.TITLE	PROD  COMPONENT PRODUCT OF TWO VECTORS 
	.IDENT  /1.0/					;  08/15/79
;+							     ++EXTSPC>>
;.NAME  PROD
;.INDEX PRODD
;.TITLE  SUBROUTINE PROD 
;
;		CALL PROD  (C,A,B,N)
;
;		CALL PRODD (C,A,B,N)
;
; VERSION:  VECTOR / MATRIX ROUTINES     SAM MILLER     REL 1.0  
;
; FUNCTION:
;
;	COMPONENT PRODUCT OF TWO VECTORS 
;
;	C(I)=A(I)*B(I)  FOR I<=I<=N
;
; LANGUAGE:  MACRO-11
;
;
; ARGUMENTS:
;
;	C   = OUTPUT VECTOR
;	A,B = INPUT VECTOR
;	N   = VECTOR DIMENSION
;
;
; COMMONS:
;
;	(NONE)
;
;
; GENERAL DESCRIPTION:
;
;	ALL REAL ARGUMENTS EXCEPT INTEGER N.
;
;       SINGLE PRECISION -      PROD    FOR N-VECTORS
;
;       DOUBLE PRECISION -      PRODD   FOR N-VECTORS
;
;
;
; PERIPHERAL INPUT/OUTPUT:
;
;	(NONE)
;
;
; LOGICAL UNIT USAGE:
;
;	(NONE)
;
;
; EXTERNAL ROUTINES CALLED:
;
;	NAM$
;	$BOMB
;
;-							     --EXTSPC>>
;
; WRITTEN BY:
;
;       DENIS MAHONY AND SAM MILLER     08/15/79
;
;
; MODIFIED BY:
;
;	**********	**DATE**
;		**DETAIL**
;
;-							--EXTSPC>>
	.PAGE
	.GLOBL	PROD
	.ENABL	LSB
F0=R0				;DEFINE FLOATING REGISTER 0
PROD:
	CMP	#4,(R5)+	;CHECK NUMBER OF ARGUMENTS
	BNE	BOMB		;BOMB IF # OF ARGS. IS INCORRECT
      	MOV	(R5)+,R3	;R3=ADDRESS OF C
	MOV	(R5)+,R4	;R4=ADDRESS OF A
	MOV	(R5)+,R1	;R1=ADDRESS OF B
	MOVB	@(R5),R2	;R2=N  (LOOP COUNT)
	SETF
10$:	LDF	(R4)+,F0	;GET A(I)
	MULF	(R1)+,F0	;F0=A(I)*B(I)
	STF	F0,(R3)+	;STORE F0 INTO C(I)
	SOB	R2,10$		;DONE?
	RTS	PC		;DONE.  SO RETURN.
BOMB:	MOV	#14400,-(SP)	;MOVE 2ND HALF OF NAME TO STACK
	MOV	#63337,R4	;MOVE 1ST HALF OF NAME TO R4
	JSR	R4,NAM$		;SUBR TO PUT NAME IN WALKBACK
	JMP	$BOMB		;ABORT, $BOMB DOES NOT EXIST
	.END