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ctrmmf.f

ctrmmf.f 14.23 KB

SUBROUTINE CTRMMF ( SIDE, UPLO, TRANSA, DIAG, M, N, ALPHA, A, LDA,
 $ B, LDB )
* .. Scalar Arguments ..
 CHARACTER*1 SIDE, UPLO, TRANSA, DIAG
 INTEGER M, N, LDA, LDB
 COMPLEX ALPHA
* .. Array Arguments ..
 COMPLEX A( LDA, * ), B( LDB, * )
* ..
*
* Purpose
* =======
*
* CTRMM performs one of the matrix-matrix operations
*
* B := alpha*op( A )*B, or B := alpha*B*op( A )
*
* where alpha is a scalar, B is an m by n matrix, A is a unit, or
* non-unit, upper or lower triangular matrix and op( A ) is one of
*
* op( A ) = A or op( A ) = A' or op( A ) = conjg( A' ).
*
* Parameters
* ==========
*
* SIDE - CHARACTER*1.
* On entry, SIDE specifies whether op( A ) multiplies B from
* the left or right as follows:
*
* SIDE = 'L' or 'l' B := alpha*op( A )*B.
*
* SIDE = 'R' or 'r' B := alpha*B*op( A ).
*
* Unchanged on exit.
*
* UPLO - CHARACTER*1.
* On entry, UPLO specifies whether the matrix A is an upper or
* lower triangular matrix as follows:
*
* UPLO = 'U' or 'u' A is an upper triangular matrix.
*
* UPLO = 'L' or 'l' A is a lower triangular matrix.
*
* Unchanged on exit.
*
* TRANSA - CHARACTER*1.
* On entry, TRANSA specifies the form of op( A ) to be used in
* the matrix multiplication as follows:
*
* TRANSA = 'N' or 'n' op( A ) = A.
*
* TRANSA = 'T' or 't' op( A ) = A'.
*
* TRANSA = 'C' or 'c' op( A ) = conjg( A' ).
*
* Unchanged on exit.
*
* DIAG - CHARACTER*1.
* On entry, DIAG specifies whether or not A is unit triangular
* as follows:
*
* DIAG = 'U' or 'u' A is assumed to be unit triangular.
*
* DIAG = 'N' or 'n' A is not assumed to be unit
* triangular.
*
* Unchanged on exit.
*
* M - INTEGER.
* On entry, M specifies the number of rows of B. M must be at
* least zero.
* Unchanged on exit.
*
* N - INTEGER.
* On entry, N specifies the number of columns of B. N must be
* at least zero.
* Unchanged on exit.
*
* ALPHA - COMPLEX .
* On entry, ALPHA specifies the scalar alpha. When alpha is
* zero then A is not referenced and B need not be set before
* entry.
* Unchanged on exit.
*
* A - COMPLEX array of DIMENSION ( LDA, k ), where k is m
* when SIDE = 'L' or 'l' and is n when SIDE = 'R' or 'r'.
* Before entry with UPLO = 'U' or 'u', the leading k by k
* upper triangular part of the array A must contain the upper
* triangular matrix and the strictly lower triangular part of
* A is not referenced.
* Before entry with UPLO = 'L' or 'l', the leading k by k
* lower triangular part of the array A must contain the lower
* triangular matrix and the strictly upper triangular part of
* A is not referenced.
* Note that when DIAG = 'U' or 'u', the diagonal elements of
* A are not referenced either, but are assumed to be unity.
* Unchanged on exit.
*
* LDA - INTEGER.
* On entry, LDA specifies the first dimension of A as declared
* in the calling (sub) program. When SIDE = 'L' or 'l' then
* LDA must be at least max( 1, m ), when SIDE = 'R' or 'r'
* then LDA must be at least max( 1, n ).
* Unchanged on exit.
*
* B - COMPLEX array of DIMENSION ( LDB, n ).
* Before entry, the leading m by n part of the array B must
* contain the matrix B, and on exit is overwritten by the
* transformed matrix.
*
* LDB - INTEGER.
* On entry, LDB specifies the first dimension of B as declared
* in the calling (sub) program. LDB must be at least
* max( 1, m ).
* Unchanged on exit.
*
*
* Level 3 Blas routine.
