/* Subroutine */ int zpotri_(char *uplo, integer *n, doublecomplex *a, integer *lda, integer *info) { /* System generated locals */ integer a_dim1, a_offset, i__1; /* Local variables */ /* -- LAPACK routine (version 3.2) -- */ /* November 2006 */ /* Purpose */ /* ======= */ /* ZPOTRI computes the inverse of a complex Hermitian positive definite */ /* matrix A using the Cholesky factorization A = U**H*U or A = L*L**H */ /* computed by ZPOTRF. */ /* 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. */ /* A (input/output) COMPLEX*16 array, dimension (LDA,N) */ /* On entry, the triangular factor U or L from the Cholesky */ /* factorization A = U**H*U or A = L*L**H, as computed by */ /* ZPOTRF. */ /* On exit, the upper or lower triangle of the (Hermitian) */ /* inverse of A, overwriting the input factor U or L. */ /* LDA (input) INTEGER */ /* The leading dimension of the array A. LDA >= max(1,N). */ /* INFO (output) INTEGER */ /* = 0: successful exit */ /* < 0: if INFO = -i, the i-th argument had an illegal value */ /* > 0: if INFO = i, the (i,i) element of the factor U or L is */ /* zero, and the inverse could not be computed. */ /* ===================================================================== */ /* Test the input parameters. */ /* Parameter adjustments */ a_dim1 = *lda; a_offset = 1 + a_dim1; a -= a_offset; /* Function Body */ *info = 0; if (! lsame_(uplo, "U") && ! lsame_(uplo, "L")) { *info = -1; } else if (*n < 0) { *info = -2; } else if (*lda < max(1,*n)) { *info = -4; } if (*info != 0) { i__1 = -(*info); xerbla_("ZPOTRI", &i__1); return 0; } /* Quick return if possible */ if (*n == 0) { return 0; } /* Invert the triangular Cholesky factor U or L. */ ztrtri_(uplo, "Non-unit", n, &a[a_offset], lda, info); if (*info > 0) { return 0; } /* Form inv(U)*inv(U)' or inv(L)'*inv(L). */ zlauum_(uplo, n, &a[a_offset], lda, info); return 0; /* End of ZPOTRI */ } /* zpotri_ */
/* Subroutine */ int zpotri_(char *uplo, integer *n, doublecomplex *a, integer *lda, integer *info) { /* -- LAPACK routine (version 3.0) -- Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd., Courant Institute, Argonne National Lab, and Rice University March 31, 1993 Purpose ======= ZPOTRI computes the inverse of a complex Hermitian positive definite matrix A using the Cholesky factorization A = U**H*U or A = L*L**H computed by ZPOTRF. 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. A (input/output) COMPLEX*16 array, dimension (LDA,N) On entry, the triangular factor U or L from the Cholesky factorization A = U**H*U or A = L*L**H, as computed by ZPOTRF. On exit, the upper or lower triangle of the (Hermitian) inverse of A, overwriting the input factor U or L. LDA (input) INTEGER The leading dimension of the array A. LDA >= max(1,N). INFO (output) INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value > 0: if INFO = i, the (i,i) element of the factor U or L is zero, and the inverse could not be computed. ===================================================================== Test the input parameters. Parameter adjustments */ /* System generated locals */ integer a_dim1, a_offset, i__1; /* Local variables */ extern logical lsame_(char *, char *); extern /* Subroutine */ int xerbla_(char *, integer *), zlauum_( char *, integer *, doublecomplex *, integer *, integer *), ztrtri_(char *, char *, integer *, doublecomplex *, integer *, integer *); a_dim1 = *lda; a_offset = 1 + a_dim1 * 1; a -= a_offset; /* Function Body */ *info = 0; if (! lsame_(uplo, "U") && ! lsame_(uplo, "L")) { *info = -1; } else if (*n < 0) { *info = -2; } else if (*lda < max(1,*n)) { *info = -4; } if (*info != 0) { i__1 = -(*info); xerbla_("ZPOTRI", &i__1); return 0; } /* Quick return if possible */ if (*n == 0) { return 0; } /* Invert the triangular Cholesky factor U or L. */ ztrtri_(uplo, "Non-unit", n, &a[a_offset], lda, info); if (*info > 0) { return 0; } /* Form inv(U)*inv(U)' or inv(L)'*inv(L). */ zlauum_(uplo, n, &a[a_offset], lda, info); return 0; /* End of ZPOTRI */ } /* zpotri_ */
