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Add libm_alias_*_other_r macros.

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Some libm functions are unable to use the generic alias macros such as
libm_alias_double because they have special symbol versioning
requirements for the main float, double or long double public names.

To facilitate adding _FloatN / _FloatNx function aliases in future,
it's still desirable to have generic macros those functions can use as
far as possible.  This patch adds macros such as
libm_alias_double_other, which only define names for _FloatN /
_FloatNx aliases, not for float / double / long double.  As present,
all these new macros do nothing, but they are called in the
appropriate places in macros such as libm_alias_double.  This patch
also arranges for lgamma implementations, and the recently added
optimized float function implementations, to use the new macros to
make them ready for addition of _FloatN / _FloatNx aliases.

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

	* sysdeps/generic/libm-alias-double.h (libm_alias_double_other_r):
	New macro.
	(libm_alias_double_other): Likewise.
	(libm_alias_double_r): Use libm_alias_double_other_r.
	* sysdeps/generic/libm-alias-float.h (libm_alias_float_other_r):
	New macro.
	(libm_alias_float_other): Likewise.
	(libm_alias_float_r): Use libm_alias_float_other_r.
	* sysdeps/generic/libm-alias-float128.h
	(libm_alias_float128_other_r): New macro.
	(libm_alias_float128_other): Likewise.
	(libm_alias_float128_r): Use libm_alias_float128_other_r.
	* sysdeps/generic/libm-alias-ldouble.h
	(libm_alias_ldouble_other_r): New macro.
	(libm_alias_ldouble_other): Likewise.
	(libm_alias_ldouble_r): Use libm_alias_ldouble_other_r.
	* sysdeps/ieee754/ldbl-opt/libm-alias-double.h
	(libm_alias_double_other_r): New macro.
	(libm_alias_double_other): Likewise.
	(libm_alias_double_r): Use libm_alias_double_other_r.
	* sysdeps/ieee754/ldbl-opt/libm-alias-ldouble.h
	(libm_alias_ldouble_other_r): New macro.
	(libm_alias_ldouble_other): Likewise.
	(libm_alias_ldouble_r): Use libm_alias_ldouble_other_r.
	* math/w_lgamma_main.c: Include <libm-alias-double.h>.
	[!USE_AS_COMPAT]: Use libm_alias_double_other.
	* math/w_lgammaf_main.c: Include <libm-alias-float.h>.
	[!USE_AS_COMPAT]: Use libm_alias_float_other.
	* math/w_lgammal_main.c: Include <libm-alias-ldouble.h>.
	[!USE_AS_COMPAT]: Use libm_alias_ldouble_other.
	* math/w_exp2f.c: Use libm_alias_float_other.
	* math/w_expf.c: Likewise.
	* math/w_log2f.c: Likewise.
	* math/w_logf.c: Likewise.
	* math/w_powf.c: Likewise.
	* sysdeps/ieee754/flt-32/e_exp2f.c: Include <libm-alias-float.h>.
	[!__exp2f]: Use libm_alias_float_other.
	* sysdeps/ieee754/flt-32/e_expf.c: Include <libm-alias-float.h>.
	[!__expf]: Use libm_alias_float_other.
