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VEC_$IADD_ADD_VECTOR16            Domain/OS             VEC_$IADD_ADD_VECTOR16


NAME
     vec_$iadd_add_vector16 - add three single-precision vectors

SYNOPSIS (C)
     #include <apollo/base.h>
     #include <apollo/vec.h>

     void vec_$iadd_add_vector16(
          short int *start_vec,
          short int *add_vec,
          short int *add_vec_2,
          long int &length,
          short int *result_vec)

SYNOPSIS (Pascal)
     %include '/sys/ins/base.ins.pas';
     %include '/sys/ins/vec.ins.pas';

     procedure vec_$iadd_add_vector16(
          in start_vec: univ vec_$integer16_vector;
          in add_vec: univ vec_$integer16_vector;
          in add_vec_2: univ vec_$integer16_vector;
          in length: integer32;
          out result_vec: univ vec_$integer16_vector);

SYNOPSIS (FORTRAN)
     %include '/sys/ins/base.ins.ftn'
     %include '/sys/ins/vec.ins.ftn'

           parameter (nvec = 10)

           integer*2 start_vec(nvec), result_vec(nvec), add_vec(nvec), add_vec_2(nvec)
           integer*4 length

           call vec_$iadd_add_vector16(start_vec, add_vec, add_vec_2, length, result_vec)

DESCRIPTION
     Vec_$iadd_add_vector16 adds the vectors start_vec,  add_vec, and
     add_vec_2 and stores the final result in result_vec.  It differs from
     vec_$add_add_vector in that the vectors being handled contain 16-bit
     integers.  The calculation performed is as follows:

     For each integer I such that 1 <= I <= length,
     result_vec(I) = start_vec(I) + add_vec(I) + add_vec_2(I)


     start_vec
          An addend vector.

     add_vec
          An addend vector.

     add_vec_2
          An addend vector.

     length
          The number of elements to be operated on;  normally the same as the
          number of elements in the vectors.

     result_vec
          The vector created by adding start_vec, add_vec, and add_vec_2.

NOTES
     When vec_$iadd_add_vector16 is used to operate on matrixes in C and Pas-
     cal, start_vec, add_vec, add_vec_2, and result_vec are row vectors; in
     FORTRAN, they are column vectors.

     As in all the vec_$ calls, the result array must not overlap any of the
     input arrays; the result array may be identical to an input, but must not
     contain any subset of it.   Because of pipelining, using overlapping
     input and output arrays may cause incorrect results.

     Vec_$iadd_add_vector16, like all 16-bit integer routines, performs poorly
     when compared to the 32-bit integer routines.  Its use should be avoided
     wherever possible, especially on high-performance workstations.

SEE ALSO
     vec_$add_mult_vector, vec_$sub_mult_vector, vec_$mult_add_vector,
     vec_$mult_sub_vector, vec_$mult_rsub_vector, vec_$sub_add_vector,
     vec_$mult_mult_vector, vec_$add_add_vector, vec_$add_add_vector_i,
     vec_$dadd_add_vector, vec_$dadd_add_vector_i, vec_$iadd_add_vector,
     vec_$iadd_add_vector_i, vec_$iadd_add_vector16_i.