----boundary-LibPST-iamunique-815798558_-_-
Content-type: text/plain
A
And to actually answer your question ...
Bits 52 .. 62 all 1s (ie exponent = 2047)
& Bits 0 .. 51 NOT all 0s (fraction non zero)
& Bit 63 (sign) don't care.
R
>> -----Original Message-----
>> From: blackbox{([at]})nowhere.xy>> Behalf Of A Thomas
>> Sent: 13 August 2007 09:04
>> To: BlackBox Mailing List
>> Subject: [BlackBox] - testing for NaNs
>>
>> *** WARNING ***
>>
>> This mail has originated outside your organization, either
>> from an external partner or the Global Internet.
>> Keep this in mind if you answer this message.
>>
>> Hei,
>>
>> I would like to test a REAL to see if it is a NaN. What
>> is the best way of doing this? If I use a variant record I
>> can regard the 8 byte real as two 4 byte integers (or maybe
>> better two variables of type SET)But what bit pattern will
>> indicate a NaN?
>>
>> Thanks
>>
>> Andrew
>>
>> --- BlackBox
>> --- send subject HELP or UNSUBSCRIBE to blackbox{([at]})nowhere.xy>>
>>
>>
SELEX Sensors and Airborne Systems Limited
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 3EL
A company registered in England & Wales. Company no. 02426132
********************************************************************
This email and any attachments are confidential to the intended
recipient and may also be privileged. If you are not the intended
recipient please delete it from your system and notify the sender.
You should not copy it or use it for any purpose nor disclose or
distribute its contents to any other person.
********************************************************************
--- BlackBox
--- send subject HELP or UNSUBSCRIBE to blackbox{([at]})nowhere.xy
----boundary-LibPST-iamunique-815798558_-_-
Content-type: application/rtf
Content-transfer-encoding: base64
Content-Disposition: attachment; filename="rtf-body.rtf"
e1xydGYxXGFuc2lcYW5zaWNwZzEyNTJcZnJvbXRleHQgXGRlZmYwe1xmb250dGJsDQp7XGYwXGZz
d2lzcyBBcmlhbDt9DQp7XGYxXGZtb2Rlcm4gQ291cmllciBOZXc7fQ0Ke1xmMlxmbmlsXGZjaGFy
c2V0MiBTeW1ib2w7fQ0Ke1xmM1xmbW9kZXJuXGZjaGFyc2V0MCBDb3VyaWVyIE5ldzt9fQ0Ke1xj
b2xvcnRibFxyZWQwXGdyZWVuMFxibHVlMDtccmVkMFxncmVlbjBcYmx1ZTI1NTt9DQpcdWMxXHBh
cmRccGxhaW5cZGVmdGFiMzYwIFxmMFxmczIwIFxwYXINCkFccGFyDQpccGFyDQpBbmQgdG8gYWN0
dWFsbHkgYW5zd2VyIHlvdXIgcXVlc3Rpb24gLi4uXHBhcg0KXHBhcg0KQml0cyA1MiAuLiA2MiBh
bGwgMXMgKGllIGV4cG9uZW50ID0gMjA0NylccGFyDQomIEJpdHMgMCAuLiA1MSBOT1QgYWxsIDBz
IChmcmFjdGlvbiBub24gemVybylccGFyDQomIEJpdCA2MyAoc2lnbikgZG9uJ3QgY2FyZS5ccGFy