	* sysdeps/ieee754/flt-32/e_log2f.c: Include <libm-alias-float.h>.
	[!__log2f]: Use libm_alias_float_other.
	* sysdeps/ieee754/flt-32/e_logf.c: Include <libm-alias-float.h>.
	[!__logf]: Use libm_alias_float_other.
	* sysdeps/ieee754/flt-32/e_powf.c: Include <libm-alias-float.h>.
	[!__powf]: Use libm_alias_float_other.
This commit is contained in:
Joseph Myers 2017-10-10 21:29:11 +00:00
parent 8ed70de2fa
commit 24b6515d87
20 changed files with 144 additions and 7 deletions
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48
ChangeLog
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@ -1,3 +1,51 @@
2017-10-10 Joseph Myers <joseph@codesourcery.com>
* sysdeps/generic/libm-alias-double.h (libm_alias_double_other_r):
New macro.
(libm_alias_double_other): Likewise.
(libm_alias_double_r): Use libm_alias_double_other_r.
* sysdeps/generic/libm-alias-float.h (libm_alias_float_other_r):
New macro.
(libm_alias_float_other): Likewise.
(libm_alias_float_r): Use libm_alias_float_other_r.
* sysdeps/generic/libm-alias-float128.h
(libm_alias_float128_other_r): New macro.
(libm_alias_float128_other): Likewise.
(libm_alias_float128_r): Use libm_alias_float128_other_r.
* sysdeps/generic/libm-alias-ldouble.h
(libm_alias_ldouble_other_r): New macro.
(libm_alias_ldouble_other): Likewise.
(libm_alias_ldouble_r): Use libm_alias_ldouble_other_r.
* sysdeps/ieee754/ldbl-opt/libm-alias-double.h
(libm_alias_double_other_r): New macro.
(libm_alias_double_other): Likewise.
(libm_alias_double_r): Use libm_alias_double_other_r.
* sysdeps/ieee754/ldbl-opt/libm-alias-ldouble.h
(libm_alias_ldouble_other_r): New macro.
(libm_alias_ldouble_other): Likewise.
(libm_alias_ldouble_r): Use libm_alias_ldouble_other_r.
* math/w_lgamma_main.c: Include <libm-alias-double.h>.
[!USE_AS_COMPAT]: Use libm_alias_double_other.
* math/w_lgammaf_main.c: Include <libm-alias-float.h>.
[!USE_AS_COMPAT]: Use libm_alias_float_other.
* math/w_lgammal_main.c: Include <libm-alias-ldouble.h>.
[!USE_AS_COMPAT]: Use libm_alias_ldouble_other.
* math/w_exp2f.c: Use libm_alias_float_other.
* math/w_expf.c: Likewise.
* math/w_log2f.c: Likewise.
* math/w_logf.c: Likewise.
* math/w_powf.c: Likewise.
* sysdeps/ieee754/flt-32/e_exp2f.c: Include <libm-alias-float.h>.
[!__exp2f]: Use libm_alias_float_other.
* sysdeps/ieee754/flt-32/e_expf.c: Include <libm-alias-float.h>.
[!__expf]: Use libm_alias_float_other.
* sysdeps/ieee754/flt-32/e_log2f.c: Include <libm-alias-float.h>.
[!__log2f]: Use libm_alias_float_other.
* sysdeps/ieee754/flt-32/e_logf.c: Include <libm-alias-float.h>.
[!__logf]: Use libm_alias_float_other.
* sysdeps/ieee754/flt-32/e_powf.c: Include <libm-alias-float.h>.
[!__powf]: Use libm_alias_float_other.
2017-10-10 Florian Weimer <fweimer@redhat.com>
* nss/nss_files/files-hosts.c (gethostbyname3_multi): New

