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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 02:49:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 02:49:50 +0000 |
commit | 9835e2ae736235810b4ea1c162ca5e65c547e770 (patch) | |
tree | 3fcebf40ed70e581d776a8a4c65923e8ec20e026 /vendor/libm-0.1.4/src/math/roundf.rs | |
parent | Releasing progress-linux version 1.70.0+dfsg2-1~progress7.99u1. (diff) | |
download | rustc-9835e2ae736235810b4ea1c162ca5e65c547e770.tar.xz rustc-9835e2ae736235810b4ea1c162ca5e65c547e770.zip |
Merging upstream version 1.71.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/libm-0.1.4/src/math/roundf.rs')
-rw-r--r-- | vendor/libm-0.1.4/src/math/roundf.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/vendor/libm-0.1.4/src/math/roundf.rs b/vendor/libm-0.1.4/src/math/roundf.rs new file mode 100644 index 000000000..839d9469a --- /dev/null +++ b/vendor/libm-0.1.4/src/math/roundf.rs @@ -0,0 +1,35 @@ +use core::f32; + +const TOINT: f32 = 1.0 / f32::EPSILON; + +#[inline] +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] +pub fn roundf(mut x: f32) -> f32 { + let i = x.to_bits(); + let e: u32 = i >> 23 & 0xff; + let mut y: f32; + + if e >= 0x7f + 23 { + return x; + } + if i >> 31 != 0 { + x = -x; + } + if e < 0x7f - 1 { + force_eval!(x + TOINT); + return 0.0 * x; + } + y = x + TOINT - TOINT - x; + if y > 0.5f32 { + y = y + x - 1.0; + } else if y <= -0.5f32 { + y = y + x + 1.0; + } else { + y = y + x; + } + if i >> 31 != 0 { + -y + } else { + y + } +} |