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