1SLAISNAN(1)         LAPACK auxiliary routine (version 3.2)         SLAISNAN(1)
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NAME

6       SLAISNAN - routine i not for general use
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SYNOPSIS

9       LOGICAL FUNCTION SLAISNAN(SIN1,SIN2)
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11           REAL         SIN1,SIN2
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PURPOSE

14       This  routine  is not for general use.  It exists solely to avoid over-
15       optimization in SISNAN.
16       SLAISNAN checks for NaNs by comparing its two arguments for inequality.
17       NaN  is  the  only floating-point value where NaN != NaN returns .TRUE.
18       To check for NaNs, pass the same variable as both arguments.
19       A compiler must assume that the two arguments are
20       not the same variable, and the test will not be optimized away.  Inter‐
21       procedural  or  whole-program  optimization  may delete this test.  The
22       ISNAN functions will be replaced by the correct  Fortran  03  intrinsic
23       once the intrinsic is widely available.
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ARGUMENTS

26       SIN1     (input) REAL
27                SIN2     (input) REAL Two numbers to compare for inequality.
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31 LAPACK auxiliary routine (versionNo3v.e2m)ber 2008                     SLAISNAN(1)