ddrvrfp.c

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/* ddrvrfp.f -- translated by f2c (version 20061008).
   You must link the resulting object file with libf2c:
        on Microsoft Windows system, link with libf2c.lib;
        on Linux or Unix systems, link with .../path/to/libf2c.a -lm
        or, if you install libf2c.a in a standard place, with -lf2c -lm
        -- in that order, at the end of the command line, as in
                cc *.o -lf2c -lm
        Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,

                http://www.netlib.org/f2c/libf2c.zip
*/

#include "f2c.h"
#include "blaswrap.h"

/* Common Block Declarations */

struct {
    char srnamt[32];
} srnamc_;

#define srnamc_1 srnamc_

/* Table of constant values */

static integer c__0 = 0;
static integer c_n1 = -1;
static integer c__1 = 1;

/* Subroutine */ int ddrvrfp_(integer *nout, integer *nn, integer *nval, 
        integer *nns, integer *nsval, integer *nnt, integer *ntval, 
        doublereal *thresh, doublereal *a, doublereal *asav, doublereal *afac, 
         doublereal *ainv, doublereal *b, doublereal *bsav, doublereal *xact, 
        doublereal *x, doublereal *arf, doublereal *arfinv, doublereal *
        d_work_dlatms__, doublereal *d_work_dpot01__, doublereal *
        d_temp_dpot02__, doublereal *d_temp_dpot03__, doublereal *
        d_work_dlansy__, doublereal *d_work_dpot02__, doublereal *
        d_work_dpot03__)
{
    /* Initialized data */

    static integer iseedy[4] = { 1988,1989,1990,1991 };
    static char uplos[1*2] = "U" "L";
    static char forms[1*2] = "N" "T";

    /* Format strings */
    static char fmt_9999[] = "(1x,a6,\002, UPLO='\002,a1,\002', N =\002,i5"
            ",\002, type \002,i1,\002, test(\002,i1,\002)=\002,g12.5)";

    /* System generated locals */
    integer i__1, i__2, i__3, i__4, i__5, i__6, i__7;

    /* Builtin functions */
    /* Subroutine */ int s_copy(char *, char *, ftnlen, ftnlen);
    integer s_wsfe(cilist *), do_fio(integer *, char *, ftnlen), e_wsfe(void);

    /* Local variables */
    integer i__, k, n, kl, ku, nt, lda, ldb, iin, iis, iit, ioff, mode, info, 
            imat;
    char dist[1];
    integer nrhs;
    char uplo[1];
    integer nrun;
    extern /* Subroutine */ int dget04_(integer *, integer *, doublereal *, 
            integer *, doublereal *, integer *, doublereal *, doublereal *);
    integer nfail, iseed[4];
    char cform[1];
    extern /* Subroutine */ int dpot01_(char *, integer *, doublereal *, 
            integer *, doublereal *, integer *, doublereal *, doublereal *), dpot02_(char *, integer *, integer *, doublereal *, 
            integer *, doublereal *, integer *, doublereal *, integer *, 
            doublereal *, doublereal *), dpot03_(char *, integer *, 
            doublereal *, integer *, doublereal *, integer *, doublereal *, 
            integer *, doublereal *, doublereal *, doublereal *);
    integer iform;
    doublereal anorm;
    char ctype[1];
    integer iuplo, nerrs, izero;
    logical zerot;
    extern /* Subroutine */ int dlatb4_(char *, integer *, integer *, integer 
            *, char *, integer *, integer *, doublereal *, integer *, 
            doublereal *, char *), aladhd_(integer *, 
            char *), alaerh_(char *, char *, integer *, integer *, 
            char *, integer *, integer *, integer *, integer *, integer *, 
            integer *, integer *, integer *, integer *);
    doublereal rcondc;
    extern /* Subroutine */ int dlacpy_(char *, integer *, integer *, 
            doublereal *, integer *, doublereal *, integer *), 
            dlarhs_(char *, char *, char *, char *, integer *, integer *, 
            integer *, integer *, integer *, doublereal *, integer *, 
            doublereal *, integer *, doublereal *, integer *, integer *, 
            integer *), alasvm_(char *, 
            integer *, integer *, integer *, integer *);
    doublereal cndnum;
    extern /* Subroutine */ int dlatms_(integer *, integer *, char *, integer 
            *, char *, doublereal *, integer *, doublereal *, doublereal *, 
            integer *, integer *, char *, doublereal *, integer *, doublereal 
            *, integer *), dpftrf_(char *, char *, 
            integer *, doublereal *, integer *);
    doublereal ainvnm;
    extern /* Subroutine */ int dpftri_(char *, char *, integer *, doublereal 
            *, integer *);
    extern doublereal dlansy_(char *, char *, integer *, doublereal *, 
            integer *, doublereal *);
    extern /* Subroutine */ int dpotrf_(char *, integer *, doublereal *, 
            integer *, integer *), dpotri_(char *, integer *, 
            doublereal *, integer *, integer *), dpftrs_(char *, char 
            *, integer *, integer *, doublereal *, doublereal *, integer *, 
            integer *), dtfttr_(char *, char *, integer *, 
            doublereal *, doublereal *, integer *, integer *),
             dtrttf_(char *, char *, integer *, doublereal *, integer *, 
            doublereal *, integer *);
    doublereal result[4];

