__enable_fiq
In this section:
Syntax
void __enable_fiq(void);
Description
In 32-bit mode: Enables fast interrupt requests (fiq). This intrinsic function can only be used in privileged mode, and it is not available for Cortex-M devices.
In 64-bit mode: Enables fast interrupt requests in the DAIF system register (bit 1).
Note
To use intrinsic functions in an application, you must include the header file(s) where they are declared, see Summary of intrinsic functions.