14 typedef long long BLASLONG;
15 typedef unsigned long long BLASULONG;
17 typedef long BLASLONG;
18 typedef unsigned long BLASULONG;
22 typedef BLASLONG blasint;
24 #define blasabs(x) llabs(x)
26 #define blasabs(x) labs(x)
30 #define blasabs(x) abs(x)
33 typedef blasint integer;
35 typedef unsigned int uinteger;
36 typedef char *address;
37 typedef short int shortint;
39 typedef double doublereal;
40 typedef struct { real r, i; } complex;
41 typedef struct { doublereal r, i; } doublecomplex;
43 static inline _Fcomplex Cf(complex *z) {_Fcomplex zz={z->r , z->i}; return zz;}
44 static inline _Dcomplex Cd(doublecomplex *z) {_Dcomplex zz={z->r , z->i};return zz;}
45 static inline _Fcomplex * _pCf(complex *z) {return (_Fcomplex*)z;}
46 static inline _Dcomplex * _pCd(doublecomplex *z) {return (_Dcomplex*)z;}
48 static inline _Complex float Cf(complex *z) {return z->r + z->i*_Complex_I;}
49 static inline _Complex double Cd(doublecomplex *z) {return z->r + z->i*_Complex_I;}
50 static inline _Complex float * _pCf(complex *z) {return (_Complex float*)z;}
51 static inline _Complex double * _pCd(doublecomplex *z) {return (_Complex double*)z;}
53 #define pCf(z) (*_pCf(z))
54 #define pCd(z) (*_pCd(z))
56 typedef short int shortlogical;
57 typedef char logical1;
58 typedef char integer1;
63 /* Extern is for use with -E */
74 /*external read, write*/
83 /*internal read, write*/
113 /*rewind, backspace, endfile*/
125 ftnint *inex; /*parameters in standard's order*/
151 union Multitype { /* for multiple entry points */
162 typedef union Multitype Multitype;
164 struct Vardesc { /* for Namelist */
170 typedef struct Vardesc Vardesc;
177 typedef struct Namelist Namelist;
179 #define abs(x) ((x) >= 0 ? (x) : -(x))
180 #define dabs(x) (fabs(x))
181 #define f2cmin(a,b) ((a) <= (b) ? (a) : (b))
182 #define f2cmax(a,b) ((a) >= (b) ? (a) : (b))
183 #define dmin(a,b) (f2cmin(a,b))
184 #define dmax(a,b) (f2cmax(a,b))
185 #define bit_test(a,b) ((a) >> (b) & 1)
186 #define bit_clear(a,b) ((a) & ~((uinteger)1 << (b)))
187 #define bit_set(a,b) ((a) | ((uinteger)1 << (b)))
189 #define abort_() { sig_die("Fortran abort routine called", 1); }
190 #define c_abs(z) (cabsf(Cf(z)))
191 #define c_cos(R,Z) { pCf(R)=ccos(Cf(Z)); }
193 #define c_div(c, a, b) {Cf(c)._Val[0] = (Cf(a)._Val[0]/Cf(b)._Val[0]); Cf(c)._Val[1]=(Cf(a)._Val[1]/Cf(b)._Val[1]);}
194 #define z_div(c, a, b) {Cd(c)._Val[0] = (Cd(a)._Val[0]/Cd(b)._Val[0]); Cd(c)._Val[1]=(Cd(a)._Val[1]/df(b)._Val[1]);}
196 #define c_div(c, a, b) {pCf(c) = Cf(a)/Cf(b);}
197 #define z_div(c, a, b) {pCd(c) = Cd(a)/Cd(b);}
199 #define c_exp(R, Z) {pCf(R) = cexpf(Cf(Z));}
200 #define c_log(R, Z) {pCf(R) = clogf(Cf(Z));}
201 #define c_sin(R, Z) {pCf(R) = csinf(Cf(Z));}
202 //#define c_sqrt(R, Z) {*(R) = csqrtf(Cf(Z));}
203 #define c_sqrt(R, Z) {pCf(R) = csqrtf(Cf(Z));}
204 #define d_abs(x) (fabs(*(x)))
205 #define d_acos(x) (acos(*(x)))
206 #define d_asin(x) (asin(*(x)))
207 #define d_atan(x) (atan(*(x)))
208 #define d_atn2(x, y) (atan2(*(x),*(y)))
209 #define d_cnjg(R, Z) { pCd(R) = conj(Cd(Z)); }
210 #define r_cnjg(R, Z) { pCf(R) = conjf(Cf(Z)); }
211 #define d_cos(x) (cos(*(x)))
212 #define d_cosh(x) (cosh(*(x)))
213 #define d_dim(__a, __b) ( *(__a) > *(__b) ? *(__a) - *(__b) : 0.0 )
214 #define d_exp(x) (exp(*(x)))
215 #define d_imag(z) (cimag(Cd(z)))
216 #define r_imag(z) (cimagf(Cf(z)))
217 #define d_int(__x) (*(__x)>0 ? floor(*(__x)) : -floor(- *(__x)))
218 #define r_int(__x) (*(__x)>0 ? floor(*(__x)) : -floor(- *(__x)))
219 #define d_lg10(x) ( 0.43429448190325182765 * log(*(x)) )
220 #define r_lg10(x) ( 0.43429448190325182765 * log(*(x)) )
221 #define d_log(x) (log(*(x)))
222 #define d_mod(x, y) (fmod(*(x), *(y)))
223 #define u_nint(__x) ((__x)>=0 ? floor((__x) + .5) : -floor(.5 - (__x)))
224 #define d_nint(x) u_nint(*(x))
225 #define u_sign(__a,__b) ((__b) >= 0 ? ((__a) >= 0 ? (__a) : -(__a)) : -((__a) >= 0 ? (__a) : -(__a)))
226 #define d_sign(a,b) u_sign(*(a),*(b))
227 #define r_sign(a,b) u_sign(*(a),*(b))
228 #define d_sin(x) (sin(*(x)))
229 #define d_sinh(x) (sinh(*(x)))
230 #define d_sqrt(x) (sqrt(*(x)))
231 #define d_tan(x) (tan(*(x)))
232 #define d_tanh(x) (tanh(*(x)))
233 #define i_abs(x) abs(*(x))
234 #define i_dnnt(x) ((integer)u_nint(*(x)))
235 #define i_len(s, n) (n)
236 #define i_nint(x) ((integer)u_nint(*(x)))
237 #define i_sign(a,b) ((integer)u_sign((integer)*(a),(integer)*(b)))
238 #define pow_dd(ap, bp) ( pow(*(ap), *(bp)))
239 #define pow_si(B,E) spow_ui(*(B),*(E))
240 #define pow_ri(B,E) spow_ui(*(B),*(E))
241 #define pow_di(B,E) dpow_ui(*(B),*(E))
242 #define pow_zi(p, a, b) {pCd(p) = zpow_ui(Cd(a), *(b));}
243 #define pow_ci(p, a, b) {pCf(p) = cpow_ui(Cf(a), *(b));}
244 #define pow_zz(R,A,B) {pCd(R) = cpow(Cd(A),*(B));}
245 #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++ = ' '; }
246 #define s_cmp(a,b,c,d) ((integer)strncmp((a),(b),f2cmin((c),(d))))
247 #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]; }
248 #define sig_die(s, kill) { exit(1); }
249 #define s_stop(s, n) {exit(0);}
250 static char junk[] = "\n@(#)LIBF77 VERSION 19990503\n";
251 #define z_abs(z) (cabs(Cd(z)))
252 #define z_exp(R, Z) {pCd(R) = cexp(Cd(Z));}
253 #define z_sqrt(R, Z) {pCd(R) = csqrt(Cd(Z));}
254 #define myexit_() break;
255 #define mycycle() continue;
256 #define myceiling(w) {ceil(w)}
257 #define myhuge(w) {HUGE_VAL}
258 //#define mymaxloc_(w,s,e,n) {if (sizeof(*(w)) == sizeof(double)) dmaxloc_((w),*(s),*(e),n); else dmaxloc_((w),*(s),*(e),n);}
259 #define mymaxloc(w,s,e,n) {dmaxloc_(w,*(s),*(e),n)}
261 /* procedure parameter types for -A and -C++ */
263 #define F2C_proc_par_types 1
265 typedef logical (*L_fp)(...);
267 typedef logical (*L_fp)();
270 static float spow_ui(float x, integer n) {
271 float pow=1.0; unsigned long int u;
273 if(n < 0) n = -n, x = 1/x;
282 static double dpow_ui(double x, integer n) {
283 double pow=1.0; unsigned long int u;
285 if(n < 0) n = -n, x = 1/x;
295 static _Fcomplex cpow_ui(complex x, integer n) {
296 complex pow={1.0,0.0}; unsigned long int u;
298 if(n < 0) n = -n, x.r = 1/x.r, x.i=1/x.i;
300 if(u & 01) pow.r *= x.r, pow.i *= x.i;
301 if(u >>= 1) x.r *= x.r, x.i *= x.i;
305 _Fcomplex p={pow.r, pow.i};
309 static _Complex float cpow_ui(_Complex float x, integer n) {
310 _Complex float pow=1.0; unsigned long int u;
312 if(n < 0) n = -n, x = 1/x;
323 static _Dcomplex zpow_ui(_Dcomplex x, integer n) {
324 _Dcomplex pow={1.0,0.0}; unsigned long int u;
326 if(n < 0) n = -n, x._Val[0] = 1/x._Val[0], x._Val[1] =1/x._Val[1];
328 if(u & 01) pow._Val[0] *= x._Val[0], pow._Val[1] *= x._Val[1];
329 if(u >>= 1) x._Val[0] *= x._Val[0], x._Val[1] *= x._Val[1];
333 _Dcomplex p = {pow._Val[0], pow._Val[1]};
337 static _Complex double zpow_ui(_Complex double x, integer n) {
338 _Complex double pow=1.0; unsigned long int u;
340 if(n < 0) n = -n, x = 1/x;
350 static integer pow_ii(integer x, integer n) {
351 integer pow; unsigned long int u;
353 if (n == 0 || x == 1) pow = 1;
354 else if (x != -1) pow = x == 0 ? 1/x : 0;
357 if ((n > 0) || !(n == 0 || x == 1 || x != -1)) {
367 static integer dmaxloc_(double *w, integer s, integer e, integer *n)
369 double m; integer i, mi;
370 for(m=w[s-1], mi=s, i=s+1; i<=e; i++)
371 if (w[i-1]>m) mi=i ,m=w[i-1];
374 static integer smaxloc_(float *w, integer s, integer e, integer *n)
376 float m; integer i, mi;
377 for(m=w[s-1], mi=s, i=s+1; i<=e; i++)
378 if (w[i-1]>m) mi=i ,m=w[i-1];
381 static inline void cdotc_(complex *z, integer *n_, complex *x, integer *incx_, complex *y, integer *incy_) {
382 integer n = *n_, incx = *incx_, incy = *incy_, i;
384 _Fcomplex zdotc = {0.0, 0.0};
385 if (incx == 1 && incy == 1) {
386 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
387 zdotc._Val[0] += conjf(Cf(&x[i]))._Val[0] * Cf(&y[i])._Val[0];
388 zdotc._Val[1] += conjf(Cf(&x[i]))._Val[1] * Cf(&y[i])._Val[1];
391 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
392 zdotc._Val[0] += conjf(Cf(&x[i*incx]))._Val[0] * Cf(&y[i*incy])._Val[0];
393 zdotc._Val[1] += conjf(Cf(&x[i*incx]))._Val[1] * Cf(&y[i*incy])._Val[1];
399 _Complex float zdotc = 0.0;
400 if (incx == 1 && incy == 1) {
401 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
402 zdotc += conjf(Cf(&x[i])) * Cf(&y[i]);
405 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
406 zdotc += conjf(Cf(&x[i*incx])) * Cf(&y[i*incy]);
412 static inline void zdotc_(doublecomplex *z, integer *n_, doublecomplex *x, integer *incx_, doublecomplex *y, integer *incy_) {
413 integer n = *n_, incx = *incx_, incy = *incy_, i;
415 _Dcomplex zdotc = {0.0, 0.0};
416 if (incx == 1 && incy == 1) {
417 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
418 zdotc._Val[0] += conj(Cd(&x[i]))._Val[0] * Cd(&y[i])._Val[0];
419 zdotc._Val[1] += conj(Cd(&x[i]))._Val[1] * Cd(&y[i])._Val[1];
422 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
423 zdotc._Val[0] += conj(Cd(&x[i*incx]))._Val[0] * Cd(&y[i*incy])._Val[0];
424 zdotc._Val[1] += conj(Cd(&x[i*incx]))._Val[1] * Cd(&y[i*incy])._Val[1];
430 _Complex double zdotc = 0.0;
431 if (incx == 1 && incy == 1) {
432 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
433 zdotc += conj(Cd(&x[i])) * Cd(&y[i]);
436 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
437 zdotc += conj(Cd(&x[i*incx])) * Cd(&y[i*incy]);
443 static inline void cdotu_(complex *z, integer *n_, complex *x, integer *incx_, complex *y, integer *incy_) {
444 integer n = *n_, incx = *incx_, incy = *incy_, i;
446 _Fcomplex zdotc = {0.0, 0.0};
447 if (incx == 1 && incy == 1) {
448 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
449 zdotc._Val[0] += Cf(&x[i])._Val[0] * Cf(&y[i])._Val[0];
450 zdotc._Val[1] += Cf(&x[i])._Val[1] * Cf(&y[i])._Val[1];
453 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
454 zdotc._Val[0] += Cf(&x[i*incx])._Val[0] * Cf(&y[i*incy])._Val[0];
455 zdotc._Val[1] += Cf(&x[i*incx])._Val[1] * Cf(&y[i*incy])._Val[1];
461 _Complex float zdotc = 0.0;
462 if (incx == 1 && incy == 1) {
463 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
464 zdotc += Cf(&x[i]) * Cf(&y[i]);
467 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
468 zdotc += Cf(&x[i*incx]) * Cf(&y[i*incy]);
474 static inline void zdotu_(doublecomplex *z, integer *n_, doublecomplex *x, integer *incx_, doublecomplex *y, integer *incy_) {
475 integer n = *n_, incx = *incx_, incy = *incy_, i;
477 _Dcomplex zdotc = {0.0, 0.0};
478 if (incx == 1 && incy == 1) {
479 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
480 zdotc._Val[0] += Cd(&x[i])._Val[0] * Cd(&y[i])._Val[0];
481 zdotc._Val[1] += Cd(&x[i])._Val[1] * Cd(&y[i])._Val[1];
484 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
485 zdotc._Val[0] += Cd(&x[i*incx])._Val[0] * Cd(&y[i*incy])._Val[0];
486 zdotc._Val[1] += Cd(&x[i*incx])._Val[1] * Cd(&y[i*incy])._Val[1];
492 _Complex double zdotc = 0.0;
493 if (incx == 1 && incy == 1) {
494 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
495 zdotc += Cd(&x[i]) * Cd(&y[i]);
498 for (i=0;i<n;i++) { /* zdotc = zdotc + dconjg(x(i))* y(i) */
499 zdotc += Cd(&x[i*incx]) * Cd(&y[i*incy]);
505 /* -- translated by f2c (version 20000121).
