fma
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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