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      1 /*	$NetBSD: emuspeed.c,v 1.8 2011/05/18 18:41:59 tsutsui 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  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <err.h>
     30 #include <setjmp.h>
     31 #include <signal.h>
     32 #include <stdlib.h>
     33 #include <stdio.h>
     34 #include <time.h>
     35 #include <unistd.h>
     36 
     37 #include "speed.h"
     38 
     39 #define PRECISION 500
     40 
     41 const struct test {
     42 	const char *name;
     43 	void (*func)(int);
     44 	const char *comment;
     45 } testlist[] = {
     46 	{"Illegal", illegal, "(test: unimplemented)"},
     47 	{"mulsl Da,Db", mul32sreg, "(test: should be native)"},
     48 	{"mulsl sp@(8),Da", mul32smem, "(test: should be native)\n"},
     49 
     50 	{"mulsl Dn,Da:Db", mul64sreg, "emulated on 68060"},
     51 	{"mulul Dn,Da:Db", mul64ureg, "\t\""},
     52 	{"mulsl sp@(8),Da:Db", mul64smem, "\t\""},
     53 	{"mulul sp@(8),Da:Db", mul64umem, "\t\"\n"},
     54 
     55 	{"divsl Da:Db,Dn", div64sreg, "\t\""},
     56 	{"divul Da:Db,Dn", div64ureg, "\t\""},
     57 	{"divsl Da:Db,sp@(8)", div64smem, "\t\""},
     58 	{"divul Da:Db,sp@(8)", div64umem, "\t\"\n"},
     59 
     60 	{NULL, NULL, NULL}
     61 };
     62 
     63 jmp_buf jbuf;
     64 void illhand (int);
     65 int main(int, char *[]);
     66 
     67 int
     68 main(argc, argv)
     69 	int argc;
     70 	char *argv[];
     71 {
     72 	const struct test *t;
     73 	clock_t start, stop;
     74 	int count;
     75 
     76 
     77 	if (signal(SIGILL, &illhand))
     78 		warn("%s: can't install illegal instruction handler.",
     79 		    argv[0]);
     80 
     81 	printf("Speed of instructions which are emulated on some cpus:\n\n");
     82 	(void)sleep(1);
     83 	for (t=testlist; t->name; t++) {
     84 		printf("%-20s", t->name);
     85 		fflush(stdout);
     86 
     87 		if (setjmp(jbuf)) {
     88 			printf("%12s    %s\n", "[unimplemented]", t->comment);
     89 			continue;
     90 		}
     91 
     92 		count = 1000;
     93 		do {
     94 			count *= 2;
     95 			start = clock();
     96 			t->func(count);
     97 			stop = clock();
     98 		} while ((stop - start) < PRECISION);
     99 		printf("%10lu/s    %s\n",
    100 		    CLOCKS_PER_SEC*(count /(stop - start)),
    101 		    t->comment);
    102 	}
    103 	exit (0);
    104 }
    105 
    106 void
    107 illhand(int i)
    108 {
    109 	longjmp(jbuf, 1);
    110 }
    111