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Author SHA1 Message Date
Joseph Myers
4ca70e1a2b Handle more _FloatN, _FloatNx types in __MATH_TG. 
Continuing the preparation for additional _FloatN / _FloatNx type
support, this patch prepares __MATH_TG to handle more such types.

Various unhandled cases, which do not correspond to any current glibc
configuration, have explicit #errors added.  _Float32 and _Float64x
are then handled appropriately in the _Generic case, which is the only
one, other than the cases where use of sizeof is sufficient, where
they should ever be explicit types at the language level instead of
typedefs.  There is no need to handle _Float64 or _Float32x explicitly
there because the default case calling a double function is correct
for those types.

Tested for x86_64.

	* math/math.h [__HAVE_DISTINCT_FLOAT16
	|| __HAVE_DISTINCT_FLOAT32 || __HAVE_DISTINCT_FLOAT64
	|| __HAVE_DISTINCT_FLOAT32X || __HAVE_DISTINCT_FLOAT64X
	|| __HAVE_DISTINCT_FLOAT128X]: Use #error.
	[__NO_LONG_DOUBLE_MATH && __HAVE_DISTINCT_FLOAT128]: Likewise.
	[__HAVE_DISTINCT_FLOAT128 && !__HAVE_GENERIC_SELECTION
	&& __HAVE_FLOATN_NOT_TYPEDEF]: Likewise.
	[__HAVE_DISTINCT_FLOAT128 && __HAVE_GENERIC_SELECTION]
	(__MATH_TG_F32): New macro.
	[__HAVE_DISTINCT_FLOAT128 && __HAVE_GENERIC_SELECTION]
	(__MATH_TG_F64X): Likewise.
	[__HAVE_DISTINCT_FLOAT128 && __HAVE_GENERIC_SELECTION]
	(__MATH_TG): Use __MATH_TG_F32 and __MATH_TG_F64X.
 2017-11-03 23:50:00 +00:00
Joseph Myers
86ec486597 Handle more _FloatN, _FloatNx types in tgmath.h. 
Continuing the preparation for additional _FloatN / _FloatNx type
support, this patch improves how <tgmath.h> handles such types.

Use of #error is added for cases of distinct types that are not
supported by the header, to indicate that additional work on the
header would be needed if, for example, _Float16 support were added to
glibc.  Given that #error, types with the same format as other types
are handled automatically by the sizeof-based logic, so the only case
needing special handling is that where _Float64x exists, has the same
format as _Float128, does not have the same format as long double, and
is not a typedef for _Float128.  In this case (which will apply for
powerpc64le once _Float64x support is added to glibc), the
__builtin_types_compatible_p calls testing for _Float128 need
corresponding calls testing for _Float64x, which this patch adds.

Tested for x86_64.

	* math/tgmath.h [__HAVE_DISTINCT_FLOAT16
	|| __HAVE_DISTINCT_FLOAT32 || __HAVE_DISTINCT_FLOAT64
	|| __HAVE_DISTINCT_FLOAT32X || __HAVE_DISTINCT_FLOAT64X
	|| __HAVE_DISTINCT_FLOAT128X]: Use #error.
	[__HAVE_DISTINCT_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
	&& __HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE
	&& __HAVE_FLOATN_NOT_TYPEDEF] (__TGMATH_F128): Handle _Float64x
	the same as _Float128.
	[__HAVE_DISTINCT_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
	&& __HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE
	&& __HAVE_FLOATN_NOT_TYPEDEF] (__TGMATH_CF128): Likewise.
 2017-11-03 21:11:50 +00:00
Joseph Myers
260fbd0a39 Include bits/cmathcalls.h for more _FloatN, _FloatNx types. 
Continuing the preparation for additional _FloatN / _FloatNx type
support, this patch arranges for <bits/cmathcalls.h> to be included by
<complex.h> for each such type under conditions and with macros
defined corresponding to those used for _Float128.

Tested for x86_64.

	* math/complex.h
	[(__HAVE_DISTINCT_FLOAT16 || (__HAVE_FLOAT16 && !_LIBC))
	&& __GLIBC_USE (IEC_60559_TYPES_EXT)]: Include <bits/cmathcalls.h>
	with appropriate macros defined and undefined.
	[(__HAVE_DISTINCT_FLOAT32 || (__HAVE_FLOAT32 && !_LIBC))
	&& __GLIBC_USE (IEC_60559_TYPES_EXT)]: Likewise.
	[(__HAVE_DISTINCT_FLOAT64 || (__HAVE_FLOAT64 && !_LIBC))
	&& __GLIBC_USE (IEC_60559_TYPES_EXT)]: Likewise.
	[(__HAVE_DISTINCT_FLOAT32X || (__HAVE_FLOAT32X && !_LIBC))
	&& __GLIBC_USE (IEC_60559_TYPES_EXT)]: Likewise.
	[(__HAVE_DISTINCT_FLOAT64X || (__HAVE_FLOAT64X && !_LIBC))
	&& __GLIBC_USE (IEC_60559_TYPES_EXT)]: Likewise.
	[(__HAVE_DISTINCT_FLOAT128X || (__HAVE_FLOAT128X && !_LIBC))
	&& __GLIBC_USE (IEC_60559_TYPES_EXT)]: Likewise.
 2017-11-01 23:42:31 +00:00
Joseph Myers
2f1b212e54 Clean up complex.h handling of float128. 
This patch cleans up the way complex.h handles inclusion of
bits/cmathcalls.h for float128.  The inclusion was between those for
the types float and long double; the patch moves it after that for
long double, matching how bits/mathcalls.h and bits/math-finite.h
inclusions are ordered.  There is no need for the undefine and define
of _Mdouble_complex_ to be conditional, since __CFLOAT128 is always
defined by bits/floatn.h when _Float128 is supported, so the patch
removes the unnecessary conditionals.

Tested for x86_64.

	* math/complex.h
	[(__HAVE_DISTINCT_FLOAT128 || (__HAVE_FLOAT128 && !LIBC))
	&& __GLIBC_USE (IEC_60559_TYPES_EXT)]: Move conditional code after
	that for long double.  Do not condition define and undefine of
	_Mdouble_complex_ on [__CFLOAT128].
 2017-11-01 17:03:58 +00:00
Joseph Myers
43e662837c Define CMPLX macros for more _FloatN, _FloatNx types. 
Continuing the preparation for additional _FloatN / _FloatNx type
support, this patch defines CMPLX* macros for all such types, as
already done for _Float128.

Tested for x86_64.

	* math/complex.h
	[__HAVE_FLOAT16 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (CMPLXF16):
	New macro.
	[__HAVE_FLOAT32 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (CMPLXF32):
	Likewise.
	[__HAVE_FLOAT64 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (CMPLXF64):
	Likewise.
	[__HAVE_FLOAT32X && __GLIBC_USE (IEC_60559_TYPES_EXT)]
	(CMPLXF32X): Likewise.
	[__HAVE_FLOAT64X && __GLIBC_USE (IEC_60559_TYPES_EXT)]
	(CMPLXF64X): Likewise.
	[__HAVE_FLOAT128X && __GLIBC_USE (IEC_60559_TYPES_EXT)]
	(CMPLXF128X): Likewise.
 2017-10-31 17:04:30 +00:00
Joseph Myers
540af6e2f1 Adjust __MATH_EVAL_FMT2 definition to handle _Float16 better. 
Continuing the preparation for additional _FloatN / _FloatNx type
support, this patch adds an additional case in the definition of
__MATH_EVAL_FMT2, as used in defining iseqsig: when
__FLT_EVAL_METHOD__ is 0 or 32, it adds 0.0f to the arguments, so that
the correct function would be selected in the case of _Float16
arguments with excess precision (were glibc to support _Float16, which
of course __MATH_TG and other facilities do not at present - and
_Float16 support is not part of what this patch series is aiming for,
but this particular fix is simple so is included anyway).

Tested for x86_64.

	* math/math.h
	[__FLT_EVAL_METHOD__ == 0 || __FLT_EVAL_METHOD__ == 32]
	(__MATH_EVAL_FMT2): Define to add 0.0f.
 2017-10-31 16:01:51 +00:00
Joseph Myers
b61afe8c81 Include bits/math-finite.h for more _FloatN, _FloatNx types. 
Continuing the preparation for additional _FloatN / _FloatNx type
support, this patch extends the includes of <bits/math-finite.h> to
cover all such types, under conditions analogous to those for
_Float128.

Tested for x86_64.

	* math/math.h [__HAVE_DISTINCT_FLOAT16 || (__HAVE_FLOAT16 && !_LIBC)]:
	Include <bits/math-finite.h> with appropriate macros defined and
	undefined.
	[__HAVE_DISTINCT_FLOAT32 || (__HAVE_FLOAT32 && !_LIBC)]: Likewise.
	[__HAVE_DISTINCT_FLOAT64 || (__HAVE_FLOAT64 && !_LIBC)]: Likewise.
	[__HAVE_DISTINCT_FLOAT32X || (__HAVE_FLOAT32X && !_LIBC)]: Likewise.
	[__HAVE_DISTINCT_FLOAT64X || (__HAVE_FLOAT64X && !_LIBC)]: Likewise.
	[__HAVE_DISTINCT_FLOAT128X || (__HAVE_FLOAT128X && !_LIBC)]: Likewise.
 2017-10-30 22:15:40 +00:00
Joseph Myers
eda162dd8a Remove _Mlong_double_ etc. macros. 
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.
 2017-10-30 20:58:51 +00:00
Joseph Myers
ce12269fac Add _FloatN, _FloatNx M_* constants. 
Continuing the preparation for additional _FloatN / _FloatNx type
support, this patch adds M_* constants for such types.  The decimal
expansions used are all the same as used for _Float128; there's no
need to reduce the precision used.  In the case of _Float128x, #error
is used because the constants would need additional precision, but how
much is needed would depend on the actual _Float128x format used, so
it's not possible to add header support simply as part of code that
handles all _FloatN / _FloatNx types similarly.

Tested for x86_64.

	* math/math.h [__HAVE_FLOAT16 && __USE_GNU] (M_Ef16): New macro.
	[__HAVE_FLOAT16 && __USE_GNU] (M_LOG2Ef16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_LOG10Ef16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_LN2f16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_LN10f16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_PIf16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_PI_2f16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_PI_4f16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_1_PIf16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_2_PIf16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_2_SQRTPIf16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_SQRT2f16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_SQRT1_2f16): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_Ef32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_LOG2Ef32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_LOG10Ef32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_LN2f32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_LN10f32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_PIf32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_PI_2f32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_PI_4f32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_1_PIf32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_2_PIf32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_2_SQRTPIf32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_SQRT2f32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_SQRT1_2f32): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_Ef64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_LOG2Ef64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_LOG10Ef64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_LN2f64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_LN10f64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_PIf64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_PI_2f64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_PI_4f64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_1_PIf64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_2_PIf64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_2_SQRTPIf64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_SQRT2f64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_SQRT1_2f64): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_Ef32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_LOG2Ef32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_LOG10Ef32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_LN2f32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_LN10f32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_PIf32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_PI_2f32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_PI_4f32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_1_PIf32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_2_PIf32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_2_SQRTPIf32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_SQRT2f32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_SQRT1_2f32x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_Ef64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_LOG2Ef64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_LOG10Ef64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_LN2f64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_LN10f64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_PIf64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_PI_2f64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_PI_4f64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_1_PIf64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_2_PIf64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_2_SQRTPIf64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_SQRT2f64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_SQRT1_2f64x): Likewise.
	[__HAVE_FLOAT128X && __USE_GNU]: Use #error.
 2017-10-30 16:42:28 +00:00
Joseph Myers
7e9d70736b Include bits/mathcalls.h for more _FloatN, _FloatNx types. 
Continuing the preparation for additional _FloatN / _FloatNx type
support, this patch arranges for <bits/mathcalls.h> and
<bits/mathcalls-helper-functions.h> to be included for each such type
under conditions and with macros defined corresponding to those
already present for _Float128.

Tested for x86_64.

