digitalmars.D.bugs - [Issue 4155] New: return of NaN to temporary fails equality test
- d-bugmail puremagic.com (36/36) May 03 2010 http://d.puremagic.com/issues/show_bug.cgi?id=4155
- d-bugmail puremagic.com (19/19) Feb 23 2012 http://d.puremagic.com/issues/show_bug.cgi?id=4155
- d-bugmail puremagic.com (11/11) Feb 26 2012 http://d.puremagic.com/issues/show_bug.cgi?id=4155
- d-bugmail puremagic.com (8/8) Apr 27 2012 http://d.puremagic.com/issues/show_bug.cgi?id=4155
- d-bugmail puremagic.com (8/8) Apr 27 2012 http://d.puremagic.com/issues/show_bug.cgi?id=4155
- d-bugmail puremagic.com (10/10) Apr 27 2012 http://d.puremagic.com/issues/show_bug.cgi?id=4155
http://d.puremagic.com/issues/show_bug.cgi?id=4155 Summary: return of NaN to temporary fails equality test Product: D Version: unspecified Platform: Other OS/Version: Windows Status: NEW Severity: normal Priority: P2 Component: DMD AssignedTo: nobody puremagic.com ReportedBy: melvin.curran googlemail.com The problem is found in both DMD 1.059 and 2.044 and is demonstrated by the following program - every answer should be false, but that is not the case. import std.stdio; T getnan(T)() { return T.nan; } void main() { float f = 0.0; double d = 0.0; real r = 0.0; writefln("before assigning NaN, float:%s, double:%s, real:%s", f, d, r); f = getnan!(float)(); d = getnan!(double)(); r = getnan!(real)(); writefln(" float test, literal:%s, assign:%s, temporary:%s", (float.nan == 0), (f == 0), (getnan!(float)() == 0)); writefln("double test, literal:%s, assign:%s, temporary:%s", (double.nan == 0), (d == 0), (getnan!(double)() == 0)); writefln(" real test, literal:%s, assign:%s, temporary:%s", (real.nan == 0), (r == 0), (getnan!(real)() == 0)); } -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
May 03 2010
http://d.puremagic.com/issues/show_bug.cgi?id=4155 yebblies <yebblies gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |pull CC| |yebblies gmail.com Platform|Other |x86 AssignedTo|nobody puremagic.com |yebblies gmail.com OS/Version|Windows |All Severity|normal |critical https://github.com/D-Programming-Language/dmd/pull/760 When T is a float or double, and in memory, dmd loads it to gp registers, doubles it, then tests for zero. When it's in ST(0), dmd uses fucompp to test but the code that tests the flags is unaware of this and doesn't check the zero flag to see if it was a nan comparison. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Feb 23 2012
http://d.puremagic.com/issues/show_bug.cgi?id=4155 yebblies <yebblies gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Version|unspecified |D1 & D2 New pull https://github.com/D-Programming-Language/dmd/pull/769 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Feb 26 2012
http://d.puremagic.com/issues/show_bug.cgi?id=4155 Commit pushed to dmd-1.x at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/ac10c87904a73311eba93143d1aa92988227be49 add yebblies fix Issue 4155 - return of NaN to temporary fails equality test -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 27 2012
http://d.puremagic.com/issues/show_bug.cgi?id=4155 Commit pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/e1d597875183f58464ac44b8eb5d3d28f1f90170 add yebblies fix Issue 4155 - return of NaN to temporary fails equality test -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 27 2012
http://d.puremagic.com/issues/show_bug.cgi?id=4155 Walter Bright <bugzilla digitalmars.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED CC| |bugzilla digitalmars.com Resolution| |FIXED -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 27 2012