schkqp.c

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/* schkqp.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, iounit;
    logical ok, lerr;
} infoc_;

#define infoc_1 infoc_

struct {
    char srnamt[32];
} srnamc_;

#define srnamc_1 srnamc_

/* Table of constant values */

static real c_b11 = 0.f;
static real c_b16 = 1.f;
static integer c__1 = 1;

/* Subroutine */ int schkqp_(logical *dotype, integer *nm, integer *mval, 
        integer *nn, integer *nval, real *thresh, logical *tsterr, real *a, 
        real *copya, real *s, real *copys, real *tau, real *work, integer *
        iwork, integer *nout)
{
    /* Initialized data */

    static integer iseedy[4] = { 1988,1989,1990,1991 };

    /* Format strings */
    static char fmt_9999[] = "(\002 M =\002,i5,\002, N =\002,i5,\002, type"
            " \002,i2,\002, test \002,i2,\002, ratio =\002,g12.5)";

    /* System generated locals */
    integer i__1, i__2, i__3, i__4;
    real r__1;

    /* 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, m, n, im, in, lda;
    real eps;
    integer mode, info;
    char path[3];
    integer ilow, nrun;
    extern /* Subroutine */ int alahd_(integer *, char *);
    integer ihigh, nfail, iseed[4], imode, mnmin, istep;
    extern doublereal sqpt01_(integer *, integer *, integer *, real *, real *, 
             integer *, real *, integer *, real *, integer *);
    integer nerrs;
    extern doublereal sqrt11_(integer *, integer *, real *, integer *, real *, 
             real *, integer *);
    integer lwork;
    extern doublereal sqrt12_(integer *, integer *, real *, integer *, real *, 
             real *, integer *), slamch_(char *);
    extern /* Subroutine */ int alasum_(char *, integer *, integer *, integer 
            *, integer *), slaord_(char *, integer *, real *, integer 
            *), sgeqpf_(integer *, integer *, real *, integer *, 
            integer *, real *, real *, integer *), slacpy_(char *, integer *, 
            integer *, real *, integer *, real *, integer *), slaset_(
            char *, integer *, integer *, real *, real *, real *, integer *), slatms_(integer *, integer *, char *, integer *, char *, 
            real *, integer *, real *, real *, integer *, integer *, char *, 
            real *, integer *, real *, integer *), 
            serrqp_(char *, integer *);
    real result[3];

    /* Fortran I/O blocks */
    static cilist io___24 = { 0, 0, 0, fmt_9999, 0 };



/*  -- LAPACK test routine (version 3.1.1) -- */
/*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
/*     January 2007 */

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

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

/*  SCHKQP tests SGEQPF. */

/*  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. */

/*  NM      (input) INTEGER */
/*          The number of values of M contained in the vector MVAL. */

/*  MVAL    (input) INTEGER array, dimension (NM) */
/*          The values of the matrix row dimension M. */

/*  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. */

/*  THRESH  (input) REAL */
/*          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) REAL array, dimension (MMAX*NMAX) */
/*          where MMAX is the maximum value of M in MVAL and NMAX is the */
/*          maximum value of N in NVAL. */

/*  COPYA   (workspace) REAL array, dimension (MMAX*NMAX) */

/*  S       (workspace) REAL array, dimension */
/*                      (min(MMAX,NMAX)) */

/*  COPYS   (workspace) REAL array, dimension */
/*                      (min(MMAX,NMAX)) */

/*  TAU     (workspace) REAL array, dimension (MMAX) */

/*  WORK    (workspace) REAL array, dimension */
/*                      (MMAX*NMAX + 4*NMAX + MMAX) */

/*  IWORK   (workspace) INTEGER array, dimension (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;
    --work;
    --tau;
    --copys;
    --s;
    --copya;
    --a;
    --nval;
    --mval;
    --dotype;

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

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

    s_copy(path, "Single precision", (ftnlen)1, (ftnlen)16);
    s_copy(path + 1, "QP", (ftnlen)2, (ftnlen)2);
    nrun = 0;
    nfail = 0;
    nerrs = 0;
    for (i__ = 1; i__ <= 4; ++i__) {
        iseed[i__ - 1] = iseedy[i__ - 1];
/* L10: */
    }
    eps = slamch_("Epsilon");

