50 lines
1.5 KiB
Factor
50 lines
1.5 KiB
Factor
USING: help.markup help.syntax kernel layouts slots.private ;
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IN: compiler.cfg.instructions
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HELP: vreg-insn
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{ $class-description
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"Base class for instructions that uses vregs."
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} ;
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HELP: ##inc-d
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{ $class-description
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"An instruction that increases or decreases the data stacks size by n. For example, " { $link 2drop } " decreases it by two and pushing an item increases it by one."
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} ;
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HELP: ##set-slot
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{ $class-description
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"An instruction for non-primitive non-immediate variant of " { $link set-slot } ". It has the following slots:"
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{ $table
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{ { $slot "src" } { "Object to put in the slot." } }
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{ { $slot "obj" } { "Object to set the slot on." } }
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{ { $slot "slot" } { "Slot index." } }
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{ { $slot "tag" } { "Type tag for obj." } }
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}
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}
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{ $see-also ##set-slot-imm } ;
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HELP: ##replace-imm
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{ $class-description
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"An instruction that replaces an item on the data or register stack with an " { $link immediate } " value." } ;
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HELP: ##replace
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{ $class-description
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"Copies a value from a machine register to a stack location." }
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{ $see-also ##peek ##replace-imm } ;
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HELP: ##jump
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{ $class-description
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"An uncondiation jump instruction. It has the following slots:"
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{ $table
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{ { $slot "word" } { "Word whose address the instruction is jumping to." } }
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}
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"Note that the optimizer is sometimes able to optimize away a " { $link ##call } " and " { $link ##return } " pair into one ##jump instruction."
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} ;
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HELP: ##peek
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{ $class-description
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"Copies a value from a stack location to a machine register."
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}
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{ $see-also ##replace } ;
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