OpenBLAS/lapack-netlib/SRC/dsyconvf.c

/* f2c.h  --  Standard Fortran to C header file */

/**  barf  [ba:rf]  2.  "He suggested using FORTRAN, and everybody barfed."

	- From The Shogakukan DICTIONARY OF NEW ENGLISH (Second edition) */

#ifndef F2C_INCLUDE
#define F2C_INCLUDE

#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <complex.h>
#ifdef complex
#undef complex
#endif
#ifdef I
#undef I
#endif

typedef int integer;
typedef unsigned int uinteger;
typedef char *address;
typedef short int shortint;
typedef float real;
typedef double doublereal;
typedef struct { real r, i; } complex;
typedef struct { doublereal r, i; } doublecomplex;
static inline _Complex float Cf(complex *z) {return z->r + z->i*_Complex_I;}
static inline _Complex double Cd(doublecomplex *z) {return z->r + z->i*_Complex_I;}
static inline _Complex float * _pCf(complex *z) {return (_Complex float*)z;}
static inline _Complex double * _pCd(doublecomplex *z) {return (_Complex double*)z;}
#define pCf(z) (*_pCf(z))
#define pCd(z) (*_pCd(z))
typedef int logical;
typedef short int shortlogical;
typedef char logical1;
typedef char integer1;

#define TRUE_ (1)
#define FALSE_ (0)

/* Extern is for use with -E */
#ifndef Extern
#define Extern extern
#endif

/* I/O stuff */

typedef int flag;
typedef int ftnlen;
typedef int ftnint;

/*external read, write*/
typedef struct
{	flag cierr;
	ftnint ciunit;
	flag ciend;
	char *cifmt;
	ftnint cirec;
} cilist;

/*internal read, write*/
typedef struct
{	flag icierr;
	char *iciunit;
	flag iciend;
	char *icifmt;
	ftnint icirlen;
	ftnint icirnum;
} icilist;

/*open*/
typedef struct
{	flag oerr;
	ftnint ounit;
	char *ofnm;
	ftnlen ofnmlen;
	char *osta;
	char *oacc;
	char *ofm;
	ftnint orl;
	char *oblnk;
} olist;

/*close*/
typedef struct
{	flag cerr;
	ftnint cunit;
	char *csta;
} cllist;

/*rewind, backspace, endfile*/
typedef struct
{	flag aerr;
	ftnint aunit;
} alist;

/* inquire */
typedef struct
{	flag inerr;
	ftnint inunit;
	char *infile;
	ftnlen infilen;
	ftnint	*inex;	/*parameters in standard's order*/
	ftnint	*inopen;
	ftnint	*innum;
	ftnint	*innamed;
	char	*inname;
	ftnlen	innamlen;
	char	*inacc;
	ftnlen	inacclen;
	char	*inseq;
	ftnlen	inseqlen;
	char 	*indir;
	ftnlen	indirlen;
	char	*infmt;
	ftnlen	infmtlen;
	char	*inform;
	ftnint	informlen;
	char	*inunf;
	ftnlen	inunflen;
	ftnint	*inrecl;
	ftnint	*innrec;
	char	*inblank;
	ftnlen	inblanklen;
} inlist;

#define VOID void

union Multitype {	/* for multiple entry points */
	integer1 g;
	shortint h;
	integer i;
	/* longint j; */
	real r;
	doublereal d;
	complex c;
	doublecomplex z;
	};

typedef union Multitype Multitype;

struct Vardesc {	/* for Namelist */
	char *name;
	char *addr;
	ftnlen *dims;
	int  type;
	};
typedef struct Vardesc Vardesc;

struct Namelist {
	char *name;
	Vardesc **vars;
	int nvars;
	};
typedef struct Namelist Namelist;

#define abs(x) ((x) >= 0 ? (x) : -(x))
#define dabs(x) (fabs(x))
#define f2cmin(a,b) ((a) <= (b) ? (a) : (b))
#define f2cmax(a,b) ((a) >= (b) ? (a) : (b))
#define dmin(a,b) (f2cmin(a,b))
#define dmax(a,b) (f2cmax(a,b))
#define bit_test(a,b)	((a) >> (b) & 1)
#define bit_clear(a,b)	((a) & ~((uinteger)1 << (b)))
#define bit_set(a,b)	((a) |  ((uinteger)1 << (b)))

