55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
#include "blaswrap.h"
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#ifdef _cpluscplus
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extern "C" {
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#endif
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#include "f2c.h"
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doublereal dzasum_(integer *n, doublecomplex *zx, integer *incx)
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{
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/* System generated locals */
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integer i__1;
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doublereal ret_val;
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/* Local variables */
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static integer i__;
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static doublereal stemp;
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extern doublereal dcabs1_(doublecomplex *);
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static integer ix;
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/* takes the sum of the absolute values.
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jack dongarra, 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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--zx;
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/* Function Body */
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ret_val = 0.;
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stemp = 0.;
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if (*n <= 0 || *incx <= 0) {
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return ret_val;
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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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ix = 1;
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i__1 = *n;
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for (i__ = 1; i__ <= i__1; ++i__) {
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stemp += dcabs1_(&zx[ix]);
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ix += *incx;
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/* L10: */
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}
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ret_val = stemp;
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return ret_val;
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/* code for increment equal to 1 */
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L20:
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i__1 = *n;
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for (i__ = 1; i__ <= i__1; ++i__) {
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stemp += dcabs1_(&zx[i__]);
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/* L30: */
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}
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ret_val = stemp;
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return ret_val;
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} /* dzasum_ */
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#ifdef _cpluscplus
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}
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#endif
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