148 lines
7.0 KiB
C++
148 lines
7.0 KiB
C++
#ifdef __cplusplus
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extern "C" {
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#endif
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#include "lmp_f2c.h"
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static doublereal c_b5 = -1.;
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static doublereal c_b6 = 1.;
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static integer c__1 = 1;
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static doublereal c_b16 = 0.;
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int dlatrd_(char *uplo, integer *n, integer *nb, doublereal *a, integer *lda, doublereal *e,
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doublereal *tau, doublereal *w, integer *ldw, ftnlen uplo_len)
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{
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integer a_dim1, a_offset, w_dim1, w_offset, i__1, i__2, i__3;
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integer i__, iw;
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extern doublereal ddot_(integer *, doublereal *, integer *, doublereal *, integer *);
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doublereal alpha;
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extern int dscal_(integer *, doublereal *, doublereal *, integer *);
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extern logical lsame_(char *, char *, ftnlen, ftnlen);
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extern int dgemv_(char *, integer *, integer *, doublereal *, doublereal *, integer *,
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doublereal *, integer *, doublereal *, doublereal *, integer *, ftnlen),
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daxpy_(integer *, doublereal *, doublereal *, integer *, doublereal *, integer *),
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dsymv_(char *, integer *, doublereal *, doublereal *, integer *, doublereal *, integer *,
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doublereal *, doublereal *, integer *, ftnlen),
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dlarfg_(integer *, doublereal *, doublereal *, integer *, doublereal *);
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a_dim1 = *lda;
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a_offset = 1 + a_dim1;
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a -= a_offset;
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--e;
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--tau;
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w_dim1 = *ldw;
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w_offset = 1 + w_dim1;
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w -= w_offset;
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if (*n <= 0) {
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return 0;
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}
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if (lsame_(uplo, (char *)"U", (ftnlen)1, (ftnlen)1)) {
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i__1 = *n - *nb + 1;
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for (i__ = *n; i__ >= i__1; --i__) {
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iw = i__ - *n + *nb;
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if (i__ < *n) {
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i__2 = *n - i__;
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dgemv_((char *)"No transpose", &i__, &i__2, &c_b5, &a[(i__ + 1) * a_dim1 + 1], lda,
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&w[i__ + (iw + 1) * w_dim1], ldw, &c_b6, &a[i__ * a_dim1 + 1], &c__1,
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(ftnlen)12);
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i__2 = *n - i__;
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dgemv_((char *)"No transpose", &i__, &i__2, &c_b5, &w[(iw + 1) * w_dim1 + 1], ldw,
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&a[i__ + (i__ + 1) * a_dim1], lda, &c_b6, &a[i__ * a_dim1 + 1], &c__1,
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(ftnlen)12);
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}
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if (i__ > 1) {
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i__2 = i__ - 1;
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dlarfg_(&i__2, &a[i__ - 1 + i__ * a_dim1], &a[i__ * a_dim1 + 1], &c__1,
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&tau[i__ - 1]);
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e[i__ - 1] = a[i__ - 1 + i__ * a_dim1];
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a[i__ - 1 + i__ * a_dim1] = 1.;
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i__2 = i__ - 1;
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dsymv_((char *)"Upper", &i__2, &c_b6, &a[a_offset], lda, &a[i__ * a_dim1 + 1], &c__1,
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&c_b16, &w[iw * w_dim1 + 1], &c__1, (ftnlen)5);
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if (i__ < *n) {
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i__2 = i__ - 1;
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i__3 = *n - i__;
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dgemv_((char *)"Transpose", &i__2, &i__3, &c_b6, &w[(iw + 1) * w_dim1 + 1], ldw,
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&a[i__ * a_dim1 + 1], &c__1, &c_b16, &w[i__ + 1 + iw * w_dim1], &c__1,
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(ftnlen)9);
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i__2 = i__ - 1;
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i__3 = *n - i__;
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dgemv_((char *)"No transpose", &i__2, &i__3, &c_b5, &a[(i__ + 1) * a_dim1 + 1], lda,
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&w[i__ + 1 + iw * w_dim1], &c__1, &c_b6, &w[iw * w_dim1 + 1], &c__1,
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(ftnlen)12);
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i__2 = i__ - 1;
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i__3 = *n - i__;
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dgemv_((char *)"Transpose", &i__2, &i__3, &c_b6, &a[(i__ + 1) * a_dim1 + 1], lda,
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&a[i__ * a_dim1 + 1], &c__1, &c_b16, &w[i__ + 1 + iw * w_dim1], &c__1,
