vec_dadd_mult_constant()

VEC_$DADD_MULT_CONSTANT           Domain/OS            VEC_$DADD_MULT_CONSTANT


NAME
     vec_$dadd_mult_constant - add two double-precision vectors, multiply by a
     scalar

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


     void vec_$dadd_mult_constant(
          double *start_vec,
          double *add_vec,
          long int &length,
          double &constant,
          double *result_vec)

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

     procedure vec_$dadd_mult_constant(
          in start_vec: univ vec_$double_vector;
          in add_vec: univ vec_$double_vector;
          in length: integer32;
          in constant: double;
          out result_vec: univ vec_$double_vector);

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

           parameter (nvec = 10)

           real*8 start_vec(nvec), add_vec(nvec), result_vec(nvec), constant
           integer*4 length

           call vec_$dadd_mult_constant(start_vec, add_vec, length, constant, result_vec)

DESCRIPTION
     Vec_$dadd_mult_constant adds its two argument vectors, start_vec and
     add_vec, then multiplies the result by the scalar constant, and stores
     the final result in result_vec.  It differs from vec_$add_mult_constant
     in that the vectors being handled are double-precision floating point.

     The calculation performed is as follows:

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


     start_vec
          An addend 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 the result of the addition is
          multiplied.

     result_vec
          The vector created by adding start_vec and add_vec and multiplying
          the resulting vector by constant.

NOTES
     When vec_$dadd_mult_constant is used to operate on matrixes in C and Pas-
     cal, mult_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.


SEE ALSO
     vec_$add_mult_constant, vec_$mult_add_constant, vec_$sub_mult_constant,
     vec_$rsub_mult_constant, vec_$add_mult_constant_i,
     vec_$dadd_mult_constant_i, vec_$iadd_mult_constant,
     vec_$iadd_mult_constant_i, vec_$iadd_mult_constant16,
     vec_$iadd_mult_constant16_i.
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