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/*
* Some debug functions
*
* MIPS floating point support
*
* Copyright (C) 1994-2000 Algorithmics Ltd.
*
* 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/types.h>
#include <linux/printk.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)
union ieee754dp ieee754dp_dump(char *m, union 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;
}
union ieee754sp ieee754sp_dump(char *m, union 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;
}
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