83 lines
2.1 KiB
Ruby
83 lines
2.1 KiB
Ruby
require_relative "code"
|
|
|
|
module Vm
|
|
|
|
# Values represent the information as it is processed. Different subclasses for different types,
|
|
# each type with different operations.
|
|
# The oprerations on values is what makes a machine do things.
|
|
# For compilation, values are moved to the machines registers and the methods (on values) map
|
|
# to machine instructions
|
|
|
|
# Values are immutable! (that's why they are called values)
|
|
# Operations on values _always_ produce new values (conceptionally)
|
|
|
|
# Values are a way to reason about (create/validate) instructions.
|
|
# In fact a linked lists of values is created by invoking instructions
|
|
# the linked list goes from value to instruction to value, backwards
|
|
|
|
# Word Values are what fits in a register. Derived classes
|
|
# Float, Reference , Integer(s) must fit the same registers
|
|
|
|
# just a base class for data. not sure how this will be usefull (may just have read too much llvm)
|
|
class Value < Code
|
|
|
|
|
|
def type
|
|
self.class
|
|
end
|
|
end
|
|
|
|
# Just a nice way to write branches
|
|
class Bool < Value
|
|
|
|
end
|
|
|
|
# This is what it is when we don't know what it is.
|
|
# Must be promoted to A Word-Value to to anything
|
|
# remembering that our oo machine is typed, no overloading or stuff
|
|
class Word < Value
|
|
|
|
attr_accessor :register
|
|
|
|
def inspect
|
|
self.class.name + ":reg:#{register}:"
|
|
end
|
|
def initialize reg
|
|
@register = reg
|
|
end
|
|
def length
|
|
4
|
|
end
|
|
end
|
|
|
|
class Unsigned < Word
|
|
|
|
def plus block , unsigned
|
|
CMachine.instance.unsigned_plus self , unsigned
|
|
end
|
|
end
|
|
|
|
class Integer < Word
|
|
|
|
def less_or_equal block , right
|
|
CMachine.instance.integer_less_or_equal block , self , right
|
|
end
|
|
|
|
def plus block , right
|
|
CMachine.instance.integer_plus block , self , right
|
|
end
|
|
def minus block , right
|
|
CMachine.instance.integer_minus block , self , right
|
|
end
|
|
|
|
def load block , right
|
|
CMachine.instance.integer_load block , self , right
|
|
end
|
|
|
|
def move block , right
|
|
CMachine.instance.integer_move block , self , right
|
|
end
|
|
|
|
end
|
|
end
|
|
require_relative "constants" |