    /* Fortran I/O blocks */
    static cilist io___37 = { 0, 0, 0, fmt_9999, 0 };



/*  -- LAPACK test routine (version 3.2.0) -- */
/*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
/*     November 2008 */

/*     .. Scalar Arguments .. */
/*     .. */
/*     .. Array Arguments .. */
/*     .. */

/*  Purpose */
/*  ======= */

/*  DDRVRFP tests the LAPACK RFP routines: */
/*      DPFTRF, DPFTRS, and DPFTRI. */

/*  This testing routine follow the same tests as DDRVPO (test for the full */
/*  format Symmetric Positive Definite solver). */

/*  The tests are performed in Full Format, convertion back and forth from */
/*  full format to RFP format are performed using the routines DTRTTF and */
/*  DTFTTR. */

/*  First, a specific matrix A of size N is created. There is nine types of */
/*  different matrixes possible. */
/*   1. Diagonal                        6. Random, CNDNUM = sqrt(0.1/EPS) */
/*   2. Random, CNDNUM = 2              7. Random, CNDNUM = 0.1/EPS */
/*  *3. First row and column zero       8. Scaled near underflow */
/*  *4. Last row and column zero        9. Scaled near overflow */
/*  *5. Middle row and column zero */
/*  (* - tests error exits from DPFTRF, no test ratios are computed) */
/*  A solution XACT of size N-by-NRHS is created and the associated right */
/*  hand side B as well. Then DPFTRF is called to compute L (or U), the */
/*  Cholesky factor of A. Then L (or U) is used to solve the linear system */
/*  of equations AX = B. This gives X. Then L (or U) is used to compute the */
/*  inverse of A, AINV. The following four tests are then performed: */
/*  (1) norm( L*L' - A ) / ( N * norm(A) * EPS ) or */
/*      norm( U'*U - A ) / ( N * norm(A) * EPS ), */
/*  (2) norm(B - A*X) / ( norm(A) * norm(X) * EPS ), */
/*  (3) norm( I - A*AINV ) / ( N * norm(A) * norm(AINV) * EPS ), */
/*  (4) ( norm(X-XACT) * RCOND ) / ( norm(XACT) * EPS ), */
/*  where EPS is the machine precision, RCOND the condition number of A, and */
/*  norm( . ) the 1-norm for (1,2,3) and the inf-norm for (4). */
/*  Errors occur when INFO parameter is not as expected. Failures occur when */
/*  a test ratios is greater than THRES. */

/*  Arguments */
/*  ========= */

/*  NOUT          (input) INTEGER */
/*                The unit number for output. */

/*  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 dimension N. */

/*  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. */

/*  NNT           (input) INTEGER */
/*                The number of values of MATRIX TYPE contained in the vector NTVAL. */

/*  NTVAL         (input) INTEGER array, dimension (NNT) */
/*                The values of matrix type (between 0 and 9 for PO/PP/PF matrices). */

/*  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. */

/*  A             (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX) */

/*  ASAV          (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX) */

/*  AFAC          (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX) */

/*  AINV          (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX) */

/*  B             (workspace) DOUBLE PRECISION array, dimension (NMAX*MAXRHS) */

/*  BSAV          (workspace) DOUBLE PRECISION array, dimension (NMAX*MAXRHS) */

/*  XACT          (workspace) DOUBLE PRECISION array, dimension (NMAX*MAXRHS) */

/*  X             (workspace) DOUBLE PRECISION array, dimension (NMAX*MAXRHS) */

/*  ARF           (workspace) DOUBLE PRECISION array, dimension ((NMAX*(NMAX+1))/2) */

