int
f2c_chpr2(char* uplo, integer* N,
complex* alpha,
complex* X, integer* incX,
complex* Y, integer* incY,
complex* Ap)
{
chpr2_(uplo, N, alpha,
X, incX, Y, incY, Ap);
return 0;
}
void
chpr2(char uplo, int n, complex *alpha, complex *x, int incx, complex *y, int incy, complex *a )
{
chpr2_( &uplo, &n, alpha, x, &incx, y, &incy, a );
}
/* Subroutine */ int chpgst_(integer *itype, char *uplo, integer *n, complex *
ap, complex *bp, integer *info, ftnlen uplo_len)
{
/* System generated locals */
integer i__1, i__2, i__3, i__4;
real r__1, r__2;
complex q__1, q__2, q__3;
/* Local variables */
static integer j, k, j1, k1, jj, kk;
static complex ct;
static real ajj;
static integer j1j1;
static real akk;
static integer k1k1;
static real bjj, bkk;
extern /* Subroutine */ int chpr2_(char *, integer *, complex *, complex *
, integer *, complex *, integer *, complex *, ftnlen);
extern /* Complex */ VOID cdotc_(complex *, integer *, complex *, integer
*, complex *, integer *);
extern logical lsame_(char *, char *, ftnlen, ftnlen);
extern /* Subroutine */ int chpmv_(char *, integer *, complex *, complex *
, complex *, integer *, complex *, complex *, integer *, ftnlen),
caxpy_(integer *, complex *, complex *, integer *, complex *,
integer *), ctpmv_(char *, char *, char *, integer *, complex *,
complex *, integer *, ftnlen, ftnlen, ftnlen);
static logical upper;
extern /* Subroutine */ int ctpsv_(char *, char *, char *, integer *,
complex *, complex *, integer *, ftnlen, ftnlen, ftnlen), csscal_(
integer *, real *, complex *, integer *), xerbla_(char *, integer
*, ftnlen);
/* -- LAPACK routine (version 3.0) -- */
/* Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd., */
/* Courant Institute, Argonne National Lab, and Rice University */
/* September 30, 1994 */
/* .. Scalar Arguments .. */
/* .. */
/* .. Array Arguments .. */
/* .. */
/* Purpose */
/* ======= */
/* CHPGST reduces a complex Hermitian-definite generalized */
/* eigenproblem to standard form, using packed storage. */
/* If ITYPE = 1, the problem is A*x = lambda*B*x, */
/* and A is overwritten by inv(U**H)*A*inv(U) or inv(L)*A*inv(L**H) */
/* If ITYPE = 2 or 3, the problem is A*B*x = lambda*x or */
/* B*A*x = lambda*x, and A is overwritten by U*A*U**H or L**H*A*L. */
/* B must have been previously factorized as U**H*U or L*L**H by CPPTRF. */
/* Arguments */
/* ========= */
/* ITYPE (input) INTEGER */
/* = 1: compute inv(U**H)*A*inv(U) or inv(L)*A*inv(L**H); */
/* = 2 or 3: compute U*A*U**H or L**H*A*L. */
/* UPLO (input) CHARACTER */
/* = 'U': Upper triangle of A is stored and B is factored as */
/* U**H*U; */
/* = 'L': Lower triangle of A is stored and B is factored as */
/* L*L**H. */
/* N (input) INTEGER */
/* The order of the matrices A and B. N >= 0. */
/* AP (input/output) COMPLEX array, dimension (N*(N+1)/2) */
/* On entry, the upper or lower triangle of the Hermitian matrix */
/* A, packed columnwise in a linear array. The j-th column of A */
/* is stored in the array AP as follows: */
