135 lines
5.3 KiB
Ruby
135 lines
5.3 KiB
Ruby
module Risc
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module Builtin
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class Object
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module ClassMethods
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include CompileHelper
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# self[index] basically. Index is the first arg
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# return is stored in return_value
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# (this method returns a new method off course, like all builtin)
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def get_internal_word( context )
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compiler = compiler_for(:Object , :get_internal_word ,{at: :Integer})
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compiler.compiler_builder(compiler.source).build do
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object << message[:receiver]
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integer << message[:arguments]
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integer << integer_reg[1]
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integer.reduce_int
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object << object[integer]
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message[:return_value] << object
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end
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compiler.add_mom( Mom::ReturnSequence.new)
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return compiler
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end
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# self[index] = val basically. Index is the first arg , value the second
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# no return
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def set_internal_word( context )
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compiler = compiler_for(:Object , :set_internal_word , {at: :Integer, :value => :Object} )
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compiler.compiler_builder(compiler.source).build do
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object << message[:receiver]
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integer << message[:arguments]
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object_reg << integer[ 2]
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integer << integer[ 1]
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integer.reduce_int
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object[integer] << object_reg
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message[:return_value] << object_reg
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end
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compiler.add_mom( Mom::ReturnSequence.new)
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return compiler
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end
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# every object needs a method missing.
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# Even if it's just this one, sys_exit (later raise)
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def _method_missing( context )
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compiler = compiler_for(:Object,:method_missing ,{})
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emit_syscall( compiler.compiler_builder(compiler.source) , :exit )
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return compiler
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end
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# this is the really really first place the machine starts (apart from the jump here)
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# it isn't really a function, ie it is jumped to (not called), exits and may not return
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# so it is responsible for initial setup
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def __init__ context
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compiler = MethodCompiler.compiler_for_class(:Object,:__init__ ,
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Parfait::NamedList.type_for({}) , Parfait::NamedList.type_for({}))
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builder = compiler.compiler_builder(compiler.source)
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builder.build do
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space << Parfait.object_space
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message << space[:next_message]
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next_message << message[:next_message]
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space[:next_message] << next_message
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end
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Mom::MessageSetup.new(Parfait.object_space.get_main).build_with( builder )
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builder.build do
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message << message[:next_message]
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message[:receiver] << space
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end
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exit_label = Risc.label(compiler.source , "#{compiler.receiver_type.object_class.name}.#{compiler.source.name}" )
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ret_tmp = compiler.use_reg(:Label)
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builder.build do
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add_load_constant("__init__ load return", exit_label , ret_tmp)
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add_reg_to_slot("__init__ store return", ret_tmp , Risc.message_reg , :return_address)
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add_function_call( "__init__ issue call" , Parfait.object_space.get_main)
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add_code exit_label
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end
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compiler.reset_regs
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exit_sequence(builder)
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return compiler
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end
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# a sort of inline version of exit method.
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# Used by exit and __init__ (so it doesn't have to call it)
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def exit_sequence(builder)
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save_message( builder )
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builder.add_slot_to_reg "get return" , Risc.message_reg , :return_value , Risc.message_reg
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builder.reduce_int( "reduce return" , Risc.message_reg)
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builder.add_code Syscall.new("emit_syscall(exit)", :exit )
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end
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def exit( context )
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compiler = compiler_for(:Object,:exit ,{})
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builder = compiler.compiler_builder(compiler.source)
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exit_sequence(builder)
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return compiler
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end
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def emit_syscall( builder , name )
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save_message( builder )
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builder.add_code Syscall.new("emit_syscall(#{name})", name )
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restore_message(builder)
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return unless (@clazz and @method)
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builder.add_code Risc.label( "#{@clazz.name}.#{@message.name}" , "return_syscall" )
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end
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# save the current message, as the syscall destroys all context
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#
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# This relies on linux to save and restore all registers
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#
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def save_message(builder)
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r8 = RegisterValue.new( :r8 , :Message)
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builder.add_code Risc.transfer("save_message", Risc.message_reg , r8 )
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end
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def restore_message(builder)
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r8 = RegisterValue.new( :r8 , :Message)
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return_tmp = builder.compiler.use_reg :fixnum
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source = "_restore_message"
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# get the sys return out of the way
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builder.add_code Risc.transfer(source, Risc.message_reg , return_tmp )
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# load the stored message into the base register
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builder.add_code Risc.transfer(source, r8 , Risc.message_reg )
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int = builder.compiler.use_reg(:Integer)
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builder.add_new_int(source , return_tmp , int )
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# save the return value into the message
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builder.add_code Risc.reg_to_slot( source , int , Risc.message_reg , :return_value )
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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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