506 You must link the resulting object file with the libraries:
507 -lf2c -lm (in that order)
513 /* Table of constant values */
515 static complex c_b1 = {0.f,0.f};
516 static complex c_b2 = {1.f,0.f};
517 static integer c__1 = 1;
519 /* > \brief \b CHBGST */
521 /* =========== DOCUMENTATION =========== */
523 /* Online html documentation available at */
524 /* http://www.netlib.org/lapack/explore-html/ */
527 /* > Download CHBGST + dependencies */
528 /* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/chbgst.
531 /* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/chbgst.
534 /* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/chbgst.
542 /* SUBROUTINE CHBGST( VECT, UPLO, N, KA, KB, AB, LDAB, BB, LDBB, X, */
543 /* LDX, WORK, RWORK, INFO ) */
545 /* CHARACTER UPLO, VECT */
546 /* INTEGER INFO, KA, KB, LDAB, LDBB, LDX, N */
547 /* REAL RWORK( * ) */
548 /* COMPLEX AB( LDAB, * ), BB( LDBB, * ), WORK( * ), */
552 /* > \par Purpose: */
557 /* > CHBGST reduces a complex Hermitian-definite banded generalized */
558 /* > eigenproblem A*x = lambda*B*x to standard form C*y = lambda*y, */
559 /* > such that C has the same bandwidth as A. */
561 /* > B must have been previously factorized as S**H*S by CPBSTF, using a */
562 /* > split Cholesky factorization. A is overwritten by C = X**H*A*X, where */
563 /* > X = S**(-1)*Q and Q is a unitary matrix chosen to preserve the */
564 /* > bandwidth of A. */
570 /* > \param[in] VECT */
572 /* > VECT is CHARACTER*1 */
573 /* > = 'N': do not form the transformation matrix X; */
574 /* > = 'V': form X. */
577 /* > \param[in] UPLO */
579 /* > UPLO is CHARACTER*1 */
580 /* > = 'U': Upper triangle of A is stored; */
581 /* > = 'L': Lower triangle of A is stored. */
587 /* > The order of the matrices A and B. N >= 0. */
590 /* > \param[in] KA */
592 /* > KA is INTEGER */
593 /* > The number of superdiagonals of the matrix A if UPLO = 'U', */
594 /* > or the number of subdiagonals if UPLO = 'L'. KA >= 0. */
597 /* > \param[in] KB */
599 /* > KB is INTEGER */
600 /* > The number of superdiagonals of the matrix B if UPLO = 'U', */
601 /* > or the number of subdiagonals if UPLO = 'L'. KA >= KB >= 0. */
604 /* > \param[in,out] AB */
606 /* > AB is COMPLEX array, dimension (LDAB,N) */
607 /* > On entry, the upper or lower triangle of the Hermitian band */
608 /* > matrix A, stored in the first ka+1 rows of the array. The */
609 /* > j-th column of A is stored in the j-th column of the array AB */
611 /* > if UPLO = 'U', AB(ka+1+i-j,j) = A(i,j) for f2cmax(1,j-ka)<=i<=j; */
612 /* > if UPLO = 'L', AB(1+i-j,j) = A(i,j) for j<=i<=f2cmin(n,j+ka). */
614 /* > On exit, the transformed matrix X**H*A*X, stored in the same */
618 /* > \param[in] LDAB */
620 /* > LDAB is INTEGER */
621 /* > The leading dimension of the array AB. LDAB >= KA+1. */
624 /* > \param[in] BB */
626 /* > BB is COMPLEX array, dimension (LDBB,N) */
627 /* > The banded factor S from the split Cholesky factorization of */
628 /* > B, as returned by CPBSTF, stored in the first kb+1 rows of */
632 /* > \param[in] LDBB */
634 /* > LDBB is INTEGER */
635 /* > The leading dimension of the array BB. LDBB >= KB+1. */
638 /* > \param[out] X */
640 /* > X is COMPLEX array, dimension (LDX,N) */
641 /* > If VECT = 'V', the n-by-n matrix X. */
642 /* > If VECT = 'N', the array X is not referenced. */
645 /* > \param[in] LDX */
647 /* > LDX is INTEGER */
648 /* > The leading dimension of the array X. */
649 /* > LDX >= f2cmax(1,N) if VECT = 'V'; LDX >= 1 otherwise. */
652 /* > \param[out] WORK */
654 /* > WORK is COMPLEX array, dimension (N) */
657 /* > \param[out] RWORK */
659 /* > RWORK is REAL array, dimension (N) */
662 /* > \param[out] INFO */
664 /* > INFO is INTEGER */
665 /* > = 0: successful exit */
666 /* > < 0: if INFO = -i, the i-th argument had an illegal value. */
672 /* > \author Univ. of Tennessee */
673 /* > \author Univ. of California Berkeley */
674 /* > \author Univ. of Colorado Denver */
675 /* > \author NAG Ltd. */
677 /* > \date December 2016 */
679 /* > \ingroup complexOTHERcomputational */
681 /* ===================================================================== */
682 /* Subroutine */ int chbgst_(char *vect, char *uplo, integer *n, integer *ka,
683 integer *kb, complex *ab, integer *ldab, complex *bb, integer *ldbb,
684 complex *x, integer *ldx, complex *work, real *rwork, integer *info)
686 /* System generated locals */
687 integer ab_dim1, ab_offset, bb_dim1, bb_offset, x_dim1, x_offset, i__1,
688 i__2, i__3, i__4, i__5, i__6, i__7, i__8;
690 complex q__1, q__2, q__3, q__4, q__5, q__6, q__7, q__8, q__9, q__10;
692 /* Local variables */
694 extern /* Subroutine */ int crot_(integer *, complex *, integer *,
695 complex *, integer *, real *, complex *);
696 integer i__, j, k, l, m;
697 extern /* Subroutine */ int cgerc_(integer *, integer *, complex *,
698 complex *, integer *, complex *, integer *, complex *, integer *);
700 extern logical lsame_(char *, char *);
701 extern /* Subroutine */ int cgeru_(integer *, integer *, complex *,
702 complex *, integer *, complex *, integer *, complex *, integer *);
707 extern /* Subroutine */ int clar2v_(integer *, complex *, complex *,
708 complex *, integer *, real *, complex *, integer *);
710 extern /* Subroutine */ int clacgv_(integer *, complex *, integer *);
712 extern /* Subroutine */ int csscal_(integer *, real *, complex *, integer
713 *), claset_(char *, integer *, integer *, complex *, complex *,
714 complex *, integer *), clartg_(complex *, complex *, real
715 *, complex *, complex *), xerbla_(char *, integer *, ftnlen),
716 clargv_(integer *, complex *, integer *, complex *, integer *,
719 extern /* Subroutine */ int clartv_(integer *, complex *, integer *,
720 complex *, integer *, real *, complex *, integer *);
728 /* -- LAPACK computational routine (version 3.7.0) -- */
729 /* -- LAPACK is a software package provided by Univ. of Tennessee, -- */
730 /* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- */
734 /* ===================================================================== */
737 /* Test the input parameters */
739 /* Parameter adjustments */
741 ab_offset = 1 + ab_dim1 * 1;
744 bb_offset = 1 + bb_dim1 * 1;
747 x_offset = 1 + x_dim1 * 1;
753 wantx = lsame_(vect, "V");
754 upper = lsame_(uplo, "U");
758 if (! wantx && ! lsame_(vect, "N")) {
760 } else if (! upper && ! lsame_(uplo, "L")) {
764 } else if (*ka < 0) {
766 } else if (*kb < 0 || *kb > *ka) {
768 } else if (*ldab < *ka + 1) {
770 } else if (*ldbb < *kb + 1) {
772 } else if (*ldx < 1 || wantx && *ldx < f2cmax(1,*n)) {
777 xerbla_("CHBGST", &i__1, (ftnlen)6);
781 /* Quick return if possible */
789 /* Initialize X to the unit matrix, if needed */
792 claset_("Full", n, n, &c_b1, &c_b2, &x[x_offset], ldx);
795 /* Set M to the splitting point m. It must be the same value as is */
796 /* used in CPBSTF. The chosen value allows the arrays WORK and RWORK */
797 /* to be of dimension (N). */
801 /* The routine works in two phases, corresponding to the two halves */
802 /* of the split Cholesky factorization of B as S**H*S where */
807 /* with U upper triangular of order m, and L lower triangular of */
808 /* order n-m. S has the same bandwidth as B. */
810 /* S is treated as a product of elementary matrices: */
812 /* S = S(m)*S(m-1)*...*S(2)*S(1)*S(m+1)*S(m+2)*...*S(n-1)*S(n) */
814 /* where S(i) is determined by the i-th row of S. */
816 /* In phase 1, the index i takes the values n, n-1, ... , m+1; */
817 /* in phase 2, it takes the values 1, 2, ... , m. */
819 /* For each value of i, the current matrix A is updated by forming */
820 /* inv(S(i))**H*A*inv(S(i)). This creates a triangular bulge outside */