/* if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j; */
/* if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n. */
/* On exit, if INFO = 0, the transformed matrix, stored in the */
/* same format as A. */
/* BP (input) COMPLEX array, dimension (N*(N+1)/2) */
/* The triangular factor from the Cholesky factorization of B, */
/* stored in the same format as A, as returned by CPPTRF. */
/* INFO (output) INTEGER */
/* = 0: successful exit */
/* < 0: if INFO = -i, the i-th argument had an illegal value */
/* ===================================================================== */
/* .. Parameters .. */
/* .. */
/* .. Local Scalars .. */
/* .. */
/* .. External Subroutines .. */
/* .. */
/* .. Intrinsic Functions .. */
/* .. */
/* .. External Functions .. */
/* .. */
/* .. Executable Statements .. */
/* Test the input parameters. */
/* Parameter adjustments */
--bp;
--ap;
/* Function Body */
*info = 0;
upper = lsame_(uplo, "U", (ftnlen)1, (ftnlen)1);
if (*itype < 1 || *itype > 3) {
*info = -1;
} else if (! upper && ! lsame_(uplo, "L", (ftnlen)1, (ftnlen)1)) {
*info = -2;
} else if (*n < 0) {
*info = -3;
}
if (*info != 0) {
i__1 = -(*info);
xerbla_("CHPGST", &i__1, (ftnlen)6);
return 0;
}
if (*itype == 1) {
if (upper) {
/* Compute inv(U')*A*inv(U) */
/* J1 and JJ are the indices of A(1,j) and A(j,j) */
jj = 0;
i__1 = *n;
for (j = 1; j <= i__1; ++j) {
j1 = jj + 1;
jj += j;
/* Compute the j-th column of the upper triangle of A */
i__2 = jj;
i__3 = jj;
r__1 = ap[i__3].r;
ap[i__2].r = r__1, ap[i__2].i = 0.f;
i__2 = jj;
bjj = bp[i__2].r;
ctpsv_(uplo, "Conjugate transpose", "Non-unit", &j, &bp[1], &
ap[j1], &c__1, (ftnlen)1, (ftnlen)19, (ftnlen)8);
i__2 = j - 1;
q__1.r = -1.f, q__1.i = -0.f;
chpmv_(uplo, &i__2, &q__1, &ap[1], &bp[j1], &c__1, &c_b1, &ap[
j1], &c__1, (ftnlen)1);
i__2 = j - 1;
r__1 = 1.f / bjj;
csscal_(&i__2, &r__1, &ap[j1], &c__1);
i__2 = jj;
i__3 = jj;
i__4 = j - 1;
cdotc_(&q__3, &i__4, &ap[j1], &c__1, &bp[j1], &c__1);
q__2.r = ap[i__3].r - q__3.r, q__2.i = ap[i__3].i - q__3.i;
q__1.r = q__2.r / bjj, q__1.i = q__2.i / bjj;
ap[i__2].r = q__1.r, ap[i__2].i = q__1.i;
/* L10: */
}
} else {
/* Compute inv(L)*A*inv(L') */
/* KK and K1K1 are the indices of A(k,k) and A(k+1,k+1) */
kk = 1;
i__1 = *n;
for (k = 1; k <= i__1; ++k) {
k1k1 = kk + *n - k + 1;
/* Update the lower triangle of A(k:n,k:n) */
i__2 = kk;
akk = ap[i__2].r;
i__2 = kk;
bkk = bp[i__2].r;
/* Computing 2nd power */
r__1 = bkk;
akk /= r__1 * r__1;
i__2 = kk;
ap[i__2].r = akk, ap[i__2].i = 0.f;
if (k < *n) {
i__2 = *n - k;
r__1 = 1.f / bkk;
csscal_(&i__2, &r__1, &ap[kk + 1], &c__1);
r__1 = akk * -.5f;
ct.r = r__1, ct.i = 0.f;
i__2 = *n - k;
caxpy_(&i__2, &ct, &bp[kk + 1], &c__1, &ap[kk + 1], &c__1)
;
i__2 = *n - k;
q__1.r = -1.f, q__1.i = -0.f;
chpr2_(uplo, &i__2, &q__1, &ap[kk + 1], &c__1, &bp[kk + 1]
, &c__1, &ap[k1k1], (ftnlen)1);
i__2 = *n - k;
caxpy_(&i__2, &ct, &bp[kk + 1], &c__1, &ap[kk + 1], &c__1)
;
i__2 = *n - k;
ctpsv_(uplo, "No transpose", "Non-unit", &i__2, &bp[k1k1],
&ap[kk + 1], &c__1, (ftnlen)1, (ftnlen)12, (
