227 lines
6.8 KiB
C
227 lines
6.8 KiB
C
/* $NetBSD: ldexp.c,v 1.2 2002/02/21 07:38:17 itojun Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <math.h>
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#include <stdio.h>
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int
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main()
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{
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double v;
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int e;
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#define FORMAT "%23.23lg\n"
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printf("basics:\n");
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v = 1.0; e = 5;
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printf(FORMAT, ldexp(v, e));
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v = 1.0; e = 1022;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, 1023); e = -1;
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printf(FORMAT, ldexp(v, e));
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v = 1.0; e = 1023;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, 1022); e = 1;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1022); e = 2045;
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printf(FORMAT, ldexp(v, e));
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v = 1.0; e = -5;
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printf(FORMAT, ldexp(v, e));
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v = 1.0; e = -1021;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1022); e = 1;
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printf(FORMAT, ldexp(v, e));
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v = 1.0; e = -1022;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1021); e = -1;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, 1023); e = -2045;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, 1023); e = -1023;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1022); e = 1022;
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printf(FORMAT, ldexp(v, e));
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printf("\n");
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printf("zero:\n");
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v = 0.0; e = -1;
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printf(FORMAT, ldexp(v, e));
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v = 0.0; e = 0;
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printf(FORMAT, ldexp(v, e));
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v = 0.0; e = 1;
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printf(FORMAT, ldexp(v, e));
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v = 0.0; e = 1024;
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printf(FORMAT, ldexp(v, e));
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v = 0.0; e = 1025;
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printf(FORMAT, ldexp(v, e));
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v = 0.0; e = -1023;
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printf(FORMAT, ldexp(v, e));
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v = 0.0; e = -1024;
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printf(FORMAT, ldexp(v, e));
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printf("\n");
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printf("infinity:\n");
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v = ldexp(1.0, 1024); e = -1;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, 1024); e = 0;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, 1024); e = 1;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(-1.0, 1024); e = -1;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(-1.0, 1024); e = 0;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(-1.0, 1024); e = 1;
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printf(FORMAT, ldexp(v, e));
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printf("\n");
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printf("overflow:\n");
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v = 1.0; e = 1024;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, 1023); e = 1;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1022); e = 2046;
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printf(FORMAT, ldexp(v, e));
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v = 1.0; e = 1025;
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printf(FORMAT, ldexp(v, e));
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v = -1.0; e = 1024;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(-1.0, 1023); e = 1;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(-1.0, -1022); e = 2046;
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printf(FORMAT, ldexp(v, e));
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v = -1.0; e = 1025;
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printf(FORMAT, ldexp(v, e));
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printf("\n");
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printf("denormal:\n");
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v = 1.0; e = -1023;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1022); e = -1;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, 1023); e = -2046;
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printf(FORMAT, ldexp(v, e));
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v = 1.0; e = -1024;
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printf(FORMAT, ldexp(v, e));
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v = 1.0; e = -1074;
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printf(FORMAT, ldexp(v, e));
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v = -1.0; e = -1023;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(-1.0, -1022); e = -1;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(-1.0, 1023); e = -2046;
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printf(FORMAT, ldexp(v, e));
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v = -1.0; e = -1024;
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printf(FORMAT, ldexp(v, e));
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v = -1.0; e = -1074;
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printf(FORMAT, ldexp(v, e));
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printf("\n");
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printf("underflow:\n");
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v = 1.0; e = -1075;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1074); e = -1;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, 1023); e = -2098;
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printf(FORMAT, ldexp(v, e));
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v = 1.0; e = -1076;
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printf(FORMAT, ldexp(v, e));
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v = -1.0; e = -1075;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(-1.0, -1074); e = -1;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(-1.0, 1023); e = -2098;
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printf(FORMAT, ldexp(v, e));
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v = -1.0; e = -1076;
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printf(FORMAT, ldexp(v, e));
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printf("\n");
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printf("denormal, large exponent:\n");
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v = ldexp(1.0, -1028); e = 1024;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1025;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1026;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1027;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1028;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1029;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1030;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1040;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1050;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1060;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1100;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1200;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1300;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1400;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1500;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1600;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1700;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1800;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 1900;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 2000;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 2046;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 2047;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 2048;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 2049;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 2050;
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printf(FORMAT, ldexp(v, e));
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v = ldexp(1.0, -1028); e = 2051;
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printf(FORMAT, ldexp(v, e));
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exit(0);
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}
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