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#include "rb_lapack.h"
extern VOID dlasd8_(integer* icompq, integer* k, doublereal* d, doublereal* z, doublereal* vf, doublereal* vl, doublereal* difl, doublereal* difr, integer* lddifr, doublereal* dsigma, doublereal* work, integer* info);
static VALUE
rblapack_dlasd8(int argc, VALUE *argv, VALUE self){
VALUE rblapack_icompq;
integer icompq;
VALUE rblapack_z;
doublereal *z;
VALUE rblapack_vf;
doublereal *vf;
VALUE rblapack_vl;
doublereal *vl;
VALUE rblapack_dsigma;
doublereal *dsigma;
VALUE rblapack_d;
doublereal *d;
VALUE rblapack_difl;
doublereal *difl;
VALUE rblapack_difr;
doublereal *difr;
VALUE rblapack_info;
integer info;
VALUE rblapack_z_out__;
doublereal *z_out__;
VALUE rblapack_vf_out__;
doublereal *vf_out__;
VALUE rblapack_vl_out__;
doublereal *vl_out__;
VALUE rblapack_dsigma_out__;
doublereal *dsigma_out__;
doublereal *work;
integer k;
integer lddifr;
VALUE rblapack_options;
if (argc > 0 && TYPE(argv[argc-1]) == T_HASH) {
argc--;
rblapack_options = argv[argc];
if (rb_hash_aref(rblapack_options, sHelp) == Qtrue) {
printf("%s\n", "USAGE:\n d, difl, difr, info, z, vf, vl, dsigma = NumRu::Lapack.dlasd8( icompq, z, vf, vl, dsigma, [:usage => usage, :help => help])\n\n\nFORTRAN MANUAL\n SUBROUTINE DLASD8( ICOMPQ, K, D, Z, VF, VL, DIFL, DIFR, LDDIFR, DSIGMA, WORK, INFO )\n\n* Purpose\n* =======\n*\n* DLASD8 finds the square roots of the roots of the secular equation,\n* as defined by the values in DSIGMA and Z. It makes the appropriate\n* calls to DLASD4, and stores, for each element in D, the distance\n* to its two nearest poles (elements in DSIGMA). It also updates\n* the arrays VF and VL, the first and last components of all the\n* right singular vectors of the original bidiagonal matrix.\n*\n* DLASD8 is called from DLASD6.\n*\n\n* Arguments\n* =========\n*\n* ICOMPQ (input) INTEGER\n* Specifies whether singular vectors are to be computed in\n* factored form in the calling routine:\n* = 0: Compute singular values only.\n* = 1: Compute singular vectors in factored form as well.\n*\n* K (input) INTEGER\n* The number of terms in the rational function to be solved\n* by DLASD4. K >= 1.\n*\n* D (output) DOUBLE PRECISION array, dimension ( K )\n* On output, D contains the updated singular values.\n*\n* Z (input/output) DOUBLE PRECISION array, dimension ( K )\n* On entry, the first K elements of this array contain the\n* components of the deflation-adjusted updating row vector.\n* On exit, Z is updated.\n*\n* VF (input/output) DOUBLE PRECISION array, dimension ( K )\n* On entry, VF contains information passed through DBEDE8.\n* On exit, VF contains the first K components of the first\n* components of all right singular vectors of the bidiagonal\n* matrix.\n*\n* VL (input/output) DOUBLE PRECISION array, dimension ( K )\n* On entry, VL contains information passed through DBEDE8.