ftnlen)8);
}
kk = k1k1;
/* L20: */
}
}
} else {
if (upper) {
/* Compute U*A*U' */
/* K1 and KK are the indices of A(1,k) and A(k,k) */
kk = 0;
i__1 = *n;
for (k = 1; k <= i__1; ++k) {
k1 = kk + 1;
kk += k;
/* Update the upper triangle of A(1:k,1:k) */
i__2 = kk;
akk = ap[i__2].r;
i__2 = kk;
bkk = bp[i__2].r;
i__2 = k - 1;
ctpmv_(uplo, "No transpose", "Non-unit", &i__2, &bp[1], &ap[
k1], &c__1, (ftnlen)1, (ftnlen)12, (ftnlen)8);
r__1 = akk * .5f;
ct.r = r__1, ct.i = 0.f;
i__2 = k - 1;
caxpy_(&i__2, &ct, &bp[k1], &c__1, &ap[k1], &c__1);
i__2 = k - 1;
chpr2_(uplo, &i__2, &c_b1, &ap[k1], &c__1, &bp[k1], &c__1, &
ap[1], (ftnlen)1);
i__2 = k - 1;
caxpy_(&i__2, &ct, &bp[k1], &c__1, &ap[k1], &c__1);
i__2 = k - 1;
csscal_(&i__2, &bkk, &ap[k1], &c__1);
i__2 = kk;
/* Computing 2nd power */
r__2 = bkk;
r__1 = akk * (r__2 * r__2);
ap[i__2].r = r__1, ap[i__2].i = 0.f;
/* L30: */
}
} else {
/* Compute L'*A*L */
/* JJ and J1J1 are the indices of A(j,j) and A(j+1,j+1) */
jj = 1;
i__1 = *n;
for (j = 1; j <= i__1; ++j) {
j1j1 = jj + *n - j + 1;
/* Compute the j-th column of the lower triangle of A */
i__2 = jj;
ajj = ap[i__2].r;
i__2 = jj;
bjj = bp[i__2].r;
i__2 = jj;
r__1 = ajj * bjj;
i__3 = *n - j;
cdotc_(&q__2, &i__3, &ap[jj + 1], &c__1, &bp[jj + 1], &c__1);
q__1.r = r__1 + q__2.r, q__1.i = q__2.i;
ap[i__2].r = q__1.r, ap[i__2].i = q__1.i;
i__2 = *n - j;
csscal_(&i__2, &bjj, &ap[jj + 1], &c__1);
i__2 = *n - j;
chpmv_(uplo, &i__2, &c_b1, &ap[j1j1], &bp[jj + 1], &c__1, &
c_b1, &ap[jj + 1], &c__1, (ftnlen)1);
i__2 = *n - j + 1;
ctpmv_(uplo, "Conjugate transpose", "Non-unit", &i__2, &bp[jj]
, &ap[jj], &c__1, (ftnlen)1, (ftnlen)19, (ftnlen)8);
jj = j1j1;
/* L40: */
}
}
}
return 0;
/* End of CHPGST */
} /* chpgst_ */
/* Subroutine */ int chptrd_(char *uplo, integer *n, complex *ap, real *d__,
real *e, complex *tau, integer *info)
{
/* System generated locals */
integer i__1, i__2, i__3;
real r__1;
complex q__1, q__2, q__3, q__4;
/* Local variables */
integer i__, i1, ii, i1i1;
complex taui;
extern /* Subroutine */ int chpr2_(char *, integer *, complex *, complex *
, integer *, complex *, integer *, complex *);
complex alpha;
extern /* Complex */ VOID cdotc_(complex *, integer *, complex *, integer
*, complex *, integer *);
extern logical lsame_(char *, char *);
extern /* Subroutine */ int chpmv_(char *, integer *, complex *, complex *
, complex *, integer *, complex *, complex *, integer *),
caxpy_(integer *, complex *, complex *, integer *, complex *,
integer *);
logical upper;
extern /* Subroutine */ int clarfg_(integer *, complex *, complex *,
integer *, complex *), xerbla_(char *, integer *);
/* -- LAPACK routine (version 3.2) -- */
/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
/* November 2006 */
/* .. Scalar Arguments .. */
/* .. */
/* .. Array Arguments .. */
/* .. */
/* Purpose */
/* ======= */
/* CHPTRD reduces a complex Hermitian matrix A stored in packed form to */
/* real symmetric tridiagonal form T by a unitary similarity */
/* transformation: Q**H * A * Q = T. */
/* Arguments */
