2 * This file is part of Libav.
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 * Replacements for frequently missing libm functions
29 #include "attributes.h"
34 #define atanf(x) ((float)atan(x))
39 #define atan2f(y, x) ((float)atan2(y, x))
44 #define powf(x, y) ((float)pow(x, y))
48 static av_always_inline float cbrtf(float x)
50 return x < 0 ? -powf(-x, 1.0 / 3.0) : powf(x, 1.0 / 3.0);
56 #define cosf(x) ((float)cos(x))
61 #define expf(x) ((float)exp(x))
66 #define exp2(x) exp((x) * 0.693147180559945)
67 #endif /* HAVE_EXP2 */
71 #define exp2f(x) ((float)exp2(x))
72 #endif /* HAVE_EXP2F */
75 static av_always_inline av_const int isinf(float x)
77 uint32_t v = av_float2int(x);
78 if ((v & 0x7f800000) != 0x7f800000)
80 return !(v & 0x007fffff);
82 #endif /* HAVE_ISINF */
85 static av_always_inline av_const int isnan(float x)
87 uint32_t v = av_float2int(x);
88 if ((v & 0x7f800000) != 0x7f800000)
90 return v & 0x007fffff;
92 #endif /* HAVE_ISNAN */
96 #define ldexpf(x, exp) ((float)ldexp(x, exp))
101 #define llrint(x) ((long long)rint(x))
102 #endif /* HAVE_LLRINT */
106 #define llrintf(x) ((long long)rint(x))
107 #endif /* HAVE_LLRINT */
111 #define log2(x) (log(x) * 1.44269504088896340736)
112 #endif /* HAVE_LOG2 */
116 #define log2f(x) ((float)log2(x))
117 #endif /* HAVE_LOG2F */
121 #define log10f(x) ((float)log10(x))
126 #define sinf(x) ((float)sin(x))
130 static inline double rint(double x)
132 return x >= 0 ? floor(x + 0.5) : ceil(x - 0.5);
134 #endif /* HAVE_RINT */
137 static av_always_inline av_const long int lrint(double x)
141 #endif /* HAVE_LRINT */
144 static av_always_inline av_const long int lrintf(float x)
146 return (int)(rint(x));
148 #endif /* HAVE_LRINTF */
151 static av_always_inline av_const double round(double x)
153 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
155 #endif /* HAVE_ROUND */
158 static av_always_inline av_const float roundf(float x)
160 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
162 #endif /* HAVE_ROUNDF */
165 static av_always_inline av_const double trunc(double x)
167 return (x > 0) ? floor(x) : ceil(x);
169 #endif /* HAVE_TRUNC */
172 static av_always_inline av_const float truncf(float x)
174 return (x > 0) ? floor(x) : ceil(x);
176 #endif /* HAVE_TRUNCF */
178 #endif /* AVUTIL_LIBM_H */