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Diffstat (limited to 'newlib/libm/machine/spu/headers/log10f.h')
-rw-r--r-- | newlib/libm/machine/spu/headers/log10f.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/newlib/libm/machine/spu/headers/log10f.h b/newlib/libm/machine/spu/headers/log10f.h new file mode 100644 index 000000000..202cb7c0d --- /dev/null +++ b/newlib/libm/machine/spu/headers/log10f.h @@ -0,0 +1,54 @@ +/* + (C) Copyright 2001,2006, + International Business Machines Corporation, + Sony Computer Entertainment, Incorporated, + Toshiba Corporation, + + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + * Neither the names of the copyright holders nor the names of their + contributors may be used to endorse or promote products derived from this + software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER + OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ +#ifndef _LOG10F_H_ +#define _LOG10F_H_ 1 + +#include "log2f.h" + +/* + * FUNCTION + * float _log10f(float x) + * + * DESCRIPTION + * _log10f computes log (base 10) of the input value x. log10 + * is computed using log2 as follows: + * + * log10f(x) = log2(x) / log2(10); + */ + +static __inline float _log10f(float x) +{ + return (_log2f(x) * 0.30102999566398f); +} + +#endif /* _LOG10F_H_ */ |