/* ========= */
/* UPLO (input) CHARACTER*1 */
/* = 'U': Upper triangle of A is stored; */
/* = 'L': Lower triangle of A is stored. */
/* N (input) INTEGER */
/* The order of the matrix A. N >= 0. */
/* AP (input/output) COMPLEX array, dimension (N*(N+1)/2) */
/* On entry, the upper or lower triangle of the Hermitian matrix */
/* A, packed columnwise in a linear array. The j-th column of A */
/* is stored in the array AP as follows: */
/* if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j; */
/* if UPLO = 'L', AP(i + (j-1)*(2*n-j)/2) = A(i,j) for j<=i<=n. */
/* On exit, if UPLO = 'U', the diagonal and first superdiagonal */
/* of A are overwritten by the corresponding elements of the */
/* tridiagonal matrix T, and the elements above the first */
/* superdiagonal, with the array TAU, represent the unitary */
/* matrix Q as a product of elementary reflectors; if UPLO */
/* = 'L', the diagonal and first subdiagonal of A are over- */
/* written by the corresponding elements of the tridiagonal */
/* matrix T, and the elements below the first subdiagonal, with */
/* the array TAU, represent the unitary matrix Q as a product */
/* of elementary reflectors. See Further Details. */
/* D (output) REAL array, dimension (N) */
/* The diagonal elements of the tridiagonal matrix T: */
/* D(i) = A(i,i). */
/* E (output) REAL array, dimension (N-1) */
/* The off-diagonal elements of the tridiagonal matrix T: */
/* E(i) = A(i,i+1) if UPLO = 'U', E(i) = A(i+1,i) if UPLO = 'L'. */
/* TAU (output) COMPLEX array, dimension (N-1) */
/* The scalar factors of the elementary reflectors (see Further */
/* Details). */
/* INFO (output) INTEGER */
/* = 0: successful exit */
/* < 0: if INFO = -i, the i-th argument had an illegal value */
/* Further Details */
/* =============== */
/* If UPLO = 'U', the matrix Q is represented as a product of elementary */
/* reflectors */
/* Q = H(n-1) . . . H(2) H(1). */
/* Each H(i) has the form */
/* H(i) = I - tau * v * v' */
/* where tau is a complex scalar, and v is a complex vector with */
/* v(i+1:n) = 0 and v(i) = 1; v(1:i-1) is stored on exit in AP, */
/* overwriting A(1:i-1,i+1), and tau is stored in TAU(i). */
/* If UPLO = 'L', the matrix Q is represented as a product of elementary */
/* reflectors */
/* Q = H(1) H(2) . . . H(n-1). */
/* Each H(i) has the form */
/* H(i) = I - tau * v * v' */
/* where tau is a complex scalar, and v is a complex vector with */
/* v(1:i) = 0 and v(i+1) = 1; v(i+2:n) is stored on exit in AP, */
/* overwriting A(i+2:n,i), and tau is stored in TAU(i). */
/* ===================================================================== */
/* .. Parameters .. */
/* .. */
/* .. Local Scalars .. */
/* .. */
/* .. External Subroutines .. */
/* .. */
/* .. External Functions .. */
/* .. */
/* .. Intrinsic Functions .. */
/* .. */
/* .. Executable Statements .. */
/* Test the input parameters */
/* Parameter adjustments */
--tau;
--e;
--d__;
--ap;
/* Function Body */
*info = 0;
upper = lsame_(uplo, "U");
if (! upper && ! lsame_(uplo, "L")) {
