int
clacon_(int *n, complex *v, complex *x, float *est, int *kase)
{
/* Table of constant values */
int c__1 = 1;
complex zero = {0.0, 0.0};
complex one = {1.0, 0.0};
/* System generated locals */
float d__1;
/* Local variables */
static int iter;
static int jump, jlast;
static float altsgn, estold;
static int i, j;
float temp;
float safmin;
extern double slamch_(char *);
extern int icmax1_(int *, complex *, int *);
extern double scsum1_(int *, complex *, int *);
safmin = slamch_("Safe minimum");
if ( *kase == 0 ) {
for (i = 0; i < *n; ++i) {
x[i].r = 1. / (float) (*n);
x[i].i = 0.;
}
*kase = 1;
jump = 1;
return 0;
}
switch (jump) {
case 1: goto L20;
case 2: goto L40;
case 3: goto L70;
case 4: goto L110;
case 5: goto L140;
}
/* ................ ENTRY (JUMP = 1)
FIRST ITERATION. X HAS BEEN OVERWRITTEN BY A*X. */
L20:
if (*n == 1) {
v[0] = x[0];
*est = c_abs(&v[0]);
/* ... QUIT */
goto L150;
}
*est = scsum1_(n, x, &c__1);
for (i = 0; i < *n; ++i) {
d__1 = c_abs(&x[i]);
if (d__1 > safmin) {
d__1 = 1 / d__1;
x[i].r *= d__1;
x[i].i *= d__1;
} else {
x[i] = one;
}
}
*kase = 2;
jump = 2;
return 0;
/* ................ ENTRY (JUMP = 2)
FIRST ITERATION. X HAS BEEN OVERWRITTEN BY TRANSPOSE(A)*X. */
L40:
j = icmax1_(n, &x[0], &c__1);
--j;
iter = 2;
/* MAIN LOOP - ITERATIONS 2,3,...,ITMAX. */
L50:
for (i = 0; i < *n; ++i) x[i] = zero;
x[j] = one;
*kase = 1;
jump = 3;
return 0;
/* ................ ENTRY (JUMP = 3)
X HAS BEEN OVERWRITTEN BY A*X. */
L70:
#ifdef _CRAY
CCOPY(n, x, &c__1, v, &c__1);
#else
ccopy_(n, x, &c__1, v, &c__1);
#endif
estold = *est;
*est = scsum1_(n, v, &c__1);
L90:
/* TEST FOR CYCLING. */
if (*est <= estold) goto L120;
for (i = 0; i < *n; ++i) {
d__1 = c_abs(&x[i]);
if (d__1 > safmin) {
d__1 = 1 / d__1;
x[i].r *= d__1;
x[i].i *= d__1;
} else {
x[i] = one;
}
}
*kase = 2;
jump = 4;
return 0;
/* ................ ENTRY (JUMP = 4)
X HAS BEEN OVERWRITTEN BY TRANDPOSE(A)*X. */
L110:
jlast = j;
j = icmax1_(n, &x[0], &c__1);
--j;
if (x[jlast].r != (d__1 = x[j].r, fabs(d__1)) && iter < 5) {
++iter;
goto L50;
}
/* ITERATION COMPLETE. FINAL STAGE. */
L120:
altsgn = 1.;
for (i = 1; i <= *n; ++i) {
x[i-1].r = altsgn * ((float)(i - 1) / (float)(*n - 1) + 1.);
x[i-1].i = 0.;
altsgn = -altsgn;
}
*kase = 1;
jump = 5;
return 0;
/* ................ ENTRY (JUMP = 5)
X HAS BEEN OVERWRITTEN BY A*X. */
L140:
temp = scsum1_(n, x, &c__1) / (float)(*n * 3) * 2.;
if (temp > *est) {
#ifdef _CRAY
CCOPY(n, &x[0], &c__1, &v[0], &c__1);
#else
ccopy_(n, &x[0], &c__1, &v[0], &c__1);
#endif
*est = temp;
}
L150:
*kase = 0;
return 0;
} /* clacon_ */
/* Subroutine */ int clacn2_(integer *n, complex *v, complex *x, real *est,
integer *kase, integer *isave)
{
/* System generated locals */
integer i__1, i__2, i__3;
real r__1, r__2;
complex q__1;
/* Local variables */
integer i__;
real temp, absxi;
integer jlast;
real safmin, altsgn, estold;
/* -- LAPACK auxiliary routine (version 3.2) -- */
/* November 2006 */
/* Purpose */
/* ======= */
/* CLACN2 estimates the 1-norm of a square, complex matrix A. */
/* Reverse communication is used for evaluating matrix-vector products. */
/* Arguments */
/* ========= */
/* N (input) INTEGER */
/* The order of the matrix. N >= 1. */
/* V (workspace) COMPLEX array, dimension (N) */
