From: Joseph Myers <joseph@codesourcery.com>
To: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Cc: <libc-alpha@sourceware.org>, <gabriel@inconstante.eti.br>,
<raji@linux.ibm.com>
Subject: Re: [PATCH 7/9] Refactor math-finite.h and introduce mathcalls-redir.h
Date: Wed, 13 Jun 2018 22:58:00 -0000 [thread overview]
Message-ID: <alpine.DEB.2.20.1806132254160.17472@digraph.polyomino.org.uk> (raw)
In-Reply-To: <878t7icqtd.fsf@linux.ibm.com>
On Wed, 13 Jun 2018, Tulio Magno Quites Machado Filho wrote:
> Yes, I can reproduce it in our tests if I replace -mlong-double-128 with
> -mlong-double-64.
> However, this is not user-visible because this warning is ignored in system
> headers.
>
> Do you still think a bug report is necessary?
I think we want to be clean with -Wsystem-headers; thus, there should be a
bug report.
> > Instead, I'd suggest merging bits/math-finite.h into bits/mathcalls.h as
> > much as possible - have macros such as __MATHCALL_FINITE that are called
> > in bits/mathcalls.h to declare the functions with __*_finite variants, and
> > with __MATHCALL_FINITE defined the same as __MATHCALL when the finite
> > function variants aren't in use. That way you have just a single
> > redirection for each function. (You'll need a sysdeps bits/ header for an
> > architecture, i.e. ia64, to declare it doesn't support the _finite
> > functions at all.)
>
> It doesn't work well this way because we have prototypes with extra attributes,
> e.g:
>
> __MATHDECL_1 (int, totalorder,, (_Mdouble_ __x, _Mdouble_ __y))
> __attribute__ ((__const__));
>
> So, if I do not define __MATHDECL_1 in bits/math-finite.h, this code would end
> up as an invalid code:
>
> __attribute__ ((__const__));
My proposal is that bits/math-finite.h either shouldn't exist or should
end up just defining the lgamma / gamma / tgamma inlines.
bits/mathcalls.h would be included once per type, with the macros
definitions in effect when it's included depending on "defined
__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0" (so if that's true some
functions would be redirected to __*finite versions, if that's false it
would behave much as it does at present).
--
Joseph S. Myers
joseph@codesourcery.com
next prev parent reply other threads:[~2018-06-13 22:58 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-06 22:41 [PATCH 0/9] Introduce ieee128 symbols and redirections Tulio Magno Quites Machado Filho
2018-06-06 22:41 ` [PATCH 4/9] ldbl-128ibm-compat: Add a generic significand() implementation Tulio Magno Quites Machado Filho
2018-06-07 13:38 ` Joseph Myers
2018-06-15 20:16 ` Tulio Magno Quites Machado Filho
2018-06-15 20:20 ` Tulio Magno Quites Machado Filho
2018-06-06 22:41 ` [PATCH 1/9] ldbl-128ibm-compat: Create libm-alias-float128.h Tulio Magno Quites Machado Filho
2018-06-06 23:05 ` Joseph Myers
2018-06-13 20:16 ` Tulio Magno Quites Machado Filho
2018-06-06 22:41 ` [PATCH 2/9] Move declare_mgen_finite_alias definition Tulio Magno Quites Machado Filho
2018-06-07 13:25 ` Joseph Myers
2018-06-06 22:41 ` [PATCH 3/9] ldbl-128ibm-compat: Provide a generic scalb implementation Tulio Magno Quites Machado Filho
2018-06-06 22:42 ` [PATCH 7/9] Refactor math-finite.h and introduce mathcalls-redir.h Tulio Magno Quites Machado Filho
2018-06-06 23:23 ` Joseph Myers
2018-06-13 21:36 ` Tulio Magno Quites Machado Filho
2018-06-13 22:58 ` Joseph Myers [this message]
2018-06-14 18:07 ` Tulio Magno Quites Machado Filho
2018-06-06 22:42 ` [PATCH 6/9] ldbl-128ibm-compat: Provide nexttoward functions Tulio Magno Quites Machado Filho
2018-06-06 22:42 ` [PATCH 8/9] ldbl-128ibm-compat: Redirect long double functions to f128/ieee128 functions Tulio Magno Quites Machado Filho
2018-06-06 22:42 ` [PATCH 5/9] ldbl-128ibm-compat: Provide ISO C functions not provided by the _Float128 API Tulio Magno Quites Machado Filho
2018-06-07 14:51 ` Joseph Myers
2018-06-13 21:41 ` Tulio Magno Quites Machado Filho
2018-06-06 22:43 ` [PATCH 9/9] ldbl-128ibm-compat: Redirect complex math functions Tulio Magno Quites Machado Filho
2018-06-06 23:11 ` [PATCH 0/9] Introduce ieee128 symbols and redirections Joseph Myers
2018-06-13 20:25 ` Tulio Magno Quites Machado Filho
2018-06-13 20:28 ` Joseph Myers
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