1
math/w_exp2f.c
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@ -5,3 +5,4 @@
#define declare_mgen_alias(a, b)
#include <w_exp2_template.c>
versioned_symbol (libm, __exp2f, exp2f, GLIBC_2_27);
libm_alias_float_other (__exp2, exp2)

1
math/w_expf.c
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@ -5,3 +5,4 @@
#define declare_mgen_alias(a, b)
#include <w_exp_template.c>
versioned_symbol (libm, __expf, expf, GLIBC_2_27);
libm_alias_float_other (__exp, exp)

2
math/w_lgamma_main.c
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@ -19,6 +19,7 @@
#include <math.h>
#include <math_private.h>
#include <math-svid-compat.h>
#include <libm-alias-double.h>
#include <lgamma-compat.h>
@ -48,6 +49,7 @@ versioned_symbol (libm, __lgamma, lgamma, LGAMMA_NEW_VER);
strong_alias (__lgamma, __lgammal)
versioned_symbol (libm, __lgammal, lgammal, LGAMMA_NEW_VER);
# endif
libm_alias_double_other (__lgamma, lgamma)
# endif
# if GAMMA_ALIAS
strong_alias (LGFUNC (__lgamma), __gamma)

2
math/w_lgammaf_main.c
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@ -16,6 +16,7 @@
#include <math.h>
#include <math_private.h>
#include <math-svid-compat.h>
#include <libm-alias-float.h>
#include <lgamma-compat.h>
@ -37,6 +38,7 @@ LGFUNC (__lgammaf) (float x)
compat_symbol (libm, __lgammaf_compat, lgammaf, LGAMMA_OLD_VER);
# else
versioned_symbol (libm, __lgammaf, lgammaf, LGAMMA_NEW_VER);
libm_alias_float_other (__lgamma, lgamma)
# endif
# if GAMMA_ALIAS
strong_alias (LGFUNC (__lgammaf), __gammaf)

2
math/w_lgammal_main.c
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@ -23,6 +23,7 @@
#include <math.h>
#include <math_private.h>
#include <math-svid-compat.h>
#include <libm-alias-ldouble.h>
#include <lgamma-compat.h>
@ -44,6 +45,7 @@ LGFUNC (__lgammal) (long double x)
compat_symbol (libm, __lgammal_compat, lgammal, LGAMMA_OLD_VER);
# else
versioned_symbol (libm, __lgammal, lgammal, LGAMMA_NEW_VER);
libm_alias_ldouble_other (__lgamma, lgamma)
# endif
# if GAMMA_ALIAS
strong_alias (LGFUNC (__lgammal), __gammal)

1
math/w_log2f.c
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@ -5,3 +5,4 @@
#define declare_mgen_alias(a, b)
#include <w_log2_template.c>
versioned_symbol (libm, __log2f, log2f, GLIBC_2_27);
libm_alias_float_other (__log2, log2)

1
math/w_logf.c
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@ -5,3 +5,4 @@
#define declare_mgen_alias(a, b)
#include <w_log_template.c>
versioned_symbol (libm, __logf, logf, GLIBC_2_27);
libm_alias_float_other (__log, log)

1
math/w_powf.c
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@ -5,3 +5,4 @@
#define declare_mgen_alias(a, b)
#include <w_pow_template.c>
versioned_symbol (libm, __powf, powf, GLIBC_2_27);
libm_alias_float_other (__pow, pow)

16
sysdeps/generic/libm-alias-double.h
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@ -19,6 +19,16 @@
#ifndef _LIBM_ALIAS_DOUBLE_H
#define _LIBM_ALIAS_DOUBLE_H
/* Define _FloatN / _FloatNx aliases for a double libm function that
has internal name FROM ## R and public names TO ## suffix ## R for
each suffix of a supported _FloatN / _FloatNx floating-point type
with the same format as double. */
#define libm_alias_double_other_r(from, to, r)
/* Likewise, but without the R suffix. */
#define libm_alias_double_other(from, to) \
libm_alias_double_other_r (from, to, )
/* Define aliases for a double libm function that has internal name
FROM ## R and public names TO ## suffix ## R for each suffix of a
supported floating-point type with the same format as double. This
@ -30,10 +40,12 @@
# define libm_alias_double_r(from, to, r) \
weak_alias (from ## r, to ## r) \
strong_alias (from ## r, from ## l ## r) \
weak_alias (from ## r, to ## l ## r)
weak_alias (from ## r, to ## l ## r) \
libm_alias_double_other_r (from, to, r)
#else
# define libm_alias_double_r(from, to, r) \
weak_alias (from ## r, to ## r)
weak_alias (from ## r, to ## r) \
libm_alias_double_other_r (from, to, r)
#endif
/* Likewise, but without the R suffix. */

13
sysdeps/generic/libm-alias-float.h
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@ -19,6 +19,16 @@
#ifndef _LIBM_ALIAS_FLOAT_H
#define _LIBM_ALIAS_FLOAT_H
/* Define _FloatN / _FloatNx aliases for a float libm function that
has internal name FROM ## f ## R and public names TO ## suffix ## R
for each suffix of a supported _FloatN / _FloatNx floating-point
type with the same format as float. */
#define libm_alias_float_other_r(from, to, r)
/* Likewise, but without the R suffix. */
#define libm_alias_float_other(from, to) \
libm_alias_float_other_r (from, to, )
/* Define aliases for a float libm function that has internal name
FROM ## f ## R and public names TO ## suffix ## R for each suffix
of a supported floating-point type with the same format as float.
@ -27,7 +37,8 @@
names (where there is one name per format, not per type) or for
obsolescent functions not provided for _FloatN types. */
#define libm_alias_float_r(from, to, r) \
weak_alias (from ## f ## r, to ## f ## r)
weak_alias (from ## f ## r, to ## f ## r) \
libm_alias_float_other_r (from, to, r)
/* Likewise, but without the R suffix. */
#define libm_alias_float(from, to) libm_alias_float_r (from, to, )

