/*  -- translated by f2c (version 19940927).

   You must link the resulting object file with the libraries:

	-lf2c -lm   (in that order)

*/

#include "f2c.h"

/* Table of constant values */

static integer c__1 = 1;

static real c_b23 = 0.f;

static integer c__0 = 0;

static real c_b39 = 1.f;

/* Subroutine */ int slatme_(integer *n, char *dist, integer *iseed, real *d, 

	integer *mode, real *cond, real *dmax__, char *ei, char *rsign, char *

	upper, char *sim, real *ds, integer *modes, real *conds, integer *kl, 

	integer *ku, real *anorm, real *a, integer *lda, real *work, integer *

	info)

{

    /* System generated locals */

    integer a_dim1, a_offset, i__1, i__2;

    real r__1, r__2, r__3;

    /* Local variables */

    static logical bads;

    extern /* Subroutine */ int sger_(integer *, integer *, real *, real *, 

	    integer *, real *, integer *, real *, integer *);

    static integer isim;

    static real temp;

    static logical badei;

    static integer i, j;

    static real alpha;

    extern logical lsame_(char *, char *);

    static integer iinfo;

    extern /* Subroutine */ int sscal_(integer *, real *, real *, integer *);

    static real tempa[1];

    static integer icols;

    static logical useei;

    static integer idist;

    extern /* Subroutine */ int sgemv_(char *, integer *, integer *, real *, 

	    real *, integer *, real *, integer *, real *, real *, integer *), scopy_(integer *, real *, integer *, real *, integer *);

    static integer irows;

    extern /* Subroutine */ int slatm1_(integer *, real *, integer *, integer 

	    *, integer *, real *, integer *, integer *);

    static integer ic, jc, ir, jr;

    extern doublereal slange_(char *, integer *, integer *, real *, integer *,

	     real *);

    extern /* Subroutine */ int slarge_(integer *, real *, integer *, integer 

	    *, real *, integer *), slarfg_(integer *, real *, real *, integer 

	    *, real *), xerbla_(char *, integer *);

    extern doublereal slaran_(integer *);

    static integer irsign;

    extern /* Subroutine */ int slaset_(char *, integer *, integer *, real *, 

	    real *, real *, integer *);

    static integer iupper;

    extern /* Subroutine */ int slarnv_(integer *, integer *, integer *, real 

	    *);

    static real xnorms;

    static integer jcr;

    static real tau;

/*  -- LAPACK test routine (version 2.0) --   

       Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd.,   

       Courant Institute, Argonne National Lab, and Rice University   

       September 30, 1994   

    Purpose   

    =======   

       SLATME generates random non-symmetric square matrices with   

       specified eigenvalues for testing LAPACK programs.   

       SLATME operates by applying the following sequence of   

       operations:   

       1. Set the diagonal to D, where D may be input or   

            computed according to MODE, COND, DMAX, and RSIGN   

            as described below.   

       2. If complex conjugate pairs are desired (MODE=0 and EI(1)='R',   

            or MODE=5), certain pairs of adjacent elements of D are   

            interpreted as the real and complex parts of a complex   

            conjugate pair; A thus becomes block diagonal, with 1x1   

            and 2x2 blocks.   

       3. If UPPER='T', the upper triangle of A is set to random values   

            out of distribution DIST.   

       4. If SIM='T', A is multiplied on the left by a random matrix   

            X, whose singular values are specified by DS, MODES, and   

            CONDS, and on the right by X inverse.   

       5. If KL < N-1, the lower bandwidth is reduced to KL using   

            Householder transformations.  If KU < N-1, the upper   

            bandwidth is reduced to KU.   

       6. If ANORM is not negative, the matrix is scaled to have   

            maximum-element-norm ANORM.   

       (Note: since the matrix cannot be reduced beyond Hessenberg form, 

        no packing options are available.)   

    Arguments   

    =========   

    N      - INTEGER   

             The number of columns (or rows) of A. Not modified.   