821 /* the band of A. The bulge is then pushed down toward the bottom of */
822 /* A in phase 1, and up toward the top of A in phase 2, by applying */
823 /* plane rotations. */
825 /* There are kb*(kb+1)/2 elements in the bulge, but at most 2*kb-1 */
826 /* of them are linearly independent, so annihilating a bulge requires */
827 /* only 2*kb-1 plane rotations. The rotations are divided into a 1st */
828 /* set of kb-1 rotations, and a 2nd set of kb rotations. */
830 /* Wherever possible, rotations are generated and applied in vector */
831 /* operations of length NR between the indices J1 and J2 (sometimes */
832 /* replaced by modified values NRT, J1T or J2T). */
834 /* The real cosines and complex sines of the rotations are stored in */
835 /* the arrays RWORK and WORK, those of the 1st set in elements */
836 /* 2:m-kb-1, and those of the 2nd set in elements m-kb+1:n. */
838 /* The bulges are not formed explicitly; nonzero elements outside the */
839 /* band are created only when they are required for generating new */
840 /* rotations; they are stored in the array WORK, in positions where */
841 /* they are later overwritten by the sines of the rotations which */
842 /* annihilate them. */
844 /* **************************** Phase 1 ***************************** */
846 /* The logical structure of this phase is: */
848 /* UPDATE = .TRUE. */
849 /* DO I = N, M + 1, -1 */
850 /* use S(i) to update A and create a new bulge */
851 /* apply rotations to push all bulges KA positions downward */
853 /* UPDATE = .FALSE. */
854 /* DO I = M + KA + 1, N - 1 */
855 /* apply rotations to push all bulges KA positions downward */
858 /* To avoid duplicating code, the two loops are merged. */
866 i__1 = *kb, i__2 = i__ - 1;
867 kbt = f2cmin(i__1,i__2);
870 i__1 = *n, i__2 = i__ + *ka;
871 i1 = f2cmin(i__1,i__2);
872 i2 = i__ - kbt + ka1;
891 /* Transform A, working with the upper triangle */
895 /* Form inv(S(i))**H * A * inv(S(i)) */
897 i__1 = kb1 + i__ * bb_dim1;
899 i__1 = ka1 + i__ * ab_dim1;
900 i__2 = ka1 + i__ * ab_dim1;
901 r__1 = ab[i__2].r / bii / bii;
902 ab[i__1].r = r__1, ab[i__1].i = 0.f;
904 for (j = i__ + 1; j <= i__1; ++j) {
905 i__2 = i__ - j + ka1 + j * ab_dim1;
906 i__3 = i__ - j + ka1 + j * ab_dim1;
907 q__1.r = ab[i__3].r / bii, q__1.i = ab[i__3].i / bii;
908 ab[i__2].r = q__1.r, ab[i__2].i = q__1.i;
912 i__1 = 1, i__2 = i__ - *ka;
914 for (j = f2cmax(i__1,i__2); j <= i__3; ++j) {
915 i__1 = j - i__ + ka1 + i__ * ab_dim1;
916 i__2 = j - i__ + ka1 + i__ * ab_dim1;
917 q__1.r = ab[i__2].r / bii, q__1.i = ab[i__2].i / bii;
918 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
922 for (k = i__ - kbt; k <= i__3; ++k) {
924 for (j = i__ - kbt; j <= i__1; ++j) {
925 i__2 = j - k + ka1 + k * ab_dim1;
926 i__4 = j - k + ka1 + k * ab_dim1;
927 i__5 = j - i__ + kb1 + i__ * bb_dim1;
928 r_cnjg(&q__5, &ab[k - i__ + ka1 + i__ * ab_dim1]);
929 q__4.r = bb[i__5].r * q__5.r - bb[i__5].i * q__5.i,
930 q__4.i = bb[i__5].r * q__5.i + bb[i__5].i *
932 q__3.r = ab[i__4].r - q__4.r, q__3.i = ab[i__4].i -
934 r_cnjg(&q__7, &bb[k - i__ + kb1 + i__ * bb_dim1]);
935 i__6 = j - i__ + ka1 + i__ * ab_dim1;
936 q__6.r = q__7.r * ab[i__6].r - q__7.i * ab[i__6].i,
937 q__6.i = q__7.r * ab[i__6].i + q__7.i * ab[i__6]
939 q__2.r = q__3.r - q__6.r, q__2.i = q__3.i - q__6.i;
940 i__7 = ka1 + i__ * ab_dim1;
942 i__8 = j - i__ + kb1 + i__ * bb_dim1;
943 q__9.r = r__1 * bb[i__8].r, q__9.i = r__1 * bb[i__8].i;
944 r_cnjg(&q__10, &bb[k - i__ + kb1 + i__ * bb_dim1]);
945 q__8.r = q__9.r * q__10.r - q__9.i * q__10.i, q__8.i =
946 q__9.r * q__10.i + q__9.i * q__10.r;
947 q__1.r = q__2.r + q__8.r, q__1.i = q__2.i + q__8.i;
948 ab[i__2].r = q__1.r, ab[i__2].i = q__1.i;
952 i__1 = 1, i__2 = i__ - *ka;
953 i__4 = i__ - kbt - 1;
954 for (j = f2cmax(i__1,i__2); j <= i__4; ++j) {
955 i__1 = j - k + ka1 + k * ab_dim1;
956 i__2 = j - k + ka1 + k * ab_dim1;
957 r_cnjg(&q__3, &bb[k - i__ + kb1 + i__ * bb_dim1]);
958 i__5 = j - i__ + ka1 + i__ * ab_dim1;
959 q__2.r = q__3.r * ab[i__5].r - q__3.i * ab[i__5].i,
960 q__2.i = q__3.r * ab[i__5].i + q__3.i * ab[i__5]
962 q__1.r = ab[i__2].r - q__2.r, q__1.i = ab[i__2].i -
964 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
970 for (j = i__; j <= i__3; ++j) {
972 i__4 = j - *ka, i__1 = i__ - kbt;
974 for (k = f2cmax(i__4,i__1); k <= i__2; ++k) {
975 i__4 = k - j + ka1 + j * ab_dim1;
976 i__1 = k - j + ka1 + j * ab_dim1;
977 i__5 = k - i__ + kb1 + i__ * bb_dim1;
978 i__6 = i__ - j + ka1 + j * ab_dim1;
979 q__2.r = bb[i__5].r * ab[i__6].r - bb[i__5].i * ab[i__6]
980 .i, q__2.i = bb[i__5].r * ab[i__6].i + bb[i__5].i
982 q__1.r = ab[i__1].r - q__2.r, q__1.i = ab[i__1].i -
984 ab[i__4].r = q__1.r, ab[i__4].i = q__1.i;
992 /* post-multiply X by inv(S(i)) */
996 csscal_(&i__3, &r__1, &x[m + 1 + i__ * x_dim1], &c__1);
999 q__1.r = -1.f, q__1.i = 0.f;
1000 cgerc_(&i__3, &kbt, &q__1, &x[m + 1 + i__ * x_dim1], &
1001 c__1, &bb[kb1 - kbt + i__ * bb_dim1], &c__1, &x[m
1002 + 1 + (i__ - kbt) * x_dim1], ldx);
1006 /* store a(i,i1) in RA1 for use in next loop over K */
1008 i__3 = i__ - i1 + ka1 + i1 * ab_dim1;
1009 ra1.r = ab[i__3].r, ra1.i = ab[i__3].i;
1012 /* Generate and apply vectors of rotations to chase all the */
1013 /* existing bulges KA positions down toward the bottom of the */
1017 for (k = 1; k <= i__3; ++k) {
1020 /* Determine the rotations which would annihilate the bulge */
1021 /* which has in theory just been created */
1023 if (i__ - k + *ka < *n && i__ - k > 1) {
1025 /* generate rotation to annihilate a(i,i-k+ka+1) */
1027 clartg_(&ab[k + 1 + (i__ - k + *ka) * ab_dim1], &ra1, &
1028 rwork[i__ - k + *ka - m], &work[i__ - k + *ka - m]
1031 /* create nonzero element a(i-k,i-k+ka+1) outside the */
1032 /* band and store it in WORK(i-k) */
1034 i__2 = kb1 - k + i__ * bb_dim1;
1035 q__2.r = -bb[i__2].r, q__2.i = -bb[i__2].i;
1036 q__1.r = q__2.r * ra1.r - q__2.i * ra1.i, q__1.i = q__2.r
1037 * ra1.i + q__2.i * ra1.r;
1038 t.r = q__1.r, t.i = q__1.i;
1040 i__4 = i__ - k + *ka - m;
1041 q__2.r = rwork[i__4] * t.r, q__2.i = rwork[i__4] * t.i;
1042 r_cnjg(&q__4, &work[i__ - k + *ka - m]);
1043 i__1 = (i__ - k + *ka) * ab_dim1 + 1;
1044 q__3.r = q__4.r * ab[i__1].r - q__4.i * ab[i__1].i,
1045 q__3.i = q__4.r * ab[i__1].i + q__4.i * ab[i__1]
1047 q__1.r = q__2.r - q__3.r, q__1.i = q__2.i - q__3.i;
1048 work[i__2].r = q__1.r, work[i__2].i = q__1.i;
1049 i__2 = (i__ - k + *ka) * ab_dim1 + 1;
1050 i__4 = i__ - k + *ka - m;
1051 q__2.r = work[i__4].r * t.r - work[i__4].i * t.i, q__2.i =
1052 work[i__4].r * t.i + work[i__4].i * t.r;
1053 i__1 = i__ - k + *ka - m;
1054 i__5 = (i__ - k + *ka) * ab_dim1 + 1;
1055 q__3.r = rwork[i__1] * ab[i__5].r, q__3.i = rwork[i__1] *
1057 q__1.r = q__2.r + q__3.r, q__1.i = q__2.i + q__3.i;
1058 ab[i__2].r = q__1.r, ab[i__2].i = q__1.i;
1059 ra1.r = ra.r, ra1.i = ra.i;
1063 i__2 = 1, i__4 = k - i0 + 2;
1064 j2 = i__ - k - 1 + f2cmax(i__2,i__4) * ka1;
1065 nr = (*n - j2 + *ka) / ka1;
1066 j1 = j2 + (nr - 1) * ka1;
1069 i__2 = j2, i__4 = i__ + (*ka << 1) - k + 1;
1070 j2t = f2cmax(i__2,i__4);
1074 nrt = (*n - j2t + *ka) / ka1;
1077 for (j = j2t; i__4 < 0 ? j >= i__2 : j <= i__2; j += i__4) {
1079 /* create nonzero element a(j-ka,j+1) outside the band */
1080 /* and store it in WORK(j-m) */
1084 i__6 = (j + 1) * ab_dim1 + 1;
1085 q__1.r = work[i__5].r * ab[i__6].r - work[i__5].i * ab[i__6]
1086 .i, q__1.i = work[i__5].r * ab[i__6].i + work[i__5].i
1088 work[i__1].r = q__1.r, work[i__1].i = q__1.i;
1089 i__1 = (j + 1) * ab_dim1 + 1;
1091 i__6 = (j + 1) * ab_dim1 + 1;
1092 q__1.r = rwork[i__5] * ab[i__6].r, q__1.i = rwork[i__5] * ab[
1094 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
1098 /* generate rotations in 1st set to annihilate elements which */
