Module: OrigenTesters::VectorGenerator

Extended by:
ActiveSupport::Concern
Included in:
VectorBasedTester
Defined in:
lib/origen_testers/vector_generator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#compress ⇒ Object

Returns the value of attribute compress.



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# File 'lib/origen_testers/vector_generator.rb', line 13

def compress
  @compress
end

#expand_repeats ⇒ Object

Returns the value of attribute expand_repeats.



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# File 'lib/origen_testers/vector_generator.rb', line 14

def expand_repeats
  @expand_repeats
end

#vector_comments ⇒ Object

When set to true vector and cycle number comments will be appended to pattern vectors. This can also be enabled by running the generate command with the '-v' switch.



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# File 'lib/origen_testers/vector_generator.rb', line 12

def vector_comments
  @vector_comments
end

Instance Method Details

#_render(method) ⇒ Object

:nodoc:



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# File 'lib/origen_testers/vector_generator.rb', line 168

def _render(method)  # :nodoc:
  if self.respond_to?(method)
    template = send(method)
    # Record the current file, this can be used to resolve any relative path
    # references in the file about to be compiled
    Origen.file_handler.current_file = template
    # Ran into crosstalk problems when rendering ERB templates recursively, setting eoutvar based
    # on the name of the file will causes each template to be rendered into its own 'bank'.
    # Not sure why the final gsub is needed but seems to fail to parse correctly otherwise.
    eoutvar = Pathname.new(template).basename('.*').basename('.*').to_s.gsub('-', '_')
    # Make the file name available to the template
    Origen.generator.compiler.options[:file] = template
    push_microcode Origen.generator.compiler.insert(ERB.new(File.read(template.to_s), 0, Origen.config.erb_trim_mode, eoutvar).result)
  end
end

#add_microcode_to_last_or_cycle(code) ⇒ Object

Adds the given microcode to the last vector if possible. If not possible (meaning the vector already contains microcode) then a new cycle will be added with the given microcode.



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# File 'lib/origen_testers/vector_generator.rb', line 271

def add_microcode_to_last_or_cycle(code)
  cycle if !stage.last_vector || stage.last_vector.has_microcode?
  stage.last_vector.update(microcode: code)
end

#align ⇒ Object Also known as: align_to_first

Duplicate the last vector as required until aligned with the start of the next vector group



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# File 'lib/origen_testers/vector_generator.rb', line 39

def align
  stage.store :align
end

#align_to_last ⇒ Object

Duplicate the last vector as required until aligned to the last vector of the current vector group



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# File 'lib/origen_testers/vector_generator.rb', line 46

def align_to_last
  stage.store :align_last
end

#before_write_pattern_line(line) ⇒ Object

Tester models can overwrite this if they wish to inject any additional pattern lines at final pattern dump time



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# File 'lib/origen_testers/vector_generator.rb', line 317

def before_write_pattern_line(line)
  [line]
end

#current_pin_vals ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 536

def current_pin_vals
  ordered_pins_cache.map(&:to_vector).join(' ')
end

#cycle_count ⇒ Object

Returns the current cycle count



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# File 'lib/origen_testers/vector_generator.rb', line 74

def cycle_count
  @cycle_count ||= 0
end

#dec_vec_count(num = 1) ⇒ Object

decrement vector count



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# File 'lib/origen_testers/vector_generator.rb', line 68

def dec_vec_count(num = 1)
  vec_count if @vec_count.nil?  # define if not already
  @vec_count = @vec_count - num
end

#dont_compress ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 325

def dont_compress
  if block_given?
    orig = @dont_compress
    @dont_compress = true
    yield
    @dont_compress = orig
  else
    @dont_compress
  end
end

#dont_compress=(val) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 336

def dont_compress=(val)
  @dont_compress = val
end

#execution_time_in_ns ⇒ Object

Returns the current execution time



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# File 'lib/origen_testers/vector_generator.rb', line 79

def execution_time_in_ns
  @execution_time_in_ns ||= 0
end

#expand_vector(vec) ⇒ Object

expands (un-compresses to pattern) vector if desired or leaves it as is allows for tracking and formatting of vector if comment then return without modification