14
sysdeps/generic/libm-alias-float128.h
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@ -19,6 +19,17 @@
#ifndef _LIBM_ALIAS_FLOAT128_H
#define _LIBM_ALIAS_FLOAT128_H
/* Define _FloatN / _FloatNx aliases (other than that for _Float128)
for a _Float128 libm function that has internal name FROM ## f128
## R and public names TO ## suffix ## R for each suffix of a
supported _FloatN / _FloatNx floating-point type with the same
format as _Float128. */
#define libm_alias_float128_other_r(from, to, r)
/* Likewise, but without the R suffix. */
#define libm_alias_float128_other(from, to) \
libm_alias_float128_other_r (from, to, )
/* 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
@ -28,7 +39,8 @@
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)
weak_alias (from ## f128 ## r, to ## f128 ## r) \
libm_alias_float128_other_r (from, to, r)
/* Likewise, but without the R suffix. */
#define libm_alias_float128(from, to) libm_alias_float128_r (from, to, )

13
sysdeps/generic/libm-alias-ldouble.h
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@ -19,6 +19,16 @@
#ifndef _LIBM_ALIAS_LDOUBLE_H
#define _LIBM_ALIAS_LDOUBLE_H
/* Define _FloatN / _FloatNx aliases for a long double libm function
that has internal name FROM ## l ## R and public names TO ## suffix
## R for each suffix of a supported _FloatN / _FloatNx
floating-point type with the same format as long double. */
#define libm_alias_ldouble_other_r(from, to, r)
/* Likewise, but without the R suffix. */
#define libm_alias_ldouble_other(from, to) \
libm_alias_ldouble_other_r (from, to, )
/* Define aliases for a long double libm function that has internal
name FROM ## l ## R and public names TO ## suffix ## R for each
suffix of a supported floating-point type with the same format as
@ -28,7 +38,8 @@
per format, not per type) or for obsolescent functions not provided
for _FloatN types. */
#define libm_alias_ldouble_r(from, to, r) \
weak_alias (from ## l ## r, to ## l ## r)
weak_alias (from ## l ## r, to ## l ## r) \
libm_alias_ldouble_other_r (from, to, r)
/* Likewise, but without the R suffix. */
#define libm_alias_ldouble(from, to) libm_alias_ldouble_r (from, to, )

2
sysdeps/ieee754/flt-32/e_exp2f.c
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@ -19,6 +19,7 @@
#include <math.h>
#include <stdint.h>
#include <shlib-compat.h>
#include <libm-alias-float.h>
#include "math_config.h"
/*
@ -90,4 +91,5 @@ __exp2f (float x)
strong_alias (__exp2f, __ieee754_exp2f)
strong_alias (__exp2f, __exp2f_finite)
versioned_symbol (libm, __exp2f, exp2f, GLIBC_2_27);
libm_alias_float_other (__exp2, exp2)
#endif

2
sysdeps/ieee754/flt-32/e_expf.c
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@ -24,6 +24,7 @@
#include <math.h>
#include <stdint.h>
#include <shlib-compat.h>
#include <libm-alias-float.h>
#include "math_config.h"
/*
@ -111,4 +112,5 @@ hidden_def (__expf)
strong_alias (__expf, __ieee754_expf)
strong_alias (__expf, __expf_finite)
versioned_symbol (libm, __expf, expf, GLIBC_2_27);
libm_alias_float_other (__exp, exp)
#endif

