From: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
To: Daniel Cederman <cederman@gaisler.com>, libc-alpha@sourceware.org
Cc: daniel@gaisler.com, andreas@gaisler.com
Subject: Re: [PATCH] sparc: Treat the version field in the FPU control word as reserved
Date: Fri, 12 Jan 2024 14:42:15 -0300 [thread overview]
Message-ID: <74d588e4-69cc-4f66-924a-029ae257776c@linaro.org> (raw)
In-Reply-To: <20240112092628.2464455-4-cederman@gaisler.com>
On 12/01/24 06:26, Daniel Cederman wrote:
> The FSR version field is read-only and might be non-zero.
>
> This allows math/test-fpucw* to correctly pass when the version is
> non-zero.
>
> Signed-off-by: Daniel Cederman <cederman@gaisler.com>
It looks reasonable to mask off the version _FPU_RESERVED. It also
means that it would be change by __setfpucw, although afaik the ISA
guarantee that it can not be changed anyway.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
> ---
> sysdeps/sparc/fpu/fpu_control.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/sysdeps/sparc/fpu/fpu_control.h b/sysdeps/sparc/fpu/fpu_control.h
> index 9313743f86..36a2bf5d07 100644
> --- a/sysdeps/sparc/fpu/fpu_control.h
> +++ b/sysdeps/sparc/fpu/fpu_control.h
> @@ -42,7 +42,7 @@
> #define _FPU_RC_ZERO 0x40000000
> #define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */
>
> -#define _FPU_RESERVED 0x30300000 /* Reserved bits in cw */
> +#define _FPU_RESERVED 0x303e0000 /* Reserved bits in cw */
>
>
> /* Now two recommended cw */
next prev parent reply other threads:[~2024-01-12 17:42 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-12 9:26 [PATCH] sparc: Do not test preservation of NaN payloads for LEON Daniel Cederman
2024-01-12 9:26 ` [PATCH] sparc: Prevent stfsr from directly following floating-point instruction Daniel Cederman
2024-01-12 14:38 ` Adhemerval Zanella Netto
2024-01-15 9:37 ` Daniel Cederman
2024-01-12 9:26 ` [PATCH] sparc: Force calculation that raises exception Daniel Cederman
2024-01-12 16:45 ` Adhemerval Zanella Netto
2024-01-15 9:41 ` Daniel Cederman
2024-01-15 11:47 ` Adhemerval Zanella Netto
2024-01-12 9:26 ` [PATCH] sparc: Treat the version field in the FPU control word as reserved Daniel Cederman
2024-01-12 17:42 ` Adhemerval Zanella Netto [this message]
2024-02-15 9:31 ` Daniel Cederman
2024-02-19 14:55 ` Adhemerval Zanella Netto
2024-01-12 9:26 ` [PATCH] sparc: Fix llrint and llround missing exceptions on SPARC32 Daniel Cederman
2024-01-12 18:05 ` Adhemerval Zanella Netto
2024-01-15 14:38 ` Daniel Cederman
2024-01-15 17:52 ` Adhemerval Zanella Netto
2024-01-12 9:26 ` [PATCH] sparc: Remove unwind information from signal return stub functions Daniel Cederman
2024-01-15 13:41 ` Adhemerval Zanella Netto
2024-01-15 14:22 ` Daniel Cederman
2024-01-15 16:57 ` Adhemerval Zanella Netto
2024-01-16 15:37 ` [PATCH] sparc: Do not test preservation of NaN payloads for LEON Adhemerval Zanella Netto
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=74d588e4-69cc-4f66-924a-029ae257776c@linaro.org \
--to=adhemerval.zanella@linaro.org \
--cc=andreas@gaisler.com \
--cc=cederman@gaisler.com \
--cc=daniel@gaisler.com \
--cc=libc-alpha@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).