1 /*
2 * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
3 * Copyright (c) 2015 Zhou Xiaoyong <zhouxiaoyong@loongson.cn>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #ifndef AVCODEC_MIPS_MATHOPS_H
23 #define AVCODEC_MIPS_MATHOPS_H
24
25 #include <stdint.h>
26 #include "config.h"
27 #include "libavutil/common.h"
28
29 #if HAVE_INLINE_ASM
30
31 #if HAVE_LOONGSON3
32
33 #define MULH MULH
MULH(int a,int b)34 static inline av_const int MULH(int a, int b)
35 {
36 int c;
37 __asm__ ("dmult %1, %2 \n\t"
38 "mflo %0 \n\t"
39 "dsrl %0, %0, 32 \n\t"
40 : "=r"(c)
41 : "r"(a),"r"(b)
42 : "hi", "lo");
43 return c;
44 }
45
46 #define mid_pred mid_pred
mid_pred(int a,int b,int c)47 static inline av_const int mid_pred(int a, int b, int c)
48 {
49 int t = b;
50 __asm__ ("sgt $8, %1, %2 \n\t"
51 "movn %0, %1, $8 \n\t"
52 "movn %1, %2, $8 \n\t"
53 "sgt $8, %1, %3 \n\t"
54 "movz %1, %3, $8 \n\t"
55 "sgt $8, %0, %1 \n\t"
56 "movn %0, %1, $8 \n\t"
57 : "+&r"(t),"+&r"(a)
58 : "r"(b),"r"(c)
59 : "$8");
60 return t;
61 }
62
63 #endif /* HAVE_LOONGSON3 */
64
65 #endif /* HAVE_INLINE_ASM */
66
67 #endif /* AVCODEC_MIPS_MATHOPS_H */
68