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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/icmax1.c | |
parent | 01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff) | |
download | ydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz |
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/icmax1.c')
-rw-r--r-- | contrib/libs/clapack/icmax1.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/contrib/libs/clapack/icmax1.c b/contrib/libs/clapack/icmax1.c new file mode 100644 index 0000000000..98f589bb2f --- /dev/null +++ b/contrib/libs/clapack/icmax1.c @@ -0,0 +1,127 @@ +/* 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_ */ |