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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:21 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:21 +0000 |
commit | 4e8199b572f2035b7749cba276ece3a26630d23e (patch) | |
tree | f09feeed6a0fe39d027b1908aa63ea6b35e4b631 /library/std/src/f32.rs | |
parent | Adding upstream version 1.66.0+dfsg1. (diff) | |
download | rustc-4e8199b572f2035b7749cba276ece3a26630d23e.tar.xz rustc-4e8199b572f2035b7749cba276ece3a26630d23e.zip |
Adding upstream version 1.67.1+dfsg1.upstream/1.67.1+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'library/std/src/f32.rs')
-rw-r--r-- | library/std/src/f32.rs | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/library/std/src/f32.rs b/library/std/src/f32.rs index 3dd5b1250..4e3007624 100644 --- a/library/std/src/f32.rs +++ b/library/std/src/f32.rs @@ -77,9 +77,11 @@ impl f32 { /// ``` /// let f = 3.3_f32; /// let g = -3.3_f32; + /// let h = -3.7_f32; /// /// assert_eq!(f.round(), 3.0); /// assert_eq!(g.round(), -3.0); + /// assert_eq!(h.round(), -4.0); /// ``` #[rustc_allow_incoherent_impl] #[must_use = "method returns a new number and does not mutate the original value"] @@ -275,7 +277,7 @@ impl f32 { /// This result is not an element of the function's codomain, but it is the /// closest floating point number in the real numbers and thus fulfills the /// property `self == self.div_euclid(rhs) * rhs + self.rem_euclid(rhs)` - /// approximatively. + /// approximately. /// /// # Examples /// @@ -878,7 +880,9 @@ impl f32 { #[stable(feature = "rust1", since = "1.0.0")] #[inline] pub fn asinh(self) -> f32 { - (self.abs() + ((self * self) + 1.0).sqrt()).ln().copysign(self) + let ax = self.abs(); + let ix = 1.0 / ax; + (ax + (ax / (Self::hypot(1.0, ix) + ix))).ln_1p().copysign(self) } /// Inverse hyperbolic cosine function. @@ -898,7 +902,11 @@ impl f32 { #[stable(feature = "rust1", since = "1.0.0")] #[inline] pub fn acosh(self) -> f32 { - if self < 1.0 { Self::NAN } else { (self + ((self * self) - 1.0).sqrt()).ln() } + if self < 1.0 { + Self::NAN + } else { + (self + ((self - 1.0).sqrt() * (self + 1.0).sqrt())).ln() + } } /// Inverse hyperbolic tangent function. |