359 	register FPU_REG *st1_ptr = st0_ptr;	/* anticipate */  in fxtract()  local
372 		sign = getsign(st1_ptr);  in fxtract()
373 		reg_copy(st1_ptr, st_new_ptr);  in fxtract()
404 		sign = getsign(st1_ptr);  in fxtract()
405 		FPU_to_exp16(st1_ptr, st_new_ptr);  in fxtract()
781 	FPU_REG *st1_ptr = &st(1);  in do_fprem()  local
798 		st1_sign = FPU_to_exp16(st1_ptr, &st1);  in do_fprem()
958 		st1_tag = FPU_Special(st1_ptr);  in do_fprem()
1016 	real_2op_NaN(st1_ptr, st1_tag, 0, st1_ptr);  in do_fprem()
1023 	FPU_REG *st1_ptr = &st(1), exponent;  in fyl2x()  local
1063 				sign = getsign(st1_ptr);  in fyl2x()
1065 					FPU_to_exp16(st1_ptr, st1_ptr);  in fyl2x()
1068 					setexponent16(st1_ptr,  in fyl2x()
1069 						      exponent(st1_ptr));  in fyl2x()
1070 				poly_l2(st0_ptr, st1_ptr, sign);  in fyl2x()
1086 		st1_tag = FPU_Special(st1_ptr);  in fyl2x()
1099 				sign = getsign(st1_ptr) ^ SIGN_NEG;  in fyl2x()
1103 				setsign(st1_ptr, sign);  in fyl2x()
1108 			sign = getsign(st1_ptr);  in fyl2x()
1122 				setsign(st1_ptr, sign);  in fyl2x()
1141 			u_char sign = getsign(st1_ptr);  in fyl2x()
1148 			setsign(st1_ptr, sign);  in fyl2x()
1171 			changesign(st1_ptr);  in fyl2x()
1179 			sign = getsign(st1_ptr);  in fyl2x()
1184 			changesign(st1_ptr);  in fyl2x()
1194 	FPU_REG *st1_ptr = &st(1);  in fpatan()  local
1202 		poly_atan(st0_ptr, st0_tag, st1_ptr, st1_tag);  in fpatan()
1212 		st1_tag = FPU_Special(st1_ptr);  in fpatan()
1229 		u_char sign = getsign(st1_ptr);  in fpatan()
1235 					setpositive(st1_ptr);  in fpatan()
1238 						      st1_ptr, FULL_PRECISION,  in fpatan()
1252 					setsign(st1_ptr, sign);	/* An 80486 preserves the sign */  in fpatan()
1267 		setsign(st1_ptr, sign);  in fpatan()
1270 		u_char sign = getsign(st1_ptr);  in fpatan()
1282 		setsign(st1_ptr, sign);  in fpatan()
1285 		u_char sign = getsign(st1_ptr);  in fpatan()
1291 		setsign(st1_ptr, sign);  in fpatan()
1315 	FPU_REG *st1_ptr = &st(1), a, b;  in fyl2xp1()  local
1323 		sign1 = getsign(st1_ptr);  in fyl2xp1()
1326 		FPU_to_exp16(st1_ptr, &b);  in fyl2xp1()
1328 		if (poly_l2p1(sign, sign1, &a, &b, st1_ptr))  in fyl2xp1()
1338 		st1_tag = FPU_Special(st1_ptr);  in fyl2xp1()
1358 			setsign(st0_ptr, getsign(st0_ptr) ^ getsign(st1_ptr));  in fyl2xp1()
1387 					changesign(st1_ptr);  in fyl2xp1()
1396 					changesign(st1_ptr);  in fyl2xp1()
1409 					changesign(st1_ptr);  in fyl2xp1()
1418 					changesign(st1_ptr);  in fyl2xp1()
1464 			u_char sign = getsign(st1_ptr);  in fyl2xp1()
1466 			setsign(st1_ptr, sign);  in fyl2xp1()
1483 	FPU_REG *st1_ptr = &st(1);  in fscale()  local
1498 		if (exponent(st1_ptr) > 30) {  in fscale()
1501 			if (signpositive(st1_ptr)) {  in fscale()
1514 		reg_copy(st1_ptr, &tmp);  in fscale()
1517 		scale = signnegative(st1_ptr) ? -tmp.sigl : tmp.sigl;  in fscale()
1531 		st1_tag = FPU_Special(st1_ptr);  in fscale()
1558 			if (signpositive(st1_ptr))  in fscale()
1566 			real_2op_NaN(st1_ptr, st1_tag, 0, st0_ptr);  in fscale()
1580 			if (signpositive(st1_ptr))  in fscale()
1585 			real_2op_NaN(st1_ptr, st1_tag, 0, st0_ptr);  in fscale()
1599 			if (signnegative(st1_ptr))  in fscale()
1604 			real_2op_NaN(st1_ptr, st1_tag, 0, st0_ptr);  in fscale()
1609 			real_2op_NaN(st1_ptr, st1_tag, 0, st0_ptr);  in fscale()