From: Paul Koning <paulkoning@comcast.net>
To: Paul Iannetta <piannetta@kalrayinc.com>
Cc: Andrew Pinski <pinskia@gmail.com>,
Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>,
gcc@gcc.gnu.org
Subject: Re: [RFC] Linux system call builtins
Date: Mon, 8 Apr 2024 16:20:55 -0400 [thread overview]
Message-ID: <685FF2F1-0585-4383-874D-3AE4D1726E7B@comcast.net> (raw)
In-Reply-To: <20240408200138.kbl6n5te2joj3csn@ws2202.lin.mbt.kalray.eu>
> On Apr 8, 2024, at 4:01 PM, Paul Iannetta via Gcc <gcc@gcc.gnu.org> wrote:
>
> On Mon, Apr 08, 2024 at 11:26:40AM -0700, Andrew Pinski wrote:
>> On Mon, Apr 8, 2024 at 11:20 AM Paul Iannetta via Gcc <gcc@gcc.gnu.org> wrote:
>>> ...
>> Also do you sign or zero extend a 32bit argument for LP64 targets?
>> Right now it is not obvious nor documented in your examples.
>>
>
> Another case would be targets allowing an immediate argument for their
> syscall instruction. Sign extend is probably always an error, zero
> extend may give the expected results.
It depends on the ABI. For example, on MIPS, pointers are treated as signed when extending from 32 to 64 bits.
paul
next prev parent reply other threads:[~2024-04-08 20:20 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-08 9:19 Matheus Afonso Martins Moreira
2024-04-08 9:58 ` Jonathan Wakely
2024-04-08 11:59 ` Matheus Afonso Martins Moreira
2024-04-08 14:00 ` Jonathan Wakely
2024-04-08 11:24 ` Florian Weimer
2024-04-08 11:44 ` Alexander Monakov
2024-04-08 11:50 ` Florian Weimer
2024-04-08 13:01 ` Alexander Monakov
2024-04-08 13:37 ` Matheus Afonso Martins Moreira
2024-04-08 18:18 ` Paul Iannetta
2024-04-08 18:26 ` Andrew Pinski
2024-04-08 20:01 ` Paul Iannetta
2024-04-08 20:20 ` Paul Koning [this message]
2024-04-10 1:48 ` Matheus Afonso Martins Moreira
2024-04-10 13:15 ` Paul Koning
2024-04-10 14:10 ` Matheus Afonso Martins Moreira
2024-04-10 1:26 ` Matheus Afonso Martins Moreira
2024-04-08 20:24 ` Paul Floyd
2024-04-10 2:19 ` Matheus Afonso Martins Moreira
2024-04-09 11:45 ` Szabolcs Nagy
2024-04-10 2:59 ` Matheus Afonso Martins Moreira
2024-04-10 11:04 ` Szabolcs Nagy
2024-04-10 14:00 ` Matheus Afonso Martins Moreira
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