/*  ARFINV        (workspace) DOUBLE PRECISION array, dimension ((NMAX*(NMAX+1))/2) */

/*  D_WORK_DLATMS (workspace) DOUBLE PRECISION array, dimension ( 3*NMAX ) */

/*  D_WORK_DPOT01 (workspace) DOUBLE PRECISION array, dimension ( NMAX ) */

/*  D_TEMP_DPOT02 (workspace) DOUBLE PRECISION array, dimension ( NMAX*MAXRHS ) */

/*  D_TEMP_DPOT03 (workspace) DOUBLE PRECISION array, dimension ( NMAX*NMAX ) */

/*  D_WORK_DLATMS (workspace) DOUBLE PRECISION array, dimension ( NMAX ) */

/*  D_WORK_DLANSY (workspace) DOUBLE PRECISION array, dimension ( NMAX ) */

/*  D_WORK_DPOT02 (workspace) DOUBLE PRECISION array, dimension ( NMAX ) */

/*  D_WORK_DPOT03 (workspace) DOUBLE PRECISION array, dimension ( NMAX ) */

/*  ===================================================================== */

/*     .. Parameters .. */
/*     .. */
/*     .. Local Scalars .. */
/*     .. */
/*     .. Local Arrays .. */
/*     .. */
/*     .. External Functions .. */
/*     .. */
/*     .. External Subroutines .. */
/*     .. */
/*     .. Scalars in Common .. */
/*     .. */
/*     .. Common blocks .. */
/*     .. */
/*     .. Data statements .. */
    /* Parameter adjustments */
    --nval;
    --nsval;
    --ntval;
    --a;
    --asav;
    --afac;
    --ainv;
    --b;
    --bsav;
    --xact;
    --x;
    --arf;
    --arfinv;
    --d_work_dlatms__;
    --d_work_dpot01__;
    --d_temp_dpot02__;
    --d_temp_dpot03__;
    --d_work_dlansy__;
    --d_work_dpot02__;
    --d_work_dpot03__;

    /* Function Body */
/*     .. */
/*     .. Executable Statements .. */

/*     Initialize constants and the random number seed. */

    nrun = 0;
    nfail = 0;
    nerrs = 0;
    for (i__ = 1; i__ <= 4; ++i__) {
        iseed[i__ - 1] = iseedy[i__ - 1];
/* L10: */
    }

    i__1 = *nn;
    for (iin = 1; iin <= i__1; ++iin) {

        n = nval[iin];
        lda = max(n,1);
        ldb = max(n,1);

        i__2 = *nns;
        for (iis = 1; iis <= i__2; ++iis) {

            nrhs = nsval[iis];

            i__3 = *nnt;
            for (iit = 1; iit <= i__3; ++iit) {

                imat = ntval[iit];

/*              If N.EQ.0, only consider the first type */

                if (n == 0 && iit > 1) {
                    goto L120;
                }

/*              Skip types 3, 4, or 5 if the matrix size is too small. */

                if (imat == 4 && n <= 1) {
                    goto L120;
                }
                if (imat == 5 && n <= 2) {
                    goto L120;
                }

/*              Do first for UPLO = 'U', then for UPLO = 'L' */

                for (iuplo = 1; iuplo <= 2; ++iuplo) {
                    *(unsigned char *)uplo = *(unsigned char *)&uplos[iuplo - 
                            1];

/*                 Do first for CFORM = 'N', then for CFORM = 'C' */

                    for (iform = 1; iform <= 2; ++iform) {
                        *(unsigned char *)cform = *(unsigned char *)&forms[
                                iform - 1];

/*                    Set up parameters with DLATB4 and generate a test */
/*                    matrix with DLATMS. */

                        dlatb4_("DPO", &imat, &n, &n, ctype, &kl, &ku, &anorm, 
                                 &mode, &cndnum, dist);

                        s_copy(srnamc_1.srnamt, "DLATMS", (ftnlen)32, (ftnlen)
                                6);
                        dlatms_(&n, &n, dist, iseed, ctype, &d_work_dlatms__[
                                1], &mode, &cndnum, &anorm, &kl, &ku, uplo, &
                                a[1], &lda, &d_work_dlatms__[1], &info);