	* math/math.h [__HAVE_DISTINCT_FLOAT16 || (__HAVE_FLOAT16 && !_LIBC)]:
	Include <bits/mathcalls-helper-functions.h> and <bits/mathcalls.h>
	with appropriate macros defined and undefined.
	[__HAVE_DISTINCT_FLOAT32 || (__HAVE_FLOAT32 && !_LIBC)]: Likewise.
	[__HAVE_DISTINCT_FLOAT64 || (__HAVE_FLOAT64 && !_LIBC)]: Likewise.
	[__HAVE_DISTINCT_FLOAT32X || (__HAVE_FLOAT32X && !_LIBC)]: Likewise.
	[__HAVE_DISTINCT_FLOAT64X || (__HAVE_FLOAT64X && !_LIBC)]: Likewise.
	[__HAVE_DISTINCT_FLOAT128X || (__HAVE_FLOAT128X && !_LIBC)]: Likewise.
 2017-10-27 22:43:46 +00:00
Joseph Myers
ecc7da5bb8 Add SNAN macros for more _FloatN, _FloatNx types. 
This patch continues the preparation for additional _FloatN / _FloatNx
type support by adding appropriately conditional definitions of SNAN*
macros, corresponding to the SNANF128 definition already present.

Tested for x86_64.

	* math/math.h [__HAVE_FLOAT16 && __GLIBC_USE
	(IEC_60559_TYPES_EXT)] (SNANF16): New macro.
	[__HAVE_FLOAT32 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (SNANF32):
	Likewise.
	[__HAVE_FLOAT64 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (SNANF64):
	Likewise.
	[__HAVE_FLOAT32X && __GLIBC_USE (IEC_60559_TYPES_EXT)] (SNANF32X):
	Likewise.
	[__HAVE_FLOAT64X && __GLIBC_USE (IEC_60559_TYPES_EXT)] (SNANF64X):
	Likewise.
	[__HAVE_FLOAT128X && __GLIBC_USE (IEC_60559_TYPES_EXT)]
	(SNANF128X): Likewise.
 2017-10-26 23:34:55 +00:00
Joseph Myers
5d220788b3 Add HUGE_VAL macros for more _FloatN, _FloatNx types. 
This patch continues the preparation for additional _FloatN / _FloatNx
type support by adding appropriately conditional definitions of
HUGE_VAL_* macros, corresponding to the HUGE_VAL_F128 definition
already present.

Tested for x86_64.

	* math/math.h [__HAVE_FLOAT16 && __GLIBC_USE
	(IEC_60559_TYPES_EXT)] (HUGE_VAL_F16): New macro.
	[__HAVE_FLOAT32 && __GLIBC_USE (IEC_60559_TYPES_EXT)]
	(HUGE_VAL_F32): Likewise.
	[__HAVE_FLOAT64 && __GLIBC_USE (IEC_60559_TYPES_EXT)]
	(HUGE_VAL_F64): Likewise.
	[__HAVE_FLOAT32X && __GLIBC_USE (IEC_60559_TYPES_EXT)]
	(HUGE_VAL_F32X): Likewise.
	[__HAVE_FLOAT64X && __GLIBC_USE (IEC_60559_TYPES_EXT)]
	(HUGE_VAL_F64X): Likewise.
	[__HAVE_FLOAT128X && __GLIBC_USE (IEC_60559_TYPES_EXT)]
	(HUGE_VAL_F128X): Likewise.
 2017-10-26 23:11:18 +00:00
Joseph Myers
797ba44ba2 Add bits/floatn.h defines for more _FloatN / _FloatNx types. 
The bits/floatn.h header currently only has defines relating to
_Float128.  This patch adds defines relating to other _FloatN /
_FloatNx types.

The approach taken is to add defines for all _FloatN / _FloatNx types
known to GCC, and to put them in a common bits/floatn-common.h header
included at the end of all the individual bits/floatn.h headers.  If
in future some defines become different for different glibc
configurations, they will move out into the separate bits/floatn.h
headers.

Some defines are expected always to be the same across glibc ports.
Corresponding defines are nevertheless put in this header.  The intent
is that where there are conditionals (in headers or in non-installed
files) that can just repeat the same or nearly the same logic for each
floating-point type, they should do so, even if in fact the cases for
some types could be unconditionally present or absent because the same
conditionals are true or false for all glibc configurations.  This
should make the glibc code with such conditionals easier to read,
because the reader can just see that the same conditionals are
repeated for each type, rather than seeing different conditionals for
different types and needing to reason, at each location with such
differences, why those differences are indeed correct there.  (Cases
involving per-format rather than per-type logic are more likely still
to need differences in how they handle different types.)

Having such defines and conditionals also helps in incremental
preparation for adding _Float32 / _Float64 / _Float32x / _Float64x
function aliases.  I intend subsequent patches to add such
conditionals corresponding to those already present for _Float128, as
well as making more architecture-specific function implementations use
common macros to define aliases in preparation for adding such _FloatN
/ _FloatNx aliases.

Tested for x86_64.

	* bits/floatn-common.h: New file.
	* math/Makefile (headers): Add bits/floatn-common.h.
	* bits/floatn.h: Include <bits/floatn-common.h>.
	* sysdeps/ia64/bits/floatn.h: Likewise.
	* sysdeps/ieee754/ldbl-128/bits/floatn.h: Likewise.
	* sysdeps/mips/ieee754/bits/floatn.h: Likewise.
	* sysdeps/powerpc/bits/floatn.h: Likewise.
	* sysdeps/x86/bits/floatn.h: Likewise.
 2017-10-20 21:42:51 +00:00
Romain Naour
386e1c26ac Let signbit use the builtin in C++ mode with gcc < 6.x (bug 22296) 
When using gcc < 6.x, signbit does not use the type-generic
__builtin_signbit builtin, instead it uses __MATH_TG.
However, when library support for float128 is available, __MATH_TG uses
__builtin_types_compatible_p, which is not available in C++ mode.

On the other hand, libstdc++ undefines (in cmath) many macros from
math.h, including signbit, so that it can provide its own functions.
However, during its configure tests, libstdc++ just tests for the
availability of the macros (it does not undefine them, nor does it
provide its own functions).

Finally, libstdc++ configure tests include math.h and get the definition
of signbit that uses __MATH_TG (and __builtin_types_compatible_p).
Since libstdc++ does not undefine the macros during its configure
tests, they fail.

This patch lets signbit use the builtin in C++ mode when gcc < 6.x is
used. This allows the configure test in libstdc++ to work.

Tested for x86_64.

	[BZ #22296]
	* math/math.h: Let signbit use the builtin in C++ mode with gcc
	< 6.x

Cc: Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com>
Cc: Joseph Myers <joseph@codesourcery.com>
 2017-10-17 12:06:44 -02:00
Joseph Myers
c38a4bfd59 Move some float128 symbol version definitions. 
With support for _Float128 functions on platforms where that type has
the same ABI as long double, as well as on platforms where it is
ABI-distinct, those functions will need to be exported from glibc's
shared libraries at appropriate symbol versions in each case.

This patch avoids duplication of lists of symbols to export by moving
the symbols other than __* to math/Versions and stdlib/Versions.
There, they are conditional on <float128-abi.h> defining
FLOAT128_VERSION and a default version of that header is added that
does not define that macro.  Enabling the float128 function aliases
will then include adding a sysdeps/ieee754/ldbl-128/float128-abi.h
that defines FLOAT128_VERSION to GLIBC_2.27.  Symbols __* remain in
sysdeps/ieee754/float128/Versions; those symbols should be present
only once per floating-point format, not once per type.

Note that if any platforms currently lacking support for a type with
binary128 format get glibc support for such a type in future (whether
only as _Float128, or also as a new long double format), and new libm
functions (present for all types) have been added by then, additional
macros will be needed to allow such functions to get a version of the
form "GLIBC_2.28 if the platform had _Float128 support by then, or the
later version at which that platform had _Float128 support added".
This is not however a preexisting condition, but would have applied
equally to the existing support for _Float128 as an ABI-distinct
type.  New all-type libm functions should just be added to the
appropriate symbol version (currently GLIBC_2.27) for all types, with
such special-case handling for _Float128 versions (and _Float64x as
well in future) waiting until someone actually wants to add support
for _Float128 to an existing platform after a release in which that
platform and a post-2.26 libm function had support but that platform
lacked _Float128 support.

Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by this patch.  Also tested in conjunction
with the remaining changes to enable float128 aliases.

	* sysdeps/generic/float128-abi.h: New file.
	* sysdeps/ieee754/float128/Versions (FLOAT128_VERSION): Move
	non-__prefixed symbols to ....
	* math/Versions: ... here.  Include <float128-abi.h>.
	* stdlib/Versions ... and here.  Include <float128-abi.h>
 2017-10-16 22:04:42 +00:00
Joseph Myers
596f70134a Support running libm tests for float128 as alias for long double. 
This patch adds support for running libm tests for float128 in the
case where the float128 functions are aliases of long double
functions.  In this case, the sysdeps Makeconfig file
(i.e. sysdeps/ieee754/ldbl-128/Makeconfig) will need to define
"float128-alias-fcts = yes" to enable the tests.

Tested for x86_64.  Also tested with build-many-glibcs.py; installed
stripped shared libraries are unchanged by the patch.  Also tested
together with changes to enable the float128 aliases.

	* math/Makefile (test-types): Add
	$(type-float128-$(float128-alias-fcts)).
	* math/test-float128.h (TYPE_STR): Define conditional on
	[FLT128_MANT_DIG == LDBL_MANT_DIG].
	(ULP_IDX): Likewise.
	(ULP_I_IDX): Likewise.
 2017-10-16 13:28:30 +00:00
Joseph Myers
bc9620d040 Run libm long double tests for long double = double. 
All interfaces in the glibc API ought to be covered by the testsuite,
even where they alias other interfaces.  This patch arranges for libm
tests to be run for long double when it aliases double; previously
those tests were run only for the floating-point types with distinct
formats.  The long double tests are made to use the double ulps values
in this case, as having a separate duplicate set of ulps for them
seems unnecessary; to accommodate that, the test-<type>.h headers now
specify the macro indexing into the ulps array explicitly instead of
having it computed from PREFIX.

Nothing special is done about vector function tests.  None are
supported for any long double = double platforms, and supporting
vector functions for a type alias such as _Float32 would not simply
fall out of adding the scalar aliases for that type - it would require
vector function wrappers like those for *_finite (or, better, a new
GCC feature to allow specifying the asm name for vector functions
independently of that for scalar ones, as previously discussed), so it
seems reasonable to require the sysdeps makefile setting of
libmvec-tests to be updated if any such tests are to be run for type
aliases.

Tested for x86_64 and arm.

	* math/Makefile (test-types-basic): New variable.
	(test-types): Likewise.
	(libm-test-support): Use $(test-types) instead of $(types).
	(libm-tests-base-normal): Likewise.
	(libm-tests-base-finite): Likewise.
	(libm-tests-base-inline): Likewise.
	(generated): Likewise.
	($(objpfx)libm-test-support-$(t).c): Likewise.
	(libm-tests-for-type iterator): Likewise.
	(libm-test-support iterator): Likewise.
	* math/libm-test-support.c (ulp_i_idx): Use ULP_I_IDX.
	(ulp_idx): Use ULP_IDX.
	* math/test-ldouble.h: Include <float.h>.
	(TYPE_STR): Define conditional on [LDBL_MANT_DIG == DBL_MANT_DIG].
	(ULP_IDX): New macro.
	(ULP_I_IDX): Likewise.
	* math/test-double.h (ULP_IDX): Likewise.
	(ULP_I_IDX): Likewise.
	* math/test-float.h (ULP_IDX): Likewise.
	(ULP_I_IDX): Likewise.
	* math/test-float128.h (ULP_IDX): Likewise.
	(ULP_I_IDX): Likewise.
 2017-10-11 17:46:19 +00:00
Joseph Myers
24b6515d87 Add libm_alias_*_other_r macros. 
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.
 2017-10-10 21:29:11 +00:00
Joseph Myers
a8dce6197a Use generic macros for lgamma_r function aliases. 
Continuing the use of generic macros for defining libm function
aliases, in preparation for adding more _FloatN / _FloatNx function
names, this patch makes the lgamma_r functions use such macros.

declare_mgen_alias_r becomes a standard macro in math-type-macros.h
instead of being locally defined in w_lgamma_r_templace.c.  This in
turn must be defined by each math-type-macros-<type>.h.  Rather than
providing an unused default in math-type-macros.h, that header is made
to give an error if math-type-macros-<type>.h failed to define
declare_mgen_alias or declare_mgen_alias_r.  The compat lgamma_r
wrappers are updated similarly.  The ldbl-opt versions are removed as
no longer needed.