*info = -1;
} else if (*n < 0) {
*info = -2;
}
if (*info != 0) {
i__1 = -(*info);
xerbla_("CHPTRD", &i__1);
return 0;
}
/* Quick return if possible */
if (*n <= 0) {
return 0;
}
if (upper) {
/* Reduce the upper triangle of A. */
/* I1 is the index in AP of A(1,I+1). */
i1 = *n * (*n - 1) / 2 + 1;
i__1 = i1 + *n - 1;
i__2 = i1 + *n - 1;
r__1 = ap[i__2].r;
ap[i__1].r = r__1, ap[i__1].i = 0.f;
for (i__ = *n - 1; i__ >= 1; --i__) {
/* Generate elementary reflector H(i) = I - tau * v * v' */
/* to annihilate A(1:i-1,i+1) */
i__1 = i1 + i__ - 1;
alpha.r = ap[i__1].r, alpha.i = ap[i__1].i;
clarfg_(&i__, &alpha, &ap[i1], &c__1, &taui);
i__1 = i__;
e[i__1] = alpha.r;
if (taui.r != 0.f || taui.i != 0.f) {
/* Apply H(i) from both sides to A(1:i,1:i) */
i__1 = i1 + i__ - 1;
ap[i__1].r = 1.f, ap[i__1].i = 0.f;
/* Compute y := tau * A * v storing y in TAU(1:i) */
chpmv_(uplo, &i__, &taui, &ap[1], &ap[i1], &c__1, &c_b2, &tau[
1], &c__1);
/* Compute w := y - 1/2 * tau * (y'*v) * v */
q__3.r = -.5f, q__3.i = -0.f;
q__2.r = q__3.r * taui.r - q__3.i * taui.i, q__2.i = q__3.r *
taui.i + q__3.i * taui.r;
cdotc_(&q__4, &i__, &tau[1], &c__1, &ap[i1], &c__1);
q__1.r = q__2.r * q__4.r - q__2.i * q__4.i, q__1.i = q__2.r *
q__4.i + q__2.i * q__4.r;
alpha.r = q__1.r, alpha.i = q__1.i;
caxpy_(&i__, &alpha, &ap[i1], &c__1, &tau[1], &c__1);
/* Apply the transformation as a rank-2 update: */
/* A := A - v * w' - w * v' */
q__1.r = -1.f, q__1.i = -0.f;
chpr2_(uplo, &i__, &q__1, &ap[i1], &c__1, &tau[1], &c__1, &ap[
1]);
}
i__1 = i1 + i__ - 1;
i__2 = i__;
ap[i__1].r = e[i__2], ap[i__1].i = 0.f;
i__1 = i__ + 1;
i__2 = i1 + i__;
d__[i__1] = ap[i__2].r;
i__1 = i__;
tau[i__1].r = taui.r, tau[i__1].i = taui.i;
i1 -= i__;
/* L10: */
}
d__[1] = ap[1].r;
} else {
/* Reduce the lower triangle of A. II is the index in AP of */
/* A(i,i) and I1I1 is the index of A(i+1,i+1). */
ii = 1;
r__1 = ap[1].r;
ap[1].r = r__1, ap[1].i = 0.f;
i__1 = *n - 1;
for (i__ = 1; i__ <= i__1; ++i__) {
i1i1 = ii + *n - i__ + 1;
/* Generate elementary reflector H(i) = I - tau * v * v' */
/* to annihilate A(i+2:n,i) */
i__2 = ii + 1;
alpha.r = ap[i__2].r, alpha.i = ap[i__2].i;
i__2 = *n - i__;
clarfg_(&i__2, &alpha, &ap[ii + 2], &c__1, &taui);
i__2 = i__;
e[i__2] = alpha.r;
if (taui.r != 0.f || taui.i != 0.f) {
/* Apply H(i) from both sides to A(i+1:n,i+1:n) */
i__2 = ii + 1;
ap[i__2].r = 1.f, ap[i__2].i = 0.f;
/* Compute y := tau * A * v storing y in TAU(i:n-1) */
i__2 = *n - i__;
chpmv_(uplo, &i__2, &taui, &ap[i1i1], &ap[ii + 1], &c__1, &
c_b2, &tau[i__], &c__1);
/* Compute w := y - 1/2 * tau * (y'*v) * v */
q__3.r = -.5f, q__3.i = -0.f;
q__2.r = q__3.r * taui.r - q__3.i * taui.i, q__2.i = q__3.r *
taui.i + q__3.i * taui.r;
i__2 = *n - i__;
cdotc_(&q__4, &i__2, &tau[i__], &c__1, &ap[ii + 1], &c__1);
q__1.r = q__2.r * q__4.r - q__2.i * q__4.i, q__1.i = q__2.r *
q__4.i + q__2.i * q__4.r;
alpha.r = q__1.r, alpha.i = q__1.i;
i__2 = *n - i__;
caxpy_(&i__2, &alpha, &ap[ii + 1], &c__1, &tau[i__], &c__1);
/* Apply the transformation as a rank-2 update: */
