# [−][src]Trait num_traits::ops::mul_add::MulAdd

    pub trait MulAdd<A = Self, B = Self> {
        type Output;
        fn mul_add(self, a: A, b: B) -> Self::Output;
    }

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 <= f32::EPSILON);

## Associated Types

### `type Output`

The resulting type after applying the fused multiply-add.

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## Required methods

### `fn mul_add(self, a: A, b: B) -> Self::Output`

Performs the fused multiply-add operation.

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## Implementations on Foreign Types

### `impl MulAdd<f32, f32> for f32`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<f64, f64> for f64`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<isize, isize> for isize`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<usize, usize> for usize`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<i8, i8> for i8`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<u8, u8> for u8`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<i16, i16> for i16`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<u16, u16> for u16`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<i32, i32> for i32`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<u32, u32> for u32`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<i64, i64> for i64`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<u64, u64> for u64`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<i128, i128> for i128`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

### `impl MulAdd<u128, u128> for u128`[src]

#### `type Output = Self`

#### `fn mul_add(self, a: Self, b: Self) -> Self::Output`[src]

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## Implementors

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