/* On the final return, V = A*W, where EST = norm(V)/norm(W) */
/* (W is not returned). */
/* X (input/output) COMPLEX array, dimension (N) */
/* On an intermediate return, X should be overwritten by */
/* A * X, if KASE=1, */
/* A' * X, if KASE=2, */
/* where A' is the conjugate transpose of A, and CLACN2 must be */
/* re-called with all the other parameters unchanged. */
/* EST (input/output) REAL */
/* On entry with KASE = 1 or 2 and ISAVE(1) = 3, EST should be */
/* unchanged from the previous call to CLACN2. */
/* On exit, EST is an estimate (a lower bound) for norm(A). */
/* KASE (input/output) INTEGER */
/* On the initial call to CLACN2, KASE should be 0. */
/* On an intermediate return, KASE will be 1 or 2, indicating */
/* whether X should be overwritten by A * X or A' * X. */
/* On the final return from CLACN2, KASE will again be 0. */
/* ISAVE (input/output) INTEGER array, dimension (3) */
/* ISAVE is used to save variables between calls to SLACN2 */
/* Further Details */
/* ======= ======= */
/* Contributed by Nick Higham, University of Manchester. */
/* Originally named CONEST, dated March 16, 1988. */
/* Reference: N.J. Higham, "FORTRAN codes for estimating the one-norm of */
/* a real or complex matrix, with applications to condition estimation", */
/* ACM Trans. Math. Soft., vol. 14, no. 4, pp. 381-396, December 1988. */
/* Last modified: April, 1999 */
/* This is a thread safe version of CLACON, which uses the array ISAVE */
/* in place of a SAVE statement, as follows: */
/* CLACON CLACN2 */
/* JUMP ISAVE(1) */
/* J ISAVE(2) */
/* ITER ISAVE(3) */
/* ===================================================================== */
/* Parameter adjustments */
--isave;
--x;
--v;
/* Function Body */
safmin = slamch_("Safe minimum");
if (*kase == 0) {
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
i__2 = i__;
r__1 = 1.f / (real) (*n);
q__1.r = r__1, q__1.i = 0.f;
x[i__2].r = q__1.r, x[i__2].i = q__1.i;
}
*kase = 1;
isave[1] = 1;
return 0;
}
switch (isave[1]) {
case 1: goto L20;
case 2: goto L40;
case 3: goto L70;
case 4: goto L90;
case 5: goto L120;
}
/* FIRST ITERATION. X HAS BEEN OVERWRITTEN BY A*X. */
L20:
if (*n == 1) {
v[1].r = x[1].r, v[1].i = x[1].i;
*est = c_abs(&v[1]);
goto L130;
}
*est = scsum1_(n, &x[1], &c__1);
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
absxi = c_abs(&x[i__]);
if (absxi > safmin) {
i__2 = i__;
i__3 = i__;
r__1 = x[i__3].r / absxi;
r__2 = r_imag(&x[i__]) / absxi;
q__1.r = r__1, q__1.i = r__2;
x[i__2].r = q__1.r, x[i__2].i = q__1.i;
} else {
i__2 = i__;
x[i__2].r = 1.f, x[i__2].i = 0.f;
}
}
*kase = 2;
isave[1] = 2;
return 0;
/* FIRST ITERATION. X HAS BEEN OVERWRITTEN BY CTRANS(A)*X. */
L40:
isave[2] = icmax1_(n, &x[1], &c__1);
isave[3] = 2;
L50:
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
i__2 = i__;
x[i__2].r = 0.f, x[i__2].i = 0.f;
}
i__1 = isave[2];
x[i__1].r = 1.f, x[i__1].i = 0.f;
*kase = 1;
isave[1] = 3;
return 0;
/* X HAS BEEN OVERWRITTEN BY A*X. */
L70:
ccopy_(n, &x[1], &c__1, &v[1], &c__1);
estold = *est;
*est = scsum1_(n, &v[1], &c__1);
/* TEST FOR CYCLING. */
if (*est <= estold) {
goto L100;
}
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
absxi = c_abs(&x[i__]);
if (absxi > safmin) {
i__2 = i__;
i__3 = i__;
r__1 = x[i__3].r / absxi;