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# File 'lib/origen_testers/vector_generator.rb', line 343

def expand_vector(vec)
  if vec.is_a?(Vector)
    if expand_repeats
      vec.repeat.times do
        vec.repeat = 1
        yield track_and_format_vector(vec)
      end
    else
      yield track_and_format_vector(vec)
    end
  else
    yield track_and_format_comment(vec)  # Return comments without modification
  end
end

#format(vector_array, section) ⇒ Object

Final pass of a generator vector array which returns lines suitable for writing to the output file. This gives the tester model a chance to concatenate repeats and any other last optimization/formatting changes it wishes to make.

At this point vector array contains a combination of non-vector lines and uncompressed Vector objects (vector lines)



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# File 'lib/origen_testers/vector_generator.rb', line 283

def format(vector_array, section)
  tester_writing_pattern = respond_to?(:open_and_write_pattern)
  # Go through vector_array and print out both
  # vectors and non-vectors to pattern (via 'yield line')
  vector_array.each do |vec|
    # skip here important for the ways delays are currently handled
    # TODO: This seems like an upstream bug that should be investigated, why is such
    # a vector even generated?
    if vec.is_a?(String)
      if vec.strip[0] == comment_char
        pipeline.push_comment(vec)
      else
        pipeline.push_microcode(vec)
      end
    else
      next if vec.respond_to?(:repeat) && vec.repeat == 0 # skip vectors with repeat of 0!
      pipeline << vec
    end
    pipeline.flush do |vector|
      expand_vector(vector) do |line|
        yield line unless tester_writing_pattern
      end
    end
  end
  # now flush buffer if there is still a vector
  pipeline.empty(min_vectors: section == :footer ? @min_pattern_vectors : nil) do |vector|
    expand_vector(vector) do |line|
      yield line unless tester_writing_pattern
    end
  end
end

#format_pin_state(pin) ⇒ Object

See Also:

  • Origen::Pins::Pin#to_vector


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# File 'lib/origen_testers/vector_generator.rb', line 634

def format_pin_state(pin)
  if pin.repeat_previous? && @support_repeat_previous
    @repeat_previous || '-'
  elsif pin.driving?
    if pin.value == 1
      if pin.high_voltage?
        @drive_very_hi_state || '2'
      else
        @drive_hi_state || '1'
      end
    else
      @drive_lo_state || '0'
    end
  elsif pin.comparing_midband?
    @expect_mid_state || 'M'
  elsif pin.comparing?
    if pin.value == 1
      @expect_hi_state || 'H'
    else
      @expect_lo_state || 'L'
    end
  elsif pin.driving_mem?
    @drive_mem_state || 'D'
  elsif pin.comparing_mem?
    @expect_mem_state || 'E'
  elsif pin.to_be_captured?
    @capture_state || 'C'
  else
    @dont_care_state || 'X'
  end
end

#format_vector(vec) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 386

def format_vector(vec)
end

#get_pingroup(pin) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 598

def get_pingroup(pin)
  pingroup_map.each do |id, pins|
    return id if pins.include? pin
  end
  nil
end

#inc_cycle_count(num = 1, options = {}) ⇒ Object

increment cycle count



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# File 'lib/origen_testers/vector_generator.rb', line 84

def inc_cycle_count(num = 1, options = {})
  num, options = 1, num if num.is_a?(Hash)
  cycle_count if @cycle_count.nil? # define if not already
  execution_time_in_ns if @execution_time_in_ns.nil? # define if not already
  @execution_time_in_ns += num * (options[:period_in_ns] || tester.timeset.period_in_ns)
  @cycle_count = @cycle_count + num
end

#inc_vec_count(num = 1) ⇒ Object

increment vector count



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# File 'lib/origen_testers/vector_generator.rb', line 62

def inc_vec_count(num = 1)
  vec_count if @vec_count.nil?  # define if not already
  @vec_count = @vec_count + num
end

#inhibit_pin(*pins) ⇒ Object Also known as: inhibit_pins

Call to prevent the given pins from appearing in the generated vectors.

