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