r__2 = r_imag(&x[i__]) / absxi;
q__1.r = r__1, q__1.i = r__2;
x[i__2].r = q__1.r, x[i__2].i = q__1.i;
} else {
i__2 = i__;
x[i__2].r = 1.f, x[i__2].i = 0.f;
}
}
*kase = 2;
isave[1] = 4;
return 0;
/* X HAS BEEN OVERWRITTEN BY CTRANS(A)*X. */
L90:
jlast = isave[2];
isave[2] = icmax1_(n, &x[1], &c__1);
if (c_abs(&x[jlast]) != c_abs(&x[isave[2]]) && isave[3] < 5) {
++isave[3];
goto L50;
}
/* ITERATION COMPLETE. FINAL STAGE. */
L100:
altsgn = 1.f;
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
i__2 = i__;
r__1 = altsgn * ((real) (i__ - 1) / (real) (*n - 1) + 1.f);
q__1.r = r__1, q__1.i = 0.f;
x[i__2].r = q__1.r, x[i__2].i = q__1.i;
altsgn = -altsgn;
}
*kase = 1;
isave[1] = 5;
return 0;
/* X HAS BEEN OVERWRITTEN BY A*X. */
L120:
temp = scsum1_(n, &x[1], &c__1) / (real) (*n * 3) * 2.f;
if (temp > *est) {
ccopy_(n, &x[1], &c__1, &v[1], &c__1);
*est = temp;
}
L130:
*kase = 0;
return 0;
/* End of CLACN2 */
} /* clacn2_ */
int clacon_(int *n, complex *v, complex *x, float *est,
int *kase)
{
/* System generated locals */
int i__1, i__2, i__3;
float r__1, r__2;
complex q__1;
/* Builtin functions */
double c_abs(complex *), r_imag(complex *);
/* Local variables */
static int i__, j, iter;
static float temp;
static int jump;
static float absxi;
static int jlast;
extern int ccopy_(int *, complex *, int *,
complex *, int *);
extern int icmax1_(int *, complex *, int *);
extern double scsum1_(int *, complex *, int *), slamch_(char *
);
static float safmin, altsgn, estold;
/* -- LAPACK auxiliary routine (version 3.2) -- */
/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
/* November 2006 */
/* .. Scalar Arguments .. */
/* .. */
/* .. Array Arguments .. */
/* .. */
/* Purpose */
/* ======= */
/* CLACON estimates the 1-norm of a square, complex matrix A. */
/* Reverse communication is used for evaluating matrix-vector products. */
/* Arguments */
/* ========= */
/* N (input) INTEGER */
/* The order of the matrix. N >= 1. */
/* V (workspace) COMPLEX array, dimension (N) */
/* On the final return, V = A*W, where EST = norm(V)/norm(W) */
/* (W is not returned). */
/* X (input/output) COMPLEX array, dimension (N) */
/* On an intermediate return, X should be overwritten by */
/* A * X, if KASE=1, */
/* A' * X, if KASE=2, */
/* where A' is the conjugate transpose of A, and CLACON must be */
/* re-called with all the other parameters unchanged. */
/* EST (input/output) REAL */
/* On entry with KASE = 1 or 2 and JUMP = 3, EST should be */
/* unchanged from the previous call to CLACON. */
/* On exit, EST is an estimate (a lower bound) for norm(A). */
/* KASE (input/output) INTEGER */
/* On the initial call to CLACON, KASE should be 0. */
/* On an intermediate return, KASE will be 1 or 2, indicating */
/* whether X should be overwritten by A * X or A' * X. */
/* On the final return from CLACON, KASE will again be 0. */
/* Further Details */
/* ======= ======= */
/* Contributed by Nick Higham, University of Manchester. */
/* Originally named CONEST, dated March 16, 1988. */
/* Reference: N.J. Higham, "FORTRAN codes for estimating the one-norm of */
/* a float or complex matrix, with applications to condition estimation", */
/* ACM Trans. Math. Soft., vol. 14, no. 4, pp. 381-396, December 1988. */
/* Last modified: April, 1999 */
