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/* dlaisnan.f -- translated by f2c (version 20061008).
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You must link the resulting object file with libf2c:
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on Microsoft Windows system, link with libf2c.lib;
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on Linux or Unix systems, link with .../path/to/libf2c.a -lm
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or, if you install libf2c.a in a standard place, with -lf2c -lm
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-- in that order, at the end of the command line, as in
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cc *.o -lf2c -lm
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Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,
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http://www.netlib.org/f2c/libf2c.zip
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*/
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#include "clapack.h"
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logical dlaisnan_(doublereal *din1, doublereal *din2)
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{
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/* System generated locals */
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logical ret_val;
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/* -- LAPACK auxiliary routine (version 3.2) -- */
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/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
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/* November 2006 */
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/* .. Scalar Arguments .. */
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/* .. */
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/* Purpose */
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/* ======= */
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/* This routine is not for general use. It exists solely to avoid */
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/* over-optimization in DISNAN. */
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/* DLAISNAN checks for NaNs by comparing its two arguments for */
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/* inequality. NaN is the only floating-point value where NaN != NaN */
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/* returns .TRUE. To check for NaNs, pass the same variable as both */
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/* arguments. */
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/* A compiler must assume that the two arguments are */
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/* not the same variable, and the test will not be optimized away. */
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/* Interprocedural or whole-program optimization may delete this */
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/* test. The ISNAN functions will be replaced by the correct */
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/* Fortran 03 intrinsic once the intrinsic is widely available. */
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/* Arguments */
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/* ========= */
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/* DIN1 (input) DOUBLE PRECISION */
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/* DIN2 (input) DOUBLE PRECISION */
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/* Two numbers to compare for inequality. */
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/* ===================================================================== */
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/* .. Executable Statements .. */
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ret_val = *din1 != *din2;
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return ret_val;
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} /* dlaisnan_ */
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