From: Jan Beulich <jbeulich@suse.com>
To: Nelson Chu <nelson@rivosinc.com>, im Kiva <libkernelpanic@gmail.com>
Cc: binutils@sourceware.org
Subject: Re: [RISCV] [GNU AS] Possible `vmsge{u}.vx` instruction lowering bug?
Date: Tue, 29 Aug 2023 10:52:50 +0200 [thread overview]
Message-ID: <d2256077-a9cf-ec6e-f8d6-ef9d26c88d9c@suse.com> (raw)
In-Reply-To: <CAPpQWtCUcNzTH3UtoD1UGcrWbhjSLiUbq29p125Ba1JGq0Bkdg@mail.gmail.com>
On 29.08.2023 09:59, Nelson Chu wrote:
> Is the following expected?
I think so, but Kiva - please confirm.
> Seems "vd is any" also has the same issue.
Right, that's what ...
>> I think this wants fixing alike in binutils: From looking at
>> vector_macro(),
>> it appears that emitting the masked form is merely an accident resulting
>> from the inverted encoding of "masking". In particular, if masking was
>> indeed meant, I expect code there would be
>>
>> if (vd == vm)
>> {
>> macro_build (NULL, "vmslt.vx", "Vd,Vt,sVm", vtemp,
>> vs2, vs1, vm);
>> macro_build (NULL, "vmandnot.mm", "Vd,Vt,Vs", vd,
>> vm, vtemp);
>> }
>> else
>> ...
>>
>> much like it is a few lines down from there. (Apparently the "else" path
>> omitted above is similarly affected.)
... I was referring to with the parenthesized sentence.
Jan
next prev parent reply other threads:[~2023-08-29 8:52 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-29 6:52 im Kiva
2023-08-29 7:43 ` Jan Beulich
2023-08-29 7:59 ` Nelson Chu
2023-08-29 8:52 ` Jan Beulich [this message]
2023-08-30 2:51 ` Nelson Chu
2023-08-30 5:50 ` Jan Beulich
2023-09-01 6:37 ` Kiva Oyama
2023-09-01 8:03 ` Nelson Chu
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