/* ===================================================================== */
/* .. Parameters .. */
/* .. */
/* .. Local Scalars .. */
/* .. */
/* .. External Functions .. */
/* .. */
/* .. External Subroutines .. */
/* .. */
/* .. Intrinsic Functions .. */
/* .. */
/* .. Save statement .. */
/* .. */
/* .. Executable Statements .. */
/* Parameter adjustments */
--x;
--v;
/* Function Body */
safmin = slamch_("Safe minimum");
if (*kase == 0) {
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
i__2 = i__;
r__1 = 1.f / (float) (*n);
q__1.r = r__1, q__1.i = 0.f;
x[i__2].r = q__1.r, x[i__2].i = q__1.i;
/* L10: */
}
*kase = 1;
jump = 1;
return 0;
}
switch (jump) {
case 1: goto L20;
case 2: goto L40;
case 3: goto L70;
case 4: goto L90;
case 5: goto L120;
}
/* ................ ENTRY (JUMP = 1) */
/* FIRST ITERATION. X HAS BEEN OVERWRITTEN BY A*X. */
L20:
if (*n == 1) {
v[1].r = x[1].r, v[1].i = x[1].i;
*est = c_abs(&v[1]);
/* ... QUIT */
goto L130;
}
*est = scsum1_(n, &x[1], &c__1);
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
absxi = c_abs(&x[i__]);
if (absxi > safmin) {
i__2 = i__;
i__3 = i__;
r__1 = x[i__3].r / absxi;
r__2 = r_imag(&x[i__]) / absxi;
q__1.r = r__1, q__1.i = r__2;
x[i__2].r = q__1.r, x[i__2].i = q__1.i;
} else {
i__2 = i__;
x[i__2].r = 1.f, x[i__2].i = 0.f;
}
/* L30: */
}
*kase = 2;
jump = 2;
return 0;
/* ................ ENTRY (JUMP = 2) */
/* FIRST ITERATION. X HAS BEEN OVERWRITTEN BY CTRANS(A)*X. */
L40:
j = icmax1_(n, &x[1], &c__1);
iter = 2;
/* MAIN LOOP - ITERATIONS 2,3,...,ITMAX. */
L50:
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
i__2 = i__;
x[i__2].r = 0.f, x[i__2].i = 0.f;
/* L60: */
}
i__1 = j;
x[i__1].r = 1.f, x[i__1].i = 0.f;
*kase = 1;
jump = 3;
return 0;
/* ................ ENTRY (JUMP = 3) */
/* X HAS BEEN OVERWRITTEN BY A*X. */
L70:
ccopy_(n, &x[1], &c__1, &v[1], &c__1);
estold = *est;
*est = scsum1_(n, &v[1], &c__1);
/* TEST FOR CYCLING. */
if (*est <= estold) {
goto L100;
}
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
absxi = c_abs(&x[i__]);
if (absxi > safmin) {
i__2 = i__;
i__3 = i__;
r__1 = x[i__3].r / absxi;
r__2 = r_imag(&x[i__]) / absxi;
q__1.r = r__1, q__1.i = r__2;
x[i__2].r = q__1.r, x[i__2].i = q__1.i;
} else {
i__2 = i__;
x[i__2].r = 1.f, x[i__2].i = 0.f;
}
/* L80: */
}
*kase = 2;
jump = 4;
return 0;
/* ................ ENTRY (JUMP = 4) */
/* X HAS BEEN OVERWRITTEN BY CTRANS(A)*X. */
L90:
jlast = j;
j = icmax1_(n, &x[1], &c__1);
if (c_abs(&x[jlast]) != c_abs(&x[j]) && iter < 5) {
++iter;
goto L50;
}
/* ITERATION COMPLETE. FINAL STAGE. */
L100:
altsgn = 1.f;
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
i__2 = i__;
r__1 = altsgn * ((float) (i__ - 1) / (float) (*n - 1) + 1.f);
q__1.r = r__1, q__1.i = 0.f;
x[i__2].r = q__1.r, x[i__2].i = q__1.i;
altsgn = -altsgn;
/* L110: */
}
*kase = 1;
jump = 5;
return 0;
/* ................ ENTRY (JUMP = 5) */
/* X HAS BEEN OVERWRITTEN BY A*X. */
L120:
temp = scsum1_(n, &x[1], &c__1) / (float) (*n * 3) * 2.f;
if (temp > *est) {
ccopy_(n, &x[1], &c__1, &v[1], &c__1);
*est = temp;
}
L130:
*kase = 0;
return 0;
/* End of CLACON */
} /* clacon_ */
int
clacon_(int *n, complex *v, complex *x, float *est, int *kase)
{
/*
Purpose
=======
CLACON estimates the 1-norm of a square matrix A.