\n* On exit, VL contains the first K components of the last\n* components of all right singular vectors of the bidiagonal\n* matrix.\n*\n* DIFL (output) DOUBLE PRECISION array, dimension ( K )\n* On exit, DIFL(I) = D(I) - DSIGMA(I).\n*\n* DIFR (output) DOUBLE PRECISION array,\n* dimension ( LDDIFR, 2 ) if ICOMPQ = 1 and\n* dimension ( K ) if ICOMPQ = 0.\n* On exit, DIFR(I,1) = D(I) - DSIGMA(I+1), DIFR(K,1) is not\n* defined and will not be referenced.\n*\n* If ICOMPQ = 1, DIFR(1:K,2) is an array containing the\n* normalizing factors for the right singular vector matrix.\n*\n* LDDIFR (input) INTEGER\n* The leading dimension of DIFR, must be at least K.\n*\n* DSIGMA (input/output) DOUBLE PRECISION array, dimension ( K )\n* On entry, the first K elements of this array contain the old\n* roots of the deflated updating problem. These are the poles\n* of the secular equation.\n* On exit, the elements of DSIGMA may be very slightly altered\n* in value.\n*\n* WORK (workspace) DOUBLE PRECISION array, dimension at least 3 * K\n*\n* INFO (output) INTEGER\n* = 0: successful exit.\n* < 0: if INFO = -i, the i-th argument had an illegal value.\n* > 0: if INFO = 1, a singular value did not converge\n*\n\n* Further Details\n* ===============\n*\n* Based on contributions by\n* Ming Gu and Huan Ren, Computer Science Division, University of\n* California at Berkeley, USA\n*\n* =====================================================================\n*\n\n");
return Qnil;
}
if (rb_hash_aref(rblapack_options, sUsage) == Qtrue) {
printf("%s\n", "USAGE:\n d, difl, difr, info, z, vf, vl, dsigma = NumRu::Lapack.dlasd8( icompq, z, vf, vl, dsigma, [:usage => usage, :help => help])\n");
return Qnil;
}
} else
rblapack_options = Qnil;
if (argc != 5 && argc != 5)
rb_raise(rb_eArgError,"wrong number of arguments (%d for 5)", argc);
rblapack_icompq = argv[0];
rblapack_z = argv[1];
rblapack_vf = argv[2];
rblapack_vl = argv[3];
rblapack_dsigma = argv[4];
if (argc == 5) {
} else if (rblapack_options != Qnil) {
} else {
}
icompq = NUM2INT(rblapack_icompq);
if (!NA_IsNArray(rblapack_vf))
rb_raise(rb_eArgError, "vf (3th argument) must be NArray");
if (NA_RANK(rblapack_vf) != 1)
rb_raise(rb_eArgError, "rank of vf (3th argument) must be %d", 1);
k = NA_SHAPE0(rblapack_vf);
if (NA_TYPE(rblapack_vf) != NA_DFLOAT)
rblapack_vf = na_change_type(rblapack_vf, NA_DFLOAT);
vf = NA_PTR_TYPE(rblapack_vf, doublereal*);
if (!NA_IsNArray(rblapack_dsigma))
rb_raise(rb_eArgError, "dsigma (5th argument) must be NArray");
if (NA_RANK(rblapack_dsigma) != 1)
rb_raise(rb_eArgError, "rank of dsigma (5th argument) must be %d", 1);
if (NA_SHAPE0(rblapack_dsigma) != k)
rb_raise(rb_eRuntimeError, "shape 0 of dsigma must be the same as shape 0 of vf");
if (NA_TYPE(rblapack_dsigma) != NA_DFLOAT)
rblapack_dsigma = na_change_type(rblapack_dsigma, NA_DFLOAT);
dsigma = NA_PTR_TYPE(rblapack_dsigma, doublereal*);
if (!NA_IsNArray(rblapack_z))
rb_raise(rb_eArgError, "z (2th argument) must be NArray");
