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6e70d156c7
This patch adds support for libm_alias_ldouble and libm_alias_float128 to create *f64x function aliases when appropriate. Making such aliases work for functions defined in assembly sources requires adding some semicolons after weak_alias calls in alias macro definitions. For C, semicolons are already present in the macros called when required, but a GNU C extension allows excess semicolons at file scope in a source file (and glibc already uses this), so it is OK to have extra semicolons present in the macro definitions. For assembly sources, making multiple alias macro calls from a single macro expansion means there are no newlines between the calls, so an explicit separator is needed. If hppa were to have .S sources in libm, a more complicated approach would be needed that used ASM_LINE_SEP when building assembly sources but not for C, but right now there are no such sources so just using a semicolon (as already present unconditionally in some such macro expansions) suffices. Tested for x86_64, including in conjunction with _Float64x support patches. * sysdeps/generic/libm-alias-float128.h: Include <bits/floatn.h>. (libm_alias_float128_other_r): If [__HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE], define f64x alias. (libm_alias_float128_r): Add semicolon after weak_alias call. * sysdeps/generic/libm-alias-ldouble.h (libm_alias_ldouble_other_r_f128): New macro. (libm_alias_ldouble_other_r_f64x): Likewise. (libm_alias_ldouble_other_r): Use libm_alias_ldouble_other_r_f128 and libm_alias_ldouble_other_r_f64x. (libm_alias_ldouble_r): Add semicolon after weak_alias call. * sysdeps/ieee754/ldbl-opt/libm-alias-ldouble.h (libm_alias_ldouble_other_r_f128): New macro. (libm_alias_ldouble_other_r_f64x): Likewise. (libm_alias_ldouble_other_r): Use libm_alias_ldouble_other_r_f128 and libm_alias_ldouble_other_r_f64x.
66 lines
2.6 KiB
C
66 lines
2.6 KiB
C
/* Define aliases for libm long double functions.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _LIBM_ALIAS_LDOUBLE_H
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#define _LIBM_ALIAS_LDOUBLE_H
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#include <bits/floatn.h>
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#if __HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128
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# define libm_alias_ldouble_other_r_f128(from, to, r) \
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weak_alias (from ## l ## r, to ## f128 ## r)
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#else
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# define libm_alias_ldouble_other_r_f128(from, to, r)
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#endif
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#if __HAVE_FLOAT64X_LONG_DOUBLE
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# define libm_alias_ldouble_other_r_f64x(from, to, r) \
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weak_alias (from ## l ## r, to ## f64x ## r)
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#else
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# define libm_alias_ldouble_other_r_f64x(from, to, r)
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#endif
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/* Define _FloatN / _FloatNx aliases for a long double libm function
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that has internal name FROM ## l ## R and public names TO ## suffix
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## R for each suffix of a supported _FloatN / _FloatNx
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floating-point type with the same format as long double. */
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#define libm_alias_ldouble_other_r(from, to, r) \
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libm_alias_ldouble_other_r_f128 (from, to, r); \
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libm_alias_ldouble_other_r_f64x (from, to, r)
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/* Likewise, but without the R suffix. */
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#define libm_alias_ldouble_other(from, to) \
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libm_alias_ldouble_other_r (from, to, )
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/* Define aliases for a long double libm function that has internal
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name FROM ## l ## R and public names TO ## suffix ## R for each
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suffix of a supported floating-point type with the same format as
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long double. This should only be used for functions where such
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public names exist for _FloatN types, not for
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implementation-namespace exported names (where there is one name
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per format, not per type) or for obsolescent functions not provided
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for _FloatN types. */
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#define libm_alias_ldouble_r(from, to, r) \
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weak_alias (from ## l ## r, to ## l ## r); \
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libm_alias_ldouble_other_r (from, to, r)
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/* Likewise, but without the R suffix. */
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#define libm_alias_ldouble(from, to) libm_alias_ldouble_r (from, to, )
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#endif
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