Class: HDLRuby::Viz::IC

Inherits:
Object
  • Object
show all
Defined in:
lib/HDLRuby/hruby_viz.rb

Overview

An IC block

Defined Under Namespace

Classes: Route, Tile

Constant Summary collapse

EPSILON = 
0.01

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, type, parent = nil, system = nil) ⇒ IC

Returns a new instance of IC.



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# File 'lib/HDLRuby/hruby_viz.rb', line 54

def initialize(name, type, parent = nil, system = nil)
  @name = name.to_s
  @type = type.to_sym
  @parent = parent
  @parent.children << self if @parent
  @system = system
  @children = []
  @branches = []
  @ports = []
  @lports = []; @uports = []; @rports = []; @dports = []
  @xpos   = 0
  @ypos   = 0
  @width  = 0      # Width in number of routes
  @height = 0      # Height in number of routes
  @matrix   = [[]] # The matrix separting the children
  @retries = 100   # Number of resize of matrix and retry of route.
  @rheigths = []   # The heights of each in number of routes
  @cwidths  = []   # The widths of each column in number of routes
  # @border   = 2    # The IC border size for routing to external ports.
  @border   =  4   # The IC border size for routing to external ports.
  @cell_border = 4 # The cell border size
  @routes   = []   # The connection routes.
  @port_width = 3  # The width in tiles for a port
  @scale = 1.0     # The scale for SVG generation
end

Instance Attribute Details

#box ⇒ Object (readonly)

Returns the value of attribute box.



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# File 'lib/HDLRuby/hruby_viz.rb', line 45

def box
  @box
end

#branches ⇒ Object (readonly)

Returns the value of attribute branches.



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# File 'lib/HDLRuby/hruby_viz.rb', line 42

def branches
  @branches
end

#children ⇒ Object (readonly)

Returns the value of attribute children.



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# File 'lib/HDLRuby/hruby_viz.rb', line 42

def children
  @children
end

#cwidths ⇒ Object (readonly)

Returns the value of attribute cwidths.



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# File 'lib/HDLRuby/hruby_viz.rb', line 46

def cwidths
  @cwidths
end

#dports ⇒ Object (readonly)

Returns the value of attribute dports.



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# File 'lib/HDLRuby/hruby_viz.rb', line 43

def dports
  @dports
end

#height ⇒ Object

Returns the value of attribute height.



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# File 'lib/HDLRuby/hruby_viz.rb', line 44

def height
  @height
end

#idC ⇒ Object (readonly)

Returns the value of attribute idC.



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# File 'lib/HDLRuby/hruby_viz.rb', line 2622

def idC
  @idC
end

#lports ⇒ Object (readonly)

Returns the value of attribute lports.



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# File 'lib/HDLRuby/hruby_viz.rb', line 43

def lports
  @lports
end

#matrix ⇒ Object (readonly)

Returns the value of attribute matrix.



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# File 'lib/HDLRuby/hruby_viz.rb', line 46

def matrix
  @matrix
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/HDLRuby/hruby_viz.rb', line 42

def name
  @name
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/HDLRuby/hruby_viz.rb', line 42

def parent
  @parent
end

#port_width ⇒ Object (readonly)

Returns the value of attribute port_width.



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# File 'lib/HDLRuby/hruby_viz.rb', line 49

def port_width
  @port_width
end

#ports ⇒ Object (readonly)

Returns the value of attribute ports.



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# File 'lib/HDLRuby/hruby_viz.rb', line 43

def ports
  @ports
end

#rheights ⇒ Object (readonly)

Returns the value of attribute rheights.



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# File 'lib/HDLRuby/hruby_viz.rb', line 46

def rheights
  @rheights
end

#route_height ⇒ Object (readonly)

Returns the value of attribute route_height.



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# File 'lib/HDLRuby/hruby_viz.rb', line 47

def route_height
  @route_height
end

#route_matrix ⇒ Object (readonly)

Returns the value of attribute route_matrix.



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# File 'lib/HDLRuby/hruby_viz.rb', line 47

def route_matrix
  @route_matrix
end

#route_width ⇒ Object (readonly)

Returns the value of attribute route_width.



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# File 'lib/HDLRuby/hruby_viz.rb', line 47

def route_width
  @route_width
end

#routes ⇒ Object (readonly)

Returns the value of attribute routes.



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# File 'lib/HDLRuby/hruby_viz.rb', line 48

def routes
  @routes
end

#rports ⇒ Object (readonly)

Returns the value of attribute rports.



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# File 'lib/HDLRuby/hruby_viz.rb', line 43

def rports
  @rports
end

#scale ⇒ Object

Returns the value of attribute scale.



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# File 'lib/HDLRuby/hruby_viz.rb', line 50

def scale
  @scale
end

#system ⇒ Object (readonly)

The instanciated system if it is an instance.



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# File 'lib/HDLRuby/hruby_viz.rb', line 52

def system
  @system
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/HDLRuby/hruby_viz.rb', line 42

def type
  @type
end

#uports ⇒ Object (readonly)

Returns the value of attribute uports.



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# File 'lib/HDLRuby/hruby_viz.rb', line 43

def uports
  @uports
end

#width ⇒ Object

Returns the value of attribute width.



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# File 'lib/HDLRuby/hruby_viz.rb', line 44

def width
  @width
end

#xpos ⇒ Object

Returns the value of attribute xpos.



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# File 'lib/HDLRuby/hruby_viz.rb', line 44

def xpos
  @xpos
end

#ypos ⇒ Object

Returns the value of attribute ypos.



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# File 'lib/HDLRuby/hruby_viz.rb', line 44

def ypos
  @ypos
end

Instance Method Details

#[](idx) ⇒ Object

Get a port by index.



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# File 'lib/HDLRuby/hruby_viz.rb', line 99

def [](idx)
  return @ports[idx]
end

#add_port(name, direction, type = :signal) ⇒ Object

Add a new port.



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# File 'lib/HDLRuby/hruby_viz.rb', line 86

def add_port(name,direction, type=:signal)
  port = Port.new(name,self,direction,type)
  @ports << port
  return port
end

#adjacents ⇒ Object

Get the adjacent IC



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# File 'lib/HDLRuby/hruby_viz.rb', line 145

def adjacents
  return @ports.map {|p| p.targets.map {|t| t.ic } }.flatten
end

#alu_svg(ic) ⇒ Object

Generate an ALU description SVG text for +ic+



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# File 'lib/HDLRuby/hruby_viz.rb', line 2376

def alu_svg(ic)
  id = Viz.to_svg_id(ic.name)
  # Determine the side of the inputs (and consequently of the outputs),
  # and the number of inputs.
  iside = LEFT # Default side: left
  inum = 0
  ic.ports.each do |port|
    if port.direction == :input then
      iside = port.side
      inum += 1
    end
  end
  # NOTE: inum is zero in case of a constant, force at least 1.
  inum = 1 if inum < 1
  # The length of a leg
  if iside == LEFT or iside == RIGHT then
    leg = ic.height / inum
  else
    leg = ic.width / inum
  end
  # Generate the resulting polygon.
  res = "<polygon id=\"#{id}\" fill=\"#eee\" stroke=\"#000\" " +
    "stroke-width=\"#{@scale/16.0}\" " +
    "points=\""
  # The result depends on the size of the input.
  case(iside)
  when LEFT
    # The left side
    res += "#{ic.xpos*@scale} #{(ic.ypos)*@scale} "
    (inum-1).times do |i|
      res += "#{(ic.xpos)*@scale} #{(ic.ypos+i*leg+0.25)*@scale} "
      res += "#{(ic.xpos)*@scale} #{(ic.ypos+(i+1)*leg-0.25)*@scale} "
      res += "#{(ic.xpos+0.25)*@scale} #{(ic.ypos+(i+1)*leg)*@scale} "
      res += "#{(ic.xpos)*@scale} #{(ic.ypos+(i+1)*leg+0.25)*@scale} "
    end
    res += "#{(ic.xpos)*@scale} #{(ic.ypos+inum*leg)*@scale} "
    # The up side
    # res += "#{(ic.xpos+ic.width)*@scale} #{(ic.ypos+inum*leg-1)*@scale} "
    res += "#{(ic.xpos+ic.width)*@scale} #{(ic.ypos+ic.height*0.7)*@scale} "
    # The right side.
    # res += "#{(ic.xpos+ic.width)*@scale} #{(ic.ypos+1)*@scale}"
    res += "#{(ic.xpos+ic.width)*@scale} #{(ic.ypos+ic.height*0.3)*@scale}"
    # The down side is not necessary, close the shape.
    res += "\"/>"
  when UP
    # The right side
    res += "#{(ic.xpos)*@scale} #{(ic.ypos+ic.height)*@scale} "
    (inum-1).times do |i|
      res += "#{(ic.xpos+i*leg+0.25)*@scale} #{(ic.ypos+ic.height)*@scale} "
      res += "#{(ic.xpos+(i+1)*leg-0.25)*@scale} #{(ic.ypos+ic.height)*@scale} "
      res += "#{(ic.xpos+(i+1)*leg)*@scale} #{(ic.ypos-0.25+ic.height)*@scale} "
      res += "#{(ic.xpos+(i+1)*leg+0.25)*@scale} #{(ic.ypos+ic.height)*@scale} "
    end
    res += "#{(ic.xpos+inum*leg)*@scale} #{(ic.ypos+ic.height)*@scale} "
    # The up side
    # res += "#{(ic.xpos+inum*leg-1)*@scale} #{(ic.ypos)*@scale} "
    res += "#{(ic.xpos+ic.width*0.7)*@scale} #{(ic.ypos)*@scale} "
    # The right side.
    # res += "#{(ic.xpos+1)*@scale} #{(ic.ypos)*@scale}"
    res += "#{(ic.xpos+ic.width*0.3)*@scale} #{(ic.ypos)*@scale}"
    # The down side is not necessary, close the shape.
    res += "\"/>"
  when RIGHT
    # The right side
    res += "#{(ic.xpos+ic.width)*@scale} #{(ic.ypos)*@scale} "
    (inum-1).times do |i|
      res += "#{(ic.xpos+ic.width)*@scale} #{(ic.ypos+i*leg+0.25)*@scale} "
      res += "#{(ic.xpos+ic.width)*@scale} #{(ic.ypos+(i+1)*leg-0.25)*@scale} "
      res += "#{(ic.xpos-0.25+ic.width)*@scale} #{(ic.ypos+(i+1)*leg)*@scale} "
      res += "#{(ic.xpos+ic.width)*@scale} #{(ic.ypos+(i+1)*leg+0.25)*@scale} "
    end
    res += "#{(ic.xpos+ic.width)*@scale} #{(ic.ypos+inum*leg)*@scale} "
    # The up side
    # res += "#{(ic.xpos)*@scale} #{(ic.ypos+inum*leg-1)*@scale} "
    res += "#{(ic.xpos)*@scale} #{(ic.ypos+ic.height*0.7)*@scale} "
    # The right side.
    # res += "#{(ic.xpos)*@scale} #{(ic.ypos+1)*@scale}"
    res += "#{(ic.xpos)*@scale} #{(ic.ypos+ic.height*0.3)*@scale}"
    # The down side is not necessary, close the shape.
    res += "\"/>"
  when DOWN
    # The down side
    res += "#{ic.xpos*@scale} #{(ic.ypos)*@scale} "
    (inum-1).times do |i|
      res += "#{(ic.xpos+i*leg+0.25)*@scale} #{(ic.ypos)*@scale} "
      res += "#{(ic.xpos+(i+1)*leg-0.25)*@scale} #{(ic.ypos)*@scale} "
      res += "#{(ic.xpos+(i+1)*leg)*@scale} #{(ic.ypos+0.25)*@scale} "
      res += "#{(ic.xpos+(i+1)*leg+0.25)*@scale} #{(ic.ypos)*@scale} "
    end
    res += "#{(ic.xpos+inum*leg)*@scale} #{(ic.ypos)*@scale} "
    # The up side
    # res += "#{(ic.xpos+inum*leg-1)*@scale} #{(ic.ypos+ic.height)*@scale} "
    res += "#{(ic.xpos+ic.width*0.7)*@scale} #{(ic.ypos+ic.height)*@scale} "
    # The right side.
    # res += "#{(ic.xpos+1)*@scale} #{(ic.ypos+ic.height)*@scale}"
    res += "#{(ic.xpos+ic.width*0.3)*@scale} #{(ic.ypos+ic.height)*@scale}"
    # The down side is not necessary, close the shape.
    res += "\"/>"
  else
    raise "Wrong side: #{iside}"
  end
  # Its name.
  # sy = (iside == UP || iside == DOWN) ? 0 : -0.5 # Shift to avoid ports
  sy = (iside == UP || iside == DOWN || inum.even?) ? 0 : -0.5 # Shift to avoid ports
  res += "<text id=\"text#{id}\" " +
    "style=\"text-anchor: middle; dominant-baseline: middle;\" " +
    "font-family=\"monospace\" font-size=\"1px\" " +
    "x=\"#{(ic.xpos + ic.width/2.0)*@scale}\" "+
    "y=\"#{(ic.ypos + ic.height/2.0 + sy)*@scale}\">" +
    ic.name + "</text>\n"
  # Its text resizing.
  res += Viz.svg_text_fit("text#{id}",(ic.width-0.6)*@scale,
                           0.6*@scale)
  return res
end

#bounding_children ⇒ Object

Compute the bounding box of the current placement.



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# File 'lib/HDLRuby/hruby_viz.rb', line 475

def bounding_children
  x0 = 1/0.0
  x1 = -1/0.0
  y0 = 1/0.0
  y1 = -1/0.0
  @children.each do |child|
    x0 = child.xpos if child.xpos < x0
    x1 = child.xpos+child.width if child.xpos+child.width > x1
    y0 = child.ypos if child.ypos < y0
    y1 = child.ypos+child.height if child.ypos+child.height > y1
  end
  @box = [x0,y0,x1,y1]
  return @box
end

#center_children ⇒ Object

Centers the global position of the current placement.



