diff options
Diffstat (limited to 'src/libstd/f32.rs')
| -rw-r--r-- | src/libstd/f32.rs | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/src/libstd/f32.rs b/src/libstd/f32.rs index d752ba89a27..b392d6e7226 100644 --- a/src/libstd/f32.rs +++ b/src/libstd/f32.rs @@ -832,11 +832,7 @@ impl f32 { #[stable(feature = "rust1", since = "1.0.0")] #[inline] pub fn asinh(self) -> f32 { - if self == Self::NEG_INFINITY { - Self::NEG_INFINITY - } else { - (self + ((self * self) + 1.0).sqrt()).ln().copysign(self) - } + (self.abs() + ((self * self) + 1.0).sqrt()).ln().copysign(self) } /// Inverse hyperbolic cosine function. @@ -1413,6 +1409,8 @@ mod tests { assert!((-0.0f32).asinh().is_sign_negative()); // issue 63271 assert_approx_eq!(2.0f32.asinh(), 1.443635475178810342493276740273105f32); assert_approx_eq!((-2.0f32).asinh(), -1.443635475178810342493276740273105f32); + // regression test for the catastrophic cancellation fixed in 72486 + assert_approx_eq!((-3000.0f32).asinh(), -8.699514775987968673236893537700647f32); } #[test] |