#define abort_() { sig_die("Fortran abort routine called", 1); }
#define c_abs(z) (cabsf(Cf(z)))
#define c_cos(R,Z) { pCf(R)=ccos(Cf(Z)); }
#define c_div(c, a, b) {pCf(c) = Cf(a)/Cf(b);}
#define z_div(c, a, b) {pCd(c) = Cd(a)/Cd(b);}
#define c_exp(R, Z) {pCf(R) = cexpf(Cf(Z));}
#define c_log(R, Z) {pCf(R) = clogf(Cf(Z));}
#define c_sin(R, Z) {pCf(R) = csinf(Cf(Z));}
//#define c_sqrt(R, Z) {*(R) = csqrtf(Cf(Z));}
#define c_sqrt(R, Z) {pCf(R) = csqrtf(Cf(Z));}
#define d_abs(x) (fabs(*(x)))
#define d_acos(x) (acos(*(x)))
#define d_asin(x) (asin(*(x)))
#define d_atan(x) (atan(*(x)))
#define d_atn2(x, y) (atan2(*(x),*(y)))
#define d_cnjg(R, Z) { pCd(R) = conj(Cd(Z)); }
#define r_cnjg(R, Z) { pCf(R) = conj(Cf(Z)); }
#define d_cos(x) (cos(*(x)))
#define d_cosh(x) (cosh(*(x)))
#define d_dim(__a, __b) ( *(__a) > *(__b) ? *(__a) - *(__b) : 0.0 )
#define d_exp(x) (exp(*(x)))
#define d_imag(z) (cimag(Cd(z)))
#define r_imag(z) (cimag(Cf(z)))
#define d_int(__x) (*(__x)>0 ? floor(*(__x)) : -floor(- *(__x)))
#define r_int(__x) (*(__x)>0 ? floor(*(__x)) : -floor(- *(__x)))
#define d_lg10(x) ( 0.43429448190325182765 * log(*(x)) )
#define r_lg10(x) ( 0.43429448190325182765 * log(*(x)) )
#define d_log(x) (log(*(x)))
#define d_mod(x, y) (fmod(*(x), *(y)))
#define u_nint(__x) ((__x)>=0 ? floor((__x) + .5) : -floor(.5 - (__x)))
#define d_nint(x) u_nint(*(x))
#define u_sign(__a,__b) ((__b) >= 0 ? ((__a) >= 0 ? (__a) : -(__a)) : -((__a) >= 0 ? (__a) : -(__a)))
#define d_sign(a,b) u_sign(*(a),*(b))
#define r_sign(a,b) u_sign(*(a),*(b))
#define d_sin(x) (sin(*(x)))
#define d_sinh(x) (sinh(*(x)))
#define d_sqrt(x) (sqrt(*(x)))
#define d_tan(x) (tan(*(x)))
#define d_tanh(x) (tanh(*(x)))
#define i_abs(x) abs(*(x))
#define i_dnnt(x) ((integer)u_nint(*(x)))
#define i_len(s, n) (n)
#define i_nint(x) ((integer)u_nint(*(x)))
#define i_sign(a,b) ((integer)u_sign((integer)*(a),(integer)*(b)))
#define pow_dd(ap, bp) ( pow(*(ap), *(bp)))
#define pow_si(B,E) spow_ui(*(B),*(E))
#define pow_ri(B,E) spow_ui(*(B),*(E))
#define pow_di(B,E) dpow_ui(*(B),*(E))
#define pow_zi(p, a, b) {pCd(p) = zpow_ui(Cd(a), *(b));}
#define pow_ci(p, a, b) {pCf(p) = cpow_ui(Cf(a), *(b));}
#define pow_zz(R,A,B) {pCd(R) = cpow(Cd(A),*(B));}
#define s_cat(lpp, rpp, rnp, np, llp) { 	ftnlen i, nc, ll; char *f__rp, *lp; 	ll = (llp); lp = (lpp); 	for(i=0; i < (int)*(np); ++i) {         	nc = ll; 	        if((rnp)[i] < nc) nc = (rnp)[i]; 	        ll -= nc;         	f__rp = (rpp)[i]; 	        while(--nc >= 0) *lp++ = *(f__rp)++;         } 	while(--ll >= 0) *lp++ = ' '; }
#define s_cmp(a,b,c,d) ((integer)strncmp((a),(b),f2cmin((c),(d))))
#define s_copy(A,B,C,D) { int __i,__m; for (__i=0, __m=f2cmin((C),(D)); __i<__m && (B)[__i] != 0; ++__i) (A)[__i] = (B)[__i]; }
#define sig_die(s, kill) { exit(1); }
#define s_stop(s, n) {exit(0);}
static char junk[] = "\n@(#)LIBF77 VERSION 19990503\n";
#define z_abs(z) (cabs(Cd(z)))
#define z_exp(R, Z) {pCd(R) = cexp(Cd(Z));}
#define z_sqrt(R, Z) {pCd(R) = csqrt(Cd(Z));}
#define myexit_() break;
#define mycycle() continue;
#define myceiling(w) {ceil(w)}
#define myhuge(w) {HUGE_VAL}
//#define mymaxloc_(w,s,e,n) {if (sizeof(*(w)) == sizeof(double)) dmaxloc_((w),*(s),*(e),n); else dmaxloc_((w),*(s),*(e),n);}
#define mymaxloc(w,s,e,n) {dmaxloc_(w,*(s),*(e),n)}

