This is the mail archive of the libc-alpha@sourceware.org mailing list for the glibc project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [PATCH] Remove alpha specific fmax, fmin to fix sNaN handling [BZ #20947]


On Wed, 3 Jan 2018, Adhemerval Zanella wrote:

> Although the manual I am using (Alpha Architecture Handbook version 3),
> notes that CVTfi OUTPUT Exceptions (B.3 Mapping to IEEE Standard)
> should not generate Inexact, the manual of the chip I am testing it
> (Alpha 21264 [1]) states at A.8 IEEE Floating-Point Conformance that
> CVTfi and CVTif OUTPUT does generate inexact exception for inexact
> result.  I think easier solution is just use generic implementation
> for alpha.

Sure.  Presumably this applies to all of ceil, floor and trunc.  And a GCC 
bug should be filed for inlining those functions on alpha in the default 
-ffp-int-builtin-inexact case which allows the exception to be raised.

-- 
Joseph S. Myers
joseph@codesourcery.com


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]