ddrvgb.c

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/* ddrvgb.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 {
    integer infot, nunit;
    logical ok, lerr;
} infoc_;

#define infoc_1 infoc_

struct {
    char srnamt[32];
} srnamc_;

#define srnamc_1 srnamc_

/* Table of constant values */

static integer c__1 = 1;
static integer c__2 = 2;
static integer c__0 = 0;
static integer c_n1 = -1;
static doublereal c_b48 = 0.;
static doublereal c_b49 = 1.;
static integer c__6 = 6;
static integer c__7 = 7;

/* Subroutine */ int ddrvgb_(logical *dotype, integer *nn, integer *nval, 
        integer *nrhs, doublereal *thresh, logical *tsterr, doublereal *a, 
        integer *la, doublereal *afb, integer *lafb, doublereal *asav, 
        doublereal *b, doublereal *bsav, doublereal *x, doublereal *xact, 
        doublereal *s, doublereal *work, doublereal *rwork, integer *iwork, 
        integer *nout)
{
    /* Initialized data */

    static integer iseedy[4] = { 1988,1989,1990,1991 };
    static char transs[1*3] = "N" "T" "C";
    static char facts[1*3] = "F" "N" "E";
    static char equeds[1*4] = "N" "R" "C" "B";

    /* Format strings */
    static char fmt_9999[] = "(\002 *** In DDRVGB, LA=\002,i5,\002 is too sm"
            "all for N=\002,i5,\002, KU=\002,i5,\002, KL=\002,i5,/\002 ==> In"
            "crease LA to at least \002,i5)";
    static char fmt_9998[] = "(\002 *** In DDRVGB, LAFB=\002,i5,\002 is too "
            "small for N=\002,i5,\002, KU=\002,i5,\002, KL=\002,i5,/\002 ==> "
            "Increase LAFB to at least \002,i5)";
    static char fmt_9997[] = "(1x,a,\002, N=\002,i5,\002, KL=\002,i5,\002, K"
            "U=\002,i5,\002, type \002,i1,\002, test(\002,i1,\002)=\002,g12.5)"
            ;
    static char fmt_9995[] = "(1x,a,\002( '\002,a1,\002','\002,a1,\002',\002"
            ",i5,\002,\002,i5,\002,\002,i5,\002,...), EQUED='\002,a1,\002', t"
            "ype \002,i1,\002, test(\002,i1,\002)=\002,g12.5)";
    static char fmt_9996[] = "(1x,a,\002( '\002,a1,\002','\002,a1,\002',\002"
            ",i5,\002,\002,i5,\002,\002,i5,\002,...), type \002,i1,\002, test("
            "\002,i1,\002)=\002,g12.5)";

    /* System generated locals */
    address a__1[2];
    integer i__1, i__2, i__3, i__4, i__5, i__6, i__7, i__8, i__9, i__10, 
            i__11[2];
    doublereal d__1, d__2, d__3;
    char ch__1[2];