/* procedure parameter types for -A and -C++ */

#define F2C_proc_par_types 1
#ifdef __cplusplus
typedef logical (*L_fp)(...);
#else
typedef logical (*L_fp)();
#endif

static float spow_ui(float x, integer n) {
	float pow=1.0; unsigned long int u;
	if(n != 0) {
		if(n < 0) n = -n, x = 1/x;
		for(u = n; ; ) {
			if(u & 01) pow *= x;
			if(u >>= 1) x *= x;
			else break;
		}
	}
	return pow;
}
static double dpow_ui(double x, integer n) {
	double pow=1.0; unsigned long int u;
	if(n != 0) {
		if(n < 0) n = -n, x = 1/x;
		for(u = n; ; ) {
			if(u & 01) pow *= x;
			if(u >>= 1) x *= x;
			else break;
		}
	}
	return pow;
}
static _Complex float cpow_ui(_Complex float x, integer n) {
	_Complex float pow=1.0; unsigned long int u;
	if(n != 0) {
		if(n < 0) n = -n, x = 1/x;
		for(u = n; ; ) {
			if(u & 01) pow *= x;
			if(u >>= 1) x *= x;
			else break;
		}
	}
	return pow;
}
static _Complex double zpow_ui(_Complex double x, integer n) {
	_Complex double pow=1.0; unsigned long int u;
	if(n != 0) {
		if(n < 0) n = -n, x = 1/x;
		for(u = n; ; ) {
			if(u & 01) pow *= x;
			if(u >>= 1) x *= x;
			else break;
		}
	}
	return pow;
}
static integer pow_ii(integer x, integer n) {
	integer pow; unsigned long int u;
	if (n <= 0) {
		if (n == 0 || x == 1) pow = 1;
		else if (x != -1) pow = x == 0 ? 1/x : 0;
		else n = -n;
	}
	if ((n > 0) || !(n == 0 || x == 1 || x != -1)) {
		u = n;
		for(pow = 1; ; ) {
			if(u & 01) pow *= x;
			if(u >>= 1) x *= x;
			else break;
		}
	}
	return pow;
}
static integer dmaxloc_(double *w, integer s, integer e, integer *n)
{
	double m; integer i, mi;
	for(m=w[s-1], mi=s, i=s+1; i<=e; i++)
		if (w[i-1]>m) mi=i ,m=w[i-1];
	return mi-s+1;
}
static integer smaxloc_(float *w, integer s, integer e, integer *n)
{
	float m; integer i, mi;
	for(m=w[s-1], mi=s, i=s+1; i<=e; i++)
		if (w[i-1]>m) mi=i ,m=w[i-1];
	return mi-s+1;
}
static inline void cdotc_(complex *z, integer *n_, complex *x, integer *incx_, complex *y, integer *incy_) {
	integer n = *n_, incx = *incx_, incy = *incy_, i;
	_Complex float zdotc = 0.0;
	if (incx == 1 && incy == 1) {
		for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
			zdotc += conjf(Cf(&x[i])) * Cf(&y[i]);
		}
	} else {
		for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
			zdotc += conjf(Cf(&x[i*incx])) * Cf(&y[i*incy]);
		}
	}
	pCf(z) = zdotc;
}
static inline void zdotc_(doublecomplex *z, integer *n_, doublecomplex *x, integer *incx_, doublecomplex *y, integer *incy_) {
	integer n = *n_, incx = *incx_, incy = *incy_, i;
	_Complex double zdotc = 0.0;
	if (incx == 1 && incy == 1) {
		for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
			zdotc += conj(Cd(&x[i])) * Cd(&y[i]);
		}
	} else {
		for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
			zdotc += conj(Cd(&x[i*incx])) * Cd(&y[i*incy]);
		}
	}
	pCd(z) = zdotc;
}	
static inline void cdotu_(complex *z, integer *n_, complex *x, integer *incx_, complex *y, integer *incy_) {