*
* -- Written on 8-February-1989.
* Jack Dongarra, Argonne National Laboratory.
* Iain Duff, AERE Harwell.
* Jeremy Du Croz, Numerical Algorithms Group Ltd.
* Sven Hammarling, Numerical Algorithms Group Ltd.
*
*
* .. External Functions ..
 LOGICAL LSAME
 EXTERNAL LSAME
* .. External Subroutines ..
 EXTERNAL XERBLA
* .. Intrinsic Functions ..
 INTRINSIC CONJG, MAX
* .. Local Scalars ..
 LOGICAL LSIDE, NOCONJ, NOUNIT, UPPER
 INTEGER I, INFO, J, K, NROWA
 COMPLEX TEMP
* .. Parameters ..
 COMPLEX ONE
 PARAMETER ( ONE = ( 1.0D+0, 0.0D+0 ) )
 COMPLEX ZERO
 PARAMETER ( ZERO = ( 0.0D+0, 0.0D+0 ) )
* ..
* .. Executable Statements ..
*
* Test the input parameters.
*
 LSIDE = LSAME( SIDE , 'L' )
 IF( LSIDE )THEN
 NROWA = M
 ELSE
 NROWA = N
 END IF
 NOCONJ = LSAME( TRANSA, 'N' ) .OR. LSAME( TRANSA, 'T' )
 NOUNIT = LSAME( DIAG , 'N' )
 UPPER = LSAME( UPLO , 'U' )
*
 INFO = 0
 IF( ( .NOT.LSIDE ).AND.
 $ ( .NOT.LSAME( SIDE , 'R' ) ) )THEN
 INFO = 1
 ELSE IF( ( .NOT.UPPER ).AND.
 $ ( .NOT.LSAME( UPLO , 'L' ) ) )THEN
 INFO = 2
 ELSE IF( ( .NOT.LSAME( TRANSA, 'N' ) ).AND.
 $ ( .NOT.LSAME( TRANSA, 'T' ) ).AND.
 $ ( .NOT.LSAME( TRANSA, 'R' ) ).AND.
 $ ( .NOT.LSAME( TRANSA, 'C' ) ) )THEN
 INFO = 3
 ELSE IF( ( .NOT.LSAME( DIAG , 'U' ) ).AND.
 $ ( .NOT.LSAME( DIAG , 'N' ) ) )THEN
 INFO = 4
 ELSE IF( M .LT.0 )THEN
 INFO = 5
 ELSE IF( N .LT.0 )THEN
 INFO = 6
 ELSE IF( LDA.LT.MAX( 1, NROWA ) )THEN
 INFO = 9
 ELSE IF( LDB.LT.MAX( 1, M ) )THEN
 INFO = 11
 END IF
 IF( INFO.NE.0 )THEN
 CALL XERBLA( 'CTRMM ', INFO )
 RETURN
 END IF
*
* Quick return if possible.
*
 IF( N.EQ.0 )
 $ RETURN
*
* And when alpha.eq.zero.
*
 IF( ALPHA.EQ.ZERO )THEN
 DO 20, J = 1, N
 DO 10, I = 1, M
 B( I, J ) = ZERO
 10 CONTINUE
 20 CONTINUE
 RETURN
 END IF
*
* Start the operations.
*
 IF( LSIDE )THEN
 IF( LSAME( TRANSA, 'N' ) .OR. LSAME( TRANSA, 'R' ))THEN
*
* Form B := alpha*A*B.
