2 * This file is part of FFmpeg.
4 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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"
32 #if HAVE_MIPSFPU && HAVE_INLINE_ASM
33 #include "libavutil/mips/libm_mips.h"
34 #endif /* HAVE_MIPSFPU && HAVE_INLINE_ASM*/
38 #define atanf(x) ((float)atan(x))
43 #define atan2f(y, x) ((float)atan2(y, x))
48 #define powf(x, y) ((float)pow(x, y))
52 static av_always_inline double cbrt(double x)
54 return x < 0 ? -pow(-x, 1.0 / 3.0) : pow(x, 1.0 / 3.0);
59 static av_always_inline float cbrtf(float x)
61 return x < 0 ? -powf(-x, 1.0 / 3.0) : powf(x, 1.0 / 3.0);
67 #define cosf(x) ((float)cos(x))
72 #define expf(x) ((float)exp(x))
77 #define exp2(x) exp((x) * 0.693147180559945)
78 #endif /* HAVE_EXP2 */
82 #define exp2f(x) ((float)exp2(x))
83 #endif /* HAVE_EXP2F */
87 static av_always_inline av_const float fminf(float x, float y)
89 //Note, the NaN special case is needed for C spec compliance, it should be
90 //optimized away if the users compiler is configured to assume no NaN
91 return x > y ? y : (x == x ? x : y);
96 static av_always_inline av_const int isinf(float x)
98 uint32_t v = av_float2int(x);
99 if ((v & 0x7f800000) != 0x7f800000)
101 return !(v & 0x007fffff);
103 #endif /* HAVE_ISINF */
106 static av_always_inline av_const int isnan(float x)
108 uint32_t v = av_float2int(x);
109 if ((v & 0x7f800000) != 0x7f800000)
111 return v & 0x007fffff;
113 #endif /* HAVE_ISNAN */
117 #define ldexpf(x, exp) ((float)ldexp(x, exp))
122 #define llrint(x) ((long long)rint(x))
123 #endif /* HAVE_LLRINT */
127 #define llrintf(x) ((long long)rint(x))
128 #endif /* HAVE_LLRINT */
132 #define log2(x) (log(x) * 1.44269504088896340736)
133 #endif /* HAVE_LOG2 */
137 #define log2f(x) ((float)log2(x))
138 #endif /* HAVE_LOG2F */
142 #define log10f(x) ((float)log10(x))
147 #define sinf(x) ((float)sin(x))
151 static inline double rint(double x)
153 return x >= 0 ? floor(x + 0.5) : ceil(x - 0.5);
155 #endif /* HAVE_RINT */
158 static av_always_inline av_const long int lrint(double x)
162 #endif /* HAVE_LRINT */
165 static av_always_inline av_const long int lrintf(float x)
167 return (int)(rint(x));
169 #endif /* HAVE_LRINTF */
172 static av_always_inline av_const double round(double x)
174 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
176 #endif /* HAVE_ROUND */
179 static av_always_inline av_const float roundf(float x)
181 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
183 #endif /* HAVE_ROUNDF */
186 static av_always_inline av_const double trunc(double x)
188 return (x > 0) ? floor(x) : ceil(x);
190 #endif /* HAVE_TRUNC */
193 static av_always_inline av_const float truncf(float x)
195 return (x > 0) ? floor(x) : ceil(x);
197 #endif /* HAVE_TRUNCF */
199 #endif /* AVUTIL_LIBM_H */