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psblas3/base/serial/f77/zswmm.f

189 lines
5.9 KiB
FortranFixed

C SUBROUTINE ZSWMM(TRANS,M,N,K,ALPHA,FIDA,DESCRA,A,IA1,IA2,
C INFOA,B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
C Purpose
C =======
C
C Computing C <-- ALPHA A B + BETA C or
C C <-- ALPHA At B + BETA C or
C C <-- ALPHA Atc B + BETA C
C Called by ZCSMM
C Actual computing performed by sparse Toolkit kernels.
C This routine selects the proper kernel for each
C data structure.
C
C Parameters
C ==========
C
C TRANS - CHARACTER*1
C On entry TRANS specifies if the routine operates with matrix A
C or with the transpose of A as follows:
C TRANS = 'N' -> use matrix A
C TRANS = 'T' -> use A' (transpose of matrix A)
C TRANS = 'C' -> use conjugate transpose of A
C Unchanged on exit.
C
C N.B.: M, N for C matrix
C M, K for A matrix
C K, N for B matrix
C
C M - INTEGER
C On entry: number of rows of matrix A (A') and
C number of rows of matrix C
C Unchanged on exit.
C
C N - INTEGER
C On entry: number of columns of matrix B
C and number of columns of matrix C.
C Unchanged on exit.
C
C K - INTEGER
C On entry: number of columns of matrix A (A') and
C number of rows of matrix B
C Unchanged on exit.
C
C ALPHA - COMPLEX*16
C On entry: multiplicative constant.
C Unchanged on exit.
C
C FIDA - CHARACTER*5
C On entry FIDA defines the format of the input sparse matrix.
C Unchanged on exit.
C
C DESCRA - CHARACTER*1 array of DIMENSION (9)
C On entry DESCRA describes the characteristics of the input
C sparse matrix.
C Unchanged on exit.
C
C A - COMPLEX*16 array of DIMENSION (*)
C On entry A specifies the values of the input sparse
C matrix.
C Unchanged on exit.
C
C IA1 - INTEGER array of dimension (*)
C On entry IA1 holds integer information on input sparse
C matrix. Actual information will depend on data format used.
C Unchanged on exit.
C
C IA2 - INTEGER array of dimension (*)
C On entry IA2 holds integer information on input sparse
C matrix. Actual information will depend on data format used.
C Unchanged on exit.
C
C INFOA - INTEGER array of length 10.
C On entry can hold auxiliary information on input matrices
C formats or environment of subsequent calls.
C Might be changed on exit.
C
C B - COMPLEX*16 matrix of dimension (LDB,*)
C On entry: dense matrix.
C Unchanged on exit.
C
C LDB - INTEGER
C On entry: leading dimension of B
C Unchanged on exit.
C
C BETA - COMPLEX*16
C On entry: multiplicative constant.
C Unchanged on exit.
C
C C - COMPLEX*16 matrix of dimension (LDC,*)
C On entry: dense matrix.
C On exit is updated with the matrix-matrix product.
C
C LDC - INTEGER
C On entry: leading dimension of C
C Unchanged on exit.
C
C WORK - COMPLEX*16 array of dimension (LWORK)
C On entry: work area.
C On exit INT(WORK(1)) contains the minimum value
C for LWORK satisfying ZSWMM memory requirements.
C
C LWORK - INTEGER
C On entry LWORK specifies the dimension of WORK
C Unchanged on exit.
C
C IERROR - INTEGER
C On exit IERROR contains the value of error flag as follows:
C IERROR = 0 no error
C IERROR > 0 warning
C IERROR < 0 fatal error
C
C Note
C ====
C All checks on argument are performed in the calling routine.
C
C
SUBROUTINE ZSWMM(TRANS,M,N,K,ALPHA,FIDA,DESCRA,A,IA1,IA2,
& INFOA,B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
C .. Scalar Arguments ..
INTEGER M,N,K,LDB,LDC,LWORK,IERROR
CHARACTER TRANS
COMPLEX*16 ALPHA,BETA
C .. Array Arguments ..
INTEGER IA1(*),IA2(*),INFOA(*)
CHARACTER DESCRA*11, FIDA*5
COMPLEX*16 A(*),B(LDB,*),C(LDC,*),WORK(*)
C .. Local Array ..
INTEGER INT_VAL(5), ERR_ACT
COMPLEX*16 Z_VAL(5)
CHARACTER*30 NAME, STRINGS(2)
C .. External Subroutines ..
EXTERNAL ZCSRMM
C + ZJADMM
C .. Executable Statements ..
C
C Switching on FIDA: proper sparse BLAS routine is selected
C according to data structure
C
NAME = 'ZSWMM\0'
IERROR = 0
CALL FCPSB_ERRACTIONSAVE(ERR_ACT)
IF (FIDA(1:3).EQ.'CSR') THEN
C
C A, IA1, IA2 ---> AR, JA, IA
C VAL, INDX, PNTR
C INFOA(*) not used
CALL ZCSRMM(TRANS,M,N,K,ALPHA,DESCRA,A,IA1,
& IA2,B,LDB,BETA,C,LDC,WORK,LWORK)
C
C JAD format not jet implemented
C
ELSE IF (FIDA(1:3).EQ.'COO') THEN
C
C INFOA(*) not used
C
CALL ZCOOMM(TRANS,M,N,K,ALPHA,DESCRA,A,IA1,
+ IA2,INFOA,B,LDB,BETA,C,LDC,WORK)
ELSE IF ((FIDA(1:3).EQ.'JAD').AND.(.FALSE.)) THEN
C
C INFOA(*) not used
C
C CALL ZJADMM(TRANS,M,N,K,ALPHA,DESCRA,A,IA1,
C & IA2,B,LDB,BETA,C,LDC,WORK)
ELSE
C
C This data structure not yet considered
C
IERROR = 3010
STRINGS(1) = FIDA(1:4)
CALL FCPSB_ERRPUSH(IERROR,NAME,INT_VAL)
GOTO 9999
END IF
CALL FCPSB_ERRACTIONRESTORE(ERR_ACT)
RETURN
9999 CONTINUE
CALL FCPSB_ERRACTIONRESTORE(ERR_ACT)
IF ( ERR_ACT .NE. 0 ) THEN
CALL FCPSB_SERROR()
RETURN
ENDIF
END