| use core::f32; |
| |
| /// Ceil (f32) |
| /// |
| /// Finds the nearest integer greater than or equal to `x`. |
| #[inline] |
| #[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] |
| pub fn ceilf(x: f32) -> f32 { |
| // On wasm32 we know that LLVM's intrinsic will compile to an optimized |
| // `f32.ceil` native instruction, so we can leverage this for both code size |
| // and speed. |
| llvm_intrinsically_optimized! { |
| #[cfg(target_arch = "wasm32")] { |
| return unsafe { ::core::intrinsics::ceilf32(x) } |
| } |
| } |
| let mut ui = x.to_bits(); |
| let e = (((ui >> 23) & 0xff).wrapping_sub(0x7f)) as i32; |
| |
| if e >= 23 { |
| return x; |
| } |
| if e >= 0 { |
| let m = 0x007fffff >> e; |
| if (ui & m) == 0 { |
| return x; |
| } |
| force_eval!(x + f32::from_bits(0x7b800000)); |
| if ui >> 31 == 0 { |
| ui += m; |
| } |
| ui &= !m; |
| } else { |
| force_eval!(x + f32::from_bits(0x7b800000)); |
| if ui >> 31 != 0 { |
| return -0.0; |
| } else if ui << 1 != 0 { |
| return 1.0; |
| } |
| } |
| f32::from_bits(ui) |
| } |
