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author | jofret | 2009-04-28 07:17:00 +0000 |
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committer | jofret | 2009-04-28 07:17:00 +0000 |
commit | 8c8d2f518968ce7057eec6aa5cd5aec8faab861a (patch) | |
tree | 3dd1788b71d6a3ce2b73d2d475a3133580e17530 /src/lib/lapack/dpotrs.f | |
parent | 9f652ffc16a310ac6641a9766c5b9e2671e0e9cb (diff) | |
download | scilab2c-8c8d2f518968ce7057eec6aa5cd5aec8faab861a.tar.gz scilab2c-8c8d2f518968ce7057eec6aa5cd5aec8faab861a.tar.bz2 scilab2c-8c8d2f518968ce7057eec6aa5cd5aec8faab861a.zip |
Moving lapack to right place
Diffstat (limited to 'src/lib/lapack/dpotrs.f')
-rw-r--r-- | src/lib/lapack/dpotrs.f | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/src/lib/lapack/dpotrs.f b/src/lib/lapack/dpotrs.f deleted file mode 100644 index 0273655e..00000000 --- a/src/lib/lapack/dpotrs.f +++ /dev/null @@ -1,132 +0,0 @@ - SUBROUTINE DPOTRS( UPLO, N, NRHS, A, LDA, B, LDB, INFO ) -* -* -- LAPACK routine (version 3.1) -- -* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. -* November 2006 -* -* .. Scalar Arguments .. - CHARACTER UPLO - INTEGER INFO, LDA, LDB, N, NRHS -* .. -* .. Array Arguments .. - DOUBLE PRECISION A( LDA, * ), B( LDB, * ) -* .. -* -* Purpose -* ======= -* -* DPOTRS solves a system of linear equations A*X = B with a symmetric -* positive definite matrix A using the Cholesky factorization -* A = U**T*U or A = L*L**T computed by DPOTRF. -* -* Arguments -* ========= -* -* UPLO (input) CHARACTER*1 -* = 'U': Upper triangle of A is stored; -* = 'L': Lower triangle of A is stored. -* -* N (input) INTEGER -* The order of the matrix A. N >= 0. -* -* NRHS (input) INTEGER -* The number of right hand sides, i.e., the number of columns -* of the matrix B. NRHS >= 0. -* -* A (input) DOUBLE PRECISION array, dimension (LDA,N) -* The triangular factor U or L from the Cholesky factorization -* A = U**T*U or A = L*L**T, as computed by DPOTRF. -* -* LDA (input) INTEGER -* The leading dimension of the array A. LDA >= max(1,N). -* -* B (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS) -* On entry, the right hand side matrix B. -* On exit, the solution matrix X. -* -* LDB (input) INTEGER -* The leading dimension of the array B. LDB >= max(1,N). -* -* INFO (output) INTEGER -* = 0: successful exit -* < 0: if INFO = -i, the i-th argument had an illegal value -* -* ===================================================================== -* -* .. Parameters .. - DOUBLE PRECISION ONE - PARAMETER ( ONE = 1.0D+0 ) -* .. -* .. Local Scalars .. - LOGICAL UPPER -* .. -* .. External Functions .. - LOGICAL LSAME - EXTERNAL LSAME -* .. -* .. External Subroutines .. - EXTERNAL DTRSM, XERBLA -* .. -* .. Intrinsic Functions .. - INTRINSIC MAX -* .. -* .. Executable Statements .. -* -* Test the input parameters. -* - INFO = 0 - UPPER = LSAME( UPLO, 'U' ) - IF( .NOT.UPPER .AND. .NOT.LSAME( UPLO, 'L' ) ) THEN - INFO = -1 - ELSE IF( N.LT.0 ) THEN - INFO = -2 - ELSE IF( NRHS.LT.0 ) THEN - INFO = -3 - ELSE IF( LDA.LT.MAX( 1, N ) ) THEN - INFO = -5 - ELSE IF( LDB.LT.MAX( 1, N ) ) THEN - INFO = -7 - END IF - IF( INFO.NE.0 ) THEN - CALL XERBLA( 'DPOTRS', -INFO ) - RETURN - END IF -* -* Quick return if possible -* - IF( N.EQ.0 .OR. NRHS.EQ.0 ) - $ RETURN -* - IF( UPPER ) THEN -* -* Solve A*X = B where A = U'*U. -* -* Solve U'*X = B, overwriting B with X. -* - CALL DTRSM( 'Left', 'Upper', 'Transpose', 'Non-unit', N, NRHS, - $ ONE, A, LDA, B, LDB ) -* -* Solve U*X = B, overwriting B with X. -* - CALL DTRSM( 'Left', 'Upper', 'No transpose', 'Non-unit', N, - $ NRHS, ONE, A, LDA, B, LDB ) - ELSE -* -* Solve A*X = B where A = L*L'. -* -* Solve L*X = B, overwriting B with X. -* - CALL DTRSM( 'Left', 'Lower', 'No transpose', 'Non-unit', N, - $ NRHS, ONE, A, LDA, B, LDB ) -* -* Solve L'*X = B, overwriting B with X. -* - CALL DTRSM( 'Left', 'Lower', 'Transpose', 'Non-unit', N, NRHS, - $ ONE, A, LDA, B, LDB ) - END IF -* - RETURN -* -* End of DPOTRS -* - END |