s_ldexpf.c (887B)
1 /* s_ldexpf.c -- float version of s_ldexp.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 #ifndef lint 17 static char rcsid[] = "$FreeBSD: src/lib/msun/src/s_ldexpf.c,v 1.7 2002/05/28 18:15:04 alfred Exp $"; 18 #endif 19 20 #include "math.h" 21 #include "math_private.h" 22 #include <errno.h> 23 24 float 25 ldexpf(float value, int exp) 26 { 27 if(!finitef(value)||value==(float)0.0) return value; 28 value = scalbnf(value,exp); 29 if(!finitef(value)||value==(float)0.0) errno = ERANGE; 30 return value; 31 }