1099 /* have been created outside the band */
1102 clargv_(&nrt, &ab[j2t * ab_dim1 + 1], &inca, &work[j2t - m], &
1103 ka1, &rwork[j2t - m], &ka1);
1107 /* apply rotations in 1st set from the right */
1110 for (l = 1; l <= i__4; ++l) {
1111 clartv_(&nr, &ab[ka1 - l + j2 * ab_dim1], &inca, &ab[*ka
1112 - l + (j2 + 1) * ab_dim1], &inca, &rwork[j2 - m],
1113 &work[j2 - m], &ka1);
1117 /* apply rotations in 1st set from both sides to diagonal */
1120 clar2v_(&nr, &ab[ka1 + j2 * ab_dim1], &ab[ka1 + (j2 + 1) *
1121 ab_dim1], &ab[*ka + (j2 + 1) * ab_dim1], &inca, &
1122 rwork[j2 - m], &work[j2 - m], &ka1);
1124 clacgv_(&nr, &work[j2 - m], &ka1);
1127 /* start applying rotations in 1st set from the left */
1130 for (l = *ka - 1; l >= i__4; --l) {
1131 nrt = (*n - j2 + l) / ka1;
1133 clartv_(&nrt, &ab[l + (j2 + ka1 - l) * ab_dim1], &inca, &
1134 ab[l + 1 + (j2 + ka1 - l) * ab_dim1], &inca, &
1135 rwork[j2 - m], &work[j2 - m], &ka1);
1142 /* post-multiply X by product of rotations in 1st set */
1146 for (j = j2; i__2 < 0 ? j >= i__4 : j <= i__4; j += i__2) {
1148 r_cnjg(&q__1, &work[j - m]);
1149 crot_(&i__1, &x[m + 1 + j * x_dim1], &c__1, &x[m + 1 + (j
1150 + 1) * x_dim1], &c__1, &rwork[j - m], &q__1);
1158 if (i2 <= *n && kbt > 0) {
1160 /* create nonzero element a(i-kbt,i-kbt+ka+1) outside the */
1161 /* band and store it in WORK(i-kbt) */
1164 i__2 = kb1 - kbt + i__ * bb_dim1;
1165 q__2.r = -bb[i__2].r, q__2.i = -bb[i__2].i;
1166 q__1.r = q__2.r * ra1.r - q__2.i * ra1.i, q__1.i = q__2.r *
1167 ra1.i + q__2.i * ra1.r;
1168 work[i__3].r = q__1.r, work[i__3].i = q__1.i;
1172 for (k = *kb; k >= 1; --k) {
1175 i__3 = 2, i__2 = k - i0 + 1;
1176 j2 = i__ - k - 1 + f2cmax(i__3,i__2) * ka1;
1179 i__3 = 1, i__2 = k - i0 + 1;
1180 j2 = i__ - k - 1 + f2cmax(i__3,i__2) * ka1;
1183 /* finish applying rotations in 2nd set from the left */
1185 for (l = *kb - k; l >= 1; --l) {
1186 nrt = (*n - j2 + *ka + l) / ka1;
1188 clartv_(&nrt, &ab[l + (j2 - l + 1) * ab_dim1], &inca, &ab[
1189 l + 1 + (j2 - l + 1) * ab_dim1], &inca, &rwork[j2
1190 - *ka], &work[j2 - *ka], &ka1);
1194 nr = (*n - j2 + *ka) / ka1;
1195 j1 = j2 + (nr - 1) * ka1;
1198 for (j = j1; i__2 < 0 ? j >= i__3 : j <= i__3; j += i__2) {
1201 work[i__4].r = work[i__1].r, work[i__4].i = work[i__1].i;
1202 rwork[j] = rwork[j - *ka];
1207 for (j = j2; i__3 < 0 ? j >= i__2 : j <= i__2; j += i__3) {
1209 /* create nonzero element a(j-ka,j+1) outside the band */
1210 /* and store it in WORK(j) */
1214 i__5 = (j + 1) * ab_dim1 + 1;
1215 q__1.r = work[i__1].r * ab[i__5].r - work[i__1].i * ab[i__5]
1216 .i, q__1.i = work[i__1].r * ab[i__5].i + work[i__1].i
1218 work[i__4].r = q__1.r, work[i__4].i = q__1.i;
1219 i__4 = (j + 1) * ab_dim1 + 1;
1221 i__5 = (j + 1) * ab_dim1 + 1;
1222 q__1.r = rwork[i__1] * ab[i__5].r, q__1.i = rwork[i__1] * ab[
1224 ab[i__4].r = q__1.r, ab[i__4].i = q__1.i;
1228 if (i__ - k < *n - *ka && k <= kbt) {
1229 i__3 = i__ - k + *ka;
1231 work[i__3].r = work[i__2].r, work[i__3].i = work[i__2].i;
1237 for (k = *kb; k >= 1; --k) {
1239 i__3 = 1, i__2 = k - i0 + 1;
1240 j2 = i__ - k - 1 + f2cmax(i__3,i__2) * ka1;
1241 nr = (*n - j2 + *ka) / ka1;
1242 j1 = j2 + (nr - 1) * ka1;
1245 /* generate rotations in 2nd set to annihilate elements */
1246 /* which have been created outside the band */
1248 clargv_(&nr, &ab[j2 * ab_dim1 + 1], &inca, &work[j2], &ka1, &
1251 /* apply rotations in 2nd set from the right */
1254 for (l = 1; l <= i__3; ++l) {
1255 clartv_(&nr, &ab[ka1 - l + j2 * ab_dim1], &inca, &ab[*ka
1256 - l + (j2 + 1) * ab_dim1], &inca, &rwork[j2], &
1261 /* apply rotations in 2nd set from both sides to diagonal */
1264 clar2v_(&nr, &ab[ka1 + j2 * ab_dim1], &ab[ka1 + (j2 + 1) *
1265 ab_dim1], &ab[*ka + (j2 + 1) * ab_dim1], &inca, &
1266 rwork[j2], &work[j2], &ka1);
1268 clacgv_(&nr, &work[j2], &ka1);
1271 /* start applying rotations in 2nd set from the left */
1274 for (l = *ka - 1; l >= i__3; --l) {
1275 nrt = (*n - j2 + l) / ka1;
1277 clartv_(&nrt, &ab[l + (j2 + ka1 - l) * ab_dim1], &inca, &
1278 ab[l + 1 + (j2 + ka1 - l) * ab_dim1], &inca, &
1279 rwork[j2], &work[j2], &ka1);
1286 /* post-multiply X by product of rotations in 2nd set */
1290 for (j = j2; i__2 < 0 ? j >= i__3 : j <= i__3; j += i__2) {
1292 r_cnjg(&q__1, &work[j]);
1293 crot_(&i__4, &x[m + 1 + j * x_dim1], &c__1, &x[m + 1 + (j
1294 + 1) * x_dim1], &c__1, &rwork[j], &q__1);
1302 for (k = 1; k <= i__2; ++k) {
1304 i__3 = 1, i__4 = k - i0 + 2;
1305 j2 = i__ - k - 1 + f2cmax(i__3,i__4) * ka1;
1307 /* finish applying rotations in 1st set from the left */
1309 for (l = *kb - k; l >= 1; --l) {
1310 nrt = (*n - j2 + l) / ka1;
1312 clartv_(&nrt, &ab[l + (j2 + ka1 - l) * ab_dim1], &inca, &
1313 ab[l + 1 + (j2 + ka1 - l) * ab_dim1], &inca, &
1314 rwork[j2 - m], &work[j2 - m], &ka1);
1323 for (j = *n - 1; j >= i__2; --j) {
1324 rwork[j - m] = rwork[j - *ka - m];
1327 work[i__3].r = work[i__4].r, work[i__3].i = work[i__4].i;
1334 /* Transform A, working with the lower triangle */
1338 /* Form inv(S(i))**H * A * inv(S(i)) */
1340 i__2 = i__ * bb_dim1 + 1;
1342 i__2 = i__ * ab_dim1 + 1;
1343 i__3 = i__ * ab_dim1 + 1;
1344 r__1 = ab[i__3].r / bii / bii;
1345 ab[i__2].r = r__1, ab[i__2].i = 0.f;
1347 for (j = i__ + 1; j <= i__2; ++j) {
1348 i__3 = j - i__ + 1 + i__ * ab_dim1;
1349 i__4 = j - i__ + 1 + i__ * ab_dim1;
1350 q__1.r = ab[i__4].r / bii, q__1.i = ab[i__4].i / bii;
1351 ab[i__3].r = q__1.r, ab[i__3].i = q__1.i;
1355 i__2 = 1, i__3 = i__ - *ka;
1357 for (j = f2cmax(i__2,i__3); j <= i__4; ++j) {
1358 i__2 = i__ - j + 1 + j * ab_dim1;
1359 i__3 = i__ - j + 1 + j * ab_dim1;
1360 q__1.r = ab[i__3].r / bii, q__1.i = ab[i__3].i / bii;
1361 ab[i__2].r = q__1.r, ab[i__2].i = q__1.i;
1365 for (k = i__ - kbt; k <= i__4; ++k) {
1367 for (j = i__ - kbt; j <= i__2; ++j) {
1368 i__3 = k - j + 1 + j * ab_dim1;
1369 i__1 = k - j + 1 + j * ab_dim1;
1370 i__5 = i__ - j + 1 + j * bb_dim1;
1371 r_cnjg(&q__5, &ab[i__ - k + 1 + k * ab_dim1]);
1372 q__4.r = bb[i__5].r * q__5.r - bb[i__5].i * q__5.i,
1373 q__4.i = bb[i__5].r * q__5.i + bb[i__5].i *
1375 q__3.r = ab[i__1].r - q__4.r, q__3.i = ab[i__1].i -
1377 r_cnjg(&q__7, &bb[i__ - k + 1 + k * bb_dim1]);
1378 i__6 = i__ - j + 1 + j * ab_dim1;
1379 q__6.r = q__7.r * ab[i__6].r - q__7.i * ab[i__6].i,
1380 q__6.i = q__7.r * ab[i__6].i + q__7.i * ab[i__6]
1382 q__2.r = q__3.r - q__6.r, q__2.i = q__3.i - q__6.i;
1383 i__7 = i__ * ab_dim1 + 1;
1385 i__8 = i__ - j + 1 + j * bb_dim1;
1386 q__9.r = r__1 * bb[i__8].r, q__9.i = r__1 * bb[i__8].i;
1387 r_cnjg(&q__10, &bb[i__ - k + 1 + k * bb_dim1]);
1388 q__8.r = q__9.r * q__10.r - q__9.i * q__10.i, q__8.i =
1389 q__9.r * q__10.i + q__9.i * q__10.r;
1390 q__1.r = q__2.r + q__8.r, q__1.i = q__2.i + q__8.i;
1391 ab[i__3].r = q__1.r, ab[i__3].i = q__1.i;
1395 i__2 = 1, i__3 = i__ - *ka;
1396 i__1 = i__ - kbt - 1;
1397 for (j = f2cmax(i__2,i__3); j <= i__1; ++j) {
1398 i__2 = k - j + 1 + j * ab_dim1;
1399 i__3 = k - j + 1 + j * ab_dim1;
1400 r_cnjg(&q__3, &bb[i__ - k + 1 + k * bb_dim1]);
1401 i__5 = i__ - j + 1 + j * ab_dim1;
1402 q__2.r = q__3.r * ab[i__5].r - q__3.i * ab[i__5].i,
1403 q__2.i = q__3.r * ab[i__5].i + q__3.i * ab[i__5]
1405 q__1.r = ab[i__3].r - q__2.r, q__1.i = ab[i__3].i -
1407 ab[i__2].r = q__1.r, ab[i__2].i = q__1.i;
1413 for (j = i__; j <= i__4; ++j) {
1415 i__1 = j - *ka, i__2 = i__ - kbt;
1417 for (k = f2cmax(i__1,i__2); k <= i__3; ++k) {
1418 i__1 = j - k + 1 + k * ab_dim1;
1419 i__2 = j - k + 1 + k * ab_dim1;
1420 i__5 = i__ - k + 1 + k * bb_dim1;
1421 i__6 = j - i__ + 1 + i__ * ab_dim1;
1422 q__2.r = bb[i__5].r * ab[i__6].r - bb[i__5].i * ab[i__6]
1423 .i, q__2.i = bb[i__5].r * ab[i__6].i + bb[i__5].i
1425 q__1.r = ab[i__2].r - q__2.r, q__1.i = ab[i__2].i -
