228 lines
8.2 KiB
C++
228 lines
8.2 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 zgemv_(char *trans, integer *m, integer *n, doublecomplex *alpha, doublecomplex *a,
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integer *lda, doublecomplex *x, integer *incx, doublecomplex *beta, doublecomplex *y,
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integer *incy, ftnlen trans_len)
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{
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integer a_dim1, a_offset, i__1, i__2, i__3, i__4, i__5;
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doublecomplex z__1, z__2, z__3;
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void d_lmp_cnjg(doublecomplex *, doublecomplex *);
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integer i__, j, ix, iy, jx, jy, kx, ky, info;
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doublecomplex temp;
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integer lenx, leny;
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extern logical lsame_(char *, char *, ftnlen, ftnlen);
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extern int xerbla_(char *, integer *, ftnlen);
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logical noconj;
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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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--x;
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--y;
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info = 0;
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if (!lsame_(trans, (char *)"N", (ftnlen)1, (ftnlen)1) && !lsame_(trans, (char *)"T", (ftnlen)1, (ftnlen)1) &&
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!lsame_(trans, (char *)"C", (ftnlen)1, (ftnlen)1)) {
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info = 1;
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} else if (*m < 0) {
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info = 2;
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} else if (*n < 0) {
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info = 3;
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} else if (*lda < max(1, *m)) {
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info = 6;
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} else if (*incx == 0) {
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info = 8;
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} else if (*incy == 0) {
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info = 11;
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}
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if (info != 0) {
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xerbla_((char *)"ZGEMV ", &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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alpha->r == 0. && alpha->i == 0. && (beta->r == 1. && beta->i == 0.)) {
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return 0;
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}
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noconj = lsame_(trans, (char *)"T", (ftnlen)1, (ftnlen)1);
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if (lsame_(trans, (char *)"N", (ftnlen)1, (ftnlen)1)) {
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lenx = *n;
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leny = *m;
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} else {
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lenx = *m;
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leny = *n;
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}
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if (*incx > 0) {
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kx = 1;
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} else {
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kx = 1 - (lenx - 1) * *incx;
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}
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if (*incy > 0) {
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ky = 1;
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} else {
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ky = 1 - (leny - 1) * *incy;
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}
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if (beta->r != 1. || beta->i != 0.) {
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if (*incy == 1) {
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if (beta->r == 0. && beta->i == 0.) {
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i__1 = leny;
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for (i__ = 1; i__ <= i__1; ++i__) {
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i__2 = i__;
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y[i__2].r = 0., y[i__2].i = 0.;
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}
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} else {
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i__1 = leny;
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for (i__ = 1; i__ <= i__1; ++i__) {
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i__2 = i__;
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i__3 = i__;
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z__1.r = beta->r * y[i__3].r - beta->i * y[i__3].i,
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z__1.i = beta->r * y[i__3].i + beta->i * y[i__3].r;
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y[i__2].r = z__1.r, y[i__2].i = z__1.i;
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}
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}
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} else {
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iy = ky;
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if (beta->r == 0. && beta->i == 0.) {
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i__1 = leny;
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for (i__ = 1; i__ <= i__1; ++i__) {
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i__2 = iy;
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y[i__2].r = 0., y[i__2].i = 0.;
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iy += *incy;
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}
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} else {
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i__1 = leny;
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for (i__ = 1; i__ <= i__1; ++i__) {
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i__2 = iy;
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i__3 = iy;
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z__1.r = beta->r * y[i__3].r - beta->i * y[i__3].i,
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z__1.i = beta->r * y[i__3].i + beta->i * y[i__3].r;
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y[i__2].r = z__1.r, y[i__2].i = z__1.i;
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iy += *incy;
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}
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}
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}
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}
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if (alpha->r == 0. && alpha->i == 0.) {
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return 0;
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}
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if (lsame_(trans, (char *)"N", (ftnlen)1, (ftnlen)1)) {
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jx = kx;
