228 lines
9.9 KiB
C++
228 lines
9.9 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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int dlasr_(char *side, char *pivot, char *direct, integer *m, integer *n, doublereal *c__,
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doublereal *s, doublereal *a, integer *lda, ftnlen side_len, ftnlen pivot_len,
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ftnlen direct_len)
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{
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integer a_dim1, a_offset, i__1, i__2;
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integer i__, j, info;
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doublereal temp;
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extern logical lsame_(char *, char *, ftnlen, ftnlen);
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doublereal ctemp, stemp;
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extern int xerbla_(char *, integer *, ftnlen);
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--c__;
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--s;
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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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info = 0;
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if (!(lsame_(side, (char *)"L", (ftnlen)1, (ftnlen)1) || lsame_(side, (char *)"R", (ftnlen)1, (ftnlen)1))) {
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info = 1;
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} else if (!(lsame_(pivot, (char *)"V", (ftnlen)1, (ftnlen)1) ||
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lsame_(pivot, (char *)"T", (ftnlen)1, (ftnlen)1) ||
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lsame_(pivot, (char *)"B", (ftnlen)1, (ftnlen)1))) {
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info = 2;
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} else if (!(lsame_(direct, (char *)"F", (ftnlen)1, (ftnlen)1) ||
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lsame_(direct, (char *)"B", (ftnlen)1, (ftnlen)1))) {
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info = 3;
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} else if (*m < 0) {
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info = 4;
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} else if (*n < 0) {
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info = 5;
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} else if (*lda < max(1, *m)) {
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info = 9;
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}
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if (info != 0) {
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xerbla_((char *)"DLASR ", &info, (ftnlen)6);
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return 0;
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}
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if (*m == 0 || *n == 0) {
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return 0;
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}
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if (lsame_(side, (char *)"L", (ftnlen)1, (ftnlen)1)) {
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if (lsame_(pivot, (char *)"V", (ftnlen)1, (ftnlen)1)) {
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if (lsame_(direct, (char *)"F", (ftnlen)1, (ftnlen)1)) {
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i__1 = *m - 1;
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for (j = 1; j <= i__1; ++j) {
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ctemp = c__[j];
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stemp = s[j];
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if (ctemp != 1. || stemp != 0.) {
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i__2 = *n;
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for (i__ = 1; i__ <= i__2; ++i__) {
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temp = a[j + 1 + i__ * a_dim1];
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a[j + 1 + i__ * a_dim1] = ctemp * temp - stemp * a[j + i__ * a_dim1];
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a[j + i__ * a_dim1] = stemp * temp + ctemp * a[j + i__ * a_dim1];
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}
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}
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}
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} else if (lsame_(direct, (char *)"B", (ftnlen)1, (ftnlen)1)) {
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for (j = *m - 1; j >= 1; --j) {
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ctemp = c__[j];
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stemp = s[j];
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if (ctemp != 1. || stemp != 0.) {
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i__1 = *n;
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for (i__ = 1; i__ <= i__1; ++i__) {
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temp = a[j + 1 + i__ * a_dim1];
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a[j + 1 + i__ * a_dim1] = ctemp * temp - stemp * a[j + i__ * a_dim1];
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a[j + i__ * a_dim1] = stemp * temp + ctemp * a[j + i__ * a_dim1];
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}
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}
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}
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}
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} else if (lsame_(pivot, (char *)"T", (ftnlen)1, (ftnlen)1)) {
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if (lsame_(direct, (char *)"F", (ftnlen)1, (ftnlen)1)) {
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i__1 = *m;
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for (j = 2; j <= i__1; ++j) {
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ctemp = c__[j - 1];
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stemp = s[j - 1];
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if (ctemp != 1. || stemp != 0.) {
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i__2 = *n;
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for (i__ = 1; i__ <= i__2; ++i__) {
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temp = a[j + i__ * a_dim1];
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a[j + i__ * a_dim1] = ctemp * temp - stemp * a[i__ * a_dim1 + 1];
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a[i__ * a_dim1 + 1] = stemp * temp + ctemp * a[i__ * a_dim1 + 1];
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}
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}
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}
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} else if (lsame_(direct, (char *)"B", (ftnlen)1, (ftnlen)1)) {
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for (j = *m; j >= 2; --j) {
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ctemp = c__[j - 1];
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stemp = s[j - 1];
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if (ctemp != 1. || stemp != 0.) {
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i__1 = *n;
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for (i__ = 1; i__ <= i__1; ++i__) {
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temp = a[j + i__ * a_dim1];
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a[j + i__ * a_dim1] = ctemp * temp - stemp * a[i__ * a_dim1 + 1];
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a[i__ * a_dim1 + 1] = stemp * temp + ctemp * a[i__ * a_dim1 + 1];
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}
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}
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}
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}
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} else if (lsame_(pivot, (char *)"B", (ftnlen)1, (ftnlen)1)) {
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if (lsame_(direct, (char *)"F", (ftnlen)1, (ftnlen)1)) {
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i__1 = *m - 1;
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for (j = 1; j <= i__1; ++j) {
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ctemp = c__[j];
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stemp = s[j];
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if (ctemp != 1. || stemp != 0.) {
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i__2 = *n;
