aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/ieee754/dbl-64/s_logb.c
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_logb.c')
-rw-r--r--sysdeps/ieee754/dbl-64/s_logb.c52
1 files changed, 0 insertions, 52 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_logb.c b/sysdeps/ieee754/dbl-64/s_logb.c
deleted file mode 100644
index 3a26b18f78..0000000000
--- a/sysdeps/ieee754/dbl-64/s_logb.c
+++ /dev/null
@@ -1,52 +0,0 @@
-/* @(#)s_logb.c 5.1 93/09/24 */
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-/*
- * double logb(x)
- * IEEE 754 logb. Included to pass IEEE test suite. Not recommend.
- * Use ilogb instead.
- */
-
-#include <math.h>
-#include <math_private.h>
-#include <fix-int-fp-convert-zero.h>
-
-double
-__logb (double x)
-{
- int32_t lx, ix, rix;
-
- EXTRACT_WORDS (ix, lx, x);
- ix &= 0x7fffffff; /* high |x| */
- if ((ix | lx) == 0)
- return -1.0 / fabs (x);
- if (ix >= 0x7ff00000)
- return x * x;
- if (__glibc_unlikely ((rix = ix >> 20) == 0))
- {
- /* POSIX specifies that denormal number is treated as
- though it were normalized. */
- int ma;
- if (ix == 0)
- ma = __builtin_clz (lx) + 32;
- else
- ma = __builtin_clz (ix);
- rix -= ma - 12;
- }
- if (FIX_INT_FP_CONVERT_ZERO && rix == 1023)
- return 0.0;
- return (double) (rix - 1023);
-}
-weak_alias (__logb, logb)
-#ifdef NO_LONG_DOUBLE
-strong_alias (__logb, __logbl) weak_alias (__logb, logbl)
-#endif