70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
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/* -- 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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/* Subroutine */ int cscal_(integer *n, complex *ca, complex *cx, integer *
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incx)
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{
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/* System generated locals */
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integer i__1, i__2, i__3, i__4;
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complex q__1;
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/* Local variables */
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static integer i, nincx;
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/* scales a vector by a constant.
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jack dongarra, linpack, 3/11/78.
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modified 3/93 to return if incx .le. 0.
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modified 12/3/93, array(1) declarations changed to array(*)
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Parameter adjustments
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Function Body */
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#define CX(I) cx[(I)-1]
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if (*n <= 0 || *incx <= 0) {
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return 0;
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}
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if (*incx == 1) {
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goto L20;
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}
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/* code for increment not equal to 1 */
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nincx = *n * *incx;
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i__1 = nincx;
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i__2 = *incx;
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for (i = 1; *incx < 0 ? i >= nincx : i <= nincx; i += *incx) {
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i__3 = i;
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i__4 = i;
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q__1.r = ca->r * CX(i).r - ca->i * CX(i).i, q__1.i = ca->r * CX(
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i).i + ca->i * CX(i).r;
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CX(i).r = q__1.r, CX(i).i = q__1.i;
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/* L10: */
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}
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return 0;
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/* code for increment equal to 1 */
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L20:
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i__2 = *n;
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for (i = 1; i <= *n; ++i) {
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i__1 = i;
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i__3 = i;
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q__1.r = ca->r * CX(i).r - ca->i * CX(i).i, q__1.i = ca->r * CX(
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i).i + ca->i * CX(i).r;
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CX(i).r = q__1.r, CX(i).i = q__1.i;
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/* L30: */
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}
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return 0;
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} /* cscal_ */
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