1 .\" Copyright 2004 Andries Brouwer <aeb@cwi.nl>.
2 .\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
3 .\" <mtk.manpages@gmail.com>
5 .\" Permission is granted to make and distribute verbatim copies of this
6 .\" manual provided the copyright notice and this permission notice are
7 .\" preserved on all copies.
9 .\" Permission is granted to copy and distribute modified versions of this
10 .\" manual under the conditions for verbatim copying, provided that the
11 .\" entire resulting derived work is distributed under the terms of a
12 .\" permission notice identical to this one.
14 .\" Since the Linux kernel and libraries are constantly changing, this
15 .\" manual page may be incorrect or out-of-date. The author(s) assume no
16 .\" responsibility for errors or omissions, or for damages resulting from
17 .\" the use of the information contained herein. The author(s) may not
18 .\" have taken the same level of care in the production of this manual,
19 .\" which is licensed free of charge, as they might when working
22 .\" Formatted or processed versions of this manual, if unaccompanied by
23 .\" the source, must acknowledge the copyright and authors of this work.
25 .\" Japanese Version Copyright (c) 2005 Yuichi SATO all rights reserved.
26 .\" and Copyright (c) 2008 Akihiro MOTOKI
27 .\" Translated Tue Feb 1 07:25:51 JST 2005
28 .\" by Yuichi SATO <ysato444@yahoo.co.jp>
29 .\" Updated 2008-09-16, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
31 .TH SCALB 3 2010-09-20 "" "Linux Programmer's Manual"
33 scalb, scalbf, scalbl \- ÉâÆ°¾®¿ôÅÀ¿ô¤ËÀ°¿ô¤Ç¤¢¤ë´ð¿ô¤ÎÎß¾è¤ò³Ý¤±¤ë (ÇÑ»ßͽÄê)
37 .BI "double scalb(double " x ", double " exp );
39 .BI "float scalbf(float " x ", double " exp );
41 .BI "long double scalbl(long double " x ", double " exp );
43 \fI\-lm\fP ¤Ç¥ê¥ó¥¯¤¹¤ë¡£
46 glibc ¸þ¤±¤Îµ¡Ç½¸¡ºº¥Þ¥¯¥í¤ÎÍ×·ï
47 .RB ( feature_test_macros (7)
