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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/108742] Incorrect constant folding with (or exposed by) -fexcess-precision=standard
Date: Thu, 09 Feb 2023 16:10:30 +0000	[thread overview]
Message-ID: <bug-108742-4-1AWum6Ns6E@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-108742-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108742

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Note, internally in standard excess precision, 4.2 seen by the lexer is
actually
EXCESS_PRECISION <double, 4.2L>, when it is assigned to a double variable or
cast
to double (i.e. in places where C/C++ require the excess precision to be
converted to the narrower one) it is rounded to double, but when used as (long
double)4.2 it is
the same as 4.2L and even (long double)d == (long double)4.2 should behave the
same
as (long double)d == 4.2 and d == 4.2.

  parent reply	other threads:[~2023-02-09 16:10 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-09 15:50 [Bug middle-end/108742] New: " matz at gcc dot gnu.org
2023-02-09 15:56 ` [Bug middle-end/108742] " marxin at gcc dot gnu.org
2023-02-09 16:06 ` [Bug target/108742] " jakub at gcc dot gnu.org
2023-02-09 16:10 ` jakub at gcc dot gnu.org [this message]
2023-02-09 16:19 ` matz at gcc dot gnu.org
2023-02-09 16:25 ` jakub at gcc dot gnu.org
2023-02-09 16:31 ` jakub at gcc dot gnu.org
2023-02-09 16:34 ` jakub at gcc dot gnu.org
2023-02-09 16:52 ` matz at gcc dot gnu.org
2023-02-09 17:00 ` matz at gcc dot gnu.org
2023-02-09 17:01 ` jakub at gcc dot gnu.org
2023-02-09 17:13 ` matz at gcc dot gnu.org
2023-02-09 17:26 ` joseph at codesourcery dot com
2023-06-29  8:04 ` pinskia at gcc dot gnu.org
2023-06-29 10:59 ` pdimov at gmail dot com
2023-06-30  7:28 ` mkretz at gcc dot gnu.org
2023-06-30  7:36 ` jakub at gcc dot gnu.org

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