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

    /* Local variables */
    integer i__, j, k, n, i1, i2, k1, nb, in, kl, ku, nt, lda, ldb, ikl, nkl, 
            iku, nku;
    char fact[1];
    integer ioff, mode;
    doublereal amax;
    char path[3];
    integer imat, info;
    char dist[1], type__[1];
    integer nrun, ldafb;
    extern /* Subroutine */ int dgbt01_(integer *, integer *, integer *, 
            integer *, doublereal *, integer *, doublereal *, integer *, 
            integer *, doublereal *, doublereal *), dgbt02_(char *, integer *, 
             integer *, integer *, integer *, integer *, doublereal *, 
            integer *, doublereal *, integer *, doublereal *, integer *, 
            doublereal *), dgbt05_(char *, integer *, integer *, 
            integer *, integer *, doublereal *, integer *, doublereal *, 
            integer *, doublereal *, integer *, doublereal *, integer *, 
            doublereal *, doublereal *, doublereal *);
    integer ifact;
    extern /* Subroutine */ int dget04_(integer *, integer *, doublereal *, 
            integer *, doublereal *, integer *, doublereal *, doublereal *);
    integer nfail, iseed[4], nfact;
    extern doublereal dget06_(doublereal *, doublereal *);
    extern logical lsame_(char *, char *);
    char equed[1];
    integer nbmin;
    doublereal rcond, roldc;
    extern /* Subroutine */ int dgbsv_(integer *, integer *, integer *, 
            integer *, doublereal *, integer *, integer *, doublereal *, 
            integer *, integer *);
    integer nimat;
    doublereal roldi, anorm;
    integer itran;
    logical equil;
    doublereal roldo;
    char trans[1];
    integer izero, nerrs;
    logical zerot;
    char xtype[1];
    extern /* Subroutine */ int dlatb4_(char *, integer *, integer *, integer 
            *, char *, integer *, integer *, doublereal *, integer *, 
            doublereal *, char *), aladhd_(integer *, 
            char *);
    extern doublereal dlangb_(char *, integer *, integer *, integer *, 
            doublereal *, integer *, doublereal *), dlamch_(char *), dlange_(char *, integer *, integer *, doublereal *, 
            integer *, doublereal *);
    extern /* Subroutine */ int dlaqgb_(integer *, integer *, integer *, 
            integer *, doublereal *, integer *, doublereal *, doublereal *, 
            doublereal *, doublereal *, doublereal *, char *), 
            alaerh_(char *, char *, integer *, integer *, char *, integer *, 
            integer *, integer *, integer *, integer *, integer *, integer *, 
            integer *, integer *);
    logical prefac;
    doublereal colcnd;
    extern doublereal dlantb_(char *, char *, char *, integer *, integer *, 
            doublereal *, integer *, doublereal *);
    extern /* Subroutine */ int dgbequ_(integer *, integer *, integer *, 
            integer *, doublereal *, integer *, doublereal *, doublereal *, 
            doublereal *, doublereal *, doublereal *, integer *);
    doublereal rcondc;
    logical nofact;
    extern /* Subroutine */ int dgbtrf_(integer *, integer *, integer *, 
            integer *, doublereal *, integer *, integer *, integer *);
    integer iequed;
    extern /* Subroutine */ int dlacpy_(char *, integer *, integer *, 
            doublereal *, integer *, doublereal *, integer *);
    doublereal rcondi;
    extern /* Subroutine */ int dlarhs_(char *, char *, char *, char *, 
            integer *, integer *, integer *, integer *, integer *, doublereal 
            *, integer *, doublereal *, integer *, doublereal *, integer *, 
            integer *, integer *), dlaset_(
            char *, integer *, integer *, doublereal *, doublereal *, 
            doublereal *, integer *), alasvm_(char *, integer *, 
            integer *, integer *, integer *);
    doublereal cndnum, anormi, rcondo, ainvnm;
    extern /* Subroutine */ int dgbtrs_(char *, integer *, integer *, integer 
            *, integer *, doublereal *, integer *, integer *, doublereal *, 
            integer *, integer *), dlatms_(integer *, integer *, char 
            *, integer *, char *, doublereal *, integer *, doublereal *, 
            doublereal *, integer *, integer *, char *, doublereal *, integer 
            *, doublereal *, integer *);
    logical trfcon;
    doublereal anormo, rowcnd;
    extern /* Subroutine */ int dgbsvx_(char *, char *, integer *, integer *, 
            integer *, integer *, doublereal *, integer *, doublereal *, 
            integer *, integer *, char *, doublereal *, doublereal *, 
            doublereal *, integer *, doublereal *, integer *, doublereal *, 
            doublereal *, doublereal *, doublereal *, integer *, integer *), xlaenv_(integer *, integer *);
    doublereal anrmpv;
    extern /* Subroutine */ int derrvx_(char *, integer *);
    doublereal result[7], rpvgrw;

    /* Fortran I/O blocks */
    static cilist io___26 = { 0, 0, 0, fmt_9999, 0 };
    static cilist io___27 = { 0, 0, 0, fmt_9998, 0 };
    static cilist io___65 = { 0, 0, 0, fmt_9997, 0 };
    static cilist io___72 = { 0, 0, 0, fmt_9995, 0 };
    static cilist io___73 = { 0, 0, 0, fmt_9996, 0 };
    static cilist io___74 = { 0, 0, 0, fmt_9995, 0 };
    static cilist io___75 = { 0, 0, 0, fmt_9996, 0 };
    static cilist io___76 = { 0, 0, 0, fmt_9995, 0 };
    static cilist io___77 = { 0, 0, 0, fmt_9996, 0 };
    static cilist io___78 = { 0, 0, 0, fmt_9995, 0 };
    static cilist io___79 = { 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 */
/*  ======= */

/*  DDRVGB tests the driver routines DGBSV and -SVX. */

/*  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. */

/*  NRHS    (input) INTEGER */
/*          The number of right hand side vectors to be generated for */
/*          each linear system. */

/*  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. */

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

/*  LA      (input) INTEGER */
/*          The length of the array A.  LA >= (2*NMAX-1)*NMAX */
/*          where NMAX is the largest entry in NVAL. */

