"atomic bomb" commit. Reorganized OpenCV directory structure

3rdparty/lapack/slaisnan.c

@@ -0,0 +1,46 @@
+#include "clapack.h"
+
+logical slaisnan_(real *sin1, real *sin2)
+{
+    /* System generated locals */
+    logical ret_val;
+
+
+/*  -- LAPACK auxiliary routine (version 3.1) -- */
+/*     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 SISNAN. */
+
+/*  SLAISNAN 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. */
+
+/*  Strictly speaking, Fortran does not allow aliasing of function */
+/*  arguments. So 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 */
+/*  ========= */
+
+/*  SIN1     (input) REAL */
+/*  SIN2     (input) REAL */
+/*          Two numbers to compare for inequality. */
+
+/*  ===================================================================== */
+
+/*  .. Executable Statements .. */
+    ret_val = *sin1 != *sin2;
+    return ret_val;
+} /* slaisnan_ */