MIL(3F-SVR3)        RISC/os Reference Manual         MIL(3F-SVR3)



NAME
     mil: ior, iand, not, ieor, ishft, ishftc, ibits, btest,
          ibset, ibclr, mvbits - Fortran Military Standard func-
          tions

SYNOPSIS
     integer i, k, l, m, n, len
     logical b

     i = ior(m, n)
     i = iand(m, n)
     i = not(m)
     i = ieor(m, n)
     i = ishft(m, k)
     i = ishftc(m, k, len)
     i = ibits(m, k, len)
     b = btest(n, k)
     i = ibset(n, k)
     i = ibclr(n, k)
     call mvbits(m, k, len, n, l)

DESCRIPTION
     mil is the general name for the bit field manipulation
     intrinsic functions and subroutines from the Fortran Mili-
     tary Standard (MIL-STD-1753).  ior, iand, not, ieor - return
     the same results as and, or, not, xor as defined in
     bool(3F).

     ishft, ishftc - m specifies the integer to be shifted.  k
     specifies the shift count.  k > 0 indicates a left shift.  k
     = 0 indicates no shift.  k < 0 indicates a right shift.  In
     ishft, zeros are shifted in.  In ishftc, the rightmost len
     bits are shifted circularly k bits.  If k is greater than
     the machine word-size, ishftc will not shift.

     Bit fields are numbered from right to left and the rightmost
     bit position is zero.  The length of the len field must be
     greater than zero.

     ibits - extract a subfield of len bits from m starting with
     bit position k and extending left for len bits.  The result
     field is right justified and the remaining bits are set to
     zero.

     btest - The kth bit of argument n is tested.  The value of
     the function is .TRUE. if the bit is a 1 and .FALSE. if the
     bit is 0.

     ibset - the result is the value of n with the kth bit set to
     1.





                        Printed 11/19/92                   Page 1

MIL(3F-SVR3)        RISC/os Reference Manual         MIL(3F-SVR3)



     ibclr - the result is the value of n with the kth bit set to
     0.

     mvbits - len bits are moved beginning at position k of argu-
     ment m to position l of argument n.

SEE ALSO
     bool(3F).















































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