lib.rs - source
Description: Source of the Rust file `/Users/erlendbasso/.cargo/registry/src/github.com-1ecc6299db9ec823/libm-0.2.6/src/lib.rs`.
Keywords: rust, rustlang, rust-lang

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    //! libm in pure Rust
    #![deny(warnings)]
    #![no_std]
    #![cfg_attr(all(feature = "unstable"), feature(core_intrinsics))]
    #![allow(clippy::unreadable_literal)]
    #![allow(clippy::many_single_char_names)]
    #![allow(clippy::needless_return)]
    #![allow(clippy::int_plus_one)]
    #![allow(clippy::deprecated_cfg_attr)]
    #![allow(clippy::mixed_case_hex_literals)]
    #![allow(clippy::float_cmp)]
    #![allow(clippy::eq_op)]
    #![allow(clippy::assign_op_pattern)]

    mod math;

    use core::{f32, f64};

    pub use self::math::*;

    /// Approximate equality with 1 ULP of tolerance
    #[doc(hidden)]
    #[inline]
    pub fn _eqf(a: f32, b: f32) -> Result<(), u32> {
        if a.is_nan() && b.is_nan() {
            Ok(())
        } else {
            let err = (a.to_bits() as i32).wrapping_sub(b.to_bits() as i32).abs();

            if err <= 1 {
                Ok(())
            } else {
                Err(err as u32)
            }
        }
    }

    #[doc(hidden)]
    #[inline]
    pub fn _eq(a: f64, b: f64) -> Result<(), u64> {
        if a.is_nan() && b.is_nan() {
            Ok(())
        } else {
            let err = (a.to_bits() as i64).wrapping_sub(b.to_bits() as i64).abs();

            if err <= 1 {
                Ok(())
            } else {
                Err(err as u64)
            }
        }
    }

    // PowerPC tests are failing on LLVM 13: https://github.com/rust-lang/rust/issues/88520
    #[cfg(not(target_arch = "powerpc64"))]
    #[cfg(all(test, feature = "musl-reference-tests"))]
    include!(concat!(env!("OUT_DIR"), "/musl-tests.rs"));