2 * SIMD-optimized IDCT-related routines
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * MMX optimization by Nick Kurshev <nickols_k@mail.ru>
8 * This file is part of FFmpeg.
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "libavutil/cpu.h"
27 #include "libavutil/x86/asm.h"
29 #include "inline_asm.h"
33 void ff_put_pixels_clamped_mmx(const int16_t *block
, uint8_t *pixels
,
44 "movq (%3), %%mm0 \n\t"
45 "movq 8(%3), %%mm1 \n\t"
46 "movq 16(%3), %%mm2 \n\t"
47 "movq 24(%3), %%mm3 \n\t"
48 "movq 32(%3), %%mm4 \n\t"
49 "movq 40(%3), %%mm5 \n\t"
50 "movq 48(%3), %%mm6 \n\t"
51 "movq 56(%3), %%mm7 \n\t"
52 "packuswb %%mm1, %%mm0 \n\t"
53 "packuswb %%mm3, %%mm2 \n\t"
54 "packuswb %%mm5, %%mm4 \n\t"
55 "packuswb %%mm7, %%mm6 \n\t"
56 "movq %%mm0, (%0) \n\t"
57 "movq %%mm2, (%0, %1) \n\t"
58 "movq %%mm4, (%0, %1, 2) \n\t"
59 "movq %%mm6, (%0, %2) \n\t"
60 :: "r" (pix
), "r" ((x86_reg
) line_size
), "r" ((x86_reg
) line_size
* 3),
66 // if here would be an exact copy of the code above
67 // compiler would generate some very strange code
70 "movq (%3), %%mm0 \n\t"
71 "movq 8(%3), %%mm1 \n\t"
72 "movq 16(%3), %%mm2 \n\t"
73 "movq 24(%3), %%mm3 \n\t"
74 "movq 32(%3), %%mm4 \n\t"
75 "movq 40(%3), %%mm5 \n\t"
76 "movq 48(%3), %%mm6 \n\t"
77 "movq 56(%3), %%mm7 \n\t"
78 "packuswb %%mm1, %%mm0 \n\t"
79 "packuswb %%mm3, %%mm2 \n\t"
80 "packuswb %%mm5, %%mm4 \n\t"
81 "packuswb %%mm7, %%mm6 \n\t"
82 "movq %%mm0, (%0) \n\t"
83 "movq %%mm2, (%0, %1) \n\t"
84 "movq %%mm4, (%0, %1, 2) \n\t"
85 "movq %%mm6, (%0, %2) \n\t"
86 :: "r" (pix
), "r" ((x86_reg
) line_size
), "r" ((x86_reg
) line_size
* 3),
91 void ff_add_pixels_clamped_mmx(const int16_t *block
, uint8_t *pixels
,
105 "movq (%2), %%mm0 \n\t"
106 "movq 8(%2), %%mm1 \n\t"
107 "movq 16(%2), %%mm2 \n\t"
108 "movq 24(%2), %%mm3 \n\t"
109 "movq %0, %%mm4 \n\t"
110 "movq %1, %%mm6 \n\t"
111 "movq %%mm4, %%mm5 \n\t"
112 "punpcklbw %%mm7, %%mm4 \n\t"
113 "punpckhbw %%mm7, %%mm5 \n\t"
114 "paddsw %%mm4, %%mm0 \n\t"
115 "paddsw %%mm5, %%mm1 \n\t"
116 "movq %%mm6, %%mm5 \n\t"
117 "punpcklbw %%mm7, %%mm6 \n\t"
118 "punpckhbw %%mm7, %%mm5 \n\t"
119 "paddsw %%mm6, %%mm2 \n\t"
120 "paddsw %%mm5, %%mm3 \n\t"
121 "packuswb %%mm1, %%mm0 \n\t"
122 "packuswb %%mm3, %%mm2 \n\t"
123 "movq %%mm0, %0 \n\t"
124 "movq %%mm2, %1 \n\t"
125 : "+m" (*pix
), "+m" (*(pix
+ line_size
))
128 pix
+= line_size
* 2;
133 #endif /* HAVE_INLINE_ASM */