/* dlaisnan.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"
logical dlaisnan_(doublereal *din1, doublereal *din2)
{
/* System generated locals */
logical ret_val;
/* -- LAPACK auxiliary routine (version 3.2) -- */
/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
/* November 2006 */
/* .. Scalar Arguments .. */
/* .. */
/* Purpose */
/* ======= */
/* This routine is not for general use. It exists solely to avoid */
/* over-optimization in DISNAN. */
/* DLAISNAN checks for NaNs by comparing its two arguments for */
/* inequality. NaN is the only floating-point value where NaN != NaN */
/* returns .TRUE. To check for NaNs, pass the same variable as both */
/* arguments. */
/* A compiler must assume that the two arguments are */
/* not the same variable, and the test will not be optimized away. */
/* Interprocedural or whole-program optimization may delete this */
/* test. The ISNAN functions will be replaced by the correct */
/* Fortran 03 intrinsic once the intrinsic is widely available. */
/* Arguments */
/* ========= */
/* DIN1 (input) DOUBLE PRECISION */
/* DIN2 (input) DOUBLE PRECISION */
/* Two numbers to compare for inequality. */
/* ===================================================================== */
/* .. Executable Statements .. */
ret_val = *din1 != *din2;
return ret_val;
} /* dlaisnan_ */