2 * Copyright (c) 2012-2014 Christophe Gisquet <christophe.gisquet@gmail.com>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVCODEC_X86_DCA_H
22 #define AVCODEC_X86_DCA_H
26 #if ARCH_X86_64 && HAVE_SSE2_INLINE
27 # include "libavutil/x86/asm.h"
28 # include "libavutil/mem.h"
29 #include "libavcodec/dcadsp.h"
31 # define int8x8_fmul_int32 int8x8_fmul_int32
32 static inline void int8x8_fmul_int32(av_unused DCADSPContext *dsp,
33 float *dst, const int8_t *src, int scale)
35 DECLARE_ALIGNED(16, static const uint32_t, inverse16) = 0x3D800000;
37 "cvtsi2ss %2, %%xmm0 \n\t"
38 "mulss %3, %%xmm0 \n\t"
39 "movq (%1), %%xmm1 \n\t"
40 "punpcklbw %%xmm1, %%xmm1 \n\t"
41 "movaps %%xmm1, %%xmm2 \n\t"
42 "punpcklwd %%xmm1, %%xmm1 \n\t"
43 "punpckhwd %%xmm2, %%xmm2 \n\t"
44 "psrad $24, %%xmm1 \n\t"
45 "psrad $24, %%xmm2 \n\t"
46 "shufps $0, %%xmm0, %%xmm0 \n\t"
47 "cvtdq2ps %%xmm1, %%xmm1 \n\t"
48 "cvtdq2ps %%xmm2, %%xmm2 \n\t"
49 "mulps %%xmm0, %%xmm1 \n\t"
50 "mulps %%xmm0, %%xmm2 \n\t"
51 "movaps %%xmm1, 0(%0) \n\t"
52 "movaps %%xmm2, 16(%0) \n\t"
53 :: "r"(dst), "r"(src), "m"(scale), "m"(inverse16)
54 XMM_CLOBBERS_ONLY("xmm0", "xmm1", "xmm2")
58 #endif /* ARCH_X86_64 && HAVE_SSE2_INLINE */
60 #endif /* AVCODEC_X86_DCA_H */