Reverse communication is used for evaluating matrix-vector products.
Arguments
=========
N (input) INT
The order of the matrix. N >= 1.
V (workspace) COMPLEX PRECISION array, dimension (N)
On the final return, V = A*W, where EST = norm(V)/norm(W)
(W is not returned).
X (input/output) COMPLEX PRECISION array, dimension (N)
On an intermediate return, X should be overwritten by
A * X, if KASE=1,
A' * X, if KASE=2,
where A' is the conjugate transpose of A,
and CLACON must be re-called with all the other parameters
unchanged.
EST (output) FLOAT PRECISION
An estimate (a lower bound) for norm(A).
KASE (input/output) INT
On the initial call to CLACON, KASE should be 0.
On an intermediate return, KASE will be 1 or 2, indicating
whether X should be overwritten by A * X or A' * X.
On the final return from CLACON, KASE will again be 0.
Further Details
======= =======
Contributed by Nick Higham, University of Manchester.
Originally named CONEST, dated March 16, 1988.
Reference: N.J. Higham, "FORTRAN codes for estimating the one-norm of
a real or complex matrix, with applications to condition estimation",
ACM Trans. Math. Soft., vol. 14, no. 4, pp. 381-396, December 1988.
=====================================================================
*/
/* Table of constant values */
int c__1 = 1;
complex zero = {0.0, 0.0};
complex one = {1.0, 0.0};
/* System generated locals */
float d__1;
/* Local variables */
static int iter;
static int jump, jlast;
static float altsgn, estold;
static int i, j;
float temp;
float safmin;
extern double slamch_(char *);
extern int icmax1_(int *, complex *, int *);
extern double scsum1_(int *, complex *, int *);
safmin = slamch_("Safe minimum");
if ( *kase == 0 ) {
for (i = 0; i < *n; ++i) {
x[i].r = 1. / (float) (*n);
x[i].i = 0.;
}
*kase = 1;
jump = 1;
return 0;
}
switch (jump) {
case 1: goto L20;
case 2: goto L40;
case 3: goto L70;
case 4: goto L110;
case 5: goto L140;
}
/* ................ ENTRY (JUMP = 1)
FIRST ITERATION. X HAS BEEN OVERWRITTEN BY A*X. */
L20:
if (*n == 1) {
v[0] = x[0];
*est = c_abs(&v[0]);
/* ... QUIT */
goto L150;
}
*est = scsum1_(n, x, &c__1);
for (i = 0; i < *n; ++i) {
d__1 = c_abs(&x[i]);
if (d__1 > safmin) {
d__1 = 1 / d__1;
x[i].r *= d__1;
x[i].i *= d__1;
} else {
x[i] = one;
}
}
*kase = 2;
jump = 2;
return 0;
/* ................ ENTRY (JUMP = 2)
FIRST ITERATION. X HAS BEEN OVERWRITTEN BY TRANSPOSE(A)*X. */
L40:
j = icmax1_(n, &x[0], &c__1);
--j;
iter = 2;
/* MAIN LOOP - ITERATIONS 2,3,...,ITMAX. */
L50:
for (i = 0; i < *n; ++i) x[i] = zero;
x[j] = one;
*kase = 1;
jump = 3;
return 0;
/* ................ ENTRY (JUMP = 3)
X HAS BEEN OVERWRITTEN BY A*X. */
L70:
