emuspeed.c revision 1.6 
1/*	$NetBSD: emuspeed.c,v 1.6 2005/02/06 06:05:19 perry Exp $	*/
2
3/*-
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the NetBSD
18 *	Foundation, Inc. and its contributors.
19 * 4. Neither the name of The NetBSD Foundation nor the names of its
20 *    contributors may be used to endorse or promote products derived
21 *    from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 */
35
36#include <setjmp.h>
37#include <signal.h>
38#include <stdlib.h>
39#include <stdio.h>
40#include <time.h>
41#include <unistd.h>
42
43#include "speed.h"
44
45#define PRECISION 500
46
47const struct test {
48	char *name;
49	void (*func)(int);
50	char *comment;
51} testlist[] = {
52	{"Illegal", illegal, "(test: unimplemented)"},
53	{"mulsl Da,Db", mul32sreg, "(test: should be native)"},
54	{"mulsl sp@(8),Da", mul32smem, "(test: should be native)\n"},
55
56	{"mulsl Dn,Da:Db", mul64sreg, "emulated on 68060"},
57	{"mulul Dn,Da:Db", mul64ureg, "\t\""},
58	{"mulsl sp@(8),Da:Db", mul64smem, "\t\""},
59	{"mulul sp@(8),Da:Db", mul64umem, "\t\"\n"},
60
61	{"divsl Da:Db,Dn", div64sreg, "\t\""},
62	{"divul Da:Db,Dn", div64ureg, "\t\""},
63	{"divsl Da:Db,sp@(8)", div64smem, "\t\""},
64	{"divul Da:Db,sp@(8)", div64umem, "\t\"\n"},
65
66	{NULL, NULL, NULL}
67};
68
69jmp_buf jbuf;
70void illhand (int);
71
72int
73main(argc, argv)
74	int argc;
75	char *argv[];
76{
77	const struct test *t;
78	clock_t start, stop;
79	int count;
80
81
82	if (signal(SIGILL, &illhand))
83		warn("%s: can't install illegal instruction handler.",
84		    argv[0]);
85
86	printf("Speed of instructions which are emulated on some cpus:\n\n");
87	(void)sleep(1);
88	for (t=testlist; t->name; t++) {
89		printf("%-20s", t->name);
90		fflush(stdout);
91
92		if (setjmp(jbuf)) {
93			printf("%12s    %s\n", "[unimplemented]", t->comment);
94			continue;
95		}
96
97		count = 1000;
98		do {
99			count *= 2;
100			start = clock();
101			t->func(count);
102			stop = clock();
103		} while ((stop - start) < PRECISION);
104		printf("%10d/s    %s\n",
105		    CLOCKS_PER_SEC*(count /(stop - start)),
106		    t->comment);
107	}
108	exit (0);
109}
110
111void
112illhand(int i)
113{
114	longjmp(jbuf, 1);
115}
116