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authorUlrich Drepper <drepper@redhat.com>2000-12-04 01:26:09 +0000
committerUlrich Drepper <drepper@redhat.com>2000-12-04 01:26:09 +0000
commit3d165855f2de19f3f5dc51d193dbe9431121a5c5 (patch)
tree230c9ea7b5ab8d0cc793b455ed4eff079ef9040f /sysdeps
parent8cd806cfc8f8fe7b70cc30eb30579f5ee9503eab (diff)
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Update.
* sysdeps/i386/fpu/fpclassify.c: New file.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/i386/fpu/s_fpclassifyl.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/i386/fpu/s_fpclassifyl.c b/sysdeps/i386/fpu/s_fpclassifyl.c
new file mode 100644
index 0000000..61481f0
--- /dev/null
+++ b/sysdeps/i386/fpu/s_fpclassifyl.c
@@ -0,0 +1,42 @@
+/* Return classification value corresponding to argument.
+ Copyright (C) 1997, 2000 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. 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"
+
+
+int
+__fpclassifyl (long double x)
+{
+ u_int32_t ex, hx, lx;
+ int retval = FP_NORMAL;
+
+ GET_LDOUBLE_WORDS (ex, hx, lx, x);
+ ex &= 0x7fff;
+ if ((ex | lx | hx) == 0)
+ retval = FP_ZERO;
+ else if (ex == 0 && (hx & 0x80000000) == 0)
+ retval = FP_SUBNORMAL;
+ else if (ex == 0x7fff)
+ retval = ((hx & 0x7fffffff) | lx) != 0 ? FP_NAN : FP_INFINITE;
+
+ return retval;
+}