2
sysdeps/ieee754/flt-32/e_log2f.c
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@ -19,6 +19,7 @@
#include <math.h>
#include <stdint.h>
#include <shlib-compat.h>
#include <libm-alias-float.h>
#include "math_config.h"
/*
@ -90,4 +91,5 @@ __log2f (float x)
strong_alias (__log2f, __ieee754_log2f)
strong_alias (__log2f, __log2f_finite)
versioned_symbol (libm, __log2f, log2f, GLIBC_2_27);
libm_alias_float_other (__log2, log2)
#endif

2
sysdeps/ieee754/flt-32/e_logf.c
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@ -19,6 +19,7 @@
#include <math.h>
#include <stdint.h>
#include <shlib-compat.h>
#include <libm-alias-float.h>
#include "math_config.h"
/*
@ -89,4 +90,5 @@ __logf (float x)
strong_alias (__logf, __ieee754_logf)
strong_alias (__logf, __logf_finite)
versioned_symbol (libm, __logf, logf, GLIBC_2_27);
libm_alias_float_other (__log, log)
#endif

2
sysdeps/ieee754/flt-32/e_powf.c
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@ -19,6 +19,7 @@
#include <math.h>
#include <stdint.h>
#include <shlib-compat.h>
#include <libm-alias-float.h>
#include "math_config.h"
/*
@ -219,4 +220,5 @@ __powf (float x, float y)
strong_alias (__powf, __ieee754_powf)
strong_alias (__powf, __powf_finite)
versioned_symbol (libm, __powf, powf, GLIBC_2_27);
libm_alias_float_other (__pow, pow)
#endif

13
sysdeps/ieee754/ldbl-opt/libm-alias-double.h
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@ -23,6 +23,16 @@
#include <first-versions.h>
#include <ldbl-compat-choose.h>
/* Define _FloatN / _FloatNx aliases for a double libm function that
has internal name FROM ## R and public names TO ## suffix ## R for
each suffix of a supported _FloatN / _FloatNx floating-point type
with the same format as double. */
#define libm_alias_double_other_r(from, to, r)
/* Likewise, but without the R suffix. */
#define libm_alias_double_other(from, to) \
libm_alias_double_other_r (from, to, )
/* Define aliases for a double libm function that has internal name
FROM ## R and public names TO ## suffix ## R for each suffix of a
supported floating-point type with the same format as double. This
@ -36,7 +46,8 @@
(compat_symbol (libm, \
from ## r, \
to ## l ## r, \
FIRST_VERSION_libm_ ## to ## l ## r), );
FIRST_VERSION_libm_ ## to ## l ## r), ); \
libm_alias_double_other_r (from, to, r)
/* Likewise, but without the R suffix. */
#define libm_alias_double(from, to) libm_alias_double_r (from, to, )

13
sysdeps/ieee754/ldbl-opt/libm-alias-ldouble.h
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@ -22,6 +22,16 @@
#include <math_ldbl_opt.h>
#include <ldbl-compat-choose.h>
/* Define _FloatN / _FloatNx aliases for a long double libm function
that has internal name FROM ## l ## R and public names TO ## suffix
## R for each suffix of a supported _FloatN / _FloatNx
floating-point type with the same format as long double. */
#define libm_alias_ldouble_other_r(from, to, r)
/* Likewise, but without the R suffix. */
#define libm_alias_ldouble_other(from, to) \
libm_alias_ldouble_other_r (from, to, )
/* Define aliases for a long double libm function that has internal
name FROM ## l ## R and public names TO ## suffix ## R for each
suffix of a supported floating-point type with the same format as
@ -33,7 +43,8 @@
#define libm_alias_ldouble_r(from, to, r) \
LONG_DOUBLE_COMPAT_CHOOSE_libm_ ## to ## l ## r \
(long_double_symbol (libm, from ## l ## r, to ## l ## r), \
weak_alias (from ## l ## r, to ## l ## r));
weak_alias (from ## l ## r, to ## l ## r)); \
libm_alias_ldouble_other_r (from, to, r)
/* Likewise, but without the R suffix. */
#define libm_alias_ldouble(from, to) libm_alias_ldouble_r (from, to, )