Class: Origen::Netlist::List

Inherits:
Object
  • Object
show all
Defined in:
lib/origen/netlist/list.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(top_level) ⇒ List

Returns a new instance of List.



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# File 'lib/origen/netlist/list.rb', line 9

def initialize(top_level)
  @top_level = top_level
  @table = {}
end

Instance Attribute Details

#table ⇒ Object (readonly)

Returns the value of attribute table.



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# File 'lib/origen/netlist/list.rb', line 4

def table
  @table
end

#top_level ⇒ Object (readonly) Also known as: parent, owner

Returns the value of attribute top_level.



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# File 'lib/origen/netlist/list.rb', line 4

def top_level
  @top_level
end

Instance Method Details

#connect(a, b = nil, &block) ⇒ Object

Connect two paths together in the netlist, one can be a numeric value to represent a logic level connection



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# File 'lib/origen/netlist/list.rb', line 16

def connect(a, b = nil, &block)
  b ||= block
  align(a, b) do |path, index, target|
    table[path] ||= {}
    table[path][index] ||= []
    table[path][index] << target
  end
end

#data_bit(path, index, options = {}) ⇒ Object 



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# File 'lib/origen/netlist/list.rb', line 25

def data_bit(path, index, options = {})
  bits = data_bits(path, index, options)
  if bits.size > 1
    fail "Multiple data bit connections found for node #{path}[#{index}]"
  elsif bits.size == 0
    return undefined
  end
  bits.first
end

#data_bits(path, index, options = {}) ⇒ Object 



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# File 'lib/origen/netlist/list.rb', line 35

def data_bits(path, index, options = {})
  processed_paths = options[:processed_paths] || []
  bits = []
  ['*', index].each do |i|
    unless processed_paths.include?("#{path}[#{i}]")
      processed_paths << "#{path}[#{i}]"
      vals = (table[path] || {})[i] || []
      # Also consider anything attached directly to the requested path, e.g. a
      # drive value applied to a port
      vals << "#{path}[#{i}]" if i != '*' && !options[:sublevel]
      vals.each do |val|
        if val.is_a?(Proc)
          from_proc = true
          val = val.call(index)
        else
          from_proc = false
        end
        if val.is_a?(Integer)
          bits << Registers::Bit.new(nil, index, access: :ro, data: (i == '*' && !from_proc) ? val[index] : val)
        elsif val
          vp, vi = *to_v(val)
          bc = eval("top_level.#{vp}[#{vi || index}]")
          if bc.is_a?(Registers::BitCollection)
            bits << bc.bit
          elsif bc.is_a?(Ports::Section) && bc.drive_value
            bits << Registers::Bit.new(nil, index, access: :ro, data: bc.drive_value)
          else
            bits += data_bits(vp, vi || index, processed_paths: processed_paths, sublevel: true) || []
          end
        end
      end
    end
  end
  bits.uniq
end