ldexp_881.c revision 1.1.10.2
1 1.1.10.2 tls /* $NetBSD: ldexp_881.c,v 1.1.10.2 2014/08/20 00:02:10 tls Exp $ */ 2 1.1.10.2 tls 3 1.1.10.2 tls /*- 4 1.1.10.2 tls * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 1.1.10.2 tls * All rights reserved. 6 1.1.10.2 tls * 7 1.1.10.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.1.10.2 tls * by Charles M. Hannum. 9 1.1.10.2 tls * 10 1.1.10.2 tls * Redistribution and use in source and binary forms, with or without 11 1.1.10.2 tls * modification, are permitted provided that the following conditions 12 1.1.10.2 tls * are met: 13 1.1.10.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.1.10.2 tls * notice, this list of conditions and the following disclaimer. 15 1.1.10.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.10.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.1.10.2 tls * documentation and/or other materials provided with the distribution. 18 1.1.10.2 tls * 19 1.1.10.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.10.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.10.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.10.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.10.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.10.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.10.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.10.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.10.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.10.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.10.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.1.10.2 tls */ 31 1.1.10.2 tls 32 1.1.10.2 tls #include <sys/cdefs.h> 33 1.1.10.2 tls #if defined(LIBC_SCCS) && !defined(lint) 34 1.1.10.2 tls __RCSID("$NetBSD: ldexp_881.c,v 1.1.10.2 2014/08/20 00:02:10 tls Exp $"); 35 1.1.10.2 tls #endif /* LIBC_SCCS and not lint */ 36 1.1.10.2 tls 37 1.1.10.2 tls #include <sys/types.h> 38 1.1.10.2 tls #include <machine/ieee.h> 39 1.1.10.2 tls #include <math.h> 40 1.1.10.2 tls 41 1.1.10.2 tls /* 42 1.1.10.2 tls * ldexp(value, exp): return value * (2 ** exp). 43 1.1.10.2 tls */ 44 1.1.10.2 tls double 45 1.1.10.2 tls ldexp(value, exp2) 46 1.1.10.2 tls double value; 47 1.1.10.2 tls int exp2; 48 1.1.10.2 tls { 49 1.1.10.2 tls double temp; 50 1.1.10.2 tls 51 1.1.10.2 tls __asm ("fscalel %2,%1" 52 1.1.10.2 tls : "=f" (temp) 53 1.1.10.2 tls : "0" (value), "g" (exp2)); 54 1.1.10.2 tls return (temp); 55 1.1.10.2 tls } 56
Indexes created Thu Oct 02 07:10:07 GMT 2025