158 lines
6.5 KiB
C++
158 lines
6.5 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 integer c__1 = 1;
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static doublereal c_b7 = 1.;
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int dlarft_(char *direct, char *storev, integer *n, integer *k, doublereal *v, integer *ldv,
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doublereal *tau, doublereal *t, integer *ldt, ftnlen direct_len, ftnlen storev_len)
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{
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integer t_dim1, t_offset, v_dim1, v_offset, i__1, i__2, i__3;
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doublereal d__1;
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integer i__, j, prevlastv;
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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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integer lastv;
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extern int dtrmv_(char *, char *, char *, integer *, doublereal *, integer *, doublereal *,
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integer *, ftnlen, ftnlen, ftnlen);
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v_dim1 = *ldv;
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v_offset = 1 + v_dim1;
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v -= v_offset;
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--tau;
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t_dim1 = *ldt;
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t_offset = 1 + t_dim1;
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t -= t_offset;
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if (*n == 0) {
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return 0;
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}
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if (lsame_(direct, (char *)"F", (ftnlen)1, (ftnlen)1)) {
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prevlastv = *n;
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i__1 = *k;
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for (i__ = 1; i__ <= i__1; ++i__) {
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prevlastv = max(i__, prevlastv);
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if (tau[i__] == 0.) {
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i__2 = i__;
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for (j = 1; j <= i__2; ++j) {
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t[j + i__ * t_dim1] = 0.;
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}
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} else {
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if (lsame_(storev, (char *)"C", (ftnlen)1, (ftnlen)1)) {
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i__2 = i__ + 1;
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for (lastv = *n; lastv >= i__2; --lastv) {
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if (v[lastv + i__ * v_dim1] != 0.) {
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goto L219;
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}
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}
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L219:
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i__2 = i__ - 1;
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for (j = 1; j <= i__2; ++j) {
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t[j + i__ * t_dim1] = -tau[i__] * v[i__ + j * v_dim1];
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}
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j = min(lastv, prevlastv);
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i__2 = j - i__;
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i__3 = i__ - 1;
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d__1 = -tau[i__];
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dgemv_((char *)"Transpose", &i__2, &i__3, &d__1, &v[i__ + 1 + v_dim1], ldv,
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&v[i__ + 1 + i__ * v_dim1], &c__1, &c_b7, &t[i__ * t_dim1 + 1], &c__1,
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(ftnlen)9);
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} else {
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i__2 = i__ + 1;
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for (lastv = *n; lastv >= i__2; --lastv) {
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if (v[i__ + lastv * v_dim1] != 0.) {
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goto L235;
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}
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}
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L235:
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i__2 = i__ - 1;
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for (j = 1; j <= i__2; ++j) {
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t[j + i__ * t_dim1] = -tau[i__] * v[j + i__ * v_dim1];
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}
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j = min(lastv, prevlastv);
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i__2 = i__ - 1;
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i__3 = j - i__;
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d__1 = -tau[i__];
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dgemv_((char *)"No transpose", &i__2, &i__3, &d__1, &v[(i__ + 1) * v_dim1 + 1], ldv,
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&v[i__ + (i__ + 1) * v_dim1], ldv, &c_b7, &t[i__ * t_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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dtrmv_((char *)"Upper", (char *)"No transpose", (char *)"Non-unit", &i__2, &t[t_offset], ldt,
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&t[i__ * t_dim1 + 1], &c__1, (ftnlen)5, (ftnlen)12, (ftnlen)8);
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t[i__ + i__ * t_dim1] = tau[i__];
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if (i__ > 1) {
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prevlastv = max(prevlastv, lastv);
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} else {
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prevlastv = lastv;
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}
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}
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}
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} else {
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prevlastv = 1;
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for (i__ = *k; i__ >= 1; --i__) {
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if (tau[i__] == 0.) {
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i__1 = *k;
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for (j = i__; j <= i__1; ++j) {
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t[j + i__ * t_dim1] = 0.;
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}
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} else {
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if (i__ < *k) {
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if (lsame_(storev, (char *)"C", (ftnlen)1, (ftnlen)1)) {
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i__1 = i__ - 1;
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for (lastv = 1; lastv <= i__1; ++lastv) {
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if (v[lastv + i__ * v_dim1] != 0.) {
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goto L280;
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}
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}
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L280:
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i__1 = *k;
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for (j = i__ + 1; j <= i__1; ++j) {
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t[j + i__ * t_dim1] = -tau[i__] * v[*n - *k + i__ + j * v_dim1];
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}
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j = max(lastv, prevlastv);
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i__1 = *n - *k + i__ - j;
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i__2 = *k - i__;
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d__1 = -tau[i__];
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dgemv_((char *)"Transpose", &i__1, &i__2, &d__1, &v[j + (i__ + 1) * v_dim1], ldv,
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&v[j + i__ * v_dim1], &c__1, &c_b7, &t[i__ + 1 + i__ * t_dim1],
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&c__1, (ftnlen)9);
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} else {
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i__1 = i__ - 1;
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for (lastv = 1; lastv <= i__1; ++lastv) {
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if (v[i__ + lastv * v_dim1] != 0.) {
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goto L296;
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}
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}
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L296:
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i__1 = *k;
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for (j = i__ + 1; j <= i__1; ++j) {
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t[j + i__ * t_dim1] = -tau[i__] * v[j + (*n - *k + i__) * v_dim1];
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}
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j = max(lastv, prevlastv);
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i__1 = *k - i__;
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i__2 = *n - *k + i__ - j;
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d__1 = -tau[i__];
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dgemv_((char *)"No transpose", &i__1, &i__2, &d__1, &v[i__ + 1 + j * v_dim1], ldv,
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&v[i__ + j * v_dim1], ldv, &c_b7, &t[i__ + 1 + i__ * t_dim1], &c__1,
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(ftnlen)12);
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}
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i__1 = *k - i__;
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dtrmv_((char *)"Lower", (char *)"No transpose", (char *)"Non-unit", &i__1,
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&t[i__ + 1 + (i__ + 1) * t_dim1], ldt, &t[i__ + 1 + i__ * t_dim1], &c__1,
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(ftnlen)5, (ftnlen)12, (ftnlen)8);
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if (i__ > 1) {
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prevlastv = min(prevlastv, lastv);
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} else {
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prevlastv = lastv;
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}
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}
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t[i__ + i__ * t_dim1] = tau[i__];
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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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