.TITLE  SHIFTS.  PLM RUNTIME LIBRARY: ROL, ET AL.
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;  This document and/or portions of the material and data furnished
;  herewith, was developed under sponsorship of the U. S. Government.
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        .PSECT  PLMRUN_CODE,RD,NOWRT,EXE,GBL,CON,LONG
 
;   
;   B = ROL(PATTERN,COUNT)
;
 
PATTERN=4			; BYTE OR WORD.
COUNT=8				; BYTE
 
	.ENTRY	ROL.,^M<>
	MOVZBL	PATTERN(AP),R0
	MULL2	#^X01010101,R0	; REPLICATE BYTE 4 TIMES.
	ROTL	COUNT(AP),R0,R0
	RET
 
;
;   B = ROR(PATTERN,COUNT)
;
 
	.ENTRY	ROR.,^M<>
	MOVZBL	PATTERN(AP),R0
        MULL2   #^X01010101,R0  ; REPLICATE BYTE 4 TIMES.
	MNEGB	COUNT(AP),R1
	ROTL	R1,R0,R0
	RET
 
;
;   W = SHL(PATTERN,COUNT)
;
 
	.ENTRY	SHL.,^M<>
	MOVZWL	PATTERN(AP),R0
	ASHL	COUNT(AP),R0,R0
	RET
 
;
;   W = SHR(PATTERN,COUNT)
;
 
	.ENTRY	SHR.,^M<>
	MOVZWL	PATTERN(AP),R0
	MNEGB	COUNT(AP),R1
	ASHL	R1,R0,R0
	RET
 
;
;   I = SAL(PATTERN,COUNT)
;
 
	.ENTRY	SAL.,^M<>
	CVTWL	PATTERN(AP),R0
	ASHL	COUNT(AP),R0,R0
	RET
 
;
;   I = SAR(PATTERN,COUNT)
;
 
	.ENTRY	SAR.,^M<>
	CVTWL	PATTERN(AP),R0
	MNEGB	COUNT(AP),R1
	ASHL	R1,R0,R0
	RET
	.END