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[Bug math/16526] New: Missing underflow exception from sincos
- From: "zimmerma+gcc at loria dot fr" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Tue, 04 Feb 2014 20:39:11 +0000
- Subject: [Bug math/16526] New: Missing underflow exception from sincos
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=16526
Bug ID: 16526
Summary: Missing underflow exception from sincos
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: zimmerma+gcc at loria dot fr
on x86_64 we get (where sincos1 compute the sine using the sincos function):
Testing function sincos1 for exponent 0 [seed=1823].
rounding mode MPFR_RNDN:
wrong underflow flag for x=4.0000000000000@-269
library gives 4.0000000000000@-269
mpfr gives 4.0000000000000@-269
underflow: mpfr 1, library 0
Since 4.0000000000000@-269 = 0x1p-1074 is the smallest subnormal, an underflow
exception should be raised.
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