Update.

[platform/upstream/glibc.git] / sysdeps / m68k / fpu / s_ilogb.c

diff --git a/sysdeps/m68k/fpu/s_ilogb.c b/sysdeps/m68k/fpu/s_ilogb.c
index c80a288..ef90946 100644 (file)
--- a/sysdeps/m68k/fpu/s_ilogb.c
+++ b/sysdeps/m68k/fpu/s_ilogb.c
@@ -1,38 +1,50 @@
-/* Copyright (C) 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
 
-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 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.
+   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., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
+   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 <ansidecl.h>
 #include <math.h>
 
-#ifndef FUNC
-#define FUNC ilogb
+#ifndef SUFF
+#define SUFF
 #endif
 #ifndef float_type
 #define float_type double
 #endif
 
-#define __CONCATX(a,b) __CONCAT(a,b)
+#define CONCATX(a,b) __CONCAT(a,b)
+#define s(name) CONCATX(name,SUFF)
+#define m81(func) __m81_u(s(func))
 
 int
-DEFUN(__CONCATX(__,FUNC), (x), float_type x)
+s(__ilogb) (float_type x)
 {
-  return __m81_u(__CONCATX(__,FUNC))(x);
+  float_type result;
+  unsigned long x_cond;
+
+  x_cond = __m81_test (x);
+  /* We must return consistent values for zero and NaN.  */
+  if (x_cond & __M81_COND_ZERO)
+    return FP_ILOGB0;
+  if (x_cond & (__M81_COND_NAN | __M81_COND_INF))
+    return FP_ILOGBNAN;
+
+  __asm ("fgetexp%.x %1, %0" : "=f" (result) : "f" (x));
+  return (int) result;
 }
 
 #define weak_aliasx(a,b) weak_alias(a,b)
-weak_aliasx (__CONCATX(__,FUNC), FUNC)
+weak_aliasx (s(__ilogb), s(ilogb))