*
 IF( UPPER )THEN
 DO 50, J = 1, N
 DO 40, K = 1, M
 IF( B( K, J ).NE.ZERO )THEN
 TEMP = ALPHA*B( K, J )
 IF (NOCONJ) THEN
 DO 30, I = 1, K - 1
 B( I, J ) = B( I, J ) + TEMP*A( I, K )
 30 CONTINUE
 IF( NOUNIT )
 $ TEMP = TEMP*A( K, K )
 B( K, J ) = TEMP
 ELSE
 DO 35, I = 1, K - 1
 B( I, J ) = B( I, J ) + TEMP*CONJG(A( I, K ))
 35 CONTINUE
 IF( NOUNIT )
 $ TEMP = TEMP*CONJG(A( K, K ))
 B( K, J ) = TEMP
 ENDIF
 END IF
 40 CONTINUE
 50 CONTINUE
 ELSE
 DO 80, J = 1, N
 DO 70 K = M, 1, -1
 IF( B( K, J ).NE.ZERO )THEN
 TEMP = ALPHA*B( K, J )
 B( K, J ) = TEMP
 IF (NOCONJ) THEN
 IF( NOUNIT )
 $ B( K, J ) = B( K, J )*A( K, K )
 DO 60, I = K + 1, M
 B( I, J ) = B( I, J ) + TEMP*A( I, K )
 60 CONTINUE
 ELSE
 IF( NOUNIT )
 $ B( K, J ) = B( K, J )*CONJG(A( K, K ))
 DO 65, I = K + 1, M
 B( I, J ) = B( I, J ) + TEMP*CONJG(A( I, K ))
 65 CONTINUE
 ENDIF
 END IF
 70 CONTINUE
 80 CONTINUE
 END IF
 ELSE
*
* Form B := alpha*A'*B or B := alpha*conjg( A' )*B.
*
 IF( UPPER )THEN
 DO 120, J = 1, N
 DO 110, I = M, 1, -1
 TEMP = B( I, J )
 IF( NOCONJ )THEN
 IF( NOUNIT )
 $ TEMP = TEMP*A( I, I )
 DO 90, K = 1, I - 1
 TEMP = TEMP + A( K, I )*B( K, J )
 90 CONTINUE
 ELSE
 IF( NOUNIT )
 $ TEMP = TEMP*CONJG( A( I, I ) )
 DO 100, K = 1, I - 1
 TEMP = TEMP + CONJG( A( K, I ) )*B( K, J )
 100 CONTINUE
 END IF
 B( I, J ) = ALPHA*TEMP
 110 CONTINUE
 120 CONTINUE
 ELSE
 DO 160, J = 1, N
 DO 150, I = 1, M
 TEMP = B( I, J )
 IF( NOCONJ )THEN
 IF( NOUNIT )
 $ TEMP = TEMP*A( I, I )
 DO 130, K = I + 1, M
 TEMP = TEMP + A( K, I )*B( K, J )
 130 CONTINUE
 ELSE
 IF( NOUNIT )
 $ TEMP = TEMP*CONJG( A( I, I ) )
 DO 140, K = I + 1, M
 TEMP = TEMP + CONJG( A( K, I ) )*B( K, J )
 140 CONTINUE
 END IF
 B( I, J ) = ALPHA*TEMP
 150 CONTINUE
 160 CONTINUE
 END IF
 END IF
 ELSE
 IF( LSAME( TRANSA, 'N' ) .OR. LSAME( TRANSA, 'R' ))THEN
*
* Form B := alpha*B*A.
*
 IF( UPPER )THEN
 DO 200, J = N, 1, -1
 TEMP = ALPHA
 IF (NOCONJ) THEN
 IF( NOUNIT )
 $ TEMP = TEMP*A( J, J )
 ELSE
 IF( NOUNIT )
 $ TEMP = TEMP*CONJG(A( J, J ))
 ENDIF
 DO 170, I = 1, M
 B( I, J ) = TEMP*B( I, J )
 170 CONTINUE
 DO 190, K = 1, J - 1
 IF( A( K, J ).NE.ZERO )THEN
 IF (NOCONJ) THEN
 TEMP = ALPHA*A( K, J )
 ELSE
 TEMP = ALPHA*CONJG(A( K, J ))
 ENDIF
 DO 180, I = 1, M
 B( I, J ) = B( I, J ) + TEMP*B( I, K )
 180 CONTINUE
 END IF
 190 CONTINUE
 200 CONTINUE
 ELSE
 DO 240, J = 1, N
 TEMP = ALPHA
 IF (NOCONJ) THEN
 IF( NOUNIT )
 $ TEMP = TEMP*A( J, J )
 ELSE
 IF( NOUNIT )
 $ TEMP = TEMP*CONJG(A( J, J ))
 ENDIF
 DO 210, I = 1, M
 B( I, J ) = TEMP*B( I, J )
 210 CONTINUE
 DO 230, K = J + 1, N
 IF( A( K, J ).NE.ZERO )THEN
 IF (NOCONJ) THEN
 TEMP = ALPHA*A( K, J )
 ELSE
 TEMP = ALPHA*CONJG(A( K, J ))
 ENDIF
 DO 220, I = 1, M
 B( I, J ) = B( I, J ) + TEMP*B( I, K )
 220 CONTINUE
 END IF
 230 CONTINUE
 240 CONTINUE
 END IF
 ELSE
*
* Form B := alpha*B*A' or B := alpha*B*conjg( A' ).