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# File 'lib/HDLRuby/hruby_viz.rb', line 491

def center_children
  x0,y0,x1,y1 = @box
  if x0 < x1 then
    dx = -x0 - (x1-x0) / 2.0
  else
    dx = -x1 - (x0-x1) / 2.0
  end
  if y0 < y1 then
    dy = -y0 - (y1-y0) / 2.0
  else
    dy = -y1 - (y0-y1) / 2.0
  end
  @children.each do |child| 
    child.xpos += dx
    child.ypos += dy
  end
end

#clocked_process_svg(ic) ⇒ Object

Generate a clocked process description SVG text for +ic+



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# File 'lib/HDLRuby/hruby_viz.rb', line 2261

def clocked_process_svg(ic)
  id = Viz.to_svg_id(ic.name)
  res = "<rect fill=\"#ddd\" stroke=\"#000\" " +
    "stroke-width=\"#{@scale/32.0}\" " +
    "x=\"#{(ic.xpos-1/16.0)*@scale}\" y=\"#{(ic.ypos-1/16.0)*@scale}\" " +
    "rx=\"#{(1+1/16.0)*@scale}\" " +
    "width=\"#{(ic.width+1/8.0)*@scale}\" "+
    "height=\"#{(ic.height+1/8.0)*@scale}\"/>\n"
  res += "<rect id=\"#{id}\" fill=\"#ddd\" stroke=\"#000\" " +
    "stroke-width=\"#{@scale/32.0}\" " +
    "x=\"#{ic.xpos*@scale}\" y=\"#{ic.ypos*@scale}\" " +
    "rx=\"#{@scale}\" " +
    "width=\"#{ic.width*@scale}\" "+
    "height=\"#{ic.height*@scale}\"/>\n"
  # Its name.
  sy = (ic.lports.size.even? and ic.rports.size.even? ) ? 0 : -0.5 # Shift to avoid ports
  res += "<text id=\"text#{id}\" " +
    "style=\"text-anchor: middle; dominant-baseline: middle;\" " +
    "font-family=\"monospace\" font-size=\"1px\" " +
    "x=\"#{(ic.xpos + ic.width/2.0)*@scale}\" "+
    "y=\"#{(ic.ypos + ic.height/2.0 + sy)*@scale}\">" +
    ic.name + "</text>\n"
  # Its text resizing.
  res += Viz.svg_text_fit("text#{id}",(ic.width-0.6)*@scale,
                           0.6*@scale)
  return res
end

#compress_route_tiles ⇒ Object

Compress the route matrix and update the position of the objects accordignly.



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# File 'lib/HDLRuby/hruby_viz.rb', line 1902

def compress_route_tiles
  # First record the position of each port of current IC for
  # easily updating their position.
  lports_row = []
  self.lports.each {|p| lports_row[p.ypos] = p }
  uports_col = []
  self.uports.each {|p| uports_col[p.xpos] = p }
  rports_row = []
  self.rports.each {|p| rports_row[p.ypos] = p }
  dports_col = []
  self.dports.each {|p| dports_col[p.xpos] = p }

  # Remove the route matrix lines whose tiles are empty or contain
  # vertical wires only.
  dh = 0 # Total height reduction.
  @route_matrix.size.times do |y|
    row = @route_matrix[y-dh]
    # puts "y=#{y} dh=#{dh} y-dh=#{y-dh}, @route_matrix.size=#{@route_matrix.size}"
    # Check if the row is a canditate for deletion.
    del = row.none? do |tile|
      tile && (tile.ic || tile.wires.any? {|d| d!=UP|DOWN } )
    end
    # But maybe some IC will touch is each other or the border if the
    # row is deleted,
    # we want to avoid it.
    if del then
      if y-dh == 0 then
        del = false if @route_matrix[y-dh+1].any? { |tile| tile.ic }
      elsif y-dh == @route_matrix.size - 1 then 
        del = false if @route_matrix[y-dh-1].any? { |tile| tile.ic }
      else
        del = false if row.size.times.any? do |x|
          @route_matrix[y-dh-1][x].ic and @route_matrix[y-dh+1][x].ic
        end
      end
    end
    # Delete the row if possible.
    if del then
      @route_matrix.delete_at(y-dh)
      # Update the current IC ports array rows.
      lports_row.delete_at(y-dh)
      rports_row.delete_at(y-dh)
      dh += 1
    end
  end
  # Remove the route matrix column whose tiles are empty or contain
  # horizontal wires only.
  dw = 0
  self.width.times do |x|
    del = @route_matrix.none? do |row|
      tile = row[x-dw]
      tile && (tile.ic || tile.wires.any? {|d| d!=LEFT|RIGHT } )
    end
    # But maybe some IC will touch is each other or the border if the
    # row is deleted,
    # we want to avoid it.
    if del then
      if x-dw == 0 then
        del = false if @route_matrix.any? { |row| row[x-dw+1].ic }
      elsif x-dw == @route_matrix[0].size - 1 then 
        del = false if @route_matrix.any? { |row| row[x-dw-1].ic }
      else
        del = false if @route_matrix.size.times.any? do |y|
          @route_matrix[y][x-dw-1].ic and @route_matrix[y][x-dw+1].ic
        end
      end
    end
    if del then
      # Remove the column.
      @route_matrix.each {|row| row.delete_at(x-dw) }
      # Update the current IC ports array columns.
      uports_col.delete_at(x-dw)
      dports_col.delete_at(x-dw)
      dw += 1
    end
  end

  # # Readd border if an ic is touching a border.
  # if @route_matrix.any? {|row| row[0] && row[0].ic } then
  #   # An IC touch the left border, add an empty colum.
  #   dw -= 1
  #   @route_matrix.each { |row| row.unshift(Tile.new) }
  # end
  # if @route_matrix.any? {|row| row[-1] && row[-1].ic } then
  #   # An IC touch the right border, add an empty column.
  #   dw -= 1
  #   @route_matrix.each { |row| row.push(Tile.new) }
  # end
  
  puts "Compressed tiles result: width -#{dw}, height -#{dh}"
  
  # Update the position of the IC and their ports according to the
  # new matrix. For that purpose, scan the matrix for left to right
  # and down to up update the position of the encountered tile's ic
  # when encountered first.
  fixed = Set.new
  @route_matrix.each_with_index do |row,y|
    row.each_with_index do |tile,x|
      # Check if there is an IC to process.
      next unless (tile and tile.ic and !fixed.include?(tile.ic))
      # Yes, update its own and its ports' positions.
      dx = x - tile.ic.xpos
      dy = y - tile.ic.ypos
      tile.ic.xpos += dx
      tile.ic.ypos += dy
      tile.ic.ports.each do |port|
        port.xpos += dx
        port.ypos += dy
      end
      # Tell it is already fixed.
      fixed.add(tile.ic)
    end
  end

  # Update the size of the current IC and the position of its ports.
  self.width -= dw
  self.height -= dh
  # Position with border (since the IC has been resized).
  self.rports.each { |port| port.xpos -= dw }
  self.uports.each { |port| port.ypos -= dh }
  # Position in border.
  lports_row.each_with_index { |port,y| port.ypos = y if port }
  uports_col.each_with_index { |port,x| port.xpos = x if port }
  rports_row.each_with_index { |port,y| port.ypos = y if port }
  dports_col.each_with_index { |port,x| port.xpos = x if port }
end

#connect(p0, p1) ⇒ Object

Connect two ports +p0+ and +p1+



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# File 'lib/HDLRuby/hruby_viz.rb', line 104

def connect(p0,p1)
  puts "connect #{p0.name} of #{p0.ic.name} to #{p1.name} of #{p1.ic.name}"
  p0.targets << p1
  p1.targets << p0
end

#connection_route(port0, port1) ⇒ Object

Route from +port0+ to +port1. NOTE: uses the A* algorithm with taxi cab distance.



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# File 'lib/HDLRuby/hruby_viz.rb', line 1648

def connection_route(port0,port1)
  puts "From port: #{port0.name} (ic: #{port0.ic.name}) " + "to port: #{port1.name} (ic: #{port1.ic.name})"

  pos0 = [port0.xpos,port0.ypos]
  pos1 = [port1.xpos,port1.ypos]
  oset = [pos0]
  # oset = Set.new
  oset << pos0
  from = { }
  # gscore = Hash.new(1/0.0)
  # gscore[pos0] = 0
  gscore = Array.new(@route_matrix.size) { Array.new(@route_matrix[0].size) { 1/0.0 } }
  gscore[pos0[1]][pos0[0]] = 0
  # fscore = Hash.new(1/0.0)
  # fscore[pos0] = taxi_distance(pos0,pos1)
  fscore = Array.new(@route_matrix.size) { [] }
  fscore[pos0[1]][pos0[0]] = taxi_distance(pos0,pos1)
  while oset.any? do
    # Pick the position from oset with the minimum fscore.
    cpos = nil          # Current position
    mscore = 1/0.0      # Minimum score
    # oset.each do |pos|
    #   # score = fscore[pos]
    #   score = fscore[pos[1]][pos[0]]
    #   if score < mscore then
    #     mscore = score
    #     cpos = pos
    #   end
    # end
    # The best score is necessily at the end of oset.
    cpos = oset.pop
    # puts "cpos=#{cpos}"
    if touch?(cpos,pos1) then
      # The goal is reached.
      from[pos1] = cpos
      return reconstruct_path(port0,port1,from,pos1)
    end
    # oset.delete(cpos) # No need anymore since pop
    # Get the neighbor positions for port.
    # poses = free_neighbors(port0,cpos)
    poses = free_neighbors(port0,port1,cpos)
    poses.each do |pos|
      # Try it.
      # tscore = gscore[cpos] + cost_position(port0,pos)
      tscore = gscore[cpos[1]][cpos[0]] + cost_position(port0,pos)
      # if tscore < gscore[pos] then
      if tscore < gscore[pos[1]][pos[0]] then
        # This path to neigbor is better than any previous one, keep it.
        from[pos]   = cpos
        # gscore[pos] = tscore
        gscore[pos[1]][pos[0]] = tscore
        # fscore[pos] = tscore + taxi_distance(pos,pos1)
        fscore[pos[1]][pos[0]] = tscore + taxi_distance(pos,pos1)
        # oset << pos unless oset.include?(pos)
        idx = oset.bsearch_index {|p| fscore[p[1]][p[0]] <= fscore[pos[1]][pos[0]] }
        if idx then
          oset.insert(idx,pos)
        else
          oset << pos
        end
      end
    end
  end
  return false
end

#cost_position(port, pos) ⇒ Object

Compute the cost of a position +pos+ relatively to +port+.



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# File 'lib/HDLRuby/hruby_viz.rb', line 1574

def cost_position(port,pos)
  elem = @route_matrix[pos[1]][pos[0]]
  return (elem == nil or elem == port) ? 0 : 1
end

#distance(ic0, ic1) ⇒ Object

Compute the distance between to IC.



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# File 'lib/HDLRuby/hruby_viz.rb', line 155

def distance(ic0,ic1)
  res = Math.sqrt((ic0.xpos-ic1.xpos)**2+(ic0.ypos-ic1.ypos)**2)
  # res = (ic0.xpos-ic1.xpos).abs+(ic0.ypos-ic1.ypos).abs
  return res
end

#down_port_svg(name, type, xpos, ypos, width, height) ⇒ Object

Generate a down port description SVG text.



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# File 'lib/HDLRuby/hruby_viz.rb', line 2567

def down_port_svg(name,type,xpos,ypos,width,height)
  case type
  when :posedge
    res = "<rect fill=\"#88f\" stroke=\"#000\" " 
  when :negedge
    res = "<rect fill=\"#f88\" stroke=\"#000\" " 
  else
    res = "<rect fill=\"#ff0\" stroke=\"#000\" " 
  end
  res += "x=\"#{xpos}\" y=\"#{ypos}\" " + 
    "stroke-width=\"#{@scale/16.0}\" " +
    "width=\"#{width}\" height=\"#{height}\"/>\n"
  res += "<polygon fill=\"#000\" stroke=\"none\" " +
    "points=\"#{xpos+width/2.0},#{ypos} #{xpos},#{ypos+height} " +
    "#{xpos+width},#{ypos+height}\"/>\n"
  return res
end

#forceX(ic, t = 0.0) ⇒ Object

Compute the X force applied on a (assumed) child +ic+.



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# File 'lib/HDLRuby/hruby_viz.rb', line 179

def forceX(ic, t=0.0)
  k = Math.sqrt(1.0/@children.size)
  # Repulive force.
  repulsive = @children.reduce(0.0) do |sum,child|
    # Skip ic as repulsive contribution.
    next sum if child == ic
    d = distance(ic,child)
    # Ensure d is not 0 to avoid infinity.
    d = EPSILON if d < EPSILON
    sum + ((k**2) / d) * xrate(ic,child)
  end
  # Limit repulsive to avoid explosion.
  puts "repulsive X=#{repulsive}"
  # Attractive force.
  attractive = (ic.adjacents).reduce(0.0) do |sum,adj|
    # Skip world as adjacent.
    next sum if adj == self
    # puts "ic=#{ic.name} adj=#{adj.name}"
    # Compute the attractive contribution of adj.
    d = distance(ic,adj)
    force = -(xrate(ic,adj)*d**2)/k
    sum + force
  end
  puts "attractive X=#{attractive}"
  # Returns the resulting force.
  return (repulsive + attractive)*Math.exp(-t)
end

#forceY(ic, t = 0.0) ⇒ Object

Compute the Y force applied on a (assumed) child +ic+.



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# File 'lib/HDLRuby/hruby_viz.rb', line 208

def forceY(ic, t=0.0)
  k = Math.sqrt(1.0/@children.size)
  # Repulive force.
  repulsive = @children.reduce(0.0) do |sum,child|
    # Skip ic as repulsive contribution
    next sum if child == ic
    d = distance(ic,child)
    # Ensure d is not 0 to avoid infinity.
    d = EPSILON if d < EPSILON
    sum + ((k**2) / d) * yrate(ic,child)
  end
  puts "repulsive Y=#{repulsive}"
  # Attractive force.
  attractive = (ic.adjacents).reduce(0.0) do |sum,adj|
    # Skip world as adjacent.
    next sum if adj == self
    # Compute the attractive contribution of adj.
    d = distance(ic,adj)
    force = -(yrate(ic,adj)*d**2)/k
    sum + force
  end
  puts "attractive Y=#{attractive}"
  # Returns the resulting force.
  # return (repulsive + attractive).round(@children.size)
  # return repulsive + attractive
  return (repulsive + attractive)*Math.exp(-t)
end

#free_neighbors(port0, port1, cpos) ⇒ Object

Get the neighbor free positions for port. def free_neighbors(port,cpos)



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# File 'lib/HDLRuby/hruby_viz.rb', line 1535

def free_neighbors(port0,port1,cpos)
  res = []
  # Left neighbor.
  lpos = [cpos[0]-1,cpos[1]]
  if lpos[0] >= 0 then
    elem = @route_matrix[lpos[1]][lpos[0]]
    # res << lpos if elem.free_from_right?(port)
    res << lpos if elem.free_from_right?(port0,port1) and
      !ic_port_conflict(port0,port1,[lpos[0]-1,lpos[1]],RIGHT)
  end
  # Up neighbor.
  upos = [cpos[0],cpos[1]+1]
  if upos[1] < @route_height then
    elem = @route_matrix[upos[1]][upos[0]]
    # res << upos if elem.free_from_down?(port)
    res << upos if elem.free_from_down?(port0,port1) and
      !ic_port_conflict(port0,port1,[upos[0],upos[1]+1],DOWN)
  end
  # Right neighbor.
  rpos = [cpos[0]+1,cpos[1]]
  if rpos[0] < @route_width then
    elem = @route_matrix[rpos[1]][rpos[0]]
    # res << rpos if elem.free_from_left?(port)
    res << rpos if elem.free_from_left?(port0,port1) and
      !ic_port_conflict(port0,port1,[rpos[0]+1,rpos[1]],LEFT)
  end
  # Down neighbor.
  dpos = [cpos[0],cpos[1]-1]
  if dpos[1] >= 0 then
    elem = @route_matrix[dpos[1]][dpos[0]]
    # res << dpos if elem.free_from_up?(port)
    res << dpos if elem.free_from_up?(port0,port1) and
      !ic_port_conflict(port0,port1,[dpos[0],dpos[1]-1],UP)
  end
  # Return the free neigbor positions.
  return res
end

#height_children ⇒ Object

Compute the global height of the current placement.