    DIST   - CHARACTER*1   

             On entry, DIST specifies the type of distribution to be used 

             to generate the random eigen-/singular values, and for the   

             upper triangle (see UPPER).   

             'U' => UNIFORM( 0, 1 )  ( 'U' for uniform )   

             'S' => UNIFORM( -1, 1 ) ( 'S' for symmetric )   

             'N' => NORMAL( 0, 1 )   ( 'N' for normal )   

             Not modified.   

    ISEED  - INTEGER array, dimension ( 4 )   

             On entry ISEED specifies the seed of the random number   

             generator. They should lie between 0 and 4095 inclusive,   

             and ISEED(4) should be odd. The random number generator   

             uses a linear congruential sequence limited to small   

             integers, and so should produce machine independent   

             random numbers. The values of ISEED are changed on   

             exit, and can be used in the next call to SLATME   

             to continue the same random number sequence.   

             Changed on exit.   

    D      - REAL array, dimension ( N )   

             This array is used to specify the eigenvalues of A.  If   

             MODE=0, then D is assumed to contain the eigenvalues (but   

             see the description of EI), otherwise they will be   

             computed according to MODE, COND, DMAX, and RSIGN and   

             placed in D.   

             Modified if MODE is nonzero.   

    MODE   - INTEGER   

             On entry this describes how the eigenvalues are to   

             be specified:   

             MODE = 0 means use D (with EI) as input   

             MODE = 1 sets D(1)=1 and D(2:N)=1.0/COND   

             MODE = 2 sets D(1:N-1)=1 and D(N)=1.0/COND   

             MODE = 3 sets D(I)=COND**(-(I-1)/(N-1))   

             MODE = 4 sets D(i)=1 - (i-1)/(N-1)*(1 - 1/COND)   

             MODE = 5 sets D to random numbers in the range   

                      ( 1/COND , 1 ) such that their logarithms   

                      are uniformly distributed.  Each odd-even pair   

                      of elements will be either used as two real   

                      eigenvalues or as the real and imaginary part   

                      of a complex conjugate pair of eigenvalues;   

                      the choice of which is done is random, with   

                      50-50 probability, for each pair.   

             MODE = 6 set D to random numbers from same distribution   

                      as the rest of the matrix.   

             MODE < 0 has the same meaning as ABS(MODE), except that   

                the order of the elements of D is reversed.   

             Thus if MODE is between 1 and 4, D has entries ranging   

                from 1 to 1/COND, if between -1 and -4, D has entries   

                ranging from 1/COND to 1,   

             Not modified.   

    COND   - REAL   

             On entry, this is used as described under MODE above.   

             If used, it must be >= 1. Not modified.   

    DMAX   - REAL   

             If MODE is neither -6, 0 nor 6, the contents of D, as   

             computed according to MODE and COND, will be scaled by   

             DMAX / max(abs(D(i))).  Note that DMAX need not be   

             positive: if DMAX is negative (or zero), D will be   

             scaled by a negative number (or zero).   

             Not modified.   

    EI     - CHARACTER*1 array, dimension ( N )   

             If MODE is 0, and EI(1) is not ' ' (space character),   

             this array specifies which elements of D (on input) are   

             real eigenvalues and which are the real and imaginary parts 

             of a complex conjugate pair of eigenvalues.  The elements   

             of EI may then only have the values 'R' and 'I'.  If   

             EI(j)='R' and EI(j+1)='I', then the j-th eigenvalue is   

             CMPLX( D(j) , D(j+1) ), and the (j+1)-th is the complex   

             conjugate thereof.  If EI(j)=EI(j+1)='R', then the j-th   

             eigenvalue is D(j) (i.e., real).  EI(1) may not be 'I',   

             nor may two adjacent elements of EI both have the value 'I'. 

             If MODE is not 0, then EI is ignored.  If MODE is 0 and   

             EI(1)=' ', then the eigenvalues will all be real.   

             Not modified.   

