1/*
2 * inline assembly helper macros
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21#ifndef AVCODEC_X86_INLINE_ASM_H
22#define AVCODEC_X86_INLINE_ASM_H
23
24#include "constants.h"
25
26#define MOVQ_WONE(regd) \
27    __asm__ volatile ( \
28    "pcmpeqd %%" #regd ", %%" #regd " \n\t" \
29    "psrlw $15, %%" #regd ::)
30
31#define JUMPALIGN()     __asm__ volatile (".p2align 3"::)
32#define MOVQ_ZERO(regd) __asm__ volatile ("pxor %%"#regd", %%"#regd ::)
33
34#define MOVQ_BFE(regd)                                  \
35    __asm__ volatile (                                  \
36        "pcmpeqd %%"#regd", %%"#regd"   \n\t"           \
37        "paddb   %%"#regd", %%"#regd"   \n\t" ::)
38
39#ifndef PIC
40#define MOVQ_WTWO(regd) __asm__ volatile ("movq %0, %%"#regd" \n\t" :: "m"(ff_wtwo))
41#else
42// for shared library it's better to use this way for accessing constants
43// pcmpeqd -> -1
44#define MOVQ_WTWO(regd)                                 \
45    __asm__ volatile (                                  \
46        "pcmpeqd %%"#regd", %%"#regd"   \n\t"           \
47        "psrlw         $15, %%"#regd"   \n\t"           \
48        "psllw          $1, %%"#regd"   \n\t"::)
49
50#endif
51
52// using regr as temporary and for the output result
53// first argument is unmodifed and second is trashed
54// regfe is supposed to contain 0xfefefefefefefefe
55#define PAVGB_MMX_NO_RND(rega, regb, regr, regfe)                \
56    "movq   "#rega", "#regr"            \n\t"                    \
57    "pand   "#regb", "#regr"            \n\t"                    \
58    "pxor   "#rega", "#regb"            \n\t"                    \
59    "pand  "#regfe", "#regb"            \n\t"                    \
60    "psrlq       $1, "#regb"            \n\t"                    \
61    "paddb  "#regb", "#regr"            \n\t"
62
63#define PAVGB_MMX(rega, regb, regr, regfe)                       \
64    "movq   "#rega", "#regr"            \n\t"                    \
65    "por    "#regb", "#regr"            \n\t"                    \
66    "pxor   "#rega", "#regb"            \n\t"                    \
67    "pand  "#regfe", "#regb"            \n\t"                    \
68    "psrlq       $1, "#regb"            \n\t"                    \
69    "psubb  "#regb", "#regr"            \n\t"
70
71// mm6 is supposed to contain 0xfefefefefefefefe
72#define PAVGBP_MMX_NO_RND(rega, regb, regr,  regc, regd, regp)   \
73    "movq  "#rega", "#regr"             \n\t"                    \
74    "movq  "#regc", "#regp"             \n\t"                    \
75    "pand  "#regb", "#regr"             \n\t"                    \
76    "pand  "#regd", "#regp"             \n\t"                    \
77    "pxor  "#rega", "#regb"             \n\t"                    \
78    "pxor  "#regc", "#regd"             \n\t"                    \
79    "pand    %%mm6, "#regb"             \n\t"                    \
80    "pand    %%mm6, "#regd"             \n\t"                    \
81    "psrlq      $1, "#regb"             \n\t"                    \
82    "psrlq      $1, "#regd"             \n\t"                    \
83    "paddb "#regb", "#regr"             \n\t"                    \
84    "paddb "#regd", "#regp"             \n\t"
85
86#define PAVGBP_MMX(rega, regb, regr, regc, regd, regp)           \
87    "movq  "#rega", "#regr"             \n\t"                    \
88    "movq  "#regc", "#regp"             \n\t"                    \
89    "por   "#regb", "#regr"             \n\t"                    \
90    "por   "#regd", "#regp"             \n\t"                    \
91    "pxor  "#rega", "#regb"             \n\t"                    \
92    "pxor  "#regc", "#regd"             \n\t"                    \
93    "pand    %%mm6, "#regb"             \n\t"                    \
94    "pand    %%mm6, "#regd"             \n\t"                    \
95    "psrlq      $1, "#regd"             \n\t"                    \
96    "psrlq      $1, "#regb"             \n\t"                    \
97    "psubb "#regb", "#regr"             \n\t"                    \
98    "psubb "#regd", "#regp"             \n\t"
99
100#endif /* AVCODEC_X86_INLINE_ASM_H */
101