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# File 'lib/HDLRuby/hruby_viz.rb', line 510

def height_children
  y0 = 1/0.0
  y1 = -1/0.0
  @children.each do |child|
    y0 = child.ypos if child.ypos < y0
    y1 = child.ypos if child.ypos > y1
  end
  return y1-y0
end

#ic_port_conflict(port0, port1, pos, side) ⇒ Object

Check if there is a port at location +pos+ in +side+ that conflict with both +port0+ and +port1+.



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# File 'lib/HDLRuby/hruby_viz.rb', line 1509

def ic_port_conflict(port0,port1,pos,side)
  return false unless @route_matrix[pos[1]]
  return false unless @route_matrix[pos[1]][pos[0]]
  ic = @route_matrix[pos[1]][pos[0]].ic
  return false unless ic # No IC here, so not possible port to conflict
  # There is an IC get the port at pos from side if any.
  p = nil
  case side
  when LEFT
    port = ic.lports.find {|p| p.xpos==pos[0] && p.ypos==pos[1] }
  when UP
    port = ic.uports.find {|p| p.xpos==pos[0] && p.ypos==pos[1] }
  when RIGHT
    port = ic.rports.find {|p| p.xpos==pos[0] && p.ypos==pos[1] }
  when DOWN
    port = ic.dports.find {|p| p.xpos==pos[0] && p.ypos==pos[1] }
  end
  if port and port != port0 and port != port1 then
    return true
  else
    return false
  end
end

#init_route ⇒ Object

Create the global routing matrix.



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# File 'lib/HDLRuby/hruby_viz.rb', line 1477

def init_route
  # Build the matrix.
  @route_height = @rheights.reduce(:+)
  @route_width  = @cwidths.reduce(:+)
  @route_matrix = []
  @route_height.times do
    row = []
    @route_matrix << row
    @route_width.times { row << Tile.new }
  end
  # Fill it with the ic.
  puts "@route_width=#{@route_width} @route_height=#{@route_height}"
  @children.each do |child|
    x0 = child.xpos
    y0 = child.ypos
    # puts "child=#{child.name} x0=#{x0} y0=#{y0} child.height=#{child.height} child.width=#{child.width}"
    child.height.times do |y|
      child.width.times do |x|
        @route_matrix[y0+y][x0+x].ic = child
      end
    end
  end
end

#instance_svg(ic) ⇒ Object

Generate an instance description SVG text for +ic+



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# File 'lib/HDLRuby/hruby_viz.rb', line 2215

def instance_svg(ic)
  id = Viz.to_svg_id(ic.name)
  # The rectangle representing the instance.
  res = "<rect id=\"#{id}\" fill=\"#eee\" stroke=\"#000\" " +
    "stroke-width=\"#{@scale/12.0}\" " +
    "x=\"#{ic.xpos*@scale}\" y=\"#{ic.ypos*@scale}\" " +
    "width=\"#{ic.width*@scale}\" "+
    "height=\"#{ic.height*@scale}\"/>\n"
  # Its name.
  sy = (ic.lports.size.even? and ic.rports.size.even? ) ? 0 : -0.5 # Shift to avoid ports
  res += "<text id=\"text#{id}\" " +
    "style=\"text-anchor: middle; dominant-baseline: middle;\" " +
    "font-family=\"monospace\" font-size=\"1px\" " +
    "x=\"#{(ic.xpos + ic.width/2.0)*@scale}\" "+
    "y=\"#{(ic.ypos + ic.height/2.0 + sy)*@scale}\">" +
    ic.name + "</text>\n"
  # Its text resizing.
  res += Viz.svg_text_fit("text#{id}",(ic.width-0.6)*@scale,
                           0.6*@scale)
  return res
end

#left_port_svg(name, type, xpos, ypos, width, height) ⇒ Object

Generate a left port description SVG text.



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# File 'lib/HDLRuby/hruby_viz.rb', line 2493

def left_port_svg(name,type,xpos,ypos,width,height)
  uX = width/16.0
  uY = height/16.0
  case type
  when :posedge
    res = "<rect fill=\"#88f\" stroke=\"#000\" " 
  when :negedge
    res = "<rect fill=\"#f88\" stroke=\"#000\" " 
  else
    res = "<rect fill=\"#ff0\" stroke=\"#000\" " 
  end
  res += "x=\"#{xpos}\" y=\"#{ypos}\" " + 
    "stroke-width=\"#{@scale/16.0}\" " +
    "width=\"#{width}\" height=\"#{height}\"/>\n"
  res += "<polygon fill=\"#000\" stroke=\"none\" " +
    "points=\"#{xpos},#{ypos+height/2.0} #{xpos+width},#{ypos} " +
    "#{xpos+width},#{ypos+height}\"/>\n"
  return res
end

#left_right_port_svg(name, type, xpos, ypos, width, height) ⇒ Object

Generate a left-right port description SVG text.



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# File 'lib/HDLRuby/hruby_viz.rb', line 2533

def left_right_port_svg(name,type,xpos,ypos,width,height)
  res = "<rect fill=\"#FF0\" stroke=\"#000\" " +
    "x=\"#{xpos}\" y=\"#{ypos}\" " + 
    "stroke-width=\"#{@scale/16.0}\" " +
    "width=\"#{width}\" height=\"#{height}\"/>\n"
  res += "<polygon fill=\"#000\" stroke=\"none\" " +
    "points=\"#{xpos},#{ypos+height/2} #{xpos+width},#{ypos} " +
    "#{xpos+width},#{ypos+height}\"/>\n"
  res += "<polygon fill=\"#000\" stroke=\"none\" " +
    "points=\"#{xpos},#{ypos} #{xpos+width},#{ypos+height/2.0} " +
    "#{xpos},#{ypos+height}\"/>\n"
  return res
end

#matrix_children ⇒ Object

Compute the matrix that isolate each children in current placement.



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# File 'lib/HDLRuby/hruby_viz.rb', line 552

def matrix_children
  if @children.size == 1 then
    # Only one child.
    @matrix = [ [@children[0]] ]
    return @matrix
  end
  x0,y0,x1,y1 = @box
  # puts "box=#{@box}"
  width = x1-x0
  height = y1-y0
  nrows = 1
  ncols = 1
  @matrix = nil
  dir = :x
  separate = false
  while !separate do
    @matrix = []
    nrows.times { @matrix << [] }
    xstep = width / nrows
    ystep = height / ncols
    # puts "ncols=#{ncols} nrows=#{nrows} xstep=#{xstep} ystep=#{ystep}"
    separate = true
    @children.each do |child|
      col = ((child.xpos - x0) / xstep).floor
      col = ncols-1 if col >= ncols
      row = ((child.ypos - y0) / ystep).floor
      row = nrows-1 if row >= nrows
      # puts "xpos=#{child.xpos} ypos=#{child.ypos} col=#{col} row=#{row}"
      if matrix[row][col] then
        separate = false
        break
      else
        matrix[row][col] = child
      end
    end
    if dir == :x then
      ncols += 1
      dir = :y
    else
      nrows += 1
      dir = :x
    end
  end
  # Ensures the matrix rows are of identical size.
  ncols = @matrix.map {|row| row.size}.max
  @matrix.each {|row| row[ncols-1] = nil unless row[ncols-1] }

  # Compress the matrix by mergin colums and rows when possible
  # (i.e. not more than one children per cell.
  # For the rows.
  compressed= []
  nrows = @matrix.size
  ncols = @matrix[0].size
  puts "Before compression: nrows=#{nrows} ncols=#{ncols}"
  cidx = 0
  while(cidx < nrows) do
    # Add a new compressed row.
    compressed << @matrix[cidx].clone
    # Try to merge following rows to it.
    nidx = cidx + 1
    while (nidx < nrows) do
      if ncols.times.any? {|i| compressed[-1][i] and @matrix[nidx][i] } then
        # Cannot merge, stop compression of current row here.
        # (subtract 1 since cidx is increased after loop).
        cidx = nidx-1
        break
      else
        # Can merge, compress, and try to merge again.
        @matrix[nidx].each.with_index do |child,i|
          compressed[-1][i] = child if child
        end
        nidx += 1
        cidx += 1
      end
    end
    cidx += 1
  end
  # Update the matrix with the compression result.
  @matrix = compressed
  # Now compress for the columns.
  nrows = @matrix.size
  compressed= []
  nrows.times { compressed << [] }
  cidx = 0
  while(cidx < ncols) do
    # Add a new compressed column.
    @matrix.each_with_index {|row,i| compressed[i] << row[cidx] }
    # Try to merge following columns to it.
    nidx = cidx + 1
    while (nidx < ncols) do
      if nrows.times.any? {|i| compressed[i][-1] and @matrix[i][nidx] } then
        # Cannot merge, stop compression of current column here.
        # (subtract 1 since cidx is increased after loop).
        cidx = nidx-1
        break
      else
        # Can merge, compress, and try to merge again.
        @matrix.each.with_index do |row,i|
          child = row[nidx]
          compressed[i][-1] = child if child
        end
        nidx += 1
        cidx += 1
      end
    end
    cidx += 1
  end
  # Update the matrix with the compression result.
  @matrix = compressed

  puts "After compression: nrows=#{nrows} ncols=#{ncols}"

  # Returns the resulting matrix.
  return @matrix
end

#memory_svg(ic) ⇒ Object

Generate a memory description SVG text for +ic+



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# File 'lib/HDLRuby/hruby_viz.rb', line 2336

def memory_svg(ic)
  id = Viz.to_svg_id(ic.name)
  res = "<rect id=\"#{id}\" fill=\"#fff\" stroke=\"#000\" " +
    "stroke-width=\"#{@scale/16.0}\" " +
    "x=\"#{ic.xpos*@scale}\" y=\"#{ic.ypos*@scale}\" " +
    "rx=\"#{@scale/4}\" " +
    "width=\"#{ic.width*@scale}\" "+
    "height=\"#{ic.height*@scale}\"/>\n"
  res += "<rect fill=\"#fff\" stroke=\"#333\" " +
    "stroke-width=\"#{@scale/16.0}\" " +
    "x=\"#{(ic.xpos+1/4.0)*@scale}\" "+
    "y=\"#{(ic.ypos+1/4.0)*@scale}\" " +
    "width=\"#{(ic.width-1/2.0)*@scale}\" "+
    "height=\"#{(ic.height-1/2.0)*@scale}\"/>\n"
  res += "<line stroke=\"#333\" " +
    "stroke-width=\"#{@scale/16.0}\" " +
    "x1=\"#{(ic.xpos+1/4.0+1/8.0)*@scale}\" "+
    "y1=\"#{(ic.ypos+1/4.0)*@scale}\" " +
    "x2=\"#{(ic.xpos+1/4.0+1/8.0)*@scale}\" "+
    "y2=\"#{(ic.ypos+ic.height-1/4.0)*@scale}\"/>\n"
  res += "<line stroke=\"#333\" " +
    "stroke-width=\"#{@scale/16.0}\" " +
    "x1=\"#{(ic.xpos+1/4.0)*@scale}\" "+
    "y1=\"#{(ic.ypos+1/4.0+1/8.0)*@scale}\" " +
    "x2=\"#{(ic.xpos+ic.width-1/4.0)*@scale}\" "+
    "y2=\"#{(ic.ypos+1/4.0+1/8.0)*@scale}\"/>\n"
  # Its name.
  res += "<text id=\"text#{id}\" " +
    "style=\"text-anchor: middle; dominant-baseline: middle;\" " +
    "font-family=\"monospace\" font-size=\"1px\" " +
    "x=\"#{(ic.xpos + ic.width/2.0 + 1/10.0)*@scale}\" "+
    "y=\"#{(ic.ypos + ic.height/2.0)*@scale}\">" +
    ic.name + "</text>\n"
  # Its text resizing.
  res += Viz.svg_text_fit("text#{id}",(ic.width-1.0)*@scale,
                           0.6*@scale)
  return res
end

#minimize_height_children ⇒ Object

Rotate the current placement to minimize its global height.



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# File 'lib/HDLRuby/hruby_viz.rb', line 533

def minimize_height_children
  dt = 0.01
  t = dt
  minh = 1/0.0
  mint = t
  while t < 2*Math::PI do
    h = self.height_children
    if minh > h then
      mint = t
      minh = h
    end
    rotate_children(dt)
    t += dt
  end
  rotate_children(mint+dt)
end

#normalize_size_children ⇒ Object

Normalize the size of the children so than children with same number of statements have the same area, if they are of the same kind, they have the same shape, if the areas of the children are in the same order as their number of statements. However, registers and memory are not processed here (yet?).



