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* [Bug gdb/15318] New: Printing floating point numbers as hexadecimal outputs wrongly the integer conversion @ 2013-03-28 12:31 sogartary at yahoo dot com 2013-03-28 12:32 ` [Bug gdb/15318] " sogartary at yahoo dot com ` (5 more replies) 0 siblings, 6 replies; 7+ messages in thread From: sogartary at yahoo dot com @ 2013-03-28 12:31 UTC (permalink / raw) To: gdb-prs http://sourceware.org/bugzilla/show_bug.cgi?id=15318 Bug #: 15318 Summary: Printing floating point numbers as hexadecimal outputs wrongly the integer conversion Product: gdb Version: 7.5 Status: NEW Severity: normal Priority: P2 Component: gdb AssignedTo: unassigned@sourceware.org ReportedBy: sogartary@yahoo.com Classification: Unclassified When printing a float or a double as a hexadecimal the number is first cast to integer and then the integer is printed in hex. The correct behaviour is to take the bits of the floating point value, reinterpret them as integer and print them in hex. Here is an example. We have the following code: double dd = 0.00014335116245 + 0x1FFF; then in GDB after breaking on the next line we issue the following commands: (gdb) p dd $1 = 8191.0001433511625 (gdb) p/x 8191 $2 = 0x1fff (gdb) p/x dd $3 = 0x1fff (gdb) p/x *reinterpret_cast<int64_t*>(&dd) $4 = 0x40bfff000965088e On the third command GDB should return the same as the result from the fourth command. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug gdb/15318] Printing floating point numbers as hexadecimal outputs wrongly the integer conversion 2013-03-28 12:31 [Bug gdb/15318] New: Printing floating point numbers as hexadecimal outputs wrongly the integer conversion sogartary at yahoo dot com @ 2013-03-28 12:32 ` sogartary at yahoo dot com 2013-03-28 12:35 ` sogartary at yahoo dot com ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: sogartary at yahoo dot com @ 2013-03-28 12:32 UTC (permalink / raw) To: gdb-prs http://sourceware.org/bugzilla/show_bug.cgi?id=15318 sogartary at yahoo dot com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |sogartary at yahoo dot com -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug gdb/15318] Printing floating point numbers as hexadecimal outputs wrongly the integer conversion 2013-03-28 12:31 [Bug gdb/15318] New: Printing floating point numbers as hexadecimal outputs wrongly the integer conversion sogartary at yahoo dot com 2013-03-28 12:32 ` [Bug gdb/15318] " sogartary at yahoo dot com @ 2013-03-28 12:35 ` sogartary at yahoo dot com 2013-03-28 12:41 ` [Bug c++/15318] " sogartary at yahoo dot com ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: sogartary at yahoo dot com @ 2013-03-28 12:35 UTC (permalink / raw) To: gdb-prs http://sourceware.org/bugzilla/show_bug.cgi?id=15318 --- Comment #1 from Sogartar <sogartary at yahoo dot com> 2013-03-28 12:35:23 UTC --- I can reproduce this in version 7.4 also. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/15318] Printing floating point numbers as hexadecimal outputs wrongly the integer conversion 2013-03-28 12:31 [Bug gdb/15318] New: Printing floating point numbers as hexadecimal outputs wrongly the integer conversion sogartary at yahoo dot com 2013-03-28 12:32 ` [Bug gdb/15318] " sogartary at yahoo dot com 2013-03-28 12:35 ` sogartary at yahoo dot com @ 2013-03-28 12:41 ` sogartary at yahoo dot com 2013-03-28 16:07 ` tromey at redhat dot com ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: sogartary at yahoo dot com @ 2013-03-28 12:41 UTC (permalink / raw) To: gdb-prs http://sourceware.org/bugzilla/show_bug.cgi?id=15318 Sogartar <sogartary at yahoo dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Component|gdb |c++ -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/15318] Printing floating point numbers as hexadecimal outputs wrongly the integer conversion 2013-03-28 12:31 [Bug gdb/15318] New: Printing floating point numbers as hexadecimal outputs wrongly the integer conversion sogartary at yahoo dot com ` (2 preceding siblings ...) 2013-03-28 12:41 ` [Bug c++/15318] " sogartary at yahoo dot com @ 2013-03-28 16:07 ` tromey at redhat dot com 2013-04-05 15:49 ` sogartary at yahoo dot com 2020-06-06 14:59 ` tromey at sourceware dot org 5 siblings, 0 replies; 7+ messages in thread From: tromey at redhat dot com @ 2013-03-28 16:07 UTC (permalink / raw) To: gdb-prs http://sourceware.org/bugzilla/show_bug.cgi?id=15318 Tom Tromey <tromey at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |tromey at redhat dot com --- Comment #2 from Tom Tromey <tromey at redhat dot com> 2013-03-28 16:07:12 UTC --- I agree the current behavior is weird, but I'm not sure that this should act like the reinterpret_cast. Instead maybe it should print a hex floating point representation. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/15318] Printing floating point numbers as hexadecimal outputs wrongly the integer conversion 2013-03-28 12:31 [Bug gdb/15318] New: Printing floating point numbers as hexadecimal outputs wrongly the integer conversion sogartary at yahoo dot com ` (3 preceding siblings ...) 2013-03-28 16:07 ` tromey at redhat dot com @ 2013-04-05 15:49 ` sogartary at yahoo dot com 2020-06-06 14:59 ` tromey at sourceware dot org 5 siblings, 0 replies; 7+ messages in thread From: sogartary at yahoo dot com @ 2013-04-05 15:49 UTC (permalink / raw) To: gdb-prs http://sourceware.org/bugzilla/show_bug.cgi?id=15318 --- Comment #3 from Sogartar <sogartary at yahoo dot com> 2013-04-05 15:49:47 UTC --- Then this is will be a change of the given feature, since the documentation specifies: "Regard the bits of the value as an integer, and print the integer in hexadecimal." -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/15318] Printing floating point numbers as hexadecimal outputs wrongly the integer conversion 2013-03-28 12:31 [Bug gdb/15318] New: Printing floating point numbers as hexadecimal outputs wrongly the integer conversion sogartary at yahoo dot com ` (4 preceding siblings ...) 2013-04-05 15:49 ` sogartary at yahoo dot com @ 2020-06-06 14:59 ` tromey at sourceware dot org 5 siblings, 0 replies; 7+ messages in thread From: tromey at sourceware dot org @ 2020-06-06 14:59 UTC (permalink / raw) To: gdb-prs https://sourceware.org/bugzilla/show_bug.cgi?id=15318 Tom Tromey <tromey at sourceware dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE CC| |tromey at sourceware dot org --- Comment #5 from Tom Tromey <tromey at sourceware dot org> --- Dup. *** This bug has been marked as a duplicate of bug 16242 *** -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2020-06-06 14:59 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-03-28 12:31 [Bug gdb/15318] New: Printing floating point numbers as hexadecimal outputs wrongly the integer conversion sogartary at yahoo dot com 2013-03-28 12:32 ` [Bug gdb/15318] " sogartary at yahoo dot com 2013-03-28 12:35 ` sogartary at yahoo dot com 2013-03-28 12:41 ` [Bug c++/15318] " sogartary at yahoo dot com 2013-03-28 16:07 ` tromey at redhat dot com 2013-04-05 15:49 ` sogartary at yahoo dot com 2020-06-06 14:59 ` tromey at sourceware dot org
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