    RSIGN  - CHARACTER*1   

             If MODE is not 0, 6, or -6, and RSIGN='T', then the   

             elements of D, as computed according to MODE and COND, will 

             be multiplied by a random sign (+1 or -1).  If RSIGN='F',   

             they will not be.  RSIGN may only have the values 'T' or   

             'F'.   

             Not modified.   

    UPPER  - CHARACTER*1   

             If UPPER='T', then the elements of A above the diagonal   

             (and above the 2x2 diagonal blocks, if A has complex   

             eigenvalues) will be set to random numbers out of DIST.   

             If UPPER='F', they will not.  UPPER may only have the   

             values 'T' or 'F'.   

             Not modified.   

    SIM    - CHARACTER*1   

             If SIM='T', then A will be operated on by a "similarity   

             transform", i.e., multiplied on the left by a matrix X and   

             on the right by X inverse.  X = U S V, where U and V are   

             random unitary matrices and S is a (diagonal) matrix of   

             singular values specified by DS, MODES, and CONDS.  If   

             SIM='F', then A will not be transformed.   

             Not modified.   

    DS     - REAL array, dimension ( N )   

             This array is used to specify the singular values of X,   

             in the same way that D specifies the eigenvalues of A.   

             If MODE=0, the DS contains the singular values, which   

             may not be zero.   

             Modified if MODE is nonzero.   

    MODES  - INTEGER   

    CONDS  - REAL   

             Same as MODE and COND, but for specifying the diagonal   

             of S.  MODES=-6 and +6 are not allowed (since they would   

             result in randomly ill-conditioned eigenvalues.)   

    KL     - INTEGER   

             This specifies the lower bandwidth of the  matrix.  KL=1   

             specifies upper Hessenberg form.  If KL is at least N-1,   

             then A will have full lower bandwidth.  KL must be at   

             least 1.   

             Not modified.   

    KU     - INTEGER   

             This specifies the upper bandwidth of the  matrix.  KU=1   

             specifies lower Hessenberg form.  If KU is at least N-1,   

             then A will have full upper bandwidth; if KU and KL   

             are both at least N-1, then A will be dense.  Only one of   

             KU and KL may be less than N-1.  KU must be at least 1.   

             Not modified.   

    ANORM  - REAL   

             If ANORM is not negative, then A will be scaled by a non-   

             negative real number to make the maximum-element-norm of A   

             to be ANORM.   

             Not modified.   

    A      - REAL array, dimension ( LDA, N )   

             On exit A is the desired test matrix.   

             Modified.   

    LDA    - INTEGER   

             LDA specifies the first dimension of A as declared in the   

             calling program.  LDA must be at least N.   

             Not modified.   

    WORK   - REAL array, dimension ( 3*N )   

             Workspace.   

             Modified.   

    INFO   - INTEGER   

             Error code.  On exit, INFO will be set to one of the   

             following values:   

               0 => normal return   

              -1 => N negative   

              -2 => DIST illegal string   

              -5 => MODE not in range -6 to 6   

              -6 => COND less than 1.0, and MODE neither -6, 0 nor 6   

              -8 => EI(1) is not ' ' or 'R', EI(j) is not 'R' or 'I', or 

                    two adjacent elements of EI are 'I'.   

              -9 => RSIGN is not 'T' or 'F'   

             -10 => UPPER is not 'T' or 'F'   

             -11 => SIM   is not 'T' or 'F'   

             -12 => MODES=0 and DS has a zero singular value.   

             -13 => MODES is not in the range -5 to 5.   

             -14 => MODES is nonzero and CONDS is less than 1.   

             -15 => KL is less than 1.   

             -16 => KU is less than 1, or KL and KU are both less than   

                    N-1.   

             -19 => LDA is less than N.   

              1  => Error return from SLATM1 (computing D)   

              2  => Cannot scale to DMAX (max. eigenvalue is 0)   

              3  => Error return from SLATM1 (computing DS)   

              4  => Error return from SLARGE   

              5  => Zero singular value from SLATM1.   

