On 11 Jan 2022 22:24, Dragan Mladjenovic wrote:
> --- a/sim/common/sim-fpu.h
> +++ b/sim/common/sim-fpu.h
>  
> +/* NaN handling. */
> +
> +INLINE_SIM_FPU (int) sim_fpu_op_nan (sim_fpu *f,
> +				     const sim_fpu *l, const sim_fpu *r);

please add a more descriptive comment.  the point of the header is for API
documentation so readers can look up to see what this function does.
-mike