diff options
Diffstat (limited to 'arch/mips/math-emu/ieee754d.c')
| -rw-r--r-- | arch/mips/math-emu/ieee754d.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/arch/mips/math-emu/ieee754d.c b/arch/mips/math-emu/ieee754d.c new file mode 100644 index 000000000000..7e900f30987e --- /dev/null +++ b/arch/mips/math-emu/ieee754d.c | |||
| @@ -0,0 +1,138 @@ | |||
| 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 | |||