1 /* ieee754 floating point arithmetic 2 * single and double precision 3 * 4 * BUGS 5 * not much dp done 6 * doesn't generate IEEE754_INEXACT 7 * 8 */ 9 /* 10 * MIPS floating point support 11 * Copyright (C) 1994-2000 Algorithmics Ltd. 12 * 13 * This program is free software; you can distribute it and/or modify it 14 * under the terms of the GNU General Public License (Version 2) as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope it will be useful, but WITHOUT 18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 20 * for more details. 21 * 22 * You should have received a copy of the GNU General Public License along 23 * with this program; if not, write to the Free Software Foundation, Inc., 24 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 25 */ 26 27 #include <linux/compiler.h> 28 29 #include "ieee754.h" 30 #include "ieee754sp.h" 31 #include "ieee754dp.h" 32 33 /* 34 * Special constants 35 */ 36 37 /* 38 * Older GCC requires the inner braces for initialization of union ieee754dp's 39 * anonymous struct member. Without an error will result. 40 */ 41 #define xPCNST(s, b, m, ebias) \ 42 { \ 43 { \ 44 .sign = (s), \ 45 .bexp = (b) + ebias, \ 46 .mant = (m) \ 47 } \ 48 } 49 50 #define DPCNST(s, b, m) \ 51 xPCNST(s, b, m, DP_EBIAS) 52 53 const union ieee754dp __ieee754dp_spcvals[] = { 54 DPCNST(0, DP_EMIN - 1, 0x0000000000000ULL), /* + zero */ 55 DPCNST(1, DP_EMIN - 1, 0x0000000000000ULL), /* - zero */ 56 DPCNST(0, 0, 0x0000000000000ULL), /* + 1.0 */ 57 DPCNST(1, 0, 0x0000000000000ULL), /* - 1.0 */ 58 DPCNST(0, 3, 0x4000000000000ULL), /* + 10.0 */ 59 DPCNST(1, 3, 0x4000000000000ULL), /* - 10.0 */ 60 DPCNST(0, DP_EMAX + 1, 0x0000000000000ULL), /* + infinity */ 61 DPCNST(1, DP_EMAX + 1, 0x0000000000000ULL), /* - infinity */ 62 DPCNST(0, DP_EMAX + 1, 0x7FFFFFFFFFFFFULL), /* + indef quiet Nan */ 63 DPCNST(0, DP_EMAX, 0xFFFFFFFFFFFFFULL), /* + max */ 64 DPCNST(1, DP_EMAX, 0xFFFFFFFFFFFFFULL), /* - max */ 65 DPCNST(0, DP_EMIN, 0x0000000000000ULL), /* + min normal */ 66 DPCNST(1, DP_EMIN, 0x0000000000000ULL), /* - min normal */ 67 DPCNST(0, DP_EMIN - 1, 0x0000000000001ULL), /* + min denormal */ 68 DPCNST(1, DP_EMIN - 1, 0x0000000000001ULL), /* - min denormal */ 69 DPCNST(0, 31, 0x0000000000000ULL), /* + 1.0e31 */ 70 DPCNST(0, 63, 0x0000000000000ULL), /* + 1.0e63 */ 71 }; 72 73 #define SPCNST(s, b, m) \ 74 xPCNST(s, b, m, SP_EBIAS) 75 76 const union ieee754sp __ieee754sp_spcvals[] = { 77 SPCNST(0, SP_EMIN - 1, 0x000000), /* + zero */ 78 SPCNST(1, SP_EMIN - 1, 0x000000), /* - zero */ 79 SPCNST(0, 0, 0x000000), /* + 1.0 */ 80 SPCNST(1, 0, 0x000000), /* - 1.0 */ 81 SPCNST(0, 3, 0x200000), /* + 10.0 */ 82 SPCNST(1, 3, 0x200000), /* - 10.0 */ 83 SPCNST(0, SP_EMAX + 1, 0x000000), /* + infinity */ 84 SPCNST(1, SP_EMAX + 1, 0x000000), /* - infinity */ 85 SPCNST(0, SP_EMAX + 1, 0x3FFFFF), /* + indef quiet Nan */ 86 SPCNST(0, SP_EMAX, 0x7FFFFF), /* + max normal */ 87 SPCNST(1, SP_EMAX, 0x7FFFFF), /* - max normal */ 88 SPCNST(0, SP_EMIN, 0x000000), /* + min normal */ 89 SPCNST(1, SP_EMIN, 0x000000), /* - min normal */ 90 SPCNST(0, SP_EMIN - 1, 0x000001), /* + min denormal */ 91 SPCNST(1, SP_EMIN - 1, 0x000001), /* - min denormal */ 92 SPCNST(0, 31, 0x000000), /* + 1.0e31 */ 93 SPCNST(0, 63, 0x000000), /* + 1.0e63 */ 94 }; 95