/*     Test the error exits */

    if (*tsterr) {
        serrqp_(path, nout);
    }
    infoc_1.infot = 0;

    i__1 = *nm;
    for (im = 1; im <= i__1; ++im) {

/*        Do for each value of M in MVAL. */

        m = mval[im];
        lda = max(1,m);

        i__2 = *nn;
        for (in = 1; in <= i__2; ++in) {

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

            n = nval[in];
            mnmin = min(m,n);
/* Computing MAX */
            i__3 = 1, i__4 = m * max(m,n) + (mnmin << 2) + max(m,n), i__3 = 
                    max(i__3,i__4), i__4 = m * n + (mnmin << 1) + (n << 2);
            lwork = max(i__3,i__4);

            for (imode = 1; imode <= 6; ++imode) {
                if (! dotype[imode]) {
                    goto L60;
                }

/*              Do for each type of matrix */
/*                 1:  zero matrix */
/*                 2:  one small singular value */
/*                 3:  geometric distribution of singular values */
/*                 4:  first n/2 columns fixed */
/*                 5:  last n/2 columns fixed */
/*                 6:  every second column fixed */

                mode = imode;
                if (imode > 3) {
                    mode = 1;
                }

/*              Generate test matrix of size m by n using */
/*              singular value distribution indicated by `mode'. */

                i__3 = n;
                for (i__ = 1; i__ <= i__3; ++i__) {
                    iwork[i__] = 0;
/* L20: */
                }
                if (imode == 1) {
                    slaset_("Full", &m, &n, &c_b11, &c_b11, &copya[1], &lda);
                    i__3 = mnmin;
                    for (i__ = 1; i__ <= i__3; ++i__) {
                        copys[i__] = 0.f;
/* L30: */
                    }
                } else {
                    r__1 = 1.f / eps;
                    slatms_(&m, &n, "Uniform", iseed, "Nonsymm", &copys[1], &
                            mode, &r__1, &c_b16, &m, &n, "No packing", &copya[
                            1], &lda, &work[1], &info);
                    if (imode >= 4) {
                        if (imode == 4) {
                            ilow = 1;
                            istep = 1;
/* Computing MAX */
                            i__3 = 1, i__4 = n / 2;
                            ihigh = max(i__3,i__4);
                        } else if (imode == 5) {
/* Computing MAX */
                            i__3 = 1, i__4 = n / 2;
                            ilow = max(i__3,i__4);
                            istep = 1;
                            ihigh = n;
                        } else if (imode == 6) {
                            ilow = 1;
                            istep = 2;
                            ihigh = n;
                        }
                        i__3 = ihigh;
                        i__4 = istep;
                        for (i__ = ilow; i__4 < 0 ? i__ >= i__3 : i__ <= i__3;
                                 i__ += i__4) {
                            iwork[i__] = 1;
/* L40: */
                        }
                    }
                    slaord_("Decreasing", &mnmin, &copys[1], &c__1);
                }

/*              Save A and its singular values */

                slacpy_("All", &m, &n, &copya[1], &lda, &a[1], &lda);

/*              Compute the QR factorization with pivoting of A */

                s_copy(srnamc_1.srnamt, "SGEQPF", (ftnlen)32, (ftnlen)6);
                sgeqpf_(&m, &n, &a[1], &lda, &iwork[1], &tau[1], &work[1], &
                        info);

/*              Compute norm(svd(a) - svd(r)) */

                result[0] = sqrt12_(&m, &n, &a[1], &lda, &copys[1], &work[1], 
                        &lwork);

/*              Compute norm( A*P - Q*R ) */

                result[1] = sqpt01_(&m, &n, &mnmin, &copya[1], &a[1], &lda, &
                        tau[1], &iwork[1], &work[1], &lwork);

/*              Compute Q'*Q */

                result[2] = sqrt11_(&m, &mnmin, &a[1], &lda, &tau[1], &work[1]
, &lwork);

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

                for (k = 1; k <= 3; ++k) {
                    if (result[k - 1] >= *thresh) {
                        if (nfail == 0 && nerrs == 0) {
                            alahd_(nout, path);
                        }
                        io___24.ciunit = *nout;
                        s_wsfe(&io___24);
                        do_fio(&c__1, (char *)&m, (ftnlen)sizeof(integer));
                        do_fio(&c__1, (char *)&n, (ftnlen)sizeof(integer));
                        do_fio(&c__1, (char *)&imode, (ftnlen)sizeof(integer))
                                ;
                        do_fio(&c__1, (char *)&k, (ftnlen)sizeof(integer));
                        do_fio(&c__1, (char *)&result[k - 1], (ftnlen)sizeof(
                                real));
                        e_wsfe();
                        ++nfail;
                    }
/* L50: */
                }
                nrun += 3;
L60:
                ;
            }
/* L70: */
        }
/* L80: */
    }

/*     Print a summary of the results. */

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


/*     End of SCHKQP */

    return 0;
} /* schkqp_ */