These intrinsics perform the following calculation, incurring only a single rounding step:
result= a × b + c
Performing the calculation with a single rounding step, rather than multiplying and then adding with two roundings, can result in a better degree of accuracy.
math.h, the FMA intrinsics
c); float fmaf(float
c); long double fmal(long double
a, long double
b, long double
These intrinsics are only available in C99 mode.
They are only supported for the Cortex-A5 and Cortex-M4 processors.
If compiling for the Cortex-M4 processor, only