    ===================================================================== 

       1)      Decode and Test the input parameters.   

               Initialize flags & seed.   

       Parameter adjustments */

    --iseed;

    --d;

    --ei;

    --ds;

    a_dim1 = *lda;

    a_offset = a_dim1 + 1;

    a -= a_offset;

    --work;

    /* Function Body */

    *info = 0;

/*     Quick return if possible */

    if (*n == 0) {

	return 0;

    }

/*     Decode DIST */

    if (lsame_(dist, "U")) {

	idist = 1;

    } else if (lsame_(dist, "S")) {

	idist = 2;

    } else if (lsame_(dist, "N")) {

	idist = 3;

    } else {

	idist = -1;

    }

/*     Check EI */

    useei = TRUE_;

    badei = FALSE_;

    if (lsame_(ei + 1, " ") || *mode != 0) {

	useei = FALSE_;

    } else {

	if (lsame_(ei + 1, "R")) {

	    i__1 = *n;

	    for (j = 2; j <= i__1; ++j) {

		if (lsame_(ei + j, "I")) {

		    if (lsame_(ei + (j - 1), "I")) {

			badei = TRUE_;

		    }

		} else {

		    if (! lsame_(ei + j, "R")) {

			badei = TRUE_;

		    }

		}

/* L10: */

	    }

	} else {

	    badei = TRUE_;

	}

    }

/*     Decode RSIGN */

    if (lsame_(rsign, "T")) {

	irsign = 1;

    } else if (lsame_(rsign, "F")) {

	irsign = 0;

    } else {

	irsign = -1;

    }

/*     Decode UPPER */

    if (lsame_(upper, "T")) {

	iupper = 1;

    } else if (lsame_(upper, "F")) {

	iupper = 0;

    } else {

	iupper = -1;

    }

/*     Decode SIM */

    if (lsame_(sim, "T")) {

	isim = 1;

    } else if (lsame_(sim, "F")) {

	isim = 0;

    } else {

	isim = -1;

    }

/*     Check DS, if MODES=0 and ISIM=1 */

    bads = FALSE_;

    if (*modes == 0 && isim == 1) {

	i__1 = *n;

	for (j = 1; j <= i__1; ++j) {

	    if (ds[j] == 0.f) {

		bads = TRUE_;

	    }

/* L20: */

	}

    }

/*     Set INFO if an error */

    if (*n < 0) {

	*info = -1;

    } else if (idist == -1) {

	*info = -2;

    } else if (abs(*mode) > 6) {

	*info = -5;

    } else if (*mode != 0 && abs(*mode) != 6 && *cond < 1.f) {

	*info = -6;

    } else if (badei) {

	*info = -8;

    } else if (irsign == -1) {

	*info = -9;

    } else if (iupper == -1) {

	*info = -10;

    } else if (isim == -1) {

	*info = -11;

    } else if (bads) {

	*info = -12;

    } else if (isim == 1 && abs(*modes) > 5) {

	*info = -13;

    } else if (isim == 1 && *modes != 0 && *conds < 1.f) {

	*info = -14;

    } else if (*kl < 1) {

	*info = -15;

    } else if (*ku < 1 || *ku < *n - 1 && *kl < *n - 1) {

	*info = -16;

    } else if (*lda < max(1,*n)) {

	*info = -19;

    }

    if (*info != 0) {

	i__1 = -(*info);

	xerbla_("SLATME", &i__1);

	return 0;

    }

/*     Initialize random number generator */

    for (i = 1; i <= 4; ++i) {

	iseed[i] = (i__1 = iseed[i], abs(i__1)) % 4096;

/* L30: */

    }

    if (iseed[4] % 2 != 1) {

	++iseed[4];

    }

/*     2)      Set up diagonal of A   

               Compute D according to COND and MODE */

    slatm1_(mode, cond, &irsign, &idist, &iseed[1], &d[1], n, &iinfo);

    if (iinfo != 0) {

	*info = 1;

	return 0;

