Syntax

double __fma(double x, double y, double z);
float __fmaf(float x, float y, float z);

Description

Fused floating-point multiply-accumulate computes x*y+z without intermediate rounding, which corresponds either to the intrinsic call __VFMA_F64(z, x, y) for double precision, or __VFMA_F32(z, x, y) for single precision.

These intrinsic functions are defined according to the Arm C Language Extensions (ACLE). For more details, see the ACLE documentation at developer.arm.com.