77 lines
2.9 KiB
Ruby
77 lines
2.9 KiB
Ruby
#integer related kernel functions
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module Risc
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module Builtin
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module Integer
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module ClassMethods
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include AST::Sexp
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def mod4 context
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compiler = Risc::MethodCompiler.create_method(:Integer,:mod4 ).init_method
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return compiler.method
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end
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def putint context
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compiler = Risc::MethodCompiler.create_method(:Integer,:putint ).init_method
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return compiler.method
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end
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def div10 context
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s = "div_10"
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compiler = Risc::MethodCompiler.create_method(:Integer,:div10 ).init_method
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me = compiler.add_known( :receiver )
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tmp = compiler.add_known( :receiver )
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q = compiler.add_known( :receiver )
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const = compiler.use_reg :Integer , 1
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compiler.add_load_constant( s, 1 , const )
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# int tmp = self >> 1
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compiler.add_code Risc.op( s , ">>" , tmp , const)
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# int q = self >> 2
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compiler.add_load_constant( s , 2 , const)
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compiler.add_code Risc.op( s , ">>" , q , const)
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# q = q + tmp
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compiler.add_code Risc.op( s , "+" , q , tmp )
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# tmp = q >> 4
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compiler.add_load_constant( s , 4 , const)
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compiler.add_transfer( s, q , tmp)
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compiler.add_code Risc.op( s , ">>" , tmp , const)
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# q = q + tmp
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compiler.add_code Risc.op( s , "+" , q , tmp )
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# tmp = q >> 8
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compiler.add_load_constant( s , 8 , const)
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compiler.add_transfer( s, q , tmp)
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compiler.add_code Risc.op( s , ">>" , tmp , const)
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# q = q + tmp
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compiler.add_code Risc.op( s , "+" , q , tmp )
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# tmp = q >> 16
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compiler.add_load_constant( s , 16 , const)
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compiler.add_transfer( s, q , tmp)
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compiler.add_code Risc.op( s , ">>" , tmp , const)
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# q = q + tmp
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compiler.add_code Risc.op( s , "+" , q , tmp )
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# q = q >> 3
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compiler.add_load_constant( s , 3 , const)
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compiler.add_code Risc.op( s , ">>" , q , const)
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# tmp = q * 10
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compiler.add_load_constant( s , 10 , const)
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compiler.add_transfer( s, q , tmp)
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compiler.add_code Risc.op( s , "*" , tmp , const)
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# tmp = self - tmp
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compiler.add_code Risc.op( s , "-" , me , tmp )
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compiler.add_transfer( s , me , tmp)
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# tmp = tmp + 6
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compiler.add_load_constant( s , 6 , const)
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compiler.add_code Risc.op( s , "+" , tmp , const )
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# tmp = tmp >> 4
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compiler.add_load_constant( s , 4 , const)
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compiler.add_code Risc.op( s , ">>" , tmp , const )
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# return q + tmp
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compiler.add_code Risc.op( s , "+" , q , tmp )
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compiler.add_reg_to_slot( s , q , :message , :return_value)
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return compiler.method
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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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