You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
187 lines
5.7 KiB
FortranFixed
187 lines
5.7 KiB
FortranFixed
19 years ago
|
C
|
||
|
|
C Assumption: the triangular matrix has the diagonal element in the
|
||
|
|
C "right" place, i.e. the last in its row for Lower and the first
|
||
|
|
C for Upper.
|
||
|
|
C
|
||
|
|
SUBROUTINE ZCOOSV (UPLO,TRANS,DIAG,N,AS,IA,JA,INFOA,B,X,IERROR)
|
||
|
|
COMPLEX*16 ZERO
|
||
|
|
PARAMETER (ZERO=(0.0D0,0.0D0))
|
||
|
|
LOGICAL DEBUG
|
||
|
|
PARAMETER (DEBUG=.FALSE.)
|
||
|
|
INTEGER N,IERROR
|
||
|
|
CHARACTER DIAG, TRANS, UPLO
|
||
|
|
COMPLEX*16 AS(*), B(*), X(*)
|
||
|
|
INTEGER IA(*), JA(*),INFOA(*)
|
||
|
|
COMPLEX*16 ACC
|
||
|
|
INTEGER I, J, K, NNZ, II, JJ
|
||
|
|
LOGICAL LOW, TRA, UNI
|
||
|
|
if (debug) write(*,*) 'ZCOOSV ',n
|
||
|
|
if (debug) write(*,*) 'ZCOOSV ',n,nnz,diag,trans,uplo
|
||
|
|
UNI = (DIAG.EQ.'U')
|
||
|
|
TRA = (TRANS.EQ.'T')
|
||
|
|
LOW = (UPLO.EQ.'L')
|
||
|
|
NNZ = INFOA(1)
|
||
|
|
if (debug) write(*,*) 'ZCOOSV ',n,nnz,uni,tra,low,ia(1),ja(1)
|
||
|
|
IERROR = 0
|
||
|
|
if (debug) write(*,*) 'ZCOOSV ierror ',ierror
|
||
|
|
IF ( .NOT. TRA) THEN
|
||
|
|
if (debug) write(*,*) 'ZCOOSV NOT TRA'
|
||
|
|
IF (LOW) THEN
|
||
|
|
if (debug) write(*,*) 'ZCOOSV LOW'
|
||
|
|
IF ( .NOT. UNI) THEN
|
||
|
|
if (debug) write(*,*) 'ZCOOSV NOT UNI'
|
||
|
|
I = 1
|
||
|
|
J = I
|
||
|
|
DO WHILE (I.LE.NNZ)
|
||
|
|
DO WHILE ((J.LE.NNZ).AND.(IA(J).EQ.IA(I)))
|
||
|
|
J = J+1
|
||
|
|
ENDDO
|
||
|
|
ACC = ZERO
|
||
|
|
IR = IA(I)
|
||
|
|
DO K = I, J-2
|
||
|
|
JC = JA(K)
|
||
|
|
ACC = ACC + AS(K)*X(JC)
|
||
|
|
ENDDO
|
||
|
|
X(IR) = (B(IR)-ACC)/AS(J-1)
|
||
|
|
I = J
|
||
|
|
ENDDO
|
||
|
|
|
||
|
|
ELSE IF (UNI) THEN
|
||
|
|
C
|
||
|
|
C Bug warning: if UNI, some rows might be empty
|
||
|
|
C
|
||
|
|
I = 1
|
||
|
|
if (debug) write(*,*) 'ZCOOSV UNILOW ',
|
||
|
|
+ i,n,nnz,uni,tra,low
|
||
|
|
DO II = 1, N
|
||
|
|
if (debug) write(*,*) 'Loop1 COOSV',i,j,ii,x(ii),b(ii)
|
||
|
|
DO WHILE ((I.LE.NNZ).AND.(IA(I).LT.II))
|
||
|
|
I = I + 1
|
||
|
|
c$$$ if (debug) write(*,*) 'Loop2 COOSV',i,ia(i),ii
|
||
|
|
ENDDO
|
||
|
|
ACC = ZERO
|
||
|
|
IF ((I.LE.NNZ).AND.(IA(I).EQ.II)) THEN
|
||
|
|
J = I + 1
|
||
|
|
DO WHILE ((J.LE.NNZ).AND.(IA(J).EQ.IA(I)))
|
||
|
|
J = J+1
|
||
|
|
ENDDO
|
||
|
|
DO K = I, J-1
|
||
|
|
JC = JA(K)
|
||
|
|
ACC = ACC + AS(K)*X(JC)
|
||
|
|
ENDDO
|
||
|
|
ELSE
|
||
|
|
J = I
|
||
|
|
ENDIF
|
||
|
|
X(II) = (B(II)-ACC)
|
||
|
|
if (debug) write(*,*) 'Loop COOSV',i,j,ii,x(ii),b(ii)
|
||
|
|
I = J
|
||
|
|
ENDDO
