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eda162dd8a
math.h has a macro _Mlong_double_ for the type to use when declaring
long double functions, and similar macros for other types.
math/Makefile uses -D_Mlong_double_=double in the case of long double
having the same ABI as double.
This originates with:
Mon Jul 8 13:37:40 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* math/math.h (_Mfloat_, _Mlong_double_): New macros, defined iff not
already defined to float, long double. Use those macros for _Mdouble_
defns when including mathcalls.h.
* math/Makefile [$(long-double-fcts) != yes] (CPPFLAGS): Append
-D_Mlong_double_=double.
However, math.h stopped declaring long double functions in the case of
long double having the same ABI as double (and thus probably stopped
actually needing the Makefile definition of _Mlong_double_) with:
1998-11-05 Ulrich Drepper <drepper@cygnus.com>
* math/math.h: Unconditionally include bits/mathdef.h. Declare
long double functions only if __NO_LONG_DOUBLE_MATH is not
defined.
* sysdeps/generic/bits/mathdef.h: Define only if __USE_ISOC9X.
Define __NO_LONG_DOUBLE_MATH.
* sysdeps/m68k/fpu/bits/mathdef.h: Define only if __USE_ISOC9X.
* sysdeps/i386/fpu/bits/mathdef.h: Likewise.
The declarations were since restored for compiling user code, but
remain absent when _LIBC is defined, which is sufficient to avoid
problems declaring function aliases of incompatible types. Thus the
indirection through the _Mlong_double_ macro is not needed (probably
since that 1998 patch), and this patch removes _Mlong_double_ and
associated macros for other types, leaving only the macro _Mdouble_
which is actually used as the type for which a given inclusion of
<bits/mathcalls.h> should declared functions.
Tested for x86_64, and tested with build-many-glibcs.py that installed
stripped shared libraries are unchanged by this patch.
* math/math.h [!_Mfloat_] (_Mfloat_): Do not define.
[!_Mlong_double_] (_Mlong_double_): Likewise.
[!_Mfloat16_] (_Mfloat16_): Likewise.
[!_Mfloat32_] (_Mfloat32_): Likewise.
[!_Mfloat64_] (_Mfloat64_): Likewise.
[!_Mfloat128_] (_Mfloat128_): Likewise.
[!_Mfloat32x_] (_Mfloat32x_): Likewise.
[!_Mfloat64x_] (_Mfloat64x_): Likewise.
[!_Mfloat128x_] (_Mfloat128x_): Likewise.
(_Mdouble_): Define without indirection through those macros.
* math/complex.h [!_Mfloat_] (_Mfloat_): Do not define.
[!_Mfloat128_] (_Mfloat128_): Likewise.
[_Mlong_double_] (_Mlong_double_): Likewise.
(_Mdouble_): Define without indirection through those macros.
* math/Makefile [$(long-double-fcts) != yes] (math-CPPFLAGS): Do
not add -D_Mlong_double_=double.
* include/math.h [_ISOMAC] (_Mlong_double_): Do not undefine.
* math/test-signgam-finite-c99.c (_Mlong_double_): Likewise.
130 lines
4.2 KiB
C
130 lines
4.2 KiB
C
/* Copyright (C) 1997-2017 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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/*
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* ISO C99: 7.3 Complex arithmetic <complex.h>
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*/
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#ifndef _COMPLEX_H
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#define _COMPLEX_H 1
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#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
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#include <bits/libc-header-start.h>
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/* Get general and ISO C99 specific information. */
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#include <bits/mathdef.h>
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/* Gather machine-dependent _FloatN type support. */
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#include <bits/floatn.h>
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__BEGIN_DECLS
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/* We might need to add support for more compilers here. But since ISO
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C99 is out hopefully all maintained compilers will soon provide the data
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types `float complex' and `double complex'. */
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#if __GNUC_PREREQ (2, 7) && !__GNUC_PREREQ (2, 97)
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# define _Complex __complex__
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#endif
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#define complex _Complex
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/* Narrowest imaginary unit. This depends on the floating-point
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evaluation method.
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XXX This probably has to go into a gcc related file. */
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#define _Complex_I (__extension__ 1.0iF)
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/* Another more descriptive name is `I'.
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XXX Once we have the imaginary support switch this to _Imaginary_I. */
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#undef I
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#define I _Complex_I
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#if defined __USE_ISOC11 && __GNUC_PREREQ (4, 7)
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/* Macros to expand into expression of specified complex type. */
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# define CMPLX(x, y) __builtin_complex ((double) (x), (double) (y))
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# define CMPLXF(x, y) __builtin_complex ((float) (x), (float) (y))
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# define CMPLXL(x, y) __builtin_complex ((long double) (x), (long double) (y))
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#endif
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#if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
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# define CMPLXF128(x, y) __builtin_complex ((_Float128) (x), (_Float128) (y))
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#endif
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/* The file <bits/cmathcalls.h> contains the prototypes for all the
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actual math functions. These macros are used for those prototypes,
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so we can easily declare each function as both `name' and `__name',
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and can declare the float versions `namef' and `__namef'. */
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#define __MATHCALL(function, args) \
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__MATHDECL (_Mdouble_complex_,function, args)
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#define __MATHDECL(type, function, args) \
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__MATHDECL_1(type, function, args); \
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__MATHDECL_1(type, __CONCAT(__,function), args)
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#define __MATHDECL_1(type, function, args) \
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extern type __MATH_PRECNAME(function) args __THROW
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#define _Mdouble_ double
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#define __MATH_PRECNAME(name) name
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#include <bits/cmathcalls.h>
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#undef _Mdouble_
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#undef __MATH_PRECNAME
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/* Now the float versions. */
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#define _Mdouble_ float
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#define __MATH_PRECNAME(name) name##f
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#include <bits/cmathcalls.h>
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#undef _Mdouble_
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#undef __MATH_PRECNAME
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#if (__HAVE_DISTINCT_FLOAT128 || (__HAVE_FLOAT128 && !defined _LIBC)) \
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&& __GLIBC_USE (IEC_60559_TYPES_EXT)
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/* GCC < 7 requires extra convincing to expose a complex float128 type. */
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# ifdef __CFLOAT128
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# undef _Mdouble_complex_
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# define _Mdouble_complex_ __CFLOAT128
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# endif
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# define _Mdouble_ _Float128
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# define __MATH_PRECNAME(name) name##f128
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# include <bits/cmathcalls.h>
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# undef _Mdouble_
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# undef __MATH_PRECNAME
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# undef _Mdouble_complex_
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#endif
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/* And the long double versions. It is non-critical to define them
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here unconditionally since `long double' is required in ISO C99. */
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#if !(defined __NO_LONG_DOUBLE_MATH && defined _LIBC) \
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|| defined __LDBL_COMPAT
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# ifdef __LDBL_COMPAT
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# undef __MATHDECL_1
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# define __MATHDECL_1(type, function, args) \
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extern type __REDIRECT_NTH(__MATH_PRECNAME(function), args, function)
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# endif
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# define _Mdouble_ long double
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# define __MATH_PRECNAME(name) name##l
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# include <bits/cmathcalls.h>
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#endif
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#undef _Mdouble_
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#undef __MATH_PRECNAME
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#undef __MATHDECL_1
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#undef __MATHDECL
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#undef __MATHCALL
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__END_DECLS
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#endif /* complex.h */
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