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-rw-r--r--libm/s_fpclassify.c44
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diff --git a/libm/s_fpclassify.c b/libm/s_fpclassify.c
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+/* Return classification value corresponding to argument.
+ Copyright (C) 1997, 2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <math.h>
+
+#include "math_private.h"
+
+libm_hidden_proto (__fpclassify)
+int
+__fpclassify (double x)
+{
+ u_int32_t hx, lx;
+ int retval = FP_NORMAL;
+
+ EXTRACT_WORDS (hx, lx, x);
+ lx |= hx & 0xfffff;
+ hx &= 0x7ff00000;
+ if ((hx | lx) == 0)
+ retval = FP_ZERO;
+ else if (hx == 0)
+ retval = FP_SUBNORMAL;
+ else if (hx == 0x7ff00000)
+ retval = lx != 0 ? FP_NAN : FP_INFINITE;
+
+ return retval;
+}
+libm_hidden_def (__fpclassify)