/*  AFB     (workspace) DOUBLE PRECISION array, dimension (LAFB) */

/*  LAFB    (input) INTEGER */
/*          The length of the array AFB.  LAFB >= (3*NMAX-2)*NMAX */
/*          where NMAX is the largest entry in NVAL. */

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

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

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

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

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

/*  S       (workspace) DOUBLE PRECISION array, dimension (2*NMAX) */

/*  WORK    (workspace) DOUBLE PRECISION array, dimension */
/*                      (NMAX*max(3,NRHS,NMAX)) */

/*  RWORK   (workspace) DOUBLE PRECISION array, dimension */
/*                      (max(NMAX,2*NRHS)) */

/*  IWORK   (workspace) INTEGER array, dimension (2*NMAX) */

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

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

/*     .. Parameters .. */
/*     .. */
/*     .. Local Scalars .. */
/*     .. */
/*     .. Local Arrays .. */
/*     .. */
/*     .. External Functions .. */
/*     .. */
/*     .. External Subroutines .. */
/*     .. */
/*     .. Intrinsic Functions .. */
/*     .. */
/*     .. Scalars in Common .. */
/*     .. */
/*     .. Common blocks .. */
/*     .. */
/*     .. Data statements .. */
    /* Parameter adjustments */
    --iwork;
    --rwork;
    --work;
    --s;
    --xact;
    --x;
    --bsav;
    --b;
    --asav;
    --afb;
    --a;
    --nval;
    --dotype;

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

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

    s_copy(path, "Double precision", (ftnlen)1, (ftnlen)16);
    s_copy(path + 1, "GB", (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) {
        derrvx_(path, nout);
    }
    infoc_1.infot = 0;

/*     Set the block size and minimum block size for testing. */

    nb = 1;
    nbmin = 2;
    xlaenv_(&c__1, &nb);
    xlaenv_(&c__2, &nbmin);

/*     Do for each value of N in NVAL */

    i__1 = *nn;
    for (in = 1; in <= i__1; ++in) {
        n = nval[in];
        ldb = max(n,1);
        *(unsigned char *)xtype = 'N';

/*        Set limits on the number of loop iterations. */

/* Computing MAX */
        i__2 = 1, i__3 = min(n,4);
        nkl = max(i__2,i__3);
        if (n == 0) {
            nkl = 1;
        }
        nku = nkl;
        nimat = 8;
        if (n <= 0) {
            nimat = 1;
        }

        i__2 = nkl;
        for (ikl = 1; ikl <= i__2; ++ikl) {

/*           Do for KL = 0, N-1, (3N-1)/4, and (N+1)/4. This order makes */
/*           it easier to skip redundant values for small values of N. */

            if (ikl == 1) {
                kl = 0;
            } else if (ikl == 2) {
/* Computing MAX */
                i__3 = n - 1;
                kl = max(i__3,0);
            } else if (ikl == 3) {
                kl = (n * 3 - 1) / 4;
            } else if (ikl == 4) {
                kl = (n + 1) / 4;
            }
            i__3 = nku;
            for (iku = 1; iku <= i__3; ++iku) {

/*              Do for KU = 0, N-1, (3N-1)/4, and (N+1)/4. This order */
/*              makes it easier to skip redundant values for small */
/*              values of N. */

                if (iku == 1) {
                    ku = 0;
                } else if (iku == 2) {
/* Computing MAX */
                    i__4 = n - 1;
                    ku = max(i__4,0);
                } else if (iku == 3) {
                    ku = (n * 3 - 1) / 4;
                } else if (iku == 4) {
                    ku = (n + 1) / 4;
                }

/*              Check that A and AFB are big enough to generate this */
/*              matrix. */

