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Support bits/floatn.h inclusion from .S files.

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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.
This commit is contained in:
Joseph Myers
2017-11-17 22:01:43 +00:00
parent ce003e5d4c
commit 015c6dc288
8 changed files with 334 additions and 295 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
ChangeLog
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@ -1,3 +1,14 @@
2017-11-17 Joseph Myers <joseph@codesourcery.com>
* 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.
2017-11-17 Florian Weimer <fweimer@redhat.com>
support_become_root: Enable file creation in namespaces.

4
bits/floatn-common.h
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@ -71,6 +71,8 @@
# define __HAVE_FLOATN_NOT_TYPEDEF 0
#endif
#ifndef __ASSEMBLER__
/* Defined to concatenate the literal suffix to be used with _FloatN
or _FloatNx types, if __HAVE_<type> is 1. The corresponding
literal suffixes exist since GCC 7, for C only. */
@ -289,4 +291,6 @@ typedef _Float128 _Float64x;
# endif
#endif /* !__ASSEMBLER__. */
#endif /* _BITS_FLOATN_COMMON_H */

4
bits/floatn.h
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@ -25,6 +25,8 @@
from the default float, double and long double types in this glibc. */
#define __HAVE_DISTINCT_FLOAT128 0
#ifndef __ASSEMBLER__
/* Defined to concatenate the literal suffix to be used with _Float128
types, if __HAVE_FLOAT128 is 1.
E.g.: #define __f128(x) x##f128. */
@ -34,4 +36,6 @@
E.g.: #define __CFLOAT128 _Complex _Float128. */
# undef __CFLOAT128
#endif /* !__ASSEMBLER__. */
#include <bits/floatn-common.h>

4
sysdeps/ia64/bits/floatn.h
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@ -40,6 +40,8 @@
# define __HAVE_DISTINCT_FLOAT128 0
#endif
#ifndef __ASSEMBLER__
/* Defined to concatenate the literal suffix to be used with _Float128
types, if __HAVE_FLOAT128 is 1. */
# if __HAVE_FLOAT128
@ -99,6 +101,8 @@ typedef __float128 _Float128;
# endif
#endif /* !__ASSEMBLER__. */
#include <bits/floatn-common.h>
#endif /* _BITS_FLOATN_H */

4
sysdeps/ieee754/ldbl-128/bits/floatn.h
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@ -39,6 +39,8 @@
from the default float, double and long double types in this glibc. */
#define __HAVE_DISTINCT_FLOAT128 0
#ifndef __ASSEMBLER__
/* Defined to concatenate the literal suffix to be used with _Float128
types, if __HAVE_FLOAT128 is 1. */
# if __HAVE_FLOAT128
@ -77,6 +79,8 @@ typedef long double _Float128;
# endif
#endif /* !__ASSEMBLER__. */
#include <bits/floatn-common.h>
#endif /* _BITS_FLOATN_H */

4
sysdeps/mips/ieee754/bits/floatn.h
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@ -39,6 +39,8 @@
from the default float, double and long double types in this glibc. */
#define __HAVE_DISTINCT_FLOAT128 0
#ifndef __ASSEMBLER__
/* Defined to concatenate the literal suffix to be used with _Float128
types, if __HAVE_FLOAT128 is 1. */
# if __HAVE_FLOAT128
@ -77,6 +79,8 @@ typedef long double _Float128;
# endif
#endif /* !__ASSEMBLER__. */
#include <bits/floatn-common.h>
#endif /* _BITS_FLOATN_H */

4
sysdeps/powerpc/bits/floatn.h
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@ -40,6 +40,8 @@
# define __HAVE_DISTINCT_FLOAT128 0
#endif
#ifndef __ASSEMBLER__
/* Defined to concatenate the literal suffix to be used with _Float128
types, if __HAVE_FLOAT128 is 1. */
# if __HAVE_FLOAT128
@ -98,6 +100,8 @@ typedef __float128 _Float128;
# endif
#endif /* !__ASSEMBLER__. */
#include <bits/floatn-common.h>
#endif /* _BITS_FLOATN_H */

4
sysdeps/x86/bits/floatn.h
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@ -42,6 +42,8 @@
# define __HAVE_DISTINCT_FLOAT128 0
#endif
#ifndef __ASSEMBLER__
/* Defined to concatenate the literal suffix to be used with _Float128
types, if __HAVE_FLOAT128 is 1. */
# if __HAVE_FLOAT128
@ -101,6 +103,8 @@ typedef __float128 _Float128;
# endif
#endif /* !__ASSEMBLER__. */
#include <bits/floatn-common.h>
#endif /* _BITS_FLOATN_H */