diff options
| author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2012-12-29 06:56:04 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2012-12-29 06:56:04 +0530 |
| commit | 085ec079e37b0013b421c97b467c6b8ea36a1289 (patch) | |
| tree | 9a1c10530befa9e1e2358a425d9857d693ae7463 /sysdeps/ieee754/dbl-64/branred.h | |
| parent | c93c5dec54a64563ce85b511053bd22161085d77 (diff) | |
| download | glibc-085ec079e37b0013b421c97b467c6b8ea36a1289.tar.gz glibc-085ec079e37b0013b421c97b467c6b8ea36a1289.tar.xz glibc-085ec079e37b0013b421c97b467c6b8ea36a1289.zip | |
Demystify the magic number 134217729.0
The number 134217729.0 gets used in various places in e_pow.c but there is no explanation of what that number is. Add that explanation.
Diffstat (limited to 'sysdeps/ieee754/dbl-64/branred.h')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/branred.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sysdeps/ieee754/dbl-64/branred.h b/sysdeps/ieee754/dbl-64/branred.h index c1e73543eb..c0a6e78ef6 100644 --- a/sysdeps/ieee754/dbl-64/branred.h +++ b/sysdeps/ieee754/dbl-64/branred.h @@ -1,7 +1,7 @@ /* * IBM Accurate Mathematical Library * Written by International Business Machines Corp. - * Copyright (C) 2001 Free Software Foundation, Inc. + * Copyright (C) 2001-2012 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by @@ -26,6 +26,7 @@ #ifndef BRANRED_H #define BRANRED_H +#include <dla.h> #ifdef BIG_ENDI static const mynumber @@ -74,6 +75,6 @@ static const double toverp[75] = { /* 2/ PI base 24*/ 12618859.0, 4703257.0, 12806093.0, 14477321.0, 2786137.0, 12875403.0, 9837734.0, 14528324.0, 13719321.0, 343717.0 }; -static const double split = 134217729.0; +static const double split = CN; /* 2^27 + 1 */ #endif |