Newsgroups: fj.lang.c
Path: galaxy.trc.rwcp.or.jp!jaist-news1!coconuts.jaist!wnoc-tyo-news!scslwide!wsgw!wsservra!sakamoto
From: sakamoto@sm.sony.co.jp (Tomohiko Sakamoto)
Subject: Re: NaN of IEEE754 in C
Message-ID: <CrK3pC.H61@wsservra.sm.sony.co.jp>
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Organization: Computer Systems Design Dept., BIS, Sony Corporation
References: <NOZOMI.94Jun15103143@glaucomys.seino.tsukuba.ac.jp>
Date: Fri, 17 Jun 1994 19:34:22 GMT
Lines: 23
Xref: galaxy.trc.rwcp.or.jp fj.lang.c:1444
X-originally-archived-at: http://galaxy.rwcp.or.jp/text/cgi-bin/newsarticle2?ng=fj.lang.c&nb=1444&hd=a
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In article <NOZOMI.94Jun15103143@glaucomys.seino.tsukuba.ac.jp>,
        nozomi@glaucomys.seino.tsukuba.ac.jp says:
> IEEE754 $B$N(B NaN $B$N<BAu$,=hM}7O$K$h$C$F$I$&$J$C$F$$$k$+D4$Y$F$$$^$9!#(B
> gcc, Symantec/Zortech C++ $B$G$O(B NAN $B$H$7$F%^%/%mDj5A$5$l$F$$$^$7$?!#(B
> $B$=$N$[$+$N=hM}7O$G$I$&$J$C$F$$$k$+$4B8CN$NJ}$O$<$R$*65$(2<$5$$!#(B

 1     11                     52
+-+----------+--------------------------------------+
|s| exponent |            mantissa                  |
+-+----------+--------------------------------------+

CISC NEWS $B$G(B exponent = 0x7ff $B$N$H$-!"(B
mantissa = 0x0000000000000 $B$J$i(B Infinity
mantissa = 0x0000000000001$B!A(B0x7ffffffffffff $B$J$i(B signaling NaN
mantissa = 0x8000000000000$B!A(B0xfffffffffffff $B$J$i(B quiet NaN

RISC NEWS $B$G(B exponent = 0x7ff $B$N$H$-!"(B
mantissa = 0x0000000000000 $B$J$i(B Infinity
mantissa = 0x0000000000001$B!A(B0x7ffffffffffff $B$J$i(B quiet NaN
mantissa = 0x8000000000000$B!A(B0xfffffffffffff $B$J$i(B signaling NaN

--
$B:dK\CRI'(Bsakamoto@sm.sony.co.jp
