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authorshmel1k <shmel1k@ydb.tech>2022-09-02 12:44:59 +0300
committershmel1k <shmel1k@ydb.tech>2022-09-02 12:44:59 +0300
commit90d450f74722da7859d6f510a869f6c6908fd12f (patch)
tree538c718dedc76cdfe37ad6d01ff250dd930d9278 /contrib/libs/clapack/icmax1.c
parent01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff)
downloadydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/icmax1.c')
-rw-r--r--contrib/libs/clapack/icmax1.c127
1 files changed, 127 insertions, 0 deletions
diff --git a/contrib/libs/clapack/icmax1.c b/contrib/libs/clapack/icmax1.c
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+/* icmax1.f -- translated by f2c (version 20061008).
+ You must link the resulting object file with libf2c:
+ on Microsoft Windows system, link with libf2c.lib;
+ on Linux or Unix systems, link with .../path/to/libf2c.a -lm
+ or, if you install libf2c.a in a standard place, with -lf2c -lm
+ -- in that order, at the end of the command line, as in
+ cc *.o -lf2c -lm
+ Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,
+
+ http://www.netlib.org/f2c/libf2c.zip
+*/
+
+#include "f2c.h"
+#include "blaswrap.h"
+
+integer icmax1_(integer *n, complex *cx, integer *incx)
+{
+ /* System generated locals */
+ integer ret_val, i__1;
+
+ /* Builtin functions */
+ double c_abs(complex *);
+
+ /* Local variables */
+ integer i__, ix;
+ real smax;
+
+
+/* -- LAPACK auxiliary routine (version 3.2) -- */
+/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
+/* November 2006 */
+
+/* .. Scalar Arguments .. */
+/* .. */
+/* .. Array Arguments .. */
+/* .. */
+
+/* Purpose */
+/* ======= */
+
+/* ICMAX1 finds the index of the element whose real part has maximum */
+/* absolute value. */
+
+/* Based on ICAMAX from Level 1 BLAS. */
+/* The change is to use the 'genuine' absolute value. */
+
+/* Contributed by Nick Higham for use with CLACON. */
+
+/* Arguments */
+/* ========= */
+
+/* N (input) INTEGER */
+/* The number of elements in the vector CX. */
+
+/* CX (input) COMPLEX array, dimension (N) */
+/* The vector whose elements will be summed. */
+
+/* INCX (input) INTEGER */
+/* The spacing between successive values of CX. INCX >= 1. */
+
+/* ===================================================================== */
+
+/* .. Local Scalars .. */
+/* .. */
+/* .. Intrinsic Functions .. */
+/* .. */
+/* .. Statement Functions .. */
+/* .. */
+/* .. Statement Function definitions .. */
+
+/* NEXT LINE IS THE ONLY MODIFICATION. */
+/* .. */
+/* .. Executable Statements .. */
+
+ /* Parameter adjustments */
+ --cx;
+
+ /* Function Body */
+ ret_val = 0;
+ if (*n < 1) {
+ return ret_val;
+ }
+ ret_val = 1;
+ if (*n == 1) {
+ return ret_val;
+ }
+ if (*incx == 1) {
+ goto L30;
+ }
+
+/* CODE FOR INCREMENT NOT EQUAL TO 1 */
+
+ ix = 1;
+ smax = c_abs(&cx[1]);
+ ix += *incx;
+ i__1 = *n;
+ for (i__ = 2; i__ <= i__1; ++i__) {
+ if (c_abs(&cx[ix]) <= smax) {
+ goto L10;
+ }
+ ret_val = i__;
+ smax = c_abs(&cx[ix]);
+L10:
+ ix += *incx;
+/* L20: */
+ }
+ return ret_val;
+
+/* CODE FOR INCREMENT EQUAL TO 1 */
+
+L30:
+ smax = c_abs(&cx[1]);
+ i__1 = *n;
+ for (i__ = 2; i__ <= i__1; ++i__) {
+ if (c_abs(&cx[i__]) <= smax) {
+ goto L40;
+ }
+ ret_val = i__;
+ smax = c_abs(&cx[i__]);
+L40:
+ ;
+ }
+ return ret_val;
+
+/* End of ICMAX1 */
+
+} /* icmax1_ */