[unix-history] / usr / src / undoc / fpe.c

From research!ikeya!rob  Sun Sep 13 17:04:21 1981
/*
 * This program prints an infinite number of fpe's,
 * because the pc is not advanced on FPE's.
 * 11/750 microcode bug.
 * On 11/780, die from Operand fault, which is
 * correct.
 * Please try it on your 750 and tell me what happens.
*/
#include <signal.h>
inter(){
	printf("fpe\n");
	signal(SIGFPE, inter);
	return;
}
main(){
	double x=0.0;
	signal(SIGFPE, inter);
	printf("%f\n", 3.4/x);
}
Commit	Line	Data
127d61a3 C	1	From research!ikeya!rob Sun Sep 13 17:04:21 1981
	2	/*
	3	* This program prints an infinite number of fpe's,
	4	* because the pc is not advanced on FPE's.
	5	* 11/750 microcode bug.
	6	* On 11/780, die from Operand fault, which is
	7	* correct.
	8	* Please try it on your 750 and tell me what happens.
	9	*/
	10	#include <signal.h>
	11	inter(){
	12	printf("fpe\n");
	13	signal(SIGFPE, inter);
	14	return;
	15	}
	16	main(){
	17	double x=0.0;
	18	signal(SIGFPE, inter);
	19	printf("%f\n", 3.4/x);
	20	}
	21
	22