From: Carlos O'Donell <carlos@redhat.com>
To: Adhemerval Zanella <adhemerval.zanella@linaro.org>,
libc-alpha@sourceware.org, Bruno Haible <bruno@clisp.org>
Subject: Re: [PATCH v2 4/7] manual: Clarify undefined behavior of feenableexcept (BZ 31019)
Date: Mon, 6 Nov 2023 11:17:17 -0500 [thread overview]
Message-ID: <c6329663-148e-f696-5518-22c09c9e42d4@redhat.com> (raw)
In-Reply-To: <20231106132713.953501-5-adhemerval.zanella@linaro.org>
On 11/6/23 08:27, Adhemerval Zanella wrote:
> From: Bruno Haible <bruno@clisp.org>
>
> Explain undefined behavior of feenableexcept in a special case.
LGTM.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
> ---
> manual/arith.texi | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/manual/arith.texi b/manual/arith.texi
> index fa7110e992..be24c20493 100644
> --- a/manual/arith.texi
> +++ b/manual/arith.texi
> @@ -1176,6 +1176,12 @@ enabled, the status of the other exceptions is not changed.
>
> The function returns the previous enabled exceptions in case the
> operation was successful, @code{-1} otherwise.
> +
> +Note: Enabling traps for an exception for which the exception flag is
> +currently already set (@pxref{Status bit operations}) has unspecified
> +consequences: it may or may not trigger a trap immediately.
Agreed.
> +@c It triggers a trap immediately on powerpc*, at the next floating-
> +@c instruction on i386, and not at all on the other CPUs.
> @end deftypefun
>
> @deftypefun int fedisableexcept (int @var{excepts})
--
Cheers,
Carlos.
next prev parent reply other threads:[~2023-11-06 16:17 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-06 13:27 [PATCH v2 0/7] Multiple floating-point environment fixes Adhemerval Zanella
2023-11-06 13:27 ` [PATCH v2 1/7] powerpc: Do not raise exception traps for fesetexcept/fesetexceptflag (BZ 30988) Adhemerval Zanella
2023-11-06 16:08 ` Carlos O'Donell
2023-11-06 16:50 ` Adhemerval Zanella Netto
2023-11-06 17:02 ` Carlos O'Donell
2023-11-06 17:11 ` Adhemerval Zanella Netto
2023-11-06 17:37 ` Adhemerval Zanella Netto
2023-11-06 17:38 ` Carlos O'Donell
2023-11-06 17:56 ` Adhemerval Zanella Netto
2023-11-06 20:46 ` Adhemerval Zanella Netto
2023-11-23 21:47 ` Carlos O'Donell
2023-11-24 12:28 ` Adhemerval Zanella Netto
2023-11-24 12:37 ` Adhemerval Zanella Netto
2023-11-24 16:22 ` Carlos O'Donell
2023-11-24 17:53 ` Adhemerval Zanella Netto
2023-11-24 18:15 ` Carlos O'Donell
2023-11-24 18:46 ` Adhemerval Zanella Netto
2023-11-27 13:46 ` Adhemerval Zanella Netto
2023-12-19 14:57 ` Carlos O'Donell
2023-11-06 13:27 ` [PATCH v2 2/7] i686: Do not raise exception traps on fesetexcept (BZ 30989) Adhemerval Zanella
2023-11-06 16:14 ` Carlos O'Donell
2023-11-06 13:27 ` [PATCH v2 3/7] x86: Do not raises floating-point exception traps on fesetexceptflag (BZ 30990) Adhemerval Zanella
2023-11-06 16:16 ` Carlos O'Donell
2023-11-06 13:27 ` [PATCH v2 4/7] manual: Clarify undefined behavior of feenableexcept (BZ 31019) Adhemerval Zanella
2023-11-06 16:17 ` Carlos O'Donell [this message]
2023-11-06 13:27 ` [PATCH v2 5/7] riscv: Fix feenvupdate with FE_DFL_ENV (BZ 31022) Adhemerval Zanella
2023-11-06 16:19 ` Carlos O'Donell
2023-11-06 13:27 ` [PATCH v2 6/7] alpha: Fix fesetexceptflag (BZ 30998) Adhemerval Zanella
2023-11-06 16:54 ` Carlos O'Donell
2023-11-06 17:36 ` Bruno Haible
2023-11-06 18:15 ` Carlos O'Donell
2023-11-06 13:27 ` [PATCH v2 7/7] hppa: Fix undefined behaviour in feclearexcept (BZ 30983) Adhemerval Zanella
2023-11-06 16:57 ` Carlos O'Donell
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