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35 #include "gmx_lapack.h"
38 F77_FUNC(dgebd2,DGEBD2)(int *m,
54 /* reduce to upper bidiag. form */
57 i2 = ( (i+1) < (*m-1)) ? (i+1) : (*m-1);
59 F77_FUNC(dlarfg,DLARFG)(&i1,&(a[i*(*lda)+i]),&(a[i*(*lda)+i2]),&i3,&(tauq[i]));
63 F77_FUNC(dlarf,DLARF)("L",&i1,&i2,&(a[i*(*lda)+i]),&i3,&(tauq[i]),&(a[(i+1)*(*lda)+i]),lda,work);
69 i2 = ( (i+2) < (*n-1)) ? (i+2) : (*n-1);
70 F77_FUNC(dlarfg,DLARFG)(&i1,&(a[(i+1)*(*lda)+i]),&(a[i2*(*lda)+i]),lda,&(taup[i]));
72 e[i] = a[(i+1)*(*lda)+i];
73 a[(i+1)*(*lda)+i] = 1.0;
77 F77_FUNC(dlarf,DLARF)("R",&i1,&i2,&(a[(i+1)*(*lda)+i]),lda,&(taup[i]),&(a[(i+1)*(*lda)+i+1]),lda,work);
78 a[(i+1)*(*lda)+i] = e[i];
83 /* reduce to lower bidiag. form */
86 i2 = ( (i+1) < (*n-1)) ? (i+1) : (*n-1);
88 F77_FUNC(dlarfg,DLARFG)(&i1,&(a[i*(*lda)+i]),&(a[i2*(*lda)+i]),lda,&(taup[i]));
93 i3 = ( (i+1) < (*m-1)) ? (i+1) : (*m-1);
94 F77_FUNC(dlarf,DLARF)("R",&i2,&i1,&(a[i*(*lda)+i]),lda,&(taup[i]),&(a[(i)*(*lda)+i3]),lda,work);
100 i2 = ( (i+2) < (*m-1)) ? (i+2) : (*m-1);
102 F77_FUNC(dlarfg,DLARFG)(&i1,&(a[(i)*(*lda)+i+1]),&(a[i*(*lda)+i2]),&i3,&(tauq[i]));
104 e[i] = a[(i)*(*lda)+i+1];
105 a[(i)*(*lda)+i+1] = 1.0;
110 F77_FUNC(dlarf,DLARF)("L",&i1,&i2,&(a[(i)*(*lda)+i+1]),&i3,&(tauq[i]),&(a[(i+1)*(*lda)+i+1]),lda,work);
111 a[(i)*(*lda)+i+1] = e[i];