/* A := A - v * w' - w * v' */
i__2 = *n - i__;
q__1.r = -1.f, q__1.i = -0.f;
chpr2_(uplo, &i__2, &q__1, &ap[ii + 1], &c__1, &tau[i__], &
c__1, &ap[i1i1]);
}
i__2 = ii + 1;
i__3 = i__;
ap[i__2].r = e[i__3], ap[i__2].i = 0.f;
i__2 = i__;
i__3 = ii;
d__[i__2] = ap[i__3].r;
i__2 = i__;
tau[i__2].r = taui.r, tau[i__2].i = taui.i;
ii = i1i1;
/* L20: */
}
i__1 = *n;
i__2 = ii;
d__[i__1] = ap[i__2].r;
}
return 0;
/* End of CHPTRD */
} /* chptrd_ */
/* Subroutine */
int chpgst_(integer *itype, char *uplo, integer *n, complex * ap, complex *bp, integer *info)
{
/* System generated locals */
integer i__1, i__2, i__3, i__4;
real r__1, r__2;
complex q__1, q__2, q__3;
/* Local variables */
integer j, k, j1, k1, jj, kk;
complex ct;
real ajj;
integer j1j1;
real akk;
integer k1k1;
real bjj, bkk;
extern /* Subroutine */
int chpr2_(char *, integer *, complex *, complex * , integer *, complex *, integer *, complex *);
extern /* Complex */
VOID cdotc_f2c_(complex *, integer *, complex *, integer *, complex *, integer *);
extern logical lsame_(char *, char *);
extern /* Subroutine */
int chpmv_(char *, integer *, complex *, complex * , complex *, integer *, complex *, complex *, integer *), caxpy_(integer *, complex *, complex *, integer *, complex *, integer *), ctpmv_(char *, char *, char *, integer *, complex *, complex *, integer *);
logical upper;
extern /* Subroutine */
int ctpsv_(char *, char *, char *, integer *, complex *, complex *, integer *), csscal_( integer *, real *, complex *, integer *), xerbla_(char *, integer *);
/* -- LAPACK computational routine (version 3.4.0) -- */
/* -- LAPACK is a software package provided by Univ. of Tennessee, -- */
/* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- */
/* November 2011 */
/* .. Scalar Arguments .. */
/* .. */
/* .. Array Arguments .. */
/* .. */
/* ===================================================================== */
/* .. Parameters .. */
/* .. */
/* .. Local Scalars .. */
/* .. */
/* .. External Subroutines .. */
/* .. */
/* .. Intrinsic Functions .. */
/* .. */
/* .. External Functions .. */
/* .. */
/* .. Executable Statements .. */
/* Test the input parameters. */
/* Parameter adjustments */
--bp;
--ap;
/* Function Body */
*info = 0;
upper = lsame_(uplo, "U");
if (*itype < 1 || *itype > 3)
{
*info = -1;
}
else if (! upper && ! lsame_(uplo, "L"))
{
*info = -2;
}
else if (*n < 0)
{
*info = -3;
}
if (*info != 0)
{
i__1 = -(*info);
xerbla_("CHPGST", &i__1);
return 0;
}
if (*itype == 1)
{
if (upper)
{
/* Compute inv(U**H)*A*inv(U) */
/* J1 and JJ are the indices of A(1,j) and A(j,j) */
jj = 0;
i__1 = *n;
for (j = 1;
j <= i__1;
++j)
{
j1 = jj + 1;
jj += j;
/* Compute the j-th column of the upper triangle of A */
i__2 = jj;
i__3 = jj;
r__1 = ap[i__3].r;
ap[i__2].r = r__1;
ap[i__2].i = 0.f; // , expr subst
i__2 = jj;
bjj = bp[i__2].r;
ctpsv_(uplo, "Conjugate transpose", "Non-unit", &j, &bp[1], & ap[j1], &c__1);
i__2 = j - 1;
q__1.r = -1.f;
q__1.i = -0.f; // , expr subst
chpmv_(uplo, &i__2, &q__1, &ap[1], &bp[j1], &c__1, &c_b1, &ap[ j1], &c__1);
