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decus_20tap1_198111
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decus/20-0013/cot.mac
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TITLE COT ANGENT FUNCTION
SUBTTL V.001 R.S.TOMLINSON 18 FEB 69
ENTRY COT
INTERN COT
EXTERN SIN,COS
; THIS PROGRAM COMPUTES COT(X) BY THE SIMPLE EXPEDIENT OF
; COT(X) = COS(X)/SIN(X)
; Modified to PUSHJ/POPJ convention 11 Oct 1980
; by Paul T. Robinson, Wesleyan Univ. for DECUS conversion to DEC-20
;COT: Z
; MOVE 0,@0(16)
; MOVEM 0,COTT#
; JSA 16,SIN
; JUMP COTT
; MOVEM 0,COTT2#
; JSA 16,COS
; JUMP COTT
; FDVR 0,COTT2
; JRA 16,1(16)
; Use the arg block that FORTRAN gives to call sin and cos routines
cot: pushj 17,sin
movem 0,cott#
pushj 17,cos
fdvr 0,cott
popj 17,
END