as: Irpc

 
 7.50 '.irpc SYMBOL,VALUES'...
 =============================
 
 Evaluate a sequence of statements assigning different values to SYMBOL.
 The sequence of statements starts at the '.irpc' directive, and is
 terminated by an '.endr' directive.  For each character in VALUE, SYMBOL
 is set to the character, and the sequence of statements is assembled.
 If no VALUE is listed, the sequence of statements is assembled once,
 with SYMBOL set to the null string.  To refer to SYMBOL within the
 sequence of statements, use \SYMBOL.
 
    For example, assembling
 
              .irpc    param,123
              move    d\param,sp@-
              .endr
 
    is equivalent to assembling
 
              move    d1,sp@-
              move    d2,sp@-
              move    d3,sp@-
 
    For some caveats with the spelling of SYMBOL, see also the discussion
 at SeeMacro.