    }

    if (*mode != 0 && abs(*mode) != 6) {

/*        Scale by DMAX */

	temp = dabs(d[1]);

	i__1 = *n;

	for (i = 2; i <= i__1; ++i) {

/* Computing MAX */

	    r__2 = temp, r__3 = (r__1 = d[i], dabs(r__1));

	    temp = dmax(r__2,r__3);

/* L40: */

	}

	if (temp > 0.f) {

	    alpha = *dmax__ / temp;

	} else if (*dmax__ != 0.f) {

	    *info = 2;

	    return 0;

	} else {

	    alpha = 0.f;

	}

	sscal_(n, &alpha, &d[1], &c__1);

    }

    slaset_("Full", n, n, &c_b23, &c_b23, &a[a_offset], lda);

    i__1 = *lda + 1;

    scopy_(n, &d[1], &c__1, &a[a_offset], &i__1);

/*     Set up complex conjugate pairs */

    if (*mode == 0) {

	if (useei) {

	    i__1 = *n;

	    for (j = 2; j <= i__1; ++j) {

		if (lsame_(ei + j, "I")) {

		    a[j - 1 + j * a_dim1] = a[j + j * a_dim1];

		    a[j + (j - 1) * a_dim1] = -(doublereal)a[j + j * a_dim1];

		    a[j + j * a_dim1] = a[j - 1 + (j - 1) * a_dim1];

		}

/* L50: */

	    }

	}

    } else if (abs(*mode) == 5) {

	i__1 = *n;

	for (j = 2; j <= i__1; j += 2) {

	    if (slaran_(&iseed[1]) > .5f) {

		a[j - 1 + j * a_dim1] = a[j + j * a_dim1];

		a[j + (j - 1) * a_dim1] = -(doublereal)a[j + j * a_dim1];

		a[j + j * a_dim1] = a[j - 1 + (j - 1) * a_dim1];

	    }

/* L60: */

	}

    }

/*     3)      If UPPER='T', set upper triangle of A to random numbers.   

               (but don't modify the corners of 2x2 blocks.) */

    if (iupper != 0) {

	i__1 = *n;

	for (jc = 2; jc <= i__1; ++jc) {

	    if (a[jc - 1 + jc * a_dim1] != 0.f) {

		jr = jc - 2;

	    } else {

		jr = jc - 1;

	    }

	    slarnv_(&idist, &iseed[1], &jr, &a[jc * a_dim1 + 1]);

/* L70: */

	}

    }

/*     4)      If SIM='T', apply similarity transformation.   

                                  -1   

               Transform is  X A X  , where X = U S V, thus   

               it is  U S V A V' (1/S) U' */

    if (isim != 0) {

/*        Compute S (singular values of the eigenvector matrix)   

          according to CONDS and MODES */

	slatm1_(modes, conds, &c__0, &c__0, &iseed[1], &ds[1], n, &iinfo);

	if (iinfo != 0) {

	    *info = 3;

	    return 0;

	}

/*        Multiply by V and V' */

	slarge_(n, &a[a_offset], lda, &iseed[1], &work[1], &iinfo);

	if (iinfo != 0) {

	    *info = 4;

	    return 0;

	}

/*        Multiply by S and (1/S) */

	i__1 = *n;

	for (j = 1; j <= i__1; ++j) {

	    sscal_(n, &ds[j], &a[j + a_dim1], lda);

	    if (ds[j] != 0.f) {

		r__1 = 1.f / ds[j];

		sscal_(n, &r__1, &a[j * a_dim1 + 1], &c__1);

	    } else {

		*info = 5;

		return 0;

	    }

/* L80: */

	}

/*        Multiply by U and U' */

	slarge_(n, &a[a_offset], lda, &iseed[1], &work[1], &iinfo);

	if (iinfo != 0) {

	    *info = 4;

	    return 0;

