Files
Digital-Research-Source-Code/MPM OPERATING SYSTEMS/MPM II/MPM II SOURCE/CONTROL/DOWHILE.LIB
Sepp J Morris 31738079c4 Upload
Digital Research
2020-11-06 18:50:37 +01:00

41 lines
896 B
Plaintext
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

; MACRO LIBRARY FOR "DOWHILE" CONSTRUCT
;
GENDTST MACRO TST,X,Y,NUM
;; GENERATE A "DOWHILE" TEST
TST X,Y,,ENDD&NUM
ENDM
;
GENDLAB MACRO LAB,NUM
;; PRODUCE THE LABEL LAB & NUM
;; FOR DOWHILE ENTRY OR EXIT
LAB&NUM:
ENDM
;
GENDJMP MACRO NUM
;; GENERATE JUMP TO DOWHILE TEST
JMP DTEST&NUM
ENDM
;
DOWHILE MACRO XV,REL,YV
;; INITIALIZE COUNTER
DOCNT SET 0 ;NUMBER OF DOWHILES
;;
DOWHILE MACRO X,R,Y
;; GENERATE THE DOWHILE ENTRY
GENDLAB DTEST,%DOCNT
;; GENERATE THE CONDITIONAL TEST
GENDTST R,X,Y,%DOCNT
DOLEV SET DOCNT ;;NEXT ENDD TO GENERATE
DOCNT SET DOCNT+1
ENDM
DOWHILE XV,REL,YV
ENDM
;
ENDDO MACRO
;; GENERATE THE JUMP TO THE TEST
GENDJMP %DOLEV
;; GENERATE THE END OF A DOWHILE
GENDLAB ENDD,%DOLEV
DOLEV SET DOLEV-1
ENDM