Tested for x86_64, and with build-many-glibcs.py.  Installed stripped
shared libraries are unchanged except for powerpc64le (where the usual
issue applies that an ldbl-opt long double function previously used
long_double_symbol unconditionally and now the symbol versions on
powerpc64le mean weak_alias is used instead, resulting in the same
symbol versions in the final shared library but still enough
difference in the input objects for that library not to be
byte-identical).

	* sysdeps/generic/math-type-macros.h [!declare_mgen_alias]: Give
	error.  Remove default definition of declare_mgen_alias.
	[!declare_mgen_alias_r]: Likewise.
	* sysdeps/generic/math-type-macros-double.h
	[!declare_mgen_alias_r] (declare_mgen_alias_r): New macro.
	* sysdeps/generic/math-type-macros-float.h [!declare_mgen_alias_r]
	(declare_mgen_alias_r): Likewise.
	* sysdeps/generic/math-type-macros-float128.h
	[!declare_mgen_alias_r] (declare_mgen_alias_r): Likewise.
	* sysdeps/generic/math-type-macros-ldouble.h
	[!declare_mgen_alias_r] (declare_mgen_alias_r): Likewise.
	* math/w_lgamma_r_template.c (declare_mgen_alias_r_x): Remove
	macro.
	(declare_mgen_alias_r_s): Likewise.
	(declare_mgen_alias_r): Likewise.
	* math/w_lgamma_r_compat.c: Include <libm-alias-double.h>.
	(lgamma_r): Define using libm_alias_double_r.
	* math/w_lgammaf_r_compat.c: Include <libm-alias-float.h>.
	(lgammaf_r): Define using libm_alias_float_r.
	* math/w_lgammal_r_compat.c: Include <libm-alias-ldouble.h>.
	(lgammal_r): Define using libm_alias_ldouble_r.
	* sysdeps/ieee754/ldbl-opt/w_lgamma_r_compat.c: Remove file.
	* sysdeps/ieee754/ldbl-opt/w_lgammal_r_compat.c: Likewise.
 2017-10-09 22:04:18 +00:00
Jonathan Wakely
d6c064e914 Ensure C99 and C11 interfaces are available for C++ [BZ #21326] 
This patch ensures that the C99 and C11 features required by C++ are
defined according to the value of the __cplusplus macro, and not just
because G++ always defines _GNU_SOURCE.  This will allow G++ to stop
defining _GNU_SOURCE some day, without causing the C99 and C11
interfaces to disappear for C++ programs.

	[BZ #21326]
	* include/features.h [__cplusplus >= 201103] (__USE_ISOC99): Define.
	[__cplusplus >= 201703] (__USE_ISOCXX17, __USE_ISOC11): Define.
	* math/Makefile (test-math-cxx11): New test.
	* math/test-math-cxx11.cc: New file.
 2017-10-09 16:18:11 +02:00
H.J. Lu
758f1bfa2a test-math-iscanonical.cc: Return errors != 0 
Since not all non-zero error counts are errors, return errors != 0
instead.

	* math/test-math-iscanonical.cc (do_test): Return errors != 0.
 2017-10-04 14:31:16 -07:00
H.J. Lu
cdd4155d6c test-math-iscanonical.cc: Replace bool with int 
Fix GCC 7 compilation error:

test-math-iscanonical.cc: In function ‘void check_type()’:
test-math-iscanonical.cc:33:11: error: use of an operand of type ‘bool’ in ‘operator++’ is deprecated [-Werror=deprecated]
     errors++;
           ^~

	* math/test-math-iscanonical.cc (error): Replace bool with int.
 2017-10-03 17:41:47 -07:00
Gabriel F. T. Gomes
aa0235dfde Add C++ versions of iscanonical for ldbl-96 and ldbl-128ibm (bug 22235) 
All representations of floating-point numbers in types with IEC 60559
binary exchange format are canonical.  On the other hand, types with IEC
60559 extended formats, such as those implemented under ldbl-96 and
ldbl-128ibm, contain representations that are not canonical.

TS 18661-1 introduced the type-generic macro iscanonical, which returns
whether a floating-point value is canonical or not.  In Glibc, this
type-generic macro is implemented using the macro __MATH_TG, which, when
support for float128 is enabled, relies on __builtin_types_compatible_p
to select between floating-point types.  However, this use of
iscanonical breaks C++ applications, because the builtin is only
available in C mode.

This patch provides a C++ implementation of iscanonical that relies on
function overloading, rather than builtins, to select between
floating-point types.

Unlike the C++ implementations for iszero and issignaling, this
implementation ignores __NO_LONG_DOUBLE_MATH.  The double type always
matches IEC 60559 double format, which is always canonical.  Thus, when
double and long double are the same (__NO_LONG_DOUBLE_MATH), iscanonical
always returns 1 and is not implemented with __MATH_TG.

Tested for powerpc64, powerpc64le and x86_64.

	[BZ #22235]
	* math/math.h: Trivial fix for unbalanced parentheses in comment.
	* math/Makefile [CXX] (tests): Add test-math-iscanonical.cc.
	(CFLAGS-test-math-iscanonical.cc): New variable.
	* math/test-math-iscanonical.cc: New file.
	* sysdeps/ieee754/ldbl-96/bits/iscanonical.h (iscanonical):
	Provide a C++ implementation based on function overloading,
	rather than using __MATH_TG, which uses C-only builtins.
	* sysdeps/ieee754/ldbl-128ibm/bits/iscanonical.h (iscanonical):
	Likewise.
	* sysdeps/powerpc/powerpc64le/Makefile
	(CFLAGS-test-math-iscanonical.cc): New variable.
 2017-10-03 16:01:37 -03:00
Szabolcs Nagy
f275f64e7e fix drem symbol for static linking and new targets 
The compat remainder code is no longer built for !LIBM_SVID_COMPAT targets,
but the legacy drem, dremf and dreml symbols should be still defined since
removing them may break existing code, so keep them as aliases in the
non-compat remainder code.

	* math/w_remainder.c: New file.
	* math/w_remainderf.c: New file.
	* math/w_remainderl.c: New file.
 2017-10-03 14:31:59 +01:00
Szabolcs Nagy
bdc5c59214 fix gamma symbol for static linking and new targets 
The lgamma compat code is no longer built for !LIBM_SVID_COMPAT targets,
but the legacy gamma, gammaf and gammal symbols should be still defined,
so make them aliases to the non-compat lgamma code.

	* math/w_lgamma.c: New file.
	* math/w_lgammaf.c: New file.
	* math/w_lgammal.c: New file.
 2017-10-02 17:33:13 +01:00
Szabolcs Nagy
72d3d28108 New symbol version for logf, log2f and powf without SVID compat 
This patch changes the logf, log2f and powf error handling semantics
to only set errno accoring to POSIX rules. New symbol version is
introduced at GLIBC_2.27.

The old wrappers are kept for compat symbols.

ia64 needed assembly change to have the new and compat versioned
symbol map to the same function.

All linux libm abilists are updated.

	* math/Versions (logf): New libm symbol at GLIBC_2.27.
	(log2f): Likewise.
	(powf): Likewise.
	* math/w_log2f.c: New file.
	* math/w_logf.c: New file.
	* math/w_powf.c: New file.
	* math/w_log2f_compat.c (__log2f_compat): For compat symbol only.
	* math/w_logf_compat.c (__logf_compat): Likewise.
	* math/w_powf_compat.c (__powf_compat): Likewise.
	* sysdeps/ia64/fpu/e_log2f.S: Add versioned symbols.
	* sysdeps/ia64/fpu/e_logf.S: Likewise.
	* sysdeps/ia64/fpu/e_powf.S: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
 2017-10-02 14:38:03 +01:00
Wilco Dijkstra
fffb150735 Remove old cimag inlines 
Remove old cimag inlines that are only used in GCC 2.96 or older.

	* math/bits/cmathcalls.h (cimag): Remove inline.
	(creal): Remove inline.
	(conj): Remove inline.
 2017-09-29 17:53:57 +01:00
Szabolcs Nagy
4ea49f4c08 New generic powf 
without wrapper on aarch64:
powf reciprocal-throughput: 4.2x faster
powf latency: 2.6x faster
old worst-case error: 1.11 ulp
new worst-case error: 0.82 ulp
aarch64 .text size: -780 bytes
aarch64 .rodata size: +144 bytes

powf(x,y) is implemented as exp2(y*log2(x)) with the same algorithms
that are used in exp2f and log2f, except that the log2f polynomial is
larger for extra precision and its output (and exp2f input) may be
scaled by a power of 2 (POWF_SCALE) to simplify the argument reduction
step of exp2 (possible when efficient round and convert toint operation
is available).

The special case handling tries to minimize the checks in the hot path.
When the input of exp2_inline is checked, int arithmetics is used as
that was faster on the tested aarch64 cores.

	* math/Makefile (type-float-routines): Add e_powf_log2_data.
	* sysdeps/ieee754/flt-32/e_powf.c: New implementation.
	* sysdeps/ieee754/flt-32/e_powf_log2_data.c: New file.
	* sysdeps/ieee754/flt-32/math_config.h (__powf_log2_data): Define.
	(issignalingf_inline): Likewise.
	(POWF_LOG2_TABLE_BITS): Likewise.
	(POWF_LOG2_POLY_ORDER): Likewise.
	(POWF_SCALE_BITS): Likewise.
	(POWF_SCALE): Likewise.
	* sysdeps/i386/fpu/e_powf_log2_data.c: New file.
	* sysdeps/ia64/fpu/e_powf_log2_data.c: New file.
	* sysdeps/m68k/m680x0/fpu/e_powf_log2_data.c: New file.
 2017-09-29 17:30:53 +01:00
Szabolcs Nagy
875c76c704 New generic log2f 
Similar to the new logf: double precision arithmetics and a small
lookup table is used. The argument reduction step is the same as in
the new logf.

without wrapper on aarch64:
log2f reciprocal-throughput: 2.3x faster
log2f latency: 2.1x faster
old worst case error: 1.72 ulp
new worst case error: 0.75 ulp
aarch64 .text size: -252 bytes
aarch64 .rodata size: +244 bytes

	* math/Makefile (type-float-routines): Add e_log2f_data.
	* sysdeps/ieee754/flt-32/e_log2f.c: New implementation.
	* sysdeps/ieee754/flt-32/e_log2f_data.c: New file.
	* sysdeps/ieee754/flt-32/math_config.h (__log2f_data): Define.
	(LOG2F_TABLE_BITS, LOG2F_POLY_ORDER): Define.
	* sysdeps/i386/fpu/e_log2f_data.c: New file.
	* sysdeps/ia64/fpu/e_log2f_data.c: New file.
	* sysdeps/m68k/m680x0/fpu/e_log2f_data.c: New file.
 2017-09-29 17:17:41 +01:00
Szabolcs Nagy
bf27d3973d New generic logf 
without wrapper on aarch64:
logf reciprocal-throughput: 2.2x faster
logf latency: 1.9x faster
old worst case error: 0.89 ulp
new worst case error: 0.82 ulp
aarch64 .text size: -356 bytes
aarch64 .rodata size: +240 bytes

Uses double precision arithmetics and a lookup table to allow smaller
polynomial and avoid the use of division.

Data is in a separate translation unit with fixed layout to prevent the
compiler generating suboptimal literal access.

Errors are handled inline according to POSIX rules, but this patch
keeps the wrapper with SVID compatible error handling.

Needs libm-test-ulps adjustment for clogf in non-nearest rounding mode.

	* math/Makefile (type-float-routines): Add e_logf_data.
	* sysdeps/ieee754/flt-32/e_logf.c: New implementation.
	* sysdeps/ieee754/flt-32/e_logf_data.c: New file.
	* sysdeps/ieee754/flt-32/math_config.h (__logf_data): Define.
	(LOGF_TABLE_BITS, LOGF_POLY_ORDER): Define.
	* sysdeps/i386/fpu/e_logf_data.c: New file.
	* sysdeps/ia64/fpu/e_logf_data.c: New file.
	* sysdeps/m68k/m680x0/fpu/e_logf_data.c: New file.
 2017-09-29 11:46:46 +01:00
Wilco Dijkstra
1e6d07234f Simplify C99 isgreater macros 
Simplify the C99 isgreater macros.  Although some support was added
in GCC 2.97, not all targets added support until GCC 3.1.  Therefore
only use the builtins in math.h from GCC 3.1 onwards, and defer to
generic macros otherwise.  Improve the generic isunordered macro
to use compares rather than call fpclassify twice - this is not only
faster but also correct for signaling NaNs.

