VMS Help RTL Routines, LIB$, LIB$POLYH  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    On OpenVMS VAX systems, the Evaluate Polynomials routine (H-
    floating values) allows higher-level language users to evaluate
    H-floating value polynomials.

    This routine is not available to native OpenVMS Alpha programs
    but is available to translated VAX images.

    Format

      LIB$POLYH  polynomial-argument ,degree ,coefficient

                 ,floating-point-result

1 - Returns

    OpenVMS usage:cond_value
    type:         longword (unsigned)
    access:       write only
    mechanism:    by value

2 - Arguments

 polynomial-argument

    OpenVMS usage:floating_point
    type:         H_floating
    access:       read only
    mechanism:    by reference

    Argument for the polynomial. The polynomial-argument argument
    is the address of a floating-point number that contains this
    argument. The polynomial-argument argument is an H-floating
    number.

 degree

    OpenVMS usage:word_signed
    type:         word integer (signed)
    access:       read only
    mechanism:    by reference

    Highest-numbered nonzero coefficient to participate in the
    evaluation. The degree argument is the address of a signed word
    integer that contains this highest-numbered coefficient.

    If the degree is 0, the result equals C[0]. The range of the
    degree is 0 to 31.

 coefficient

    OpenVMS usage:floating_point
    type:         H_floating
    access:       read only
    mechanism:    by reference, array reference

    Floating-point coefficients. The coefficient argument is
    the address of an array of floating-point coefficients. The
    coefficient of the highest-order term of the polynomial is the
    lowest addressed element in the array. The coefficient argument
    is an array of H-floating numbers.

 floating-point-result

    OpenVMS usage:floating_point
    type:         H_floating
    access:       write only
    mechanism:    by reference

    Result of the calculation. The floating-point-result argument is
    the address of a floating-point number that contains this result.
    LIB$POLYH writes the address of floating-point-result into an
    H-floating number.

    Intermediate multiplications are carried out using extended
    floating-point fractions (127 bits for POLYH).