Correct fns exp2 that were calling exp

Fixes #22080.

diff --git a/src/libstd/num/f32.rs b/src/libstd/num/f32.rs
index 9b5b0e62a3c1a7a141e4f965b867371ce36da187..58b93665fe15339bb981821b5b064cb165a66bb4 100644 (file)
--- a/src/libstd/num/f32.rs
+++ b/src/libstd/num/f32.rs
@@ -173,7 +173,7 @@ fn rsqrt(self) -> f32 { num::Float::rsqrt(self) }
     #[inline]
     fn exp(self) -> f32 { num::Float::exp(self) }
     #[inline]
-    fn exp2(self) -> f32 { num::Float::exp(self) }
+    fn exp2(self) -> f32 { num::Float::exp2(self) }
     #[inline]
     fn ln(self) -> f32 { num::Float::ln(self) }
     #[inline]
@@ -554,6 +554,33 @@ fn test_fract() {
         assert_approx_eq!((-1.7f32).fract(), -0.7f32);
     }
 
+    #[test]
+    fn test_exp() {
+        assert_eq!(1.0, 0.0f32.exp());
+        assert_approx_eq!(2.718282, 1.0f32.exp());
+        assert_approx_eq!(148.413162, 5.0f32.exp());
+
+        let inf: f32 = Float::infinity();
+        let neg_inf: f32 = Float::neg_infinity();
+        let nan: f32 = Float::nan();
+        assert_eq!(inf, inf.exp());
+        assert_eq!(0.0, neg_inf.exp());
+        assert!(nan.exp().is_nan());
+    }
+
+    #[test]
+    fn test_exp2() {
+        assert_eq!(32.0, 5.0f32.exp2());
+        assert_eq!(1.0, 0.0f32.exp2());
+
+        let inf: f32 = Float::infinity();
+        let neg_inf: f32 = Float::neg_infinity();
+        let nan: f32 = Float::nan();
+        assert_eq!(inf, inf.exp2());
+        assert_eq!(0.0, neg_inf.exp2());
+        assert!(nan.exp2().is_nan());
+    }
+
     #[test]
     fn test_asinh() {
         assert_eq!(0.0f32.asinh(), 0.0f32);

diff --git a/src/libstd/num/f64.rs b/src/libstd/num/f64.rs
index 1c9558325292b207fb98bda6639c113dcb99b52f..8b17feeb70cdcfc35a7e18701a4abd615a007853 100644 (file)
--- a/src/libstd/num/f64.rs
+++ b/src/libstd/num/f64.rs
@@ -183,7 +183,7 @@ fn rsqrt(self) -> f64 { num::Float::rsqrt(self) }
     #[inline]
     fn exp(self) -> f64 { num::Float::exp(self) }
     #[inline]
-    fn exp2(self) -> f64 { num::Float::exp(self) }
+    fn exp2(self) -> f64 { num::Float::exp2(self) }
     #[inline]
     fn ln(self) -> f64 { num::Float::ln(self) }
     #[inline]
@@ -563,6 +563,33 @@ fn test_fract() {
         assert_approx_eq!((-1.7f64).fract(), -0.7f64);
     }
 
+    #[test]
+    fn test_exp() {
+        assert_eq!(1.0, 0.0f64.exp());
+        assert_approx_eq!(2.718282, 1.0f64.exp());
+        assert_approx_eq!(148.413159, 5.0f64.exp());
+
+        let inf: f64 = Float::infinity();
+        let neg_inf: f64 = Float::neg_infinity();
+        let nan: f64 = Float::nan();
+        assert_eq!(inf, inf.exp());
+        assert_eq!(0.0, neg_inf.exp());
+        assert!(nan.exp().is_nan());
+    }
+
+    #[test]
+    fn test_exp2() {
+        assert_eq!(32.0, 5.0f64.exp2());
+        assert_eq!(1.0, 0.0f64.exp2());
+
+        let inf: f64 = Float::infinity();
+        let neg_inf: f64 = Float::neg_infinity();
+        let nan: f64 = Float::nan();
+        assert_eq!(inf, inf.exp2());
+        assert_eq!(0.0, neg_inf.exp2());
+        assert!(nan.exp2().is_nan());
+    }
+
     #[test]
     fn test_asinh() {
         assert_eq!(0.0f64.asinh(), 0.0f64);