1/* w_scalbf.c -- float version of w_scalb.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 */
4
5/*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8 *
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
12 * is preserved.
13 * ====================================================
14 */
15
16#if defined(LIBM_SCCS) && !defined(lint)
17static char rcsid[] = "$NetBSD: w_scalbf.c,v 1.3 1995/05/10 20:49:50 jtc Exp $";
18#endif
19
20/*
21 * wrapper scalbf(float x, float fn) is provide for
22 * passing various standard test suite. One
23 * should use scalbn() instead.
24 */
25
26#include "math.h"
27#include "math_private.h"
28
29#include <errno.h>
30
31#ifdef __STDC__
32#ifdef _SCALB_INT
33	float __scalbf(float x, int fn)		/* wrapper scalbf */
34#else
35	float __scalbf(float x, float fn)		/* wrapper scalbf */
36#endif
37#else
38	float __scalbf(x,fn)			/* wrapper scalbf */
39#ifdef _SCALB_INT
40	float x; int fn;
41#else
42	float x,fn;
43#endif
44#endif
45{
46#ifdef _IEEE_LIBM
47	return __ieee754_scalbf(x,fn);
48#else
49	float z;
50	z = __ieee754_scalbf(x,fn);
51	if(_LIB_VERSION != _SVID_) return z;
52	if(!(__finitef(z)||__isnanf(z))&&__finitef(x)) {
53	    /* scalbf overflow */
54	    return (float)__kernel_standard((double)x,(double)fn,132);
55	}
56	if(z==(float)0.0&&z!=x) {
57	    /* scalbf underflow */
58	    return (float)__kernel_standard((double)x,(double)fn,133);
59	}
60#ifndef _SCALB_INT
61	if(!__finitef(fn)) __set_errno (ERANGE);
62#endif
63	return z;
64#endif
65}
66weak_alias (__scalbf, scalbf)
67