33 lines
1.0 KiB
Ruby
33 lines
1.0 KiB
Ruby
module Risc
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# dynamic version of an Branch that jumps to the contents
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# of a register instead of a hardcoded address
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# As Branches jump to Labels, this is not derived from Branch
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# PS: to conditionally jump to a dynamic adddress we do a normal branch
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# over the dynamic one and then a dynamic one. Save us having all types of branches
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# in two versions
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class DynamicJump < Instruction
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def initialize( source , register )
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super(source)
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@register = register
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end
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attr_reader :register
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# return an array of names of registers that is used by the instruction
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def register_attributes
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[:register ]
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end
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def to_s
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class_source( register.to_s)
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end
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end
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# A Dynamic yield is very much like a DynamicJump, especially in it's idea
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#
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# The implentation differes slightly, as we use a chache entry in the DynamicJump
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# but a block in the DynamicYield.
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# Using means that we assume the register to be ready loaded with a Block
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class DynamicYield < DynamicJump
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end
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end
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