/*                    Check error code from DLATMS. */

                        if (info != 0) {
                            alaerh_("DPF", "DLATMS", &info, &c__0, uplo, &n, &
                                    n, &c_n1, &c_n1, &c_n1, &iit, &nfail, &
                                    nerrs, nout);
                            goto L100;
                        }

/*                    For types 3-5, zero one row and column of the matrix to */
/*                    test that INFO is returned correctly. */

                        zerot = imat >= 3 && imat <= 5;
                        if (zerot) {
                            if (iit == 3) {
                                izero = 1;
                            } else if (iit == 4) {
                                izero = n;
                            } else {
                                izero = n / 2 + 1;
                            }
                            ioff = (izero - 1) * lda;

/*                       Set row and column IZERO of A to 0. */

                            if (iuplo == 1) {
                                i__4 = izero - 1;
                                for (i__ = 1; i__ <= i__4; ++i__) {
                                    a[ioff + i__] = 0.;
/* L20: */
                                }
                                ioff += izero;
                                i__4 = n;
                                for (i__ = izero; i__ <= i__4; ++i__) {
                                    a[ioff] = 0.;
                                    ioff += lda;
/* L30: */
                                }
                            } else {
                                ioff = izero;
                                i__4 = izero - 1;
                                for (i__ = 1; i__ <= i__4; ++i__) {
                                    a[ioff] = 0.;
                                    ioff += lda;
/* L40: */
                                }
                                ioff -= izero;
                                i__4 = n;
                                for (i__ = izero; i__ <= i__4; ++i__) {
                                    a[ioff + i__] = 0.;
/* L50: */
                                }
                            }
                        } else {
                            izero = 0;
                        }

/*                    Save a copy of the matrix A in ASAV. */

                        dlacpy_(uplo, &n, &n, &a[1], &lda, &asav[1], &lda);

/*                    Compute the condition number of A (RCONDC). */

                        if (zerot) {
                            rcondc = 0.;
                        } else {

/*                       Compute the 1-norm of A. */

                            anorm = dlansy_("1", uplo, &n, &a[1], &lda, &
                                    d_work_dlansy__[1]);

/*                       Factor the matrix A. */

                            dpotrf_(uplo, &n, &a[1], &lda, &info);

/*                       Form the inverse of A. */

                            dpotri_(uplo, &n, &a[1], &lda, &info);

/*                       Compute the 1-norm condition number of A. */

                            ainvnm = dlansy_("1", uplo, &n, &a[1], &lda, &
                                    d_work_dlansy__[1]);
                            rcondc = 1. / anorm / ainvnm;

/*                       Restore the matrix A. */

                            dlacpy_(uplo, &n, &n, &asav[1], &lda, &a[1], &lda);

                        }

/*                    Form an exact solution and set the right hand side. */

                        s_copy(srnamc_1.srnamt, "DLARHS", (ftnlen)32, (ftnlen)
                                6);
                        dlarhs_("DPO", "N", uplo, " ", &n, &n, &kl, &ku, &
                                nrhs, &a[1], &lda, &xact[1], &lda, &b[1], &
                                lda, iseed, &info);
                        dlacpy_("Full", &n, &nrhs, &b[1], &lda, &bsav[1], &
                                lda);

/*                    Compute the L*L' or U'*U factorization of the */
/*                    matrix and solve the system. */

                        dlacpy_(uplo, &n, &n, &a[1], &lda, &afac[1], &lda);
                        dlacpy_("Full", &n, &nrhs, &b[1], &ldb, &x[1], &ldb);

                        s_copy(srnamc_1.srnamt, "DTRTTF", (ftnlen)32, (ftnlen)
                                6);
                        dtrttf_(cform, uplo, &n, &afac[1], &lda, &arf[1], &
                                info);
                        s_copy(srnamc_1.srnamt, "DPFTRF", (ftnlen)32, (ftnlen)
                                6);
                        dpftrf_(cform, uplo, &n, &arf[1], &info);

/*                    Check error code from DPFTRF. */

                        if (info != izero) {

/*                       LANGOU: there is a small hick here: IZERO should */
/*                       always be INFO however if INFO is ZERO, ALAERH does not */
/*                       complain. */

