Re: [Qemu-devel] [PATCH v2 3/7] s390x/tcg: properly implement the TOD

[Richard Henderson]

On 06/20/2018 12:08 AM, David Hildenbrand wrote:
> +/* Converts ns to s390's clock format */
> +static inline uint64_t time2tod(uint64_t ns)
> +{
> +    return (ns << 9) / 125;
> +}
> +
> +/* Converts s390's clock format to ns */
> +static inline uint64_t tod2time(uint64_t t)
> +{
> +    return (t * 125) >> 9;
> +}

How many significant bits on input here?
Do you in fact want to be using muldiv64?


r~