*
 IF( UPPER )THEN
 DO 280, K = 1, N
 DO 260, J = 1, K - 1
 IF( A( J, K ).NE.ZERO )THEN
 IF( NOCONJ )THEN
 TEMP = ALPHA*A( J, K )
 ELSE
 TEMP = ALPHA*CONJG( A( J, K ) )
 END IF
 DO 250, I = 1, M
 B( I, J ) = B( I, J ) + TEMP*B( I, K )
 250 CONTINUE
 END IF
 260 CONTINUE
 TEMP = ALPHA
 IF( NOUNIT )THEN
 IF( NOCONJ )THEN
 TEMP = TEMP*A( K, K )
 ELSE
 TEMP = TEMP*CONJG( A( K, K ) )
 END IF
 END IF
 IF( TEMP.NE.ONE )THEN
 DO 270, I = 1, M
 B( I, K ) = TEMP*B( I, K )
 270 CONTINUE
 END IF
 280 CONTINUE
 ELSE
 DO 320, K = N, 1, -1
 DO 300, J = K + 1, N
 IF( A( J, K ).NE.ZERO )THEN
 IF( NOCONJ )THEN
 TEMP = ALPHA*A( J, K )
 ELSE
 TEMP = ALPHA*CONJG( A( J, K ) )
 END IF
 DO 290, I = 1, M
 B( I, J ) = B( I, J ) + TEMP*B( I, K )
 290 CONTINUE
 END IF
 300 CONTINUE
 TEMP = ALPHA
 IF( NOUNIT )THEN
 IF( NOCONJ )THEN
 TEMP = TEMP*A( K, K )
 ELSE
 TEMP = TEMP*CONJG( A( K, K ) )
 END IF
 END IF
 IF( TEMP.NE.ONE )THEN
 DO 310, I = 1, M
 B( I, K ) = TEMP*B( I, K )
 310 CONTINUE
 END IF
 320 CONTINUE
 END IF
 END IF
 END IF
*
 RETURN
*
* End of CTRMM .
*
 END

一键复制编辑原始数据按行查看历史

Zhang Xianyi 提交于 2011年01月24日 22:54 +08:00 . Import GotoBLAS2 1.13 BSD version codes.

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SUBROUTINECTRMMF(SIDE,UPLO,TRANSA,DIAG,M,N,ALPHA,A,LDA,
$B,LDB)
*..ScalarArguments..
CHARACTER*1SIDE,UPLO,TRANSA,DIAG
INTEGERM,N,LDA,LDB
COMPLEXALPHA
*..ArrayArguments..
COMPLEXA(LDA,*),B(LDB,*)
*..
*
*Purpose
*=======
*
*CTRMMperformsoneofthematrix-matrixoperations
*
*B:=alpha*op(A)*B,orB:=alpha*B*op(A)
*
*wherealphaisascalar,Bisanmbynmatrix,Aisaunit,or
*non-unit,upperorlowertriangularmatrixandop(A)isoneof
*
*op(A)=Aorop(A)=A' or op( A ) = conjg( A').
*
*Parameters
*==========
*
*SIDE-CHARACTER*1.
*Onentry,SIDEspecifieswhetherop(A)multipliesBfrom
*theleftorrightasfollows:
*
*SIDE='L'or'l'B:=alpha*op(A)*B.
*
*SIDE='R'or'r'B:=alpha*B*op(A).
*
*Unchangedonexit.
*
*UPLO-CHARACTER*1.
*Onentry,UPLOspecifieswhetherthematrixAisanupperor
*lowertriangularmatrixasfollows:
*
*UPLO='U'or'u'Aisanuppertriangularmatrix.