	integer n = *n_, incx = *incx_, incy = *incy_, i;
	_Complex float zdotc = 0.0;
	if (incx == 1 && incy == 1) {
		for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
			zdotc += Cf(&x[i]) * Cf(&y[i]);
		}
	} else {
		for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
			zdotc += Cf(&x[i*incx]) * Cf(&y[i*incy]);
		}
	}
	pCf(z) = zdotc;
}
static inline void zdotu_(doublecomplex *z, integer *n_, doublecomplex *x, integer *incx_, doublecomplex *y, integer *incy_) {
	integer n = *n_, incx = *incx_, incy = *incy_, i;
	_Complex double zdotc = 0.0;
	if (incx == 1 && incy == 1) {
		for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
			zdotc += Cd(&x[i]) * Cd(&y[i]);
		}
	} else {
		for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
			zdotc += Cd(&x[i*incx]) * Cd(&y[i*incy]);
		}
	}
	pCd(z) = zdotc;
}
#endif
/*  -- translated by f2c (version 20000121).
   You must link the resulting object file with the libraries:
	-lf2c -lm   (in that order)
*/



/* > \brief \b DSYCONVF */

/*  =========== DOCUMENTATION =========== */

/* Online html documentation available at */
/*            http://www.netlib.org/lapack/explore-html/ */

/* > \htmlonly */
/* > Download DSYCONVF + dependencies */
/* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dsyconv
f.f"> */
/* > [TGZ]</a> */
/* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dsyconv
f.f"> */
/* > [ZIP]</a> */
/* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dsyconv
f.f"> */
/* > [TXT]</a> */
/* > \endhtmlonly */

/*  Definition: */
/*  =========== */

/*       SUBROUTINE DSYCONVF( UPLO, WAY, N, A, LDA, E, IPIV, INFO ) */

/*       CHARACTER          UPLO, WAY */
/*       INTEGER            INFO, LDA, N */
/*       INTEGER            IPIV( * ) */
/*       DOUBLE PRECISION   A( LDA, * ), E( * ) */


/* > \par Purpose: */
/*  ============= */
/* > */
/* > \verbatim */
/* > If parameter WAY = 'C': */
/* > DSYCONVF converts the factorization output format used in */
/* > DSYTRF provided on entry in parameter A into the factorization */
/* > output format used in DSYTRF_RK (or DSYTRF_BK) that is stored */
/* > on exit in parameters A and E. It also coverts in place details of */
/* > the intechanges stored in IPIV from the format used in DSYTRF into */
/* > the format used in DSYTRF_RK (or DSYTRF_BK). */
/* > */
/* > If parameter WAY = 'R': */
/* > DSYCONVF performs the conversion in reverse direction, i.e. */
/* > converts the factorization output format used in DSYTRF_RK */
/* > (or DSYTRF_BK) provided on entry in parameters A and E into */
/* > the factorization output format used in DSYTRF that is stored */
/* > on exit in parameter A. It also coverts in place details of */
/* > the intechanges stored in IPIV from the format used in DSYTRF_RK */
/* > (or DSYTRF_BK) into the format used in DSYTRF. */
/* > \endverbatim */

