| use super::copysignf; |
| use super::truncf; |
| use core::f32; |
| |
| #[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] |
| pub fn roundf(x: f32) -> f32 { |
| truncf(x + copysignf(0.5 - 0.25 * f32::EPSILON, x)) |
| } |
| |
| // PowerPC tests are failing on LLVM 13: https://github.com/rust-lang/rust/issues/88520 |
| #[cfg(not(target_arch = "powerpc64"))] |
| #[cfg(test)] |
| mod tests { |
| use super::roundf; |
| |
| #[test] |
| fn negative_zero() { |
| assert_eq!(roundf(-0.0_f32).to_bits(), (-0.0_f32).to_bits()); |
| } |
| |
| #[test] |
| fn sanity_check() { |
| assert_eq!(roundf(-1.0), -1.0); |
| assert_eq!(roundf(2.8), 3.0); |
| assert_eq!(roundf(-0.5), -1.0); |
| assert_eq!(roundf(0.5), 1.0); |
| assert_eq!(roundf(-1.5), -2.0); |
| assert_eq!(roundf(1.5), 2.0); |
| } |
| } |