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for (i__ = 1; i__ <= i__2; ++i__) {
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temp = a[j + i__ * a_dim1];
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a[j + i__ * a_dim1] = stemp * a[*m + i__ * a_dim1] + ctemp * temp;
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a[*m + i__ * a_dim1] = ctemp * a[*m + i__ * a_dim1] - stemp * temp;
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}
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}
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}
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} else if (lsame_(direct, (char *)"B", (ftnlen)1, (ftnlen)1)) {
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for (j = *m - 1; j >= 1; --j) {
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ctemp = c__[j];
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stemp = s[j];
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if (ctemp != 1. || stemp != 0.) {
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i__1 = *n;
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for (i__ = 1; i__ <= i__1; ++i__) {
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temp = a[j + i__ * a_dim1];
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a[j + i__ * a_dim1] = stemp * a[*m + i__ * a_dim1] + ctemp * temp;
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a[*m + i__ * a_dim1] = ctemp * a[*m + i__ * a_dim1] - stemp * temp;
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}
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}
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}
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}
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}
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} else if (lsame_(side, (char *)"R", (ftnlen)1, (ftnlen)1)) {
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if (lsame_(pivot, (char *)"V", (ftnlen)1, (ftnlen)1)) {
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if (lsame_(direct, (char *)"F", (ftnlen)1, (ftnlen)1)) {
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i__1 = *n - 1;
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for (j = 1; j <= i__1; ++j) {
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ctemp = c__[j];
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stemp = s[j];
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if (ctemp != 1. || stemp != 0.) {
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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temp = a[i__ + (j + 1) * a_dim1];
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a[i__ + (j + 1) * a_dim1] = ctemp * temp - stemp * a[i__ + j * a_dim1];
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a[i__ + j * a_dim1] = stemp * temp + ctemp * a[i__ + j * a_dim1];
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}
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}
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}
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} else if (lsame_(direct, (char *)"B", (ftnlen)1, (ftnlen)1)) {
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for (j = *n - 1; j >= 1; --j) {
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ctemp = c__[j];
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stemp = s[j];
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if (ctemp != 1. || stemp != 0.) {
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i__1 = *m;
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for (i__ = 1; i__ <= i__1; ++i__) {
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temp = a[i__ + (j + 1) * a_dim1];
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a[i__ + (j + 1) * a_dim1] = ctemp * temp - stemp * a[i__ + j * a_dim1];
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a[i__ + j * a_dim1] = stemp * temp + ctemp * a[i__ + j * a_dim1];
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}
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}
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}
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}
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} else if (lsame_(pivot, (char *)"T", (ftnlen)1, (ftnlen)1)) {
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if (lsame_(direct, (char *)"F", (ftnlen)1, (ftnlen)1)) {
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i__1 = *n;
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for (j = 2; j <= i__1; ++j) {
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ctemp = c__[j - 1];
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stemp = s[j - 1];
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if (ctemp != 1. || stemp != 0.) {
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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temp = a[i__ + j * a_dim1];
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a[i__ + j * a_dim1] = ctemp * temp - stemp * a[i__ + a_dim1];
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a[i__ + a_dim1] = stemp * temp + ctemp * a[i__ + a_dim1];
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}
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}
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}
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} else if (lsame_(direct, (char *)"B", (ftnlen)1, (ftnlen)1)) {
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for (j = *n; j >= 2; --j) {
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ctemp = c__[j - 1];
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stemp = s[j - 1];
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if (ctemp != 1. || stemp != 0.) {
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i__1 = *m;
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for (i__ = 1; i__ <= i__1; ++i__) {
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temp = a[i__ + j * a_dim1];
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a[i__ + j * a_dim1] = ctemp * temp - stemp * a[i__ + a_dim1];
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a[i__ + a_dim1] = stemp * temp + ctemp * a[i__ + a_dim1];
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}
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}
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}
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}
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} else if (lsame_(pivot, (char *)"B", (ftnlen)1, (ftnlen)1)) {
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if (lsame_(direct, (char *)"F", (ftnlen)1, (ftnlen)1)) {
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i__1 = *n - 1;
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for (j = 1; j <= i__1; ++j) {
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ctemp = c__[j];
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stemp = s[j];
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if (ctemp != 1. || stemp != 0.) {
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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temp = a[i__ + j * a_dim1];
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a[i__ + j * a_dim1] = stemp * a[i__ + *n * a_dim1] + ctemp * temp;
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a[i__ + *n * a_dim1] = ctemp * a[i__ + *n * a_dim1] - stemp * temp;
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}
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}
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}
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} else if (lsame_(direct, (char *)"B", (ftnlen)1, (ftnlen)1)) {
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for (j = *n - 1; j >= 1; --j) {
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ctemp = c__[j];
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stemp = s[j];
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if (ctemp != 1. || stemp != 0.) {
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i__1 = *m;
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for (i__ = 1; i__ <= i__1; ++i__) {
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temp = a[i__ + j * a_dim1];
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a[i__ + j * a_dim1] = stemp * a[i__ + *n * a_dim1] + ctemp * temp;
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a[i__ + *n * a_dim1] = ctemp * a[i__ + *n * a_dim1] - stemp * temp;
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}
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}
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}
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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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