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ASSEMBLY & COMPILE TOOLS/PLM VAX COMPILER/plmudi/shifts.mar

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+        .TITLE  SHIFTS.  PLM RUNTIME LIBRARY: ROL, ET AL.
+;-----------------------------------------------------------------------
+;
+;               D I S C L A I M E R   N O T I C E
+;               -------------------   -----------
+;
+;  This document and/or portions of the material and data furnished
+;  herewith, was developed under sponsorship of the U. S. Government.
+;  Neither the U.S. nor the U.S.D.O.E., nor the Leland Stanford Junior
+;  University, nor their employees, nor their respective contractors,
+;  subcontractors, or their employees, makes any warranty, express or
+;  implied, or assumes any liability or responsibility for accuracy,
+;  completeness or usefulness of any information, apparatus, product
+;  or process disclosed, or represents that its use will not infringe
+;  privately-owned rights.  Mention of any product, its manufacturer,
+;  or suppliers shall not, nor is it intended to, imply approval, dis-
+;  approval, or fitness for any particular use.  The U. S. and the
+;  University at all times retain the right to use and disseminate same
+;  for any purpose whatsoever.  Such distribution shall be made by the
+;  National Energy Software Center at the Argonne National Laboratory
+;  and only subject to the distributee furnishing satisfactory proof
+;  that he has a valid license from the Intel Corporation in effect.
+;
+;-----------------------------------------------------------------------
+        .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