1427 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
1435 /* post-multiply X by inv(S(i)) */
1439 csscal_(&i__4, &r__1, &x[m + 1 + i__ * x_dim1], &c__1);
1442 q__1.r = -1.f, q__1.i = 0.f;
1444 cgeru_(&i__4, &kbt, &q__1, &x[m + 1 + i__ * x_dim1], &
1445 c__1, &bb[kbt + 1 + (i__ - kbt) * bb_dim1], &i__3,
1446 &x[m + 1 + (i__ - kbt) * x_dim1], ldx);
1450 /* store a(i1,i) in RA1 for use in next loop over K */
1452 i__4 = i1 - i__ + 1 + i__ * ab_dim1;
1453 ra1.r = ab[i__4].r, ra1.i = ab[i__4].i;
1456 /* Generate and apply vectors of rotations to chase all the */
1457 /* existing bulges KA positions down toward the bottom of the */
1461 for (k = 1; k <= i__4; ++k) {
1464 /* Determine the rotations which would annihilate the bulge */
1465 /* which has in theory just been created */
1467 if (i__ - k + *ka < *n && i__ - k > 1) {
1469 /* generate rotation to annihilate a(i-k+ka+1,i) */
1471 clartg_(&ab[ka1 - k + i__ * ab_dim1], &ra1, &rwork[i__ -
1472 k + *ka - m], &work[i__ - k + *ka - m], &ra);
1474 /* create nonzero element a(i-k+ka+1,i-k) outside the */
1475 /* band and store it in WORK(i-k) */
1477 i__3 = k + 1 + (i__ - k) * bb_dim1;
1478 q__2.r = -bb[i__3].r, q__2.i = -bb[i__3].i;
1479 q__1.r = q__2.r * ra1.r - q__2.i * ra1.i, q__1.i = q__2.r
1480 * ra1.i + q__2.i * ra1.r;
1481 t.r = q__1.r, t.i = q__1.i;
1483 i__1 = i__ - k + *ka - m;
1484 q__2.r = rwork[i__1] * t.r, q__2.i = rwork[i__1] * t.i;
1485 r_cnjg(&q__4, &work[i__ - k + *ka - m]);
1486 i__2 = ka1 + (i__ - k) * ab_dim1;
1487 q__3.r = q__4.r * ab[i__2].r - q__4.i * ab[i__2].i,
1488 q__3.i = q__4.r * ab[i__2].i + q__4.i * ab[i__2]
1490 q__1.r = q__2.r - q__3.r, q__1.i = q__2.i - q__3.i;
1491 work[i__3].r = q__1.r, work[i__3].i = q__1.i;
1492 i__3 = ka1 + (i__ - k) * ab_dim1;
1493 i__1 = i__ - k + *ka - m;
1494 q__2.r = work[i__1].r * t.r - work[i__1].i * t.i, q__2.i =
1495 work[i__1].r * t.i + work[i__1].i * t.r;
1496 i__2 = i__ - k + *ka - m;
1497 i__5 = ka1 + (i__ - k) * ab_dim1;
1498 q__3.r = rwork[i__2] * ab[i__5].r, q__3.i = rwork[i__2] *
1500 q__1.r = q__2.r + q__3.r, q__1.i = q__2.i + q__3.i;
1501 ab[i__3].r = q__1.r, ab[i__3].i = q__1.i;
1502 ra1.r = ra.r, ra1.i = ra.i;
1506 i__3 = 1, i__1 = k - i0 + 2;
1507 j2 = i__ - k - 1 + f2cmax(i__3,i__1) * ka1;
1508 nr = (*n - j2 + *ka) / ka1;
1509 j1 = j2 + (nr - 1) * ka1;
1512 i__3 = j2, i__1 = i__ + (*ka << 1) - k + 1;
1513 j2t = f2cmax(i__3,i__1);
1517 nrt = (*n - j2t + *ka) / ka1;
1520 for (j = j2t; i__1 < 0 ? j >= i__3 : j <= i__3; j += i__1) {
1522 /* create nonzero element a(j+1,j-ka) outside the band */
1523 /* and store it in WORK(j-m) */
1527 i__6 = ka1 + (j - *ka + 1) * ab_dim1;
1528 q__1.r = work[i__5].r * ab[i__6].r - work[i__5].i * ab[i__6]
1529 .i, q__1.i = work[i__5].r * ab[i__6].i + work[i__5].i
1531 work[i__2].r = q__1.r, work[i__2].i = q__1.i;
1532 i__2 = ka1 + (j - *ka + 1) * ab_dim1;
1534 i__6 = ka1 + (j - *ka + 1) * ab_dim1;
1535 q__1.r = rwork[i__5] * ab[i__6].r, q__1.i = rwork[i__5] * ab[
1537 ab[i__2].r = q__1.r, ab[i__2].i = q__1.i;
1541 /* generate rotations in 1st set to annihilate elements which */
1542 /* have been created outside the band */
1545 clargv_(&nrt, &ab[ka1 + (j2t - *ka) * ab_dim1], &inca, &work[
1546 j2t - m], &ka1, &rwork[j2t - m], &ka1);
1550 /* apply rotations in 1st set from the left */
1553 for (l = 1; l <= i__1; ++l) {
1554 clartv_(&nr, &ab[l + 1 + (j2 - l) * ab_dim1], &inca, &ab[
1555 l + 2 + (j2 - l) * ab_dim1], &inca, &rwork[j2 - m]
1556 , &work[j2 - m], &ka1);
1560 /* apply rotations in 1st set from both sides to diagonal */
1563 clar2v_(&nr, &ab[j2 * ab_dim1 + 1], &ab[(j2 + 1) * ab_dim1 +
1564 1], &ab[j2 * ab_dim1 + 2], &inca, &rwork[j2 - m], &
1565 work[j2 - m], &ka1);
1567 clacgv_(&nr, &work[j2 - m], &ka1);
1570 /* start applying rotations in 1st set from the right */
1573 for (l = *ka - 1; l >= i__1; --l) {
1574 nrt = (*n - j2 + l) / ka1;
1576 clartv_(&nrt, &ab[ka1 - l + 1 + j2 * ab_dim1], &inca, &ab[
1577 ka1 - l + (j2 + 1) * ab_dim1], &inca, &rwork[j2 -
1578 m], &work[j2 - m], &ka1);
1585 /* post-multiply X by product of rotations in 1st set */
1589 for (j = j2; i__3 < 0 ? j >= i__1 : j <= i__1; j += i__3) {
1591 crot_(&i__2, &x[m + 1 + j * x_dim1], &c__1, &x[m + 1 + (j
1592 + 1) * x_dim1], &c__1, &rwork[j - m], &work[j - m]
1601 if (i2 <= *n && kbt > 0) {
1603 /* create nonzero element a(i-kbt+ka+1,i-kbt) outside the */
1604 /* band and store it in WORK(i-kbt) */
1607 i__3 = kbt + 1 + (i__ - kbt) * bb_dim1;
1608 q__2.r = -bb[i__3].r, q__2.i = -bb[i__3].i;
1609 q__1.r = q__2.r * ra1.r - q__2.i * ra1.i, q__1.i = q__2.r *
1610 ra1.i + q__2.i * ra1.r;
1611 work[i__4].r = q__1.r, work[i__4].i = q__1.i;
1615 for (k = *kb; k >= 1; --k) {
1618 i__4 = 2, i__3 = k - i0 + 1;
1619 j2 = i__ - k - 1 + f2cmax(i__4,i__3) * ka1;
1622 i__4 = 1, i__3 = k - i0 + 1;
1623 j2 = i__ - k - 1 + f2cmax(i__4,i__3) * ka1;
1626 /* finish applying rotations in 2nd set from the right */
1628 for (l = *kb - k; l >= 1; --l) {
1629 nrt = (*n - j2 + *ka + l) / ka1;
1631 clartv_(&nrt, &ab[ka1 - l + 1 + (j2 - *ka) * ab_dim1], &
1632 inca, &ab[ka1 - l + (j2 - *ka + 1) * ab_dim1], &
1633 inca, &rwork[j2 - *ka], &work[j2 - *ka], &ka1);
1637 nr = (*n - j2 + *ka) / ka1;
1638 j1 = j2 + (nr - 1) * ka1;
1641 for (j = j1; i__3 < 0 ? j >= i__4 : j <= i__4; j += i__3) {
1644 work[i__1].r = work[i__2].r, work[i__1].i = work[i__2].i;
1645 rwork[j] = rwork[j - *ka];
1650 for (j = j2; i__4 < 0 ? j >= i__3 : j <= i__3; j += i__4) {
1652 /* create nonzero element a(j+1,j-ka) outside the band */
1653 /* and store it in WORK(j) */
1657 i__5 = ka1 + (j - *ka + 1) * ab_dim1;
1658 q__1.r = work[i__2].r * ab[i__5].r - work[i__2].i * ab[i__5]
1659 .i, q__1.i = work[i__2].r * ab[i__5].i + work[i__2].i
1661 work[i__1].r = q__1.r, work[i__1].i = q__1.i;
1662 i__1 = ka1 + (j - *ka + 1) * ab_dim1;
1664 i__5 = ka1 + (j - *ka + 1) * ab_dim1;
1665 q__1.r = rwork[i__2] * ab[i__5].r, q__1.i = rwork[i__2] * ab[
1667 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
1671 if (i__ - k < *n - *ka && k <= kbt) {
1672 i__4 = i__ - k + *ka;
1674 work[i__4].r = work[i__3].r, work[i__4].i = work[i__3].i;
1680 for (k = *kb; k >= 1; --k) {
1682 i__4 = 1, i__3 = k - i0 + 1;
1683 j2 = i__ - k - 1 + f2cmax(i__4,i__3) * ka1;
1684 nr = (*n - j2 + *ka) / ka1;
1685 j1 = j2 + (nr - 1) * ka1;
1688 /* generate rotations in 2nd set to annihilate elements */
1689 /* which have been created outside the band */
1691 clargv_(&nr, &ab[ka1 + (j2 - *ka) * ab_dim1], &inca, &work[j2]
1692 , &ka1, &rwork[j2], &ka1);
1694 /* apply rotations in 2nd set from the left */
1697 for (l = 1; l <= i__4; ++l) {
1698 clartv_(&nr, &ab[l + 1 + (j2 - l) * ab_dim1], &inca, &ab[
1699 l + 2 + (j2 - l) * ab_dim1], &inca, &rwork[j2], &
1704 /* apply rotations in 2nd set from both sides to diagonal */
1707 clar2v_(&nr, &ab[j2 * ab_dim1 + 1], &ab[(j2 + 1) * ab_dim1 +
1708 1], &ab[j2 * ab_dim1 + 2], &inca, &rwork[j2], &work[
1711 clacgv_(&nr, &work[j2], &ka1);
1714 /* start applying rotations in 2nd set from the right */
1717 for (l = *ka - 1; l >= i__4; --l) {
1718 nrt = (*n - j2 + l) / ka1;
1720 clartv_(&nrt, &ab[ka1 - l + 1 + j2 * ab_dim1], &inca, &ab[
1721 ka1 - l + (j2 + 1) * ab_dim1], &inca, &rwork[j2],
1729 /* post-multiply X by product of rotations in 2nd set */
1733 for (j = j2; i__3 < 0 ? j >= i__4 : j <= i__4; j += i__3) {
1735 crot_(&i__1, &x[m + 1 + j * x_dim1], &c__1, &x[m + 1 + (j
1736 + 1) * x_dim1], &c__1, &rwork[j], &work[j]);
1744 for (k = 1; k <= i__3; ++k) {
1746 i__4 = 1, i__1 = k - i0 + 2;
1747 j2 = i__ - k - 1 + f2cmax(i__4,i__1) * ka1;
1749 /* finish applying rotations in 1st set from the right */
1751 for (l = *kb - k; l >= 1; --l) {
1752 nrt = (*n - j2 + l) / ka1;
1754 clartv_(&nrt, &ab[ka1 - l + 1 + j2 * ab_dim1], &inca, &ab[
