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37 #include "gmx_lapack.h"
38 #include "lapack_limits.h"
40 #include <types/simple.h>
43 F77_FUNC(slasq1,SLASQ1)(int *n,
56 minval = GMX_FLOAT_MIN;
57 safemin = minval*(1.0+GMX_FLOAT_EPS);
71 d[*n-1] = fabs(d[*n-1]);
73 if(fabs(sigmx)<GMX_FLOAT_MIN) {
74 F77_FUNC(slasrt,SLASRT)("D",n,d,&iinfo);
83 /* Copy d and e into work (z format) and scale.
84 * Squaring input data makes scaling by a power of the
87 scale = sqrt(eps/safemin);
90 F77_FUNC(scopy,SCOPY)(n,d,&i,work,&j);
92 F77_FUNC(scopy,SCOPY)(&k,e,&i,work+1,&j);
96 F77_FUNC(slascl,SLASCL)("G",&i,&i,&sigmx,&scale,&j,&k,work,&j,&iinfo);
99 /* Compute q and e elements */
100 for(i=0;i<2*(*n)-1;i++)
101 work[i] = work[i]*work[i];
103 work[2*(*n)-1] = 0.0;
105 F77_FUNC(slasq2,SLASQ2)(n,work,info);
112 F77_FUNC(slascl,SLASCL)("G",&j,&j,&scale,&sigmx,n,&k,d,n,&iinfo);