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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 @@ +/* + * Some debug functions + * + * MIPS floating point support + * + * Copyright (C) 1994-2000 Algorithmics Ltd. + * http://www.algor.co.uk + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Nov 7, 2000 + * Modified to build and operate in Linux kernel environment. + * + * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com + * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved. + */ + +#include <linux/kernel.h> +#include "ieee754.h" + +#define DP_EBIAS 1023 +#define DP_EMIN (-1022) +#define DP_EMAX 1023 +#define DP_FBITS 52 + +#define SP_EBIAS 127 +#define SP_EMIN (-126) +#define SP_EMAX 127 +#define SP_FBITS 23 + +#define DP_MBIT(x) ((u64)1 << (x)) +#define DP_HIDDEN_BIT DP_MBIT(DP_FBITS) +#define DP_SIGN_BIT DP_MBIT(63) + + +#define SP_MBIT(x) ((u32)1 << (x)) +#define SP_HIDDEN_BIT SP_MBIT(SP_FBITS) +#define SP_SIGN_BIT SP_MBIT(31) + + +#define SPSIGN(sp) (sp.parts.sign) +#define SPBEXP(sp) (sp.parts.bexp) +#define SPMANT(sp) (sp.parts.mant) + +#define DPSIGN(dp) (dp.parts.sign) +#define DPBEXP(dp) (dp.parts.bexp) +#define DPMANT(dp) (dp.parts.mant) + +ieee754dp ieee754dp_dump(char *m, ieee754dp x) +{ + int i; + + printk("%s", m); + printk("<%08x,%08x>\n", (unsigned) (x.bits >> 32), + (unsigned) x.bits); + printk("\t="); + switch (ieee754dp_class(x)) { + case IEEE754_CLASS_QNAN: + case IEEE754_CLASS_SNAN: + printk("Nan %c", DPSIGN(x) ? '-' : '+'); + for (i = DP_FBITS - 1; i >= 0; i--) + printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0'); + break; + case IEEE754_CLASS_INF: + printk("%cInfinity", DPSIGN(x) ? '-' : '+'); + break; + case IEEE754_CLASS_ZERO: + printk("%cZero", DPSIGN(x) ? '-' : '+'); + break; + case IEEE754_CLASS_DNORM: + printk("%c0.", DPSIGN(x) ? '-' : '+'); + for (i = DP_FBITS - 1; i >= 0; i--) + printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0'); + printk("e%d", DPBEXP(x) - DP_EBIAS); + break; + case IEEE754_CLASS_NORM: + printk("%c1.", DPSIGN(x) ? '-' : '+'); + for (i = DP_FBITS - 1; i >= 0; i--) + printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0'); + printk("e%d", DPBEXP(x) - DP_EBIAS); + break; + default: + printk("Illegal/Unknown IEEE754 value class"); + } + printk("\n"); + return x; +} + +ieee754sp ieee754sp_dump(char *m, ieee754sp x) +{ + int i; + + printk("%s=", m); + printk("<%08x>\n", (unsigned) x.bits); + printk("\t="); + switch (ieee754sp_class(x)) { + case IEEE754_CLASS_QNAN: + case IEEE754_CLASS_SNAN: + printk("Nan %c", SPSIGN(x) ? '-' : '+'); + for (i = SP_FBITS - 1; i >= 0; i--) + printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0'); + break; + case IEEE754_CLASS_INF: + printk("%cInfinity", SPSIGN(x) ? '-' : '+'); + break; + case IEEE754_CLASS_ZERO: + printk("%cZero", SPSIGN(x) ? '-' : '+'); + break; + case IEEE754_CLASS_DNORM: + printk("%c0.", SPSIGN(x) ? '-' : '+'); + for (i = SP_FBITS - 1; i >= 0; i--) + printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0'); + printk("e%d", SPBEXP(x) - SP_EBIAS); + break; + case IEEE754_CLASS_NORM: + printk("%c1.", SPSIGN(x) ? '-' : '+'); + for (i = SP_FBITS - 1; i >= 0; i--) + printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0'); + printk("e%d", SPBEXP(x) - SP_EBIAS); + break; + default: + printk("Illegal/Unknown IEEE754 value class"); + } + printk("\n"); + return x; +} + |