| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* @(#)s_signif.c 5.1 93/09/24 */ |
| 2 | /* |
| 3 | * ==================================================== |
| 4 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
| 5 | * |
| 6 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
| 7 | * Permission to use, copy, modify, and distribute this |
| 8 | * software is freely granted, provided that this notice |
| 9 | * is preserved. |
| 10 | * ==================================================== |
| 11 | */ |
| 12 | |
| 13 | #if defined(LIBM_SCCS) && !defined(lint) |
| 14 | static char rcsid[] = "$NetBSD: s_significand.c,v 1.6 1995/05/10 20:48:11 jtc Exp $"; |
| 15 | #endif |
| 16 | |
| 17 | /* |
| 18 | * significand(x) computes just |
| 19 | * scalb(x, (double) -ilogb(x)), |
| 20 | * for exercising the fraction-part(F) IEEE 754-1985 test vector. |
| 21 | */ |
| 22 | |
| 23 | #include <math.h> |
| 24 | #include <math_private.h> |
| 25 | |
| 26 | double __significand(double x) |
| 27 | { |
| 28 | return __ieee754_scalb(x,(double) -__ilogb(x)); |
| 29 | } |
| 30 | weak_alias (__significand, significand) |
| 31 | #ifdef NO_LONG_DOUBLE |
| 32 | strong_alias (__significand, __significandl) |
| 33 | weak_alias (__significand, significandl) |
| 34 | #endif |