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From: "zimmerma+gcc at loria dot fr" <sourceware-bugzilla@sourceware.org> To: glibc-bugs@sourceware.org Subject: [Bug math/26982] New: [x86_64] x86_64 lgamma has too large ULP error Date: Mon, 30 Nov 2020 10:27:23 +0000 [thread overview] Message-ID: <bug-26982-131@http.sourceware.org/bugzilla/> (raw) https://sourceware.org/bugzilla/show_bug.cgi?id=26982 Bug ID: 26982 Summary: [x86_64] x86_64 lgamma 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 test.c #include <stdio.h> #include <math.h> int main() { double x = -0x1.f60c969a239f2p+1, y; y = lgamma (x); printf ("x=%a y=%a\n", x, y); } $ gcc -fno-builtin test.c -lm $ ./a.out x=-0x1.f60c969a239f2p+1 y=-0x1.fd3d359162ae4p-2 The correctly rounded result is -0x1.fd3d359162adap-2, thus the error is 10 ulps, which is larger than the maximum accepted limit of 9 ulps. -- You are receiving this mail because: You are on the CC list for the bug.
next reply other threads:[~2020-11-30 10:27 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-11-30 10:27 zimmerma+gcc at loria dot fr [this message] 2020-12-01 23:51 ` [Bug math/26982] " woodard at redhat dot com 2020-12-04 17:29 ` zimmerma+gcc at loria dot fr 2021-01-05 14:57 ` zimmerma+gcc at loria dot fr
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