This is a convenient way to inhibit something like a J750 mux pin from appearing in the patterns when generating the pattern for a different platform.

When used this method must be called before the first vector is generated - it will not be retrospectively applied to existing vectors.



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# File 'lib/origen_testers/vector_generator.rb', line 108

def inhibit_pin(*pins)
  pins.each do |pin|
    pin = $dut.pin(pin) if pin.is_a?(Symbol)
    inhibited_pins << pin
  end
  inhibited_pins.uniq!
  inhibited_pins.compact!
  inhibited_pins
end

#inhibited_pins ⇒ Object

Returns an array of pin IDs that are currently inhibited (will not be included when vectors are generated)



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# File 'lib/origen_testers/vector_generator.rb', line 52

def inhibited_pins
  @inhibited_pins ||= []
end

#last_object(offset = 0) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 208

def last_object(offset = 0)
  stage.last_object(offset)
end

#last_vector(offset = 0) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 204

def last_vector(offset = 0)
  stage.last_vector(offset)
end

#microcode(code, options = {}) ⇒ Object Also known as: push_microcode 



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# File 'lib/origen_testers/vector_generator.rb', line 193

def microcode(code, options = {})
  unless @inhibit_vectors
    if options[:offset] && options[:offset] != 0
      stage.insert_from_end code, options[:offset]
    else
      stage.store code
    end
  end
end

#ordered_pins(options = {}) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 408

def ordered_pins(options = {})
  options = {
    include_inhibited_pins: false,
    include_pingroups:      true
  }.merge(options)

  result = nil

  Origen.profile 'Working out pin pattern order' do
    pinorder = Origen.app.pin_pattern_order.dup
    pinexclude = Origen.app.pin_pattern_exclude.dup

    if Origen.app.pin_pattern_order.last.is_a?(Hash)
      options.merge!(pinorder.pop)
    end
    if Origen.app.pin_pattern_exclude.last.is_a?(Hash)
      options.merge!(pinexclude.pop)
    end

    ordered_pins = []

    # Create a copy of all pins and groups to be output, pins/groups will be delete from here as
    # they are output, so that at the end of the user defined pin order what is left in here can
    # either be discarded or output at the end
    pins = Origen.pin_bank.pins.dup
    pingroups = Origen.pin_bank.pin_groups.dup

    if pinorder && pinorder.size > 0
      pinorder.each do |id|
        # If the ID refers to a pin group
        if group = Origen.pin_bank.pin_groups[id]
          # If the group has still to be output just do that now
          if pingroups.include? group.id
            ordered_pins << group
            # Now delete the group from the list of groups still to be output and all of its pins
            # from the list pins still to be output
            group.each do |pin|
              pins.delete(pin.id)
              pin.groups.each do |name, _group|
                pingroups.delete(name)
              end
            end
            pingroups.delete(group.id)
          # To get here the some of the pins in the group have already been output which is preventing
          # output of the complete group at this point, in that case output any of its pins that have
          # still to go
          else
            group.each do |pin|
              if pins.include? pin.id
                ordered_pins << pin
                pin.groups.each do |name, _group|
                  pingroups.delete(name)
                end
              end
            end
          end
        # this is a pin
        else
          pin = Origen.pin_bank.find(id)
          fail "Undefined pin (#{id}) added to pin_pattern_order" unless pin
          ordered_pins << pin
          pin.groups.each do |name, _group|
            pingroups.delete(name)
          end
          pin.name = id
          pins.delete(pin.id)
        end
      end
    end

    if pinexclude && pinexclude.size > 0
      pinexclude.each do |id|
        if group = Origen.pin_bank.pin_groups[id]
          # see if group is already in ordered_pins
          fail "Pin group #{id} is defined both in pin_pattern_order and pin_pattern_exclude" unless pingroups.include? id
          # this is a pin group, delete all pins in group
          pingroups.delete(id)
          group.each do |pin|
            fail "Pin (#{pin.name}) in group (#{group.id}) is defined both in pin_pattern_order and pin_pattern_exclude" unless pins.include? pin.id
            pins.delete(pin.id)
          end
        else # this is a pin, delete the pin
          pin = Origen.pin_bank.find(id)
          fail "Undefined pin (#{id}) added to pin_pattern_exclude" unless pin
          fail "Pin #{pin.name} is defined both in pin_pattern_order and pin_pattern_exclude" unless pins.include? pin.id
          pin.name = id
          pins.delete(pin.id)
          pin.groups.each do |name, _group|
            pingroups.delete(name)
          end
        end
      end
    end