	* math/math.h: Improve handling of C99 isgreater macros.
	* sysdeps/alpha/fpu/bits/mathinline.h: Remove isgreater macros.
	* sysdeps/m68k/m680x0/fpu/bits/mathinline.h: Likewise.
	* sysdeps/powerpc/bits/mathinline.h: Likewise.
	* sysdeps/sparc/fpu/bits/mathinline.h: Likewise.
	* sysdeps/x86/fpu/bits/mathinline.h: Likewise.
 2017-09-28 19:43:54 +01:00
Szabolcs Nagy
f5f0f52651 New expf and exp2f version without SVID compat wrapper 
This patch changes the expf and exp2f error handling semantics to only
set errno accoring to POSIX rules. New symbol version is introduced at
GLIBC_2.27.

The old wrappers are kept for compat symbols.

Internal calls to __expf now get the new error semantics, this seems to
only affect sysdeps/i386/fpu/s_expm1f.S where the errno-only behaviour
should be correct.

ia64 needed assembly change to have the new and compat versioned symbol
map to the same function.

All linux libm abilists are updated.

	* math/Versions (expf): New libm symbol at GLIBC_2.27.
	(exp2f): Likewise.
	* math/w_exp2f.c: New file.
	* math/w_expf.c: New file.
	* math/w_exp2f_compat.c (__exp2f_compat): For compat symbol only.
	* math/w_expf_compat.c (__expf_compat): Likewise.
	* sysdeps/ia64/fpu/e_exp2f.S: Add versioned symbols.
	* sysdeps/ia64/fpu/e_expf.S: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
 2017-09-25 10:45:08 +01:00
Szabolcs Nagy
72aa623345 Optimized generic expf and exp2f with wrappers 
Based on new expf and exp2f code from
https://github.com/ARM-software/optimized-routines/

with wrapper on aarch64:
expf reciprocal-throughput: 2.3x faster
expf latency: 1.7x faster
without wrapper on aarch64:
expf reciprocal-throughput: 3.3x faster
expf latency: 1.7x faster
without wrapper on aarch64:
exp2f reciprocal-throughput: 2.8x faster
exp2f latency: 1.3x faster
libm.so size on aarch64:
.text size: -152 bytes
.rodata size: -1740 bytes
expf/exp2f worst case nearest rounding error: 0.502 ulp
worst case non-nearest rounding error: 1 ulp

Error checks are inline and errno setting is in separate tail called
functions, but the wrappers are kept in this patch to handle the
_LIB_VERSION==_SVID_ case.  (So e.g. errno is set twice for expf calls
and once for __expf_finite calls on targets where the new code is used.)

Double precision arithmetics is used which is expected to be faster on
most targets (including soft-float) than using single precision and it
is easier to get good precision result with it.

Const data is kept in a separate translation unit which complicates
maintenance a bit, but is expected to give good code for literal loads
on most targets and allows sharing data across expf, exp2f and powf.
(This data is disabled on i386, m68k and ia64 which have their own
expf, exp2f and powf code.)

Some details may need target specific tweaks:
- best convert and round to int operation in the arg reduction may be
different across targets.
- code was optimized on fma target, optimal polynomial eval may be
different without fma.
- gcc does not always generate good code for fp bit representation
access via unions or it may be inherently slow on some targets.

The libm-test-ulps will need adjustment because..
- The argument reduction ideally uses nearest rounded rint, but that is
not efficient on most targets, so the polynomial can get evaluated on a
wider interval in non-nearest rounding mode making 1 ulp errors common
in that case.
- The polynomial is evaluated such that it may have 1 ulp error on
negative tiny inputs with upward rounding.

	* math/Makefile (type-float-routines): Add math_errf and e_exp2f_data.
	* sysdeps/aarch64/fpu/math_private.h (TOINT_INTRINSICS): Define.
	(roundtoint, converttoint): Likewise.
	* sysdeps/ieee754/flt-32/e_expf.c: New implementation.
	* sysdeps/ieee754/flt-32/e_exp2f.c: New implementation.
	* sysdeps/ieee754/flt-32/e_exp2f_data.c: New file.
	* sysdeps/ieee754/flt-32/math_config.h: New file.
	* sysdeps/ieee754/flt-32/math_errf.c: New file.
	* sysdeps/ieee754/flt-32/t_exp2f.h: Remove.
	* sysdeps/i386/fpu/e_exp2f_data.c: New file.
	* sysdeps/i386/fpu/math_errf.c: New file.
	* sysdeps/ia64/fpu/e_exp2f_data.c: New file.
	* sysdeps/ia64/fpu/math_errf.c: New file.
	* sysdeps/m68k/m680x0/fpu/e_exp2f_data.c: New file.
	* sysdeps/m68k/m680x0/fpu/math_errf.c: New file.
 2017-09-25 10:44:39 +01:00
Gabriel F. T. Gomes
c5c4a62609 Let fpclassify use the builtin when optimizing for size in C++ mode (bug 22146) 
When optimization for size is on (-Os), fpclassify does not use the
type-generic __builtin_fpclassify builtin, instead it uses __MATH_TG.
However, when library support for float128 is available, __MATH_TG uses
__builtin_types_compatible_p, which is not available in C++ mode.

On the other hand, libstdc++ undefines (in cmath) many macros from
math.h, including fpclassify, so that it can provide its own functions.
However, during its configure tests, libstdc++ just tests for the
availability of the macros (it does not undefine them, nor does it
provide its own functions).

Finally, when libstdc++ is configured with optimization for size
enabled, its configure tests include math.h and get the definition of
fpclassify that uses __MATH_TG (and __builtin_types_compatible_p).
Since libstdc++ does not undefine the macros during its configure tests,
they fail.

This patch lets fpclassify use the builtin in C++ mode, even when
optimization for size is on.  This allows the configure test in
libstdc++ to work.

Tested for powerpc64le and x86_64.

	[BZ #22146]
	math/math.h: Let fpclassify use the builtin in C++ mode, even
	when optimazing for size.
 2017-09-22 14:47:16 -03:00
Joseph Myers
92892fdbfa Use libm_alias_ldouble in math/. 
This patch converts libm function implementations in math/ from using
weak_alias to using libm_alias_ldouble to define public function
names, in cases where it would be appropriate to define _Float128 /
_Float64x aliases for those functions as well (in cases where either
or both of those types exist and have the same ABI as long double).
This eliminates many ldbl-opt wrappers round these function
implementations.

Tested for x86_64, and with build-many-glibcs.py.  All installed
stripped shared libraries are unchanged except for libm.so on
powerpc64le.  As noted for a previous patch, powerpc64le's use of
ldbl-opt means various long double functions get defined using
long_double_symbol which gives them an explicit symbol version in the
object files, and this patch results in some such functions using
weak_alias instead (because powerpc64le never had a previous version
of these functions for long double = double); both produce a valid
libm.so with the same public symbols at the same versions, but macros
expanding to call weak_alias is cleaner in this case.

	* math/s_fmal.c: Include <libm-alias-ldouble.h>.
	(fmal): Define using libm_alias_ldouble.
	* math/w_acoshl_compat.c: Include <libm-alias-ldouble.h>.
	(acoshl): Define using libm_alias_ldouble.
	* math/w_acosl_compat.c: Include <libm-alias-ldouble.h>.
	(acosl): Define using libm_alias_ldouble.
	* math/w_asinl_compat.c: Include <libm-alias-ldouble.h>.
	(asinl): Define using libm_alias_ldouble.
	* math/w_atan2l_compat.c: Include <libm-alias-ldouble.h>.
	(atan2l): Define using libm_alias_ldouble.
	* math/w_atanhl_compat.c: Include <libm-alias-ldouble.h>.
	(atanhl): Define using libm_alias_ldouble.
	* math/w_coshl_compat.c: Include <libm-alias-ldouble.h>.
	(coshl): Define using libm_alias_ldouble.
	* math/w_exp10l_compat.c: Include <libm-alias-ldouble.h>.
	(exp10l): Define using libm_alias_ldouble.
	* math/w_exp2l_compat.c: Include <libm-alias-ldouble.h>.
	(exp2l): Define using libm_alias_ldouble.
	* math/w_expl_compat.c: Include <libm-alias-ldouble.h>.
	(expl): Define using libm_alias_ldouble.
	* math/w_fmodl_compat.c: Include <libm-alias-ldouble.h>.
	(fmodl): Define using libm_alias_ldouble.
	* math/w_hypotl_compat.c: Include <libm-alias-ldouble.h>.
	(hypotl): Define using libm_alias_ldouble.
	* math/w_j0l_compat.c: Include <libm-alias-ldouble.h>.
	(j0l): Define using libm_alias_ldouble.
	(y0l): Likewise.
	* math/w_j1l_compat.c: Include <libm-alias-ldouble.h>.
	(j1l): Define using libm_alias_ldouble.
	(y1l): Likewise.
	* math/w_jnl_compat.c: Include <libm-alias-ldouble.h>.
	(jnl): Define using libm_alias_ldouble.
	(ynl): Likewise.
	* math/w_log10l_compat.c: Include <libm-alias-ldouble.h>.
	(log10l): Define using libm_alias_ldouble.
	* math/w_log2l_compat.c: Include <libm-alias-ldouble.h>.
	(log2l): Define using libm_alias_ldouble.
	* math/w_logl_compat.c: Include <libm-alias-ldouble.h>.
	(logl): Define using libm_alias_ldouble.
	* math/w_powl_compat.c: Include <libm-alias-ldouble.h>.
	(powl): Define using libm_alias_ldouble.
	* math/w_remainderl_compat.c: Include <libm-alias-ldouble.h>.
	(remainderl): Define using libm_alias_ldouble.
	* math/w_sinhl_compat.c: Include <libm-alias-ldouble.h>.
	(sinhl): Define using libm_alias_ldouble.
	* math/w_sqrtl_compat.c: Include <libm-alias-ldouble.h>.
	(sqrtl): Define using libm_alias_ldouble.
	* math/w_tgammal_compat.c: Include <libm-alias-ldouble.h>.
	(tgammal): Define using libm_alias_ldouble.
	* sysdeps/ieee754/ldbl-opt/w_exp10l_compat.c [LIBM_SVID_COMPAT]
	(exp10l): Do not use long_double_symbol here.
	* sysdeps/ieee754/ldbl-opt/w_remainderl_compat.c
	[LIBM_SVID_COMPAT] (remainderl): Likewise.
	* sysdeps/ieee754/ldbl-opt/s_fmal.c: Remove.
	* sysdeps/ieee754/ldbl-opt/w_acoshl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_acosl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_asinl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_atan2l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_atanhl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_coshl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_expl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_fmodl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_hypotl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_j0l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_j1l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_jnl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_log10l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_log2l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_logl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_powl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_sinhl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_sqrtl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_tgammal_compat.c: Likewise.
 2017-09-18 17:51:33 +00:00
Joseph Myers
9ac4470888 Use libm_alias_double in math/. 
This patch converts libm function implementations in math/ from using
weak_alias to using libm_alias_double to define public function names,
in cases where it would be appropriate to define _Float64 / _Float32x
aliases for those functions as well.  This eliminates many
NO_LONG_DOUBLE conditionals and ldbl-opt wrappers round these function
implementations.

Tested for x86_64.  Also tested with build-many-glibcs.py.  Binary
differences seen are that the different order in which remainder and
drem symbols get defined as a result of this patch (the same source
file defines the same aliases, but in a different order of definition)
changes the order of symbols in the final libm.so when long double =
double, and for ldbl-opt configurations, the compat symbols for Bessel
functions were previously defined by e.g. "compat_symbol (libm, j0,
j0l, GLIBC_2_0)", which declares j0l as a compat symbol based on j0
and so makes j0l weak because j0 is weak, and are now defined
(indirectly via the relevant macros) based on e.g. __j0, so are no
longer weak because __j0 isn't weak.