DQpccGFyDQpSXHBhcg0KXHBhcg0KPj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS1ccGFyDQo+
PiBGcm9tOiBibGFja2JveEBvYmVyb24uY2ggW21haWx0bzpibGFja2JveEBvYmVyb24uY2hdIE9u
IFxwYXINCj4+IEJlaGFsZiBPZiBBIFRob21hc1xwYXINCj4+IFNlbnQ6IDEzIEF1Z3VzdCAyMDA3
IDA5OjA0XHBhcg0KPj4gVG86IEJsYWNrQm94IE1haWxpbmcgTGlzdFxwYXINCj4+IFN1YmplY3Q6
IFtCbGFja0JveF0gLSB0ZXN0aW5nIGZvciBOYU5zXHBhcg0KPj4gXHBhcg0KPj4gICAgICAgICAg
ICAgICAqKiogV0FSTklORyAqKipccGFyDQo+PiBccGFyDQo+PiBUaGlzIG1haWwgaGFzIG9yaWdp
bmF0ZWQgb3V0c2lkZSB5b3VyIG9yZ2FuaXphdGlvbiwgZWl0aGVyIFxwYXINCj4+IGZyb20gYW4g
ZXh0ZXJuYWwgcGFydG5lciBvciB0aGUgR2xvYmFsIEludGVybmV0LiBccGFyDQo+PiAgICAgIEtl
ZXAgdGhpcyBpbiBtaW5kIGlmIHlvdSBhbnN3ZXIgdGhpcyBtZXNzYWdlLiBccGFyDQo+PiBccGFy
DQo+PiBIZWksXHBhcg0KPj4gXHBhcg0KPj4gXHRhYiBJIHdvdWxkIGxpa2UgdG8gdGVzdCBhIFJF
QUwgdG8gc2VlIGlmIGl0IGlzIGEgTmFOLiBXaGF0IFxwYXINCj4+IGlzIHRoZSBiZXN0IHdheSBv
ZiBkb2luZyB0aGlzPyBJZiBJIHVzZSBhIHZhcmlhbnQgcmVjb3JkIEkgXHBhcg0KPj4gY2FuIHJl
Z2FyZCB0aGUgOCBieXRlIHJlYWwgYXMgdHdvIDQgYnl0ZSBpbnRlZ2VycyAob3IgbWF5YmUgXHBh
cg0KPj4gYmV0dGVyIHR3byB2YXJpYWJsZXMgb2YgdHlwZSBTRVQpQnV0IHdoYXQgYml0IHBhdHRl
cm4gd2lsbCBccGFyDQo+PiBpbmRpY2F0ZSBhIE5hTj9ccGFyDQo+PiBccGFyDQo+PiBUaGFua3Nc
cGFyDQo+PiBccGFyDQo+PiBcdGFiIEFuZHJld1xwYXINCj4+IFxwYXINCj4+IC0tLSBCbGFja0Jv
eFxwYXINCj4+IC0tLSBzZW5kIHN1YmplY3QgSEVMUCBvciBVTlNVQlNDUklCRSB0byBibGFja2Jv
eEBvYmVyb24uY2hccGFyDQo+PiBccGFyDQo+PiBccGFyDQo+PiBccGFyDQpccGFyDQpTRUxFWCBT
ZW5zb3JzIGFuZCBBaXJib3JuZSBTeXN0ZW1zIExpbWl0ZWRccGFyDQpSZWdpc3RlcmVkIE9mZmlj
ZTogU2lnbWEgSG91c2UsIENocmlzdG9waGVyIE1hcnRpbiBSb2FkLCBCYXNpbGRvbiwgRXNzZXgg
U1MxNCAzRUxccGFyDQpBIGNvbXBhbnkgcmVnaXN0ZXJlZCBpbiBFbmdsYW5kICYgV2FsZXMuICBD
b21wYW55IG5vLiAwMjQyNjEzMlxwYXINCioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioq
KioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqXHBhcg0KVGhpcyBlbWFpbCBhbmQg
YW55IGF0dGFjaG1lbnRzIGFyZSBjb25maWRlbnRpYWwgdG8gdGhlIGludGVuZGVkXHBhcg0KcmVj
aXBpZW50IGFuZCBtYXkgYWxzbyBiZSBwcml2aWxlZ2VkLiBJZiB5b3UgYXJlIG5vdCB0aGUgaW50
ZW5kZWRccGFyDQpyZWNpcGllbnQgcGxlYXNlIGRlbGV0ZSBpdCBmcm9tIHlvdXIgc3lzdGVtIGFu
ZCBub3RpZnkgdGhlIHNlbmRlci5ccGFyDQpZb3Ugc2hvdWxkIG5vdCBjb3B5IGl0IG9yIHVzZSBp
dCBmb3IgYW55IHB1cnBvc2Ugbm9yIGRpc2Nsb3NlIG9yXHBhcg0KZGlzdHJpYnV0ZSBpdHMgY29u
dGVudHMgdG8gYW55IG90aGVyIHBlcnNvbi5ccGFyDQoqKioqKioqKioqKioqKioqKioqKioqKioq
KioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKlxwYXINClxwYXINCi0t
LSBCbGFja0JveFxwYXINCi0tLSBzZW5kIHN1YmplY3QgSEVMUCBvciBVTlNVQlNDUklCRSB0byBi
bGFja2JveEBvYmVyb259fQBBMynABPAX
----boundary-LibPST-iamunique-815798558_-_---
Received on Mon Aug 13 2007 - 12:18:19 UTC