*
*UPLO='L'or'l'Aisalowertriangularmatrix.
*
*Unchangedonexit.
*
*TRANSA-CHARACTER*1.
*Onentry,TRANSAspecifiestheformofop(A)tobeusedin
*thematrixmultiplicationasfollows:
*
*TRANSA='N'or'n'op(A)=A.
*
*TRANSA='T'or't'op(A)=A'.
*
* TRANSA = 'C' or 'c' op( A ) = conjg( A').
*
*Unchangedonexit.
*
*DIAG-CHARACTER*1.
*Onentry,DIAGspecifieswhetherornotAisunittriangular
*asfollows:
*
*DIAG='U'or'u'Aisassumedtobeunittriangular.
*
*DIAG='N'or'n'Aisnotassumedtobeunit
*triangular.
*
*Unchangedonexit.
*
*M-INTEGER.
*Onentry,MspecifiesthenumberofrowsofB.Mmustbeat
*leastzero.
*Unchangedonexit.
*
*N-INTEGER.
*Onentry,NspecifiesthenumberofcolumnsofB.Nmustbe
*atleastzero.
*Unchangedonexit.
*
*ALPHA-COMPLEX.
*Onentry,ALPHAspecifiesthescalaralpha.Whenalphais
*zerothenAisnotreferencedandBneednotbesetbefore
*entry.
*Unchangedonexit.
*
*A-COMPLEXarrayofDIMENSION(LDA,k),wherekism
*whenSIDE='L'or'l'andisnwhenSIDE='R'or'r'.
*BeforeentrywithUPLO='U'or'u',theleadingkbyk
*uppertriangularpartofthearrayAmustcontaintheupper
*triangularmatrixandthestrictlylowertriangularpartof
*Aisnotreferenced.
*BeforeentrywithUPLO='L'or'l',theleadingkbyk
*lowertriangularpartofthearrayAmustcontainthelower
*triangularmatrixandthestrictlyuppertriangularpartof
*Aisnotreferenced.
*NotethatwhenDIAG='U'or'u',thediagonalelementsof
*Aarenotreferencedeither,butareassumedtobeunity.
*Unchangedonexit.
*
*LDA-INTEGER.
*Onentry,LDAspecifiesthefirstdimensionofAasdeclared
*inthecalling(sub)program.WhenSIDE='L'or'l'then
*LDAmustbeatleastmax(1,m),whenSIDE='R'or'r'
*thenLDAmustbeatleastmax(1,n).
*Unchangedonexit.
*
*B-COMPLEXarrayofDIMENSION(LDB,n).
*Beforeentry,theleadingmbynpartofthearrayBmust
*containthematrixB,andonexitisoverwrittenbythe
*transformedmatrix.
*
*LDB-INTEGER.
*Onentry,LDBspecifiesthefirstdimensionofBasdeclared
*inthecalling(sub)program.LDBmustbeatleast
*max(1,m).
*Unchangedonexit.
*
*
*Level3Blasroutine.
*
*--Writtenon8-February-1989.
*JackDongarra,ArgonneNationalLaboratory.
*IainDuff,AEREHarwell.
*JeremyDuCroz,NumericalAlgorithmsGroupLtd.
*SvenHammarling,NumericalAlgorithmsGroupLtd.
*
*
*..ExternalFunctions..
LOGICALLSAME
EXTERNALLSAME
*..ExternalSubroutines..
EXTERNALXERBLA
*..IntrinsicFunctions..
INTRINSICCONJG,MAX
*..LocalScalars..
LOGICALLSIDE,NOCONJ,NOUNIT,UPPER
INTEGERI,INFO,J,K,NROWA
COMPLEXTEMP
*..Parameters..
COMPLEXONE
PARAMETER(ONE=(1.0D+0,0.0D+0))
COMPLEXZERO
PARAMETER(ZERO=(0.0D+0,0.0D+0))
*..
*..ExecutableStatements..
*
*Testtheinputparameters.
*
LSIDE=LSAME(SIDE,'L')
IF(LSIDE)THEN
NROWA=M
ELSE
NROWA=N
ENDIF
NOCONJ=LSAME(TRANSA,'N').OR.LSAME(TRANSA,'T')
NOUNIT=LSAME(DIAG,'N')
UPPER=LSAME(UPLO,'U')
*
INFO=0
IF((.NOT.LSIDE).AND.