	* math/s_fma.c: Include <libm-alias-double.h>.
	(fma): Define using libm_alias_double.
	* math/s_nextafter.c: Include <libm-alias-double.h>.
	(nextafter): Define using libm_alias_double.
	* math/w_acos_compat.c: Include <libm-alias-double.h>.
	(acos): Define using libm_alias_double.
	* math/w_acosh_compat.c: Include <libm-alias-double.h>.
	(aocsh): Define using libm_alias_double.
	* math/w_asin_compat.c: Include <libm-alias-double.h>.
	(asin): Define using libm_alias_double.
	* math/w_atan2_compat.c: Include <libm-alias-double.h>.
	(atan2): Define using libm_alias_double.
	* math/w_atanh_compat.c: Include <libm-alias-double.h>.
	(atanh): Define using libm_alias_double.
	* math/w_cosh_compat.c: Include <libm-alias-double.h>.
	(cosh): Define using libm_alias_double.
	* math/w_exp10_compat.c: Include <libm-alias-double.h>.
	(exp10): Define using libm_alias_double.
	* math/w_exp2_compat.c: Include <libm-alias-double.h>.
	(exp2): Define using libm_alias_double.
	* math/w_exp_compat.c: Include <libm-alias-double.h>.
	(exp): Define using libm_alias_double.
	* math/w_fmod_compat.c: Include <libm-alias-double.h>.
	(fmod): Define using libm_alias_double.
	* math/w_hypot_compat.c: Include <libm-alias-double.h>.
	(hypot): Define using libm_alias_double.
	* math/w_j0_compat.c: Include <libm-alias-double.h>.
	(j0): Define using libm_alias_double.
	(y0): Likewise.
	* math/w_j1_compat.c: Include <libm-alias-double.h>.
	(j1): Define using libm_alias_double.
	(y1): Likewise.
	* math/w_jn_compat.c: Include <libm-alias-double.h>.
	(jn): Define using libm_alias_double.
	(yn): Likewise.
	* math/w_log10_compat.c: Include <libm-alias-double.h>.
	(log10): Define using libm_alias_double.
	* math/w_log2_compat.c: Include <libm-alias-double.h>.
	(log2): Define using libm_alias_double.
	* math/w_log_compat.c: Include <libm-alias-double.h>.
	(log): Define using libm_alias_double.
	* math/w_pow_compat.c: Include <libm-alias-double.h>.
	(pow): Define using libm_alias_double.
	* math/w_remainder_compat.c: Include <libm-alias-double.h>.
	(remainder): Define using libm_alias_double.
	* math/w_sinh_compat.c: Include <libm-alias-double.h>.
	(sinh): Define using libm_alias_double.
	* math/w_sqrt_compat.c: Include <libm-alias-double.h>.
	(sqrt): Define using libm_alias_double.
	* math/w_tgamma_compat.c: Include <libm-alias-double.h>.
	(tgamma): Define using libm_alias_double.
	* sysdeps/ieee754/ldbl-opt/s_nextafter.c [LONG_DOUBLE_COMPAT(libm,
	GLIBC_2_0)] (nextafterl): Do not define compat symbol here.
	* sysdeps/ieee754/ldbl-opt/w_exp10_compat.c
	[LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)] (exp10l): Likewise.
	* sysdeps/ieee754/ldbl-opt/w_remainder_compat.c
	[LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)] (remainderl): Likewise.
	* sysdeps/ieee754/ldbl-opt/w_acos_compat.c: Remove.
	* sysdeps/ieee754/ldbl-opt/w_acosh_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_asin_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_atan2_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_atanh_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_cosh_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_exp_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_fmod_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_hypot_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_j0_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_j1_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_jn_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_log10_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_log2_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_log_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_pow_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_sinh_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_sqrt_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_tgamma_compat.c: Likewise.
 2017-09-15 23:10:02 +00:00
Joseph Myers
c67a2328c8 Remove ENOSYS math/ function stubs. 
The math/ directory has various stub implementations of functions
(generally long double functions, plus sqrtf128) that set errno to
ENOSYS and print a message.

These are a relic of when the long double libm implementation in glibc
was originally incomplete.  They are only present for a limited set of
libm functions, not all those that would need implementing for any
hypothetical new long double format, and only for long double (plus
sqrtf128), not for other floating-point types.  I removed the
corresponding ENOSYS tests in the testsuite in
<https://sourceware.org/ml/libc-alpha/2013-05/msg00599.html>.

I think these stubs are an inherently different case from stubs for
functionality needing OS-specific implementations, since
floating-point formats are generally standardized between modern
processors (a new long double format does not seem likely - I'd expect
new ports all to have long double = binary128 or long double =
binary64 - though _Float16 functions *f16 are entirely possible in
future) and libm functions are generally only expected to fail for
domain / range / pole errors, not for other unknown system-specific
conditions the way the functions needing OS-specific implementations
may fail.

This patch removes these stub implementations.  The effect (which, as
noted above, was actually mostly already the case, given the
incompleteness of the set of stubs, and was certainly the case if you
wanted your libm port to *work* rather than just build) is that any
new long double format needs to provide a full set of functions for
the build to succeed; any port using ldbl-128 needs to provide sqrtl
(possibly using the soft-fp version from another port); any port using
ldbl-96 needs to provide all those functions that all of
x86_64/i386/ia64/m68k provide rather than getting from the ldbl-96
directory; any port with _Float128 as a type with a distinct format
needs to provide sqrtf128.

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

	* math/e_acoshl.c: Remove.
	* math/e_acosl.c: Likewise.
	* math/e_asinl.c: Likewise.
	* math/e_atan2l.c: Likewise.
	* math/e_atanhl.c: Likewise.
	* math/e_coshl.c: Likewise.
	* math/e_expl.c: Likewise.
	* math/e_fmodl.c: Likewise.
	* math/e_gammal_r.c: Likewise.
	* math/e_hypotl.c: Likewise.
	* math/e_j0l.c: Likewise.
	* math/e_j1l.c: Likewise.
	* math/e_jnl.c: Likewise.
	* math/e_lgammal_r.c: Likewise.
	* math/e_log10l.c: Likewise.
	* math/e_log2l.c: Likewise.
	* math/e_logl.c: Likewise.
	* math/e_powl.c: Likewise.
	* math/e_rem_pio2l.c: Likewise.
	* math/e_sinhl.c: Likewise.
	* math/e_sqrtf128.c: Likewise.
	* math/e_sqrtl.c: Likewise.
	* math/k_cosl.c: Likewise.
	* math/k_sinl.c: Likewise.
	* math/k_tanl.c: Likewise.
	* math/s_asinhl.c: Likewise.
	* math/s_atanl.c: Likewise.
	* math/s_cbrtl.c: Likewise.
	* math/s_erfl.c: Likewise.
	* math/s_expm1l.c: Likewise.
	* math/s_log1pl.c: Likewise.
	* math/s_tanhl.c: Likewise.
 2017-09-15 20:05:09 +00:00
Joseph Myers
5bcdb31529 Use libm_alias_float in math/. 
This patch converts libm function implementations in math/ from using
weak_alias to using libm_alias_float to define public function names,
in cases where it would be appropriate to define _Float32 aliases for
those functions as well.  expf and exp2f are omitted from this patch,
given the in-progress patches that would change their symbol
versioning arrangements (at a later stage it will be necessary to add
macros that can be used for functions with such symbol versioning
arrangements - which will apply to lgammaf as well - but for the
initial patches in this area I'm just dealing with easy cases, and any
symbol versioning changes to these functions while the work is in
progress can effectively just undo the libm_alias_* changes as regards
those functions).

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

	* math/s_fmaf.c: Include <libm-alias-float.h>.
	(fmaf): Define using libm_alias_float.
	* math/w_acosf_compat.c: Include <libm-alias-float.h>.
	(acosf): Define using libm_alias_float.
	* math/w_acoshf_compat.c: Include <libm-alias-float.h>.
	(acoshf): Define using libm_alias_float.
	* math/w_asinf_compat.c: Include <libm-alias-float.h>.
	(asinf): Define using libm_alias_float.
	* math/w_atan2f_compat.c: Include <libm-alias-float.h>.
	(atan2f): Define using libm_alias_float.
	* math/w_atanhf_compat.c: Include <libm-alias-float.h>.
	(atanhf): Define using libm_alias_float.
	* math/w_coshf_compat.c: Include <libm-alias-float.h>.
	(coshf): Define using libm_alias_float.
	* math/w_exp10f_compat.c: Include <libm-alias-float.h>.
	(exp10f): Define using libm_alias_float.
	* math/w_fmodf_compat.c: Include <libm-alias-float.h>.
	(fmodf): Define using libm_alias_float.
	* math/w_hypotf_compat.c: Include <libm-alias-float.h>.
	(hypotf): Define using libm_alias_float.
	* math/w_j0f_compat.c: Include <libm-alias-float.h>.
	(j0f): Define using libm_alias_float.
	(y0f): Likewise.
	* math/w_j1f_compat.c: Include <libm-alias-float.h>.
	(j1f): Define using libm_alias_float.
	(y1f): Likewise.
	* math/w_jnf_compat.c: Include <libm-alias-float.h>.
	(jnf): Define using libm_alias_float.
	(ynf): Likewise.
	* math/w_log10f_compat.c: Include <libm-alias-float.h>.
	(log10f): Define using libm_alias_float.
	* math/w_log2f_compat.c: Include <libm-alias-float.h>.
	(log2f): Define using libm_alias_float.
	* math/w_logf_compat.c: Include <libm-alias-float.h>.
	(logf): Define using libm_alias_float.
	* math/w_powf_compat.c: Include <libm-alias-float.h>.
	(powf): Define using libm_alias_float.
	* math/w_remainderf_compat.c: Include <libm-alias-float.h>.
	(remainderf): Define using libm_alias_float.
	* math/w_sinhf_compat.c: Include <libm-alias-float.h>.
	(sinhf): Define using libm_alias_float.
	* math/w_sqrtf_compat.c: Include <libm-alias-float.h>.
	(sqrtf): Define using libm_alias_float.
	* math/w_tgammaf_compat.c: Include <libm-alias-float.h>.
	(tgammaf): Define using libm_alias_float.
 2017-09-15 17:12:02 +00:00
Joseph Myers
01f2881245 Make more libm functions into weak aliases. 
Many libm functions define the function as __<func> and then define
<func> as a weak alias.  This is not at all limited to cases where
there is an internal call that has namespace reasons to need to call
__<func> instead of <func>.

The common macros for creating libm function aliases work on the basis
of public function names all being aliases; that is, they define
aliases for functions using the above pattern.  Thus, where a function
just defines the public name <func> directly, changing that to be a
weak alias enables a subsequent conversion to the common macros to
retain the exact existing symbols (and so be testable by comparison of
stripped binaries).

This patch converts many existing functions to use the weak alias
pattern, as preparation for subsequent conversions to common macros.
I do expect that _FloatN/_FloatNx function aliases will end up needing
new variants of the common macros that do *not* create the original
float / double / long double name of a function - for cases where that
name is created specially to give it a particular symbol version, for
example - but for functions that can use the most common macros to
create all the public names as aliases, it makes sense for them to do
so.

Regarding the Bessel function wrappers in this patch: only float and
double wrappers are changed because the long double wrappers already
used the weak alias pattern.

Tested for x86_64, and with build-many-glibcs.py.