                lda = kl + ku + 1;
                ldafb = (kl << 1) + ku + 1;
                if (lda * n > *la || ldafb * n > *lafb) {
                    if (nfail == 0 && nerrs == 0) {
                        aladhd_(nout, path);
                    }
                    if (lda * n > *la) {
                        io___26.ciunit = *nout;
                        s_wsfe(&io___26);
                        do_fio(&c__1, (char *)&(*la), (ftnlen)sizeof(integer))
                                ;
                        do_fio(&c__1, (char *)&n, (ftnlen)sizeof(integer));
                        do_fio(&c__1, (char *)&kl, (ftnlen)sizeof(integer));
                        do_fio(&c__1, (char *)&ku, (ftnlen)sizeof(integer));
                        i__4 = n * (kl + ku + 1);
                        do_fio(&c__1, (char *)&i__4, (ftnlen)sizeof(integer));
                        e_wsfe();
                        ++nerrs;
                    }
                    if (ldafb * n > *lafb) {
                        io___27.ciunit = *nout;
                        s_wsfe(&io___27);
                        do_fio(&c__1, (char *)&(*lafb), (ftnlen)sizeof(
                                integer));
                        do_fio(&c__1, (char *)&n, (ftnlen)sizeof(integer));
                        do_fio(&c__1, (char *)&kl, (ftnlen)sizeof(integer));
                        do_fio(&c__1, (char *)&ku, (ftnlen)sizeof(integer));
                        i__4 = n * ((kl << 1) + ku + 1);
                        do_fio(&c__1, (char *)&i__4, (ftnlen)sizeof(integer));
                        e_wsfe();
                        ++nerrs;
                    }
                    goto L130;
                }

                i__4 = nimat;
                for (imat = 1; imat <= i__4; ++imat) {

/*                 Do the tests only if DOTYPE( IMAT ) is true. */

                    if (! dotype[imat]) {
                        goto L120;
                    }

/*                 Skip types 2, 3, or 4 if the matrix is too small. */

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

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

                    dlatb4_(path, &imat, &n, &n, type__, &kl, &ku, &anorm, &
                            mode, &cndnum, dist);
                    rcondc = 1. / cndnum;

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

/*                 Check the error code from DLATMS. */

                    if (info != 0) {
                        alaerh_(path, "DLATMS", &info, &c__0, " ", &n, &n, &
                                kl, &ku, &c_n1, &imat, &nfail, &nerrs, nout);
                        goto L120;
                    }

/*                 For types 2, 3, and 4, zero one or more columns of */
/*                 the matrix to test that INFO is returned correctly. */

                    izero = 0;
                    if (zerot) {
                        if (imat == 2) {
                            izero = 1;
                        } else if (imat == 3) {
                            izero = n;
                        } else {
                            izero = n / 2 + 1;
                        }
                        ioff = (izero - 1) * lda;
                        if (imat < 4) {
/* Computing MAX */
                            i__5 = 1, i__6 = ku + 2 - izero;
                            i1 = max(i__5,i__6);
/* Computing MIN */
                            i__5 = kl + ku + 1, i__6 = ku + 1 + (n - izero);
                            i2 = min(i__5,i__6);
                            i__5 = i2;
                            for (i__ = i1; i__ <= i__5; ++i__) {
                                a[ioff + i__] = 0.;
/* L20: */
                            }
                        } else {
                            i__5 = n;
                            for (j = izero; j <= i__5; ++j) {
/* Computing MAX */
                                i__6 = 1, i__7 = ku + 2 - j;
/* Computing MIN */
                                i__9 = kl + ku + 1, i__10 = ku + 1 + (n - j);
                                i__8 = min(i__9,i__10);
                                for (i__ = max(i__6,i__7); i__ <= i__8; ++i__)
                                         {
                                    a[ioff + i__] = 0.;
/* L30: */
                                }
                                ioff += lda;
/* L40: */
                            }
                        }
                    }

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

                    i__5 = kl + ku + 1;
                    dlacpy_("Full", &i__5, &n, &a[1], &lda, &asav[1], &lda);

                    for (iequed = 1; iequed <= 4; ++iequed) {
                        *(unsigned char *)equed = *(unsigned char *)&equeds[
                                iequed - 1];
                        if (iequed == 1) {
                            nfact = 3;
                        } else {
                            nfact = 1;
                        }

                        i__5 = nfact;
                        for (ifact = 1; ifact <= i__5; ++ifact) {
                            *(unsigned char *)fact = *(unsigned char *)&facts[
                                    ifact - 1];
                            prefac = lsame_(fact, "F");
                            nofact = lsame_(fact, "N");
                            equil = lsame_(fact, "E");

                            if (zerot) {
                                if (prefac) {
                                    goto L100;
                                }
                                rcondo = 0.;
                                rcondi = 0.;

                            } else if (! nofact) {

/*                          Compute the condition number for comparison */
/*                          with the value returned by DGESVX (FACT = */
/*                          'N' reuses the condition number from the */
/*                          previous iteration with FACT = 'F'). */

                                i__8 = kl + ku + 1;
                                dlacpy_("Full", &i__8, &n, &asav[1], &lda, &
                                        afb[kl + 1], &ldafb);
                                if (equil || iequed > 1) {

