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35 #include "gmx_lapack.h"
36 #include "lapack_limits.h"
39 F77_FUNC(sgeqrf,SGEQRF)(int *m,
48 int a_dim1, a_offset, i__1, i__2, i__3, i__4;
50 int i__, k, ib, nb, nx, iws, nbmin, iinfo;
54 a_offset = 1 + a_dim1;
60 nb = DGEQRF_BLOCKSIZE;
62 work[1] = (float) lwkopt;
67 k = (*m < *n) ? *m : *n;
76 if (nb > 1 && nb < k) {
78 nx = DGEQRF_CROSSOVER;
86 nbmin = DGEQRF_MINBLOCKSIZE;
91 if (nb >= nbmin && nb < k && nx < k) {
94 for (i__ = 1; i__2 < 0 ? i__ >= i__1 : i__ <= i__1; i__ += i__2) {
97 ib = (i__3 < nb) ? i__3 : nb;
100 F77_FUNC(sgeqr2,SGEQR2)(&i__3, &ib, &a[i__ + i__ * a_dim1], lda, &tau[i__], &work[
102 if (i__ + ib <= *n) {
105 F77_FUNC(slarft,SLARFT)("Forward", "Columnwise", &i__3, &ib, &a[i__ + i__ *
106 a_dim1], lda, &tau[i__], &work[1], &ldwork);
109 i__4 = *n - i__ - ib + 1;
110 F77_FUNC(slarfb,SLARFB)("Left", "Transpose", "Forward", "Columnwise", &i__3, &
111 i__4, &ib, &a[i__ + i__ * a_dim1], lda, &work[1], &
112 ldwork, &a[i__ + (i__ + ib) * a_dim1], lda, &work[ib
123 F77_FUNC(sgeqr2,SGEQR2)(&i__2, &i__1, &a[i__ + i__ * a_dim1], lda, &tau[i__], &work[1]
127 work[1] = (float) iws;