1 /*
2  * This file is part of the MicroPython project, http://micropython.org/
3  *
4  * These math functions are taken from newlib-nano-2, the newlib/libm/math
5  * directory, available from https://github.com/32bitmicro/newlib-nano-2.
6  *
7  * Appropriate copyright headers are reproduced below.
8  */
9 
10 /* sf_ldexp.c -- float version of s_ldexp.c.
11  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
12  */
13 
14 /*
15  * ====================================================
16  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
17  *
18  * Developed at SunPro, a Sun Microsystems, Inc. business.
19  * Permission to use, copy, modify, and distribute this
20  * software is freely granted, provided that this notice
21  * is preserved.
22  * ====================================================
23  */
24 
25 #include "fdlibm.h"
26 
27 #ifdef __STDC__
ldexpf(float value,int exp)28 	float ldexpf(float value, int exp)
29 #else
30 	float ldexpf(value, exp)
31 	float value; int exp;
32 #endif
33 {
34 	if(!isfinite(value)||value==(float)0.0) return value;
35 	value = scalbnf(value,exp);
36 	//if(!finitef(value)||value==(float)0.0) errno = ERANGE;
37 	return value;
38 }
39 
40 #ifdef _DOUBLE_IS_32BITS
41 
42 #ifdef __STDC__
ldexp(double value,int exp)43 	double ldexp(double value, int exp)
44 #else
45 	double ldexp(value, exp)
46 	double value; int exp;
47 #endif
48 {
49 	return (double) ldexpf((float) value, exp);
50 }
51 
52 #endif /* defined(_DOUBLE_IS_32BITS) */
53