|
||
|
|
|
||
|
|
END IF
|
||
|
|
|
||
|
|
ELSE IF ( .NOT. LOW) THEN
|
||
|
|
if (debug) write(*,*) 'ZCOOSV NOT LOW'
|
||
|
|
IF ( .NOT. UNI) THEN
|
||
|
|
if (debug) write(*,*) 'ZCOOSV NOT UNI'
|
||
|
|
I = NNZ
|
||
|
|
J = NNZ
|
||
|
|
DO WHILE (I.GT.0)
|
||
|
|
DO WHILE ((J.GT.0).AND.(IA(J).EQ.IA(I)))
|
||
|
|
J = J-1
|
||
|
|
ENDDO
|
||
|
|
ACC = ZERO
|
||
|
|
IR = IA(I)
|
||
|
|
DO K = I, J+2,-1
|
||
|
|
JC = JA(K)
|
||
|
|
ACC = ACC + AS(K)*X(JC)
|
||
|
|
ENDDO
|
||
|
|
X(IR) = (B(IR)-ACC)/AS(J+1)
|
||
|
|
I = J
|
||
|
|
ENDDO
|
||
|
|
|
||
|
|
ELSE IF (UNI) THEN
|
||
|
|
if (debug) write(*,*) 'ZCOOSV UNI'
|
||
|
|
I = NNZ
|
||
|
|
DO II = N,1,-1
|
||
|
|
DO WHILE ((I.GT.0).AND.(IA(I).GT.II))
|
||
|
|
I = I -1
|
||
|
|
ENDDO
|
||
|
|
ACC = ZERO
|
||
|
|
IF ((I.GT.0).AND.(IA(I).EQ.II)) THEN
|
||
|
|
J = I - 1
|
||
|
|
DO WHILE ((J.GT.0).AND.(IA(J).EQ.IA(I)))
|
||
|
|
J = J-1
|
||
|
|
ENDDO
|
||
|
|
DO K = I, J+1, -1
|
||
|
|
JC = JA(K)
|
||
|
|
ACC = ACC + AS(K)*X(JC)
|
||
|
|
ENDDO
|
||
|
|
ELSE
|
||
|
|
J = I
|
||
|
|
ENDIF
|
||
|
|
X(II) = (B(II)-ACC)
|
||
|
|
if (debug) write(*,*) 'Loop COOSV',i,j,ii,x(ii),b(ii)
|
||
|
|
I = J
|
||
|
|
ENDDO
|
||
|
|
|
||
|
|
END IF
|
||
|
|
|
||
|
|
END IF
|
||
|
|
|
||
|
|
ELSE IF (TRA) THEN
|
||
|
|
IERROR = 3010
|
||
|
|
return
|
||
|
|
CCCCCCCCCCCCCCCC
|
||
|
|
C
|
||
|
|
C TBF
|
||
|
|
C
|
||
|
|
CCCCCCCCCCCCCCCC
|
||
|
|
DO 180 I = 1, N
|
||
|
|
X(I) = B(I)
|
||
|
|
180 CONTINUE
|
||
|
|
IF (LOW) THEN
|
||
|
|
IF ( .NOT. UNI) THEN
|
||
|
|
DO 220 I = N, 1, -1
|
||
|
|
X(I) = X(I)/AS(IA(I+1)-1)
|
||
|
|
ACC = X(I)
|
||
|
|
DO 200 J = IA(I), IA(I+1) - 2
|
||
|
|
K = JA(J)
|
||
|
|
X(K) = X(K) - AS(J)*ACC
|
||
|
|
200 CONTINUE
|
||
|
|
220 CONTINUE
|
||
|
|
ELSE IF (UNI) THEN
|
||
|
|
DO 260 I = N, 1, -1
|
||
|
|
ACC = X(I)
|
||
|
|
DO 240 J = IA(I), IA(I+1) - 1
|
||
|
|
K = JA(J)
|
||
|
|
X(K) = X(K) - AS(J)*ACC
|
||
|
|
240 CONTINUE
|
||
|
|
260 CONTINUE
|
||
|
|
END IF
|
||
|
|
ELSE IF ( .NOT. LOW) THEN
|
||
|
|
IF ( .NOT. UNI) THEN
|
||
|
|
DO 300 I = 1, N
|
||
|
|
X(I) = X(I)/AS(IA(I))
|
||
|
|
ACC = X(I)
|
||
|
|
DO 280 J = IA(I) + 1, IA(I+1) - 1
|
||
|
|
K = JA(J)
|
||
|
|
X(K) = X(K) - AS(J)*ACC
|
||
|
|
280 CONTINUE
|
||
|
|
300 CONTINUE
|
||
|
|
ELSE IF (UNI) THEN
|
||
|
|
DO 340 I = 1, N
|
||
|
|
ACC = X(I)
|
||
|
|
DO 320 J = IA(I), IA(I+1) - 1
|
||
|
|
K = JA(J)
|
||
|
|
X(K) = X(K) - AS(J)*ACC
|
||
|
|
320 CONTINUE
|
||
|
|
340 CONTINUE
|
||
|
|
END IF
|
||
|
|
END IF
|
||
|
|
END IF
|
||
|
|
RETURN
|
||
|
|
END
|
||
|
|
|
||
|
|
|
||
|
|
|