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36 #include "gmx_lapack.h"
39 F77_FUNC(dlasq5,DLASQ5)(int *i0,
57 static double emin, temp;
61 if (*n0 - *i0 - 1 <= 0) {
65 j4 = (*i0 << 2) + *pp - 3;
75 for (j4 = *i0 << 2; j4 <= i__1; j4 += 4) {
76 z__[j4 - 2] = d__ + z__[j4 - 1];
77 temp = z__[j4 + 1] / z__[j4 - 2];
78 d__ = d__ * temp - *tau;
81 z__[j4] = z__[j4 - 1] * temp;
88 for (j4 = *i0 << 2; j4 <= i__1; j4 += 4) {
89 z__[j4 - 3] = d__ + z__[j4];
90 temp = z__[j4 + 2] / z__[j4 - 3];
91 d__ = d__ * temp - *tau;
94 z__[j4 - 1] = z__[j4] * temp;
103 j4 = 4*(*n0 - 2) - *pp;
104 j4p2 = j4 + (*pp << 1) - 1;
105 z__[j4 - 2] = *dnm2 + z__[j4p2];
106 z__[j4] = z__[j4p2 + 2] * (z__[j4p2] / z__[j4 - 2]);
107 *dnm1 = z__[j4p2 + 2] * (*dnm2 / z__[j4 - 2]) - *tau;
113 j4p2 = j4 + (*pp << 1) - 1;
114 z__[j4 - 2] = *dnm1 + z__[j4p2];
115 z__[j4] = z__[j4p2 + 2] * (z__[j4p2] / z__[j4 - 2]);
116 *dn = z__[j4p2 + 2] * (*dnm1 / z__[j4 - 2]) - *tau;
124 for (j4 = *i0 << 2; j4 <= i__1; j4 += 4) {
125 z__[j4 - 2] = d__ + z__[j4 - 1];
129 z__[j4] = z__[j4 + 1] * (z__[j4 - 1] / z__[j4 - 2]);
130 d__ = z__[j4 + 1] * (d__ / z__[j4 - 2]) - *tau;
134 d__1 = emin, d__2 = z__[j4];
135 emin = (d__1<d__2) ? d__1 : d__2;
139 for (j4 = *i0 << 2; j4 <= i__1; j4 += 4) {
140 z__[j4 - 3] = d__ + z__[j4];
144 z__[j4 - 1] = z__[j4 + 2] * (z__[j4] / z__[j4 - 3]);
145 d__ = z__[j4 + 2] * (d__ / z__[j4 - 3]) - *tau;
149 d__1 = emin, d__2 = z__[j4 - 1];
150 emin = (d__1<d__2) ? d__1 : d__2;
156 j4 = 4*(*n0 - 2) - *pp;
157 j4p2 = j4 + (*pp << 1) - 1;
158 z__[j4 - 2] = *dnm2 + z__[j4p2];
162 z__[j4] = z__[j4p2 + 2] * (z__[j4p2] / z__[j4 - 2]);
163 *dnm1 = z__[j4p2 + 2] * (*dnm2 / z__[j4 - 2]) - *tau;
170 j4p2 = j4 + (*pp << 1) - 1;
171 z__[j4 - 2] = *dnm1 + z__[j4p2];
175 z__[j4] = z__[j4p2 + 2] * (z__[j4p2] / z__[j4 - 2]);
176 *dn = z__[j4p2 + 2] * (*dnm1 / z__[j4 - 2]) - *tau;
184 z__[(*n0 << 2) - *pp] = emin;