#ifdef _CRAY
CCOPY(n, x, &c__1, v, &c__1);
#else
ccopy_(n, x, &c__1, v, &c__1);
#endif
estold = *est;
*est = scsum1_(n, v, &c__1);
L90:
/* TEST FOR CYCLING. */
if (*est <= estold) goto L120;
for (i = 0; i < *n; ++i) {
d__1 = c_abs(&x[i]);
if (d__1 > safmin) {
d__1 = 1 / d__1;
x[i].r *= d__1;
x[i].i *= d__1;
} else {
x[i] = one;
}
}
*kase = 2;
jump = 4;
return 0;
/* ................ ENTRY (JUMP = 4)
X HAS BEEN OVERWRITTEN BY TRANDPOSE(A)*X. */
L110:
jlast = j;
j = icmax1_(n, &x[0], &c__1);
--j;
if (x[jlast].r != (d__1 = x[j].r, fabs(d__1)) && iter < 5) {
++iter;
goto L50;
}
/* ITERATION COMPLETE. FINAL STAGE. */
L120:
altsgn = 1.;
for (i = 1; i <= *n; ++i) {
x[i-1].r = altsgn * ((float)(i - 1) / (float)(*n - 1) + 1.);
x[i-1].i = 0.;
altsgn = -altsgn;
}
*kase = 1;
jump = 5;
return 0;
/* ................ ENTRY (JUMP = 5)
X HAS BEEN OVERWRITTEN BY A*X. */
L140:
temp = scsum1_(n, x, &c__1) / (float)(*n * 3) * 2.;
if (temp > *est) {
#ifdef _CRAY
CCOPY(n, &x[0], &c__1, &v[0], &c__1);
#else
ccopy_(n, &x[0], &c__1, &v[0], &c__1);
#endif
*est = temp;
}
L150:
*kase = 0;
return 0;
} /* clacon_ */
/* Subroutine */
int clacon_(integer *n, complex *v, complex *x, real *est, integer *kase)
{
/* System generated locals */
integer i__1, i__2, i__3;
real r__1, r__2;
complex q__1;
/* Builtin functions */
double c_abs(complex *), r_imag(complex *);
/* Local variables */
static integer i__, j, iter;
static real temp;
static integer jump;
static real absxi;
static integer jlast;
extern /* Subroutine */
int ccopy_(integer *, complex *, integer *, complex *, integer *);
extern integer icmax1_(integer *, complex *, integer *);
extern real scsum1_(integer *, complex *, integer *), slamch_(char *);
static real safmin, altsgn, estold;
/* -- LAPACK auxiliary routine (version 3.4.2) -- */
/* -- LAPACK is a software package provided by Univ. of Tennessee, -- */
/* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- */
/* September 2012 */
/* .. Scalar Arguments .. */
/* .. */
/* .. Array Arguments .. */
/* .. */
/* ===================================================================== */
/* .. Parameters .. */
/* .. */
/* .. Local Scalars .. */
/* .. */
/* .. External Functions .. */
/* .. */
/* .. External Subroutines .. */
/* .. */
/* .. Intrinsic Functions .. */
/* .. */
/* .. Save statement .. */
/* .. */
/* .. Executable Statements .. */
/* Parameter adjustments */
--x;
--v;
/* Function Body */
safmin = slamch_("Safe minimum");
if (*kase == 0)
{
i__1 = *n;
for (i__ = 1;
i__ <= i__1;
++i__)
{
i__2 = i__;
r__1 = 1.f / (real) (*n);
q__1.r = r__1;
q__1.i = 0.f; // , expr subst
x[i__2].r = q__1.r;
x[i__2].i = q__1.i; // , expr subst
