Class: RubyHDL::High::Select

Inherits:
Expression show all
Defined in:
lib/HDLRuby/std/sequencer_sw.rb

Overview

Describes the software implementation of an select operation.

Instance Attribute Summary

Attributes inherited from Expression

#type

Instance Method Summary collapse

Methods inherited from Expression

#<=, #[], #mux, #sdownto, #seach, #stimes, #supto, #to_expr, #to_value

Constructor Details

#initialize(type, operator, sel, *choices) ⇒ Select

Create a new select operation with +type+ data type, selection operand +sel+ and possible choices +choices+.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 1993

def initialize(type,operator,sel,*choices)
  super(type)
  @sel = sel.to_expr
  @choices = choices.map(&:to_expr)
end

Instance Method Details

#to_c ⇒ Object

Convert to C code.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 2008

def to_c
  # return "switch(#{@sel.to_c}) {\n" +
  #   @choices.map.with_index do |choice,i|
  #     "case #{i}:\n#{choice.to_c}\nbreak;"
  #   end.join("\n") + "\n}"
  return "#{@sel.to_c} ? #{@choices[1].to_c} : #{@choices[0].to_c}"
end

#to_ruby ⇒ Object

Convert to Ruby code.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 2000

def to_ruby
  return "case(#{@sel.to_ruby}) ; " +
    @choices.map.with_index do |choice,i|
      "when #{i} ; #{choice.to_ruby} ; "
    end.join + "end"
end