Trait num_traits::ops::mul_add::MulAdd
[−]
[src]
pub trait MulAdd<A = Self, B = Self> { type Output; fn mul_add(self, a: A, b: B) -> Self::Output; }
The fused multiply-add operation. Computes (self * a) + b with only one rounding error. This produces a more accurate result with better performance than a separate multiplication operation followed by an add.
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 <= f32::EPSILON);
Associated Types
type Output
The resulting type after applying the fused multiply-add.