fma
Multiply and add using fused multiply add approach
Syntax
Description
Examples
Multiply and Add Three Inputs Using Fused Multiply Add
This example shows how to use the fma
function to calculate using a fused multiply add approach.
Define the inputs and use the fma
function to compute the multiply add operation.
a = half(10); b = half(10); c = half(2); x = fma(a, b, c)
x = half 102
Compare the result of the fma
function with the two-step approach of computing the product and then the sum.
temp = a * b; x = temp + c
x = half 102
Input Arguments
A
— Input array
scalar | vector | matrix | multidimensional array
Input array, specified as a floating-point scalar, vector, matrix, or
multidimensional array. When A
and B
are
matrices, fma
performs element-wise multiplication followed by
addition.
Data Types: single
| double
| half
B
— Input array
scalar | vector | matrix | multidimensional array
Input array, specified as a floating-point scalar, vector, matrix, or
multidimensional array. When A
and B
are
matrices, fma
performs element-wise multiplication followed by
addition.
Data Types: single
| double
| half
C
— Input array
scalar | vector | matrix | multidimensional array
Input array, specified as a floating-point scalar, vector, matrix, or multidimensional array.
Data Types: single
| double
| half
Output Arguments
X
— Result of multiply and add operation
scalar | vector | matrix | multidimensional array
Result of multiply and add operation, A.*B+C, returned as a scalar, vector, matrix, or multidimensional array.
Version History
Introduced in R2019a
See Also
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