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35 #include "gmx_lapack.h"
38 F77_FUNC(sgebd2,SGEBD2)(int *m,
55 /* reduce to upper bidiag. form */
58 i2 = ( (i+1) < (*m-1)) ? (i+1) : (*m-1);
60 F77_FUNC(slarfg,SLARFG)(&i1,&(a[i*(*lda)+i]),&(a[i*(*lda)+i2]),&i3,&(tauq[i]));
64 F77_FUNC(slarf,SLARF)("L",&i1,&i2,&(a[i*(*lda)+i]),&i3,&(tauq[i]),&(a[(i+1)*(*lda)+i]),lda,work);
70 i2 = ( (i+2) < (*n-1)) ? (i+2) : (*n-1);
71 F77_FUNC(slarfg,SLARFG)(&i1,&(a[(i+1)*(*lda)+i]),&(a[i2*(*lda)+i]),lda,&(taup[i]));
73 e[i] = a[(i+1)*(*lda)+i];
74 a[(i+1)*(*lda)+i] = 1.0;
78 F77_FUNC(slarf,SLARF)("R",&i1,&i2,&(a[(i+1)*(*lda)+i]),lda,&(taup[i]),&(a[(i+1)*(*lda)+i+1]),lda,work);
79 a[(i+1)*(*lda)+i] = e[i];
84 /* reduce to lower bidiag. form */
87 i2 = ( (i+1) < (*n-1)) ? (i+1) : (*n-1);
89 F77_FUNC(slarfg,SLARFG)(&i1,&(a[i*(*lda)+i]),&(a[i2*(*lda)+i]),lda,&(taup[i]));
94 i3 = ( (i+1) < (*m-1)) ? (i+1) : (*m-1);
95 F77_FUNC(slarf,SLARF)("R",&i2,&i1,&(a[i*(*lda)+i]),lda,&(taup[i]),&(a[(i)*(*lda)+i3]),lda,work);
101 i2 = ( (i+2) < (*m-1)) ? (i+2) : (*m-1);
103 F77_FUNC(slarfg,SLARFG)(&i1,&(a[(i)*(*lda)+i+1]),&(a[i*(*lda)+i2]),&i3,&(tauq[i]));
105 e[i] = a[(i)*(*lda)+i+1];
106 a[(i)*(*lda)+i+1] = 1.0;
111 F77_FUNC(slarf,SLARF)("L",&i1,&i2,&(a[(i)*(*lda)+i+1]),&i3,&(tauq[i]),&(a[(i+1)*(*lda)+i+1]),lda,work);
112 a[(i)*(*lda)+i+1] = e[i];