VEC_$IADD_MULT16                  Domain/OS                   VEC_$IADD_MULT16


NAME
     vec_$iadd_mult16 - add one 16-bit integer vector to a scalar, multiply by
     another vector

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

     void vec_$iadd_mult16(
          short int *mult_vec,
          short int *add_vec,
          long int &length,
          short int &constant,
          short int *result_vec)

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

     procedure vec_$iadd_mult16(
          in mult_vec: univ vec_$integer16_vector;
          in add_vec: univ vec_$integer16_vector;
          in length: integer32;
          in constant: integer16;
          out result_vec: univ vec_$integer16_vector);

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

           parameter (nvec = 10)

           integer*2 mult_vec(nvec), add_vec(nvec), result_vec(nvec), constant
           integer*4 length

           call vec_$iadd_mult16(mult_vec, add_vec, length, constant, result_vec)

DESCRIPTION
     Vec_$iadd_mult16 adds its argument vector add_vec to the scalar constant,
     multiplies the result by the argument vector mult_vec,  and stores the
     final result in result_vec.  It differs from vec_$add_mult in that the
     vectors being handled are double-precision floating point.  The calcula-
     tion performed is as follows:

     For each integer I such that 1 <= I <= length,
     result_vec(I) = (constant + add_vec(I)) x mult_vec(I)


     Note that the multiplication done by this call is point-wise.  This call
     does not perform matrix multiplication, since the product of two vectors
     is another vector of the same magnitude.

     mult_vec
          A multiplicand vector.

     add_vec
          An addend vector.

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

     constant
          The scalar constant by which add_vec is multiplied.

     result_vec
          The vector created by multiplying mult_vec by constant and adding
          the result to add_vec.

NOTES
     When vec_$iadd_mult16 is used to operate on matrixes in C and Pascal,
     mult_vec, add_vec, 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_mult16, like all 16-bit integer routines, performs poorly when
     compared to the 32-bit integer routines.  Its use should be avoided wher-
     ever possible, especially on high-performance workstations.

SEE ALSO
     vec_$add_mult, vec_$sub_mult, vec_$mult_add, vec_$mult_sub,
     vec_$add_mult_i, vec_$dadd_mult, vec_$dadd_mult_i, vec_$iadd_mult,
     vec_$iadd_mult_i, vec_$iadd_mult16_i.