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