1 /* $OpenBSD: quad_float.h,v 1.4 2000/01/11 08:18:43 mickey Exp $ */ 2 3 /* 4 * Copyright 1996 1995 by Open Software Foundation, Inc. 5 * All Rights Reserved 6 * 7 * Permission to use, copy, modify, and distribute this software and 8 * its documentation for any purpose and without fee is hereby granted, 9 * provided that the above copyright notice appears in all copies and 10 * that both the copyright notice and this permission notice appear in 11 * supporting documentation. 12 * 13 * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE 14 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 15 * FOR A PARTICULAR PURPOSE. 16 * 17 * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR 18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 19 * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, 20 * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION 21 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 22 * 23 */ 24 /* 25 * pmk1.1 26 */ 27 /* 28 * (c) Copyright 1986 HEWLETT-PACKARD COMPANY 29 * 30 * To anyone who acknowledges that this file is provided "AS IS" 31 * without any express or implied warranty: 32 * permission to use, copy, modify, and distribute this file 33 * for any purpose is hereby granted without fee, provided that 34 * the above copyright notice and this notice appears in all 35 * copies, and that the name of Hewlett-Packard Company not be 36 * used in advertising or publicity pertaining to distribution 37 * of the software without specific, written prior permission. 38 * Hewlett-Packard Company makes no representations about the 39 * suitability of this software for any purpose. 40 */ 41 42 /****************************** 43 * Quad precision functions * 44 ******************************/ 45 46 /* 32-bit word grabing functions */ 47 #define Quad_firstword(value) Qallp1(value) 48 #define Quad_secondword(value) Qallp2(value) 49 #define Quad_thirdword(value) Qallp3(value) 50 #define Quad_fourthword(value) Qallp4(value) 51 52 53 /* This magnitude comparison uses the signless first words and 54 * the regular part2 words. The comparison is graphically: 55 * 56 * 1st greater? ----------->| 57 * | 58 * 1st less?-----------------+------->| 59 * | | 60 * 2nd greater?------------->| | 61 * | | 62 * 2nd less?-----------------+------->| 63 * | | 64 * 3rd greater?------------->| | 65 * | | 66 * 3rd less?-----------------+------->| 67 * | | 68 * 4th greater or equal?---->| | 69 * | | 70 * False True 71 */ 72 #define Quad_ismagnitudeless(leftp3,leftp4,rightp1,rightp2,rightp3,rightp4,signlessleft,signlessright) \ 73 /* Quad_floating_point left, right; * \ 74 * unsigned int signlessleft, signlessright; */ \ 75 ( signlessleft<=signlessright && \ 76 (signlessleft<signlessright || (Qallp2(leftp2)<=Qallp2(rightp2) && \ 77 (Qallp2(leftp2)<Qallp2(rightp2) || (Qallp3(leftp3)<=Qallp3(rightp3) && \ 78 (Qallp3(leftp3)<Qallp3(rightp3) || Qallp4(leftp4)<Qallp4(rightp4))))))) 79 80 #define Quad_xor_to_intp1(leftp1,rightp1,result) \ 81 /* quad_floating_point left, right; \ 82 * unsigned int result; */ \ 83 result = Qallp1(leftp1) XOR Qallp1(rightp1); 84 85 #define Quad_xor_from_intp1(leftp1,rightp1,result) \ 86 /* quad_floating_point right, result; \ 87 * unsigned int left; */ \ 88 Qallp1(resultp1) = left XOR Qallp1(rightp1) 89 90 #define Quad_swap_lower(leftp1,leftp2,leftp3,leftp4,rightp1,rightp2,rightp3,rightp4) \ 91 /* quad_floating_point left, right; */ \ 92 Qallp2(leftp2) = Qallp2(leftp2) XOR Qallp2(rightp2) \ 93 Qallp2(rightp2) = Qallp2(leftp2) XOR Qallp2(rightp2) \ 94 Qallp2(leftp2) = Qallp2(leftp2) XOR Qallp2(rightp2) \ 95 Qallp3(leftp3) = Qallp3(leftp3) XOR Qallp3(rightp3) \ 96 Qallp3(rightp3) = Qallp3(leftp3) XOR Qallp3(rightp3) \ 97 Qallp3(leftp3) = Qallp3(leftp3) XOR Qallp3(rightp3) \ 98 Qallp4(leftp4) = Qallp4(leftp4) XOR Qallp4(rightp4) \ 99 Qallp4(rightp4) = Qallp4(leftp4) XOR Qallp4(rightp4) \ 100 Qallp4(leftp4) = Qallp4(leftp4) XOR Qallp4(rightp4) 101 102 int quad_frnd __P((quad_floating_point *, quad_floating_point *, unsigned int *)); 103