Contents

require 'spec'

module RegisterInterface
  NUM_REGS = Register_file.register.size

  def set_registers(vals)
    raise ArgumentError if vals.length > NUM_REGS

    Register_file.rw.intVal = 1

    vals.each_with_index do |val, i|
      Register_file.wtReg.intVal = i
      Register_file.inBus.intVal = val
      Register_file.cycle!
    end
  end

  def expect_registers(vals)
    raise ArgumentError if vals.length > NUM_REGS

    Register_file.rw.intVal = 0

    vals.each_with_index do |val, i|
      Register_file.rdReg.intVal = i
      Register_file.cycle!
      Register_file.outBus.intVal.should == val
    end
  end
end

describe "An enabled register file" do
  include RegisterInterface

  before do
    Register_file.reset!
    Register_file.enable.intVal = 1
  end

  it "should be able to write and then read registers" do
    testVals = [1, 7, 3, 12]

    set_registers(testVals)
    expect_registers(testVals)
  end
end

describe "A disabled register file" do
  include RegisterInterface

  before do
    Register_file.reset!
    Register_file.enable.intVal = 0
  end

  it "should not write new values" do
    zeros    = [0, 0, 0, 0]
    testVals = [1, 7, 3, 12]

    set_registers(testVals)
    expect_registers(zeros)
  end
end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
ruby-vpi-18.0.0	samp/register_file/register_file_spec.rb
ruby-vpi-19.0.0	examples/register_file/register_file_spec.rb
ruby-vpi-18.0.1	samp/register_file/register_file_spec.rb
ruby-vpi-18.0.2	samp/register_file/register_file_spec.rb