$(.NOT.LSAME(SIDE,'R')))THEN
INFO=1
ELSEIF((.NOT.UPPER).AND.
$(.NOT.LSAME(UPLO,'L')))THEN
INFO=2
ELSEIF((.NOT.LSAME(TRANSA,'N')).AND.
$(.NOT.LSAME(TRANSA,'T')).AND.
$(.NOT.LSAME(TRANSA,'R')).AND.
$(.NOT.LSAME(TRANSA,'C')))THEN
INFO=3
ELSEIF((.NOT.LSAME(DIAG,'U')).AND.
$(.NOT.LSAME(DIAG,'N')))THEN
INFO=4
ELSEIF(M.LT.0)THEN
INFO=5
ELSEIF(N.LT.0)THEN
INFO=6
ELSEIF(LDA.LT.MAX(1,NROWA))THEN
INFO=9
ELSEIF(LDB.LT.MAX(1,M))THEN
INFO=11
ENDIF
IF(INFO.NE.0)THEN
CALLXERBLA('CTRMM ',INFO)
RETURN
ENDIF
*
*Quickreturnifpossible.
*
IF(N.EQ.0)
$RETURN
*
*Andwhenalpha.eq.zero.
*
IF(ALPHA.EQ.ZERO)THEN
DO20,J=1,N
DO10,I=1,M
B(I,J)=ZERO
10CONTINUE
20CONTINUE
RETURN
ENDIF
*
*Starttheoperations.
*
IF(LSIDE)THEN
IF(LSAME(TRANSA,'N').OR.LSAME(TRANSA,'R'))THEN
*
*FormB:=alpha*A*B.
*
IF(UPPER)THEN
DO50,J=1,N
DO40,K=1,M
IF(B(K,J).NE.ZERO)THEN
TEMP=ALPHA*B(K,J)
IF(NOCONJ)THEN
DO30,I=1,K-1
B(I,J)=B(I,J)+TEMP*A(I,K)
30CONTINUE
IF(NOUNIT)
$TEMP=TEMP*A(K,K)
B(K,J)=TEMP
ELSE
DO35,I=1,K-1
B(I,J)=B(I,J)+TEMP*CONJG(A(I,K))
35CONTINUE
IF(NOUNIT)
$TEMP=TEMP*CONJG(A(K,K))
B(K,J)=TEMP
ENDIF
ENDIF
40CONTINUE
50CONTINUE
ELSE
DO80,J=1,N
DO70K=M,1,-1
IF(B(K,J).NE.ZERO)THEN
TEMP=ALPHA*B(K,J)
B(K,J)=TEMP
IF(NOCONJ)THEN
IF(NOUNIT)
$B(K,J)=B(K,J)*A(K,K)
DO60,I=K+1,M
B(I,J)=B(I,J)+TEMP*A(I,K)
60CONTINUE
ELSE
IF(NOUNIT)
$B(K,J)=B(K,J)*CONJG(A(K,K))
DO65,I=K+1,M
B(I,J)=B(I,J)+TEMP*CONJG(A(I,K))
65CONTINUE
ENDIF
ENDIF
70CONTINUE
80CONTINUE
ENDIF
ELSE
*
*FormB:=alpha*A'*B or B := alpha*conjg( A')*B.
*
IF(UPPER)THEN
DO120,J=1,N
DO110,I=M,1,-1
TEMP=B(I,J)
IF(NOCONJ)THEN
IF(NOUNIT)
$TEMP=TEMP*A(I,I)
DO90,K=1,I-1
TEMP=TEMP+A(K,I)*B(K,J)
90CONTINUE
ELSE
IF(NOUNIT)
$TEMP=TEMP*CONJG(A(I,I))
DO100,K=1,I-1
TEMP=TEMP+CONJG(A(K,I))*B(K,J)
100CONTINUE
ENDIF
B(I,J)=ALPHA*TEMP
110CONTINUE
120CONTINUE
ELSE
DO160,J=1,N
DO150,I=1,M
TEMP=B(I,J)
IF(NOCONJ)THEN
IF(NOUNIT)
$TEMP=TEMP*A(I,I)
DO130,K=I+1,M
TEMP=TEMP+A(K,I)*B(K,J)
130CONTINUE
ELSE
IF(NOUNIT)
$TEMP=TEMP*CONJG(A(I,I))
DO140,K=I+1,M
TEMP=TEMP+CONJG(A(K,I))*B(K,J)
140CONTINUE
ENDIF
B(I,J)=ALPHA*TEMP
150CONTINUE
160CONTINUE
ENDIF
ENDIF
ELSE
IF(LSAME(TRANSA,'N').OR.LSAME(TRANSA,'R'))THEN
*
*FormB:=alpha*B*A.
