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Spec goto
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@ -291,11 +291,12 @@ current routine, and it continues to be initialized afterwards.
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Transfers execution to the given executable, whether that is a previously-
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defined routine, or a vector location which contains the address of a routine
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which will be called indirectly.
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which will be called indirectly. Execution will be transferred back to the
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current routine, when execution of the executable is finished.
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Just before the call,
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* It is illegal if any of the memory locations in the called routine's
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* It is illegal if any of the memory locations in the target executable's
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READS list is uninitialized.
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Just after the call,
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@ -305,6 +306,28 @@ Just after the call,
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* All memory locations listed as TRASHED in the called routine's OUTPUTS
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list are considered initialized.
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### goto ###
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goto <executable-name>
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Unilaterally transfers execution to the given executable. Execution will not
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be transferred back to the current routine when execution of the executable is
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finished; rather, it will be transferred back to the caller of the current
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routine.
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If `goto` is used in a routine, it must be in tail position. That is, it
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must be the final instruction in the routine.
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Just before the goto,
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* It is illegal if any of the memory locations in the target executable's
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READS list is uninitialized.
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In addition,
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* The target executable's WRITES lists must not include any locations
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that are not already included in the current routine's WRITES lists.
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### if ###
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if <src-memory-location> {
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@ -363,10 +386,6 @@ copy more general types of data (for example, vectors,) and it trashes the
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After execution, dest is considered initialized, and `z` and `n`, and
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`a` are considered uninitialized.
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### goto ###
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TBW
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Grammar
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-------
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