87 lines
2 KiB
C
87 lines
2 KiB
C
/* -- translated by f2c (version 19940927).
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You must link the resulting object file with the libraries:
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-lf2c -lm (in that order)
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*/
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#include "f2c.h"
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/* Complex */ VOID cdotc_(complex * ret_val, integer *n, complex *cx, integer
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*incx, complex *cy, integer *incy)
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{
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/* System generated locals */
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integer i__1, i__2;
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complex q__1, q__2, q__3;
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/* Builtin functions */
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void r_cnjg(complex *, complex *);
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/* Local variables */
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static integer i;
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static complex ctemp;
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static integer ix, iy;
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/* forms the dot product of two vectors, conjugating the first
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vector.
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jack dongarra, linpack, 3/11/78.
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modified 12/3/93, array(1) declarations changed to array(*)
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Parameter adjustments */
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--cy;
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--cx;
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/* Function Body */
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ctemp.r = 0.f, ctemp.i = 0.f;
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ret_val->r = 0.f, ret_val->i = 0.f;
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if (*n <= 0) {
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return ;
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}
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if (*incx == 1 && *incy == 1) {
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goto L20;
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}
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/* code for unequal increments or equal increments
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not equal to 1 */
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ix = 1;
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iy = 1;
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if (*incx < 0) {
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ix = (-(*n) + 1) * *incx + 1;
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}
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if (*incy < 0) {
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iy = (-(*n) + 1) * *incy + 1;
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}
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i__1 = *n;
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for (i = 1; i <= *n; ++i) {
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r_cnjg(&q__3, &cx[ix]);
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i__2 = iy;
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q__2.r = q__3.r * cy[iy].r - q__3.i * cy[iy].i, q__2.i = q__3.r *
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cy[iy].i + q__3.i * cy[iy].r;
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q__1.r = ctemp.r + q__2.r, q__1.i = ctemp.i + q__2.i;
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ctemp.r = q__1.r, ctemp.i = q__1.i;
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ix += *incx;
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iy += *incy;
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/* L10: */
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}
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ret_val->r = ctemp.r, ret_val->i = ctemp.i;
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return ;
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/* code for both increments equal to 1 */
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L20:
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i__1 = *n;
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for (i = 1; i <= *n; ++i) {
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r_cnjg(&q__3, &cx[i]);
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i__2 = i;
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q__2.r = q__3.r * cy[i].r - q__3.i * cy[i].i, q__2.i = q__3.r *
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cy[i].i + q__3.i * cy[i].r;
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q__1.r = ctemp.r + q__2.r, q__1.i = ctemp.i + q__2.i;
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ctemp.r = q__1.r, ctemp.i = q__1.i;
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/* L30: */
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}
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ret_val->r = ctemp.r, ret_val->i = ctemp.i;
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return ;
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} /* cdotc_ */
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