	* include/math.h (roundeven): Change hidden_proto call to
	__roundeven.
	* math/w_j0_compat.c (j0): Rename to __j0 and define as weak
	alias.
	[NO_LONG_DOUBLE] (__j0l): New strong alias.
	(y0): Rename to __y0 and define as weak alias.
	[NO_LONG_DOUBLE] (__y0l): New strong alias.
	* math/w_j0f_compat.c (j0f): Rename to __j0f and define as weak
	alias.
	(y0f): Rename to __y0f and define as weak alias.
	* math/w_j1_compat.c (j1): Rename to __j1 and define as weak
	alias.
	[NO_LONG_DOUBLE] (__j1l): New strong alias.
	(y1): Rename to __y1 and define as weak alias.
	[NO_LONG_DOUBLE] (__y1l): New strong alias.
	* math/w_j1f_compat.c (j1f): Rename to __j1f and define as weak
	alias.
	(y1f): Rename to __y1f and define as weak alias.
	* math/w_jn_compat.c (jn): Rename to __jn and define as weak
	alias.
	[NO_LONG_DOUBLE] (__jnl): New strong alias.
	(yn): Rename to __yn and define as weak alias.
	[NO_LONG_DOUBLE] (__ynl): New strong alias.
	* math/w_jnf_compat.c (jnf): Rename to __jnf and define as weak
	alias.
	(ynf): Rename to __ynf and define as weak alias.
	* sysdeps/ieee754/dbl-64/s_fromfp.c (FUNC): Define to __fromfp.
	(fromfp): Define as weak alias.
	[NO_LONG_DOUBLE] (__fromfpl): New strong alias.
	* sysdeps/ieee754/dbl-64/s_fromfpx.c (FUNC): Define to __fromfpx.
	(fromfpx): Define as weak alias.
	[NO_LONG_DOUBLE] (__fromfpxl): New strong alias.
	* sysdeps/ieee754/dbl-64/s_getpayload.c (getpayload): Rename to
	__getpayload and define as weak alias.
	[NO_LONG_DOUBLE] (__getpayloadl): New strong alias.
	* sysdeps/ieee754/dbl-64/s_roundeven.c (roundeven): Rename to
	__roundeven and define as weak alias.
	[NO_LONG_DOUBLE] (__roundevenl): New strong alias.
	* sysdeps/ieee754/dbl-64/s_setpayload.c (FUNC): Define to
	__setpayload.
	(setpayload): Define as weak alias.
	[NO_LONG_DOUBLE] (__setpayloadl): New strong alias.
	* sysdeps/ieee754/dbl-64/s_setpayloadsig.c (FUNC): Define to
	__setpayloadsig.
	(setpayloadsig): Define as weak alias.
	[NO_LONG_DOUBLE] (__setpayloadsigl): New strong alias.
	* sysdeps/ieee754/dbl-64/s_totalorder.c (totalorder): Rename to
	__totalorder and define as weak alias.
	[NO_LONG_DOUBLE] (__totalorderl): New strong alias.
	* sysdeps/ieee754/dbl-64/s_totalordermag.c (totalordermag): Rename
	to __totalordermag and define as weak alias.
	[NO_LONG_DOUBLE] (__totalordermagl): New strong alias.
	* sysdeps/ieee754/dbl-64/s_ufromfp.c (FUNC): Define to __ufromfp.
	(ufromfp): Define as weak alias.
	[NO_LONG_DOUBLE] (__ufromfpl): New strong alias.
	* sysdeps/ieee754/dbl-64/s_ufromfpx.c (FUNC): Define to
	__ufromfpx.
	(ufromfpx): Define as weak alias.
	[NO_LONG_DOUBLE] (__ufromfpxl): New strong alias.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_getpayload.c (getpayload):
	Rename to __getpayload and define as weak alias.
	[NO_LONG_DOUBLE] (__getpayloadl): New strong alias.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_roundeven.c (roundeven):
	Rename to __roundeven and define as weak alias.
	[NO_LONG_DOUBLE] (__roundevenl): New strong alias.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c (totalorder):
	Rename to __totalorder and define as weak alias.
	[NO_LONG_DOUBLE] (__totalorderl): New strong alias.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_totalordermag.c
	(totalordermag): Rename to __totalordermag and define as weak
	alias.
	[NO_LONG_DOUBLE] (__totalordermagl): New strong alias.
	* sysdeps/ieee754/float128/float128_private.h (__getpayloadl): New
	macro.
	(__roundevenl): Likewise.
	(__totalorderl): Likewise.
	(__totalordermagl): Likewise
	* sysdeps/ieee754/float128/s_fromfpf128.c (FUNC): Define to
	__fromfpf128.
	(fromfpf128): Define as weak alias.
	* sysdeps/ieee754/float128/s_fromfpxf128.c (FUNC): Define to
	__fromfpxf128.
	(fromfpxf128): Define as weak alias.
	* sysdeps/ieee754/float128/s_setpayloadf128.c (FUNC): Define to
	__setpayloadf128.
	(setpayloadf128): Define as weak alias.
	* sysdeps/ieee754/float128/s_setpayloadsigf128.c (FUNC): Define to
	__setpayloadsigf128.
	(setpayloadsigf128): Define as weak alias.
	* sysdeps/ieee754/float128/s_ufromfpf128.c (FUNC): Define to
	__ufromfpf128.
	(ufromfpf128): Define as weak alias.
	* sysdeps/ieee754/float128/s_ufromfpxf128.c (FUNC): Define to
	__ufromfpxf128.
	(ufromfpxf128): Define as weak alias.
	* sysdeps/ieee754/flt-32/s_fromfpf.c (FUNC): Define to __fromfpf.
	(fromfpf): Define as weak alias.
	* sysdeps/ieee754/flt-32/s_fromfpxf.c (FUNC): Define to
	__fromfpxf.
	(fromfpxf): Define as weak alias.
	* sysdeps/ieee754/flt-32/s_getpayloadf.c (getpayloadf): Rename to
	__getpayloadf and define as weak alias.
	* sysdeps/ieee754/flt-32/s_roundevenf.c (roundevenf): Rename to
	__roundevenf and define as weak alias.
	* sysdeps/ieee754/flt-32/s_setpayloadf.c (FUNC): Define to
	__setpayloadf.
	(setpayloadf): Define as weak alias.
	* sysdeps/ieee754/flt-32/s_setpayloadsigf.c (FUNC): Define to
	__setpayloadsigf.
	(setpayloadsigf): Define as weak alias.
	* sysdeps/ieee754/flt-32/s_totalorderf.c (totalorderf): Rename to
	__totalorderf and define as weak alias.
	* sysdeps/ieee754/flt-32/s_totalordermagf.c (totalordermagf):
	Rename to __totalordermagf and define as weak alias.
	* sysdeps/ieee754/flt-32/s_ufromfpf.c (FUNC): Define to
	__ufromfpf.
	(ufromfpf): Define as weak alias.
	* sysdeps/ieee754/flt-32/s_ufromfpxf.c (FUNC): Define to
	__ufromfpxf.
	(ufromfpxf): Define as weak alias.
	* sysdeps/ieee754/ldbl-128/s_fromfpl.c (FUNC): Define to
	__fromfpl.
	(fromfpl): Define as weak alias.
	* sysdeps/ieee754/ldbl-128/s_fromfpxl.c (FUNC): Define to
	__fromfpxl.
	(fromfpxl): Define as weak alias.
	* sysdeps/ieee754/ldbl-128/s_getpayloadl.c (getpayloadl): Rename
	to __getpayloadl and define as weak alias.
	* sysdeps/ieee754/ldbl-128/s_roundevenl.c (roundevenl): Rename to
	__roundevenl and define as weak alias.
	* sysdeps/ieee754/ldbl-128/s_setpayloadl.c (FUNC): Define to
	__setpayloadl.
	(setpayloadl): Define as weak alias.
	* sysdeps/ieee754/ldbl-128/s_setpayloadsigl.c (FUNC): Define to
	__setpayloadsigl.
	(setpayloadsigl): Define as weak alias.
	* sysdeps/ieee754/ldbl-128/s_totalorderl.c (totalorderl): Rename
	to __totalorderl and define as weak alias.
	* sysdeps/ieee754/ldbl-128/s_totalordermagl.c (totalordermagl):
	Rename to __totalordermagl and define as weak alias.
	* sysdeps/ieee754/ldbl-128/s_ufromfpl.c (FUNC): Define to
	__ufromfpl.
	(ufromfpl): Define as weak alias.
	* sysdeps/ieee754/ldbl-128/s_ufromfpxl.c (FUNC): Define to
	__ufromfpxl.
	(ufromfpxl): Define as weak alias.
	* sysdeps/ieee754/ldbl-128ibm/s_fromfpl.c (FUNC): Define to
	__fromfpl.
	(fromfpl): Define as weak alias.
	* sysdeps/ieee754/ldbl-128ibm/s_fromfpxl.c (FUNC): Define to
	__fromfpxl.
	(fromfpxl): Define as weak alias.
	* sysdeps/ieee754/ldbl-128ibm/s_getpayloadl.c (getpayloadl):
	Rename to __getpayloadl and define as weak alias.
	* sysdeps/ieee754/ldbl-128ibm/s_roundevenl.c (roundevenl): Rename
	to __roundevenl and define as weak alias.  Call __roundeven
	instead of roundeven.
	* sysdeps/ieee754/ldbl-128ibm/s_setpayloadl.c (FUNC): Define to
	__setpayloadl.
	(setpayloadl): Define as weak alias.
	* sysdeps/ieee754/ldbl-128ibm/s_setpayloadsigl.c (FUNC): Define to
	__setpayloadsigl.
	(setpayloadsigl): Define as weak alias.
	* sysdeps/ieee754/ldbl-128ibm/s_totalorderl.c (totalorderl):
	Rename to __totalorderl and define as weak alias.
	* sysdeps/ieee754/ldbl-128ibm/s_totalordermagl.c (totalordermagl):
	Rename to __totalordermagl and define as weak alias.
	* sysdeps/ieee754/ldbl-128ibm/s_ufromfpl.c (FUNC): Define to
	__ufromfpl.
	(ufromfpl): Define as weak alias.
	* sysdeps/ieee754/ldbl-128ibm/s_ufromfpxl.c (FUNC): Define to
	__ufromfpxl.
	(ufromfpxl): Define as weak alias.
	* sysdeps/ieee754/ldbl-96/s_fromfpl.c (FUNC): Define to
	__fromfpl.
	(fromfpl): Define as weak alias.
	* sysdeps/ieee754/ldbl-96/s_fromfpxl.c (FUNC): Define to
	__fromfpxl.
	(fromfpxl): Define as weak alias.
	* sysdeps/ieee754/ldbl-96/s_getpayloadl.c (getpayloadl): Rename to
	__getpayloadl and define as weak alias.
	* sysdeps/ieee754/ldbl-96/s_roundevenl.c (roundevenl): Rename to
	__roundevenl and define as weak alias.
	* sysdeps/ieee754/ldbl-96/s_setpayloadl.c (FUNC): Define to
	__setpayloadl.
	(setpayloadl): Define as weak alias.
	* sysdeps/ieee754/ldbl-96/s_setpayloadsigl.c (FUNC): Define to
	__setpayloadsigl.
	(setpayloadsigl): Define as weak alias.
	* sysdeps/ieee754/ldbl-96/s_totalorderl.c (totalorderl): Rename to
	__totalorderl and define as weak alias.
	* sysdeps/ieee754/ldbl-96/s_totalordermagl.c (totalordermagl):
	Rename to __totalordermagl and define as weak alias.
	* sysdeps/ieee754/ldbl-96/s_ufromfpl.c (FUNC): Define to
	__ufromfpl.
	(ufromfpl): Define as weak alias.
	* sysdeps/ieee754/ldbl-96/s_ufromfpxl.c (FUNC): Define to
	__ufromfpxl.
	(ufromfpxl): Define as weak alias.
 2017-09-14 22:28:53 +00:00
Szabolcs Nagy
bcea7ad608 Move exp compat wrappers under math/ 
Move exp compat wrappers to math/w_exp{,f,l}_compat.c to be
consistent with other wrappers.

	* sysdeps/ieee754/dbl-64/w_exp_compat.c: Move to...
	* math/w_exp_compat.c: ... here.
	* sysdeps/ieee754/flt-32/w_expf_compat.c: Move to...
	* math/w_expf_compat.c: ... here.
	* sysdeps/ieee754/ldbl-128/w_expl_compat.c: Move to...
	* math/w_expl_compat.c: ... here.
	* sysdeps/ieee754/ldbl-128ibm/w_expl_compat.c: Remove.
	* sysdeps/ieee754/ldbl-96/w_expl_compat.c: Remove.
	* sysdeps/ieee754/ldbl-opt/w_exp_compat.c: Use the new path.
	* sysdeps/ieee754/ldbl-opt/w_expl_compat.c: Likewise.
 2017-09-13 17:22:22 +01:00
Joseph Myers
0fc56478a9 Clear up log1p, ldexp, scalbn, scalbln compat handling. 
This patch cleans up how compat symbols / long double versioning are
handled for log1p, ldexp, scalbn and scalbln functions.

The general principle is to do as much as possible through the
type-generic templates.  Previously, when errno-setting wrappers were
added the compat long double symbols were left pointing directly to
the underlying implementations; they are moved to point to the
errno-setting wrappers.  For the functions also present in libc,
compat symbol handling for the libc copies needs to go in ldbl-opt
wrappers, but the type-generic templates can handle it for the libm
copies.  There is no need for w_scalbln_template.c to disable the
creation of an unused internal alias (such code made sense in the
context of patches trying to avoid any changes to generated code for
ease of comparison, but can be removed in a change that specifically
does intend to change details of where symbols point).

Tested for x86_64, and with build-many-glibcs.py.