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

/* > \param[in] UPLO */
/* > \verbatim */
/* >          UPLO is CHARACTER*1 */
/* >          Specifies whether the details of the factorization are */
/* >          stored as an upper or lower triangular matrix A. */
/* >          = 'U':  Upper triangular */
/* >          = 'L':  Lower triangular */
/* > \endverbatim */
/* > */
/* > \param[in] WAY */
/* > \verbatim */
/* >          WAY is CHARACTER*1 */
/* >          = 'C': Convert */
/* >          = 'R': Revert */
/* > \endverbatim */
/* > */
/* > \param[in] N */
/* > \verbatim */
/* >          N is INTEGER */
/* >          The order of the matrix A.  N >= 0. */
/* > \endverbatim */
/* > */
/* > \param[in,out] A */
/* > \verbatim */
/* >          A is DOUBLE PRECISION array, dimension (LDA,N) */
/* > */
/* >          1) If WAY ='C': */
/* > */
/* >          On entry, contains factorization details in format used in */
/* >          DSYTRF: */
/* >            a) all elements of the symmetric block diagonal */
/* >               matrix D on the diagonal of A and on superdiagonal */
/* >               (or subdiagonal) of A, and */
/* >            b) If UPLO = 'U': multipliers used to obtain factor U */
/* >               in the superdiagonal part of A. */
/* >               If UPLO = 'L': multipliers used to obtain factor L */
/* >               in the superdiagonal part of A. */
/* > */
/* >          On exit, contains factorization details in format used in */
/* >          DSYTRF_RK or DSYTRF_BK: */
/* >            a) ONLY diagonal elements of the symmetric block diagonal */
/* >               matrix D on the diagonal of A, i.e. D(k,k) = A(k,k); */
/* >               (superdiagonal (or subdiagonal) elements of D */
/* >                are stored on exit in array E), and */
/* >            b) If UPLO = 'U': factor U in the superdiagonal part of A. */
/* >               If UPLO = 'L': factor L in the subdiagonal part of A. */
/* > */
/* >          2) If WAY = 'R': */
/* > */
/* >          On entry, contains factorization details in format used in */
/* >          DSYTRF_RK or DSYTRF_BK: */
/* >            a) ONLY diagonal elements of the symmetric block diagonal */
/* >               matrix D on the diagonal of A, i.e. D(k,k) = A(k,k); */
/* >               (superdiagonal (or subdiagonal) elements of D */
/* >                are stored on exit in array E), and */
/* >            b) If UPLO = 'U': factor U in the superdiagonal part of A. */
/* >               If UPLO = 'L': factor L in the subdiagonal part of A. */
/* > */
/* >          On exit, contains factorization details in format used in */
/* >          DSYTRF: */
/* >            a) all elements of the symmetric block diagonal */
/* >               matrix D on the diagonal of A and on superdiagonal */
/* >               (or subdiagonal) of A, and */
/* >            b) If UPLO = 'U': multipliers used to obtain factor U */
/* >               in the superdiagonal part of A. */
/* >               If UPLO = 'L': multipliers used to obtain factor L */
/* >               in the superdiagonal part of A. */
/* > \endverbatim */
/* > */
/* > \param[in] LDA */
/* > \verbatim */
/* >          LDA is INTEGER */
/* >          The leading dimension of the array A.  LDA >= f2cmax(1,N). */
/* > \endverbatim */
/* > */
/* > \param[in,out] E */
/* > \verbatim */
/* >          E is DOUBLE PRECISION array, dimension (N) */
/* > */
/* >          1) If WAY ='C': */
/* > */
/* >          On entry, just a workspace. */
/* > */
/* >          On exit, contains the superdiagonal (or subdiagonal) */
/* >          elements of the symmetric block diagonal matrix D */
/* >          with 1-by-1 or 2-by-2 diagonal blocks, where */
/* >          If UPLO = 'U': E(i) = D(i-1,i), i=2:N, E(1) is set to 0; */
/* >          If UPLO = 'L': E(i) = D(i+1,i), i=1:N-1, E(N) is set to 0. */
/* > */
/* >          2) If WAY = 'R': */
/* > */
/* >          On entry, contains the superdiagonal (or subdiagonal) */
/* >          elements of the symmetric block diagonal matrix D */
/* >          with 1-by-1 or 2-by-2 diagonal blocks, where */
/* >          If UPLO = 'U': E(i) = D(i-1,i),i=2:N, E(1) not referenced; */
/* >          If UPLO = 'L': E(i) = D(i+1,i),i=1:N-1, E(N) not referenced. */
/* > */
/* >          On exit, is not changed */
/* > \endverbatim */
/* . */
/* > \param[in,out] IPIV */
/* > \verbatim */
/* >          IPIV is INTEGER array, dimension (N) */
/* > */
/* >          1) If WAY ='C': */
/* >          On entry, details of the interchanges and the block */
/* >          structure of D in the format used in DSYTRF. */
/* >          On exit, details of the interchanges and the block */
/* >          structure of D in the format used in DSYTRF_RK */
/* >          ( or DSYTRF_BK). */
/* > */
/* >          1) If WAY ='R': */
/* >          On entry, details of the interchanges and the block */
/* >          structure of D in the format used in DSYTRF_RK */
/* >          ( or DSYTRF_BK). */
/* >          On exit, details of the interchanges and the block */
/* >          structure of D in the format used in DSYTRF. */
/* > \endverbatim */
/* > */
/* > \param[out] INFO */
/* > \verbatim */
/* >          INFO is INTEGER */
/* >          = 0:  successful exit */
/* >          < 0:  if INFO = -i, the i-th argument had an illegal value */
/* > \endverbatim */

