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| 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/dla.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/dla.h')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/dla.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sysdeps/ieee754/dbl-64/dla.h b/sysdeps/ieee754/dbl-64/dla.h index c92fcfe348..3feb3d4503 100644 --- a/sysdeps/ieee754/dbl-64/dla.h +++ b/sysdeps/ieee754/dbl-64/dla.h @@ -1,7 +1,7 @@ /* * IBM Accurate Mathematical Library * Written by International Business Machines Corp. - * Copyright (C) 2001, 2011 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 @@ -34,7 +34,8 @@ /* IEEE double. */ /***********************************************************************/ -/* CN = 1+2**27 = '41a0000002000000' IEEE double format */ +/* CN = 1+2**27 = '41a0000002000000' IEEE double format. Use it to split a + double for better accuracy. */ #define CN 134217729.0 |