This intrinsic inserts a
VABS instruction or an equivalent code sequence into the instruction stream generated by the compiler. It enables you to obtain the absolute value of a double-precision floating-point value from within your C or C++ code.
__fabsintrinsic is an analog of the standard C library function
fabs(). It differs from the standard library function in that a call to
__fabsis guaranteed to be compiled into a single, inline, machine instruction on an ARM architecture-based processor equipped with a VFP coprocessor.
is a double-precision floating-point value.
__fabs intrinsic returns the absolute value of