/*                             Compute row and column scale factors to */
/*                             equilibrate the matrix A. */

                                    dgbequ_(&n, &n, &kl, &ku, &afb[kl + 1], &
                                            ldafb, &s[1], &s[n + 1], &rowcnd, 
                                            &colcnd, &amax, &info);
                                    if (info == 0 && n > 0) {
                                        if (lsame_(equed, "R")) {
                                            rowcnd = 0.;
                                            colcnd = 1.;
                                        } else if (lsame_(equed, "C")) {
                                            rowcnd = 1.;
                                            colcnd = 0.;
                                        } else if (lsame_(equed, "B")) {
                                            rowcnd = 0.;
                                            colcnd = 0.;
                                        }

/*                                Equilibrate the matrix. */

                                        dlaqgb_(&n, &n, &kl, &ku, &afb[kl + 1]
, &ldafb, &s[1], &s[n + 1], &
                                                rowcnd, &colcnd, &amax, equed);
                                    }
                                }

/*                          Save the condition number of the */
/*                          non-equilibrated system for use in DGET04. */

                                if (equil) {
                                    roldo = rcondo;
                                    roldi = rcondi;
                                }

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

                                anormo = dlangb_("1", &n, &kl, &ku, &afb[kl + 
                                        1], &ldafb, &rwork[1]);
                                anormi = dlangb_("I", &n, &kl, &ku, &afb[kl + 
                                        1], &ldafb, &rwork[1]);

/*                          Factor the matrix A. */

                                dgbtrf_(&n, &n, &kl, &ku, &afb[1], &ldafb, &
                                        iwork[1], &info);

/*                          Form the inverse of A. */

                                dlaset_("Full", &n, &n, &c_b48, &c_b49, &work[
                                        1], &ldb);
                                s_copy(srnamc_1.srnamt, "DGBTRS", (ftnlen)32, 
                                        (ftnlen)6);
                                dgbtrs_("No transpose", &n, &kl, &ku, &n, &
                                        afb[1], &ldafb, &iwork[1], &work[1], &
                                        ldb, &info);

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

                                ainvnm = dlange_("1", &n, &n, &work[1], &ldb, 
                                        &rwork[1]);
                                if (anormo <= 0. || ainvnm <= 0.) {
                                    rcondo = 1.;
                                } else {
                                    rcondo = 1. / anormo / ainvnm;
                                }

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

                                ainvnm = dlange_("I", &n, &n, &work[1], &ldb, 
                                        &rwork[1]);
                                if (anormi <= 0. || ainvnm <= 0.) {
                                    rcondi = 1.;
                                } else {
                                    rcondi = 1. / anormi / ainvnm;
                                }
                            }

                            for (itran = 1; itran <= 3; ++itran) {

/*                          Do for each value of TRANS. */

                                *(unsigned char *)trans = *(unsigned char *)&
                                        transs[itran - 1];
                                if (itran == 1) {
                                    rcondc = rcondo;
                                } else {
                                    rcondc = rcondi;
                                }

/*                          Restore the matrix A. */

                                i__8 = kl + ku + 1;
                                dlacpy_("Full", &i__8, &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_(path, xtype, "Full", trans, &n, &n, &
                                        kl, &ku, nrhs, &a[1], &lda, &xact[1], 
                                        &ldb, &b[1], &ldb, iseed, &info);
                                *(unsigned char *)xtype = 'C';
                                dlacpy_("Full", &n, nrhs, &b[1], &ldb, &bsav[
                                        1], &ldb);

                                if (nofact && itran == 1) {

/*                             --- Test DGBSV  --- */

/*                             Compute the LU factorization of the matrix */
/*                             and solve the system. */

                                    i__8 = kl + ku + 1;
                                    dlacpy_("Full", &i__8, &n, &a[1], &lda, &
                                            afb[kl + 1], &ldafb);
                                    dlacpy_("Full", &n, nrhs, &b[1], &ldb, &x[
                                            1], &ldb);

                                    s_copy(srnamc_1.srnamt, "DGBSV ", (ftnlen)
                                            32, (ftnlen)6);
                                    dgbsv_(&n, &kl, &ku, nrhs, &afb[1], &
                                            ldafb, &iwork[1], &x[1], &ldb, &
                                            info);

/*                             Check error code from DGBSV . */

                                    if (info != izero) {
                                        alaerh_(path, "DGBSV ", &info, &izero, 
                                                 " ", &n, &n, &kl, &ku, nrhs, 
                                                &imat, &nfail, &nerrs, nout);
                                    }

