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* [Bug math/26983] New: [x86_64] x86_64 tgamma has too large ULP error @ 2020-11-30 10:33 zimmerma+gcc at loria dot fr 2020-12-01 23:51 ` [Bug math/26983] " woodard at redhat dot com ` (4 more replies) 0 siblings, 5 replies; 6+ messages in thread From: zimmerma+gcc at loria dot fr @ 2020-11-30 10:33 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26983 Bug ID: 26983 Summary: [x86_64] x86_64 tgamma has too large ULP error Product: glibc Version: 2.32 Status: UNCONFIRMED Severity: normal Priority: P2 Component: math Assignee: unassigned at sourceware dot org Reporter: zimmerma+gcc at loria dot fr CC: joseph at codesourcery dot com Target Milestone: --- $ cat test2.c #include <stdio.h> #include <math.h> int main() { double x = -0x1.62c4d519e8677p+3, y; y = tgamma (x); printf ("x=%a y=%a\n", x, y); } $ gcc -fno-builtin test2.c -lm $ ./a.out x=-0x1.62c4d519e8677p+3 y=0x1.fd63c481c16c9p-23 The correctly rounded result is 0x1.fd63c481c16bfp-23, which is 10 ulps apart. This is larger than the maximum accepted error (9 ulps). -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug math/26983] [x86_64] x86_64 tgamma has too large ULP error 2020-11-30 10:33 [Bug math/26983] New: [x86_64] x86_64 tgamma has too large ULP error zimmerma+gcc at loria dot fr @ 2020-12-01 23:51 ` woodard at redhat dot com 2020-12-07 10:32 ` zimmerma+gcc at loria dot fr ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: woodard at redhat dot com @ 2020-12-01 23:51 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26983 Ben Woodard <woodard at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |woodard at redhat dot com -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug math/26983] [x86_64] x86_64 tgamma has too large ULP error 2020-11-30 10:33 [Bug math/26983] New: [x86_64] x86_64 tgamma has too large ULP error zimmerma+gcc at loria dot fr 2020-12-01 23:51 ` [Bug math/26983] " woodard at redhat dot com @ 2020-12-07 10:32 ` zimmerma+gcc at loria dot fr 2021-04-07 11:33 ` zimmerma+gcc at loria dot fr ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: zimmerma+gcc at loria dot fr @ 2020-12-07 10:32 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26983 --- Comment #1 from Paul Zimmermann <zimmerma+gcc at loria dot fr> --- I also get an error of 10.1539 ulps for the following binary128 input with glibc 2.32: x=-0xf.01a777b2a80518082d6eae96ef98p+0 -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug math/26983] [x86_64] x86_64 tgamma has too large ULP error 2020-11-30 10:33 [Bug math/26983] New: [x86_64] x86_64 tgamma has too large ULP error zimmerma+gcc at loria dot fr 2020-12-01 23:51 ` [Bug math/26983] " woodard at redhat dot com 2020-12-07 10:32 ` zimmerma+gcc at loria dot fr @ 2021-04-07 11:33 ` zimmerma+gcc at loria dot fr 2021-04-07 11:34 ` zimmerma+gcc at loria dot fr 2021-04-07 11:43 ` zimmerma+gcc at loria dot fr 4 siblings, 0 replies; 6+ messages in thread From: zimmerma+gcc at loria dot fr @ 2021-04-07 11:33 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26983 --- Comment #2 from Paul Zimmermann <zimmerma+gcc at loria dot fr> --- and an error of 9.55 ulps (rounding to nearest) for the following long double input (thus 10 ulps from the correctly rounded value): x=-0xb.161d242d4b9282ap+0l -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug math/26983] [x86_64] x86_64 tgamma has too large ULP error 2020-11-30 10:33 [Bug math/26983] New: [x86_64] x86_64 tgamma has too large ULP error zimmerma+gcc at loria dot fr ` (2 preceding siblings ...) 2021-04-07 11:33 ` zimmerma+gcc at loria dot fr @ 2021-04-07 11:34 ` zimmerma+gcc at loria dot fr 2021-04-07 11:43 ` zimmerma+gcc at loria dot fr 4 siblings, 0 replies; 6+ messages in thread From: zimmerma+gcc at loria dot fr @ 2021-04-07 11:34 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26983 --- Comment #3 from Paul Zimmermann <zimmerma+gcc at loria dot fr> --- the binary64 case is fixed by commit 43576de (at least for all known cases with errors larger than 9 ulps) -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug math/26983] [x86_64] x86_64 tgamma has too large ULP error 2020-11-30 10:33 [Bug math/26983] New: [x86_64] x86_64 tgamma has too large ULP error zimmerma+gcc at loria dot fr ` (3 preceding siblings ...) 2021-04-07 11:34 ` zimmerma+gcc at loria dot fr @ 2021-04-07 11:43 ` zimmerma+gcc at loria dot fr 4 siblings, 0 replies; 6+ messages in thread From: zimmerma+gcc at loria dot fr @ 2021-04-07 11:43 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=26983 Paul Zimmermann <zimmerma+gcc at loria dot fr> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|UNCONFIRMED |RESOLVED Target Milestone|--- |2.34 --- Comment #4 from Paul Zimmermann <zimmerma+gcc at loria dot fr> --- cases for ldbl-96 and float128 have been moved to #27707 -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-04-07 11:43 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-11-30 10:33 [Bug math/26983] New: [x86_64] x86_64 tgamma has too large ULP error zimmerma+gcc at loria dot fr 2020-12-01 23:51 ` [Bug math/26983] " woodard at redhat dot com 2020-12-07 10:32 ` zimmerma+gcc at loria dot fr 2021-04-07 11:33 ` zimmerma+gcc at loria dot fr 2021-04-07 11:34 ` zimmerma+gcc at loria dot fr 2021-04-07 11:43 ` zimmerma+gcc at loria dot fr
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