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015c6dc288
Further _FloatN / _FloatNx type alias support will involve making architecture-specific .S files use the common macros for libm function aliases. Making them use those macros will also serve to simplify existing code for aliases / symbol versions in various cases, similar to such simplifications for ldbl-opt code. The libm-alias-*.h files sometimes need to include <bits/floatn.h> to determine which aliases they should define. At present, this does not work for inclusion from .S files because <bits/floatn.h> can define typedefs for old compilers. This patch changes all the <bits/floatn.h> and <bits/floatn-common.h> headers to include __ASSEMBLER__ conditionals. Those conditionals disable everything related to C syntax in the __ASSEMBLER__ case, not just the problem typedefs, as that seemed cleanest. The __HAVE_* definitions remain in the __ASSEMBLER__ case, as those provide information that is required to define the correct set of aliases. Tested with build-many-glibcs.py for a representative set of configurations (x86_64-linux-gnu i686-linux-gnu ia64-linux-gnu powerpc64le-linux-gnu mips64-linux-gnu-n64 sparc64-linux-gnu) with GCC 6. Also tested with GCC 6 for i686-linux-gnu in conjunction with changes to use alias macros in .S files. * bits/floatn-common.h [!__ASSEMBLER]: Disable everything related to C syntax instead of availability and properties of types. * bits/floatn.h [!__ASSEMBLER]: Likewise. * sysdeps/ia64/bits/floatn.h [!__ASSEMBLER]: Likewise. * sysdeps/ieee754/ldbl-128/bits/floatn.h [!__ASSEMBLER]: Likewise. * sysdeps/mips/ieee754/bits/floatn.h [!__ASSEMBLER]: Likewise. * sysdeps/powerpc/bits/floatn.h [!__ASSEMBLER]: Likewise. * sysdeps/x86/bits/floatn.h [!__ASSEMBLER]: Likewise.
109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/* Macros to control TS 18661-3 glibc features on ia64.
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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 _BITS_FLOATN_H
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#define _BITS_FLOATN_H
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#include <features.h>
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/* Defined to 1 if the current compiler invocation provides a
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floating-point type with the IEEE 754 binary128 format, and this
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glibc includes corresponding *f128 interfaces for it. The required
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libgcc support was added some time after the basic compiler
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support. */
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#if __GNUC_PREREQ (4, 4)
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# define __HAVE_FLOAT128 1
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#else
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# define __HAVE_FLOAT128 0
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#endif
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/* Defined to 1 if __HAVE_FLOAT128 is 1 and the type is ABI-distinct
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from the default float, double and long double types in this glibc. */
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#if __HAVE_FLOAT128
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# define __HAVE_DISTINCT_FLOAT128 1
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#else
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# define __HAVE_DISTINCT_FLOAT128 0
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#endif
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#ifndef __ASSEMBLER__
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/* Defined to concatenate the literal suffix to be used with _Float128
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types, if __HAVE_FLOAT128 is 1. */
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# if __HAVE_FLOAT128
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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/* The literal suffix f128 exists only since GCC 7.0. */
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# define __f128(x) x##q
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# else
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# define __f128(x) x##f128
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# endif
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# endif
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/* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1. */
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# if __HAVE_FLOAT128
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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/* Add a typedef for older GCC compilers which don't natively support
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_Complex _Float128. */
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typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__TC__)));
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# define __CFLOAT128 __cfloat128
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# else
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# define __CFLOAT128 _Complex _Float128
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# endif
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# endif
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/* The remaining of this file provides support for older compilers. */
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# if __HAVE_FLOAT128
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/* The type _Float128 exists only since GCC 7.0. */
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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typedef __float128 _Float128;
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# endif
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/* __builtin_huge_valf128 doesn't exist before GCC 7.0. */
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
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# endif
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/* Older GCC has only a subset of built-in functions for _Float128 on
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ia64, and __builtin_infq is not usable in static initializers.
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Converting a narrower sNaN to _Float128 produces a quiet NaN, so
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attempts to use _Float128 sNaNs will not work properly with older
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compilers. */
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_copysignf128 __builtin_copysignq
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# define __builtin_fabsf128 __builtin_fabsq
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# define __builtin_inff128() ((_Float128) __builtin_inf ())
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# define __builtin_nanf128(x) ((_Float128) __builtin_nan (x))
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# define __builtin_nansf128(x) ((_Float128) __builtin_nans (x))
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# endif
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/* In math/math.h, __MATH_TG will expand signbit to __builtin_signbit*,
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e.g.: __builtin_signbitf128, before GCC 6. However, there has never
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been a __builtin_signbitf128 in GCC and the type-generic builtin is
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only available since GCC 6. */
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# if !__GNUC_PREREQ (6, 0)
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# define __builtin_signbitf128 __signbitf128
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# endif
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# endif
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#endif /* !__ASSEMBLER__. */
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#include <bits/floatn-common.h>
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#endif /* _BITS_FLOATN_H */
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