    unless options[:only]
      # all the rest of the pins to the end of the pattern order
      pins.each do |_id, pin|
        # check for port
        if pin.belongs_to_a_pin_group?
          # Are any of this pin's groups still waiting to be output? pingroups at this point contains
          # those groups which have not been rendered yet
          group = pingroups.find do |_id, group|
            pin.groups.any? { |_pid, pgroup| group == pgroup }
          end
          if group
            ordered_pins << group[1]
            group[1].each { |pin| pins.delete(pin.id) }
          else
            ordered_pins << pin
          end
        else
          ordered_pins << pin
        end
      end
    end

    result = ordered_pins.map do |pin|
      if options[:include_inhibited_pins]
        pin
      else
        inhibited_pins.include?(pin) ? nil : pin
      end
    end
    result = result.compact
  end
  result
end

#ordered_pins_cache(options = {}) ⇒ Object

Cache any pin ordering for later use since all vectors should be formatted the same



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# File 'lib/origen_testers/vector_generator.rb', line 394

def ordered_pins_cache(options = {})
  @ordered_pins_cache ||= ordered_pins(options)
end

#ordered_pins_name ⇒ Object

Retrieve optional 'name' meta passed in with the pin_pattern_order call



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# File 'lib/origen_testers/vector_generator.rb', line 399

def ordered_pins_name
  pinorder = Origen.app.pin_pattern_order.dup
  if Origen.app.pin_pattern_order.last.is_a?(Hash)
    options = pinorder.pop
    name = options[:name]
  end
  name
end

#pingroup_map ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 389

def pingroup_map
  Origen.app.pingroup_map
end

#pipeline ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 321

def pipeline
  @pipeline ||= VectorPipeline.new(vector_group_size)
end

#preset_next_vector(attrs = {}, &block) ⇒ Object

Allows the attributes for the next vector to be setup prior to generating it.

A block can be optionally supplied to act as a clean up method, that is the block will be saved and executed after the next cycle has been generated.

See the V93K store_next_cycle method for an example of using this.



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# File 'lib/origen_testers/vector_generator.rb', line 221

def preset_next_vector(attrs = {}, &block)
  @preset_next_vector = attrs
  @preset_next_vector_cleanup = block
end

#push_comment(msg) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 188

def push_comment(msg)
  # Comments are stored verbatim for now, can't see much use for a dedicated comment object
  stage.store msg unless @inhibit_comments
end

#push_vector(attrs = {}) ⇒ Object Also known as: vector

Called by every $tester.cycle command to push a vector to the stage object



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# File 'lib/origen_testers/vector_generator.rb', line 227

def push_vector(attrs = {})
  attrs = {
    dont_compress: @dont_compress
  }.merge(attrs)
  unless @inhibit_vectors
    if @preset_next_vector
      attrs = @preset_next_vector.merge(attrs) do |key, preset, current|
        if preset && current && current != ''
          fail "Value for #{key} set by preset_next_vector clashed with the next vector!"
        else
          preset || current
        end
      end
      @preset_next_vector = nil
    end
    v = Vector.new(attrs)
    stage.store Vector.new(attrs)
    inc_vec_count
    inc_cycle_count(attrs[:repeat] || 1, period_in_ns: v.timeset.period_in_ns)
    if @preset_next_vector_cleanup
      @preset_next_vector_cleanup.call(v)
      @preset_next_vector_cleanup = nil
    end
  end
end

#regex_for_pin(pin) ⇒ Object

Returns a regular expression that can be used to get the value of the given pin within the string returned by current_pin_vals.

