The recursive MACRO-10 test case (MACTEST1.MAC) found in the June 1972 MACRO-10 manual passes now
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; From the MACR0-10 ASSEMBLER PROGRAMMER'S REFERENCE MANUAL (June 1972):
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;
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; Example 4 (Figure 7-4) shows nested macros which use IRPC. The desired operation
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; is to take an ASCII text string and store the characters four per word, left-justified,
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; with the character count stored in the first nine bits of the first word.
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;
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; The TEXT macro counts the string characters and invokes the CODE macro to store the
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; characters four per word. The CODE macro invokes a SHIFT macro which left-justifies the
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; last word if it is not already left-justified. The first part of the example shows the
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; normal listing, then SALL is set to show what code the macros are generating.
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;
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; The original listing encodes the following two lines as follows:
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;
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; IFN ZZ,<DEFINE SHIFT ;;REMAINDER LEFT
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; IFE ZZ&777B8,> ;;IF NOT LEFT JUSTIFIED
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;
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; The April 1978 MACRO-10 manual says that a macro body "must be enclosed in angle brackets",
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; so I'm not sure how the above lines make sense.
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;
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TITLE STORE TEXT CHARACTER BY CHARACTER
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SUBTTL %1 5-APR-72
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DEFINE TEXT (C)<
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N==0 ;;INITIAL CONDITION
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IRPC C,<N==N+1> ;;COUNT CHARACTERS
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CODE (N,C) ;;CALL MACRO TO STORE TEXT
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> ;END OF TEXT MACRO
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DEFINE CODE (N,C)<
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ZZ==N ;;INITIAL CONDITION
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IRPC C,<
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IFN ZZ&777B8,<
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EXP ZZ ;;WORD FULL
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ZZ==0> ;;START AGAIN WITH 0
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ZZ==ZZ_9+"C"> ;;END OF IRPC
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IFN ZZ,<DEFINE SHIFT< ;;REMAINDER LEFT
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IFE ZZ&777B8,< ;;IF NOT LEFT JUSTIFIED
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ZZ==ZZ_9 ;;MOVE LEFT 9 BITS
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SHIFT> ;;RECURSE
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> ;;END OF DEFINE
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SHIFT ;;START MOVING LEFT
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EXP ZZ> ;;END OF IFN ZZ
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> ;END OF CODE MACRO
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TEXT (ABCDEFGHIJKL)
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END
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