if (NA_RANK(rblapack_z) != 1)
rb_raise(rb_eArgError, "rank of z (2th argument) must be %d", 1);
if (NA_SHAPE0(rblapack_z) != k)
rb_raise(rb_eRuntimeError, "shape 0 of z must be the same as shape 0 of vf");
if (NA_TYPE(rblapack_z) != NA_DFLOAT)
rblapack_z = na_change_type(rblapack_z, NA_DFLOAT);
z = NA_PTR_TYPE(rblapack_z, doublereal*);
if (!NA_IsNArray(rblapack_vl))
rb_raise(rb_eArgError, "vl (4th argument) must be NArray");
if (NA_RANK(rblapack_vl) != 1)
rb_raise(rb_eArgError, "rank of vl (4th argument) must be %d", 1);
if (NA_SHAPE0(rblapack_vl) != k)
rb_raise(rb_eRuntimeError, "shape 0 of vl must be the same as shape 0 of vf");
if (NA_TYPE(rblapack_vl) != NA_DFLOAT)
rblapack_vl = na_change_type(rblapack_vl, NA_DFLOAT);
vl = NA_PTR_TYPE(rblapack_vl, doublereal*);
lddifr = k;
{
na_shape_t shape[1];
shape[0] = k;
rblapack_d = na_make_object(NA_DFLOAT, 1, shape, cNArray);
}
d = NA_PTR_TYPE(rblapack_d, doublereal*);
{
na_shape_t shape[1];
shape[0] = k;
rblapack_difl = na_make_object(NA_DFLOAT, 1, shape, cNArray);
}
difl = NA_PTR_TYPE(rblapack_difl, doublereal*);
{
na_shape_t shape[2];
shape[0] = icompq == 1 ? lddifr : icompq == 0 ? k : 0;
shape[1] = icompq == 1 ? 2 : 0;
rblapack_difr = na_make_object(NA_DFLOAT, 2, shape, cNArray);
}
difr = NA_PTR_TYPE(rblapack_difr, doublereal*);
{
na_shape_t shape[1];
shape[0] = k;
rblapack_z_out__ = na_make_object(NA_DFLOAT, 1, shape, cNArray);
}
z_out__ = NA_PTR_TYPE(rblapack_z_out__, doublereal*);
MEMCPY(z_out__, z, doublereal, NA_TOTAL(rblapack_z));
rblapack_z = rblapack_z_out__;
z = z_out__;
{
na_shape_t shape[1];
shape[0] = k;
rblapack_vf_out__ = na_make_object(NA_DFLOAT, 1, shape, cNArray);
}
vf_out__ = NA_PTR_TYPE(rblapack_vf_out__, doublereal*);
MEMCPY(vf_out__, vf, doublereal, NA_TOTAL(rblapack_vf));
rblapack_vf = rblapack_vf_out__;
vf = vf_out__;
{
na_shape_t shape[1];
shape[0] = k;
rblapack_vl_out__ = na_make_object(NA_DFLOAT, 1, shape, cNArray);
}
vl_out__ = NA_PTR_TYPE(rblapack_vl_out__, doublereal*);
MEMCPY(vl_out__, vl, doublereal, NA_TOTAL(rblapack_vl));
rblapack_vl = rblapack_vl_out__;
vl = vl_out__;
{
na_shape_t shape[1];
shape[0] = k;
rblapack_dsigma_out__ = na_make_object(NA_DFLOAT, 1, shape, cNArray);
}
dsigma_out__ = NA_PTR_TYPE(rblapack_dsigma_out__, doublereal*);
MEMCPY(dsigma_out__, dsigma, doublereal, NA_TOTAL(rblapack_dsigma));
rblapack_dsigma = rblapack_dsigma_out__;
dsigma = dsigma_out__;
work = ALLOC_N(doublereal, (3 * k));
dlasd8_(&icompq, &k, d, z, vf, vl, difl, difr, &lddifr, dsigma, work, &info);
free(work);
rblapack_info = INT2NUM(info);
return rb_ary_new3(8, rblapack_d, rblapack_difl, rblapack_difr, rblapack_info, rblapack_z, rblapack_vf, rblapack_vl, rblapack_dsigma);
}
void
init_lapack_dlasd8(VALUE mLapack, VALUE sH, VALUE sU, VALUE zero){
sHelp = sH;
sUsage = sU;
rblapack_ZERO = zero;
rb_define_module_function(mLapack, "dlasd8", rblapack_dlasd8, -1);
}
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