public inbox for glibc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug math/19079] New: dbl-64/wordsize-64 lround based on llround incorrect for ILP32
Date: Tue, 06 Oct 2015 23:36:00 -0000 [thread overview]
Message-ID: <bug-19079-131@http.sourceware.org/bugzilla/> (raw)
https://sourceware.org/bugzilla/show_bug.cgi?id=19079
Bug ID: 19079
Summary: dbl-64/wordsize-64 lround based on llround incorrect
for ILP32
Product: glibc
Version: 2.22
Status: NEW
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: jsm28 at gcc dot gnu.org
Target Milestone: ---
The implementation of lround in dbl-64/wordsize-64 as an alias or wrapper for
llround is always incorrect when long is not 64-bit, because it misses required
exceptions in overflow cases. E.g., for MIPS n32 modified to use this code:
Failure: lround (0x1p31): Exception "Invalid operation" not set
Failure: lround (0x1p32): Exception "Invalid operation" not set
Failure: lround (0x1p33): Exception "Invalid operation" not set
Failure: lround (-0x1p32): Exception "Invalid operation" not set
Failure: lround (-0x1p33): Exception "Invalid operation" not set
Failure: lround (-0x1p63): Exception "Invalid operation" not set
Failure: lround_downward (0x1p31): Exception "Invalid operation" not set
Failure: lround_downward (0x1p32): Exception "Invalid operation" not set
Failure: lround_downward (0x1p33): Exception "Invalid operation" not set
Failure: lround_downward (-0x1p32): Exception "Invalid operation" not set
Failure: lround_downward (-0x1p33): Exception "Invalid operation" not set
Failure: lround_downward (-0x1p63): Exception "Invalid operation" not set
Failure: lround_towardzero (0x1p31): Exception "Invalid operation" not set
Failure: lround_towardzero (0x1p32): Exception "Invalid operation" not set
Failure: lround_towardzero (0x1p33): Exception "Invalid operation" not set
Failure: lround_towardzero (-0x1p32): Exception "Invalid operation" not set
Failure: lround_towardzero (-0x1p33): Exception "Invalid operation" not set
Failure: lround_towardzero (-0x1p63): Exception "Invalid operation" not set
Failure: lround_upward (0x1p31): Exception "Invalid operation" not set
Failure: lround_upward (0x1p32): Exception "Invalid operation" not set
Failure: lround_upward (0x1p33): Exception "Invalid operation" not set
Failure: lround_upward (-0x1p32): Exception "Invalid operation" not set
Failure: lround_upward (-0x1p33): Exception "Invalid operation" not set
Failure: lround_upward (-0x1p63): Exception "Invalid operation" not set
--
You are receiving this mail because:
You are on the CC list for the bug.
next reply other threads:[~2015-10-06 23:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-06 23:36 jsm28 at gcc dot gnu.org [this message]
2015-10-07 0:41 ` [Bug math/19079] " cvs-commit at gcc dot gnu.org
2015-10-07 0:41 ` jsm28 at gcc dot gnu.org
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=bug-19079-131@http.sourceware.org/bugzilla/ \
--to=sourceware-bugzilla@sourceware.org \
--cc=glibc-bugs@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).