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==360 Assembly Structured Macros== There is a long history of IBM Assembler 370 Structured Macros. An early very well known version is found in JES328X product. Now there as part of SPM (Structured Programming Macros) concept. A recent version is HLASM Toolkit Features User's Guide (GC26-8710-10) http://publibz.boulder.ibm.com/epubs/pdf/asmtug21.pdf . You will found :
IF ... THEN ELSE ENDIF DO WHILE=(...) ENDDO DO UNTIL=(...) ENDDO
The classic macro REGEQU for refrerencing the registers is found in all good MACLIBs.
PROLOG and EPILOG are not part of this set my own version is:
MACRO &N PROLOG &N CSECT USING &N,13 @SAVEAR B @STM-@SAVEAR(15) DC 17F'0' DC CL8'&N' @STM STM 14,12,12(13) ST 13,4(15) ST 15,8(13) LR 13,15 MEND
MACRO &N EPILOG &N CNOP 0,4 L 13,4(0,13) LM 14,12,12(13) XR 15,15 BR 14 MEND
- HLASM Programmer's Guide (SC26-4941-06) http://publibz.boulder.ibm.com/epubs/pdf/asmp1021.pdf
- HLASM Language Reference (SC26-4940-06) http://publibz.boulder.ibm.com/epubs/pdf/asmr1021.pdf
- HLASM Toolkit Features User's Guide (GC26-8710-10) http://publibz.boulder.ibm.com/epubs/pdf/asmtug21.pdf