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

                                    dgbt01_(&n, &n, &kl, &ku, &a[1], &lda, &
                                            afb[1], &ldafb, &iwork[1], &work[
                                            1], result);
                                    nt = 1;
                                    if (izero == 0) {

/*                                Compute residual of the computed */
/*                                solution. */

                                        dlacpy_("Full", &n, nrhs, &b[1], &ldb, 
                                                 &work[1], &ldb);
                                        dgbt02_("No transpose", &n, &n, &kl, &
                                                ku, nrhs, &a[1], &lda, &x[1], 
                                                &ldb, &work[1], &ldb, &result[
                                                1]);

/*                                Check solution from generated exact */
/*                                solution. */

                                        dget04_(&n, nrhs, &x[1], &ldb, &xact[
                                                1], &ldb, &rcondc, &result[2])
                                                ;
                                        nt = 3;
                                    }

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

                                    i__8 = nt;
                                    for (k = 1; k <= i__8; ++k) {
                                        if (result[k - 1] >= *thresh) {
                                            if (nfail == 0 && nerrs == 0) {
                          aladhd_(nout, path);
                                            }
                                            io___65.ciunit = *nout;
                                            s_wsfe(&io___65);
                                            do_fio(&c__1, "DGBSV ", (ftnlen)6)
                                                    ;
                                            do_fio(&c__1, (char *)&n, (ftnlen)
                                                    sizeof(integer));
                                            do_fio(&c__1, (char *)&kl, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&ku, (
                                                    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;
                                        }
/* L50: */
                                    }
                                    nrun += nt;
                                }

/*                          --- Test DGBSVX --- */

                                if (! prefac) {
                                    i__8 = (kl << 1) + ku + 1;
                                    dlaset_("Full", &i__8, &n, &c_b48, &c_b48, 
                                             &afb[1], &ldafb);
                                }
                                dlaset_("Full", &n, nrhs, &c_b48, &c_b48, &x[
                                        1], &ldb);
                                if (iequed > 1 && n > 0) {

/*                             Equilibrate the matrix if FACT = 'F' and */
/*                             EQUED = 'R', 'C', or 'B'. */

                                    dlaqgb_(&n, &n, &kl, &ku, &a[1], &lda, &s[
                                            1], &s[n + 1], &rowcnd, &colcnd, &
                                            amax, equed);
                                }

/*                          Solve the system and compute the condition */
/*                          number and error bounds using DGBSVX. */

                                s_copy(srnamc_1.srnamt, "DGBSVX", (ftnlen)32, 
                                        (ftnlen)6);
                                dgbsvx_(fact, trans, &n, &kl, &ku, nrhs, &a[1]
, &lda, &afb[1], &ldafb, &iwork[1], 
                                        equed, &s[1], &s[n + 1], &b[1], &ldb, 
                                        &x[1], &ldb, &rcond, &rwork[1], &
                                        rwork[*nrhs + 1], &work[1], &iwork[n 
                                        + 1], &info);

/*                          Check the error code from DGBSVX. */

                                if (info != izero) {
/* Writing concatenation */
                                    i__11[0] = 1, a__1[0] = fact;
                                    i__11[1] = 1, a__1[1] = trans;
                                    s_cat(ch__1, a__1, i__11, &c__2, (ftnlen)
                                            2);
                                    alaerh_(path, "DGBSVX", &info, &izero, 
                                            ch__1, &n, &n, &kl, &ku, nrhs, &
                                            imat, &nfail, &nerrs, nout);
                                }

/*                          Compare WORK(1) from DGBSVX with the computed */
/*                          reciprocal pivot growth factor RPVGRW */

