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.
176 lines
5.8 KiB
Fortran
176 lines
5.8 KiB
Fortran
C
|
|
C Parallel Sparse BLAS version 2.2
|
|
C (C) Copyright 2006/2007/2008
|
|
C Salvatore Filippone University of Rome Tor Vergata
|
|
C Alfredo Buttari University of Rome Tor Vergata
|
|
C
|
|
C Redistribution and use in source and binary forms, with or without
|
|
C modification, are permitted provided that the following conditions
|
|
C are met:
|
|
C 1. Redistributions of source code must retain the above copyright
|
|
C notice, this list of conditions and the following disclaimer.
|
|
C 2. Redistributions in binary form must reproduce the above copyright
|
|
C notice, this list of conditions, and the following disclaimer in the
|
|
C documentation and/or other materials provided with the distribution.
|
|
C 3. The name of the PSBLAS group or the names of its contributors may
|
|
C not be used to endorse or promote products derived from this
|
|
C software without specific written permission.
|
|
C
|
|
C THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
C ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
C TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
C PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
|
|
C BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
C CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
C SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
C INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
C CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
C ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
C POSSIBILITY OF SUCH DAMAGE.
|
|
C
|
|
SUBROUTINE ZSRSV (UPLO,TRANS,DIAG,N,AS,JA,IA,B,X)
|
|
use psb_const_mod
|
|
complex(psb_dpk_) ZERO
|
|
PARAMETER (ZERO = (0.0D0, 0.0D0))
|
|
INTEGER N
|
|
CHARACTER DIAG, TRANS, UPLO
|
|
complex(psb_dpk_) AS(*), B(*), X(*)
|
|
INTEGER IA(*), JA(*)
|
|
complex(psb_dpk_) ACC
|
|
INTEGER I, J, K
|
|
LOGICAL LOW, TRA, COTRA, UNI
|
|
UNI = (DIAG.EQ.'U')
|
|
TRA = (TRANS.EQ.'T')
|
|
COTRA = (TRANS.EQ.'C')
|
|
LOW = (UPLO.EQ.'L')
|
|
IF ((.NOT.TRA).AND.(.NOT.COTRA)) THEN
|
|
IF (LOW) THEN
|
|
IF (.NOT.UNI) THEN
|
|
DO 40 I = 1, N
|
|
ACC = ZERO
|
|
DO 20 J = IA(I), IA(I+1) - 2
|
|
ACC = ACC + AS(J)*X(JA(J))
|
|
20 CONTINUE
|
|
X(I) = (B(I)-ACC)/AS(IA(I+1)-1)
|
|
40 CONTINUE
|
|
ELSE IF (UNI) THEN
|
|
DO 80 I = 1, N
|
|
ACC = ZERO
|
|
DO 60 J = IA(I), IA(I+1) - 1
|
|
ACC = ACC + AS(J)*X(JA(J))
|
|
60 CONTINUE
|
|
X(I) = B(I) - ACC
|
|
80 CONTINUE
|
|
END IF
|
|
ELSE IF (.NOT.LOW) THEN
|
|
IF (.NOT.UNI) THEN
|
|
DO 120 I = N, 1, -1
|
|
ACC = ZERO
|
|
DO 100 J = IA(I) + 1, IA(I+1) - 1
|
|
ACC = ACC + AS(J)*X(JA(J))
|
|
100 CONTINUE
|
|
X(I) = (B(I)-ACC)/AS(IA(I))
|
|
120 CONTINUE
|
|
ELSE IF (UNI) THEN
|
|
DO 160 I = N, 1, -1
|
|
ACC = ZERO
|
|
DO 140 J = IA(I), IA(I+1) - 1
|
|
ACC = ACC + AS(J)*X(JA(J))
|
|
140 CONTINUE
|
|
X(I) = B(I) - ACC
|
|
160 CONTINUE
|
|
END IF
|
|
END IF
|
|
ELSE IF (TRA) THEN
|
|
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
|
|
ELSE IF (COTRA) THEN
|
|
DO 580 I = 1, N
|
|
X(I) = B(I)
|
|
580 CONTINUE
|
|
IF (LOW) THEN
|
|
IF (.NOT.UNI) THEN
|
|
DO 620 I = N, 1, -1
|
|
X(I) = X(I)/CONJG(AS(IA(I+1)-1))
|
|
ACC = X(I)
|
|
DO 600 J = IA(I), IA(I+1) - 2
|
|
K = JA(J)
|
|
X(K) = X(K) - CONJG(AS(J))*ACC
|
|
600 CONTINUE
|
|
620 CONTINUE
|
|
ELSE IF (UNI) THEN
|
|
DO 660 I = N, 1, -1
|
|
ACC = X(I)
|
|
DO 640 J = IA(I), IA(I+1) - 1
|
|
K = JA(J)
|
|
X(K) = X(K) - CONJG(AS(J))*ACC
|
|
640 CONTINUE
|
|
660 CONTINUE
|
|
END IF
|
|
ELSE IF (.NOT.LOW) THEN
|
|
IF (.NOT.UNI) THEN
|
|
DO 700 I = 1, N
|
|
X(I) = X(I)/CONJG(AS(IA(I)))
|
|
ACC = X(I)
|
|
DO 680 J = IA(I) + 1, IA(I+1) - 1
|
|
K = JA(J)
|
|
X(K) = X(K) - CONJG(AS(J))*ACC
|
|
680 CONTINUE
|
|
700 CONTINUE
|
|
ELSE IF (UNI) THEN
|
|
DO 740 I = 1, N
|
|
ACC = X(I)
|
|
DO 720 J = IA(I), IA(I+1) - 1
|
|
K = JA(J)
|
|
X(K) = X(K) - CONJG(AS(J))*ACC
|
|
720 CONTINUE
|
|
740 CONTINUE
|
|
END IF
|
|
END IF
|
|
END IF
|
|
RETURN
|
|
END
|
|
|
|
|
|
|