__riscv_ffb
In this section:
Syntax
unsigned long __riscv_ffb(unsigned long, unsigned long);
Description
Inserts an ffb instruction (“Find first byte”). This instruction is part of the Andes Performance Extension and requires that you have included the header file iar_andesperf_intrinsics.h.
Note
To use intrinsic functions in an application, you must include the header file(s) where they are declared, see Summary of intrinsic functions.