/* L10: */
}
*kase = 1;
jump = 1;
return 0;
}
switch (jump)
{
case 1:
goto L20;
case 2:
goto L40;
case 3:
goto L70;
case 4:
goto L90;
case 5:
goto L120;
}
/* ................ ENTRY (JUMP = 1) */
/* FIRST ITERATION. X HAS BEEN OVERWRITTEN BY A*X. */
L20:
if (*n == 1)
{
v[1].r = x[1].r;
v[1].i = x[1].i; // , expr subst
*est = c_abs(&v[1]);
/* ... QUIT */
goto L130;
}
*est = scsum1_(n, &x[1], &c__1);
i__1 = *n;
for (i__ = 1;
i__ <= i__1;
++i__)
{
absxi = c_abs(&x[i__]);
if (absxi > safmin)
{
i__2 = i__;
i__3 = i__;
r__1 = x[i__3].r / absxi;
r__2 = r_imag(&x[i__]) / absxi;
q__1.r = r__1;
q__1.i = r__2; // , expr subst
x[i__2].r = q__1.r;
x[i__2].i = q__1.i; // , expr subst
}
else
{
i__2 = i__;
x[i__2].r = 1.f;
x[i__2].i = 0.f; // , expr subst
}
/* L30: */
}
*kase = 2;
jump = 2;
return 0;
/* ................ ENTRY (JUMP = 2) */
/* FIRST ITERATION. X HAS BEEN OVERWRITTEN BY CTRANS(A)*X. */
L40:
j = icmax1_(n, &x[1], &c__1);
iter = 2;
/* MAIN LOOP - ITERATIONS 2,3,...,ITMAX. */
L50:
i__1 = *n;
for (i__ = 1;
i__ <= i__1;
++i__)
{
i__2 = i__;
x[i__2].r = 0.f;
x[i__2].i = 0.f; // , expr subst
/* L60: */
}
i__1 = j;
x[i__1].r = 1.f;
x[i__1].i = 0.f; // , expr subst
*kase = 1;
jump = 3;
return 0;
/* ................ ENTRY (JUMP = 3) */
/* X HAS BEEN OVERWRITTEN BY A*X. */
L70:
ccopy_(n, &x[1], &c__1, &v[1], &c__1);
estold = *est;
*est = scsum1_(n, &v[1], &c__1);
/* TEST FOR CYCLING. */
if (*est <= estold)
{
goto L100;
}
i__1 = *n;
for (i__ = 1;
i__ <= i__1;
++i__)
{
absxi = c_abs(&x[i__]);
if (absxi > safmin)
{
i__2 = i__;
i__3 = i__;
r__1 = x[i__3].r / absxi;
r__2 = r_imag(&x[i__]) / absxi;
q__1.r = r__1;
q__1.i = r__2; // , expr subst
x[i__2].r = q__1.r;
x[i__2].i = q__1.i; // , expr subst
}
else
{
i__2 = i__;
x[i__2].r = 1.f;
x[i__2].i = 0.f; // , expr subst
}
/* L80: */
}
*kase = 2;
jump = 4;
return 0;
/* ................ ENTRY (JUMP = 4) */
/* X HAS BEEN OVERWRITTEN BY CTRANS(A)*X. */
L90:
jlast = j;
j = icmax1_(n, &x[1], &c__1);
if (c_abs(&x[jlast]) != c_abs(&x[j]) && iter < 5)
{
++iter;
goto L50;
}
/* ITERATION COMPLETE. FINAL STAGE. */
L100:
altsgn = 1.f;
i__1 = *n;
for (i__ = 1;
i__ <= i__1;
++i__)
{
i__2 = i__;
r__1 = altsgn * ((real) (i__ - 1) / (real) (*n - 1) + 1.f);
q__1.r = r__1;
q__1.i = 0.f; // , expr subst
x[i__2].r = q__1.r;
x[i__2].i = q__1.i; // , expr subst
altsgn = -altsgn;
/* L110: */
}
*kase = 1;
jump = 5;
return 0;
/* ................ ENTRY (JUMP = 5) */
/* X HAS BEEN OVERWRITTEN BY A*X. */
L120:
temp = scsum1_(n, &x[1], &c__1) / (real) (*n * 3) * 2.f;
if (temp > *est)
{
ccopy_(n, &x[1], &c__1, &v[1], &c__1);
*est = temp;
}
L130:
*kase = 0;
return 0;
/* End of CLACON */
}