                            alaerh_("DPF", "DPFSV ", &info, &izero, uplo, &n, 
                                    &n, &c_n1, &c_n1, &nrhs, &iit, &nfail, &
                                    nerrs, nout);
                            goto L100;
                        }

/*                    Skip the tests if INFO is not 0. */

                        if (info != 0) {
                            goto L100;
                        }

                        s_copy(srnamc_1.srnamt, "DPFTRS", (ftnlen)32, (ftnlen)
                                6);
                        dpftrs_(cform, uplo, &n, &nrhs, &arf[1], &x[1], &ldb, 
                                &info);

                        s_copy(srnamc_1.srnamt, "DTFTTR", (ftnlen)32, (ftnlen)
                                6);
                        dtfttr_(cform, uplo, &n, &arf[1], &afac[1], &lda, &
                                info);

/*                    Reconstruct matrix from factors and compute */
/*                    residual. */

                        dlacpy_(uplo, &n, &n, &afac[1], &lda, &asav[1], &lda);
                        dpot01_(uplo, &n, &a[1], &lda, &afac[1], &lda, &
                                d_work_dpot01__[1], result);
                        dlacpy_(uplo, &n, &n, &asav[1], &lda, &afac[1], &lda);

/*                    Form the inverse and compute the residual. */

                        if (n % 2 == 0) {
                            i__4 = n + 1;
                            i__5 = n / 2;
                            i__6 = n + 1;
                            i__7 = n + 1;
                            dlacpy_("A", &i__4, &i__5, &arf[1], &i__6, &
                                    arfinv[1], &i__7);
                        } else {
                            i__4 = (n + 1) / 2;
                            dlacpy_("A", &n, &i__4, &arf[1], &n, &arfinv[1], &
                                    n);
                        }

                        s_copy(srnamc_1.srnamt, "DPFTRI", (ftnlen)32, (ftnlen)
                                6);
                        dpftri_(cform, uplo, &n, &arfinv[1], &info);

                        s_copy(srnamc_1.srnamt, "DTFTTR", (ftnlen)32, (ftnlen)
                                6);
                        dtfttr_(cform, uplo, &n, &arfinv[1], &ainv[1], &lda, &
                                info);

/*                    Check error code from DPFTRI. */

                        if (info != 0) {
                            alaerh_("DPO", "DPFTRI", &info, &c__0, uplo, &n, &
                                    n, &c_n1, &c_n1, &c_n1, &imat, &nfail, &
                                    nerrs, nout);
                        }

                        dpot03_(uplo, &n, &a[1], &lda, &ainv[1], &lda, &
                                d_temp_dpot03__[1], &lda, &d_work_dpot03__[1], 
                                 &rcondc, &result[1]);

/*                    Compute residual of the computed solution. */

                        dlacpy_("Full", &n, &nrhs, &b[1], &lda, &
                                d_temp_dpot02__[1], &lda);
                        dpot02_(uplo, &n, &nrhs, &a[1], &lda, &x[1], &lda, &
                                d_temp_dpot02__[1], &lda, &d_work_dpot02__[1], 
                                 &result[2]);

/*                    Check solution from generated exact solution. */
                        dget04_(&n, &nrhs, &x[1], &lda, &xact[1], &lda, &
                                rcondc, &result[3]);
                        nt = 4;

/*                    Print information about the tests that did not */
/*                    pass the threshold. */

                        i__4 = nt;
                        for (k = 1; k <= i__4; ++k) {
                            if (result[k - 1] >= *thresh) {
                                if (nfail == 0 && nerrs == 0) {
                                    aladhd_(nout, "DPF");
                                }
                                io___37.ciunit = *nout;
                                s_wsfe(&io___37);
                                do_fio(&c__1, "DPFSV ", (ftnlen)6);
                                do_fio(&c__1, uplo, (ftnlen)1);
                                do_fio(&c__1, (char *)&n, (ftnlen)sizeof(
                                        integer));
                                do_fio(&c__1, (char *)&iit, (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;
                            }
/* L60: */
                        }
                        nrun += nt;
L100:
                        ;
                    }
/* L110: */
                }
L120:
                ;
            }
/* L980: */
        }
/* L130: */
    }

/*     Print a summary of the results. */

    alasvm_("DPF", nout, &nfail, &nrun, &nerrs);


    return 0;

/*     End of DDRVRFP */

} /* ddrvrfp_ */