removed lapack 3.6.0
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*> \brief \b CQRT05
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*
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* =========== DOCUMENTATION ===========
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*
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* Online html documentation available at
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* http://www.netlib.org/lapack/explore-html/
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*
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* Definition:
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* ===========
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*
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* SUBROUTINE CQRT05(M,N,L,NB,RESULT)
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*
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* .. Scalar Arguments ..
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* INTEGER LWORK, M, N, L, NB, LDT
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* .. Return values ..
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* REAL RESULT(6)
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*
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*
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*> \par Purpose:
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* =============
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*>
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*> \verbatim
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*>
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*> CQRT05 tests CTPQRT and CTPMQRT.
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*> \endverbatim
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*
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* Arguments:
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* ==========
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*
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*> \param[in] M
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*> \verbatim
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*> M is INTEGER
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*> Number of rows in lower part of the test matrix.
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*> \endverbatim
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*>
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*> \param[in] N
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*> \verbatim
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*> N is INTEGER
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*> Number of columns in test matrix.
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*> \endverbatim
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*>
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*> \param[in] L
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*> \verbatim
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*> L is INTEGER
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*> The number of rows of the upper trapezoidal part the
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*> lower test matrix. 0 <= L <= M.
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*> \endverbatim
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*>
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*> \param[in] NB
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*> \verbatim
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*> NB is INTEGER
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*> Block size of test matrix. NB <= N.
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*> \endverbatim
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*>
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*> \param[out] RESULT
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*> \verbatim
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*> RESULT is REAL array, dimension (6)
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*> Results of each of the six tests below.
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*>
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*> RESULT(1) = | A - Q R |
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*> RESULT(2) = | I - Q^H Q |
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*> RESULT(3) = | Q C - Q C |
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*> RESULT(4) = | Q^H C - Q^H C |
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*> RESULT(5) = | C Q - C Q |
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*> RESULT(6) = | C Q^H - C Q^H |
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*> \endverbatim
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*
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* Authors:
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* ========
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*
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*> \author Univ. of Tennessee
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*> \author Univ. of California Berkeley
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*> \author Univ. of Colorado Denver
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*> \author NAG Ltd.
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*
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*> \date April 2012
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*
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*> \ingroup complex_lin
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*
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* =====================================================================
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SUBROUTINE CQRT05(M,N,L,NB,RESULT)
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IMPLICIT NONE
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*
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* -- LAPACK test routine (version 3.6.1) --
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* -- LAPACK is a software package provided by Univ. of Tennessee, --
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* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
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* April 2012
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*
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* .. Scalar Arguments ..
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INTEGER LWORK, M, N, L, NB, LDT
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* .. Return values ..
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REAL RESULT(6)
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*
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* =====================================================================
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*
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* ..
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* .. Local allocatable arrays
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COMPLEX, ALLOCATABLE :: AF(:,:), Q(:,:),
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$ R(:,:), WORK( : ), T(:,:),
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$ CF(:,:), DF(:,:), A(:,:), C(:,:), D(:,:)
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REAL, ALLOCATABLE :: RWORK(:)
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*
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* .. Parameters ..
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REAL ZERO
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COMPLEX ONE, CZERO
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PARAMETER( ZERO = 0.0, ONE = (1.0,0.0), CZERO=(0.0,0.0) )
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* ..
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* .. Local Scalars ..
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INTEGER INFO, J, K, M2, NP1
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REAL ANORM, EPS, RESID, CNORM, DNORM
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* ..
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* .. Local Arrays ..
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INTEGER ISEED( 4 )
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* ..
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* .. External Functions ..
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REAL SLAMCH
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REAL CLANGE, CLANSY
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LOGICAL LSAME
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EXTERNAL SLAMCH, CLANGE, CLANSY, LSAME
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* ..
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* .. Data statements ..
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DATA ISEED / 1988, 1989, 1990, 1991 /
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*
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EPS = SLAMCH( 'Epsilon' )
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K = N
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M2 = M+N
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IF( M.GT.0 ) THEN
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NP1 = N+1
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ELSE
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NP1 = 1
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END IF
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LWORK = M2*M2*NB
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*
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* Dynamically allocate all arrays
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*
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ALLOCATE(A(M2,N),AF(M2,N),Q(M2,M2),R(M2,M2),RWORK(M2),
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$ WORK(LWORK),T(NB,N),C(M2,N),CF(M2,N),
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$ D(N,M2),DF(N,M2) )
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*
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* Put random stuff into A
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*
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LDT=NB
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CALL CLASET( 'Full', M2, N, CZERO, CZERO, A, M2 )
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CALL CLASET( 'Full', NB, N, CZERO, CZERO, T, NB )
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DO J=1,N
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CALL CLARNV( 2, ISEED, J, A( 1, J ) )
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END DO
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IF( M.GT.0 ) THEN
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DO J=1,N
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CALL CLARNV( 2, ISEED, M-L, A( MIN(N+M,N+1), J ) )
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END DO
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END IF
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IF( L.GT.0 ) THEN
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DO J=1,N
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CALL CLARNV( 2, ISEED, MIN(J,L), A( MIN(N+M,N+M-L+1), J ) )
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END DO
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END IF
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*
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* Copy the matrix A to the array AF.
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*
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CALL CLACPY( 'Full', M2, N, A, M2, AF, M2 )
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*
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* Factor the matrix A in the array AF.
