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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/num-traits/src/ops/mul_add.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
Diffstat (limited to 'vendor/num-traits/src/ops/mul_add.rs')
-rw-r--r--vendor/num-traits/src/ops/mul_add.rs149
1 files changed, 0 insertions, 149 deletions
diff --git a/vendor/num-traits/src/ops/mul_add.rs b/vendor/num-traits/src/ops/mul_add.rs
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index 51beb55..0000000
--- a/vendor/num-traits/src/ops/mul_add.rs
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@@ -1,149 +0,0 @@
-/// Fused multiply-add. Computes `(self * a) + b` with only one rounding
-/// error, yielding a more accurate result than an unfused multiply-add.
-///
-/// Using `mul_add` can be more performant than an unfused multiply-add if
-/// the target architecture has a dedicated `fma` CPU instruction.
-///
-/// Note that `A` and `B` are `Self` by default, but this is not mandatory.
-///
-/// # Example
-///
-/// ```
-/// use std::f32;
-///
-/// let m = 10.0_f32;
-/// let x = 4.0_f32;
-/// let b = 60.0_f32;
-///
-/// // 100.0
-/// let abs_difference = (m.mul_add(x, b) - (m*x + b)).abs();
-///
-/// assert!(abs_difference <= 100.0 * f32::EPSILON);
-/// ```
-pub trait MulAdd<A = Self, B = Self> {
- /// The resulting type after applying the fused multiply-add.
- type Output;
-
- /// Performs the fused multiply-add operation `(self * a) + b`
- fn mul_add(self, a: A, b: B) -> Self::Output;
-}
-
-/// The fused multiply-add assignment operation `*self = (*self * a) + b`
-pub trait MulAddAssign<A = Self, B = Self> {
- /// Performs the fused multiply-add assignment operation `*self = (*self * a) + b`
- fn mul_add_assign(&mut self, a: A, b: B);
-}
-
-#[cfg(any(feature = "std", feature = "libm"))]
-impl MulAdd<f32, f32> for f32 {
- type Output = Self;
-
- #[inline]
- fn mul_add(self, a: Self, b: Self) -> Self::Output {
- <Self as crate::Float>::mul_add(self, a, b)
- }
-}
-
-#[cfg(any(feature = "std", feature = "libm"))]
-impl MulAdd<f64, f64> for f64 {
- type Output = Self;
-
- #[inline]
- fn mul_add(self, a: Self, b: Self) -> Self::Output {
- <Self as crate::Float>::mul_add(self, a, b)
- }
-}
-
-macro_rules! mul_add_impl {
- ($trait_name:ident for $($t:ty)*) => {$(
- impl $trait_name for $t {
- type Output = Self;
-
- #[inline]
- fn mul_add(self, a: Self, b: Self) -> Self::Output {
- (self * a) + b
- }
- }
- )*}
-}
-
-mul_add_impl!(MulAdd for isize i8 i16 i32 i64 i128);
-mul_add_impl!(MulAdd for usize u8 u16 u32 u64 u128);
-
-#[cfg(any(feature = "std", feature = "libm"))]
-impl MulAddAssign<f32, f32> for f32 {
- #[inline]
- fn mul_add_assign(&mut self, a: Self, b: Self) {
- *self = <Self as crate::Float>::mul_add(*self, a, b)
- }
-}
-
-#[cfg(any(feature = "std", feature = "libm"))]
-impl MulAddAssign<f64, f64> for f64 {
- #[inline]
- fn mul_add_assign(&mut self, a: Self, b: Self) {
- *self = <Self as crate::Float>::mul_add(*self, a, b)
- }
-}
-
-macro_rules! mul_add_assign_impl {
- ($trait_name:ident for $($t:ty)*) => {$(
- impl $trait_name for $t {
- #[inline]
- fn mul_add_assign(&mut self, a: Self, b: Self) {
- *self = (*self * a) + b
- }
- }
- )*}
-}
-
-mul_add_assign_impl!(MulAddAssign for isize i8 i16 i32 i64 i128);
-mul_add_assign_impl!(MulAddAssign for usize u8 u16 u32 u64 u128);
-
-#[cfg(test)]
-mod tests {
- use super::*;
-
- #[test]
- fn mul_add_integer() {
- macro_rules! test_mul_add {
- ($($t:ident)+) => {
- $(
- {
- let m: $t = 2;
- let x: $t = 3;
- let b: $t = 4;
-
- assert_eq!(MulAdd::mul_add(m, x, b), (m*x + b));
- }
- )+
- };
- }
-
- test_mul_add!(usize u8 u16 u32 u64 isize i8 i16 i32 i64);
- }
-
- #[test]
- #[cfg(feature = "std")]
- fn mul_add_float() {
- macro_rules! test_mul_add {
- ($($t:ident)+) => {
- $(
- {
- use core::$t;
-
- let m: $t = 12.0;
- let x: $t = 3.4;
- let b: $t = 5.6;
-
- let abs_difference = (MulAdd::mul_add(m, x, b) - (m*x + b)).abs();
-
- assert!(abs_difference <= 46.4 * $t::EPSILON);
- }
- )+
- };
- }
-
- test_mul_add!(f32 f64);
- }
-}