cscal.c
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00001 /* cscal.f -- translated by f2c (version 20061008).
00002    You must link the resulting object file with libf2c:
00003         on Microsoft Windows system, link with libf2c.lib;
00004         on Linux or Unix systems, link with .../path/to/libf2c.a -lm
00005         or, if you install libf2c.a in a standard place, with -lf2c -lm
00006         -- in that order, at the end of the command line, as in
00007                 cc *.o -lf2c -lm
00008         Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,
00009 
00010                 http://www.netlib.org/f2c/libf2c.zip
00011 */
00012 
00013 #include "f2c.h"
00014 #include "blaswrap.h"
00015 
00016 /* Subroutine */ int cscal_(integer *n, complex *ca, complex *cx, integer *
00017         incx)
00018 {
00019     /* System generated locals */
00020     integer i__1, i__2, i__3, i__4;
00021     complex q__1;
00022 
00023     /* Local variables */
00024     integer i__, nincx;
00025 
00026 /*     .. Scalar Arguments .. */
00027 /*     .. */
00028 /*     .. Array Arguments .. */
00029 /*     .. */
00030 
00031 /*  Purpose */
00032 /*  ======= */
00033 
00034 /*     scales a vector by a constant. */
00035 /*     jack dongarra, linpack,  3/11/78. */
00036 /*     modified 3/93 to return if incx .le. 0. */
00037 /*     modified 12/3/93, array(1) declarations changed to array(*) */
00038 
00039 
00040 /*     .. Local Scalars .. */
00041 /*     .. */
00042     /* Parameter adjustments */
00043     --cx;
00044 
00045     /* Function Body */
00046     if (*n <= 0 || *incx <= 0) {
00047         return 0;
00048     }
00049     if (*incx == 1) {
00050         goto L20;
00051     }
00052 
00053 /*        code for increment not equal to 1 */
00054 
00055     nincx = *n * *incx;
00056     i__1 = nincx;
00057     i__2 = *incx;
00058     for (i__ = 1; i__2 < 0 ? i__ >= i__1 : i__ <= i__1; i__ += i__2) {
00059         i__3 = i__;
00060         i__4 = i__;
00061         q__1.r = ca->r * cx[i__4].r - ca->i * cx[i__4].i, q__1.i = ca->r * cx[
00062                 i__4].i + ca->i * cx[i__4].r;
00063         cx[i__3].r = q__1.r, cx[i__3].i = q__1.i;
00064 /* L10: */
00065     }
00066     return 0;
00067 
00068 /*        code for increment equal to 1 */
00069 
00070 L20:
00071     i__2 = *n;
00072     for (i__ = 1; i__ <= i__2; ++i__) {
00073         i__1 = i__;
00074         i__3 = i__;
00075         q__1.r = ca->r * cx[i__3].r - ca->i * cx[i__3].i, q__1.i = ca->r * cx[
00076                 i__3].i + ca->i * cx[i__3].r;
00077         cx[i__1].r = q__1.r, cx[i__1].i = q__1.i;
00078 /* L30: */
00079     }
00080     return 0;
00081 } /* cscal_ */


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autogenerated on Sat Jun 8 2019 18:55:33