summaryrefslogtreecommitdiff
path: root/sysdeps/ieee754/logb.c
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/ieee754/logb.c')
-rw-r--r--sysdeps/ieee754/logb.c48
1 files changed, 0 insertions, 48 deletions
diff --git a/sysdeps/ieee754/logb.c b/sysdeps/ieee754/logb.c
deleted file mode 100644
index 918de9ebad..0000000000
--- a/sysdeps/ieee754/logb.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/* Copyright (C) 1992, 1995 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 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. */
-
-#include <ansidecl.h>
-#include <math.h>
-#include <float.h>
-#include "ieee754.h"
-
-/* Return the base 2 signed integral exponent of X. */
-double
-DEFUN(__logb, (x), double x)
-{
- union ieee754_double u;
-
- if (__isnan (x))
- return x;
- else if (__isinf (x))
- return HUGE_VAL;
- else if (x == 0.0)
- return - HUGE_VAL;
-
- u.d = x;
-
- if (u.ieee.exponent == 0)
- /* A denormalized number.
- Multiplying by 2 ** DBL_MANT_DIG normalizes it;
- we then subtract the DBL_MANT_DIG we added to the exponent. */
- return (__logb (x * ldexp (1.0, DBL_MANT_DIG)) - DBL_MANT_DIG);
-
- return (int) u.ieee.exponent - (DBL_MAX_EXP - 1);
-}
-
-weak_alias (__logb, logb)