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MPM OPERATING SYSTEMS/MPM II/MPM II SOURCE 2/Control_2/ncompare.lib

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+;	MACRO LIBRARY FOR 8-BIT COMPARISON OPERATION
+;
+TEST?	MACRO	X,Y
+;;	UTILTITY MACRO TO GENERATE CONDITION CODES
+	IF	NOT NUL X	;;THEN LOAD X
+	LDA	X	;;X ASSUMED TO BE IN MEMORY
+	ENDIF
+	IRPC	?Y,Y	;;Y MAY BE CONSTANT OPERAND
+TDIG?	SET	'&?Y'-'0'	;;FIRST CHAR DIGIT?
+	EXITM		;;STOP IRPC AFTER FIRST CHAR
+	ENDM
+	IF	TDIG? <= 9	;;Y NUMERIC?
+	SUI	Y	;;YES, SO SUB IMMEDIATE
+	ELSE
+	LXI	H,Y	;;Y NOT NUMERIC
+	SUB	M	;;SO SUB FROM MEMORY
+	ENDM
+;
+LSS	MACRO	X,Y,TL,FL
+;;	X LSS THAN Y TEST,
+;;	IF TL IS PRESENT, ASSUME TRUE TEST
+;;	IF TL IS ABSENT, THEN INVERT TEST
+	IF	NUL TL
+	GEQ	X,Y,FL
+	ELSE
+	TEST?	X,Y	;;SET CONDITION CODES
+	JC	TL
+	ENDM
+;
+LEQ	MACRO	X,Y,TL,FL
+;;	X LESS THAN OR EQUAL TO Y TEST
+	IF	NUL TL
+	GEQ	X,Y,FL
+	ELSE
+	LSS	X,Y,TL
+	JZ	TL
+	ENDM
+;
+EQL	MACRO	X,Y,TL,FL
+;;	X EQUAL TO Y TEST
+	IF	NUL TL
+	NEQ	X,Y,FL
+	ELSE
+	TEST?	X,Y
+	JZ	TL
+	ENDM
+;
+NEQ	MACRO	X,Y,TL,FL
+;;	X NOT EQUAL TO Y TEST
+	IF	NUL TL
+	EQL	X,Y,FL
+	ELSE
+	TEST?	X,Y
+	JNZ	TL
+	ENDM
+;
+GEQ	MACRO	X,Y,TL,FL
+;;	X GREATER THAN OR EQUAL TO Y TEST
+	IF	NUL TL
+	LSS	X,Y,FL
+	ELSE
+	TEST?	X,Y
+	JNC	TL
+	ENDM
+;
+GTR	MACRO	X,Y,TL,FL
+;;	X GREATER THAN Y TEST
+	IF	NUL TL
+	LEQ	X,Y,FL
+	ELSE
+	LOCAL	GFL	;;FALSE LABEL
+	TEST?	X,Y
+	JC	GFL
+	DCR	A
+	JNC	TL
+GFL:	ENDM
+