54 _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 500 ||
55 _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED
61 _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600
65 ¤³¤ì¤é¤Î´Ø¿ô¤ÏºÇ½é¤Î°ú¤¿ô
73 ¤Ï¤ª¤½¤é¤¯ 2 ¤Ç¤¢¤ë)¡£¤Ä¤Þ¤ê¡¢°Ê²¼¤Î¼°¤ÎÃͤòÊÖ¤¹¡£
82 ¤ò¥¤¥ó¥¯¥ë¡¼¥É¤¹¤ë¤³¤È¤ÇÆÀ¤é¤ì¤ë¡£
83 .\" /usr/include ¤Ç¤Ï¤Ê¤¯¡¢gcc ¤Î lib ¤Ë¤¢¤ë¡£
85 À®¸ù¤¹¤ë¤È¡¢¤³¤ì¤é¤Î´Ø¿ô¤Ï \fIx\fP * \fBFLT_RADIX\fP ** \fIexp\fP ¤òÊÖ¤¹¡£
90 ¤¬ NaN ¤Î¾ì¹ç¡¢NaN ¤¬ÊÖ¤µ¤ì¤ë¡£
93 ¤¬Àµ¤Î̵¸ÂÂç (Éé¤Î̵¸ÂÂç) ¤Ç
95 ¤¬Éé¤Î̵¸ÂÂç¤Ç¤Ê¤¤¾ì¹ç¡¢Àµ¤Î̵¸ÂÂç (Éé¤Î̵¸ÂÂç) ¤¬ÊÖ¤µ¤ì¤ë¡£
100 ¤¬Àµ¤Î̵¸ÂÂç¤Ç¤Ê¤¤¾ì¹ç¡¢+0 (\-0) ¤¬ÊÖ¤µ¤ì¤ë¡£
105 ¤¬Àµ¤Î̵¸ÂÂç¤Î¾ì¹ç¡¢Îΰ襨¥é¡¼ (domain error) ¤¬È¯À¸¤·¡¢
111 ¤¬Éé¤Î̵¸ÂÂç¤Î¾ì¹ç¡¢Îΰ襨¥é¡¼ (domain error) ¤¬È¯À¸¤·¡¢
114 ·ë²Ì¤¬¥ª¡¼¥Ð¡¼¥Õ¥í¡¼¤¹¤ë¾ì¹ç¡¢
115 ÈÏ°Ï¥¨¥é¡¼ (range error) ¤¬È¯À¸¤·¡¢
124 ·ë²Ì¤¬¥¢¥ó¥À¡¼¥Õ¥í¡¼¤¹¤ë¾ì¹ç¡¢ÈÏ°Ï¥¨¥é¡¼¤¬È¯À¸¤·¡¢
125 ³Æ´Ø¿ô¤Ï 0 ¤òÊÖ¤¹¡£Éä¹æ¤Ï
129 ¤³¤ì¤é¤Î´Ø¿ô¤ò¸Æ¤Ó½Ð¤·¤¿ºÝ¤Ë¥¨¥é¡¼¤¬È¯À¸¤·¤¿¤«¤ÎȽÄêÊýË¡¤Ë¤Ä¤¤¤Æ¤Î¾ðÊó¤Ï
133 °Ê²¼¤Î¥¨¥é¡¼¤¬È¯À¸¤¹¤ë²ÄǽÀ¤¬¤¢¤ë¡£
135 Îΰ襨¥é¡¼ (domain error): \fIx\fP ¤¬ 0 ¤Ç \fIexp\fP ¤¬Àµ¤Î̵¸ÂÂç¡¢\
136 ¤Þ¤¿¤Ï \fIx\fP ¤¬Àµ¤Î̵¸ÂÂç¤Ç \fIexp\fP ¤¬Éé¤Î̵¸ÂÂç
140 ÉÔÀµ (invalid) ÉâÆ°¾®¿ôÅÀÎã³°
144 ÈÏ°Ï¥¨¥é¡¼ (range error)¡¢¥ª¡¼¥Ð¡¼¥Õ¥í¡¼
148 ¥ª¡¼¥Ð¡¼¥Õ¥í¡¼ÉâÆ°¾®¿ôÅÀÎã³°
152 ÈÏ°Ï¥¨¥é¡¼ (range error)¡¢¥¢¥ó¥À¡¼¥Õ¥í¡¼
156 ¥¢¥ó¥À¡¼¥Õ¥í¡¼ÉâÆ°¾®¿ôÅÀÎã³°
163 .\" FIXME . Is it intentional that these functions do not set errno?
164 .\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=6803
165 .\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=6804
168 ¤Ï POSIX.1-2001 ¤Çµ¬Äꤵ¤ì¤Æ¤¤¤ë¤¬¡¢ÇÑ»ßͽÄê¤È¤µ¤ì¤Æ¤¤¤ë¡£
171 ¤Î»ÅÍͤϺï½ü¤µ¤ì¤Æ¤ª¤ê¡¢Âå¤ï¤ê¤Ë
175 ¤Î»ÈÍѤ¬¿ä¾©¤µ¤ì¤Æ¤¤¤ë¡£
177 ´Ø¿ô¤Ï 4.3BSD ¤ËͳÍ褹¤ë¡£
182 ¤Ïɸ½à²½¤µ¤ì¤Æ¤¤¤Ê¤¤¡£
185 ¤Ï¤¤¤¯¤Ä¤«¤Î¾¤Î¥·¥¹¥Æ¥à¤Ë¸ºß¤¹¤ë¡£
186 .\" Looking at header files: scalbf() is present on the
187 .\" BSDs, Tru64, HP-UX 11, Irix 6.5; scalbl() is on HP-UX 11 and Tru64.