1755 ka1 - l + (j2 + 1) * ab_dim1], &inca, &rwork[j2 -
1756 m], &work[j2 - m], &ka1);
1765 for (j = *n - 1; j >= i__3; --j) {
1766 rwork[j - m] = rwork[j - *ka - m];
1769 work[i__4].r = work[i__1].r, work[i__4].i = work[i__1].i;
1780 /* **************************** Phase 2 ***************************** */
1782 /* The logical structure of this phase is: */
1784 /* UPDATE = .TRUE. */
1786 /* use S(i) to update A and create a new bulge */
1787 /* apply rotations to push all bulges KA positions upward */
1789 /* UPDATE = .FALSE. */
1790 /* DO I = M - KA - 1, 2, -1 */
1791 /* apply rotations to push all bulges KA positions upward */
1794 /* To avoid duplicating code, the two loops are merged. */
1802 i__3 = *kb, i__4 = m - i__;
1803 kbt = f2cmin(i__3,i__4);
1806 i__3 = 1, i__4 = i__ - *ka;
1807 i1 = f2cmax(i__3,i__4);
1808 i2 = i__ + kbt - ka1;
1825 if (i__ < m - kbt) {
1833 /* Transform A, working with the upper triangle */
1837 /* Form inv(S(i))**H * A * inv(S(i)) */
1839 i__3 = kb1 + i__ * bb_dim1;
1841 i__3 = ka1 + i__ * ab_dim1;
1842 i__4 = ka1 + i__ * ab_dim1;
1843 r__1 = ab[i__4].r / bii / bii;
1844 ab[i__3].r = r__1, ab[i__3].i = 0.f;
1846 for (j = i1; j <= i__3; ++j) {
1847 i__4 = j - i__ + ka1 + i__ * ab_dim1;
1848 i__1 = j - i__ + ka1 + i__ * ab_dim1;
1849 q__1.r = ab[i__1].r / bii, q__1.i = ab[i__1].i / bii;
1850 ab[i__4].r = q__1.r, ab[i__4].i = q__1.i;
1854 i__4 = *n, i__1 = i__ + *ka;
1855 i__3 = f2cmin(i__4,i__1);
1856 for (j = i__ + 1; j <= i__3; ++j) {
1857 i__4 = i__ - j + ka1 + j * ab_dim1;
1858 i__1 = i__ - j + ka1 + j * ab_dim1;
1859 q__1.r = ab[i__1].r / bii, q__1.i = ab[i__1].i / bii;
1860 ab[i__4].r = q__1.r, ab[i__4].i = q__1.i;
1864 for (k = i__ + 1; k <= i__3; ++k) {
1866 for (j = k; j <= i__4; ++j) {
1867 i__1 = k - j + ka1 + j * ab_dim1;
1868 i__2 = k - j + ka1 + j * ab_dim1;
1869 i__5 = i__ - j + kb1 + j * bb_dim1;
1870 r_cnjg(&q__5, &ab[i__ - k + ka1 + k * ab_dim1]);
1871 q__4.r = bb[i__5].r * q__5.r - bb[i__5].i * q__5.i,
1872 q__4.i = bb[i__5].r * q__5.i + bb[i__5].i *
1874 q__3.r = ab[i__2].r - q__4.r, q__3.i = ab[i__2].i -
1876 r_cnjg(&q__7, &bb[i__ - k + kb1 + k * bb_dim1]);
1877 i__6 = i__ - j + ka1 + j * ab_dim1;
1878 q__6.r = q__7.r * ab[i__6].r - q__7.i * ab[i__6].i,
1879 q__6.i = q__7.r * ab[i__6].i + q__7.i * ab[i__6]
1881 q__2.r = q__3.r - q__6.r, q__2.i = q__3.i - q__6.i;
1882 i__7 = ka1 + i__ * ab_dim1;
1884 i__8 = i__ - j + kb1 + j * bb_dim1;
1885 q__9.r = r__1 * bb[i__8].r, q__9.i = r__1 * bb[i__8].i;
1886 r_cnjg(&q__10, &bb[i__ - k + kb1 + k * bb_dim1]);
1887 q__8.r = q__9.r * q__10.r - q__9.i * q__10.i, q__8.i =
1888 q__9.r * q__10.i + q__9.i * q__10.r;
1889 q__1.r = q__2.r + q__8.r, q__1.i = q__2.i + q__8.i;
1890 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
1894 i__1 = *n, i__2 = i__ + *ka;
1895 i__4 = f2cmin(i__1,i__2);
1896 for (j = i__ + kbt + 1; j <= i__4; ++j) {
1897 i__1 = k - j + ka1 + j * ab_dim1;
1898 i__2 = k - j + ka1 + j * ab_dim1;
1899 r_cnjg(&q__3, &bb[i__ - k + kb1 + k * bb_dim1]);
1900 i__5 = i__ - j + ka1 + j * ab_dim1;
1901 q__2.r = q__3.r * ab[i__5].r - q__3.i * ab[i__5].i,
1902 q__2.i = q__3.r * ab[i__5].i + q__3.i * ab[i__5]
1904 q__1.r = ab[i__2].r - q__2.r, q__1.i = ab[i__2].i -
1906 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
1912 for (j = i1; j <= i__3; ++j) {
1914 i__1 = j + *ka, i__2 = i__ + kbt;
1915 i__4 = f2cmin(i__1,i__2);
1916 for (k = i__ + 1; k <= i__4; ++k) {
1917 i__1 = j - k + ka1 + k * ab_dim1;
1918 i__2 = j - k + ka1 + k * ab_dim1;
1919 i__5 = i__ - k + kb1 + k * bb_dim1;
1920 i__6 = j - i__ + ka1 + i__ * ab_dim1;
1921 q__2.r = bb[i__5].r * ab[i__6].r - bb[i__5].i * ab[i__6]
1922 .i, q__2.i = bb[i__5].r * ab[i__6].i + bb[i__5].i
1924 q__1.r = ab[i__2].r - q__2.r, q__1.i = ab[i__2].i -
1926 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
1934 /* post-multiply X by inv(S(i)) */
1937 csscal_(&nx, &r__1, &x[i__ * x_dim1 + 1], &c__1);
1939 q__1.r = -1.f, q__1.i = 0.f;
1941 cgeru_(&nx, &kbt, &q__1, &x[i__ * x_dim1 + 1], &c__1, &bb[
1942 *kb + (i__ + 1) * bb_dim1], &i__3, &x[(i__ + 1) *
1947 /* store a(i1,i) in RA1 for use in next loop over K */
1949 i__3 = i1 - i__ + ka1 + i__ * ab_dim1;
1950 ra1.r = ab[i__3].r, ra1.i = ab[i__3].i;
1953 /* Generate and apply vectors of rotations to chase all the */
1954 /* existing bulges KA positions up toward the top of the band */
1957 for (k = 1; k <= i__3; ++k) {
1960 /* Determine the rotations which would annihilate the bulge */
1961 /* which has in theory just been created */
1963 if (i__ + k - ka1 > 0 && i__ + k < m) {
1965 /* generate rotation to annihilate a(i+k-ka-1,i) */
1967 clartg_(&ab[k + 1 + i__ * ab_dim1], &ra1, &rwork[i__ + k
1968 - *ka], &work[i__ + k - *ka], &ra);
1970 /* create nonzero element a(i+k-ka-1,i+k) outside the */
1971 /* band and store it in WORK(m-kb+i+k) */
1973 i__4 = kb1 - k + (i__ + k) * bb_dim1;
1974 q__2.r = -bb[i__4].r, q__2.i = -bb[i__4].i;
1975 q__1.r = q__2.r * ra1.r - q__2.i * ra1.i, q__1.i = q__2.r
1976 * ra1.i + q__2.i * ra1.r;
1977 t.r = q__1.r, t.i = q__1.i;
1978 i__4 = m - *kb + i__ + k;
1979 i__1 = i__ + k - *ka;
1980 q__2.r = rwork[i__1] * t.r, q__2.i = rwork[i__1] * t.i;
1981 r_cnjg(&q__4, &work[i__ + k - *ka]);
1982 i__2 = (i__ + k) * ab_dim1 + 1;
1983 q__3.r = q__4.r * ab[i__2].r - q__4.i * ab[i__2].i,
1984 q__3.i = q__4.r * ab[i__2].i + q__4.i * ab[i__2]
1986 q__1.r = q__2.r - q__3.r, q__1.i = q__2.i - q__3.i;
1987 work[i__4].r = q__1.r, work[i__4].i = q__1.i;
1988 i__4 = (i__ + k) * ab_dim1 + 1;
1989 i__1 = i__ + k - *ka;
1990 q__2.r = work[i__1].r * t.r - work[i__1].i * t.i, q__2.i =
1991 work[i__1].r * t.i + work[i__1].i * t.r;
1992 i__2 = i__ + k - *ka;
1993 i__5 = (i__ + k) * ab_dim1 + 1;
1994 q__3.r = rwork[i__2] * ab[i__5].r, q__3.i = rwork[i__2] *
1996 q__1.r = q__2.r + q__3.r, q__1.i = q__2.i + q__3.i;
1997 ab[i__4].r = q__1.r, ab[i__4].i = q__1.i;
1998 ra1.r = ra.r, ra1.i = ra.i;
2002 i__4 = 1, i__1 = k + i0 - m + 1;
2003 j2 = i__ + k + 1 - f2cmax(i__4,i__1) * ka1;
2004 nr = (j2 + *ka - 1) / ka1;
2005 j1 = j2 - (nr - 1) * ka1;
2008 i__4 = j2, i__1 = i__ - (*ka << 1) + k - 1;
2009 j2t = f2cmin(i__4,i__1);
2013 nrt = (j2t + *ka - 1) / ka1;
2016 for (j = j1; i__1 < 0 ? j >= i__4 : j <= i__4; j += i__1) {
2018 /* create nonzero element a(j-1,j+ka) outside the band */
2019 /* and store it in WORK(j) */
2023 i__6 = (j + *ka - 1) * ab_dim1 + 1;
2024 q__1.r = work[i__5].r * ab[i__6].r - work[i__5].i * ab[i__6]
2025 .i, q__1.i = work[i__5].r * ab[i__6].i + work[i__5].i
2027 work[i__2].r = q__1.r, work[i__2].i = q__1.i;
2028 i__2 = (j + *ka - 1) * ab_dim1 + 1;
2030 i__6 = (j + *ka - 1) * ab_dim1 + 1;
2031 q__1.r = rwork[i__5] * ab[i__6].r, q__1.i = rwork[i__5] * ab[
2033 ab[i__2].r = q__1.r, ab[i__2].i = q__1.i;
2037 /* generate rotations in 1st set to annihilate elements which */
2038 /* have been created outside the band */
2041 clargv_(&nrt, &ab[(j1 + *ka) * ab_dim1 + 1], &inca, &work[j1],
2042 &ka1, &rwork[j1], &ka1);
2046 /* apply rotations in 1st set from the left */
2049 for (l = 1; l <= i__1; ++l) {
2050 clartv_(&nr, &ab[ka1 - l + (j1 + l) * ab_dim1], &inca, &
2051 ab[*ka - l + (j1 + l) * ab_dim1], &inca, &rwork[
2052 j1], &work[j1], &ka1);
2056 /* apply rotations in 1st set from both sides to diagonal */
2059 clar2v_(&nr, &ab[ka1 + j1 * ab_dim1], &ab[ka1 + (j1 - 1) *
2060 ab_dim1], &ab[*ka + j1 * ab_dim1], &inca, &rwork[j1],
2063 clacgv_(&nr, &work[j1], &ka1);
2066 /* start applying rotations in 1st set from the right */
2069 for (l = *ka - 1; l >= i__1; --l) {
2070 nrt = (j2 + l - 1) / ka1;
2071 j1t = j2 - (nrt - 1) * ka1;
2073 clartv_(&nrt, &ab[l + j1t * ab_dim1], &inca, &ab[l + 1 + (
2074 j1t - 1) * ab_dim1], &inca, &rwork[j1t], &work[
