/* * 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; }