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Define and use libm_alias_float128.

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Continuing the process of setting up common macros for libm function
aliases, with a view to using them to define _FloatN / _FloatNx
aliases in future, this patch adds a libm_alias_float128 macro and
uses it in the type-generic templates.  (_Float128 functions will end
up with _Float64x aliases on powerpc64le, but not on x86_64/x86/ia64
because _Float64x has long double format there, and the macro will
provide a single place for the conditionals for that choice, as well
as for once ldbl-128 functions always build *f128 and need
conditionals for whether to have *l aliases.)

Tested for x86_64.  Also tested with build-many-glibcs.py that
installed stripped shared libraries are unchanged by the patch.

	* sysdeps/generic/libm-alias-float128.h: New file.
	* sysdeps/generic/math-type-macros-float128.h: Include
	<libm-alias-float128.h>.
	[!declare_mgen_alias] (declare_mgen_alias): Define macro.
This commit is contained in:
Joseph Myers 2017-09-14 01:11:46 +00:00
parent 1aae75ef80
commit 02093e6222
3 changed files with 48 additions and 0 deletions

7
ChangeLog

@ -1,3 +1,10 @@
2017-09-14 Joseph Myers <joseph@codesourcery.com>
* sysdeps/generic/libm-alias-float128.h: New file.
* sysdeps/generic/math-type-macros-float128.h: Include
<libm-alias-float128.h>.
[!declare_mgen_alias] (declare_mgen_alias): Define macro.
2017-09-13 Joseph Myers <joseph@codesourcery.com>
* sysdeps/generic/libm-alias-ldouble.h: New file.

36
sysdeps/generic/libm-alias-float128.h Normal file

@ -0,0 +1,36 @@
/* Define aliases for libm _Float128 functions.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _LIBM_ALIAS_FLOAT128_H
#define _LIBM_ALIAS_FLOAT128_H
/* Define aliases for a _Float128 libm function that has internal name
FROM ## f128 ## R and public names TO ## suffix ## R for each
suffix of a supported floating-point type with the same format as
_Float128. This should only be used for functions where such
public names exist for _FloatN types, not for
implementation-namespace exported names (where there is one name
per format, not per type) or for obsolescent functions not provided
for _FloatN types. */
#define libm_alias_float128_r(from, to, r) \
weak_alias (from ## f128 ## r, to ## f128 ## r)
/* Likewise, but without the R suffix. */
#define libm_alias_float128(from, to) libm_alias_float128_r (from, to, )
#endif

5
sysdeps/generic/math-type-macros-float128.h

@ -32,6 +32,11 @@
#define M_MLIT(c) c ## f128
#include <libm-alias-float128.h>
#ifndef declare_mgen_alias
# define declare_mgen_alias(from, to) libm_alias_float128 (from, to)
#endif
/* Supply the generic macros. */
#include <math-type-macros.h>