str = $tester.current_pin_vals                  # => "1 1 XX10 H X1"
regex = $tester.regex_for_pin($dut.pins(:jtag)) # => /\w{1} \w{1} (\w{4}) \w{1} \w{2}/
regex.match(str)
Regexp.last_match(1)   # => "XX10"

See Also:



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# File 'lib/origen_testers/vector_generator.rb', line 548

def regex_for_pin(pin)
  @regex_for_pins ||= {}
  # Cache this as potentially called many times during pattern generation
  @regex_for_pins[pin] ||= begin
    regex = '/'
    ordered_pins_cache.each do |p|
      if pin == p
        regex += "(\\w{#{p.size}}) "
      else
        regex += "\\w{#{p.size}} "
      end
    end
    eval(regex.strip + '/')
  end
end

#regex_for_pin_sub(pin) ⇒ Object

Returns a regular expression that can be used to change the value of the given pin within the string returned by current_pin_vals.

str = $tester.current_pin_vals                      # => "1 1 XX10 H X1"
regex = $tester.regex_for_pin_sub($dut.pins(:jtag)) # => /(\w{1} \w{1} )(\w{4})( \w{1} \w{2})/
str.sub(regex, '\1LLLL\3')  # => "1 1 LLLL H X1"

See Also:



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# File 'lib/origen_testers/vector_generator.rb', line 571

def regex_for_pin_sub(pin)
  @regex_for_pin_subs ||= {}
  # Cache this as potentially called many times during pattern generation
  @regex_for_pin_subs[pin] ||= begin
    regex = '/'
    first_pin_done = false
    match_pin_done = false
    ordered_pins_cache.each do |p|
      if pin == p
        regex += ')' if first_pin_done
        regex += "(\\w{#{p.size}})( "
      else
        regex += '(' unless first_pin_done
        regex += "\\w{#{p.size}} "
      end
      first_pin_done = true
    end
    regex.strip!
    if regex[-1] == '('
      regex.chop!
    else
      regex += ')'
    end
    eval(regex + '/')
  end
end

#remove_store_from_vector(vector) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/origen_testers/vector_generator.rb', line 667

def remove_store_from_vector(vector)
  vector.pin_vals.sub!('C', 'X')
end

#render(template, options = {}) ⇒ Object

Render content directly into a pattern, any options will be passed to the template



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# File 'lib/origen_testers/vector_generator.rb', line 120

def render(template, options = {})
  # Record the current file, this can be used to resolve any relative path
  # references in the file about to be compiled
  Origen.file_handler.current_file = template
  # Ran into crosstalk problems when rendering ERB templates recursively, setting eoutvar based
  # on the name of the file will causes each template to be rendered into its own 'bank'.
  # Not sure why the final gsub is needed but seems to fail to parse correctly otherwise.
  eoutvar = Pathname.new(template).basename('.*').basename('.*').to_s.gsub('-', '_')
  # Make the file name available to the template
  Origen.generator.compiler.options[:file] = template
  options.each { |k, v| Origen.generator.compiler.options[k] = v }
  code = Origen.generator.compiler.insert(ERB.new(File.read(template.to_s), 0, Origen.config.erb_trim_mode, eoutvar).result)
  code.strip!
  push_microcode code
end

#render_body ⇒ Object

Same as the render method, except the template method should be called body_template.



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# File 'lib/origen_testers/vector_generator.rb', line 146

def render_body
  _render(:body_template)
end

#render_footer ⇒ Object

If the tester defines a method named footer_template this method will compile whatever template file is returned by that method.

This method is called automatically during the footer section of a Pattern.create operation.



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# File 'lib/origen_testers/vector_generator.rb', line 155

def render_footer
  _render(:footer_template)
end

#render_header ⇒ Object

If the tester defines a method named header_template this method will compile whatever template file is returned by that method.

This method is called automatically during the header section of a Pattern.create operation.



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# File 'lib/origen_testers/vector_generator.rb', line 164

def render_header
  _render(:header_template)
end

#render_template ⇒ Object

If the tester defines a method named template this method will compile whatever template file is returned by that method.

