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author | shmel1k <shmel1k@ydb.tech> | 2022-09-02 12:44:59 +0300 |
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committer | shmel1k <shmel1k@ydb.tech> | 2022-09-02 12:44:59 +0300 |
commit | 90d450f74722da7859d6f510a869f6c6908fd12f (patch) | |
tree | 538c718dedc76cdfe37ad6d01ff250dd930d9278 /contrib/libs/clapack/sladiv.c | |
parent | 01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff) | |
download | ydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz |
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/sladiv.c')
-rw-r--r-- | contrib/libs/clapack/sladiv.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/contrib/libs/clapack/sladiv.c b/contrib/libs/clapack/sladiv.c new file mode 100644 index 0000000000..af4e0c5bfd --- /dev/null +++ b/contrib/libs/clapack/sladiv.c @@ -0,0 +1,78 @@ +/* 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_ */ |