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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/sladiv.c
parent01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff)
downloadydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz
[] add metering mode to CLI
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+/* sladiv.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"
+
+/* Subroutine */ int sladiv_(real *a, real *b, real *c__, real *d__, real *p,
+ real *q)
+{
+ real e, f;
+
+
+/* -- LAPACK auxiliary routine (version 3.2) -- */
+/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
+/* November 2006 */
+
+/* .. Scalar Arguments .. */
+/* .. */
+
+/* Purpose */
+/* ======= */
+
+/* SLADIV performs complex division in real arithmetic */
+
+/* a + i*b */
+/* p + i*q = --------- */
+/* c + i*d */
+
+/* The algorithm is due to Robert L. Smith and can be found */
+/* in D. Knuth, The art of Computer Programming, Vol.2, p.195 */
+
+/* Arguments */
+/* ========= */
+
+/* A (input) REAL */
+/* B (input) REAL */
+/* C (input) REAL */
+/* D (input) REAL */
+/* The scalars a, b, c, and d in the above expression. */
+
+/* P (output) REAL */
+/* Q (output) REAL */
+/* The scalars p and q in the above expression. */
+
+/* ===================================================================== */
+
+/* .. Local Scalars .. */
+/* .. */
+/* .. Intrinsic Functions .. */
+/* .. */
+/* .. Executable Statements .. */
+
+ if (dabs(*d__) < dabs(*c__)) {
+ e = *d__ / *c__;
+ f = *c__ + *d__ * e;
+ *p = (*a + *b * e) / f;
+ *q = (*b - *a * e) / f;
+ } else {
+ e = *c__ / *d__;
+ f = *d__ + *c__ * e;
+ *p = (*b + *a * e) / f;
+ *q = (-(*a) + *b * e) / f;
+ }
+
+ return 0;
+
+/* End of SLADIV */
+
+} /* sladiv_ */