🚀 go-pugleaf

In article <1453@tmcaen1.kouku-k.ac.jp>,
        suzuki@info2.kouku-k.ac.jp (Hiroshi Suzuki) says:
> $B$G$9$+$i!"$I$&$$$&IbF0>.?tE@I=8=$K$J$C$F$k$s$G$7$g$&!)(B
> $B2>?tIt!JM-8z?t;z(B)$B$,(B1024bit$B$"$k$s$G$7$g$&$+(B?

+-------+----------------+--------------------------------------------+
|$BId9f(B(1)|    $B;X?t(B(11)    |               $B2>?t(B(52)                     |
+-------+----------------+--------------------------------------------+

$BId9f(B $B;X?t(B    $B2>?t(B
   0 7ff fffffffffffff : NaN($BHs?t(B)
   0 7ff 0000000000001 : NaN($BHs?t(B)
   0 7ff 0000000000000 : Infinity($BL58BBg(B)
   0 7fe fffffffffffff : 1.7976931348623157e+308 = 2^1024 - 2^971
   0 7fe 0000000000000 : 8.9884656743115795e+307 = 2^1023
   0 400 0000000000000 : 2.0000000000000000e+00  = 2^1
   0 001 0000000000000 : 2.2250738585072014e-308 = 2^-1022
   0 000 fffffffffffff : 2.2250738585072009e-308 = 2^-1022 - 2^-1074
   0 000 0000000000001 : 4.9406564584124654e-324 = 2^-1074
   0 000 0000000000000 : 0.0000000000000000e+00  = 0

$B;X?t$,(B 0x7ff $B$N>l9g!"(B
	$B2>?t$,(B 0 $B$G$J$1$l$P!"(BNaN$B!#(B
	$B2>?t$,(B 0 $B$J$i!"(BInfinity$B!#(B
$B;X?t$,(B 0x001$B!A(B0x7fe(1$B!A(B2046) $B$N>l9g!"(B
		$B@55,2=$5$l$??t(B       (1.$B2>?t(B) * 2^($B;X?t(B-1023)$B!#(B
$B;X?t$,(B 0x000 $B$N>l9g!"(B
	$B2>?t$,(B 0 $B$G$J$1$l$P!"(B
		$B@55,2=$5$l$F$$$J$$?t(B (0.$B2>?t(B) * 2^($B;X?t(B-1023)$B!#(B
	$B2>?t$,(B 0 $B$J$i!"(B0$B!#(B

$B!ZNc![(B
	3.25 = 11.01 = 1.101 * 2^1 = 0 400 a000000000000

$B!Z$*$^$1![(B
% bc
2^1023
8988465674311579538646525953945123668089884894711532863671504057886633\
7902750481566354238661203768010560056939935696678829394884407208311246\
4237153197370621888839467124327426381511098006230470597265414760425028\
8441907534117123144073695655527041361858167525534229314911997362296923\
9858152417678164812112068608
2^1024
179769313486231590772930519078902473361797697894230657273430081157732\
6758055009631327084773224075360211201138798713933576587897688144166224\
9284743063947412437776789342486548527630221960124609411945308295208500\
5768838150682342462881473913110540827237163350510684586298239947245938\
479716304835356329624224137216
2^1024-2^(1024-53)
179769313486231570814527423731704356798070567525844996598917476803157\
2607800285387605895586327668781715404589535143824642343213268894641827\
6846754670353751698604991057655128207624549009038932894407586850845513\
3942304583236903222948165808559332123348274797826204144723168738177180\
919299881250404026184124858368
^D
--
$B:dK\CRI'(B
sakamoto@sm.sony.co.jp