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(ftnlen)9);
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i__2 = i__ - 1;
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i__3 = *n - i__;
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dgemv_((char *)"No transpose", &i__2, &i__3, &c_b5, &w[(iw + 1) * w_dim1 + 1], ldw,
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&w[i__ + 1 + iw * w_dim1], &c__1, &c_b6, &w[iw * w_dim1 + 1], &c__1,
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(ftnlen)12);
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}
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i__2 = i__ - 1;
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dscal_(&i__2, &tau[i__ - 1], &w[iw * w_dim1 + 1], &c__1);
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i__2 = i__ - 1;
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alpha = tau[i__ - 1] * -.5 *
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ddot_(&i__2, &w[iw * w_dim1 + 1], &c__1, &a[i__ * a_dim1 + 1], &c__1);
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i__2 = i__ - 1;
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daxpy_(&i__2, &alpha, &a[i__ * a_dim1 + 1], &c__1, &w[iw * w_dim1 + 1], &c__1);
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}
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}
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} else {
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i__1 = *nb;
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for (i__ = 1; i__ <= i__1; ++i__) {
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i__2 = *n - i__ + 1;
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i__3 = i__ - 1;
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dgemv_((char *)"No transpose", &i__2, &i__3, &c_b5, &a[i__ + a_dim1], lda, &w[i__ + w_dim1],
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ldw, &c_b6, &a[i__ + i__ * a_dim1], &c__1, (ftnlen)12);
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i__2 = *n - i__ + 1;
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i__3 = i__ - 1;
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dgemv_((char *)"No transpose", &i__2, &i__3, &c_b5, &w[i__ + w_dim1], ldw, &a[i__ + a_dim1],
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lda, &c_b6, &a[i__ + i__ * a_dim1], &c__1, (ftnlen)12);
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if (i__ < *n) {
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i__2 = *n - i__;
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i__3 = i__ + 2;
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dlarfg_(&i__2, &a[i__ + 1 + i__ * a_dim1], &a[min(i__3, *n) + i__ * a_dim1], &c__1,
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&tau[i__]);
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e[i__] = a[i__ + 1 + i__ * a_dim1];
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a[i__ + 1 + i__ * a_dim1] = 1.;
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i__2 = *n - i__;
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dsymv_((char *)"Lower", &i__2, &c_b6, &a[i__ + 1 + (i__ + 1) * a_dim1], lda,
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&a[i__ + 1 + i__ * a_dim1], &c__1, &c_b16, &w[i__ + 1 + i__ * w_dim1], &c__1,
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(ftnlen)5);
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i__2 = *n - i__;
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i__3 = i__ - 1;
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dgemv_((char *)"Transpose", &i__2, &i__3, &c_b6, &w[i__ + 1 + w_dim1], ldw,
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&a[i__ + 1 + i__ * a_dim1], &c__1, &c_b16, &w[i__ * w_dim1 + 1], &c__1,
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(ftnlen)9);
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i__2 = *n - i__;
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i__3 = i__ - 1;
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dgemv_((char *)"No transpose", &i__2, &i__3, &c_b5, &a[i__ + 1 + a_dim1], lda,
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&w[i__ * w_dim1 + 1], &c__1, &c_b6, &w[i__ + 1 + i__ * w_dim1], &c__1,
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(ftnlen)12);
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i__2 = *n - i__;
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i__3 = i__ - 1;
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dgemv_((char *)"Transpose", &i__2, &i__3, &c_b6, &a[i__ + 1 + a_dim1], lda,
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&a[i__ + 1 + i__ * a_dim1], &c__1, &c_b16, &w[i__ * w_dim1 + 1], &c__1,
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(ftnlen)9);
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i__2 = *n - i__;
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i__3 = i__ - 1;
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dgemv_((char *)"No transpose", &i__2, &i__3, &c_b5, &w[i__ + 1 + w_dim1], ldw,
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&w[i__ * w_dim1 + 1], &c__1, &c_b6, &w[i__ + 1 + i__ * w_dim1], &c__1,
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(ftnlen)12);
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i__2 = *n - i__;
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dscal_(&i__2, &tau[i__], &w[i__ + 1 + i__ * w_dim1], &c__1);
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i__2 = *n - i__;
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alpha = tau[i__] * -.5 *
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ddot_(&i__2, &w[i__ + 1 + i__ * w_dim1], &c__1, &a[i__ + 1 + i__ * a_dim1],
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&c__1);
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i__2 = *n - i__;
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daxpy_(&i__2, &alpha, &a[i__ + 1 + i__ * a_dim1], &c__1, &w[i__ + 1 + i__ * w_dim1],
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&c__1);
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}
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}
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}
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return 0;
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}
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#ifdef __cplusplus
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}
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#endif
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