#include "blaswrap.h"
/*  -- translated by f2c (version 19990503).
   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__3 = 3;

/* Subroutine */ int dlatb9_(char *path, integer *imat, integer *m, integer *
	p, integer *n, char *type__, integer *kla, integer *kua, integer *klb,
	 integer *kub, doublereal *anorm, doublereal *bnorm, integer *modea, 
	integer *modeb, doublereal *cndnma, doublereal *cndnmb, char *dista, 
	char *distb)
{
    /* Initialized data */

    static logical first = TRUE_;

    /* System generated locals */
    integer i__1;

    /* Builtin functions */
    double sqrt(doublereal);

    /* Local variables */
    static doublereal badc1, badc2, large, small;
    extern /* Subroutine */ int dlabad_(doublereal *, doublereal *);
    extern doublereal dlamch_(char *);
    extern logical lsamen_(integer *, char *, char *);
    static doublereal eps;


/*  -- LAPACK test routine (version 3.0) --   
       Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd.,   
       Courant Institute, Argonne National Lab, and Rice University   
       March 31, 1993   


    Purpose   
    =======   

    DLATB9 sets parameters for the matrix generator based on the type of   
    matrix to be generated.   

    Arguments   
    =========   

    PATH    (input) CHARACTER*3   
            The LAPACK path name.   

    IMAT    (input) INTEGER   
            An integer key describing which matrix to generate for this   
            path.   

    M       (input) INTEGER   
            The number of rows in the matrix to be generated.   

    N       (input) INTEGER   
            The number of columns in the matrix to be generated.   

    TYPE    (output) CHARACTER*1   
            The type of the matrix to be generated:   
            = 'S':  symmetric matrix;   
            = 'P':  symmetric positive (semi)definite matrix;   
            = 'N':  nonsymmetric matrix.   

    KL      (output) INTEGER   
            The lower band width of the matrix to be generated.   

    KU      (output) INTEGER   
            The upper band width of the matrix to be generated.   

    ANORM   (output) DOUBLE PRECISION   
            The desired norm of the matrix to be generated.  The diagonal   
            matrix of singular values or eigenvalues is scaled by this   
            value.   

    MODE    (output) INTEGER   
            A key indicating how to choose the vector of eigenvalues.   

    CNDNUM  (output) DOUBLE PRECISION   
            The desired condition number.   

    DIST    (output) CHARACTER*1   
            The type of distribution to be used by the random number   
            generator.   

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


       Set some constants for use in the subroutine. */

    if (first) {
	first = FALSE_;
	eps = dlamch_("Precision");
	badc2 = .1 / eps;
	badc1 = sqrt(badc2);
	small = dlamch_("Safe minimum");
	large = 1. / small;

/*        If it looks like we're on a Cray, take the square root of   
          SMALL and LARGE to avoid overflow and underflow problems. */

	dlabad_(&small, &large);
	small = small / eps * .25;
	large = 1. / small;
    }

/*     Set some parameters we don't plan to change. */

    *(unsigned char *)type__ = 'N';
    *(unsigned char *)dista = 'S';
    *(unsigned char *)distb = 'S';
    *modea = 3;
    *modeb = 4;

/*     Set the lower and upper bandwidths. */

    if (lsamen_(&c__3, path, "GRQ") || lsamen_(&c__3, 
	    path, "LSE") || lsamen_(&c__3, path, "GSV")) {

/*        A: M by N, B: P by N */

	if (*imat == 1) {

/*           A: diagonal, B: upper triangular */

	    *kla = 0;
	    *kua = 0;
	    *klb = 0;
/* Computing MAX */
	    i__1 = *n - 1;
	    *kub = max(i__1,0);

	} else if (*imat == 2) {

/*           A: upper triangular, B: upper triangular */

	    *kla = 0;
/* Computing MAX */
	    i__1 = *n - 1;
	    *kua = max(i__1,0);
	    *klb = 0;
/* Computing MAX */
	    i__1 = *n - 1;
	    *kub = max(i__1,0);

	} else if (*imat == 3) {

/*           A: lower triangular, B: upper triangular   

   Computing MAX */
	    i__1 = *m - 1;
	    *kla = max(i__1,0);
	    *kua = 0;
	    *klb = 0;
/* Computing MAX */
	    i__1 = *n - 1;
	    *kub = max(i__1,0);

	} else {

/*           A: general dense, B: general dense   

   Computing MAX */
	    i__1 = *m - 1;
	    *kla = max(i__1,0);
/* Computing MAX */
	    i__1 = *n - 1;
	    *kua = max(i__1,0);
/* Computing MAX */
	    i__1 = *p - 1;
	    *klb = max(i__1,0);
/* Computing MAX */
	    i__1 = *n - 1;
	    *kub = max(i__1,0);

	}

    } else if (lsamen_(&c__3, path, "GQR") || lsamen_(&
	    c__3, path, "GLM")) {

/*        A: N by M, B: N by P */

	if (*imat == 1) {

/*           A: diagonal, B: lower triangular */

	    *kla = 0;
	    *kua = 0;
/* Computing MAX */
	    i__1 = *n - 1;
	    *klb = max(i__1,0);
	    *kub = 0;
	} else if (*imat == 2) {

/*           A: lower triangular, B: diagonal   

   Computing MAX */
	    i__1 = *n - 1;
	    *kla = max(i__1,0);
	    *kua = 0;
	    *klb = 0;
	    *kub = 0;

	} else if (*imat == 3) {

/*           A: lower triangular, B: upper triangular   

   Computing MAX */
	    i__1 = *n - 1;
	    *kla = max(i__1,0);
	    *kua = 0;
	    *klb = 0;
/* Computing MAX */
	    i__1 = *p - 1;
	    *kub = max(i__1,0);

	} else {

/*           A: general dense, B: general dense   

   Computing MAX */
	    i__1 = *n - 1;
	    *kla = max(i__1,0);
/* Computing MAX */
	    i__1 = *m - 1;
	    *kua = max(i__1,0);
/* Computing MAX */
	    i__1 = *n - 1;
	    *klb = max(i__1,0);
/* Computing MAX */
	    i__1 = *p - 1;
	    *kub = max(i__1,0);
	}

    }

/*     Set the condition number and norm. */

    *cndnma = 100.;
    *cndnmb = 10.;
    if (lsamen_(&c__3, path, "GQR") || lsamen_(&c__3, 
	    path, "GRQ") || lsamen_(&c__3, path, "GSV")) {
	if (*imat == 5) {
	    *cndnma = badc1;
	    *cndnmb = badc1;
	} else if (*imat == 6) {
	    *cndnma = badc2;
	    *cndnmb = badc2;
	} else if (*imat == 7) {
	    *cndnma = badc1;
	    *cndnmb = badc2;
	} else if (*imat == 8) {
	    *cndnma = badc2;
	    *cndnmb = badc1;
	}
    }

    *anorm = 10.;
    *bnorm = 1e3;
    if (lsamen_(&c__3, path, "GQR") || lsamen_(&c__3, 
	    path, "GRQ")) {
	if (*imat == 7) {
	    *anorm = small;
	    *bnorm = large;
	} else if (*imat == 8) {
	    *anorm = large;
	    *bnorm = small;
	}
    }

    if (*n <= 1) {
	*cndnma = 1.;
	*cndnmb = 1.;
    }

    return 0;

/*     End of DLATB9 */

} /* dlatb9_ */


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