i__2 = j - 1;
r__1 = 1.f / bjj;
csscal_(&i__2, &r__1, &ap[j1], &c__1);
i__2 = jj;
i__3 = jj;
i__4 = j - 1;
cdotc_f2c_(&q__3, &i__4, &ap[j1], &c__1, &bp[j1], &c__1);
q__2.r = ap[i__3].r - q__3.r;
q__2.i = ap[i__3].i - q__3.i; // , expr subst
q__1.r = q__2.r / bjj;
q__1.i = q__2.i / bjj; // , expr subst
ap[i__2].r = q__1.r;
ap[i__2].i = q__1.i; // , expr subst
/* L10: */
}
}
else
{
/* Compute inv(L)*A*inv(L**H) */
/* KK and K1K1 are the indices of A(k,k) and A(k+1,k+1) */
kk = 1;
i__1 = *n;
for (k = 1;
k <= i__1;
++k)
{
k1k1 = kk + *n - k + 1;
/* Update the lower triangle of A(k:n,k:n) */
i__2 = kk;
akk = ap[i__2].r;
i__2 = kk;
bkk = bp[i__2].r;
/* Computing 2nd power */
r__1 = bkk;
akk /= r__1 * r__1;
i__2 = kk;
ap[i__2].r = akk;
ap[i__2].i = 0.f; // , expr subst
if (k < *n)
{
i__2 = *n - k;
r__1 = 1.f / bkk;
csscal_(&i__2, &r__1, &ap[kk + 1], &c__1);
r__1 = akk * -.5f;
ct.r = r__1;
ct.i = 0.f; // , expr subst
i__2 = *n - k;
caxpy_(&i__2, &ct, &bp[kk + 1], &c__1, &ap[kk + 1], &c__1) ;
i__2 = *n - k;
q__1.r = -1.f;
q__1.i = -0.f; // , expr subst
chpr2_(uplo, &i__2, &q__1, &ap[kk + 1], &c__1, &bp[kk + 1] , &c__1, &ap[k1k1]);
i__2 = *n - k;
caxpy_(&i__2, &ct, &bp[kk + 1], &c__1, &ap[kk + 1], &c__1) ;
i__2 = *n - k;
ctpsv_(uplo, "No transpose", "Non-unit", &i__2, &bp[k1k1], &ap[kk + 1], &c__1);
}
kk = k1k1;
/* L20: */
}
}
}
else
{
if (upper)
{
/* Compute U*A*U**H */
/* K1 and KK are the indices of A(1,k) and A(k,k) */
kk = 0;
i__1 = *n;
for (k = 1;
k <= i__1;
++k)
{
k1 = kk + 1;
kk += k;
/* Update the upper triangle of A(1:k,1:k) */
i__2 = kk;
akk = ap[i__2].r;
i__2 = kk;
bkk = bp[i__2].r;
i__2 = k - 1;
ctpmv_(uplo, "No transpose", "Non-unit", &i__2, &bp[1], &ap[ k1], &c__1);
r__1 = akk * .5f;
ct.r = r__1;
ct.i = 0.f; // , expr subst
i__2 = k - 1;
caxpy_(&i__2, &ct, &bp[k1], &c__1, &ap[k1], &c__1);
i__2 = k - 1;
chpr2_(uplo, &i__2, &c_b1, &ap[k1], &c__1, &bp[k1], &c__1, & ap[1]);
i__2 = k - 1;
caxpy_(&i__2, &ct, &bp[k1], &c__1, &ap[k1], &c__1);
i__2 = k - 1;
csscal_(&i__2, &bkk, &ap[k1], &c__1);
i__2 = kk;
/* Computing 2nd power */
r__2 = bkk;
r__1 = akk * (r__2 * r__2);
ap[i__2].r = r__1;
ap[i__2].i = 0.f; // , expr subst
/* L30: */
}
}
else
{
/* Compute L**H *A*L */
/* JJ and J1J1 are the indices of A(j,j) and A(j+1,j+1) */
jj = 1;
i__1 = *n;
for (j = 1;
j <= i__1;
++j)
{
j1j1 = jj + *n - j + 1;
/* Compute the j-th column of the lower triangle of A */
i__2 = jj;
ajj = ap[i__2].r;
i__2 = jj;
bjj = bp[i__2].r;
i__2 = jj;
r__1 = ajj * bjj;
i__3 = *n - j;
cdotc_f2c_(&q__2, &i__3, &ap[jj + 1], &c__1, &bp[jj + 1], &c__1);
q__1.r = r__1 + q__2.r;
q__1.i = q__2.i; // , expr subst
ap[i__2].r = q__1.r;
ap[i__2].i = q__1.i; // , expr subst
i__2 = *n - j;
csscal_(&i__2, &bjj, &ap[jj + 1], &c__1);
i__2 = *n - j;
chpmv_(uplo, &i__2, &c_b1, &ap[j1j1], &bp[jj + 1], &c__1, & c_b1, &ap[jj + 1], &c__1);
i__2 = *n - j + 1;
ctpmv_(uplo, "Conjugate transpose", "Non-unit", &i__2, &bp[jj] , &ap[jj], &c__1);
jj = j1j1;
/* L40: */
}
}
}
return 0;
/* End of CHPGST */
}