/* Subroutine */ int zchktr_(logical *dotype, integer *nn, integer *nval, integer *nnb, integer *nbval, integer *nns, integer *nsval, doublereal *thresh, logical *tsterr, integer *nmax, doublecomplex *a, doublecomplex *ainv, doublecomplex *b, doublecomplex *x, doublecomplex *xact, doublecomplex *work, doublereal *rwork, integer * nout) { /* Initialized data */ static integer iseedy[4] = { 1988,1989,1990,1991 }; static char uplos[1*2] = "U" "L"; static char transs[1*3] = "N" "T" "C"; /* Format strings */ static char fmt_9999[] = "(\002 UPLO='\002,a1,\002', DIAG='\002,a1,\002'" ", N=\002,i5,\002, NB=\002,i4,\002, type \002,i2,\002, test(\002," "i2,\002)= \002,g12.5)"; static char fmt_9998[] = "(\002 UPLO='\002,a1,\002', TRANS='\002,a1,\002" "', DIAG='\002,a1,\002', N=\002,i5,\002, NB=\002,i4,\002, type" " \002,i2,\002, test(\002,i2,\002)= \002,g12" ".5)"; static char fmt_9997[] = "(\002 NORM='\002,a1,\002', UPLO ='\002,a1,\002" "', N=\002,i5,\002,\002,11x,\002 type \002,i2,\002, test(\002,i2" ",\002)=\002,g12.5)"; static char fmt_9996[] = "(1x,a,\002( '\002,a1,\002', '\002,a1,\002', " "'\002,a1,\002', '\002,a1,\002',\002,i5,\002, ... ), type \002,i2," "\002, test(\002,i2,\002)=\002,g12.5)"; /* System generated locals */ address a__1[2], a__2[3], a__3[4]; integer i__1, i__2, i__3[2], i__4, i__5[3], i__6[4]; char ch__1[2], ch__2[3], ch__3[4]; /* Builtin functions */ /* Subroutine */ int s_copy(char *, char *, ftnlen, ftnlen), s_cat(char *, char **, integer *, integer *, ftnlen); integer s_wsfe(cilist *), do_fio(integer *, char *, ftnlen), e_wsfe(void); /* Local variables */ integer i__, k, n, nb, in, lda, inb; char diag[1]; integer imat, info; char path[3]; integer irhs, nrhs; char norm[1], uplo[1]; integer nrun; extern /* Subroutine */ int alahd_(integer *, char *); integer idiag; doublereal scale; integer nfail, iseed[4]; extern logical lsame_(char *, char *); doublereal rcond, anorm; integer itran; extern /* Subroutine */ int zget04_(integer *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, doublereal *, doublereal * ); char trans[1]; integer iuplo, nerrs; doublereal dummy; extern /* Subroutine */ int zcopy_(integer *, doublecomplex *, integer *, doublecomplex *, integer *), ztrt01_(char *, char *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, doublereal *, doublereal *, doublereal *), ztrt02_(char *, char *, char *, integer *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, doublecomplex *, doublereal *, doublereal *), ztrt03_(char *, char *, char *, integer *, integer *, doublecomplex *, integer *, doublereal *, doublereal *, doublereal *, doublecomplex *, integer *, doublecomplex *, integer *, doublecomplex *, doublereal *); char xtype[1]; extern /* Subroutine */ int ztrt05_(char *, char *, char *, integer *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, doublereal *, doublereal *, doublereal *), ztrt06_(doublereal *, doublereal *, char *, char *, integer *, doublecomplex *, integer *, doublereal *, doublereal *), alaerh_(char *, char *, integer *, integer *, char *, integer *, integer *, integer *, integer *, integer *, integer *, integer *, integer *, integer *); doublereal