+r1], m5
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RET
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; ff_rv34_idct_dc_add_sse4(uint8_t *dst, int stride, int dc);
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INIT_XMM
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cglobal rv34_idct_dc_add_sse4, 3, 3, 6
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; load data
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IDCT_DC_ROUND r2
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pxor m1, m1
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; calculate DC
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movd m0, r2d
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lea r2, [r0+r1*2]
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movd m2, [r0]
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movd m3, [r0+r1]
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pshuflw m0, m0, 0
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movd m4, [r2]
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movd m5, [r2+r1]
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punpcklqdq m0, m0
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punpckldq m2, m3
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punpckldq m4, m5
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punpcklbw m2, m1
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punpcklbw m4, m1
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paddw m2, m0
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paddw m4, m0
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packuswb m2, m4
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movd [r0], m2
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pextrd [r0+r1], m2, 1
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pextrd [r2], m2, 2
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pextrd [r2+r1], m2, 3
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RET
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