68 lines
2.4 KiB
Ruby
68 lines
2.4 KiB
Ruby
module SlotMachine
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class Macro < Instruction
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def to_s
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self.class.name.split("::").last
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end
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# emit the syscall with given name
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# there is a Syscall instruction, but the message has to be saved and restored
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def self.emit_syscall( builder , name )
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save_message( builder )
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builder.add_code Risc::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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# 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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# Assumes int return value and extracts the fixnum for process exit code
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def self.exit_sequence(builder)
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save_message( builder )
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unix_return = Risc.syscall_reg(1).set_compiler(builder.compiler)
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builder.build do
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unix_return << message[:return_value].reduce_int(false) #hack, noo type check
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add_code Risc::Syscall.new("emit_syscall(exit)", :exit )
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end
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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 self.save_message(builder)
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r8 = Risc::RegisterValue.new( :saved_message , :Message).set_compiler(builder.compiler)
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builder.build {r8 << message}
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end
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# restore the message that we save in r8
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# before th restore, the syscall return, a fixnum, is saved
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# The caller of this method is assumed to caal prepare_int_return
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# so that the return value already has an integer instance
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# This instance is filled with os return value
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def self.restore_message(builder)
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r8 = Risc::RegisterValue.new( :saved_message , :Message).set_compiler(builder.compiler)
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tmp = Risc::RegisterValue.new( :restore_integer_return , :Integer).set_compiler(builder.compiler)
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builder.build do
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tmp << Risc.syscall_reg(1)
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message << r8
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message[:return_value][Parfait::Integer.integer_index] << tmp
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end
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end
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end
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end
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require_relative "comparison"
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require_relative "exit"
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require_relative "init"
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require_relative "putstring"
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require_relative "set_internal_word"
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require_relative "div10"
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require_relative "get_internal_byte"
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require_relative "method_missing"
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require_relative "div4"
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require_relative "get_internal_word"
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require_relative "operator"
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require_relative "set_internal_byte"
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