	* math/w_scalbln_template.c (strong_alias): Do not undefine and
	redefine.
	* sysdeps/ieee754/ldbl-opt/s_ldexp.c (declare_mgen_alias): Remove
	macro.
	(ldexpl): Only define as compat symbol for libc, not libm.
	(scalbnl): Define as compat symbol for libc here.
	* sysdeps/ieee754/ldbl-opt/s_ldexpl.c (declare_mgen_alias): Only
	define for [IS_IN (libc)].
	(__ldexpl_2): Remove alias.
	(ldexpl): Only define with long_double_symbol if [IS_IN (libc)].
	(scalbnl): Likewise.  Use __wrap_scalbnl not __ldexpl_2 as base
	name in long_double_symbol call.
	* sysdeps/ieee754/ldbl-opt/s_log1p.c: Remove file.
	* sysdeps/ieee754/ldbl-opt/s_scalbln.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/s_scalbn.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_log1p.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_scalbln.c (declare_mgen_alias):
	Remove macro.
	[IS_IN (libc) && LONG_DOUBLE_COMPAT (libc, GLIBC_2_1)] (scalblnl):
	Define as compat symbol.
 2017-09-13 15:47:26 +00:00
Joseph Myers
620ff9eea6 Define and use libm_alias_double. 
Continuing the process of setting up common macros for libm function
aliases, with a view to using them to define _FloatN / _FloatNx
aliases in future, this patch adds a libm_alias_double macro and uses
it in the type-generic templates.

This macro handles defining aliases for double, and for long double in
the NO_LONG_DOUBLE case.  It also handles defining compat symbols for
long double = double for architectures that changed their long double
format.  By so doing, it eliminates the need for the
M_LIBM_NEED_COMPAT and declare_mgen_libm_compat macros; the single
declare_mgen_alias call in each template now suffices to define all
required compat symbols.  When used for more double functions (not
based on type-generic templates), I expect it will eliminate the need
for most ldbl-opt wrappers for such functions.

A few special cases are needed.  __clog10l is a public symbol (for
historical reasons) so needs to be given appropriate compat versions
for architectures that changed their long double format, but is not
defined as an alias using the normal macros since __clog10* are *not*
public symbols for _FloatN / _FloatNx types.  For scalbn, scalbln and
log1p, the changes adding errno setting support for those functions
left compat symbols pointing directly to the non-errno-setting
implementations.  There is no requirement for the compat symbols not
to set errno; that just made for the simplest patches at that time.
Now, with these common macros, it's natural to redirect the compat
symbols to the errno-setting wrappers, which I intend to do in a
separate patch.

Tested for x86_64, and with build-many-glibcs.py.  For ldbl-opt
platforms the stripped libm.so binaries are changed (disassembly
unchanged) because the details of how the clog10l compat symbol is
created mean it ceases to be weak as it was before; for other
platforms, stripped libm.so binaries are unchanged.

2017-09-13  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/generic/libm-alias-double.h: New file.
	* sysdeps/ieee754/ldbl-opt/libm-alias-double.h: Likewise.
	* sysdeps/generic/math-type-macros-double.h: Include
	<libm-alias-double.h>.
	[declare_mgen_alias] (declare_mgen_alias): Define to use
	libm_alias_double.
	* sysdeps/generic/math-type-macros.h [!M_LIBM_NEED_COMPAT]
	(M_LIBM_NEED_COMPAT): Remove macro.
	[!M_LIBM_NEED_COMPAT] (declare_mgen_libm_compat): Likewise.
	* sysdeps/ieee754/ldbl-opt/math-type-macros-double.h: Remove.
	* math/cabs_template.c [M_LIBM_NEED_COMPAT]: Remove conditional
	code.
	* math/carg_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/cimag_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/conj_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/creal_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_cacos_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_cacosh_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_casin_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_casinh_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_catan_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_catanh_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_ccos_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_ccosh_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_cexp_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_clog10_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_clog_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_cpow_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_cproj_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_csin_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_csinh_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_csqrt_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_ctan_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_ctanh_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_fdim_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_fmax_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_fmin_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/s_nan_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* math/w_ilogb_template.c [M_LIBM_NEED_COMPAT]: Likewise.
	* sysdeps/ieee754/ldbl-opt/s_clog10.c: New file.
	* sysdeps/ieee754/ldbl-opt/s_ldexp.c (M_LIBM_NEED_COMPAT): Remove
	macro.
	(declare_mgen_alias): New macro.
	* sysdeps/ieee754/ldbl-opt/w_log1p.c: New file.
	* sysdeps/ieee754/ldbl-opt/w_scalbln.c: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim-vis3.c
	(M_LIBM_NEED_COMPAT): Remove macro.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim.c
	[HAVE_AS_VIS3_SUPPORT]: Include <math_ldbl_opt.h> and
	<first-versions.h>.
	[HAVE_AS_VIS3_SUPPORT && LONG_DOUBLE_COMPAT (libm,
	FIRST_VERSION_libm_fdiml)]: Define fdiml as compat symbol.
 2017-09-13 01:13:30 +00:00
Joseph Myers
a891caff7a Remove declare_mgen_alias_2. 
The libm template machinery includes a macro declare_mgen_alias_2, to
define two function aliases rather than one.  This macro is only used
in one place, to define ldexp and scalbn, and only has one nondefault
definition, for double in the case where long double has the same
format.  That definition is because declare_mgen_alias for double, in
that case, defines <internal-func>l as an alias of <internal-func>, so
cannot be called twice for aliases of the same function.

Now, I suspect the <internal-func>l aliases are generally not needed
(with maybe a few exceptions such as __clog10l, which is an exported
function).  But even in the presence of them, there is no need for a
special declare_mgen_alias_2 macro for this case.  This patch
eliminates the need for such a macro by defining __wrap_scalbn<suffix>
as an alias of __ldexp<suffix>, and then using that when defining the
scalbn public aliases.  This is similar to how such internal aliases
are created for functions with multiple symbol versions, for example.

Tested for x86_64, and with build-many-glibcs.py.  (There *are* some
cases where installed stripped shared libraries change - not in the
generated code but because such changes to static symbols on input to
ld, even nonexported symbols that don't affect the code or dynamic
symbols, can affect the particular representation in the output of
string tables, hash tables etc.)

	* sysdeps/generic/math-type-macros.h [!declare_mgen_alias_2]
	(declare_mgen_alias_2): Remove.
	* sysdeps/generic/math-type-macros-double.h
	[NO_LONG_DOUBLE && !declare_mgen_alias_2] (declare_mgen_alias_2):
	Likewise.
	* math/s_ldexp_template.c (M_SUF (__wrap_scalbn)): Define strong
	alias.
	(ldexp): Define with declare_mgen_alias.
	(scalbn): Likewise.
 2017-09-12 20:00:00 +00:00
Joseph Myers
4f3647e46e Prefer new libm function wrappers for !LIBM_SVID_COMPAT. 
The initial obsoletion of SVID libm error handling left the old
wrappers and __kernel_standard still being used for new ports and
static linking, just with macro definitions of _LIB_VERSION and
matherr that meant symbols with those names were never actually used
and the code for different error handling variants could be optimized
out.

This patch cleans things up further by eliminating the
__kernel_standard use for new ports and static linking.  Now, the old
wrappers no longer generate any code in the !LIBM_SVID_COMPAT case,
while the new errno-only wrappers that were added for float128 support
are now also used for float, double and long double in that case.

The changes are generally straightforward.  The w_scalb*_compat
wrappers continue to be used (scalb is obsolescent in the sense of not
being supported for float128, but is present in supported standards -
the 2001 edition of POSIX and earlier XSI versions - so remains
supported for static linking and new ports, as do the float and long
double variants that are existing GNU extensions).  Those wrappers
would only call __kernel_standard in the _LIB_VERSION == _SVID_ case.
Since we would like to be able to compile most of glibc without
optimization, relying on a static function whose only use is under an
if (0) condition being optimized away to avoid an undefined
__kernel_standard reference may not be a good idea.  Thus, the
relevant code in the scalb wrappers has LIBM_SVID_COMPAT conditionals
added to guarantee it's not built at all in the case where
__kernel_standard does not exist.

Just as i386 has its own w_sqrt_compat.c, so w_sqrt.c is also added.
ia64 gets dummy w_*.c to prevent those files being built where they
would conflict with the ia64 libm, as with its existing w_*_compat.c.

Conditions disabling code for !LIBM_SVID_COMPAT are needed in both the
math/ wrappers and in the long double wrappers in ldbl-opt (to avoid
them setting up aliases and symbol versions for undefined symbols).  I
hope that future cleanups to how libm function aliases and symbol
versioning are done will eliminate the need for most of the ldbl-opt
wrappers.

Tested for x86_64 and x86, and with build-many-glibcs.py.