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# File 'lib/HDLRuby/hruby_viz.rb', line 743

def normalize_size_children
  # Group the non-register and non-memory children by number of 
  # statements.
  by_stmnts = Hash.new {|h,k| h[k] = [] }
  @children.each do |child|
    if child.type != :register and child.type != :memory then
      by_stmnts[child.number_statements] << child
    end
  end
  area = 1     # Current area
  iW, iH = 1,1 # Current width and height of instance.
  pW, pH = 1,1 # Current width and height of process.
  # Ensure that these children of a group have the same area greater
  # than min_area, and the same shape if they are of the same kind.
  by_stmnts.each_key.sort.each do |num|
    ics = by_stmnts[num]
    puts "With number of statements: #{num} are base area=#{area}"
    # First compute the target area, and width and height of each type.
    ics.each do |ic|
      # Update the target area.
      n_area = ic.width * ic.height
      area = n_area if n_area > area
      # Depending on the type, update the target width and height.
      if ic.type == :instance then
        iW = ic.width if ic.width > iW
        iH = ic.height if ic.height > iH
        # Ensure the target area is reached.
        while iW*iH < area do
          # For instances, increase squarely.
          if iW <= iH then
            iW += 1
          else
            iH += 1
          end
        end
        # Reupdate the area.
        area = iW*iH
      else
        pW = ic.width if ic.width > pW
        pH = ic.height if ic.height > pH
        # Ensure the target area is reached.
        if ic.branches[0].type == :par then
          # For par processes, increase squarely.
          if pW <= pH then
            pW += 1
          else
            pH += 1
          end
        else
          # For non par processes, increase vertically.
          while pW*pH < area do
            pH += 1
          end
        end

        # Reupdate the area.
        area = pW*pH
      end
    end
    # Update the size of the ics.
    ics.each do |ic|
      if ic.type == :instance then
        ic.width = iW
        ic.height = iH
      else
        puts "For process #{ic.name} setting size from #{ic.width},#{ic.height} to #{pW},#{pH}"
        ic.width = pW
        ic.height = pH
      end
    end
    # Ensure the area increase when the number of statements is larger.
    area += 1
    puts "Now area=#{area}"
  end
end

#number_statements ⇒ Object

Give the size of the IC in number of statements.



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# File 'lib/HDLRuby/hruby_viz.rb', line 112

def number_statements
  # Get the number from the branches.
  snum = @branches.reduce(0) do |sum,branch|
    sum + branch.number_statements
  end
  # Recurse on the child IC.
  snum += @children.reduce(0) do |sum,child|
    sum + child.number_statements
  end
end

#place_and_route ⇒ Object

Do the full place and route.



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# File 'lib/HDLRuby/hruby_viz.rb', line 2031

def place_and_route
  # Nothing to do if no children.
  if self.children.empty? then
    @route_matrix = []
    return
  end
  # Do the pre-placement.
  self.preplace_children

  puts "Pre-placement result: "
  # Display the result.
  self.children.each_with_index do |child|
    puts "#{child.name}: x=#{child.xpos} y=#{child.ypos}"
  end

  # Do the placement.
  self.place_children

  puts "Placement result: "
  # Display the result.
  self.children.each_with_index do |child|
    puts "#{child.name}: x=#{child.xpos} y=#{child.ypos}"
  end

  # Centers the result.
  self.bounding_children
  self.center_children

  # Minimize the height.
  self.bounding_children
  self.minimize_height_children

  # Centers the result.
  self.bounding_children
  self.center_children

  puts "Orientation result: "
  # Display the result.
  self.children.each do |child|
    puts "#{child.name}: x=#{child.xpos} y=#{child.ypos}"
  end

  # Compute the placement matrix.
  self.bounding_children
  matrix = self.matrix_children
  puts "matrix:"
  matrix.each { |row| puts "#{row.map{|ic| ic ? ic.name : "   " }}" }

  # Compute the side of the ports.
  self.bounding_children

  # For self.
  self.side_ports

  puts "Self ports side results:"
  self.ports.each_with_index do |port,j|
    if port.targets[0] then
      puts "#{self.name} port #{port.name} (to #{port.targets[0].ic.name}): #{port.side}"
    else
      puts "#{self.name} port #{port.name} (dangling): #{port.side}"
    end
  end

  # For the children.
  self.side_children

  puts "Children ports side results: "
  self.children.each_with_index do |child|
    child.ports.each_with_index do |port,j|
      if port.targets[0] then
        puts "#{child.name} port #{port.name} (to #{port.targets[0].ic.name}): #{port.side}"
      else
        puts "#{child.name} port #{port.name} (dangling): #{port.side}"
      end
    end
  end

  # Compute the size of the ICs.
  self.size_children
  self.normalize_size_children

  puts "Size results: "
  self.children.each do |child|
    puts "#{child.name}: width=#{child.width} height=#{child.height}"
  end

  routed = false
  @retries.times do |ret|
    puts "Route matrix sizing and route: try #{ret} (border=#{@border}, cell border=#{@cell_border})..."
    # Compute the size of the matrix cells.
    self.size_matrix
    puts "Self size: width=#{self.width} height=#{self.height}"

    puts "Cells sizes: "
    puts "  Columns' widths: #{self.cwidths}"
    puts "  Rows' heights:   #{self.rheights}"


    # Recompute the precise place of the ICs using the size of the matrix cells.
    self.place_children_matrix
    puts "Matrix-based placement result: "
    # Display the result.
    self.children.each do |child|
      puts "#{child.name}: x=#{child.xpos} y=#{child.ypos}"
    end

    # Place the ports using the matrix cells.
    self.place_ports_matrix
    puts "Matrix-base port placement result: "
    # Display the result.
    self.children.each do |child|
      puts "For #{child.name}([#{child.xpos},#{child.ypos}]):" +
        child.ports.map {|p| "#{p.name}: [#{p.side} #{p.xpos},#{p.ypos}]" }.join(", ")
    end
    puts "For self:" +
      self.ports.map {|p| "#{p.name}: [#{p.side} #{p.xpos},#{p.ypos}]" }.join(", ")

    # Fine-tune the placement.
    self.place_children_port_matrix
    puts "Matrix-base ic-port placement fine tuning result: "
    # Display the result.
    self.children.each do |child|
      puts "For #{child.name}:" +
        child.ports.map {|p| "#{p.name}: [#{p.side} #{p.xpos},#{p.ypos}]" }.join(", ")
    end
    puts "For self:" +
      self.ports.map {|p| "#{p.name}: [#{p.side} #{p.xpos},#{p.ypos}]" }.join(", ")

    # Route the ports' connections.
    routed = self.route_children
    break if routed # Success

    # @border *= 2
    # @cell_border *= 2
    # @port_width += 1
    @border *= 4
    @cell_border *= 4
    @port_width += 2
  end
  raise "Route failure." unless routed

  puts "Routes:"
  # Display the result.
  self.routes.each do |route|
    puts "#{route.ports.map {|p| p.name}.join(" to ")}:  #{route.path}"
  end

  # Generate the wiring and connection content of the tiles.
  self.wire_route_tiles

  # Compress the route matrix and update the position of the objects
  # accordignly.
  self.compress_route_tiles
end

#place_and_route_deep ⇒ Object

Deeply place and route.



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# File 'lib/HDLRuby/hruby_viz.rb', line 2188

def place_and_route_deep
  # Place and route current IC.
  self.place_and_route
  # Recurse the place and route for the instance children.
  @children.each do |child|
    if child.type == :instance then
      # Case on instance: place and route its system.
      child.system.place_and_route_deep 
    else
      puts "Place and route node for ic=#{child.name}"
      # Otherwise recurse on the branches.
      child.branches.each { |branch| branch.place_and_route_deep }
    end
  end
end

#place_children ⇒ Object

Place the children.



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# File 'lib/HDLRuby/hruby_viz.rb', line 237

def place_children
  # epoch = @children.size*100
  epoch = 100
  delta = 1.0/@children.size
  epoch.times do |i|
    puts "epoch=#{i}"
    # Move the children according to the forces, 
    # # but make the first one to be on fixed position to avoid drift.
    # children[1..-1].each do |child|
    children.each do |child|
      puts "for child=#{child.name}"
      dx = delta * forceX(child,i.to_f)
      dy = delta * forceY(child,i.to_f)
      dx = 1.0 if dx > 1.0
      dx = -1.0 if dx < -1.0
      dy = 1.0 if dy > 1.0
      dy = -1.0 if dy < -1.0
      child.xpos += dx
      child.ypos += dy
      puts "Now child.xpos=#{child.xpos}"
      puts "Now child.ypos=#{child.ypos}"
    end
  end
end

#place_children_matrix ⇒ Object

Tune the placing of the children according to their size and the matrix.



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# File 'lib/HDLRuby/hruby_viz.rb', line 852

def place_children_matrix
  # Auth: place the children in the center of their respective
  # cells.
  ypos = 0
  @matrix.each_with_index do |row,i|
    xpos = 0
    row.each_with_index do |child,j|
      if child then
        child.xpos = xpos + (@cwidths[j]-child.width) / 2
        child.ypos = ypos + (@rheights[i]-child.height) / 2
      end
      xpos += @cwidths[j]
    end
    ypos += @rheights[i]
  end
end

#place_children_port_matrix ⇒ Object

Fine-tune the placement of the ICs to increase alignment of connected ports. Also fine-place the ports of the current IC to also increase the aligment of connected ports.



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# File 'lib/HDLRuby/hruby_viz.rb', line 1023

def place_children_port_matrix
  # xpos, ypos = 0, 0
  # @matrix.each_with_index do |row,i|
  #   xpos = 0
  #   mypos = ypos + @rheights[i]
  #   row.each_with_index do |child,j|
  #     mxpos = xpos + @cwidths[j]
  #     if child then
  #       # Tune x position.
  #       # Find the best delta.
  #       bdx = 0       # Best y delta
  #       bcost = 1/0.0 # Best score
  #       xpos_in_cell = child.xpos - xpos  # Initial position in cell
  #       xpos_in_cell -= @border if j == 0 # Do not go inside the border
  #       (@cwidths[j]-child.width).times do |dx|
  #         dx = dx - xpos_in_cell # Adjust delta x to the initial position
  #         cost = child.ports.reduce(0) do |sum,port|
  #           pxpos = port.xpos + dx
  #           sum + port.targets.reduce(0) do |subsum,tport|
  #             # There is cost when the port is not align with the target.
  #             if (port.side == LEFT and tport.side == RIGHT) or
  #                 (port.side == UP and tport.side == UP) then
  #               # For left to right or up yo up connections, 
  #               # the first side should be 2 tiles on the left for
  #               # straight wire or avoiding routing conjestion.
  #               subsum + (pxpos-tport.xpos-2) != 0 ? 1 : 0
  #             elsif (port.side == RIGHT and tport.side == LEFT) or
  #                 (port.side == DOWN and tport.side == DOWN) then
  #               # For right to left or down to down connections,
  #               # the first side should be 2 tiles on the right for
  #               # straight wire or avoiding routing conjestion.
  #               subsum + (pxpos-tport.xpos+2) != 0 ? 1 : 0
  #             else
  #               # Otherwise, perfect aligment is the best.
  #               subsum + (pxpos-tport.xpos) != 0 ? 1 : 0
  #             end
  #           end
  #         end
  #         if cost < bcost then
  #           bcost = cost
  #           bdx = dx
  #         end
  #       end
  #       # Ensure the child does not goes out of its cell.
  #       if child.xpos + bdx < xpos then
  #         bdx = xpos - child.xpos
  #       elsif child.xpos + child.width + bdx >= mxpos then
  #         bdx = mxpos - child.xpos - child.width - 1
  #       end
  #       # Apply the best delta.
  #       child.xpos += bdx
  #       # Update the ports position.
  #       child.ports.each {|port| port.xpos += bdx }

  #       # Tune y position.
  #       puts "for child=#{child.name}"
  #       # Find the best delta.
  #       bdy = 0       # Best x delta
  #       bcost = 1/0.0 # Best score
  #       ypos_in_cell = child.ypos - ypos  # Initial position in cell
  #       ypos_in_cell -= @border if i == 0 # Do not go to the outer border
  #       (@rheights[i]-child.height).times do |dy|
  #         dy = dy - ypos_in_cell # Adjust dela y with initial position
  #         cost = child.ports.reduce(0) do |sum,port|
  #           pypos = port.ypos + dy
  #           sum + port.targets.reduce(0) do |subsum,tport|
  #             # There is cost when the port is not align with the target.
  #             if (port.side == UP and tport.side == DOWN) or
  #                 (port.side == RIGHT and tport.side == RIGHT) then
  #               # For up to down or right to right connections,
  #               # the first side should be 2 tiles on the right for
  #               # straight wire or avoiding routing conjestion.
  #               subsum + (pypos-tport.ypos+2) != 0 ? 1 : 0
  #             elsif (port.side == DOWN and tport.side == UP) or
  #                 (port.side == LEFT and tport.side == LEFT) then
  #               # For down to up or left to left connections,
  #               # the forst side should be 2 tiles on the down for
  #               # straight wire or avoiding routing conjestion.
  #               subsum + (pypos-tport.ypos-2) != 0 ? 1 : 0
  #             else
  #               subsum + (pypos-tport.ypos) != 0 ? 1 : 0 
  #             end
  #           end
  #         end
  #         if cost < bcost then
  #           bcost = cost
  #           bdy = dy
  #         end
  #       end
  #       # puts "mypos=#{mypos} child.ypos=#{child.ypos} bdy=#{bdy}"
  #       # Ensure the child does not goes out of its cell.
  #       if child.ypos + bdy < ypos then
  #         bdy = ypos - child.ypos 
  #       elsif child.ypos + child.height + bdy >= mypos then
  #         bdy = mypos - child.ypos - child.height - 1
  #       end
  #       # Apply the best delta.
  #       child.ypos += bdy
  #       # Update the ports position.
  #       child.ports.each {|port| port.ypos += bdy }
  #     end
  #     xpos += @cwidths[j]
  #   end
  #   ypos += @rheights[i]
  # end

  # First prepare the algorthims: sort the children for
  # vertical and horizontal processing and locate their
  # respective row and column intervals.
  # Sort the children by decreasing number of left and right ports, 
  # for placing the one with more freedom last.
  vert_sorted = @children.sort do |c0,c1|
    ([c1.lports.size,c1.rports.size]).max <=> 
    ([c0.lports.size,c0.rports.size]).max
  end
  hori_sorted = @children.sort do |c0,c1|
    ([c1.uports.size,c1.dports.size]).max <=> 
    ([c0.uports.size,c0.dports.size]).max
  end
  # Get the matrix row and column intervals for each children in order.
  rRange = []
  cRange = []
  xpos, ypos = 0, 0
  @matrix.each_with_index do |row,i|
    xpos = 0
    mypos = ypos + @rheights[i]
    row.each_with_index do |child,j|
      mxpos = xpos + @cwidths[j]
      if child then
        iV = vert_sorted.index(child)
        iH = hori_sorted.index(child)
        fxpos = xpos == 0 ? xpos + @border/2 : xpos + @cell_border/2
        fypos = ypos == 0 ? ypos + @border/2 : ypos + @cell_border/2
        lxpos = mxpos - @cell_border/2
        lypos = mypos - @cell_border/2
        rRange[iV] = fypos..lypos
        cRange[iH] = fxpos..lxpos
        # puts "For child=#{child.name} iV=#{iV} iH=#{iH} rRange=#{rRange[iV]} cRange=#{cRange[iH]}"
      end
      xpos += @cwidths[j]
    end
    ypos += @rheights[i]
  end

