1 /* 2 * Some debug functions 3 * 4 * MIPS floating point support 5 * 6 * Copyright (C) 1994-2000 Algorithmics Ltd. 7 * http://www.algor.co.uk 8 * 9 * This program is free software; you can distribute it and/or modify it 10 * under the terms of the GNU General Public License (Version 2) as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope it will be useful, but WITHOUT 14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 * for more details. 17 * 18 * You should have received a copy of the GNU General Public License along 19 * with this program; if not, write to the Free Software Foundation, Inc., 20 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. 21 * 22 * Nov 7, 2000 23 * Modified to build and operate in Linux kernel environment. 24 * 25 * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com 26 * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved. 27 */ 28 29 #include <linux/kernel.h> 30 #include "ieee754.h" 31 32 #define DP_EBIAS 1023 33 #define DP_EMIN (-1022) 34 #define DP_EMAX 1023 35 #define DP_FBITS 52 36 37 #define SP_EBIAS 127 38 #define SP_EMIN (-126) 39 #define SP_EMAX 127 40 #define SP_FBITS 23 41 42 #define DP_MBIT(x) ((u64)1 << (x)) 43 #define DP_HIDDEN_BIT DP_MBIT(DP_FBITS) 44 #define DP_SIGN_BIT DP_MBIT(63) 45 46 47 #define SP_MBIT(x) ((u32)1 << (x)) 48 #define SP_HIDDEN_BIT SP_MBIT(SP_FBITS) 49 #define SP_SIGN_BIT SP_MBIT(31) 50 51 52 #define SPSIGN(sp) (sp.parts.sign) 53 #define SPBEXP(sp) (sp.parts.bexp) 54 #define SPMANT(sp) (sp.parts.mant) 55 56 #define DPSIGN(dp) (dp.parts.sign) 57 #define DPBEXP(dp) (dp.parts.bexp) 58 #define DPMANT(dp) (dp.parts.mant) 59 60 ieee754dp ieee754dp_dump(char *m, ieee754dp x) 61 { 62 int i; 63 64 printk("%s", m); 65 printk("<%08x,%08x>\n", (unsigned) (x.bits >> 32), 66 (unsigned) x.bits); 67 printk("\t="); 68 switch (ieee754dp_class(x)) { 69 case IEEE754_CLASS_QNAN: 70 case IEEE754_CLASS_SNAN: 71 printk("Nan %c", DPSIGN(x) ? '-' : '+'); 72 for (i = DP_FBITS - 1; i >= 0; i--) 73 printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0'); 74 break; 75 case IEEE754_CLASS_INF: 76 printk("%cInfinity", DPSIGN(x) ? '-' : '+'); 77 break; 78 case IEEE754_CLASS_ZERO: 79 printk("%cZero", DPSIGN(x) ? '-' : '+'); 80 break; 81 case IEEE754_CLASS_DNORM: 82 printk("%c0.", DPSIGN(x) ? '-' : '+'); 83 for (i = DP_FBITS - 1; i >= 0; i--) 84 printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0'); 85 printk("e%d", DPBEXP(x) - DP_EBIAS); 86 break; 87 case IEEE754_CLASS_NORM: 88 printk("%c1.", DPSIGN(x) ? '-' : '+'); 89 for (i = DP_FBITS - 1; i >= 0; i--) 90 printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0'); 91 printk("e%d", DPBEXP(x) - DP_EBIAS); 92 break; 93 default: 94 printk("Illegal/Unknown IEEE754 value class"); 95 } 96 printk("\n"); 97 return x; 98 } 99 100 ieee754sp ieee754sp_dump(char *m, ieee754sp x) 101 { 102 int i; 103 104 printk("%s=", m); 105 printk("<%08x>\n", (unsigned) x.bits); 106 printk("\t="); 107 switch (ieee754sp_class(x)) { 108 case IEEE754_CLASS_QNAN: 109 case IEEE754_CLASS_SNAN: 110 printk("Nan %c", SPSIGN(x) ? '-' : '+'); 111 for (i = SP_FBITS - 1; i >= 0; i--) 112 printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0'); 113 break; 114 case IEEE754_CLASS_INF: 115 printk("%cInfinity", SPSIGN(x) ? '-' : '+'); 116 break; 117 case IEEE754_CLASS_ZERO: 118 printk("%cZero", SPSIGN(x) ? '-' : '+'); 119 break; 120 case IEEE754_CLASS_DNORM: 121 printk("%c0.", SPSIGN(x) ? '-' : '+'); 122 for (i = SP_FBITS - 1; i >= 0; i--) 123 printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0'); 124 printk("e%d", SPBEXP(x) - SP_EBIAS); 125 break; 126 case IEEE754_CLASS_NORM: 127 printk("%c1.", SPSIGN(x) ? '-' : '+'); 128 for (i = SP_FBITS - 1; i >= 0; i--) 129 printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0'); 130 printk("e%d", SPBEXP(x) - SP_EBIAS); 131 break; 132 default: 133 printk("Illegal/Unknown IEEE754 value class"); 134 } 135 printk("\n"); 136 return x; 137 } 138