                                if (info != 0) {
                                    anrmpv = 0.;
                                    i__8 = info;
                                    for (j = 1; j <= i__8; ++j) {
/* Computing MAX */
                                        i__6 = ku + 2 - j;
/* Computing MIN */
                                        i__9 = n + ku + 1 - j, i__10 = kl + 
                                                ku + 1;
                                        i__7 = min(i__9,i__10);
                                        for (i__ = max(i__6,1); i__ <= i__7; 
                                                ++i__) {
/* Computing MAX */
                                            d__2 = anrmpv, d__3 = (d__1 = a[
                                                    i__ + (j - 1) * lda], abs(
                                                    d__1));
                                            anrmpv = max(d__2,d__3);
/* L60: */
                                        }
/* L70: */
                                    }
/* Computing MIN */
                                    i__7 = info - 1, i__6 = kl + ku;
                                    i__8 = min(i__7,i__6);
/* Computing MAX */
                                    i__9 = 1, i__10 = kl + ku + 2 - info;
                                    rpvgrw = dlantb_("M", "U", "N", &info, &
                                            i__8, &afb[max(i__9, i__10)], &
                                            ldafb, &work[1]);
                                    if (rpvgrw == 0.) {
                                        rpvgrw = 1.;
                                    } else {
                                        rpvgrw = anrmpv / rpvgrw;
                                    }
                                } else {
                                    i__8 = kl + ku;
                                    rpvgrw = dlantb_("M", "U", "N", &n, &i__8, 
                                             &afb[1], &ldafb, &work[1]);
                                    if (rpvgrw == 0.) {
                                        rpvgrw = 1.;
                                    } else {
                                        rpvgrw = dlangb_("M", &n, &kl, &ku, &
                                                a[1], &lda, &work[1]) / rpvgrw;
                                    }
                                }
                                result[6] = (d__1 = rpvgrw - work[1], abs(
                                        d__1)) / max(work[1],rpvgrw) / 
                                        dlamch_("E");

                                if (! prefac) {

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

                                    dgbt01_(&n, &n, &kl, &ku, &a[1], &lda, &
                                            afb[1], &ldafb, &iwork[1], &work[
                                            1], result);
                                    k1 = 1;
                                } else {
                                    k1 = 2;
                                }

                                if (info == 0) {
                                    trfcon = FALSE_;

/*                             Compute residual of the computed solution. */

                                    dlacpy_("Full", &n, nrhs, &bsav[1], &ldb, 
                                            &work[1], &ldb);
                                    dgbt02_(trans, &n, &n, &kl, &ku, nrhs, &
                                            asav[1], &lda, &x[1], &ldb, &work[
                                            1], &ldb, &result[1]);

/*                             Check solution from generated exact */
/*                             solution. */

                                    if (nofact || prefac && lsame_(equed, 
                                            "N")) {
                                        dget04_(&n, nrhs, &x[1], &ldb, &xact[
                                                1], &ldb, &rcondc, &result[2])
                                                ;
                                    } else {
                                        if (itran == 1) {
                                            roldc = roldo;
                                        } else {
                                            roldc = roldi;
                                        }
                                        dget04_(&n, nrhs, &x[1], &ldb, &xact[
                                                1], &ldb, &roldc, &result[2]);
                                    }

/*                             Check the error bounds from iterative */
/*                             refinement. */

                                    dgbt05_(trans, &n, &kl, &ku, nrhs, &asav[
                                            1], &lda, &b[1], &ldb, &x[1], &
                                            ldb, &xact[1], &ldb, &rwork[1], &
                                            rwork[*nrhs + 1], &result[3]);
                                } else {
                                    trfcon = TRUE_;
                                }

/*                          Compare RCOND from DGBSVX with the computed */
/*                          value in RCONDC. */

                                result[5] = dget06_(&rcond, &rcondc);