rcondc, rcondi; extern /* Subroutine */ int alasum_(char *, integer *, integer *, integer *, integer *); doublereal rcondo, ainvnm; extern /* Subroutine */ int xlaenv_(integer *, integer *), zlacpy_(char *, integer *, integer *, doublecomplex *, integer *, doublecomplex * , integer *), zlarhs_(char *, char *, char *, char *, integer *, integer *, integer *, integer *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, integer *, integer *); extern doublereal zlantr_(char *, char *, char *, integer *, integer *, doublecomplex *, integer *, doublereal *); doublereal result[9]; extern /* Subroutine */ int zlatrs_(char *, char *, char *, char *, integer *, doublecomplex *, integer *, doublecomplex *, doublereal *, doublereal *, integer *), zlattr_(integer *, char *, char *, char *, integer *, integer *, doublecomplex *, integer *, doublecomplex *, doublecomplex *, doublereal *, integer *), ztrcon_(char *, char *, char *, integer *, doublecomplex *, integer *, doublereal *, doublecomplex *, doublereal *, integer *), zerrtr_(char *, integer *), ztrrfs_(char *, char *, char *, integer *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, doublereal *, doublereal *, doublecomplex *, doublereal *, integer *), ztrtri_(char *, char *, integer *, doublecomplex *, integer *, integer *), ztrtrs_(char *, char *, char *, integer *, integer *, doublecomplex *, integer *, doublecomplex *, integer *, integer *); /* Fortran I/O blocks */ static cilist io___27 = { 0, 0, 0, fmt_9999, 0 }; static cilist io___36 = { 0, 0, 0, fmt_9998, 0 }; static cilist io___38 = { 0, 0, 0, fmt_9997, 0 }; static cilist io___40 = { 0, 0, 0, fmt_9996, 0 }; static cilist io___41 = { 0, 0, 0, fmt_9996, 0 }; /* -- LAPACK test routine (version 3.1) -- */ /* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */ /* November 2006 */ /* .. Scalar Arguments .. */ /* .. */ /* .. Array Arguments .. */ /* .. */ /* Purpose */ /* ======= */ /* ZCHKTR tests ZTRTRI, -TRS, -RFS, and -CON, and ZLATRS */ /* Arguments */ /* ========= */ /* DOTYPE (input) LOGICAL array, dimension (NTYPES) */ /* The matrix types to be used for testing. Matrices of type j */ /* (for 1 <= j <= NTYPES) are used for testing if DOTYPE(j) = */ /* .TRUE.; if DOTYPE(j) = .FALSE., then type j is not used. */ /* NN (input) INTEGER */ /* The number of values of N contained in the vector NVAL. */ /* NVAL (input) INTEGER array, dimension (NN) */ /* The values of the matrix column dimension N. */ /* NNB (input) INTEGER */ /* The number of values of NB contained in the vector NBVAL. */ /* NBVAL (input) INTEGER array, dimension (NNB) */ /* The values of the blocksize NB. */ /* NNS (input) INTEGER */ /* The number of values of NRHS contained in the vector NSVAL. */ /* NSVAL (input) INTEGER array, dimension (NNS) */ /* The values of the number of right hand sides NRHS. */ /* THRESH (input) DOUBLE PRECISION */ /* The threshold value for the test ratios. A result is */ /* included in the output file if RESULT >= THRESH. To have */ /* every test ratio printed, use THRESH = 0. */ /* TSTERR (input) LOGICAL */ /* Flag that indicates whether error exits are to be tested. */ /* NMAX (input) INTEGER */ /* The leading dimension of the work arrays. */ /* NMAX >= the maximum value of N in NVAL. */ /* A (workspace) COMPLEX*16 array, dimension (NMAX*NMAX) */ /* AINV (workspace) COMPLEX*16 array, dimension (NMAX*NMAX) */ /* B (workspace) COMPLEX*16 array, dimension (NMAX*NSMAX) */ /* where NSMAX is the largest entry in NSVAL. */ /* X (workspace) COMPLEX*16 array, dimension (NMAX*NSMAX) */ /* XACT (workspace) COMPLEX*16 array, dimension (NMAX*NSMAX) */ /* WORK (workspace) COMPLEX*16 array, dimension */ /* (NMAX*max(3,NSMAX)) */ /* RWORK (workspace) DOUBLE PRECISION array, dimension */ /* (max(NMAX,2*NSMAX)) */ /* NOUT (input) INTEGER */ /* The unit number for output. */ /* ===================================================================== */ /* .. Parameters .. */ /* .. */ /* .. Local Scalars .. */ /* .. */ /* .. Local Arrays .. */ /* .. */ /* .. External Functions .. */ /* .. */ /* .. External Subroutines .. */ /* .. */ /* .. Scalars in Common .. */ /* .. */ /* .. Common blocks .. */ /* .. */ /* .. Intrinsic Functions .. */ /* .. */ /* .. Data statements .. */ /* Parameter adjustments */ --rwork; --work; --xact; --x; --b; --ainv; --a; --nsval; --nbval; --nval; --dotype; /* Function Body */ /* .. */ /* .. Executable Statements .. */ /* Initialize constants and the random number seed. */ s_copy(path, "Zomplex precision", (ftnlen)1, (ftnlen)17); s_copy(path + 1, "TR", (ftnlen)2, (ftnlen)2); nrun = 0; nfail = 0; nerrs = 0; for (i__ = 1; i__ <= 4; ++i__) { iseed[i__ - 1] = iseedy[i__ - 1]; /* L10: */ } /* Test the error exits */ if (*tsterr) { zerrtr_(path, nout); } infoc_1.infot = 0; i__1 = *nn; for (in = 1; in <= i__1; ++in) { /* Do for each value of N in NVAL */ n = nval[in]; lda = max(1,n); *(unsigned char *)xtype = 'N'; for (imat = 1; imat <= 10; ++imat) { /* Do the tests only if DOTYPE( IMAT ) is true. */ if (! dotype[imat]) { goto L80; } for (iuplo = 1; iuplo <= 2; ++iuplo) { /* Do first for UPLO = 'U', then for UPLO = 'L' */ *(unsigned char *)uplo = *(unsigned char *)&uplos[iuplo - 1]; /* Call ZLATTR to generate a triangular test matrix. */ s_copy(srnamc_1.srnamt, "ZLATTR", (ftnlen)32, (ftnlen)6); zlattr_(&imat, uplo, "No transpose", diag, iseed, &n, &a[1], & lda, &x[1], &work[1], &rwork[1], &info); /* Set IDIAG = 1 for non-unit matrices, 2 for unit. */ if (lsame_(diag, "N")) { idiag = 1; } else { idiag = 2; } i__2 = *nnb; for (inb = 1; inb <= i__2; ++inb) { /* Do for each blocksize in NBVAL */ nb = nbval[inb]; xlaenv_(&c__1, &nb); /* + TEST 1 */ /* Form the inverse of A. */ zlacpy_(uplo, &n, &n, &a[1], &lda, &ainv[1], &lda); s_copy(srnamc_1.srnamt, "ZTRTRI", (ftnlen)32, (ftnlen)6); ztrtri_(uplo, diag, &n, &ainv[1], &lda, &info); /* Check error code from ZTRTRI. */ if (info != 0) { /* Writing concatenation */ i__3[0] = 1, a__1[0] = uplo; i__3[1] = 1, a__1[1] = diag; s_cat(ch__1, a__1, i__3, &c__2, (ftnlen)2); alaerh_(path, "ZTRTRI", &info, &c__0, ch__1, &n, &n, & c_n1, &c_n1, &nb, &imat, &nfail, &nerrs, nout); } /* Compute the infinity-norm condition number of A. */ anorm = zlantr_("I", uplo, diag, &n, &n, &a[1], &lda, & rwork[1]); ainvnm = zlantr_("I", uplo, diag, &n, &n, &ainv[1], &lda, &rwork[1]); if (anorm <= 0. || ainvnm <= 0.) { rcondi = 1.; } else { rcondi = 1. / anorm / ainvnm; } /* Compute the residual for the triangular matrix times */ /* its inverse. Also compute the 1-norm condition number */ /* of A. */ ztrt01_(uplo, diag, &n, &a[1], &lda, &ainv[1], &lda, & rcondo, &rwork[1], result); /* Print the test ratio if it is .GE. THRESH. */ if (result[0] >= *thresh) { if (nfail == 0 && nerrs == 0) { alahd_(nout, path); } io___27.ciunit = *nout; s_wsfe(&io___27); do_fio(&c__1, uplo, (ftnlen)1); do_fio(&c__1, diag, (ftnlen)1); do_fio(&c__1, (char *)&n, (ftnlen)sizeof(integer)); do_fio(&c__1, (char *)&nb, (ftnlen)sizeof(integer)); do_fio(&c__1, (char *)&imat, (ftnlen)sizeof(integer)); do_fio(&c__1, (char *)&c__1, (ftnlen)sizeof(integer)); do_fio(&c__1, (char *)&result[0], (ftnlen)sizeof( doublereal)); e_wsfe(); ++nfail; } ++nrun; /* Skip remaining