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/*
 * setfpe - turn 80x87 support on/off
 *
 * All this program really does is tell the kernel to set or
 * clear bit 2 of cr0.
 *
 * Usage:  setfpe {off|on}
 *
 * When "off", floating poing instructions will cause trap #7 (DNA),
 * with signal 8 (SIGFPE).
 */
#include <stdio.h>
#include <sys/param.h>

char * cmd;

main(argc, argv)
int argc;
char ** argv;
{
	int a2, res;

	cmd = argv[0];
	if (argc != 2)
		usage();
	if (strcmp(argv[1], "on") == 0)
		a2 = 1;
	else if (strcmp(argv[1], "off") == 0)
		a2 = 0;
	else
		usage();
	res = cohcall(COH_SETFPE, a2);
	if (res == -1)
		perror("setfpe");
}

usage()
{
	fprintf(stderr, "Usage: %s {off|on}\n", cmd);
	exit(1);
}

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