	* sysdeps/generic/math-type-macros-double.h: Include
	<math-svid-compat.h>.
	(__USE_WRAPPER_TEMPLATE): Define to !LIBM_SVID_COMPAT.
	* sysdeps/generic/math-type-macros-float.h: Include
	<math-svid-compat.h>.
	(__USE_WRAPPER_TEMPLATE): Define to !LIBM_SVID_COMPAT.
	* sysdeps/generic/math-type-macros-ldouble.h: Include
	<math-svid-compat.h>.
	(__USE_WRAPPER_TEMPLATE): Define to !LIBM_SVID_COMPAT.
	* math/lgamma-compat.h (BUILD_LGAMMA): Include LIBM_SVID_COMPAT
	condition.
	* math/w_acos_compat.c: Condition contents on [LIBM_SVID_COMPAT].
	* math/w_acosf_compat.c: Likewise.
	* math/w_acosh_compat.c: Likewise.
	* math/w_acoshf_compat.c: Likewise.
	* math/w_acoshl_compat.c: Likewise.
	* math/w_acosl_compat.c: Likewise.
	* math/w_asin_compat.c: Likewise.
	* math/w_asinf_compat.c: Likewise.
	* math/w_asinl_compat.c: Likewise.
	* math/w_atan2_compat.c: Likewise.
	* math/w_atan2f_compat.c: Likewise.
	* math/w_atan2l_compat.c: Likewise.
	* math/w_atanh_compat.c: Likewise.
	* math/w_atanhf_compat.c: Likewise.
	* math/w_atanhl_compat.c: Likewise.
	* math/w_cosh_compat.c: Likewise.
	* math/w_coshf_compat.c: Likewise.
	* math/w_coshl_compat.c: Likewise.
	* math/w_exp10_compat.c: Likewise.
	* math/w_exp10f_compat.c: Likewise.
	* math/w_exp10l_compat.c: Likewise.
	* math/w_exp2_compat.c: Likewise.
	* math/w_exp2f_compat.c: Likewise.
	* math/w_exp2l_compat.c: Likewise.
	* math/w_fmod_compat.c: Likewise.
	* math/w_fmodf_compat.c: Likewise.
	* math/w_fmodl_compat.c: Likewise.
	* math/w_hypot_compat.c: Likewise.
	* math/w_hypotf_compat.c: Likewise.
	* math/w_hypotl_compat.c: Likewise.
	* math/w_j0_compat.c: Likewise.
	* math/w_j0f_compat.c: Likewise.
	* math/w_j0l_compat.c: Likewise.
	* math/w_j1_compat.c: Likewise.
	* math/w_j1f_compat.c: Likewise.
	* math/w_j1l_compat.c: Likewise.
	* math/w_jn_compat.c: Likewise.
	* math/w_jnf_compat.c: Likewise.
	* math/w_jnl_compat.c: Likewise.
	* math/w_lgamma_r_compat.c: Likewise.
	* math/w_lgammaf_r_compat.c: Likewise.
	* math/w_lgammal_r_compat.c: Likewise.
	* math/w_log10_compat.c: Likewise.
	* math/w_log10f_compat.c: Likewise.
	* math/w_log10l_compat.c: Likewise.
	* math/w_log2_compat.c: Likewise.
	* math/w_log2f_compat.c: Likewise.
	* math/w_log2l_compat.c: Likewise.
	* math/w_log_compat.c: Likewise.
	* math/w_logf_compat.c: Likewise.
	* math/w_logl_compat.c: Likewise.
	* math/w_pow_compat.c: Likewise.
	* math/w_powf_compat.c: Likewise.
	* math/w_powl_compat.c: Likewise.
	* math/w_remainder_compat.c: Likewise.
	* math/w_remainderf_compat.c: Likewise.
	* math/w_remainderl_compat.c: Likewise.
	* math/w_sinh_compat.c: Likewise.
	* math/w_sinhf_compat.c: Likewise.
	* math/w_sinhl_compat.c: Likewise.
	* math/w_sqrt_compat.c: Likewise.
	* math/w_sqrtf_compat.c: Likewise.
	* math/w_sqrtl_compat.c: Likewise.
	* math/w_tgamma_compat.c: Likewise.
	* math/w_tgammaf_compat.c: Likewise.
	* math/w_tgammal_compat.c: Likewise.
	* math/w_scalb_compat.c (sysv_scalb): Condition definition on
	[LIBM_SVID_COMPAT].
	(__scalb): Condition call to sysv_scalb on [LIBM_SVID_COMPAT].
	* math/w_scalbf_compat.c (sysv_scalbf): Condition definition on
	[LIBM_SVID_COMPAT].
	(__scalbf): Condition call to sysv_scalbf on [LIBM_SVID_COMPAT].
	* math/w_scalbl_compat.c (sysv_scalbl): Condition definition on
	[LIBM_SVID_COMPAT].
	(__scalbl): Condition call to sysv_scalbl on [LIBM_SVID_COMPAT].
	* sysdeps/i386/fpu/w_sqrt.c: New file.
	* sysdeps/ia64/fpu/w_acos.c: Likewise.
	* sysdeps/ia64/fpu/w_acosf.c: Likewise.
	* sysdeps/ia64/fpu/w_acosh.c: Likewise.
	* sysdeps/ia64/fpu/w_acoshf.c: Likewise.
	* sysdeps/ia64/fpu/w_acoshl.c: Likewise.
	* sysdeps/ia64/fpu/w_acosl.c: Likewise.
	* sysdeps/ia64/fpu/w_asin.c: Likewise.
	* sysdeps/ia64/fpu/w_asinf.c: Likewise.
	* sysdeps/ia64/fpu/w_asinl.c: Likewise.
	* sysdeps/ia64/fpu/w_atan2.c: Likewise.
	* sysdeps/ia64/fpu/w_atan2f.c: Likewise.
	* sysdeps/ia64/fpu/w_atan2l.c: Likewise.
	* sysdeps/ia64/fpu/w_atanh.c: Likewise.
	* sysdeps/ia64/fpu/w_atanhf.c: Likewise.
	* sysdeps/ia64/fpu/w_atanhl.c: Likewise.
	* sysdeps/ia64/fpu/w_cosh.c: Likewise.
	* sysdeps/ia64/fpu/w_coshf.c: Likewise.
	* sysdeps/ia64/fpu/w_coshl.c: Likewise.
	* sysdeps/ia64/fpu/w_exp.c: Likewise.
	* sysdeps/ia64/fpu/w_exp10.c: Likewise.
	* sysdeps/ia64/fpu/w_exp10f.c: Likewise.
	* sysdeps/ia64/fpu/w_exp10l.c: Likewise.
	* sysdeps/ia64/fpu/w_exp2.c: Likewise.
	* sysdeps/ia64/fpu/w_exp2f.c: Likewise.
	* sysdeps/ia64/fpu/w_exp2l.c: Likewise.
	* sysdeps/ia64/fpu/w_expf.c: Likewise.
	* sysdeps/ia64/fpu/w_expl.c: Likewise.
	* sysdeps/ia64/fpu/w_fmod.c: Likewise.
	* sysdeps/ia64/fpu/w_fmodf.c: Likewise.
	* sysdeps/ia64/fpu/w_fmodl.c: Likewise.
	* sysdeps/ia64/fpu/w_hypot.c: Likewise.
	* sysdeps/ia64/fpu/w_hypotf.c: Likewise.
	* sysdeps/ia64/fpu/w_hypotl.c: Likewise.
	* sysdeps/ia64/fpu/w_lgamma_r.c: Likewise.
	* sysdeps/ia64/fpu/w_lgammaf_r.c: Likewise.
	* sysdeps/ia64/fpu/w_lgammal_r.c: Likewise.
	* sysdeps/ia64/fpu/w_log.c: Likewise.
	* sysdeps/ia64/fpu/w_log10.c: Likewise.
	* sysdeps/ia64/fpu/w_log10f.c: Likewise.
	* sysdeps/ia64/fpu/w_log10l.c: Likewise.
	* sysdeps/ia64/fpu/w_log2.c: Likewise.
	* sysdeps/ia64/fpu/w_log2f.c: Likewise.
	* sysdeps/ia64/fpu/w_log2l.c: Likewise.
	* sysdeps/ia64/fpu/w_logf.c: Likewise.
	* sysdeps/ia64/fpu/w_logl.c: Likewise.
	* sysdeps/ia64/fpu/w_pow.c: Likewise.
	* sysdeps/ia64/fpu/w_powf.c: Likewise.
	* sysdeps/ia64/fpu/w_powl.c: Likewise.
	* sysdeps/ia64/fpu/w_remainder.c: Likewise.
	* sysdeps/ia64/fpu/w_remainderf.c: Likewise.
	* sysdeps/ia64/fpu/w_remainderl.c: Likewise.
	* sysdeps/ia64/fpu/w_sinh.c: Likewise.
	* sysdeps/ia64/fpu/w_sinhf.c: Likewise.
	* sysdeps/ia64/fpu/w_sinhl.c: Likewise.
	* sysdeps/ia64/fpu/w_sqrt.c: Likewise.
	* sysdeps/ia64/fpu/w_sqrtf.c: Likewise.
	* sysdeps/ia64/fpu/w_sqrtl.c: Likewise.
	* sysdeps/ia64/fpu/w_tgamma.c: Likewise.
	* sysdeps/ia64/fpu/w_tgammaf.c: Likewise.
	* sysdeps/ia64/fpu/w_tgammal.c: Likewise.
	* sysdeps/ieee754/dbl-64/w_exp_compat.c: Condition contents on
	[LIBM_SVID_COMPAT].
	* sysdeps/ieee754/flt-32/w_expf_compat.c: Likewise.
	* sysdeps/ieee754/k_standard.c: Likewise.
	* sysdeps/ieee754/k_standardf.c: Likewise.
	* sysdeps/ieee754/k_standardl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/w_expl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/w_expl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-96/w_expl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-64-128/w_expl_compat.c: Condition
	long_double_symbol call on [LIBM_SVID_COMPAT].
	* sysdeps/ieee754/ldbl-opt/w_acoshl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_acosl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_asinl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_atan2l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_atanhl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_coshl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_fmodl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_hypotl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_j0l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_j1l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_jnl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_lgammal_r_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_log10l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_log2l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_logl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_powl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_remainderl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_sinhl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_sqrtl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_tgammal_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_exp10l_compat.c: Condition
	long_double_symbol and compat_symbol calls on [LIBM_SVID_COMPAT].
 2017-09-05 23:35:55 +00:00
Steve Ellcey
05b38d64b1 Fix tests that are testing obsoleted functionality 
* include/shlib-compat.h (TEST_COMPAT): New Macro.
	* malloc/tst-mallocstate.c: Convert from test-skeleton
	to test-driver.  Ifdef code using TEST_COMPAT macro.
	* math/test-matherr-2.c: Ifdef test using TEST_COMPAT macro.
	* math/test-matherr.c: Likewise.
 2017-09-05 12:24:00 -07:00
Joseph Myers
f3a129b872 Fix bits/math-finite.h exp10 condition (bug 22082). 
bits/math-finite.h handles exp10 if __USE_GNU.  It should use the
condition __GLIBC_USE (IEC_60559_FUNCS_EXT), as in bits/mathcalls.h.
This patch fixes the condition.

Tested for x86_64.

	[BZ #22082]
	* math/bits/math-finite.h (exp10): Redirect if [__GLIBC_USE
	(IEC_60559_FUNCS_EXT)], not [__USE_GNU].
 2017-09-04 16:28:23 +00:00
Florian Weimer
b38042f514 math.h: Warn about an already-defined log macro 
This is a common programming error, and the cause of the problem is not
always obvious.

<tgmath.h> defines a log macro, but it includes <math.h> before that, so
that is compatible with the warning.
 2017-09-04 17:56:31 +02:00
Joseph Myers
5a80d39d0d Obsolete pow10 functions. 
This patch obsoletes the pow10, pow10f and pow10l functions (makes
them into compat symbols, not available for new ports or static
linking).  The exp10 names for these functions are standardized (in TS
18661-4) and were added in the same glibc version (2.1) as pow10 so
source code can change to use them without any loss of portability.
Since pow10 is deliberately not provided for _Float128, only exp10,
this slightly simplifies moving to the new wrapper templates in the
!LIBM_SVID_COMPAT case, by avoiding needing to arrange for pow10,
pow10f and pow10l to be defined by those templates.

Tested for x86_64, and with build-many-glibcs.py.

	* manual/math.texi (pow10): Do not document.
	(pow10f): Likewise.
	(pow10l): Likewise.
	* math/bits/mathcalls.h [__USE_GNU] (pow10): Do not declare.
	* math/bits/math-finite.h [__USE_GNU] (pow10): Likewise.
	* math/libm-test-exp10.inc (pow10_test): Remove.
	(do_test): Do not call pow10.
	* math/w_exp10_compat.c (pow10): Make into compat symbol.
	[NO_LONG_DOUBLE] (pow10l): Likewise.
	* math/w_exp10f_compat.c (pow10f): Likewise.
	* math/w_exp10l_compat.c (pow10l): Likewise.
	* sysdeps/ia64/fpu/e_exp10.S: Include <shlib-compat.h>.
	(pow10): Make into compat symbol.
	* sysdeps/ia64/fpu/e_exp10f.S: Include <shlib-compat.h>.
	(pow10f): Make into compat symbol.
	* sysdeps/ia64/fpu/e_exp10l.S: Include <shlib-compat.h>.
	(pow10l): Make into compat symbol.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Remove
	pow10.
	(CFLAGS-nldbl-pow10.c): Remove variable..
	* sysdeps/ieee754/ldbl-opt/nldbl-pow10.c: Remove file.
	* sysdeps/ieee754/ldbl-opt/w_exp10_compat.c (pow10l): Condition on
	[SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)].
	* sysdeps/ieee754/ldbl-opt/w_exp10l_compat.c (compat_symbol):
	Undefine and redefine.
	(pow10l): Make into compat symbol.
	* sysdeps/aarch64/libm-test-ulps: Remove pow10 ulps.
	* sysdeps/alpha/fpu/libm-test-ulps: Likewise.
	* sysdeps/arm/libm-test-ulps: Likewise.
	* sysdeps/hppa/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/microblaze/libm-test-ulps: Likewise.
	* sysdeps/mips/mips32/libm-test-ulps: Likewise.
	* sysdeps/mips/mips64/libm-test-ulps: Likewise.
	* sysdeps/nios2/libm-test-ulps: Likewise.
	* sysdeps/powerpc/fpu/libm-test-ulps: Likewise.
	* sysdeps/powerpc/nofpu/libm-test-ulps: Likewise.
	* sysdeps/s390/fpu/libm-test-ulps: Likewise.
	* sysdeps/sh/libm-test-ulps: Likewise.
	* sysdeps/sparc/fpu/libm-test-ulps: Likewise.
	* sysdeps/tile/libm-test-ulps: Likewise.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2017-09-01 21:13:18 +00:00
Zack Weinberg
a617bd119f math/math.h (HUGE_VAL): Improve commentary. 2017-09-01 11:19:47 -04:00
Joseph Myers
c0c49d60cf Simplify NAN definitions. 
Similar to my patches for HUGE_VAL and INFINITY. this patch eliminates
the bits/nan.h headers.  __builtin_nanf ("") is used to define NAN for
GCC 3.3 and later; the fallback is (0.0f / 0.0f), which is a constant
expression for a quiet NaN of type float, but raises a spurious
"invalid" exception outside static initializers, which seems the best
that can be done purely in standard C.  Again, if anyone actually uses
a compiler with its own incompatible extension for producing a
constant quiet NaN, we can add compiler conditionals.

Tested for x86_64.

	*  math/math.h [__USE_ISOC99] (NAN): Define directly here.  Do not
	include <bits/nan.h>.
	* math/Makefile (headers): Remove bits/nan.h.
	* bits/nan.h: Remove.
	* sysdeps/ieee754/bits/nan.h: Likewise.
	* sysdeps/mips/bits/nan.h: Likewise.
 2017-08-31 16:39:25 +00:00