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__fabs intrinsic

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.


The __fabs intrinsic is an analogue of the standard C library function fabs. It differs from the standard library function in that a call to __fabs is guaranteed to be compiled into a single, inline, machine instruction on an ARM architecture-based processor equipped with a VFP coprocessor.


double __fabs(double val)



is a double-precision floating-point value.

Return value

The __fabs intrinsic returns the absolute value of val as a double.

See also