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diff lib/printf-frexp.c @ 8253:c59696ff6dbc

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Add comment about FLT_RADIX.
author Bruno Haible <bruno@clisp.org>
date Sun, 25 Feb 2007 18:08:24 +0000
parents 2b8747d9d9dd
children e6c6a9a180a5
line wrap: on
line diff
--- a/lib/printf-frexp.c
+++ b/lib/printf-frexp.c
@@ -29,6 +29,10 @@
 # include <float.h>
 # include <math.h>
 
+/* This file assumes FLT_RADIX = 2.  If FLT_RADIX is a power of 2 greater
+   than 2, or not even a power of 2, some rounding errors can occur, so that
+   then the returned mantissa is only guaranteed to be <= 2.0, not < 2.0.  */
+
 # ifdef USE_LONG_DOUBLE
 #  define FUNC printf_frexpl
 #  define DOUBLE long double