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[Bug soft-fp/16034] New: soft-fp negation quiets signaling NaNs
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Wed, 09 Oct 2013 19:35:50 +0000
- Subject: [Bug soft-fp/16034] New: soft-fp negation quiets signaling NaNs
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=16034
Bug ID: 16034
Summary: soft-fp negation quiets signaling NaNs
Product: glibc
Version: 2.18
Status: NEW
Severity: normal
Priority: P2
Component: soft-fp
Assignee: unassigned at sourceware dot org
Reporter: jsm28 at gcc dot gnu.org
CC: joseph at codesourcery dot com
The soft-fp __neg* functions use cooked unpacking and packing, meaning that
signaling NaNs wrongly get converted to quiet NaNs (although they take care to
avoid raising the "invalid" exception). (This isn't readily visible in that
GCC will typically expand negation inline for soft-float rather than using
these functions at all.)
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