  # Tune the vertical placement of each child.
  vert_sorted.each_with_index do |child,i|
    # Tune y position.
    # puts "for child=#{child.name} child.ypos=#{child.ypos} vertical idx=#{i} rRange[i]=#{rRange[i]}"
    # Find the best delta.
    bdy = 0       # Best y delta
    bcost = 1/0.0 # Best score
    mypos = rRange[i].last
    ypos = rRange[i].first
    ypos_in_cell = child.ypos - ypos  # Initial position in cell
    # ypos_in_cell -= @border if i == 0 # Do not go to the outer border
    # (@rheights[i]-child.height).times do |dy|
    (rRange[i].size-child.height).times do |dy|
      # puts "dy=#{dy}"
      dy = dy - ypos_in_cell # Adjust detla y with initial position
      cost = child.ports.reduce(0) do |sum,port|
        pypos = port.ypos + dy
        sum + port.targets.reduce(0) do |subsum,tport|
          # There is cost when the port is not align with the target.
          if (port.side == UP and tport.side == DOWN) or
              (port.side == RIGHT and tport.side == RIGHT) then
            # For up to down or right to right connections,
            # the first side should be 2 tiles on the right for
            # straight wire or avoiding routing conjestion.
            subsum + (pypos-tport.ypos+2) != 0 ? 1 : 0
          elsif (port.side == DOWN and tport.side == UP) or
            (port.side == LEFT and tport.side == LEFT) then
            # For down to up or left to left connections,
            # the forst side should be 2 tiles on the down for
            # straight wire or avoiding routing conjestion.
            subsum + (pypos-tport.ypos-2) != 0 ? 1 : 0
          else
            subsum + (pypos-tport.ypos) != 0 ? 1 : 0 
          end
        end
      end
      if cost < bcost then
        bcost = cost
        bdy = dy
      end
    end
    # puts "mypos=#{mypos} child.ypos=#{child.ypos} bdy=#{bdy}"
    # Ensure the child does not goes out of its cell.
    if child.ypos + bdy < ypos then
      bdy = ypos - child.ypos 
    elsif child.ypos + child.height + bdy >= mypos then
      bdy = mypos - child.ypos - child.height - 1
    end
    # Apply the best delta.
    child.ypos += bdy
    # puts "child new ypos=#{child.ypos} (bdy=#{bdy})"
    # Update the ports position.
    child.ports.each {|port| port.ypos += bdy }
  end
  
  # Tune the horizontal placement of each child.
  hori_sorted.each_with_index do |child,i|
    # puts "for child=#{child.name} child.xpos=#{child.ypos} horizontal idx=#{i} cRange[i]=#{cRange[i]}"
    # Tune x position.
    # puts "for child=#{child.name}"
    # Find the best delta.
    bdx = 0       # Best x delta
    bcost = 1/0.0 # Best score
    xpos = cRange[i].first
    mxpos = cRange[i].last
    xpos_in_cell = child.xpos - xpos  # Initial position in cell
    xpos_in_cell -= @border if i == 0 # Do not go to the outer border
    # (@cwidths[i]-child.width).times do |dx|
    (cRange[i].size-child.width).times do |dx|
      dx = dx - xpos_in_cell # Adjust dela x with initial position
      cost = child.ports.reduce(0) do |sum,port|
        pxpos = port.xpos + dx
        sum + port.targets.reduce(0) do |subsum,tport|
          # There is cost when the port is not align with the target.
          if (port.side == LEFT and tport.side == RIGHT) or
              (port.side == UP and tport.side == UP) then
            # For left to right or up yo up connections, 
            # the first side should be 2 tiles on the left for
            # straight wire or avoiding routing conjestion.
            subsum + (pxpos-tport.xpos-2) != 0 ? 1 : 0
          elsif (port.side == RIGHT and tport.side == LEFT) or
            (port.side == DOWN and tport.side == DOWN) then
            # For right to left or down to down connections,
            # the first side should be 2 tiles on the right for
            # straight wire or avoiding routing conjestion.
            subsum + (pxpos-tport.xpos+2) != 0 ? 1 : 0
          else
            # Otherwise, perfect aligment is the best.
            subsum + (pxpos-tport.xpos) != 0 ? 1 : 0
          end
        end
      end
      if cost < bcost then
        bcost = cost
        bdx = dx
      end
    end
    # puts "mxpos=#{mxpos} child.xpos=#{child.ypos} bdx=#{bdx}"
    # Ensure the child does not goes out of its cell.
    if child.xpos + bdx < xpos then
      bdx = xpos - child.xpos 
    elsif child.xpos + child.width + bdx >= mxpos then
      bdx = mxpos - child.xpos - child.width - 1
    end
    # Apply the best delta.
    child.xpos += bdx
    # puts "child new xpos=#{child.xpos} (bdx=#{bdx})"
    # Update the ports position.
    child.ports.each {|port| port.xpos += bdx }
  end

  # Also place the ports of the current IC.
  poses = []
  @lports.each do |lport|
    lport.ypos = lport.targets[0].ypos
    lport.ypos += 1 if lport.targets[0].side == UP
    lport.ypos -= 1 if lport.targets[0].side == DOWN
    # Ensure ports do not overlap.
    while poses[lport.ypos] do
      lport.ypos += 1
      lport.ypos = 0 if lport.ypos >= @height
    end
    poses[lport.ypos] = lport
  end
  poses = []
  @uports.each do |uport|
    uport.xpos = uport.targets[0].xpos
    uport.xpos -= 1 if uport.targets[0].side == LEFT
    uport.xpos += 1 if uport.targets[0].side == RIGHT
    puts "Now uport.xpos=#{uport.xpos}"
    # Ensure ports do not overlap.
    while poses[uport.xpos] do
      uport.xpos += 1
      uport.xpos = 0 if uport.xpos >= @width
    end
    poses[uport.xpos] = uport
  end
  poses = []
  @rports.each do |rport|
    rport.ypos = rport.targets[0].ypos
    rport.ypos += 1 if rport.targets[0].side == UP
    rport.ypos -= 1 if rport.targets[0].side == DOWN
    # Ensure ports do not overlap.
    while poses[rport.ypos] do
      rport.ypos += 1
      rport.ypos = 0 if rport.ypos >= @height
    end
    poses[rport.ypos] = rport
  end
  poses = []
  @dports.each do |dport|
    dport.xpos = dport.targets[0].xpos
    dport.xpos -= 1 if dport.targets[0].side == LEFT
    dport.xpos += 1 if dport.targets[0].side == RIGHT
    # Ensure ports do not overlap.
    while poses[dport.xpos] do
      dport.xpos += 1
      dport.xpos = 0 if dport.xpos >= @width
    end
    poses[dport.xpos] = dport
  end
end

#place_ports_matrix ⇒ Object

Compute the position of the ports of each children according to the position matrix, and also the ports of current IC.



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# File 'lib/HDLRuby/hruby_viz.rb', line 872

def place_ports_matrix
  # Preplace the ports, without optimization.
  (@children + [self]).each do |child|
    xpos = child.xpos
    ypos = child.ypos
    width = child.width
    height = child.height
    # The left ports.
    if child.type == :assign and child.lports.size == 1 then
      port = child.lports[0]
      # For assign types, the single ports are placed at the center.
      port.xpos = xpos
      port.ypos = ypos + height/2
    elsif child.lports.any? then
      step = child.height / child.lports.size
      child.lports.each_with_index do |port,i|
        puts "Preplace left port=#{port.name}"
        port.xpos = xpos
        port.ypos = ypos + i*step + step/2
      end
    end
    # The up ports.
    if child.type == :assign and child.uports.size == 1 then
      port = child.uports[0]
      # For assign types, the single ports are placed at the center.
      port.xpos = xpos + width/2
      port.ypos = ypos + height - 1
    elsif child.uports.any? then
      step = child.width / child.uports.size
      child.uports.each_with_index do |port,i|
        puts "Preplace up port=#{port.name}"
        port.xpos = xpos + i*step + step/2
        port.ypos = ypos + height - 1
      end
    end
    # The right ports.
    if child.type == :assign and child.rports.size == 1 then
      port = child.rports[0]
      # For assign types, the single ports are placed at the center.
      port.xpos = xpos + width - 1
      port.ypos = ypos + height/2
    elsif child.rports.any? then
      step = child.height / child.rports.size
      child.rports.each_with_index do |port,i|
        puts "Preplace right port=#{port.name}"
        port.xpos = xpos + width - 1
        port.ypos = ypos + i*step + step/2
      end
    end
    # The down ports.
    if child.type == :assign and child.dports.size == 1 then
      port = child.dports[0]
      # For assign types, the single ports are placed at the center.
      port.xpos = xpos + width/2
      port.ypos = ypos
    elsif child.dports.any? then
      step = child.width / child.dports.size
      child.dports.each_with_index do |port,i|
        puts "Preplace down port=#{port.name}"
        port.xpos = xpos + i*step + step/2
        port.ypos = ypos
      end
    end
  end

  # Optimize the place.
  @children.each do |child|
    xpos = child.xpos
    ypos = child.ypos
    width = child.width
    height = child.height

    # The left ports.
    if child.lports.size > 1 then
      step = child.height / child.lports.size
      lefts = child.lports.clone
      
      # Sort the ports by reverse order y difference with their
      # targets.
      lefts.sort! do |p0,p1| 
        p0.targets.uniq {|t| t.ic }.reduce(0) {|sum,t| sum + t.ypos - p0.ypos } <=>
        p1.targets.uniq {|t| t.ic }.reduce(0) {|sum,t| sum + t.ypos - p1.ypos }
      end
      # Apply the order.
      lefts.each_with_index do |port,i|
        port.xpos = xpos
        port.ypos = ypos + i*step + step/2
      end
    end

    # The up ports.
    if child.uports.size > 1 then
      step = child.width / child.uports.size
      ups = child.uports.clone
      
      # Sort the ports by reverse order x difference with their
      # targets.
      ups.sort! do |p0,p1| 
        p0.targets.uniq {|t| t.ic }.reduce(0) {|sum,t| sum + t.xpos - p0.xpos } <=>
        p1.targets.uniq {|t| t.ic }.reduce(0) {|sum,t| sum + t.xpos - p1.xpos }
      end
      # Apply the order.
      ups.each_with_index do |port,i|
        port.xpos = xpos + i*step + step/2
        port.ypos = ypos + height - 1
      end
    end

    # The right ports.
    if child.rports.size > 1 then
      step = child.height / child.rports.size
      rights = child.rports.clone

      # Sort the ports by reverse order y difference with their
      # targets.
      rights.sort! do |p0,p1| 
        # puts "p0=#{p0.name} p1=#{p1.name}"
        p0.targets.uniq {|t| t.ic }.reduce(0) {|sum,t| sum + t.ypos - p0.ypos } <=>
        p1.targets.uniq {|t| t.ic }.reduce(0) {|sum,t| sum + t.ypos - p1.ypos }
      end
      # Apply the order.
      rights.each_with_index do |port,i|
        port.xpos = xpos + width - 1
        port.ypos = ypos + i*step + step/2
      end
    end

    # The down ports.
    if child.dports.size > 1 then
      step = child.width / child.dports.size
      downs = child.dports.clone

      # Sort the ports by reverse order x difference with their
      # targets.
      downs.sort! do |p0,p1| 
        p0.targets.uniq {|t| t.ic }.reduce(0) {|sum,t| sum + t.xpos - p0.xpos } <=>
        p1.targets.uniq {|t| t.ic }.reduce(0) {|sum,t| sum + t.xpos - p1.xpos }
      end
      # Apply the order.
      downs.each_with_index do |port,i|
        port.xpos = xpos + i*step + step/2
        port.ypos = ypos
      end
    end
  end
end

#port?(name) ⇒ Boolean

Tell if the IC has a port named +name+

Returns:

  • (Boolean) 


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# File 'lib/HDLRuby/hruby_viz.rb', line 93

def port?(name)
  name = name.to_s
  return @ports.any? {|p| p.name == name }
end

#port_str(port) ⇒ Object

Generate the string representing a port for display in the SVG



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# File 'lib/HDLRuby/hruby_viz.rb', line 2606

def port_str(port)
  # Generate the port name (strip everything before the last ".")
  name = port.name.sub(/^.*\./,"")
  # Strip the suffix $I and $O
  name = name.sub(/\$(I|O)$/,"")
  # Add a suffix for edge properties.
  case port.type
  when :posedge
    return name + " \u2197"
  when :negedge
    return name + " \u2198"
  else
    return name
  end
end

#preplace_children ⇒ Object

Quickly pre-place the children in a diagonal with coordinates < 0.5



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# File 'lib/HDLRuby/hruby_viz.rb', line 125

def preplace_children
  # num = @children.size * 2
  # @children.each_with_index do |child,i|
  #   child.xpos = i.to_f / num
  #   child.ypos = i.to_f / num
  # end
  num = 0
  num += 1 while num*num < @children.size
  idx = 0
  num.times do |j|
    num.times do |i|
      child = @children[j*num+i]
      return unless child # The end of the preplacement.
      child.xpos = i.to_f / num
      child.ypos = j.to_f / num
    end
  end
end

#process_svg(ic) ⇒ Object

Generate a process description SVG text for +ic+



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# File 'lib/HDLRuby/hruby_viz.rb', line 2238

def process_svg(ic)
  id = Viz.to_svg_id(ic.name)
  res = "<rect id=\"#{id}\" fill=\"#eee\" stroke=\"#000\" " +
    "stroke-width=\"#{@scale/16.0}\" " +
    "x=\"#{ic.xpos*@scale}\" y=\"#{ic.ypos*@scale}\" " +
    "rx=\"#{@scale}\" " +
    "width=\"#{ic.width*@scale}\" "+
    "height=\"#{ic.height*@scale}\"/>\n"
  # Its name.
  sy = (ic.lports.size.even? and ic.rports.size.even? ) ? 0 : -0.5 # Shift to avoid ports
  res += "<text id=\"text#{id}\" " +
    "style=\"text-anchor: middle; dominant-baseline: middle;\" " +
    "font-family=\"monospace\" font-size=\"1px\" " +
    "x=\"#{(ic.xpos + ic.width/2.0)*@scale}\" "+
    "y=\"#{(ic.ypos + ic.height/2.0 + sy)*@scale}\">" +
    ic.name + "</text>\n"
  # Its text resizing.
  res += Viz.svg_text_fit("text#{id}",(ic.width-0.6)*@scale,
                           0.6*@scale)
  return res
end

