1 !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
5 ! Authors: Paul N. Swarztrauber and Richard A. Valent
7 ! $Id: msntb1.f,v 1.2 2004/06/15 21:29:20 rodney Exp $
9 !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
11 SUBROUTINE MSNTB1(LOT,JUMP,N,INC,X,WSAVE,DSUM,XH,WORK,IER)
12 REAL X(INC,*) ,WSAVE(*) ,XH(LOT,*)
13 DOUBLE PRECISION DSUM(*)
17 102 SRT3S2 = SQRT(3.)/2.
19 XHOLD = SRT3S2*(X(M,1)+X(M,2))
20 X(M,2) = SRT3S2*(X(M,1)-X(M,2))
32 T2 = WSAVE(K)*(X(M,K)+X(M,KC))
38 IF (MODN .EQ. 0) GO TO 124
42 XH(M1,NS2+2) = 4.*X(M,NS2+1)
47 LNXH = LOT-1 + LOT*(NP1-1) + 1
48 LNSV = NP1 + INT(LOG(REAL(NP1))) + 4
51 CALL RFFTMF(LOT,1,NP1,LOT,XH,LNXH,WSAVE(NS2+1),LNSV,WORK, &
55 CALL XERFFT ('MSNTB1',-5)
59 IF(MOD(NP1,2) .NE. 0) GO TO 30
61 XH(M,NP1) = XH(M,NP1)+XH(M,NP1)
63 30 FNP1S4 = FLOAT(NP1)/4.
67 X(M,1) = FNP1S4*XH(M1,1)
74 X(M,I-1) = FNP1S4*XH(M1,I)
75 DSUM(M1) = DSUM(M1)+FNP1S4*XH(M1,I-1)
79 IF (MODN .NE. 0) GO TO 200
83 X(M,N) = FNP1S4*XH(M1,N+1)