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[Bug math/16284] New: Bad overflowing exp results for directed rounding
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Mon, 02 Dec 2013 18:49:14 +0000
- Subject: [Bug math/16284] New: Bad overflowing exp results for directed rounding
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=16284
Bug ID: 16284
Summary: Bad overflowing exp results for directed rounding
Product: glibc
Version: 2.19
Status: NEW
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: jsm28 at gcc dot gnu.org
When rounding to zero or downward, overflowing results of exp should be the
largest finite value, not infinity. The sysdeps/ieee754/dbl-64 exp
implementation, on x86_64, at least, returns infinity, e.g.
testing double (without inline functions)
Failure: Test: exp_towardzero (0x1.86ap+16)
Result:
is: inf inf
should be: 1.79769313486231570814e+308 0x1.fffffffffffff0000000p+1023
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