#reconstruct_path(port0, port1, from, pos) ⇒ Object

Reconstruct the path and make the connection from +port0+ to +port1+ using the +from+ table for back tracking from position +pos+



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# File 'lib/HDLRuby/hruby_viz.rb', line 1581

def reconstruct_path(port0,port1,from,pos)
  # puts "reconstruct_path for #{port0} and #{port1}"
  # Create the resulting route.
  route = Route.new(port0,port1)
  # Reconstruct the path.
  path = route.path 
  path.unshift(pos)
  apos = pos
  while from.key?(pos) do
    pos = from[pos]
    if (pos == apos) then
      puts "Loop detected for path from #{port0.name} of #{port0.ic.name} to #{port1.name} of #{port1.ic.name}"
      exit
      break
    end
    apos = pos
    path.unshift(pos)
  end
  # Compute previous position: within IC since starting.
  ppos = []
  case port0.side
  when LEFT
    ppos = [pos[0]+1,pos[1]]
  when UP
    ppos = [pos[0],pos[1]-1]
  when RIGHT
    ppos = [pos[0]-1,pos[1]]
  when DOWN
    ppos = [pos[0],pos[1]+1]
  end
  # Write it into the route matrix.
  path.each do |pos|
    # Compute the direction when entering the tile (dir),
    # and the direction when leaving the previous tile (edir).
    if pos[0] > ppos[0] then
      dir = LEFT
      edir = RIGHT
    elsif pos[0] < ppos[0] then
      dir = RIGHT
      edir = LEFT
    elsif pos[1] > ppos[1] then
      dir = UP
      edir = DOWN
    else
      dir = DOWN
      edir = UP
    end
    # Update the route on the tile.
    @route_matrix[pos[1]][pos[0]].routes << [port0,port1,dir]
    # And on the previous tile.
    @route_matrix[ppos[1]][ppos[0]].routes << [port0,port1,edir]
    # Next step.
    ppos = pos
  end
  # Also return the path, it will be used for speeding up rendering.
  return route
end

#register_svg(ic) ⇒ Object

Generate a register description SVG text for +ic+



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# File 'lib/HDLRuby/hruby_viz.rb', line 2313

def register_svg(ic)
  id = Viz.to_svg_id(ic.name)
  res = "<rect id=\"#{id}\" fill=\"#fff\" stroke=\"#000\" " +
    "stroke-width=\"#{@scale/16.0}\" " +
    "x=\"#{ic.xpos*@scale}\" y=\"#{ic.ypos*@scale}\" " +
    "rx=\"#{@scale/4}\" " +
    "width=\"#{ic.width*@scale}\" "+
    "height=\"#{ic.height*@scale}\"/>\n"
  # Its name.
  sy = (ic.lports.size <= 2 or ic.lports.size.even?) ? 0 : -0.5 # Shift to avoid ports (Note: register prots are symetrics, so check left only).
  res += "<text id=\"text#{id}\" " +
    "style=\"text-anchor: middle; dominant-baseline: middle;\" " +
    "font-family=\"monospace\" font-size=\"1px\" " +
    "x=\"#{(ic.xpos + ic.width/2.0)*@scale}\" "+
    "y=\"#{(ic.ypos + ic.height/2.0+sy)*@scale}\">" +
    ic.name + "</text>\n"
  # Its text resizing.
  res += Viz.svg_text_fit("text#{id}",(ic.width-0.6)*@scale,
                           0.6*@scale)
  return res
end

#right_port_svg(name, type, xpos, ypos, width, height) ⇒ Object

Generate a right port description SVG text.



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# File 'lib/HDLRuby/hruby_viz.rb', line 2514

def right_port_svg(name,type,xpos,ypos,width,height)
  case type
  when :posedge
    res = "<rect fill=\"#88f\" stroke=\"#000\" " 
  when :negedge
    res = "<rect fill=\"#f88\" stroke=\"#000\" " 
  else
    res = "<rect fill=\"#ff0\" stroke=\"#000\" " 
  end
  res += "x=\"#{xpos}\" y=\"#{ypos}\" " + 
    "stroke-width=\"#{@scale/16.0}\" " +
    "width=\"#{width}\" height=\"#{height}\"/>\n"
  res += "<polygon fill=\"#000\" stroke=\"none\" " +
    "points=\"#{xpos},#{ypos} #{xpos+width},#{ypos+height/2.0} " +
    "#{xpos},#{ypos+height}\"/>\n"
  return res
end

#rotate_children(t) ⇒ Object

Rotate the current placement by +t+ radiant



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# File 'lib/HDLRuby/hruby_viz.rb', line 521

def rotate_children(t)
  c = Math.cos(t)
  s = Math.sin(t)
  @children.each do |child|
    xpos = child.xpos
    ypos = child.ypos
    child.xpos = xpos*c + ypos*s
    child.ypos = -xpos*s + ypos*c
  end
end

#route_children ⇒ Object

Perform the route for the placed children. Return false in case of failure.



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# File 'lib/HDLRuby/hruby_viz.rb', line 1716

def route_children
  # Gather the ports to route, in case of failure the list will be
  # reordered and routing will be tried again.
  to_route = []
  @children.each  do |child|
    child.ports.each do |port|
      # Route start from output or inout.
      next if port.direction == :input 
      to_route << port
    end
  end
  # Also for current IC for routes to external, but this time using
  # input or inout as starting point.
  @ports.each do |port|
    # Route start from input or inout.
    next if port.direction == :output
    to_route << port
  end
  # Also handle the same direction output ports joined together
  # (Supported by HDLRuby).
  @ports.each do |port|
    next if port.direction != :output
    if port.targets.all? { |p| !to_route.include?(p) } then
      to_route << port
    end
  end
  # Do the routing.
  failed = nil
  retried = Hash.new {|h,k| h[k] = 0 } # The count of already retried ports.
  # StackProf.run(mode: :cpu, out: 'stackprof-output.dump') do
  # to_route.size.times do |epoch|
  (to_route.size/2).times do |epoch|
    puts "Routing epoch=#{epoch}..."
    self.init_route    # Reinitialize the route matrix.
    routed_pairs = []  # The list of already routed pair of ports.
    @routes = []       # The list of created routes.
    # Do the routing.
    failed = nil
    to_route.each.each do |p0|
      p0.targets.each do |p1|
        next if routed_pairs.include?([p0,p1])
        path = connection_route(p0,p1)
        unless path
          failed = p0
          puts "Could not route from #{p0.name} (IC: #{p0.ic.name}) to #{p1.name}(IC: #{p1.ic.name})"
          break
        end
        routed_pairs << [p0,p1]
        @routes << path
        # And for the case of inouts:
        routed_pairs << [p1,p0] if p1.direction != :input 
      end
      break if failed
    end
    if failed then
      # Was it the first port that failed?
      if to_route.first == failed then
        # Yes, no need to go on.
        break
      end
      # Put the failed port at the head of the list to route and
      # try again.
      to_route.delete(failed)
      retried[failed] += 1
      if retried[failed] > 10 then
        # The failed port has already been retried twice,
        # no need to insist.
        break
      end
      to_route.unshift(failed)
    else
      # Success.
      break
    end
  end
  # end #Stackprof
  # Failure.
  if failed then
    return false
  else
    return true
  end
end

#side_children ⇒ Object

Select the side of the ports of the children according to the position of their targets.



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# File 'lib/HDLRuby/hruby_viz.rb', line 330

def side_children
  @children.each do |child|
    puts "side_children for child=#{child.name} with #{child.ports.size} ports"
    # Resets the port sides.
    child.lports.clear
    child.uports.clear
    child.rports.clear
    child.dports.clear
    # Tell is a side is specifically used for input or output.
    # (Information used for certain types of IC).
    left_for, up_for, right_for, down_for = nil, nil, nil, nil
    # Recompute the ports sides.
    cx = child.xpos
    cy = child.ypos
    child.ports.each do |port|
      puts "For port: #{port.name} (of #{port.ic.name})"
      unless left_for || up_for || right_for || down_for then
        # The side is not forced.
        if port.targets.empty? then
          # Dangling port, put it on the side with the less ports.
          puts "Dangling port: #{port.name} (of #{port.ic.name})"
          pside_by_size = [[child.lports,LEFT],
                           [child.uports,UP],
                           [child.rports,RIGHT],
                           [child.dports,DOWN]].sort do |s0,s1| 
                             s0[0].size <=> s1[0].size
                           end
          port.side = pside_by_size[0][1]
          # pside_by_size[0][0] << port
        else
          # For now, use the first target only for deciding.
          # Note: if the target is the top circuit (self) the the
          # sides are reversed.
          this_port = port.targets[0].ic == self
          if this_port then
            # Current IC, do not use its position, but the side.
            case port.targets[0].side
            when LEFT
              tx = cx + 1.0
              ty = cy
            when UP
              tx = cx
              ty = -cy - 1.0
            when RIGHT
              tx = -cx - 1.0
              ty = cy
            when DOWN
              tx = cx
              ty = cy + 1.0
            end
          else
            tx = port.targets[0].ic.xpos
            ty = port.targets[0].ic.ypos
          end
          dx = cx-tx
          dy = cy-ty
          if dx > 0 then
            if dy > 0 then
              if dx > dy then
                port.side = this_port ? RIGHT : LEFT
              else
                port.side = this_port ? UP : DOWN
              end
            else
              if dx > -dy then
                port.side = this_port ? RIGHT : LEFT
              else
                port.side = this_port ? DOWN : UP
              end
            end
          else
            if dy > 0 then
              if -dx > dy then
                port.side = this_port ? LEFT : RIGHT
              else
                port.side = this_port ? UP : DOWN
              end
            else
              if -dx > -dy then
                port.side = this_port ? LEFT : RIGHT
              else
                port.side = this_port ? DOWN : UP
              end
            end
          end
        end
      end
      # Case of IC of type assign or register if a side is used for
      # output, the opposite must be used for input, and vice versa.
      if child.type == :assign or child.type == :register then
        # puts "left_for=#{left_for} up_for=#{up_for} right_for=#{right_for} down_for=#{down_for}"
        if left_for then
          if port.direction == left_for then
            port.side = LEFT
          else
            port.side = RIGHT
          end
        elsif up_for then
          if port.direction == up_for then
            port.side = UP
          else
            port.side = DOWN
          end
        elsif right_for then
          if port.direction == right_for then
            port.side = RIGHT
          else
            port.side = LEFT
          end
        elsif down_for then
          if port.direction == down_for then
            port.side = DOWN
          else
            port.side = UP
          end
        end
        # Indicate a side is decided.
        case port.side
        when LEFT
          left_for = port.direction
        when UP
          up_for = port.direction
        when RIGHT
          right_for = port.direction
        when DOWN
          down_for = port.direction
        end
      end
      puts "Chosen side=#{port.side}"
      # Update the content of the sides of the children.
      case port.side
      when LEFT
        child.lports << port
      when UP
        child.uports << port
      when RIGHT
        child.rports << port
      when DOWN
        child.dports << port
      end
    end
  end
end

#side_ports ⇒ Object

Select the side of the ports of the current IC according to the position of their targets but limiting the input ports to the left or up and output ports to the right or down.



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# File 'lib/HDLRuby/hruby_viz.rb', line 266

def side_ports
  # Resets the port sides.
  @lports.clear
  @uports.clear
  @rports.clear
  @dports.clear
  @ports.each do |port|
    if port.targets.empty? then
      puts "Dangling port: #{port.name} (of #{port.ic.name})"
      # Not connected port, put it on the side with the less ports.
      if port.direction == :input then
        if lports.size <= uports.size then
          port.side = LEFT
        else
          port.side = UP
        end
      else
        if rports.size <= dports.size then
          port.side = RIGHT
        else
          port.side = DOWN
        end
      end
    else
      # The port is connected.
      if port.direction == :input then
        # For now, use the first target only for deciding.
        d_left  = port.targets[0].ic.xpos - @box[0]
        d_up    = @box[3] - 
          port.targets[0].ic.ypos + port.targets[0].ic.height
        if d_left <= d_up then
          port.side = LEFT
        else
          port.side = UP
        end
      else
        d_right = @box[2] - 
          port.targets[0].ic.xpos + port.targets[0].ic.width
        d_down  = port.targets[0].ic.ypos - @box[1]
        if d_right <= d_down then
          port.side = RIGHT
        else
          port.side = DOWN
        end
      end
    end

    # Update the content of the sides of the children.
    case port.side
    when LEFT
      @lports << port
    when UP
      @uports << port
    when RIGHT
      @rports << port
    when DOWN
      @dports << port
    end
  end
end

#size_children ⇒ Object

Compute the width and height in number of routes for each children in current placement and ports position.



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# File 'lib/HDLRuby/hruby_viz.rb', line 670

def size_children
  @children.each do |child|
    nl = child.lports.size * @port_width
    nu = child.uports.size * @port_width
    nr = child.rports.size * @port_width
    nd = child.dports.size * @port_width
    child.height = nl > nr ? nl : nr
    child.width  = nu > nd ? nu : nd
    puts "First width=#{child.width} height=#{child.height} [#{child.lports.size},#{child.uports.size},#{child.rports.size},#{child.dports.size}]"
    # Ensure IC have some thickness.
    if child.type != :register then
      # For general IC.
      # First at least one-port wide.
      child.height = @port_width if child.height < @port_width
      child.width = @port_width if child.width < @port_width
      # But enlarge if more than one port horizontally or
      # vertically for easier routing and readability.
      if child.lports.size + child.rports.size > 1 and
          child.height == @port_width and
          child.width == @port_width then
        child.width *= 2
      end
      if child.uports.size + child.dports.size > 1 and 
          child.width == @port_width and
          child.height == @port_width then
        child.height *= 2
      end
      # Also ensure the chip is wide enough.
      if child.type == :assign then
        # For an ALU case.
        if child.lports.size > 0 and child.height < 5 then
          child.height = 5
        end
        if child.uports.size > 0 and child.width < 5 then
          child.width = 5
        end
      elsif child.type == :memory then
        # For a memory case: it is square (it is a matrix).
        if child.width > child.height then
          child.height = child.width
        else
          child.width = child.height
        end
      else
        # For the other cases.
        if child.height + child.width < (@port_width+1)*2 then
          child.height += @port_width
        # Also enlarge if area too small.
        end
      end
    else
      # Register are thinner in their representation
      if child.ports.size <= 2 then
        # if they have no sub ports very thin.
        child.height = 2 if child.height < @port_width
        child.width = 2 if child.width < @port_width
      else
        # Otherwise wide enough to write the sub ports.
        child.height = 3 if child.height < @port_width
        child.width = 3 if child.width < @port_width
      end
      puts "for register: #{child.name} ports.size=#{child.ports.size}, width=#{child.width} height=#{child.height}"
    end

  end
end

#size_matrix ⇒ Object

Compute the sizes of the matrix cells in number of routes, then update the size of current IC for matching the matrix.



