108 lines
4.7 KiB
Ruby
108 lines
4.7 KiB
Ruby
#integer related kernel functions
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module Register
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module Builtin
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module Integer
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module ClassMethods
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def plus c
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plus_function = Virtual::MethodSource.create_method(:Integer,:plus , [:Integer] )
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plus_function.source.return_type = Virtual::Integer
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plus_function.source.receiver = Virtual::Integer
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plus_function.source.add_code Register::OperatorInstruction.new( plus_function, :add , 0 , 0 )
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return plus_function
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end
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# The conversion to base10 is quite a bit more complicated than i thought.
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# The bulk of it is in div10
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# We set up variables, do the devision and write the result to the string
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# then check if were done and recurse if neccessary
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# As we write before we recurse (save a push) we write the number backwards
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# arguments: string address , integer
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# def utoa context
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# utoa_function = Virtual::MethodSource.create_method(:Integer ,:utoa , [ Virtual::Integer ] )
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# function.source.return_type = Virtual::Integer
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# function.source.receiver = Virtual::Integer
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# return utoa_function
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# # str_addr = utoa_function.receiver
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# # number = utoa_function.args.first
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# # remainder = utoa_function.new_local
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# # Virtual::RegisterMachine.instance.div10( utoa_function , number , remainder )
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# # # make char out of digit (by using ascii encoding) 48 == "0"
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# # utoa_function.instance_eval do
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# # add( remainder , remainder , 48)
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# # strb( remainder, str_addr )
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# # sub( str_addr, str_addr , 1 )
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# # cmp( number , 0 )
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# # callne( utoa_function )
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# # end
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# # return utoa_function
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# end
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def putint context
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putint_function = Virtual::MethodSource.create_method(:Integer,:putint , [] )
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putint_function.source.return_type = Virtual::Integer
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putint_function.source.receiver = Virtual::Integer
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return putint_function
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# buffer = Parfait::Word.new(" ") # create a buffer
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# context.object_space.add_object buffer # and save it (function local variable: a no no)
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# int = putint_function.receiver
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# moved_int = putint_function.new_local
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# utoa = context.object_space.get_class_by_name(:Object).resolve_method(:utoa)
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# putint_function.instance_eval do
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# mov( moved_int , int ) # move arg up
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# add( int , buffer ,nil ) # string to write to (add string address to pc)
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# add( int , int , buffer.length - 3) # 3 for good measure , ahem.
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# call( utoa )
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# after = new_block("after_call")
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# insert_at after
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# # And now we "just" have to print it, using the write_stdout
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# add( int , buffer , nil ) # string to write to
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# mov( moved_int , buffer.length )
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# end
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# Virtual::RegisterMachine.instance.write_stdout(putint_function)
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# putint_function
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end
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# testing method, hand coded fibo, expects arg in receiver_register
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# result comes in return_register
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# a hand coded version of the fibonachi numbers
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# not my hand off course, found in the net http://www.peter-cockerell.net/aalp/html/ch-5.html
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def fibo context
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fibo_function = Virtual::MethodSource.create_method(:Integer,:fibo , [] )
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fibo_function.source.return_type = Virtual::Integer
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fibo_function.source.receiver = Virtual::Integer
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return fibo_function
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# result = fibo_function.return_type
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# int = fibo_function.receiver
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#
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# last = fibo_function.new_block("return")
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#
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# f1 = fibo_function.new_local
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# f2 = fibo_function.new_local
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#
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# fibo_function.instance_eval do
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# cmp int , 1
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# mov( result, int , condition_code: :le)
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# ble( last ) #branch to return, rather than return (as the original)
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# mov f1 , 1 #set up initial values
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# mov f2 , 0
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# end
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#
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# loop = fibo_function.new_block("loop")
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# fibo_function.insert_at loop
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#
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# fibo_function.instance_eval do #loop through
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# add f1 , f1 , f2 # f1 = f1 + f2
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# sub f2 , f1 , f2 # f2 = f1 -f2
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# sub int , int , 1 # todo: set.. should do below cmp, but doesn't , set_update_status: 1
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# cmp int , 1
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# bne( loop )
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# mov( result , f1 )
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# end
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#
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# fibo_function
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end
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end
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extend ClassMethods
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end
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end
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end
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