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

                                if (! trfcon) {
                                    for (k = k1; k <= 7; ++k) {
                                        if (result[k - 1] >= *thresh) {
                                            if (nfail == 0 && nerrs == 0) {
                          aladhd_(nout, path);
                                            }
                                            if (prefac) {
                          io___72.ciunit = *nout;
                          s_wsfe(&io___72);
                          do_fio(&c__1, "DGBSVX", (ftnlen)6);
                          do_fio(&c__1, fact, (ftnlen)1);
                          do_fio(&c__1, trans, (ftnlen)1);
                          do_fio(&c__1, (char *)&n, (ftnlen)sizeof(integer));
                          do_fio(&c__1, (char *)&kl, (ftnlen)sizeof(integer));
                          do_fio(&c__1, (char *)&ku, (ftnlen)sizeof(integer));
                          do_fio(&c__1, equed, (ftnlen)1);
                          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();
                                            } else {
                          io___73.ciunit = *nout;
                          s_wsfe(&io___73);
                          do_fio(&c__1, "DGBSVX", (ftnlen)6);
                          do_fio(&c__1, fact, (ftnlen)1);
                          do_fio(&c__1, trans, (ftnlen)1);
                          do_fio(&c__1, (char *)&n, (ftnlen)sizeof(integer));
                          do_fio(&c__1, (char *)&kl, (ftnlen)sizeof(integer));
                          do_fio(&c__1, (char *)&ku, (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;
                                        }
/* L80: */
                                    }
                                    nrun = nrun + 7 - k1;
                                } else {
                                    if (result[0] >= *thresh && ! prefac) {
                                        if (nfail == 0 && nerrs == 0) {
                                            aladhd_(nout, path);
                                        }
                                        if (prefac) {
                                            io___74.ciunit = *nout;
                                            s_wsfe(&io___74);
                                            do_fio(&c__1, "DGBSVX", (ftnlen)6)
                                                    ;
                                            do_fio(&c__1, fact, (ftnlen)1);
                                            do_fio(&c__1, trans, (ftnlen)1);
                                            do_fio(&c__1, (char *)&n, (ftnlen)
                                                    sizeof(integer));
                                            do_fio(&c__1, (char *)&kl, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&ku, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, equed, (ftnlen)1);
                                            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();
                                        } else {
                                            io___75.ciunit = *nout;
                                            s_wsfe(&io___75);
                                            do_fio(&c__1, "DGBSVX", (ftnlen)6)
                                                    ;
                                            do_fio(&c__1, fact, (ftnlen)1);
                                            do_fio(&c__1, trans, (ftnlen)1);
                                            do_fio(&c__1, (char *)&n, (ftnlen)
                                                    sizeof(integer));
                                            do_fio(&c__1, (char *)&kl, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&ku, (
                                                    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;
                                    }
                                    if (result[5] >= *thresh) {
                                        if (nfail == 0 && nerrs == 0) {
                                            aladhd_(nout, path);
                                        }
                                        if (prefac) {
                                            io___76.ciunit = *nout;
                                            s_wsfe(&io___76);
                                            do_fio(&c__1, "DGBSVX", (ftnlen)6)
                                                    ;
                                            do_fio(&c__1, fact, (ftnlen)1);
                                            do_fio(&c__1, trans, (ftnlen)1);
                                            do_fio(&c__1, (char *)&n, (ftnlen)
                                                    sizeof(integer));
                                            do_fio(&c__1, (char *)&kl, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&ku, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, equed, (ftnlen)1);
                                            do_fio(&c__1, (char *)&imat, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&c__6, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&result[5], 
                                                    (ftnlen)sizeof(doublereal)
                                                    );
                                            e_wsfe();
                                        } else {
                                            io___77.ciunit = *nout;
                                            s_wsfe(&io___77);
                                            do_fio(&c__1, "DGBSVX", (ftnlen)6)
                                                    ;
                                            do_fio(&c__1, fact, (ftnlen)1);
                                            do_fio(&c__1, trans, (ftnlen)1);
                                            do_fio(&c__1, (char *)&n, (ftnlen)
                                                    sizeof(integer));
                                            do_fio(&c__1, (char *)&kl, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&ku, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&imat, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&c__6, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&result[5], 
                                                    (ftnlen)sizeof(doublereal)
                                                    );
                                            e_wsfe();
                                        }
                                        ++nfail;
                                        ++nrun;
                                    }
                                    if (result[6] >= *thresh) {
                                        if (nfail == 0 && nerrs == 0) {
                                            aladhd_(nout, path);
                                        }
                                        if (prefac) {
                                            io___78.ciunit = *nout;
                                            s_wsfe(&io___78);
                                            do_fio(&c__1, "DGBSVX", (ftnlen)6)
                                                    ;
                                            do_fio(&c__1, fact, (ftnlen)1);
                                            do_fio(&c__1, trans, (ftnlen)1);
                                            do_fio(&c__1, (char *)&n, (ftnlen)
                                                    sizeof(integer));
                                            do_fio(&c__1, (char *)&kl, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&ku, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, equed, (ftnlen)1);
                                            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();
                                        } else {
                                            io___79.ciunit = *nout;
                                            s_wsfe(&io___79);
                                            do_fio(&c__1, "DGBSVX", (ftnlen)6)
                                                    ;
                                            do_fio(&c__1, fact, (ftnlen)1);
                                            do_fio(&c__1, trans, (ftnlen)1);
                                            do_fio(&c__1, (char *)&n, (ftnlen)
                                                    sizeof(integer));
                                            do_fio(&c__1, (char *)&kl, (
                                                    ftnlen)sizeof(integer));
                                            do_fio(&c__1, (char *)&ku, (
                                                    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;
                                    }

                                }
/* L90: */
                            }
L100:
                            ;
                        }
/* L110: */
                    }
L120:
                    ;
                }
L130:
                ;
            }
/* L140: */
        }
/* L150: */
    }

/*     Print a summary of the results. */

    alasvm_(path, nout, &nfail, &nrun, &nerrs);


    return 0;

/*     End of DDRVGB */

} /* ddrvgb_ */