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# File 'lib/HDLRuby/hruby_viz.rb', line 821

def size_matrix
  # Compute the sizes that fits perfectly the children.
  @rheights = [ 0 ] * @matrix.size
  @cwidths = [ 0 ] * @matrix[0].size
  @matrix.each_with_index do |row,i|
    row.each_with_index do |child,j|
      next unless child
      rh = @rheights[i]
      cw = @cwidths[j]
      @cwidths[j]  = child.width if child.width > cw
      @rheights[i] = child.height if child.height > rh
    end
  end 
  # Increase the space to allow placing the routes.
  nrows = @matrix.size
  ncols = @matrix[0].size
  # @rheights.map! {|h| h + nrows*@cell_border*2 }
  @rheights.map! {|h| h + @cell_border*2 }
  @rheights[0] += @border
  @rheights[-1] += @border
  # @cwidths.map!  {|w| w + ncols*@cell_border*2 }
  @cwidths.map!  {|w| w + @cell_border*2 }
  @cwidths[0] += @border
  @cwidths[-1] += @border
  # Update the size of the current IC.
  @width = @cwidths.reduce(:+) 
  @height = @rheights.reduce(:+)
end

#sub_port?(port) ⇒ Boolean

Tell if a port is a sub-port of a register.

Returns:

  • (Boolean) 


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# File 'lib/HDLRuby/hruby_viz.rb', line 2601

def sub_port?(port)
  return !port.name.sub(self.name,"").sub(/\$(I|O)/,"").empty?
end

#system_svg(ic) ⇒ Object

Generate a system description SVG text for +ic+



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# File 'lib/HDLRuby/hruby_viz.rb', line 2206

def system_svg(ic)
  return "<rect fill=\"#fff\" stroke=\"#000\" " +
    "stroke-width=\"#{@scale/8.0}\" " +
    "x=\"#{ic.xpos*@scale}\" y=\"#{ic.ypos*@scale}\" " +
    "width=\"#{ic.width*@scale}\" "+
    "height=\"#{ic.height*@scale}\"/>\n"
end

#taxi_distance(pos0, pos1) ⇒ Object

Compute the taxi cab distance between +pos0+ and +pos1+



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# File 'lib/HDLRuby/hruby_viz.rb', line 1503

def taxi_distance(pos0,pos1)
  return (pos0[0] - pos1[0]).abs + (pos0[1] - pos1[1]).abs
end

#timed_process_svg(ic) ⇒ Object

Generate a timed process description SVG text for +ic+



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# File 'lib/HDLRuby/hruby_viz.rb', line 2290

def timed_process_svg(ic)
  id = Viz.to_svg_id(ic.name)
  res = "<rect id=\"#{id}\" fill=\"#bbb\" stroke=\"#000\" " +
    "stroke-width=\"#{@scale/8.0}\" " +
    "x=\"#{ic.xpos*@scale}\" y=\"#{ic.ypos*@scale}\" " +
    "rx=\"#{@scale}\" " +
    "width=\"#{ic.width*@scale}\" "+
    "height=\"#{ic.height*@scale}\"/>\n"
  # Its name.
  sy = (ic.lports.size.even? and ic.rports.size.even? ) ? 0 : -0.5 # Shift to avoid ports
  res += "<text id=\"text#{id}\" " +
    "style=\"text-anchor: middle; dominant-baseline: middle;\" " +
    "font-family=\"monospace\" font-size=\"1px\" " +
    "x=\"#{(ic.xpos + ic.width/2.0)*@scale}\" "+
    "y=\"#{(ic.ypos + ic.height/2.0 + sy)*@scale}\">" +
    ic.name + "</text>\n"
  # Its text resizing.
  res += Viz.svg_text_fit("text#{id}",(ic.width-0.6)*@scale,
                           0.6*@scale)
  return res
end

#to_svg(top = true, tx = 0, ty = 0, width = nil, height = nil) ⇒ Object

Generate in SVG format the graphical representation of the IC. +top+ tells if it is the top IC. +tx+ is the x translation of the full description. +ty+ is the y translation of the full description. +width+ is the forced width of the full description if any. +height+ is the forced height of the full description if any.



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# File 'lib/HDLRuby/hruby_viz.rb', line 2631

def to_svg(top = true, tx=0, ty=0, width=nil, height=nil)
  # Compute the various sizes.
  x0,y0, x1,y1 = 0,0, @width*@scale, @height*@scale
  puts "x0,y0, x1,y1 = #{x0},#{y0}, #{x1}, #{y1}"
  bT = (@scale * 1.5)                # Border thickness
  pT = (bT / 5.0)                    # Port thickness
  wT = bT / 30.0                     # Wire thickness
  sF = @scale*0.4                    # Small font height
  mF = @scale*0.6                    # Medium font height
  lF = @scale*1.0                    # Large font height
  width  = (x1-x0)+bT*5 unless width
  height = (y1-y0)+bT*5 unless height
  stx = (width - (x1-x0)) / 2.0 # X translation of the top system
  sty = (height - (y1-y0)) / 2.0 # Y translation of the top system
  puts "bT=#{bT} pT=#{pT} wT=#{wT} width=#{width} height=#{height}"
  # The initial visibility.
  visibility = top ? "visible" : "hidden"
  # The string used as suffix for style class names.
  @idC = "-" + self.name.gsub(/[:$]/,"-")
  # Generate the SVG code.
  if top then
    # It is the top IC.
    # Generate the header.
    res = Viz.header_svg(self.name,x0,y0,width,height)
  else
    # It is not the top, no need of initialization.
    res = ""
  end

  # Sets the styles.
  res += "<style>\n"
  # Fonts
  res += ".small#{self.idC}  { font: #{sF}px sans-serif; }\n"
  res += ".medium#{self.idC} { font: #{mF}px sans-serif; }\n"
  res += ".large#{self.idC}  { font: #{lF}px sans-serif; }\n"
  res += "</style>\n"

  # Generate the group containing all the IC description.
  res += "<g id=\"#{self.name}\" visibility=\"#{visibility}\" " +
         "transform=\"translate(#{tx},#{ty})\">\n"
  # Generate the rectangle of the bounding box.
  res += "<rect fill=\"#bbb\" stroke=\"#555\" " +
    "stroke-width=\"#{@scale/4.0}\" " +
    # "x=\"#{x0-bT*2.5}\" y=\"#{y0-bT*2.5}\" "+
    "x=\"#{x0}\" y=\"#{y0}\" "+
    "width=\"#{width}\" height=\"#{height}\"/>\n"

  # Generate the group containing the top system and its contents.
  res += "<g transform=\"translate(#{stx},#{sty})\">\n"

  # Generate current IC's box.
  # The SVG object representing a system.
  res += system_svg(self)

  # Draw the routes and connection points.
  @route_matrix.each_with_index do |row,y|
    row.each_with_index do |tile,x|
      # # Draw the tiles contour for debug.
      # res += "<rect fill=\"none\" stroke=\"#00F\" " +
      #   "x=\"#{x*@scale}\" " +
      #   "y=\"#{y*@scale}\" " +
      #   "width=\"#{@scale}\" height=\"#{@scale}\"/>\n"
      #
      # Draw the wires.
      tile.wires.each do |wire_dir|
        # puts "wire_dir=#{wire_dir}"
        # Draw the wire (as a thin rectangle).
        case wire_dir
        when LEFT|RIGHT
          res += "<line stroke=\"#000\" stroke-width=\"#{wT}\" " +
            "stroke-linecap=\"round\" " +
            "x1=\"#{(x)*@scale}\" " +
            "y1=\"#{(y+0.5)*@scale}\" " +
            "x2=\"#{(x+1)*@scale}\" " +
            "y2=\"#{(y+0.5)*@scale}\" />\n"
        when RIGHT|DOWN
          res += "<line stroke=\"#000\" stroke-width=\"#{wT}\" " +
            "stroke-linecap=\"round\" " +
            "x1=\"#{(x+1)*@scale}\" " +
            "y1=\"#{(y+0.5)*@scale}\" " +
            "x2=\"#{(x+0.5)*@scale}\" " +
            "y2=\"#{(y)*@scale}\" />\n"
        when RIGHT|UP
          res += "<line stroke=\"#000\" stroke-width=\"#{wT}\" " +
            "stroke-linecap=\"round\" " +
            "x1=\"#{(x+1)*@scale}\" " +
            "y1=\"#{(y+0.5)*@scale}\" " +
            "x2=\"#{(x+0.5)*@scale}\" " +
            "y2=\"#{(y+1)*@scale}\" />\n"
        when LEFT|DOWN
          res += "<line stroke=\"#000\" stroke-width=\"#{wT}\" " +
            "stroke-linecap=\"round\" " +
            "x1=\"#{(x+0.5)*@scale}\" " +
            "y1=\"#{(y)*@scale}\" " +
            "x2=\"#{(x)*@scale}\" " +
            "y2=\"#{(y+0.5)*@scale}\" />\n"
        when LEFT|UP
          res += "<line stroke=\"#000\" stroke-width=\"#{wT}\" " +
            "stroke-linecap=\"round\" " +
            "x1=\"#{(x+0.5)*@scale}\" " +
            "y1=\"#{(y+1)*@scale}\" " +
            "x2=\"#{(x)*@scale}\" " +
            "y2=\"#{(y+0.5)*@scale}\" />\n"
        when UP|DOWN
          res += "<line stroke=\"#000\" stroke-width=\"#{wT}\" " +
            "stroke-linecap=\"round\" " +
            "x1=\"#{(x+0.5)*@scale}\" " +
            "y1=\"#{(y)*@scale}\" " +
            "x2=\"#{(x+0.5)*@scale}\" " +
            "y2=\"#{(y+1)*@scale}\" />\n"
        end
      end

      # Draw the connection points.
      tile.dots.each do |dot_pos|
        res += "<rect fill=\"#000\" stroke=\"#000\" " +
               "stroke-width=\"#{wT}\" "
        case dot_pos
        when LEFT
          res += "x=\"#{(x+0.0)*@scale-wT*2}\" " + 
            "y=\"#{(y+0.5)*@scale-wT*2}\" "
        when UP
          res += "x=\"#{(x+0.5)*@scale-wT*2}\" " + 
            "y=\"#{(y+1.0)*@scale-wT*2}\" "
        when RIGHT
          res += "x=\"#{(x+1.0)*@scale-wT*2}\" " + 
            "y=\"#{(y+0.5)*@scale-wT*2}\" "
        when DOWN
          res += "x=\"#{(x+0.5)*@scale-wT*2}\" " + 
            "y=\"#{(y+0.0)*@scale-wT*2}\" "
        end
        res += "width=\"#{wT*4}\" height=\"#{wT*4}\"/>\n"
      end
    end
  end

  # Generate the children boxes.
  @children.each do |child|
    case child.type
    when :assign
      # The SVG object representing an ALU is to draw.
      res += alu_svg(child)
    when :process
      # The SVG object representing a process is to draw.
      res += process_svg(child)
    when :clocked_process
      # The SVG object representing a cloked process is to draw.
      res += clocked_process_svg(child)
    when :timed_process
      # The SVG object representing a timed process is to draw.
      res += timed_process_svg(child)
    when :register
      # The SVG object representing a register is to draw.
      res += register_svg(child)
    when :memory
      # The SVG object representing a memory is to draw.
      res += memory_svg(child)
    else
      # The SVG object representing an instance is to draw.
      res += instance_svg(child)
    end
  end

