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37 #include <types/simple.h>
40 #include "gmx_lapack.h"
41 #include "lapack_limits.h"
45 F77_FUNC(slarrfx,SLARRFX)(int *n,
64 float s, eps, tmp, dmax1, dmax2, delta;
80 dplus[1] = d__[1] + s;
81 dmax1 = fabs(dplus[1]);
83 for (i__ = 1; i__ <= i__1; ++i__) {
84 lplus[i__] = ld[i__] / dplus[i__];
85 s = s * lplus[i__] * l[i__] - *sigma;
86 dplus[i__ + 1] = d__[i__ + 1] + s;
87 d__2 = dmax1, d__3 = fabs(dplus[i__ + 1]);
88 dmax1 = (d__2>d__3) ? d__2 : d__3;
90 if (! (dmax1 > 0. || dmax1 < 1.)) {
91 *sigma -= fabs(*sigma) * delta;
100 work[1] = d__[1] + s;
101 dmax2 = fabs(work[1]);
103 for (i__ = 1; i__ <= i__1; ++i__) {
104 work[*n + i__] = ld[i__] / work[i__];
105 s = s * work[*n + i__] * l[i__] - tmp;
106 work[i__ + 1] = d__[i__ + 1] + s;
107 d__2 = dmax2, d__3 = fabs(work[i__ + 1]);
108 dmax2 = (d__2>d__3) ? d__2 : d__3;
110 if (! (dmax2 > 0. || dmax2 < 1.)) {
111 tmp += fabs(tmp) * delta;
117 F77_FUNC(scopy,SCOPY)(n, &work[1], &i1, &dplus[1], &i1);
119 F77_FUNC(scopy,SCOPY)(&i__1, &work[*n + 1], &i1, &lplus[1], &i1);