tests if not the first block size. */ if (inb != 1) { goto L60; } i__4 = *nns; for (irhs = 1; irhs <= i__4; ++irhs) { nrhs = nsval[irhs]; *(unsigned char *)xtype = 'N'; for (itran = 1; itran <= 3; ++itran) { /* Do for op(A) = A, A**T, or A**H. */ *(unsigned char *)trans = *(unsigned char *)& transs[itran - 1]; if (itran == 1) { *(unsigned char *)norm = 'O'; rcondc = rcondo; } else { *(unsigned char *)norm = 'I'; rcondc = rcondi; } /* + TEST 2 */ /* Solve and compute residual for op(A)*x = b. */ s_copy(srnamc_1.srnamt, "ZLARHS", (ftnlen)32, ( ftnlen)6); zlarhs_(path, xtype, uplo, trans, &n, &n, &c__0, & idiag, &nrhs, &a[1], &lda, &xact[1], &lda, &b[1], &lda, iseed, &info); *(unsigned char *)xtype = 'C'; zlacpy_("Full", &n, &nrhs, &b[1], &lda, &x[1], & lda); s_copy(srnamc_1.srnamt, "ZTRTRS", (ftnlen)32, ( ftnlen)6); ztrtrs_(uplo, trans, diag, &n, &nrhs, &a[1], &lda, &x[1], &lda, &info); /* Check error code from ZTRTRS. */ if (info != 0) { /* Writing concatenation */ i__5[0] = 1, a__2[0] = uplo; i__5[1] = 1, a__2[1] = trans; i__5[2] = 1, a__2[2] = diag; s_cat(ch__2, a__2, i__5, &c__3, (ftnlen)3); alaerh_(path, "ZTRTRS", &info, &c__0, ch__2, & n, &n, &c_n1, &c_n1, &nrhs, &imat, & nfail, &nerrs, nout); } /* This line is needed on a Sun SPARCstation. */ if (n > 0) { dummy = a[1].r; } ztrt02_(uplo, trans, diag, &n, &nrhs, &a[1], &lda, &x[1], &lda, &b[1], &lda, &work[1], & rwork[1], &result[1]); /* + TEST 3 */ /* Check solution from generated exact solution. */ zget04_(&n, &nrhs, &x[1], &lda, &xact[1], &lda, & rcondc, &result[2]); /* + TESTS 4, 5, and 6 */ /* Use iterative refinement to improve the solution */ /* and compute error bounds. */ s_copy(srnamc_1.srnamt, "ZTRRFS", (ftnlen)32, ( ftnlen)6); ztrrfs_(uplo, trans, diag, &n, &nrhs, &a[1], &lda, &b[1], &lda, &x[1], &lda, &rwork[1], & rwork[nrhs + 1], &work[1], &rwork[(nrhs << 1) + 1], &info); /* Check error code from ZTRRFS. */ if (info != 0) { /* Writing concatenation */ i__5[0] = 1, a__2[0] = uplo; i__5[1] = 1, a__2[1] = trans; i__5[2] = 1, a__2[2] = diag; s_cat(ch__2, a__2, i__5, &c__3, (ftnlen)3); alaerh_(path, "ZTRRFS", &info, &c__0, ch__2, & n, &n, &c_n1, &c_n1, &nrhs, &imat, & nfail, &nerrs, nout); } zget04_(&n, &nrhs, &x[1], &lda, &xact[1], &lda, & rcondc, &result[3]); ztrt05_(uplo, trans, diag, &n, &nrhs, &a[1], &lda, &b[1], &lda, &x[1], &lda, &xact[1], &lda, &rwork[1], &rwork[nrhs + 1], &result[4]); /* Print information about the tests that did not */ /* pass the threshold. */ for (k = 2; k <= 6; ++k) { if (result[k - 1] >= *thresh) { if (nfail == 0 && nerrs == 0) { alahd_(nout, path); } io___36.ciunit = *nout; s_wsfe(&io___36); do_fio(&c__1, uplo, (ftnlen)1); do_fio(&c__1, trans, (ftnlen)1); do_fio(&c__1, diag, (ftnlen)1); do_fio(&c__1, (char *)&n, (ftnlen)sizeof( integer)); do_fio(&c__1, (char *)&nrhs, (ftnlen) sizeof(integer)); do_fio(&c__1, (char *)&imat, (ftnlen) sizeof(integer)); do_fio(&c__1, (char *)&k, (ftnlen)sizeof( integer)); do_fio(&c__1, (char *)&result[k - 1], ( ftnlen)sizeof(doublereal)); e_wsfe(); ++nfail; } /* L20: */ } nrun += 5; /* L30: */ } /* L40: */ } /* + TEST 7 */ /* Get an estimate of RCOND = 1/CNDNUM. */ for (itran = 1; itran <= 2; ++itran) { if (itran == 1) { *(unsigned char *)norm = 'O'; rcondc = rcondo; } else { *(unsigned char *)norm = 'I'; rcondc = rcondi; } s_copy(srnamc_1.srnamt, "ZTRCON", (ftnlen)32, (ftnlen) 6); ztrcon_(norm, uplo, diag, &n, &a[1], &lda, &rcond, & work[1], &rwork[1], &info); /* Check error code from ZTRCON. */ if (info != 0) { /* Writing concatenation */ i__5[0] = 1, a__2[0] = norm; i__5[1] = 1, a__2[1] = uplo; i__5[2] = 