Not doing so could cause a later use of this result mval in a division operation to issue a
fatal SIGINTDIV error (instead of a user-trappable DIVZERO error). This is because op_div.c
and op_idiv.c assume that if the divisor has the MV_INT bit not set, it is a non-zero value.
The MV_INT bit set is achieved by checking explicitly if both the mantissa (m[0] and m[1])
are zero and if so setting the mval to "literal_zero".
Not doing so could cause a later use of this result mval in a division operation to issue a fatal SIGINTDIV error (instead of a user-trappable DIVZERO error). This is because op_div.c and op_idiv.c assume that if the divisor has the MV_INT bit not set, it is a non-zero value.
The MV_INT bit set is achieved by checking explicitly if both the mantissa (m[0] and m[1]) are zero and if so setting the mval to "literal_zero".