1/*
2 * Simple math operations
3 * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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_AVR32_MATHOPS_H
23#define AVCODEC_AVR32_MATHOPS_H
24
25#include <stdint.h>
26#include "config.h"
27#include "libavutil/common.h"
28
29#if HAVE_INLINE_ASM
30
31#define MULL MULL
32static inline av_const int MULL(int a, int b, unsigned shift)
33{
34    union { int64_t x; int hl[2]; } x;
35    __asm__ ("muls.d %0, %1, %2       \n\t"
36             "lsr    %0, %3           \n\t"
37             "or     %0, %0, %m0<<%4  \n\t"
38             : "=r"(x) : "r"(b), "r"(a), "i"(shift), "i"(32-shift));
39    return x.hl[1];
40}
41
42#define MULH MULH
43static inline av_const int MULH(int a, int b)
44{
45    union { int64_t x; int hl[2]; } x;
46    __asm__ ("muls.d %0, %1, %2" : "=r"(x.x) : "r"(a), "r"(b));
47    return x.hl[0];
48}
49
50#define MUL64 MUL64
51static inline av_const int64_t MUL64(int a, int b)
52{
53    int64_t x;
54    __asm__ ("muls.d %0, %1, %2" : "=r"(x) : "r"(a), "r"(b));
55    return x;
56}
57
58static inline av_const int64_t MAC64(int64_t d, int a, int b)
59{
60    __asm__ ("macs.d %0, %1, %2" : "+r"(d) : "r"(a), "r"(b));
61    return d;
62}
63#define MAC64(d, a, b) ((d) = MAC64(d, a, b))
64#define MLS64(d, a, b) MAC64(d, -(a), b)
65
66static inline av_const int MAC16(int d, int a, int b)
67{
68    __asm__ ("machh.w %0, %1:b, %2:b" : "+r"(d) : "r"(a), "r"(b));
69    return d;
70}
71#define MAC16(d, a, b) ((d) = MAC16(d, a, b))
72#define MLS16(d, a, b) MAC16(d, -(a), b)
73
74#define MUL16 MUL16
75static inline av_const int MUL16(int a, int b)
76{
77    int d;
78    __asm__ ("mulhh.w %0, %1:b, %2:b" : "=r"(d) : "r"(a), "r"(b));
79    return d;
80}
81
82#define mid_pred mid_pred
83static inline av_const int mid_pred(int a, int b, int c)
84{
85    int m;
86    __asm__ ("mov   %0, %2  \n\t"
87             "cp.w  %1, %2  \n\t"
88             "movgt %0, %1  \n\t"
89             "movgt %1, %2  \n\t"
90             "cp.w  %1, %3  \n\t"
91             "movle %1, %3  \n\t"
92             "cp.w  %0, %1  \n\t"
93             "movgt %0, %1  \n\t"
94             : "=&r"(m), "+r"(a)
95             : "r"(b), "r"(c));
96    return m;
97}
98
99#endif /* HAVE_INLINE_ASM */
100
101#endif /* AVCODEC_AVR32_MATHOPS_H */
102