71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
#include "lmp_f2c.h"
|
|
int zdrot_(integer *n, doublecomplex *zx, integer *incx, doublecomplex *zy, integer *incy,
|
|
doublereal *c__, doublereal *s)
|
|
{
|
|
integer i__1, i__2, i__3, i__4;
|
|
doublecomplex z__1, z__2, z__3;
|
|
integer i__, ix, iy;
|
|
doublecomplex ctemp;
|
|
--zy;
|
|
--zx;
|
|
if (*n <= 0) {
|
|
return 0;
|
|
}
|
|
if (*incx == 1 && *incy == 1) {
|
|
i__1 = *n;
|
|
for (i__ = 1; i__ <= i__1; ++i__) {
|
|
i__2 = i__;
|
|
z__2.r = *c__ * zx[i__2].r, z__2.i = *c__ * zx[i__2].i;
|
|
i__3 = i__;
|
|
z__3.r = *s * zy[i__3].r, z__3.i = *s * zy[i__3].i;
|
|
z__1.r = z__2.r + z__3.r, z__1.i = z__2.i + z__3.i;
|
|
ctemp.r = z__1.r, ctemp.i = z__1.i;
|
|
i__2 = i__;
|
|
i__3 = i__;
|
|
z__2.r = *c__ * zy[i__3].r, z__2.i = *c__ * zy[i__3].i;
|
|
i__4 = i__;
|
|
z__3.r = *s * zx[i__4].r, z__3.i = *s * zx[i__4].i;
|
|
z__1.r = z__2.r - z__3.r, z__1.i = z__2.i - z__3.i;
|
|
zy[i__2].r = z__1.r, zy[i__2].i = z__1.i;
|
|
i__2 = i__;
|
|
zx[i__2].r = ctemp.r, zx[i__2].i = ctemp.i;
|
|
}
|
|
} else {
|
|
ix = 1;
|
|
iy = 1;
|
|
if (*incx < 0) {
|
|
ix = (-(*n) + 1) * *incx + 1;
|
|
}
|
|
if (*incy < 0) {
|
|
iy = (-(*n) + 1) * *incy + 1;
|
|
}
|
|
i__1 = *n;
|
|
for (i__ = 1; i__ <= i__1; ++i__) {
|
|
i__2 = ix;
|
|
z__2.r = *c__ * zx[i__2].r, z__2.i = *c__ * zx[i__2].i;
|
|
i__3 = iy;
|
|
z__3.r = *s * zy[i__3].r, z__3.i = *s * zy[i__3].i;
|
|
z__1.r = z__2.r + z__3.r, z__1.i = z__2.i + z__3.i;
|
|
ctemp.r = z__1.r, ctemp.i = z__1.i;
|
|
i__2 = iy;
|
|
i__3 = iy;
|
|
z__2.r = *c__ * zy[i__3].r, z__2.i = *c__ * zy[i__3].i;
|
|
i__4 = ix;
|
|
z__3.r = *s * zx[i__4].r, z__3.i = *s * zx[i__4].i;
|
|
z__1.r = z__2.r - z__3.r, z__1.i = z__2.i - z__3.i;
|
|
zy[i__2].r = z__1.r, zy[i__2].i = z__1.i;
|
|
i__2 = ix;
|
|
zx[i__2].r = ctemp.r, zx[i__2].i = ctemp.i;
|
|
ix += *incx;
|
|
iy += *incy;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|