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/*
* // Copyright (c) Radzivon Bartoshyk 6/2025. All rights reserved.
* //
* // Redistribution and use in source and binary forms, with or without modification,
* // are permitted provided that the following conditions are met:
* //
* // 1. Redistributions of source code must retain the above copyright notice, this
* // list of conditions and the following disclaimer.
* //
* // 2. Redistributions in binary form must reproduce the above copyright notice,
* // this list of conditions and the following disclaimer in the documentation
* // and/or other materials provided with the distribution.
* //
* // 3. Neither the name of the copyright holder nor the names of its
* // contributors may be used to endorse or promote products derived from
* // this software without specific prior written permission.
* //
* // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#[inline]
pub(crate) const fn get_exponent_f32(x: f32) -> i32 {
let bits = x.to_bits();
(((bits >> 23) & 0xFF) as i32).wrapping_sub(127)
}
#[inline]
pub(crate) const fn mantissa_f32(x: f32) -> u32 {
x.to_bits() & ((1u32 << 23) - 1)
}
#[inline]
pub(crate) const fn mantissa_f64(x: f64) -> u64 {
x.to_bits() & ((1u64 << 52) - 1)
}
#[inline]
pub(crate) const fn get_exponent_f64(x: f64) -> i64 {
((x.to_bits() as i64 & EXP_MASK as i64) >> 52).wrapping_sub(1023)
}
#[inline]
pub(crate) const fn mask_trailing_ones(len: u64) -> u64 {
if len >= 64 {
u64::MAX
} else {
(1u64 << len).wrapping_sub(1)
}
}
pub(crate) const EXP_MASK: u64 = mask_trailing_ones(11) << 52;
#[inline]
pub(crate) fn set_exponent_f64(x: u64, new_exp: u64) -> u64 {
let encoded_mask = new_exp.wrapping_shl(52) & EXP_MASK;
x ^ ((x ^ encoded_mask) & EXP_MASK)
}
#[inline]
pub(crate) const fn min_normal_f32(sign: bool) -> f32 {
let sign_bit = if sign { 1u32 << 31 } else { 0 };
let exponent = 1u32 << 23;
f32::from_bits(sign_bit | exponent)
}