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Moved impl of `MulAdd`/`MulAddAssign` for `f32`/`f64` behind feature guard

This commit is contained in:
Vincent Esche 2018-04-18 10:31:37 +02:00
parent 830363024b
commit 28be885481
1 changed files with 8 additions and 20 deletions
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28
src/ops/mul_add.rs
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@ -33,29 +33,23 @@ pub trait MulAddAssign<A = Self, B = Self> {
fn mul_add_assign(&mut self, a: A, b: B); fn mul_add_assign(&mut self, a: A, b: B);
} }
#[cfg(feature = "std")]
impl MulAdd<f32, f32> for f32 { impl MulAdd<f32, f32> for f32 {
type Output = Self; type Output = Self;
#[inline] #[inline]
fn mul_add(self, a: Self, b: Self) -> Self::Output { fn mul_add(self, a: Self, b: Self) -> Self::Output {
if cfg!(feature = "std") { f32::mul_add(self, a, b)
f32::mul_add(self, a, b)
} else {
(self * a) + b
}
} }
} }
#[cfg(feature = "std")]
impl MulAdd<f64, f64> for f64 { impl MulAdd<f64, f64> for f64 {
type Output = Self; type Output = Self;
#[inline] #[inline]
fn mul_add(self, a: Self, b: Self) -> Self::Output { fn mul_add(self, a: Self, b: Self) -> Self::Output {
if cfg!(feature = "std") { f64::mul_add(self, a, b)
f64::mul_add(self, a, b)
} else {
(self * a) + b
}
} }
} }
@ -74,25 +68,19 @@ macro_rules! mul_add_impl {
mul_add_impl!(MulAdd for isize usize i8 u8 i16 u16 i32 u32 i64 u64); mul_add_impl!(MulAdd for isize usize i8 u8 i16 u16 i32 u32 i64 u64);
#[cfg(feature = "std")]
impl MulAddAssign<f32, f32> for f32 { impl MulAddAssign<f32, f32> for f32 {
#[inline] #[inline]
fn mul_add_assign(&mut self, a: Self, b: Self) { fn mul_add_assign(&mut self, a: Self, b: Self) {
if cfg!(feature = "std") { *self = f32::mul_add(*self, a, b)
*self = f32::mul_add(*self, a, b)
} else {
*self = (*self * a) + b
}
} }
} }
#[cfg(feature = "std")]
impl MulAddAssign<f64, f64> for f64 { impl MulAddAssign<f64, f64> for f64 {
#[inline] #[inline]
fn mul_add_assign(&mut self, a: Self, b: Self) { fn mul_add_assign(&mut self, a: Self, b: Self) {
if cfg!(feature = "std") { *self = f64::mul_add(*self, a, b)
*self = f64::mul_add(*self, a, b)
} else {
*self = (*self * a) + b
}
} }
} }