2082 /* post-multiply X by product of rotations in 1st set */
2086 for (j = j1; i__4 < 0 ? j >= i__1 : j <= i__1; j += i__4) {
2087 crot_(&nx, &x[j * x_dim1 + 1], &c__1, &x[(j - 1) * x_dim1
2088 + 1], &c__1, &rwork[j], &work[j]);
2096 if (i2 > 0 && kbt > 0) {
2098 /* create nonzero element a(i+kbt-ka-1,i+kbt) outside the */
2099 /* band and store it in WORK(m-kb+i+kbt) */
2101 i__3 = m - *kb + i__ + kbt;
2102 i__4 = kb1 - kbt + (i__ + kbt) * bb_dim1;
2103 q__2.r = -bb[i__4].r, q__2.i = -bb[i__4].i;
2104 q__1.r = q__2.r * ra1.r - q__2.i * ra1.i, q__1.i = q__2.r *
2105 ra1.i + q__2.i * ra1.r;
2106 work[i__3].r = q__1.r, work[i__3].i = q__1.i;
2110 for (k = *kb; k >= 1; --k) {
2113 i__3 = 2, i__4 = k + i0 - m;
2114 j2 = i__ + k + 1 - f2cmax(i__3,i__4) * ka1;
2117 i__3 = 1, i__4 = k + i0 - m;
2118 j2 = i__ + k + 1 - f2cmax(i__3,i__4) * ka1;
2121 /* finish applying rotations in 2nd set from the right */
2123 for (l = *kb - k; l >= 1; --l) {
2124 nrt = (j2 + *ka + l - 1) / ka1;
2125 j1t = j2 - (nrt - 1) * ka1;
2127 clartv_(&nrt, &ab[l + (j1t + *ka) * ab_dim1], &inca, &ab[
2128 l + 1 + (j1t + *ka - 1) * ab_dim1], &inca, &rwork[
2129 m - *kb + j1t + *ka], &work[m - *kb + j1t + *ka],
2134 nr = (j2 + *ka - 1) / ka1;
2135 j1 = j2 - (nr - 1) * ka1;
2138 for (j = j1; i__4 < 0 ? j >= i__3 : j <= i__3; j += i__4) {
2140 i__2 = m - *kb + j + *ka;
2141 work[i__1].r = work[i__2].r, work[i__1].i = work[i__2].i;
2142 rwork[m - *kb + j] = rwork[m - *kb + j + *ka];
2147 for (j = j1; i__3 < 0 ? j >= i__4 : j <= i__4; j += i__3) {
2149 /* create nonzero element a(j-1,j+ka) outside the band */
2150 /* and store it in WORK(m-kb+j) */
2154 i__5 = (j + *ka - 1) * ab_dim1 + 1;
2155 q__1.r = work[i__2].r * ab[i__5].r - work[i__2].i * ab[i__5]
2156 .i, q__1.i = work[i__2].r * ab[i__5].i + work[i__2].i
2158 work[i__1].r = q__1.r, work[i__1].i = q__1.i;
2159 i__1 = (j + *ka - 1) * ab_dim1 + 1;
2161 i__5 = (j + *ka - 1) * ab_dim1 + 1;
2162 q__1.r = rwork[i__2] * ab[i__5].r, q__1.i = rwork[i__2] * ab[
2164 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
2168 if (i__ + k > ka1 && k <= kbt) {
2169 i__3 = m - *kb + i__ + k - *ka;
2170 i__4 = m - *kb + i__ + k;
2171 work[i__3].r = work[i__4].r, work[i__3].i = work[i__4].i;
2177 for (k = *kb; k >= 1; --k) {
2179 i__3 = 1, i__4 = k + i0 - m;
2180 j2 = i__ + k + 1 - f2cmax(i__3,i__4) * ka1;
2181 nr = (j2 + *ka - 1) / ka1;
2182 j1 = j2 - (nr - 1) * ka1;
2185 /* generate rotations in 2nd set to annihilate elements */
2186 /* which have been created outside the band */
2188 clargv_(&nr, &ab[(j1 + *ka) * ab_dim1 + 1], &inca, &work[m - *
2189 kb + j1], &ka1, &rwork[m - *kb + j1], &ka1);
2191 /* apply rotations in 2nd set from the left */
2194 for (l = 1; l <= i__3; ++l) {
2195 clartv_(&nr, &ab[ka1 - l + (j1 + l) * ab_dim1], &inca, &
2196 ab[*ka - l + (j1 + l) * ab_dim1], &inca, &rwork[m
2197 - *kb + j1], &work[m - *kb + j1], &ka1);
2201 /* apply rotations in 2nd set from both sides to diagonal */
2204 clar2v_(&nr, &ab[ka1 + j1 * ab_dim1], &ab[ka1 + (j1 - 1) *
2205 ab_dim1], &ab[*ka + j1 * ab_dim1], &inca, &rwork[m - *
2206 kb + j1], &work[m - *kb + j1], &ka1);
2208 clacgv_(&nr, &work[m - *kb + j1], &ka1);
2211 /* start applying rotations in 2nd set from the right */
2214 for (l = *ka - 1; l >= i__3; --l) {
2215 nrt = (j2 + l - 1) / ka1;
2216 j1t = j2 - (nrt - 1) * ka1;
2218 clartv_(&nrt, &ab[l + j1t * ab_dim1], &inca, &ab[l + 1 + (
2219 j1t - 1) * ab_dim1], &inca, &rwork[m - *kb + j1t],
2220 &work[m - *kb + j1t], &ka1);
2227 /* post-multiply X by product of rotations in 2nd set */
2231 for (j = j1; i__4 < 0 ? j >= i__3 : j <= i__3; j += i__4) {
2232 crot_(&nx, &x[j * x_dim1 + 1], &c__1, &x[(j - 1) * x_dim1
2233 + 1], &c__1, &rwork[m - *kb + j], &work[m - *kb +
2242 for (k = 1; k <= i__4; ++k) {
2244 i__3 = 1, i__1 = k + i0 - m + 1;
2245 j2 = i__ + k + 1 - f2cmax(i__3,i__1) * ka1;
2247 /* finish applying rotations in 1st set from the right */
2249 for (l = *kb - k; l >= 1; --l) {
2250 nrt = (j2 + l - 1) / ka1;
2251 j1t = j2 - (nrt - 1) * ka1;
2253 clartv_(&nrt, &ab[l + j1t * ab_dim1], &inca, &ab[l + 1 + (
2254 j1t - 1) * ab_dim1], &inca, &rwork[j1t], &work[
2264 for (j = 2; j <= i__4; ++j) {
2265 rwork[j] = rwork[j + *ka];
2268 work[i__3].r = work[i__1].r, work[i__3].i = work[i__1].i;
2275 /* Transform A, working with the lower triangle */
2279 /* Form inv(S(i))**H * A * inv(S(i)) */
2281 i__4 = i__ * bb_dim1 + 1;
2283 i__4 = i__ * ab_dim1 + 1;
2284 i__3 = i__ * ab_dim1 + 1;
2285 r__1 = ab[i__3].r / bii / bii;
2286 ab[i__4].r = r__1, ab[i__4].i = 0.f;
2288 for (j = i1; j <= i__4; ++j) {
2289 i__3 = i__ - j + 1 + j * ab_dim1;
2290 i__1 = i__ - j + 1 + j * ab_dim1;
2291 q__1.r = ab[i__1].r / bii, q__1.i = ab[i__1].i / bii;
2292 ab[i__3].r = q__1.r, ab[i__3].i = q__1.i;
2296 i__3 = *n, i__1 = i__ + *ka;
2297 i__4 = f2cmin(i__3,i__1);
2298 for (j = i__ + 1; j <= i__4; ++j) {
2299 i__3 = j - i__ + 1 + i__ * ab_dim1;
2300 i__1 = j - i__ + 1 + i__ * ab_dim1;
2301 q__1.r = ab[i__1].r / bii, q__1.i = ab[i__1].i / bii;
2302 ab[i__3].r = q__1.r, ab[i__3].i = q__1.i;
2306 for (k = i__ + 1; k <= i__4; ++k) {
2308 for (j = k; j <= i__3; ++j) {
2309 i__1 = j - k + 1 + k * ab_dim1;
2310 i__2 = j - k + 1 + k * ab_dim1;
2311 i__5 = j - i__ + 1 + i__ * bb_dim1;
2312 r_cnjg(&q__5, &ab[k - i__ + 1 + i__ * ab_dim1]);
2313 q__4.r = bb[i__5].r * q__5.r - bb[i__5].i * q__5.i,
2314 q__4.i = bb[i__5].r * q__5.i + bb[i__5].i *
2316 q__3.r = ab[i__2].r - q__4.r, q__3.i = ab[i__2].i -
2318 r_cnjg(&q__7, &bb[k - i__ + 1 + i__ * bb_dim1]);
2319 i__6 = j - i__ + 1 + i__ * ab_dim1;
2320 q__6.r = q__7.r * ab[i__6].r - q__7.i * ab[i__6].i,
2321 q__6.i = q__7.r * ab[i__6].i + q__7.i * ab[i__6]
2323 q__2.r = q__3.r - q__6.r, q__2.i = q__3.i - q__6.i;
2324 i__7 = i__ * ab_dim1 + 1;
2326 i__8 = j - i__ + 1 + i__ * bb_dim1;
2327 q__9.r = r__1 * bb[i__8].r, q__9.i = r__1 * bb[i__8].i;
2328 r_cnjg(&q__10, &bb[k - i__ + 1 + i__ * bb_dim1]);
2329 q__8.r = q__9.r * q__10.r - q__9.i * q__10.i, q__8.i =
2330 q__9.r * q__10.i + q__9.i * q__10.r;
2331 q__1.r = q__2.r + q__8.r, q__1.i = q__2.i + q__8.i;
2332 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
2336 i__1 = *n, i__2 = i__ + *ka;
2337 i__3 = f2cmin(i__1,i__2);
2338 for (j = i__ + kbt + 1; j <= i__3; ++j) {
2339 i__1 = j - k + 1 + k * ab_dim1;
2340 i__2 = j - k + 1 + k * ab_dim1;
2341 r_cnjg(&q__3, &bb[k - i__ + 1 + i__ * bb_dim1]);
2342 i__5 = j - i__ + 1 + i__ * ab_dim1;
2343 q__2.r = q__3.r * ab[i__5].r - q__3.i * ab[i__5].i,
2344 q__2.i = q__3.r * ab[i__5].i + q__3.i * ab[i__5]
2346 q__1.r = ab[i__2].r - q__2.r, q__1.i = ab[i__2].i -
2348 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
2354 for (j = i1; j <= i__4; ++j) {
2356 i__1 = j + *ka, i__2 = i__ + kbt;
2357 i__3 = f2cmin(i__1,i__2);
2358 for (k = i__ + 1; k <= i__3; ++k) {
2359 i__1 = k - j + 1 + j * ab_dim1;
2360 i__2 = k - j + 1 + j * ab_dim1;
2361 i__5 = k - i__ + 1 + i__ * bb_dim1;
2362 i__6 = i__ - j + 1 + j * ab_dim1;
2363 q__2.r = bb[i__5].r * ab[i__6].r - bb[i__5].i * ab[i__6]
2364 .i, q__2.i = bb[i__5].r * ab[i__6].i + bb[i__5].i
2366 q__1.r = ab[i__2].r - q__2.r, q__1.i = ab[i__2].i -
2368 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
2376 /* post-multiply X by inv(S(i)) */
2379 csscal_(&nx, &r__1, &x[i__ * x_dim1 + 1], &c__1);
2381 q__1.r = -1.f, q__1.i = 0.f;
2382 cgerc_(&nx, &kbt, &q__1, &x[i__ * x_dim1 + 1], &c__1, &bb[
2383 i__ * bb_dim1 + 2], &c__1, &x[(i__ + 1) * x_dim1
2388 /* store a(i,i1) in RA1 for use in next loop over K */
2390 i__4 = i__ - i1 + 1 + i1 * ab_dim1;
2391 ra1.r = ab[i__4].r, ra1.i = ab[i__4].i;
2394 /* Generate and apply vectors of rotations to chase all the */
2395 /* existing bulges KA positions up toward the top of the band */