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*
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CALL CTPQRT( M,N,L,NB,AF,M2,AF(NP1,1),M2,T,LDT,WORK,INFO)
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*
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* Generate the (M+N)-by-(M+N) matrix Q by applying H to I
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*
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CALL CLASET( 'Full', M2, M2, CZERO, ONE, Q, M2 )
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CALL CGEMQRT( 'R', 'N', M2, M2, K, NB, AF, M2, T, LDT, Q, M2,
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$ WORK, INFO )
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*
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* Copy R
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*
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CALL CLASET( 'Full', M2, N, CZERO, CZERO, R, M2 )
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CALL CLACPY( 'Upper', M2, N, AF, M2, R, M2 )
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*
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* Compute |R - Q'*A| / |A| and store in RESULT(1)
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*
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CALL CGEMM( 'C', 'N', M2, N, M2, -ONE, Q, M2, A, M2, ONE, R, M2 )
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ANORM = CLANGE( '1', M2, N, A, M2, RWORK )
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RESID = CLANGE( '1', M2, N, R, M2, RWORK )
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IF( ANORM.GT.ZERO ) THEN
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RESULT( 1 ) = RESID / (EPS*ANORM*MAX(1,M2))
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ELSE
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RESULT( 1 ) = ZERO
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END IF
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*
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* Compute |I - Q'*Q| and store in RESULT(2)
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*
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CALL CLASET( 'Full', M2, M2, CZERO, ONE, R, M2 )
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CALL CHERK( 'U', 'C', M2, M2, REAL(-ONE), Q, M2, REAL(ONE),
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$ R, M2 )
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RESID = CLANSY( '1', 'Upper', M2, R, M2, RWORK )
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RESULT( 2 ) = RESID / (EPS*MAX(1,M2))
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*
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* Generate random m-by-n matrix C and a copy CF
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*
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DO J=1,N
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CALL CLARNV( 2, ISEED, M2, C( 1, J ) )
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END DO
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CNORM = CLANGE( '1', M2, N, C, M2, RWORK)
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CALL CLACPY( 'Full', M2, N, C, M2, CF, M2 )
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*
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* Apply Q to C as Q*C
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*
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CALL CTPMQRT( 'L','N', M,N,K,L,NB,AF(NP1,1),M2,T,LDT,CF,M2,
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$ CF(NP1,1),M2,WORK,INFO)
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*
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* Compute |Q*C - Q*C| / |C|
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*
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CALL CGEMM( 'N', 'N', M2, N, M2, -ONE, Q, M2, C, M2, ONE, CF, M2 )
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RESID = CLANGE( '1', M2, N, CF, M2, RWORK )
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IF( CNORM.GT.ZERO ) THEN
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RESULT( 3 ) = RESID / (EPS*MAX(1,M2)*CNORM)
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ELSE
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RESULT( 3 ) = ZERO
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END IF
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*
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* Copy C into CF again
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*
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CALL CLACPY( 'Full', M2, N, C, M2, CF, M2 )
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*
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* Apply Q to C as QT*C
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*
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CALL CTPMQRT( 'L','C',M,N,K,L,NB,AF(NP1,1),M2,T,LDT,CF,M2,
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$ CF(NP1,1),M2,WORK,INFO)
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*
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* Compute |QT*C - QT*C| / |C|
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*
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CALL CGEMM('C','N',M2,N,M2,-ONE,Q,M2,C,M2,ONE,CF,M2)
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RESID = CLANGE( '1', M2, N, CF, M2, RWORK )
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IF( CNORM.GT.ZERO ) THEN
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RESULT( 4 ) = RESID / (EPS*MAX(1,M2)*CNORM)
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ELSE
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RESULT( 4 ) = ZERO
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END IF
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*
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* Generate random n-by-m matrix D and a copy DF
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*
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DO J=1,M2
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CALL CLARNV( 2, ISEED, N, D( 1, J ) )
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END DO
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DNORM = CLANGE( '1', N, M2, D, N, RWORK)
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CALL CLACPY( 'Full', N, M2, D, N, DF, N )
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*
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* Apply Q to D as D*Q
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*
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CALL CTPMQRT('R','N',N,M,N,L,NB,AF(NP1,1),M2,T,LDT,DF,N,
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$ DF(1,NP1),N,WORK,INFO)
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*
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* Compute |D*Q - D*Q| / |D|
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*
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CALL CGEMM('N','N',N,M2,M2,-ONE,D,N,Q,M2,ONE,DF,N)
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RESID = CLANGE('1',N, M2,DF,N,RWORK )
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IF( CNORM.GT.ZERO ) THEN
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RESULT( 5 ) = RESID / (EPS*MAX(1,M2)*DNORM)
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ELSE
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RESULT( 5 ) = ZERO
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END IF
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*
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* Copy D into DF again
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*
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CALL CLACPY('Full',N,M2,D,N,DF,N )
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*
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* Apply Q to D as D*QT
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*
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CALL CTPMQRT('R','C',N,M,N,L,NB,AF(NP1,1),M2,T,LDT,DF,N,
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$ DF(1,NP1),N,WORK,INFO)
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*
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* Compute |D*QT - D*QT| / |D|
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*
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CALL CGEMM( 'N', 'C', N, M2, M2, -ONE, D, N, Q, M2, ONE, DF, N )
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RESID = CLANGE( '1', N, M2, DF, N, RWORK )
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IF( CNORM.GT.ZERO ) THEN
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RESULT( 6 ) = RESID / (EPS*MAX(1,M2)*DNORM)
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ELSE
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RESULT( 6 ) = ZERO
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END IF
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*
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* Deallocate all arrays
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*
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DEALLOCATE ( A, AF, Q, R, RWORK, WORK, T, C, D, CF, DF)
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RETURN
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END
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