- #[test]
- #[allow(deprecated)]
- fn test_ldexp() {
- let f1 = 2.0f32.powi(-123);
- let f2 = 2.0f32.powi(-111);
- let f3 = 1.75 * 2.0f32.powi(-12);
- assert_eq!(f32::ldexp(1f32, -123), f1);
- assert_eq!(f32::ldexp(1f32, -111), f2);
- assert_eq!(f32::ldexp(1.75f32, -12), f3);
-
- assert_eq!(f32::ldexp(0f32, -123), 0f32);
- assert_eq!(f32::ldexp(-0f32, -123), -0f32);
-
- let inf: f32 = f32::INFINITY;
- let neg_inf: f32 = f32::NEG_INFINITY;
- let nan: f32 = f32::NAN;
- assert_eq!(f32::ldexp(inf, -123), inf);
- assert_eq!(f32::ldexp(neg_inf, -123), neg_inf);
- assert!(f32::ldexp(nan, -123).is_nan());
- }
-
- #[test]
- #[allow(deprecated)]
- fn test_frexp() {
- let f1 = 2.0f32.powi(-123);
- let f2 = 2.0f32.powi(-111);
- let f3 = 1.75 * 2.0f32.powi(-123);
- let (x1, exp1) = f1.frexp();
- let (x2, exp2) = f2.frexp();
- let (x3, exp3) = f3.frexp();
- assert_eq!((x1, exp1), (0.5f32, -122));
- assert_eq!((x2, exp2), (0.5f32, -110));
- assert_eq!((x3, exp3), (0.875f32, -122));
- assert_eq!(f32::ldexp(x1, exp1), f1);
- assert_eq!(f32::ldexp(x2, exp2), f2);
- assert_eq!(f32::ldexp(x3, exp3), f3);
-
- assert_eq!(0f32.frexp(), (0f32, 0));
- assert_eq!((-0f32).frexp(), (-0f32, 0));
- }
-
- #[test] #[cfg_attr(windows, ignore)] // FIXME #8755
- #[allow(deprecated)]
- fn test_frexp_nowin() {
- let inf: f32 = f32::INFINITY;
- let neg_inf: f32 = f32::NEG_INFINITY;
- let nan: f32 = f32::NAN;
- assert_eq!(match inf.frexp() { (x, _) => x }, inf);
- assert_eq!(match neg_inf.frexp() { (x, _) => x }, neg_inf);
- assert!(match nan.frexp() { (x, _) => x.is_nan() })
- }
-