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From: "patrick.mcgehearty at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/101104] test case gcc.c-torture/execute/ieee/cdivchkld.c
 fails
Date: Fri, 30 Jul 2021 16:32:24 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101104

--- Comment #3 from Patrick McGehearty <patrick.mcgehearty at oracle dot co=
m> ---
I meant to say "IF mode" instead of KF mode.
Shall I resubmit with that correction?

- patrick

On 7/20/2021 5:46 PM, segher at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101104
>
> Segher Boessenkool <segher at gcc dot gnu.org> changed:
>
>             What    |Removed                     |Added
> -------------------------------------------------------------------------=
---
>                   CC|                            |segher at gcc dot gnu.o=
rg
>            Component|testsuite                   |target
>
> --- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
> (In reply to Patrick McGehearty from comment #1)
>> I identified the root cause as not fully understanding the IBM native
>> format. The gcc internal representation uses KF mode for IBM 128-bit
>> floating point.
> KFmode is IEEE QP float.  IFmode is double-double, "IBM extended double",
> a pair of DP float numbers (with some rules, not every pair is valid).
>
> TFmode is one of those.
>=