/*  Authors: */
/*  ======== */

/* > \author Univ. of Tennessee */
/* > \author Univ. of California Berkeley */
/* > \author Univ. of Colorado Denver */
/* > \author NAG Ltd. */

/* > \date November 2017 */

/* > \ingroup doubleSYcomputational */

/* > \par Contributors: */
/*  ================== */
/* > */
/* > \verbatim */
/* > */
/* >  November 2017,  Igor Kozachenko, */
/* >                  Computer Science Division, */
/* >                  University of California, Berkeley */
/* > */
/* > \endverbatim */
/*  ===================================================================== */
/* Subroutine */ int dsyconvf_(char *uplo, char *way, integer *n, doublereal *
	a, integer *lda, doublereal *e, integer *ipiv, integer *info)
{
    /* System generated locals */
    integer a_dim1, a_offset, i__1;

    /* Local variables */
    integer i__;
    extern logical lsame_(char *, char *);
    extern /* Subroutine */ int dswap_(integer *, doublereal *, integer *, 
	    doublereal *, integer *);
    logical upper;
    integer ip;
    extern /* Subroutine */ int xerbla_(char *, integer *, ftnlen);
    logical convert;


/*  -- LAPACK computational routine (version 3.8.0) -- */
/*  -- LAPACK is a software package provided by Univ. of Tennessee,    -- */
/*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- */
/*     November 2017 */


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



    /* Parameter adjustments */
    a_dim1 = *lda;
    a_offset = 1 + a_dim1 * 1;
    a -= a_offset;
    --e;
    --ipiv;

    /* Function Body */
    *info = 0;
    upper = lsame_(uplo, "U");
    convert = lsame_(way, "C");
    if (! upper && ! lsame_(uplo, "L")) {
	*info = -1;
    } else if (! convert && ! lsame_(way, "R")) {
	*info = -2;
    } else if (*n < 0) {
	*info = -3;
    } else if (*lda < f2cmax(1,*n)) {
	*info = -5;
    }
    if (*info != 0) {
	i__1 = -(*info);
	xerbla_("DSYCONVF", &i__1, (ftnlen)8);
	return 0;
    }

