53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* These math functions are taken from newlib-nano-2, the newlib/libm/math
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* directory, available from https://github.com/32bitmicro/newlib-nano-2.
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*
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* Appropriate copyright headers are reproduced below.
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*/
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/* sf_ldexp.c -- float version of s_ldexp.c.
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* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#include "fdlibm.h"
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#ifdef __STDC__
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float ldexpf(float value, int exp)
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#else
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float ldexpf(value, exp)
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float value; int exp;
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#endif
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{
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if(!isfinite(value)||value==(float)0.0) return value;
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value = scalbnf(value,exp);
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//if(!finitef(value)||value==(float)0.0) errno = ERANGE;
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return value;
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}
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#ifdef _DOUBLE_IS_32BITS
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#ifdef __STDC__
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double ldexp(double value, int exp)
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#else
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double ldexp(value, exp)
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double value; int exp;
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#endif
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{
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return (double) ldexpf((float) value, exp);
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}
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#endif /* defined(_DOUBLE_IS_32BITS) */
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