2398 for (k = 1; k <= i__4; ++k) {
2401 /* Determine the rotations which would annihilate the bulge */
2402 /* which has in theory just been created */
2404 if (i__ + k - ka1 > 0 && i__ + k < m) {
2406 /* generate rotation to annihilate a(i,i+k-ka-1) */
2408 clartg_(&ab[ka1 - k + (i__ + k - *ka) * ab_dim1], &ra1, &
2409 rwork[i__ + k - *ka], &work[i__ + k - *ka], &ra);
2411 /* create nonzero element a(i+k,i+k-ka-1) outside the */
2412 /* band and store it in WORK(m-kb+i+k) */
2414 i__3 = k + 1 + i__ * bb_dim1;
2415 q__2.r = -bb[i__3].r, q__2.i = -bb[i__3].i;
2416 q__1.r = q__2.r * ra1.r - q__2.i * ra1.i, q__1.i = q__2.r
2417 * ra1.i + q__2.i * ra1.r;
2418 t.r = q__1.r, t.i = q__1.i;
2419 i__3 = m - *kb + i__ + k;
2420 i__1 = i__ + k - *ka;
2421 q__2.r = rwork[i__1] * t.r, q__2.i = rwork[i__1] * t.i;
2422 r_cnjg(&q__4, &work[i__ + k - *ka]);
2423 i__2 = ka1 + (i__ + k - *ka) * ab_dim1;
2424 q__3.r = q__4.r * ab[i__2].r - q__4.i * ab[i__2].i,
2425 q__3.i = q__4.r * ab[i__2].i + q__4.i * ab[i__2]
2427 q__1.r = q__2.r - q__3.r, q__1.i = q__2.i - q__3.i;
2428 work[i__3].r = q__1.r, work[i__3].i = q__1.i;
2429 i__3 = ka1 + (i__ + k - *ka) * ab_dim1;
2430 i__1 = i__ + k - *ka;
2431 q__2.r = work[i__1].r * t.r - work[i__1].i * t.i, q__2.i =
2432 work[i__1].r * t.i + work[i__1].i * t.r;
2433 i__2 = i__ + k - *ka;
2434 i__5 = ka1 + (i__ + k - *ka) * ab_dim1;
2435 q__3.r = rwork[i__2] * ab[i__5].r, q__3.i = rwork[i__2] *
2437 q__1.r = q__2.r + q__3.r, q__1.i = q__2.i + q__3.i;
2438 ab[i__3].r = q__1.r, ab[i__3].i = q__1.i;
2439 ra1.r = ra.r, ra1.i = ra.i;
2443 i__3 = 1, i__1 = k + i0 - m + 1;
2444 j2 = i__ + k + 1 - f2cmax(i__3,i__1) * ka1;
2445 nr = (j2 + *ka - 1) / ka1;
2446 j1 = j2 - (nr - 1) * ka1;
2449 i__3 = j2, i__1 = i__ - (*ka << 1) + k - 1;
2450 j2t = f2cmin(i__3,i__1);
2454 nrt = (j2t + *ka - 1) / ka1;
2457 for (j = j1; i__1 < 0 ? j >= i__3 : j <= i__3; j += i__1) {
2459 /* create nonzero element a(j+ka,j-1) outside the band */
2460 /* and store it in WORK(j) */
2464 i__6 = ka1 + (j - 1) * ab_dim1;
2465 q__1.r = work[i__5].r * ab[i__6].r - work[i__5].i * ab[i__6]
2466 .i, q__1.i = work[i__5].r * ab[i__6].i + work[i__5].i
2468 work[i__2].r = q__1.r, work[i__2].i = q__1.i;
2469 i__2 = ka1 + (j - 1) * ab_dim1;
2471 i__6 = ka1 + (j - 1) * ab_dim1;
2472 q__1.r = rwork[i__5] * ab[i__6].r, q__1.i = rwork[i__5] * ab[
2474 ab[i__2].r = q__1.r, ab[i__2].i = q__1.i;
2478 /* generate rotations in 1st set to annihilate elements which */
2479 /* have been created outside the band */
2482 clargv_(&nrt, &ab[ka1 + j1 * ab_dim1], &inca, &work[j1], &ka1,
2487 /* apply rotations in 1st set from the right */
2490 for (l = 1; l <= i__1; ++l) {
2491 clartv_(&nr, &ab[l + 1 + j1 * ab_dim1], &inca, &ab[l + 2
2492 + (j1 - 1) * ab_dim1], &inca, &rwork[j1], &work[
2497 /* apply rotations in 1st set from both sides to diagonal */
2500 clar2v_(&nr, &ab[j1 * ab_dim1 + 1], &ab[(j1 - 1) * ab_dim1 +
2501 1], &ab[(j1 - 1) * ab_dim1 + 2], &inca, &rwork[j1], &
2504 clacgv_(&nr, &work[j1], &ka1);
2507 /* start applying rotations in 1st set from the left */
2510 for (l = *ka - 1; l >= i__1; --l) {
2511 nrt = (j2 + l - 1) / ka1;
2512 j1t = j2 - (nrt - 1) * ka1;
2514 clartv_(&nrt, &ab[ka1 - l + 1 + (j1t - ka1 + l) * ab_dim1]
2515 , &inca, &ab[ka1 - l + (j1t - ka1 + l) * ab_dim1],
2516 &inca, &rwork[j1t], &work[j1t], &ka1);
2523 /* post-multiply X by product of rotations in 1st set */
2527 for (j = j1; i__3 < 0 ? j >= i__1 : j <= i__1; j += i__3) {
2528 r_cnjg(&q__1, &work[j]);
2529 crot_(&nx, &x[j * x_dim1 + 1], &c__1, &x[(j - 1) * x_dim1
2530 + 1], &c__1, &rwork[j], &q__1);
2538 if (i2 > 0 && kbt > 0) {
2540 /* create nonzero element a(i+kbt,i+kbt-ka-1) outside the */
2541 /* band and store it in WORK(m-kb+i+kbt) */
2543 i__4 = m - *kb + i__ + kbt;
2544 i__3 = kbt + 1 + i__ * bb_dim1;
2545 q__2.r = -bb[i__3].r, q__2.i = -bb[i__3].i;
2546 q__1.r = q__2.r * ra1.r - q__2.i * ra1.i, q__1.i = q__2.r *
2547 ra1.i + q__2.i * ra1.r;
2548 work[i__4].r = q__1.r, work[i__4].i = q__1.i;
2552 for (k = *kb; k >= 1; --k) {
2555 i__4 = 2, i__3 = k + i0 - m;
2556 j2 = i__ + k + 1 - f2cmax(i__4,i__3) * ka1;
2559 i__4 = 1, i__3 = k + i0 - m;
2560 j2 = i__ + k + 1 - f2cmax(i__4,i__3) * ka1;
2563 /* finish applying rotations in 2nd set from the left */
2565 for (l = *kb - k; l >= 1; --l) {
2566 nrt = (j2 + *ka + l - 1) / ka1;
2567 j1t = j2 - (nrt - 1) * ka1;
2569 clartv_(&nrt, &ab[ka1 - l + 1 + (j1t + l - 1) * ab_dim1],
2570 &inca, &ab[ka1 - l + (j1t + l - 1) * ab_dim1], &
2571 inca, &rwork[m - *kb + j1t + *ka], &work[m - *kb
2572 + j1t + *ka], &ka1);
2576 nr = (j2 + *ka - 1) / ka1;
2577 j1 = j2 - (nr - 1) * ka1;
2580 for (j = j1; i__3 < 0 ? j >= i__4 : j <= i__4; j += i__3) {
2582 i__2 = m - *kb + j + *ka;
2583 work[i__1].r = work[i__2].r, work[i__1].i = work[i__2].i;
2584 rwork[m - *kb + j] = rwork[m - *kb + j + *ka];
2589 for (j = j1; i__4 < 0 ? j >= i__3 : j <= i__3; j += i__4) {
2591 /* create nonzero element a(j+ka,j-1) outside the band */
2592 /* and store it in WORK(m-kb+j) */
2596 i__5 = ka1 + (j - 1) * ab_dim1;
2597 q__1.r = work[i__2].r * ab[i__5].r - work[i__2].i * ab[i__5]
2598 .i, q__1.i = work[i__2].r * ab[i__5].i + work[i__2].i
2600 work[i__1].r = q__1.r, work[i__1].i = q__1.i;
2601 i__1 = ka1 + (j - 1) * ab_dim1;
2603 i__5 = ka1 + (j - 1) * ab_dim1;
2604 q__1.r = rwork[i__2] * ab[i__5].r, q__1.i = rwork[i__2] * ab[
2606 ab[i__1].r = q__1.r, ab[i__1].i = q__1.i;
2610 if (i__ + k > ka1 && k <= kbt) {
2611 i__4 = m - *kb + i__ + k - *ka;
2612 i__3 = m - *kb + i__ + k;
2613 work[i__4].r = work[i__3].r, work[i__4].i = work[i__3].i;
2619 for (k = *kb; k >= 1; --k) {
2621 i__4 = 1, i__3 = k + i0 - m;
2622 j2 = i__ + k + 1 - f2cmax(i__4,i__3) * ka1;
2623 nr = (j2 + *ka - 1) / ka1;
2624 j1 = j2 - (nr - 1) * ka1;
2627 /* generate rotations in 2nd set to annihilate elements */
2628 /* which have been created outside the band */
2630 clargv_(&nr, &ab[ka1 + j1 * ab_dim1], &inca, &work[m - *kb +
2631 j1], &ka1, &rwork[m - *kb + j1], &ka1);
2633 /* apply rotations in 2nd set from the right */
2636 for (l = 1; l <= i__4; ++l) {
2637 clartv_(&nr, &ab[l + 1 + j1 * ab_dim1], &inca, &ab[l + 2
2638 + (j1 - 1) * ab_dim1], &inca, &rwork[m - *kb + j1]
2639 , &work[m - *kb + j1], &ka1);
2643 /* apply rotations in 2nd set from both sides to diagonal */
2646 clar2v_(&nr, &ab[j1 * ab_dim1 + 1], &ab[(j1 - 1) * ab_dim1 +
2647 1], &ab[(j1 - 1) * ab_dim1 + 2], &inca, &rwork[m - *
2648 kb + j1], &work[m - *kb + j1], &ka1);
2650 clacgv_(&nr, &work[m - *kb + j1], &ka1);
2653 /* start applying rotations in 2nd set from the left */
2656 for (l = *ka - 1; l >= i__4; --l) {
2657 nrt = (j2 + l - 1) / ka1;
2658 j1t = j2 - (nrt - 1) * ka1;
2660 clartv_(&nrt, &ab[ka1 - l + 1 + (j1t - ka1 + l) * ab_dim1]
2661 , &inca, &ab[ka1 - l + (j1t - ka1 + l) * ab_dim1],
2662 &inca, &rwork[m - *kb + j1t], &work[m - *kb +
2670 /* post-multiply X by product of rotations in 2nd set */
2674 for (j = j1; i__3 < 0 ? j >= i__4 : j <= i__4; j += i__3) {
2675 r_cnjg(&q__1, &work[m - *kb + j]);
2676 crot_(&nx, &x[j * x_dim1 + 1], &c__1, &x[(j - 1) * x_dim1
2677 + 1], &c__1, &rwork[m - *kb + j], &q__1);
2685 for (k = 1; k <= i__3; ++k) {
2687 i__4 = 1, i__1 = k + i0 - m + 1;
2688 j2 = i__ + k + 1 - f2cmax(i__4,i__1) * ka1;
2690 /* finish applying rotations in 1st set from the left */
2692 for (l = *kb - k; l >= 1; --l) {
2693 nrt = (j2 + l - 1) / ka1;
2694 j1t = j2 - (nrt - 1) * ka1;
2696 clartv_(&nrt, &ab[ka1 - l + 1 + (j1t - ka1 + l) * ab_dim1]
2697 , &inca, &ab[ka1 - l + (j1t - ka1 + l) * ab_dim1],
2698 &inca, &rwork[j1t], &work[j1t], &ka1);
2707 for (j = 2; j <= i__3; ++j) {
2708 rwork[j] = rwork[j + *ka];
2711 work[i__4].r = work[i__1].r, work[i__4].i = work[i__1].i;