This method is called automatically after the body section of a Pattern.create operation has completed.



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# File 'lib/origen_testers/vector_generator.rb', line 141

def render_template
  _render(:template)
end

#reset_cycle_count(num = 0) ⇒ Object

reset_cycle_count



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# File 'lib/origen_testers/vector_generator.rb', line 93

def reset_cycle_count(num = 0)
  cycle_count if @cycle_count.nil? # define if not already
  @execution_time_in_ns = 0
  @cycle_count = num
end

#stage ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 184

def stage
  Origen.generator.stage
end

#track_and_format_comment(comment) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 358

def track_and_format_comment(comment)
  comment
end

#track_and_format_vector(vec) ⇒ Object

Update tracking info (stats object) and allow for any additional formatting via format_vector method if overridden



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# File 'lib/origen_testers/vector_generator.rb', line 365

def track_and_format_vector(vec)
  unless vec.timeset
    puts 'No timeset defined!'
    puts 'Add one to your top level startup method or target like this:'
    puts '$tester.set_timeset("nvmbist", 40)   # Where 40 is the period in ns'
    exit 1
  end
  stats = Origen.app.stats
  stats.add_vector
  if vector_group_size > 1 && vec.repeat > 1
    stats.add_cycle(1)
    stats.add_cycle((vec.repeat - 1) * vector_group_size)
    stats.add_time_in_ns(vec.timeset.period_in_ns)
    stats.add_time_in_ns((vec.repeat - 1) * vector_group_size * vec.timeset.period_in_ns)
  else
    stats.add_cycle(vec.repeat)
    stats.add_time_in_ns(vec.repeat * vec.timeset.period_in_ns)
  end
  format_vector(vec)
end

#update_pin_from_formatted_state(pin, state) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 605

def update_pin_from_formatted_state(pin, state)
  if state == @repeat_previous || state == '-'
    pin.repeat_previous = true
  elsif state == @drive_very_hi_state || state == '2'
    pin.drive_very_hi
  elsif state == @drive_hi_state || state == '1'
    pin.drive_hi
  elsif state == @drive_lo_state || state == '0'
    pin.drive_lo
  elsif state == @expect_hi_state || state == 'H'
    pin.expect_hi
  elsif state == @expect_lo_state || state == 'L'
    pin.expect_lo
  elsif state == @expect_mid_state || state == 'M'
    pin.expect_mid
  elsif state == @drive_mem_state || state == 'D'
    pin.drive_mem
  elsif state == @expect_mem_state || state == 'E'
    pin.expect_mem
  elsif state == @capture_state || state == 'C'
    pin.capture
  elsif state == @dont_care_state || state == 'X'
    pin.dont_care
  else
    fail "Unknown pin state: #{state}"
  end
end

#update_vector(attrs = {}) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 254

def update_vector(attrs = {})
  unless @inhibit_vectors
    offset = (attrs.delete(:offset) || 0).abs
    stage.last_vector(offset).update(attrs)
  end
end

#update_vector_pin_val(pin, options = {}) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 261

def update_vector_pin_val(pin, options = {})
  unless @inhibit_vectors
    offset = (options.delete(:offset) || 0).abs
    stage.last_vector(offset).update_pin_val(pin)
  end
end

#vec_count ⇒ Object

init vector count when first accessed, otherwise return value



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# File 'lib/origen_testers/vector_generator.rb', line 57

def vec_count
  @vec_count ||= 0
end

#vector_group_size ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 17

def vector_group_size
  @vector_group_size || 1
end

#vector_group_size=(number) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 21

def vector_group_size=(number)
  if number > 1 && number.odd?
    fail 'Only even numbers can be supplied for the vector_group_size!'
  end
  # Each pattern should run with its own tester instance, but just in case
  @pipeline = nil
  @vector_group_size = number
end

#with_vector_group_size(number) ⇒ Object 



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# File 'lib/origen_testers/vector_generator.rb', line 30

def with_vector_group_size(number)
  orig = vector_group_size
  self.vector_group_size = number
  yield
  self.vector_group_size = orig
end