NAME

       rtapi_div_u64 - unsigned division of a 64-bit number by a 32-bit number

SYNTAX

       __u64 rtapi_div_u64_rem(__u64 dividend, __u32 divisor, __u32 *remainder)

       __u64 rtapi_div_u64(__u64 dividend, __u32 divisor)

       __s64 rtapi_div_s64(__s64 dividend, __s32 divisor)

       __s64 rtapi_div_s64_rem(__s64 dividend, __s32 divisor, __s32 *remainder)

ARGUMENTS

       dividend
              The value to be divided

       divisor
              The value to divide by

       remainder
              Pointer to the location to store the remainder.  This may not be a NULL pointer.  If the remainder
              is not desired, call rtapi_div_u64 or rtapi_div_s64.

DESCRIPTION

       Perform  integer  division  (and  optionally  compute  the  remainder)  with a 64-bit dividend and 32-bit
       divisor.

RETURN VALUE

       The result of integer division of dividend / divisor.  In  versions  with  the  remainder  argument,  the
       remainder is stored in the pointed-to location.

NOTES

       If the result of the division does not fit in the return type, the result is undefined.

       This  function  exists because in kernel space the use of the division operator on a 64-bit type can lead
       to an undefined symbol such as __umoddi3 when the module is loaded.

REALTIME CONSIDERATIONS

       May be called from  init/cleanup  code  and  from  within  realtime  tasks.   Available  in  non-realtime
       components.

LinuxCNC Documentation                             2006-10-12                              rtapi_div_u64(3rtapi)