1, a__2[2] = diag; s_cat(ch__2, a__2, i__5, &c__3, (ftnlen)3); alaerh_(path, "ZTRCON", &info, &c__0, ch__2, &n, & n, &c_n1, &c_n1, &c_n1, &imat, &nfail, & nerrs, nout); } ztrt06_(&rcond, &rcondc, uplo, diag, &n, &a[1], &lda, &rwork[1], &result[6]); /* Print the test ratio if it is .GE. THRESH. */ if (result[6] >= *thresh) { if (nfail == 0 && nerrs == 0) { alahd_(nout, path); } io___38.ciunit = *nout; s_wsfe(&io___38); do_fio(&c__1, norm, (ftnlen)1); do_fio(&c__1, uplo, (ftnlen)1); do_fio(&c__1, (char *)&n, (ftnlen)sizeof(integer)) ; do_fio(&c__1, (char *)&imat, (ftnlen)sizeof( integer)); do_fio(&c__1, (char *)&c__7, (ftnlen)sizeof( integer)); do_fio(&c__1, (char *)&result[6], (ftnlen)sizeof( doublereal)); e_wsfe(); ++nfail; } ++nrun; /* L50: */ } L60: ; } /* L70: */ } L80: ; } /* Use pathological test matrices to test ZLATRS. */ for (imat = 11; imat <= 18; ++imat) { /* Do the tests only if DOTYPE( IMAT ) is true. */ if (! dotype[imat]) { goto L110; } for (iuplo = 1; iuplo <= 2; ++iuplo) { /* Do first for UPLO = 'U', then for UPLO = 'L' */ *(unsigned char *)uplo = *(unsigned char *)&uplos[iuplo - 1]; for (itran = 1; itran <= 3; ++itran) { /* Do for op(A) = A, A**T, and A**H. */ *(unsigned char *)trans = *(unsigned char *)&transs[itran - 1]; /* Call ZLATTR to generate a triangular test matrix. */ s_copy(srnamc_1.srnamt, "ZLATTR", (ftnlen)32, (ftnlen)6); zlattr_(&imat, uplo, trans, diag, iseed, &n, &a[1], &lda, &x[1], &work[1], &rwork[1], &info); /* + TEST 8 */ /* Solve the system op(A)*x = b. */ s_copy(srnamc_1.srnamt, "ZLATRS", (ftnlen)32, (ftnlen)6); zcopy_(&n, &x[1], &c__1, &b[1], &c__1); zlatrs_(uplo, trans, diag, "N", &n, &a[1], &lda, &b[1], & scale, &rwork[1], &info); /* Check error code from ZLATRS. */ if (info != 0) { /* Writing concatenation */ i__6[0] = 1, a__3[0] = uplo; i__6[1] = 1, a__3[1] = trans; i__6[2] = 1, a__3[2] = diag; i__6[3] = 1, a__3[3] = "N"; s_cat(ch__3, a__3, i__6, &c__4, (ftnlen)4); alaerh_(path, "ZLATRS", &info, &c__0, ch__3, &n, &n, & c_n1, &c_n1, &c_n1, &imat, &nfail, &nerrs, nout); } ztrt03_(uplo, trans, diag, &n, &c__1, &a[1], &lda, &scale, &rwork[1], &c_b99, &b[1], &lda, &x[1], &lda, & work[1], &result[7]); /* + TEST 9 */ /* Solve op(A)*X = b again with NORMIN = 'Y'. */ zcopy_(&n, &x[1], &c__1, &b[n + 1], &c__1); zlatrs_(uplo, trans, diag, "Y", &n, &a[1], &lda, &b[n + 1] , &scale, &rwork[1], &info); /* Check error code from ZLATRS. */ if (info != 0) { /* Writing concatenation */ i__6[0] = 1, a__3[0] = uplo; i__6[1] = 1, a__3[1] = trans; i__6[2] = 1, a__3[2] = diag; i__6[3] = 1, a__3[3] = "Y"; s_cat(ch__3, a__3, i__6, &c__4, (ftnlen)4); alaerh_(path, "ZLATRS", &info, &c__0, ch__3, &n, &n, & c_n1, &c_n1, &c_n1, &imat, &nfail, &nerrs, nout); } ztrt03_(uplo, trans, diag, &n, &c__1, &a[1], &lda, &scale, &rwork[1], &c_b99, &b[n + 1], &lda, &x[1], &lda, &work[1], &result[8]); /* Print information about the tests that did not pass */ /* the threshold. */ if (result[7] >= *thresh) { if (nfail == 0 && nerrs == 0) { alahd_(nout, path); } io___40.ciunit = *nout; s_wsfe(&io___40); do_fio(&c__1, "ZLATRS", (ftnlen)6); do_fio(&c__1, uplo, (ftnlen)1); do_fio(&c__1, trans, (ftnlen)1); do_fio(&c__1, diag, (ftnlen)1); do_fio(&c__1, "N", (ftnlen)1); do_fio(&c__1, (char *)&n, (ftnlen)sizeof(integer)); do_fio(&c__1, (char *)&imat, (ftnlen)sizeof(integer)); do_fio(&c__1, (char *)&c__8, (ftnlen)sizeof(integer)); do_fio(&c__1, (char *)&result[7], (ftnlen)sizeof( doublereal)); e_wsfe(); ++nfail; } if (result[8] >= *thresh) { if (nfail == 0 && nerrs == 0) { alahd_(nout, path); } io___41.ciunit = *nout; s_wsfe(&io___41); do_fio(&c__1, "ZLATRS", (ftnlen)6); do_fio(&c__1, uplo, (ftnlen)1); do_fio(&c__1, trans, (ftnlen)1); do_fio(&c__1, diag, (ftnlen)1); do_fio(&c__1, "Y", (ftnlen)1); do_fio(&c__1, (char *)&n, (ftnlen)sizeof(integer)); do_fio(&c__1, (char *)&imat, (ftnlen)sizeof(integer)); do_fio(&c__1, (char *)&c__9, (ftnlen)sizeof(integer)); do_fio(&c__1, (char *)&result[8], (ftnlen)sizeof( doublereal)); e_wsfe(); ++nfail; } nrun += 2; /* L90: */ } /* L100: */ } L110: ; } /* L120: */ } /* Print a summary of the results. */ alasum_(path, nout, &nfail, &nrun, &nerrs); return 0; /* End of ZCHKTR */ } /* zchktr_ */
/* Subroutine */ int zgetri_(integer *n, doublecomplex *a, integer *lda, integer *ipiv, doublecomplex *work, integer *lwork, integer *info) { /* System generated locals */ integer a_dim1, a_offset, i__1, i__2, i__3, i__4, i__5; doublecomplex z__1; /* Local variables */ static integer i__, j, jb, nb, jj, jp, nn, iws, nbmin; extern /* Subroutine */ int zgemm_(char *, char *, integer *, integer *, integer *, doublecomplex *, doublecomplex *, integer *, doublecomplex *, integer *, doublecomplex *, doublecomplex *, integer *, ftnlen, ftnlen), zgemv_(char *, integer *, integer *, doublecomplex *, doublecomplex *, integer *, doublecomplex *, integer *, doublecomplex *, doublecomplex *, integer *, ftnlen), zswap_(integer *, doublecomplex *, integer *, doublecomplex *, integer *), ztrsm_(char *, char *, char *, char *, integer *, integer *, doublecomplex *, doublecomplex *, integer *, doublecomplex *, integer *, ftnlen, ftnlen, ftnlen, ftnlen), xerbla_(char *, integer *, ftnlen); extern integer ilaenv_(integer *, char *, char *, integer *, integer *, integer *, integer *, ftnlen, ftnlen); static integer ldwork, lwkopt; static logical lquery; extern /* Subroutine */ int ztrtri_(char *, char *, integer *, doublecomplex *, integer *, integer *, ftnlen, ftnlen); /* -- LAPACK routine (version 3.0) -- */ /* Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd., */ /* Courant Institute, Argonne National Lab, and Rice University */ /* June 30, 1999 */ /* .. Scalar Arguments .. */ /* .. */ /* .. Array Arguments .. */ /* .. */ /* Purpose */ /* ======= */ /* ZGETRI computes the inverse of a matrix using the LU factorization */ /* computed by ZGETRF. */ /* This method inverts U and then computes inv(A) by solving the system */ /* inv(A)*L = inv(U) for inv(A). */ /* Arguments */ /* ========= */ /* N (input) INTEGER */ /* The order of the matrix A. N >= 0. */ /* A (input/output) COMPLEX*16 array, dimension (LDA,N) */ /* On entry, the factors L and U from the factorization */ /* A = P*L*U as computed by ZGETRF. */ /* On exit, if INFO = 0, the inverse of the original matrix A. */ /* LDA (input) INTEGER */ /* The leading dimension of the array A. LDA >= max(1,N). */ /* IPIV (input) INTEGER array, dimension (N) */ /* The pivot indices from ZGETRF; for 1<=i<=N, row i of the */ /* matrix was interchanged with row IPIV(i). */ /* WORK (workspace/output) COMPLEX*16 array, dimension (LWORK) */ /* On exit, if INFO=0, then WORK(1) returns the optimal LWORK. */ /* LWORK (input) INTEGER */ /* The dimension of the array WORK. LWORK >= max(1,N). */ /* For optimal performance LWORK >= N*NB, where NB is */ /* the optimal blocksize returned by ILAENV. */ /* If LWORK = -1, then a workspace query is assumed; the routine */ /* only calculates the optimal size of the WORK array, returns */ /* this value as the first entry of the WORK array, and no error */ /* message related to LWORK is issued by XERBLA. */ /* INFO (output) INTEGER */ /* = 0: successful exit */ /* < 0: if INFO = -i, the i-th argument had an illegal value */ /* > 0: if INFO = i, U(i,i) is exactly zero; the matrix is */ /* singular and its inverse could not be computed. */ /* ===================================================================== */ /* .. Parameters .. */ /* .. */ /* .. Local Scalars .. */ /* .. */ /* .. External Functions .. */ /* .. */ /* .. External Subroutines .. */ /* .. */ /* .. Intrinsic Functions .. */ /* .. */ /* .. Executable Statements .. */ /* Test the input parameters. */ /* Parameter adjustments */ a_dim1 = *lda; a_offset = 1 + a_dim1; a -= a_offset; --ipiv; --work; /* Function Body */ *info = 0; nb = ilaenv_(&c__1, "ZGETRI", " ", n, &c_n1, &c_n1, &c_n1, (ftnlen)6, ( ftnlen)1); lwkopt = *n * nb; work[1].r = (doublereal) lwkopt, work[1].i = 0.; lquery = *lwork == -1; if (*n < 0) { *info = -1; } else if (*lda < max(1,*n)) { *info = -3; } else if (*lwork < max(1,*n) && ! lquery) { *info = -6; } if (*info != 0) { i__1 = -(*info); xerbla_("ZGETRI", &i__1, (ftnlen)6); return 0; } else if (lquery) { return 0; } /* Quick return if possible */ if (*n == 0) { return 0; } /* Form inv(U). If INFO > 0 from ZTRTRI, then U is singular, */ /* and the inverse is not computed. */ ztrtri_("Upper", "Non-unit", n, &a[a_offset], lda, info, (ftnlen)5, ( ftnlen)8); if (*info > 0) { return 0; } nbmin = 2; ldwork = *n; if (nb > 1 && nb < *n) { /* Computing MAX */ i__1 = ldwork * nb; iws = max(i__1,1); if (*lwork < iws) { nb = *lwork / ldwork; /* Computing MAX */ i__1 = 2, i__2 = ilaenv_(&c__2, "ZGETRI", " ", n, &c_n1, &c_n1, & c_n1, (ftnlen)6, (ftnlen)1); nbmin = max(i__1,i__2); } } else { iws = *n; } /* Solve the equation inv(A)*L = inv(U) for inv(A). */ if (nb < nbmin || nb >= *n) { /* Use unblocked code. */ for (j = *n; j >= 1; --j) { /* Copy current column of L to WORK and replace with zeros. */ i__1 = *n; for (i__ = j + 1; i__ <= i__1; ++i__) { i__2 = i__; i__3 = i__ + j * a_dim1; work[i__2].r = a[i__3].r, work[i__2].i = a[i__3].i; i__2 = i__ + j * a_dim1; a[i__2].r = 0., a[i__2].i = 0.; /* L10: */ } /* Compute current column of inv(A). */ if (j < *n) { i__1 = *n - j; z__1.r = -1., z__1.i = -0.; zgemv_("No transpose", n, &i__1, &z__1, &a[(j + 1) * a_dim1 + 1], lda, &work[j + 1], &c__1, &c_b2, &a[j * a_dim1 + 1], &c__1, (ftnlen)12); } /* L20: */ } } else { /* Use blocked code. */ nn = (*n - 1) / nb * nb + 1; i__1 = -nb; for (j = nn; i__1 < 0 ? j >= 1 : j <= 1; j += i__1) { /* Computing MIN */ i__2 = nb, i__3 = *n - j + 1; jb = min(i__2,i__3); /* Copy current block column of L to WORK and replace with */ /* zeros. */ i__2 = j + jb - 1; for (jj = j; jj <= i__2; ++jj) { i__3 = *n; for (i__ = jj + 1; i__ <= i__3; ++i__) { i__4 = i__ + (jj - j) * ldwork; i__5 = i__ + jj * a_dim1; work[i__4].r = a[i__5].r, work[i__4].i = a[i__5].i; i__4 = i__ + jj * a_dim1; a[i__4].r = 0., a[i__4].i = 0.; /* L30: */ } /* L40: */ } /* Compute current block column of inv(A). */ if (j + jb <= *n) { i__2 = *n - j - jb + 1; z__1.r = -1., z__1.i = -0.; zgemm_("No transpose", "No transpose", n, &jb, &i__2, &z__1, & a[(j + jb) * a_dim1 + 1], lda, &work[j + jb], &ldwork, &c_b2, &a[j * a_dim1 + 1], lda, (ftnlen)12, (ftnlen) 12); } ztrsm_("Right", "Lower", "No transpose", "Unit", n, &jb, &c_b2, & work[j], &ldwork, &a[j * a_dim1 + 1], lda, (ftnlen)5, ( ftnlen)5, (ftnlen)12, (ftnlen)4); /* L50: */ } } /* Apply column interchanges. */ for (j = *n - 1; j >= 1; --j) { jp = ipiv[j]; if (jp != j) { zswap_(n, &a[j * a_dim1 + 1], &c__1, &a[jp * a_dim1 + 1], &c__1); } /* L60: */ } work[1].r = (doublereal) iws, work[1].i = 0.; return 0; /* End of ZGETRI */ } /* zgetri_ */