244 lines
8.8 KiB
C++
244 lines
8.8 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 dtrmm_(char *side, char *uplo, char *transa, char *diag, integer *m, integer *n,
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doublereal *alpha, doublereal *a, integer *lda, doublereal *b, integer *ldb,
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ftnlen side_len, ftnlen uplo_len, ftnlen transa_len, ftnlen diag_len)
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{
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integer a_dim1, a_offset, b_dim1, b_offset, i__1, i__2, i__3;
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integer i__, j, k, info;
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doublereal temp;
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logical lside;
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extern logical lsame_(char *, char *, ftnlen, ftnlen);
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integer nrowa;
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logical upper;
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extern int xerbla_(char *, integer *, ftnlen);
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logical nounit;
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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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b_dim1 = *ldb;
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b_offset = 1 + b_dim1;
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b -= b_offset;
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lside = lsame_(side, (char *)"L", (ftnlen)1, (ftnlen)1);
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if (lside) {
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nrowa = *m;
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} else {
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nrowa = *n;
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}
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nounit = lsame_(diag, (char *)"N", (ftnlen)1, (ftnlen)1);
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upper = lsame_(uplo, (char *)"U", (ftnlen)1, (ftnlen)1);
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info = 0;
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if (!lside && !lsame_(side, (char *)"R", (ftnlen)1, (ftnlen)1)) {
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info = 1;
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} else if (!upper && !lsame_(uplo, (char *)"L", (ftnlen)1, (ftnlen)1)) {
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info = 2;
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} else if (!lsame_(transa, (char *)"N", (ftnlen)1, (ftnlen)1) &&
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!lsame_(transa, (char *)"T", (ftnlen)1, (ftnlen)1) &&
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!lsame_(transa, (char *)"C", (ftnlen)1, (ftnlen)1)) {
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info = 3;
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} else if (!lsame_(diag, (char *)"U", (ftnlen)1, (ftnlen)1) &&
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!lsame_(diag, (char *)"N", (ftnlen)1, (ftnlen)1)) {
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info = 4;
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} else if (*m < 0) {
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info = 5;
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} else if (*n < 0) {
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info = 6;
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} else if (*lda < max(1, nrowa)) {
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info = 9;
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} else if (*ldb < max(1, *m)) {
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info = 11;
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}
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if (info != 0) {
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xerbla_((char *)"DTRMM ", &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 (*alpha == 0.) {
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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b[i__ + j * b_dim1] = 0.;
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}
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}
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return 0;
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}
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if (lside) {
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if (lsame_(transa, (char *)"N", (ftnlen)1, (ftnlen)1)) {
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if (upper) {
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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i__2 = *m;
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for (k = 1; k <= i__2; ++k) {
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if (b[k + j * b_dim1] != 0.) {
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temp = *alpha * b[k + j * b_dim1];
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i__3 = k - 1;
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for (i__ = 1; i__ <= i__3; ++i__) {
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b[i__ + j * b_dim1] += temp * a[i__ + k * a_dim1];
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}
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if (nounit) {
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temp *= a[k + k * a_dim1];
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}
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b[k + j * b_dim1] = temp;
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}
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}
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}
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} else {
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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for (k = *m; k >= 1; --k) {
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if (b[k + j * b_dim1] != 0.) {
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temp = *alpha * b[k + j * b_dim1];
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b[k + j * b_dim1] = temp;
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if (nounit) {
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b[k + j * b_dim1] *= a[k + k * a_dim1];
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}
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i__2 = *m;
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for (i__ = k + 1; i__ <= i__2; ++i__) {
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b[i__ + j * b_dim1] += temp * a[i__ + k * a_dim1];
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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 {
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if (upper) {
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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for (i__ = *m; i__ >= 1; --i__) {
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temp = b[i__ + j * b_dim1];
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if (nounit) {
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temp *= a[i__ + i__ * a_dim1];
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}
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i__2 = i__ - 1;
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for (k = 1; k <= i__2; ++k) {
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temp += a[k + i__ * a_dim1] * b[k + j * b_dim1];
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}
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b[i__ + j * b_dim1] = *alpha * temp;
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}
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}
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} else {
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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temp = b[i__ + j * b_dim1];
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if (nounit) {
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temp *= a[i__ + i__ * a_dim1];
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}
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i__3 = *m;
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for (k = i__ + 1; k <= i__3; ++k) {
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temp += a[k + i__ * a_dim1] * b[k + j * b_dim1];
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}
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b[i__ + j * b_dim1] = *alpha * temp;
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}
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}
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}
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}
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} else {
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if (lsame_(transa, (char *)"N", (ftnlen)1, (ftnlen)1)) {
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if (upper) {
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for (j = *n; j >= 1; --j) {
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temp = *alpha;
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if (nounit) {
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temp *= a[j + j * a_dim1];
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}
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i__1 = *m;
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for (i__ = 1; i__ <= i__1; ++i__) {
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b[i__ + j * b_dim1] = temp * b[i__ + j * b_dim1];
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}
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i__1 = j - 1;
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for (k = 1; k <= i__1; ++k) {
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if (a[k + j * a_dim1] != 0.) {
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temp = *alpha * a[k + j * a_dim1];
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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b[i__ + j * b_dim1] += temp * b[i__ + k * b_dim1];
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}
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}
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}
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}
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} else {
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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temp = *alpha;
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if (nounit) {
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temp *= a[j + j * a_dim1];
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}
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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b[i__ + j * b_dim1] = temp * b[i__ + j * b_dim1];
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}
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i__2 = *n;
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for (k = j + 1; k <= i__2; ++k) {
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if (a[k + j * a_dim1] != 0.) {
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temp = *alpha * a[k + j * a_dim1];
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i__3 = *m;
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for (i__ = 1; i__ <= i__3; ++i__) {
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b[i__ + j * b_dim1] += temp * b[i__ + k * b_dim1];
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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 {
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if (upper) {
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i__1 = *n;
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for (k = 1; k <= i__1; ++k) {
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i__2 = k - 1;
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for (j = 1; j <= i__2; ++j) {
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if (a[j + k * a_dim1] != 0.) {
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temp = *alpha * a[j + k * a_dim1];
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i__3 = *m;
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for (i__ = 1; i__ <= i__3; ++i__) {
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b[i__ + j * b_dim1] += temp * b[i__ + k * b_dim1];
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}
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}
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}
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temp = *alpha;
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if (nounit) {
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temp *= a[k + k * a_dim1];
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}
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if (temp != 1.) {
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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b[i__ + k * b_dim1] = temp * b[i__ + k * b_dim1];
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}
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}
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}
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} else {
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for (k = *n; k >= 1; --k) {
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i__1 = *n;
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for (j = k + 1; j <= i__1; ++j) {
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if (a[j + k * a_dim1] != 0.) {
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temp = *alpha * a[j + k * a_dim1];
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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b[i__ + j * b_dim1] += temp * b[i__ + k * b_dim1];
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}
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}
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}
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temp = *alpha;
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if (nounit) {
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temp *= a[k + k * a_dim1];
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}
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if (temp != 1.) {
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i__1 = *m;
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for (i__ = 1; i__ <= i__1; ++i__) {
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b[i__ + k * b_dim1] = temp * b[i__ + k * b_dim1];
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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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