  # Generate the port boxes.
  ([ self ] + @children).each do |child|
    # puts "Drawing port for: #{child.name}"
    # Left ports
    child.lports.each_with_index do |port|
      # Draw the port symbol.
      case port.direction
      when :input
        res += self.right_port_svg(port.name,port.type,
                                   port.xpos*@scale-pT/2,
                                   (port.ypos+0.5)*@scale-pT/2,pT,pT)
      when :output
        res += self.left_port_svg(port.name,port.type,
                                  port.xpos*@scale-pT/2,
                                  (port.ypos+0.5)*@scale-pT/2,pT,pT)
      when :inout
        res += self.left_right_port_svg(port.name,port.type,
                                        port.xpos*@scale-pT/2,
                                        (port.ypos+0.5)*@scale-pT/2,pT,pT)
      end
      # And set its name if it is not a register, memory non-sub port,
      # or an undirected port.
      if (child.type != :register and child.type != :memory and
          port.direction != :none) or child.sub_port?(port) then
        if child == self then
          res += "<text class=\"small#{self.idC}\" style=\"text-anchor: end\" " +
            "x=\"#{(port.xpos)*@scale-pT}\" "+
            "y=\"#{(port.ypos+0.5)*@scale+sF/2.5}\">" + # port.name +
            self.port_str(port) + "</text>\n"
        else
          res += "<text class=\"small#{self.idC}\" x=\"#{(port.xpos)*@scale+pT}\" "+
            "y=\"#{(port.ypos+0.5)*@scale+sF/2.5}\">" + # port.name + 
            self.port_str(port) + "</text>\n"
        end
      end
    end
    # Up ports.
    child.uports.each_with_index do |port|
      # puts "uport: #{port.name} xpos=#{port.xpos} ypos=#{port.ypos}"
      case port.direction
      when :input
        res += self.down_port_svg(port.name,port.type,
                                  (port.xpos+0.5)*@scale-pT/2,
                                  (port.ypos+1)*scale-pT/2,pT,pT)
      when :output
        res += self.up_port_svg(port.name,port.type,
                                (port.xpos+0.5)*@scale-pT/2,
                                (port.ypos+1)*scale-pT/2,pT,pT)
      when :inout
        res += self.up_down_port_svg(port.name,port.type,
                                     (port.xpos+0.5)*@scale-pT/2,
                                     (port.ypos+1)*scale-pT/2,pT,pT)
      end
      # And set its name if it is not a register, memory non sub-port,
      # or an undirected port.
      if (child.type != :register and child.type != :memory and
          port.direction != :none) or child.sub_port?(port) then
        if child == self then
          res += "<text class=\"small#{self.idC}\" style=\"text-anchor: middle\" " +
            "x=\"#{(port.xpos+0.5)*@scale}\" "+
            "y=\"#{(port.ypos+1.0)*@scale+pT+sF/2}\">" + # port.name + 
            self.port_str(port) + "</text>\n"
        else
          res += "<text class=\"small#{self.idC}\" style=\"text-anchor: middle\" " +
            "x=\"#{(port.xpos+0.5)*@scale}\" "+
            "y=\"#{(port.ypos+1.0)*@scale-pT}\">" + # port.name +
            self.port_str(port) + "</text>\n"
        end
      end
    end
    # Right ports
    child.rports.each_with_index do |port|
      case port.direction
      when :input
        res += self.left_port_svg(port.name,port.type,
                                  (port.xpos+1)*@scale-pT/2,
                                  (port.ypos+0.5)*scale-pT/2,pT,pT)
      when :output
        res += self.right_port_svg(port.name,port.type,
                                   (port.xpos+1)*@scale-pT/2,
                                   (port.ypos+0.5)*scale-pT/2,pT,pT)
      when :inout
        res += self.left_right_port_svg(port.name,port.type,
                                        (port.xpos+1)*@scale-pT/2,
                                        (port.ypos+0.5)*scale-pT/2,pT,pT)
      end
      # And set its name if it is not a register, memory non sub-port,
      # or an undirected port.
      if (child.type != :register and child.type != :memory and
          port.direction != :none) or child.sub_port?(port) then
        if child == self then
          res += "<text class=\"small#{self.idC}\" " +
            "x=\"#{(port.xpos+1)*@scale+pT}\" " +
            "y=\"#{(port.ypos+0.5)*@scale+sF/2.5}\">" + # port.name +
            self.port_str(port) + "</text>\n"
        else
          res += "<text class=\"small#{self.idC}\" style=\"text-anchor: end\" " +
            "x=\"#{(port.xpos+1)*@scale-pT}\" "+
            "y=\"#{(port.ypos+0.5)*@scale+sF/2.5}\">" + # port.name + 
            self.port_str(port) + "</text>\n"
        end
      end
    end
    # Down ports.
    child.dports.each_with_index do |port|
      case port.direction
      when :input
        res += self.up_port_svg(port.name,port.type,
                                (port.xpos+0.5)*@scale-pT/2,
                                port.ypos*scale-pT/2,pT,pT)
      when :output
        res += self.down_port_svg(port.name,port.type,
                                  (port.xpos+0.5)*@scale-pT/2,
                                  port.ypos*scale-pT/2,pT,pT)
      when :inout
        res += self.up_down_port_svg(port.name,port.type,
                                     (port.xpos+0.5)*@scale-pT/2,
                                     port.ypos*scale-pT/2,pT,pT)
      end
      # And set its name if it is not a register, memory non sub-port,
      # or an undirected port.
      if (child.type != :register and child.type != :memory and
          port.direction != :none) or child.sub_port?(port) then
        if child == self then
          res += "<text class=\"small#{self.idC}\" style=\"text-anchor: middle\" " +
            "x=\"#{(port.xpos+0.5)*@scale}\" "+
            "y=\"#{(port.ypos)*@scale-pT}\">" + # port.name + 
            self.port_str(port) + "</text>\n"
        else
          res += "<text class=\"small#{self.idC}\" style=\"text-anchor: middle\" " +
            "x=\"#{(port.xpos+0.5)*@scale}\" "+
            # "y=\"#{(port.ypos)*@scale+pT+sF}\">" + # port.name + 
            "y=\"#{(port.ypos)*@scale+pT+sF/2.0}\">" + # port.name + 
            self.port_str(port) + "</text>\n"
        end
      end
    end
  end

  # Generate the children's inside if any.
  (@children+@branches).each do |child|
    target = nil
    # Determine the target element to represent.
    case child.type
    when :instance
      target = child.system
    when :assign, :process, :clocked_process, :timed_process
      target = child.branches[0]
    else
      target = child if child.is_a?(Node)
    end
    next unless target # No target? Skip.
    # Compute the child display width.
    cwidth = child.width-pT/@scale
    cheight = child.height-pT/@scale
    # Translate inside the instance.
    ctx = child.xpos + pT/(@scale*2.0)
    cty = child.ypos + pT/(@scale*2.0)
    # For the case of an assign IC (alu), reduce and tranlate a bit
    # on longer side, to accomodate the diagonal borders.
    if child.type == :assign then
      if child.lports.any? then
        cheight -= 2
        cty += 1
      else
        cwidth -= 2
        ctx += 1
      end
    end
    # For the case of a process, reduce and translate a bit on
    # the largest side to accomodate the round borders and usually long
    # dataflow represented.
    if [:process, 
        :clocked_process, :timed_process].include?(child.type) then
      if cwidth >= cheight then
        cwidth -= 2
        ctx += 1
      else
        cheight -= 2
        cty += 1
      end
    end
    # Leave a space for left or right ports if any.
    sl = child.ports.any? {|p| p.side == LEFT } ? 1.0 : 0.0
    sr = child.ports.any? {|p| p.side == RIGHT } ? 1.0 : 0.0
    # Recompute the scale.
    fit = [
      (target.width+sl+sr+(bT/@scale)) / (cwidth),
      (target.height+(bT/@scale)) / (cheight),
      3.0
    ].max
    target.scale = @scale / fit
    puts "fit=#{fit} target.scale=#{target.scale}"
    puts "child.xpos=#{child.xpos} child.ypos=#{child.ypos} ctx=#{ctx} cty=#{cty}"
    res += target.to_svg(false,ctx*@scale,cty*@scale,
                         cwidth*scale,cheight*scale)
    # Generate the closing button element.
    res += Viz.closing_svg(target.name + '_close',pT,(ctx+cwidth)*@scale-pT,cty*@scale)
  end

  # Close the group containing the top system and its content.
  res += "</g>\n"
  # Close the group containing the description of the IC.
  res += "</g>\n"

  # Generate the scripts for controlling the appearance of the
  # children' and contents' inside.
  (@children+@branches).each do |child|
    target = nil
    # Determine the target element to represent.
    case child.type
    when :instance
      target = child.system
    when :assign, :process, :clocked_process, :timed_process
      target = child.branches[0]
    else
      target = child if child.is_a?(Node)
    end
    next unless target # No target? Skip.
    res += <<~SCRIPT
<script>
diagram.getElementById('#{child.name}').addEventListener("click", (e) => {
// For the element.
let elem = diagram.getElementById('#{target.name}');
elem.setAttribute('visibility','visible');
// And its closing button.
elem = diagram.getElementById('#{target.name}_close');
elem.setAttribute('visibility','visible');
});
diagram.getElementById('#{target.name}_close').addEventListener("click", (e) => {
// For the element.
let elem = diagram.getElementById('#{target.name}');
elem.setAttribute('visibility','hidden');
// And its closing button.
elem = diagram.getElementById('#{target.name}_close');
elem.setAttribute('visibility','hidden');
});

</script>
      SCRIPT
  end

  if top then
    # It is the top so generate the help panel and close the SVG.
    res += Viz.help_svg(x0,y0,width,height)
    res += "</svg>\n"
  end
  return res
end

#touch?(pos0, pos1) ⇒ Boolean

Tell if two positions touch each other (diagonal touch is not considered valid).

Returns:

  • (Boolean) 


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# File 'lib/HDLRuby/hruby_viz.rb', line 1641

def touch?(pos0,pos1)
  return (((pos0[0]-pos1[0]).abs < 2 and pos0[1] == pos1[1]) or
          ((pos0[1]-pos1[1]).abs < 2 and pos0[0] == pos1[0]))
end

#up_down_port_svg(name, type, xpos, ypos, width, height) ⇒ Object

Generate an up-down port description SVG text.



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# File 'lib/HDLRuby/hruby_viz.rb', line 2586

def up_down_port_svg(name,type,xpos,ypos,width,height)
  res = "<rect fill=\"#FF0\" stroke=\"#000\" " +
    "x=\"#{xpos}\" y=\"#{ypos}\" " + 
    "stroke-width=\"#{@scale/16.0}\" " +
    "width=\"#{width}\" height=\"#{height}\"/>\n"
  res += "<polygon fill=\"#000\" stroke=\"none\" " +
    "points=\"#{xpos},#{ypos} #{xpos+width/2},#{ypos+height} " +
    "#{xpos+width},#{ypos}\"/>\n"
  res += "<polygon fill=\"#000\" stroke=\"none\" " +
    "points=\"#{xpos+width/2.0},#{ypos} #{xpos},#{ypos+height} " +
    "#{xpos+width},#{ypos+height}\"/>\n"
  return res
end

#up_port_svg(name, type, xpos, ypos, width, height) ⇒ Object

Generate an up port description SVG text.



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# File 'lib/HDLRuby/hruby_viz.rb', line 2548

def up_port_svg(name,type,xpos,ypos,width,height)
  case type
  when :posedge
    res = "<rect fill=\"#88f\" stroke=\"#000\" " 
  when :negedge
    res = "<rect fill=\"#f88\" stroke=\"#000\" " 
  else
    res = "<rect fill=\"#ff0\" stroke=\"#000\" " 
  end
  res += "x=\"#{xpos}\" y=\"#{ypos}\" " + 
    "stroke-width=\"#{@scale/16.0}\" " +
    "width=\"#{width}\" height=\"#{height}\"/>\n"
  res += "<polygon fill=\"#000\" stroke=\"none\" " +
    "points=\"#{xpos},#{ypos} #{xpos+width/2.0},#{ypos+height} " +
    "#{xpos+width},#{ypos}\"/>\n"
  return res
end

#wire_route_tiles ⇒ Object

Generate the wiring and connection content of the tiles.



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# File 'lib/HDLRuby/hruby_viz.rb', line 1802

def wire_route_tiles
  # The table of route segments per tiles, used for determining the
  # connection points.
  tile_segs = Hash.new {|h,k| h[k] = [] }

  # Wire the routes.
  @routes.each do |route|
    port0 = route.ports[0] # The routed start port.
    port1 = route.ports[1] # The routed end port.
    # Add the start and end port position to the route.
    sport,eport = *route.ports
    if sport.ic != self then
      route.path.unshift([sport.xpos,sport.ypos])
    else
      case sport.side
      when LEFT
        route.path.unshift([sport.xpos-1,sport.ypos])
      when UP
        route.path.unshift([sport.xpos,sport.ypos+1])
      when RIGHT
        route.path.unshift([sport.xpos+1,sport.ypos])
      when DOWN
        route.path.unshift([sport.xpos,sport.ypos-1])
      end
    end
    if eport.ic != self then
      route.path.append([eport.xpos,eport.ypos])
    else
      case eport.side
      when LEFT
        route.path.append([eport.xpos-1,eport.ypos])
      when UP
        route.path.append([eport.xpos,eport.ypos+1])
      when RIGHT
        route.path.append([eport.xpos+1,eport.ypos])
      when DOWN
        route.path.append([eport.xpos,eport.ypos-1])
      end
    end
    route.path.each_cons(3).with_index do |((x0,y0),(x1,y1),(x2,y2)),i|
      # puts "x0,y0=#{x0},#{y0} x1,y1=#{x1},#{y1} x2,y2=#{x2},#{y2}"
      # puts "i=#{i} dir=#{dir}"
      dir = 0
      dir |= RIGHT if x0 > x1 || x1 < x2
      dir |= LEFT  if x0 < x1 || x1 > x2
      dir |= UP    if y0 > y1 || y1 < y2
      dir |= DOWN  if y0 < y1 || y1 > y2
      # Set the wire.
      @route_matrix[y1][x1].wires << dir
      # Update the list of segments. It will be used later for 
      # determining the connection points.
      # NOTE: if it is a head or tail of route, there is no dir.
      tile_segs[[x1,y1]] << dir if dir
    end
  end

  # Generate the connection points.
  tile_segs.each do |(x,y),segs|
    # Keep one uniq element per undirected direction.
    # segs = segs.map { |dir| UNDIRECTED[dir] }.uniq
    segs = segs.uniq
    # Determin the fork position if any.
    puts "segs=#{segs}" if segs.size > 1
    fork_pos = nil
    if    (segs & [ LEFT|RIGHT, LEFT|UP]).size == 2 then
      fork_pos = LEFT
    elsif (segs & [ LEFT|RIGHT, LEFT|DOWN]).size == 2 then
      fork_pos = LEFT
    elsif (segs & [ LEFT|UP, LEFT|DOWN]).size == 2 then
      fork_pos = LEFT
    elsif (segs & [ UP|DOWN, UP|LEFT]).size == 2 then
      fork_pos = UP
    elsif (segs & [ UP|DOWN, UP|RIGHT]).size == 2 then
      fork_pos = UP
    elsif (segs & [ UP|LEFT, UP|RIGHT]).size == 2 then
      fork_pos = UP
    elsif (segs & [ RIGHT|LEFT, RIGHT|UP]).size == 2 then
      fork_pos = RIGHT
    elsif (segs & [ RIGHT|LEFT, RIGHT|DOWN]).size == 2 then
      fork_pos = RIGHT
    elsif (segs & [ RIGHT|UP, RIGHT|DOWN]).size == 2 then
      fork_pos = RIGHT
    elsif (segs & [ DOWN|UP, DOWN|LEFT]).size == 2 then
      fork_pos = DOWN
    elsif (segs & [ DOWN|UP, DOWN|RIGHT]).size == 2 then
      fork_pos = DOWN
    elsif (segs & [ DOWN|LEFT, DOWN|RIGHT]).size == 2 then
      fork_pos = DOWN
    end
    if fork_pos then
      puts "x=#{x} y=#{y} segs=#{segs} fork_pos=#{fork_pos}"
      # Set the connection point.
      @route_matrix[y][x].dots << fork_pos
    end
  end
end

#xrate(ic0, ic1) ⇒ Object 



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# File 'lib/HDLRuby/hruby_viz.rb', line 161

def xrate(ic0,ic1)
  d = distance(ic0,ic1)
  # Ensure d is not 0 to avoid infinity.
  d = EPSILON if d < EPSILON
  res = (ic0.xpos-ic1.xpos)/d
  # puts "ic0.xpos=#{ic0.xpos} ic1.xpos=#{ic1.xpos} xrate=#{res}"
  return res
end

#yrate(ic0, ic1) ⇒ Object 



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# File 'lib/HDLRuby/hruby_viz.rb', line 170

def yrate(ic0,ic1)
  d = distance(ic0,ic1)
  # Ensure d is not 0 to avoid infinity.
  d = EPSILON if d < EPSILON
  res = (ic0.ypos-ic1.ypos)/d
  return res
end