/*     Quick return if possible */

    if (*n == 0) {
	return 0;
    }

    if (upper) {

/*        Begin A is UPPER */

	if (convert) {

/*           Convert A (A is upper) */


/*           Convert VALUE */

/*           Assign superdiagonal entries of D to array E and zero out */
/*           corresponding entries in input storage A */

	    i__ = *n;
	    e[1] = 0.;
	    while(i__ > 1) {
		if (ipiv[i__] < 0) {
		    e[i__] = a[i__ - 1 + i__ * a_dim1];
		    e[i__ - 1] = 0.;
		    a[i__ - 1 + i__ * a_dim1] = 0.;
		    --i__;
		} else {
		    e[i__] = 0.;
		}
		--i__;
	    }

/*           Convert PERMUTATIONS and IPIV */

/*           Apply permutations to submatrices of upper part of A */
/*           in factorization order where i decreases from N to 1 */

	    i__ = *n;
	    while(i__ >= 1) {
		if (ipiv[i__] > 0) {

/*                 1-by-1 pivot interchange */

/*                 Swap rows i and IPIV(i) in A(1:i,N-i:N) */

		    ip = ipiv[i__];
		    if (i__ < *n) {
			if (ip != i__) {
			    i__1 = *n - i__;
			    dswap_(&i__1, &a[i__ + (i__ + 1) * a_dim1], lda, &
				    a[ip + (i__ + 1) * a_dim1], lda);
			}
		    }

		} else {

/*                 2-by-2 pivot interchange */

/*                 Swap rows i-1 and IPIV(i) in A(1:i,N-i:N) */

		    ip = -ipiv[i__];
		    if (i__ < *n) {
			if (ip != i__ - 1) {
			    i__1 = *n - i__;
			    dswap_(&i__1, &a[i__ - 1 + (i__ + 1) * a_dim1], 
				    lda, &a[ip + (i__ + 1) * a_dim1], lda);
			}
		    }

/*                 Convert IPIV */
/*                 There is no interchnge of rows i and and IPIV(i), */
/*                 so this should be reflected in IPIV format for */
/*                 *SYTRF_RK ( or *SYTRF_BK) */

		    ipiv[i__] = i__;

		    --i__;

		}
		--i__;
	    }

	} else {

/*           Revert A (A is upper) */


/*           Revert PERMUTATIONS and IPIV */

/*           Apply permutations to submatrices of upper part of A */
/*           in reverse factorization order where i increases from 1 to N */

	    i__ = 1;
	    while(i__ <= *n) {
		if (ipiv[i__] > 0) {

/*                 1-by-1 pivot interchange */

/*                 Swap rows i and IPIV(i) in A(1:i,N-i:N) */

		    ip = ipiv[i__];
		    if (i__ < *n) {
			if (ip != i__) {
			    i__1 = *n - i__;
			    dswap_(&i__1, &a[ip + (i__ + 1) * a_dim1], lda, &
				    a[i__ + (i__ + 1) * a_dim1], lda);
			}
		    }

		} else {

/*                 2-by-2 pivot interchange */

/*                 Swap rows i-1 and IPIV(i) in A(1:i,N-i:N) */

		    ++i__;
		    ip = -ipiv[i__];
		    if (i__ < *n) {
			if (ip != i__ - 1) {
			    i__1 = *n - i__;
			    dswap_(&i__1, &a[ip + (i__ + 1) * a_dim1], lda, &
				    a[i__ - 1 + (i__ + 1) * a_dim1], lda);
			}
		    }

/*                 Convert IPIV */
/*                 There is one interchange of rows i-1 and IPIV(i-1), */
/*                 so this should be recorded in two consecutive entries */
/*                 in IPIV format for *SYTRF */

		    ipiv[i__] = ipiv[i__ - 1];

		}
		++i__;
	    }

/*           Revert VALUE */
/*           Assign superdiagonal entries of D from array E to */
/*           superdiagonal entries of A. */

	    i__ = *n;
	    while(i__ > 1) {
		if (ipiv[i__] < 0) {
		    a[i__ - 1 + i__ * a_dim1] = e[i__];
		    --i__;
		}
		--i__;
	    }