	}

    }

/*     5)      Reduce the bandwidth. */

    if (*kl < *n - 1) {

/*        Reduce bandwidth -- kill column */

	i__1 = *n - 1;

	for (jcr = *kl + 1; jcr <= i__1; ++jcr) {

	    ic = jcr - *kl;

	    irows = *n + 1 - jcr;

	    icols = *n + *kl - jcr;

	    scopy_(&irows, &a[jcr + ic * a_dim1], &c__1, &work[1], &c__1);

	    xnorms = work[1];

	    slarfg_(&irows, &xnorms, &work[2], &c__1, &tau);

	    work[1] = 1.f;

	    sgemv_("T", &irows, &icols, &c_b39, &a[jcr + (ic + 1) * a_dim1], 

		    lda, &work[1], &c__1, &c_b23, &work[irows + 1], &c__1)

		    ;

	    r__1 = -(doublereal)tau;

	    sger_(&irows, &icols, &r__1, &work[1], &c__1, &work[irows + 1], &

		    c__1, &a[jcr + (ic + 1) * a_dim1], lda);

	    sgemv_("N", n, &irows, &c_b39, &a[jcr * a_dim1 + 1], lda, &work[1]

		    , &c__1, &c_b23, &work[irows + 1], &c__1);

	    r__1 = -(doublereal)tau;

	    sger_(n, &irows, &r__1, &work[irows + 1], &c__1, &work[1], &c__1, 

		    &a[jcr * a_dim1 + 1], lda);

	    a[jcr + ic * a_dim1] = xnorms;

	    i__2 = irows - 1;

	    slaset_("Full", &i__2, &c__1, &c_b23, &c_b23, &a[jcr + 1 + ic * 

		    a_dim1], lda);

/* L90: */

	}

    } else if (*ku < *n - 1) {

/*        Reduce upper bandwidth -- kill a row at a time. */

	i__1 = *n - 1;

	for (jcr = *ku + 1; jcr <= i__1; ++jcr) {

	    ir = jcr - *ku;

	    irows = *n + *ku - jcr;

	    icols = *n + 1 - jcr;

	    scopy_(&icols, &a[ir + jcr * a_dim1], lda, &work[1], &c__1);

	    xnorms = work[1];

	    slarfg_(&icols, &xnorms, &work[2], &c__1, &tau);

	    work[1] = 1.f;

	    sgemv_("N", &irows, &icols, &c_b39, &a[ir + 1 + jcr * a_dim1], 

		    lda, &work[1], &c__1, &c_b23, &work[icols + 1], &c__1)

		    ;

	    r__1 = -(doublereal)tau;

	    sger_(&irows, &icols, &r__1, &work[icols + 1], &c__1, &work[1], &

		    c__1, &a[ir + 1 + jcr * a_dim1], lda);

	    sgemv_("C", &icols, n, &c_b39, &a[jcr + a_dim1], lda, &work[1], &

		    c__1, &c_b23, &work[icols + 1], &c__1);

	    r__1 = -(doublereal)tau;

	    sger_(&icols, n, &r__1, &work[1], &c__1, &work[icols + 1], &c__1, 

		    &a[jcr + a_dim1], lda);

	    a[ir + jcr * a_dim1] = xnorms;

	    i__2 = icols - 1;

	    slaset_("Full", &c__1, &i__2, &c_b23, &c_b23, &a[ir + (jcr + 1) * 

		    a_dim1], lda);

/* L100: */

	}

    }

/*     Scale the matrix to have norm ANORM */

    if (*anorm >= 0.f) {

	temp = slange_("M", n, n, &a[a_offset], lda, tempa);

	if (temp > 0.f) {

	    alpha = *anorm / temp;

	    i__1 = *n;

	    for (j = 1; j <= i__1; ++j) {

		sscal_(n, &alpha, &a[j * a_dim1 + 1], &c__1);

/* L110: */

	    }

	}

    }

    return 0;

/*     End of SLATME */

} /* slatme_ */