cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

ieee754d.c (2612B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Some debug functions
      4 *
      5 * MIPS floating point support
      6 *
      7 * Copyright (C) 1994-2000 Algorithmics Ltd.
      8 *
      9 *  Nov 7, 2000
     10 *  Modified to build and operate in Linux kernel environment.
     11 *
     12 *  Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
     13 *  Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
     14 */
     15
     16#include <linux/types.h>
     17#include <linux/printk.h>
     18#include "ieee754.h"
     19#include "ieee754sp.h"
     20#include "ieee754dp.h"
     21
     22union ieee754dp ieee754dp_dump(char *m, union ieee754dp x)
     23{
     24	int i;
     25
     26	printk("%s", m);
     27	printk("<%08x,%08x>\n", (unsigned) (x.bits >> 32),
     28	       (unsigned) x.bits);
     29	printk("\t=");
     30	switch (ieee754dp_class(x)) {
     31	case IEEE754_CLASS_QNAN:
     32	case IEEE754_CLASS_SNAN:
     33		printk("Nan %c", DPSIGN(x) ? '-' : '+');
     34		for (i = DP_FBITS - 1; i >= 0; i--)
     35			printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0');
     36		break;
     37	case IEEE754_CLASS_INF:
     38		printk("%cInfinity", DPSIGN(x) ? '-' : '+');
     39		break;
     40	case IEEE754_CLASS_ZERO:
     41		printk("%cZero", DPSIGN(x) ? '-' : '+');
     42		break;
     43	case IEEE754_CLASS_DNORM:
     44		printk("%c0.", DPSIGN(x) ? '-' : '+');
     45		for (i = DP_FBITS - 1; i >= 0; i--)
     46			printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0');
     47		printk("e%d", DPBEXP(x) - DP_EBIAS);
     48		break;
     49	case IEEE754_CLASS_NORM:
     50		printk("%c1.", DPSIGN(x) ? '-' : '+');
     51		for (i = DP_FBITS - 1; i >= 0; i--)
     52			printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0');
     53		printk("e%d", DPBEXP(x) - DP_EBIAS);
     54		break;
     55	default:
     56		printk("Illegal/Unknown IEEE754 value class");
     57	}
     58	printk("\n");
     59	return x;
     60}
     61
     62union ieee754sp ieee754sp_dump(char *m, union ieee754sp x)
     63{
     64	int i;
     65
     66	printk("%s=", m);
     67	printk("<%08x>\n", (unsigned) x.bits);
     68	printk("\t=");
     69	switch (ieee754sp_class(x)) {
     70	case IEEE754_CLASS_QNAN:
     71	case IEEE754_CLASS_SNAN:
     72		printk("Nan %c", SPSIGN(x) ? '-' : '+');
     73		for (i = SP_FBITS - 1; i >= 0; i--)
     74			printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0');
     75		break;
     76	case IEEE754_CLASS_INF:
     77		printk("%cInfinity", SPSIGN(x) ? '-' : '+');
     78		break;
     79	case IEEE754_CLASS_ZERO:
     80		printk("%cZero", SPSIGN(x) ? '-' : '+');
     81		break;
     82	case IEEE754_CLASS_DNORM:
     83		printk("%c0.", SPSIGN(x) ? '-' : '+');
     84		for (i = SP_FBITS - 1; i >= 0; i--)
     85			printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0');
     86		printk("e%d", SPBEXP(x) - SP_EBIAS);
     87		break;
     88	case IEEE754_CLASS_NORM:
     89		printk("%c1.", SPSIGN(x) ? '-' : '+');
     90		for (i = SP_FBITS - 1; i >= 0; i--)
     91			printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0');
     92		printk("e%d", SPBEXP(x) - SP_EBIAS);
     93		break;
     94	default:
     95		printk("Illegal/Unknown IEEE754 value class");
     96	}
     97	printk("\n");
     98	return x;
     99}