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if (*incy == 1) {
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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i__2 = jx;
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z__1.r = alpha->r * x[i__2].r - alpha->i * x[i__2].i,
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z__1.i = alpha->r * x[i__2].i + alpha->i * x[i__2].r;
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temp.r = z__1.r, temp.i = z__1.i;
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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i__3 = i__;
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i__4 = i__;
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i__5 = i__ + j * a_dim1;
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z__2.r = temp.r * a[i__5].r - temp.i * a[i__5].i,
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z__2.i = temp.r * a[i__5].i + temp.i * a[i__5].r;
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z__1.r = y[i__4].r + z__2.r, z__1.i = y[i__4].i + z__2.i;
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y[i__3].r = z__1.r, y[i__3].i = z__1.i;
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}
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jx += *incx;
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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 = jx;
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z__1.r = alpha->r * x[i__2].r - alpha->i * x[i__2].i,
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z__1.i = alpha->r * x[i__2].i + alpha->i * x[i__2].r;
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temp.r = z__1.r, temp.i = z__1.i;
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iy = ky;
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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i__3 = iy;
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i__4 = iy;
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i__5 = i__ + j * a_dim1;
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z__2.r = temp.r * a[i__5].r - temp.i * a[i__5].i,
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z__2.i = temp.r * a[i__5].i + temp.i * a[i__5].r;
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z__1.r = y[i__4].r + z__2.r, z__1.i = y[i__4].i + z__2.i;
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y[i__3].r = z__1.r, y[i__3].i = z__1.i;
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iy += *incy;
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}
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jx += *incx;
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}
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}
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} else {
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jy = ky;
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if (*incx == 1) {
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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temp.r = 0., temp.i = 0.;
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if (noconj) {
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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i__3 = i__ + j * a_dim1;
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i__4 = i__;
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z__2.r = a[i__3].r * x[i__4].r - a[i__3].i * x[i__4].i,
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z__2.i = a[i__3].r * x[i__4].i + a[i__3].i * x[i__4].r;
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z__1.r = temp.r + z__2.r, z__1.i = temp.i + z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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}
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} else {
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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d_lmp_cnjg(&z__3, &a[i__ + j * a_dim1]);
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i__3 = i__;
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z__2.r = z__3.r * x[i__3].r - z__3.i * x[i__3].i,
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z__2.i = z__3.r * x[i__3].i + z__3.i * x[i__3].r;
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z__1.r = temp.r + z__2.r, z__1.i = temp.i + z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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}
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}
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i__2 = jy;
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i__3 = jy;
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z__2.r = alpha->r * temp.r - alpha->i * temp.i,
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z__2.i = alpha->r * temp.i + alpha->i * temp.r;
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z__1.r = y[i__3].r + z__2.r, z__1.i = y[i__3].i + z__2.i;
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y[i__2].r = z__1.r, y[i__2].i = z__1.i;
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jy += *incy;
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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.r = 0., temp.i = 0.;
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ix = kx;
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if (noconj) {
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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i__3 = i__ + j * a_dim1;
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i__4 = ix;
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z__2.r = a[i__3].r * x[i__4].r - a[i__3].i * x[i__4].i,
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z__2.i = a[i__3].r * x[i__4].i + a[i__3].i * x[i__4].r;
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z__1.r = temp.r + z__2.r, z__1.i = temp.i + z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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ix += *incx;
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}
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} else {
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i__2 = *m;
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for (i__ = 1; i__ <= i__2; ++i__) {
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d_lmp_cnjg(&z__3, &a[i__ + j * a_dim1]);
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i__3 = ix;
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z__2.r = z__3.r * x[i__3].r - z__3.i * x[i__3].i,
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z__2.i = z__3.r * x[i__3].i + z__3.i * x[i__3].r;
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z__1.r = temp.r + z__2.r, z__1.i = temp.i + z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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ix += *incx;
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}
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}
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i__2 = jy;
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i__3 = jy;
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z__2.r = alpha->r * temp.r - alpha->i * temp.i,
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z__2.i = alpha->r * temp.i + alpha->i * temp.r;
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z__1.r = y[i__3].r + z__2.r, z__1.i = y[i__3].i + z__2.i;
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y[i__2].r = z__1.r, y[i__2].i = z__1.i;
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jy += *incy;
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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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