/*        End A is UPPER */

	}

    } else {

/*        Begin A is LOWER */

	if (convert) {

/*           Convert A (A is lower) */


/*           Convert VALUE */
/*           Assign subdiagonal entries of D to array E and zero out */
/*           corresponding entries in input storage A */

	    i__ = 1;
	    e[*n] = 0.;
	    while(i__ <= *n) {
		if (i__ < *n && ipiv[i__] < 0) {
		    e[i__] = a[i__ + 1 + i__ * a_dim1];
		    e[i__ + 1] = 0.;
		    a[i__ + 1 + i__ * a_dim1] = 0.;
		    ++i__;
		} else {
		    e[i__] = 0.;
		}
		++i__;
	    }

/*           Convert PERMUTATIONS and IPIV */

/*           Apply permutations to submatrices of lower part of A */
/*           in factorization order where k increases from 1 to N */

	    i__ = 1;
	    while(i__ <= *n) {
		if (ipiv[i__] > 0) {

/*                 1-by-1 pivot interchange */

/*                 Swap rows i and IPIV(i) in A(i:N,1:i-1) */

		    ip = ipiv[i__];
		    if (i__ > 1) {
			if (ip != i__) {
			    i__1 = i__ - 1;
			    dswap_(&i__1, &a[i__ + a_dim1], lda, &a[ip + 
				    a_dim1], lda);
			}
		    }

		} else {

/*                 2-by-2 pivot interchange */

/*                 Swap rows i+1 and IPIV(i) in A(i:N,1:i-1) */

		    ip = -ipiv[i__];
		    if (i__ > 1) {
			if (ip != i__ + 1) {
			    i__1 = i__ - 1;
			    dswap_(&i__1, &a[i__ + 1 + a_dim1], lda, &a[ip + 
				    a_dim1], lda);
			}
		    }

/*                 Convert IPIV */
/*                 There is no interchnge of rows i and and IPIV(i), */
/*                 so this should be reflected in IPIV format for */
/*                 *SYTRF_RK ( or *SYTRF_BK) */

		    ipiv[i__] = i__;

		    ++i__;

		}
		++i__;
	    }

	} else {

/*           Revert A (A is lower) */


/*           Revert PERMUTATIONS and IPIV */

/*           Apply permutations to submatrices of lower part of A */
/*           in reverse factorization order where i decreases from N to 1 */

	    i__ = *n;
	    while(i__ >= 1) {
		if (ipiv[i__] > 0) {

/*                 1-by-1 pivot interchange */

/*                 Swap rows i and IPIV(i) in A(i:N,1:i-1) */

		    ip = ipiv[i__];
		    if (i__ > 1) {
			if (ip != i__) {
			    i__1 = i__ - 1;
			    dswap_(&i__1, &a[ip + a_dim1], lda, &a[i__ + 
				    a_dim1], lda);
			}
		    }

		} else {

/*                 2-by-2 pivot interchange */

/*                 Swap rows i+1 and IPIV(i) in A(i:N,1:i-1) */

		    --i__;
		    ip = -ipiv[i__];
		    if (i__ > 1) {
			if (ip != i__ + 1) {
			    i__1 = i__ - 1;
			    dswap_(&i__1, &a[ip + a_dim1], lda, &a[i__ + 1 + 
				    a_dim1], lda);
			}
		    }

/*                 Convert IPIV */
/*                 There is one interchange of rows i+1 and IPIV(i+1), */
/*                 so this should be recorded in consecutive entries */
/*                 in IPIV format for *SYTRF */

		    ipiv[i__] = ipiv[i__ + 1];

		}
		--i__;
	    }

/*           Revert VALUE */
/*           Assign subdiagonal entries of D from array E to */
/*           subgiagonal entries of A. */

	    i__ = 1;
	    while(i__ <= *n - 1) {
		if (ipiv[i__] < 0) {
		    a[i__ + 1 + i__ * a_dim1] = e[i__];
		    ++i__;
		}
		++i__;
	    }

	}

/*        End A is LOWER */

    }
    return 0;

/*     End of DSYCONVF */

} /* dsyconvf_ */