266 			/* -infinity gives -1 (p16-10) */  in f2xm1()
343 		/* The 80486 treats infinity as an invalid operand */  in fptan()
484 			arith_invalid(0);	/* sqrt(-Infinity) is invalid */  in fsqrt_()
602 		/* The 80486 treats infinity as an invalid operand */  in f_sin()
677 		/* The 80486 treats infinity as an invalid operand */  in f_cos()
722 		/* The 80486 treats infinity as an invalid operand */  in fsincos()
1002 				/* fprem(Valid,Infinity) is o.k. */  in do_fprem()
1009 			arith_invalid(0);	/* fprem(Infinity,?) is invalid */  in do_fprem()
1139 	/* One or both arg must be an infinity */  in fyl2x()
1142 			/* log(-infinity) or 0*log(infinity) */  in fyl2x()
1156 	/* st(1) must be infinity here */  in fyl2x()
1164 				/* infinity*log(1) */  in fyl2x()
1265 			/* st(1) is infinity, st(0) not infinity */  in fpatan()
1368 			/* Infinity*log(1) */  in fyl2xp1()
1444 			if (arith_invalid(1) < 0)	/* log(-infinity) */  in fyl2xp1()
1452 			if (arith_invalid(1) < 0)	/* log(-infinity) */  in fyl2xp1()
1456 			/* log(infinity) */  in fyl2xp1()
1466 		/* The Manual says that log(Infinity) is invalid, but a real  in fyl2xp1()
1586 				arith_invalid(0);	/* Zero scaled by +Infinity */  in fscale()
1605 				arith_invalid(0);	/* Infinity scaled by -Infinity */  in fscale()