#! ruby

=begin RUBY_COMMENT

Copyright (C) 2001-2003, Parrot Foundation.

=head1 NAME

examples/mops/mops.c - Calculate M ops/s

=head1 SYNOPSIS

    % ruby examples/mops/mops.rb

=head1 DESCRIPTION

A Ruby implementation of the F<examples/mops/mops.pasm> example program,
for speed comparisons.

Calculates a value for M ops/s (million operations per second) using
integer arithmetic.

Prints out:

=over 4

=item * the number of look iterations, 

=item * the estimated number of ops performed,

=item * the elapsed time, and 

=item * the number of M op/s.

=back

=cut

=end RUBY_COMMENT

i2 = 0                       # set    I2, 0
i3 = 1                       # set    I3, 1
i4 = 10000000                # set    I4, 10000000
                             #
puts "Iterations:    #{i4}"  # print  "Iterations:    "
                             # print  I4
                             # print  "\n"
                             #
i1 = 2                       # set    I1, 2
i5 = i4 * i1                 # mul    I5, I4, I1
                             #
puts "Estimated ops: #{i5}"  # print  "Estimated ops: "
                             # print  I5
                             # print  "\n"
                             #
n1 = Time.now()              # time N1
                             #
while i4 != 0                # REDO:
  i4 = i4 - i3               # sub    I4, I4, I3
end                          # if     I4, REDO
                             #
                             # DONE:
n5 = Time.now()              # time   N5
                             #
n2 = n5 - n1                 # sub    N2, N5, N1
                             #
puts "Elapsed time:  #{n2}"  # print  "Elapsed time:  "
                             # print  N2
                             # print  "\n"
                             #
n1 = i5                      # iton   N1, I5
n1 = n1 / n2                 # div    N1, N1, N2
n2 = 1000000.0               # set    N2, 1000000.0
n1 = n1 / n2                 # div    N1, N1, N2
                             #
puts "M op/s:        #{n1}"  # print  "M op/s:        "
                             # print  N1
                             # print  "\n"
                             #
exit(0)                      # end

=begin RUBY_COMMENT

=head1 SEE ALSO

F<examples/benchmarks/mops.pasm>,
F<examples/mops/mops.c>,
F<examples/mops/mops.cs>,
F<examples/mops/mops.il>,
F<examples/mops/mops.p6>,
F<examples/mops/mops.pl>,
F<examples/mops/mops.ps>,
F<examples/mops/mops.py>,
F<examples/mops/mops.scheme>.

=cut

=end RUBY_COMMENT
