132 lines
2.9 KiB
C
132 lines
2.9 KiB
C
/*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Replacements for frequently missing libm functions
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*/
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#ifndef AVUTIL_LIBM_H
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#define AVUTIL_LIBM_H
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#include <math.h>
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#include "config.h"
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#include "attributes.h"
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#include "intfloat.h"
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#if !HAVE_CBRTF
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static av_always_inline float cbrtf(float x)
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{
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return x < 0 ? -powf(-x, 1.0 / 3.0) : powf(x, 1.0 / 3.0);
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}
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#endif
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#if !HAVE_EXP2
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#undef exp2
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#define exp2(x) exp((x) * 0.693147180559945)
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#endif /* HAVE_EXP2 */
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#if !HAVE_EXP2F
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#undef exp2f
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#define exp2f(x) ((float)exp2(x))
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#endif /* HAVE_EXP2F */
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#if !HAVE_ISINF
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static av_always_inline av_const int isinf(float x)
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{
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uint32_t v = av_float2int(x);
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if ((v & 0x7f800000) != 0x7f800000)
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return 0;
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return !(v & 0x007fffff);
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}
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#endif /* HAVE_ISINF */
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#if !HAVE_ISNAN
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static av_always_inline av_const int isnan(float x)
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{
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uint32_t v = av_float2int(x);
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if ((v & 0x7f800000) != 0x7f800000)
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return 0;
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return v & 0x007fffff;
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}
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#endif /* HAVE_ISNAN */
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#if !HAVE_LLRINT
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#undef llrint
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#define llrint(x) ((long long)rint(x))
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#endif /* HAVE_LLRINT */
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#if !HAVE_LLRINTF
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#undef llrintf
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#define llrintf(x) ((long long)rint(x))
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#endif /* HAVE_LLRINT */
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#if !HAVE_LOG2
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#undef log2
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#define log2(x) (log(x) * 1.44269504088896340736)
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#endif /* HAVE_LOG2 */
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#if !HAVE_LOG2F
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#undef log2f
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#define log2f(x) ((float)log2(x))
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#endif /* HAVE_LOG2F */
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#if !HAVE_LRINT
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static av_always_inline av_const long int lrint(double x)
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{
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return rint(x);
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}
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#endif /* HAVE_LRINT */
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#if !HAVE_LRINTF
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static av_always_inline av_const long int lrintf(float x)
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{
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return (int)(rint(x));
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}
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#endif /* HAVE_LRINTF */
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#if !HAVE_ROUND
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static av_always_inline av_const double round(double x)
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{
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return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
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}
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#endif /* HAVE_ROUND */
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#if !HAVE_ROUNDF
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static av_always_inline av_const float roundf(float x)
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{
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return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
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}
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#endif /* HAVE_ROUNDF */
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#if !HAVE_TRUNC
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static av_always_inline av_const double trunc(double x)
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{
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return (x > 0) ? floor(x) : ceil(x);
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}
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#endif /* HAVE_TRUNC */
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#if !HAVE_TRUNCF
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static av_always_inline av_const float truncf(float x)
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{
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return (x > 0) ? floor(x) : ceil(x);
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}
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#endif /* HAVE_TRUNCF */
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#endif /* AVUTIL_LIBM_H */
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