*
IF(UPPER)THEN
DO200,J=N,1,-1
TEMP=ALPHA
IF(NOCONJ)THEN
IF(NOUNIT)
$TEMP=TEMP*A(J,J)
ELSE
IF(NOUNIT)
$TEMP=TEMP*CONJG(A(J,J))
ENDIF
DO170,I=1,M
B(I,J)=TEMP*B(I,J)
170CONTINUE
DO190,K=1,J-1
IF(A(K,J).NE.ZERO)THEN
IF(NOCONJ)THEN
TEMP=ALPHA*A(K,J)
ELSE
TEMP=ALPHA*CONJG(A(K,J))
ENDIF
DO180,I=1,M
B(I,J)=B(I,J)+TEMP*B(I,K)
180CONTINUE
ENDIF
190CONTINUE
200CONTINUE
ELSE
DO240,J=1,N
TEMP=ALPHA
IF(NOCONJ)THEN
IF(NOUNIT)
$TEMP=TEMP*A(J,J)
ELSE
IF(NOUNIT)
$TEMP=TEMP*CONJG(A(J,J))
ENDIF
DO210,I=1,M
B(I,J)=TEMP*B(I,J)
210CONTINUE
DO230,K=J+1,N
IF(A(K,J).NE.ZERO)THEN
IF(NOCONJ)THEN
TEMP=ALPHA*A(K,J)
ELSE
TEMP=ALPHA*CONJG(A(K,J))
ENDIF
DO220,I=1,M
B(I,J)=B(I,J)+TEMP*B(I,K)
220CONTINUE
ENDIF
230CONTINUE
240CONTINUE
ENDIF
ELSE
*
*FormB:=alpha*B*A' or B := alpha*B*conjg( A').
*
IF(UPPER)THEN
DO280,K=1,N
DO260,J=1,K-1
IF(A(J,K).NE.ZERO)THEN
IF(NOCONJ)THEN
TEMP=ALPHA*A(J,K)
ELSE
TEMP=ALPHA*CONJG(A(J,K))
ENDIF
DO250,I=1,M
B(I,J)=B(I,J)+TEMP*B(I,K)
250CONTINUE
ENDIF
260CONTINUE
TEMP=ALPHA
IF(NOUNIT)THEN
IF(NOCONJ)THEN
TEMP=TEMP*A(K,K)
ELSE
TEMP=TEMP*CONJG(A(K,K))
ENDIF
ENDIF
IF(TEMP.NE.ONE)THEN
DO270,I=1,M
B(I,K)=TEMP*B(I,K)
270CONTINUE
ENDIF
280CONTINUE
ELSE
DO320,K=N,1,-1
DO300,J=K+1,N
IF(A(J,K).NE.ZERO)THEN
IF(NOCONJ)THEN
TEMP=ALPHA*A(J,K)
ELSE
TEMP=ALPHA*CONJG(A(J,K))
ENDIF
DO290,I=1,M
B(I,J)=B(I,J)+TEMP*B(I,K)
290CONTINUE
ENDIF
300CONTINUE
TEMP=ALPHA
IF(NOUNIT)THEN
IF(NOCONJ)THEN
TEMP=TEMP*A(K,K)
ELSE
TEMP=TEMP*CONJG(A(K,K))
ENDIF
ENDIF
IF(TEMP.NE.ONE)THEN
DO310,I=1,M
B(I,K)=TEMP*B(I,K)
310CONTINUE
ENDIF
320CONTINUE
ENDIF
ENDIF
ENDIF
*
RETURN
*
*EndofCTRMM.
*
END