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float128: Add private _Float128 declarations for libm.

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Add the necessary bits to the private headers to support
building the _Float128 libm functions.

A local override for float.h is provided to include the
missing *FLT128 macros implied by TS 18661-3 for this
type when compiling prior to GCC 7.

	* include/complex.h (__kernel_casinhf128): New declaration.
	* include/float.h: New file.
	* include/math.h (__finitef128): Add a hidden def.
	(__isinff128): Likewise.
	(__isnanf128): Likewise.
	(__fpclassify): Likewise.
	(__issignalling): Likewise.
	(__expf128): Likewise.
	(__expm1f128): Likewise.

	* sysdeps/generic/fix-fp-int-convert-overflow.h:
	(FIX_FLT128_LONG_CONVERT_OVERFLOW): New macro.
	(FIX_FLT128_LLONG_CONVERT_OVERFLOW): Likewise.

	* sysdeps/generic/math-type-macros-float128.h: New file.

	* sysdeps/generic/math_private.h: Include bits/floatn.h and
	math_private_calls.h for _Float128.
	(__isinff128): New inline implementation used when GCC < 7.0,
	since in this case __builtin_isinf_sign is broken.
	(fabsf128): New inline implementation that calls the builtin.
	(__EXPR_FLT128): New macro.
	(min_of_type): Optionally include _Float128 types too.

	* sysdeps/generic/math_private_calls.h (__kernel_sincos):
	Declare for _Float128.
	(__kernel_rem_pio2): Likewise.

	* sysdeps/ieee754/ldbl-opt/s_sin.c:
	(__DECL_SIMD_sincos_disablef128): New macro.
This commit is contained in:
Paul E. Murphy 2017-05-04 17:00:33 -03:00 committed by Gabriel F. T. Gomes
parent 33d523d7f8
commit 81f26b53b5
9 changed files with 175 additions and 3 deletions
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34
ChangeLog
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@ -1,3 +1,37 @@
2017-05-14 Paul E. Murphy <murphyp@linux.vnet.ibm.com>
Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com>
* include/complex.h (__kernel_casinhf128): New declaration.
* include/float.h: New file.
* include/math.h (__finitef128): Add a hidden def.
(__isinff128): Likewise.
(__isnanf128): Likewise.
(__fpclassify): Likewise.
(__issignalling): Likewise.
(__expf128): Likewise.
(__expm1f128): Likewise.
* sysdeps/generic/fix-fp-int-convert-overflow.h:
(FIX_FLT128_LONG_CONVERT_OVERFLOW): New macro.
(FIX_FLT128_LLONG_CONVERT_OVERFLOW): Likewise.
* sysdeps/generic/math-type-macros-float128.h: New file.
* sysdeps/generic/math_private.h: Include bits/floatn.h and
math_private_calls.h for _Float128.
(__isinff128): New inline implementation used when GCC < 7.0,
since in this case __builtin_isinf_sign is broken.
(fabsf128): New inline implementation that calls the builtin.
(__EXPR_FLT128): New macro.
(min_of_type): Optionally include _Float128 types too.
* sysdeps/generic/math_private_calls.h (__kernel_sincos):
Declare for _Float128.
(__kernel_rem_pio2): Likewise.
* sysdeps/ieee754/ldbl-opt/s_sin.c:
(__DECL_SIMD_sincos_disablef128): New macro.
2017-05-14 Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com>
* math/math.h: Include bits/math-finite.h for float128.

3
include/complex.h
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@ -8,6 +8,9 @@
extern complex float __kernel_casinhf (complex float z, int adj);
extern complex double __kernel_casinh (complex double z, int adj);
extern complex long double __kernel_casinhl (complex long double z, int adj);
# if __HAVE_DISTINCT_FLOAT128
extern __CFLOAT128 __kernel_casinhf128 (__CFLOAT128 z, int adj);
# endif
# endif
#endif

31
include/float.h Normal file
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@ -0,0 +1,31 @@
#ifndef _LIBC_FLOAT_H
#define _LIBC_FLOAT_H
#ifndef _ISOMAC
# define __STDC_WANT_IEC_60559_TYPES_EXT__
#endif
#include_next <float.h>
/* Supplement float.h macros for _Float128 for older compilers
which do not yet support the type. These are described in
TS 18661-3. */
#ifndef _ISOMAC
# include <features.h>
# include <bits/floatn.h>
# if !__GNUC_PREREQ (7, 0) && __HAVE_DISTINCT_FLOAT128
# define FLT128_MANT_DIG 113
# define FLT128_DECIMAL_DIG 36
# define FLT128_DIG 33
# define FLT128_MIN_EXP (-16381)
# define FLT128_MIN_10_EXP (-4931)
# define FLT128_MAX_EXP 16384
# define FLT128_MAX_10_EXP 4932
# define FLT128_MAX 1.18973149535723176508575932662800702e+4932Q
# define FLT128_EPSILON 1.92592994438723585305597794258492732e-34Q
# define FLT128_MIN 3.36210314311209350626267781732175260e-4932Q
# define FLT128_TRUE_MIN 6.47517511943802511092443895822764655e-4966Q
# endif
#endif
#endif /* _LIBC_FLOAT_H */

13
include/math.h
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@ -26,6 +26,12 @@ hidden_proto (__finitel)
hidden_proto (__isinfl)
hidden_proto (__isnanl)
# endif
# if __HAVE_DISTINCT_FLOAT128
hidden_proto (__finitef128)
hidden_proto (__isinff128)
hidden_proto (__isnanf128)
# endif
# endif
libm_hidden_proto (__fpclassify)
@ -43,5 +49,12 @@ libm_hidden_proto (__expl)
libm_hidden_proto (__expm1l)
# endif
# if __HAVE_DISTINCT_FLOAT128
libm_hidden_proto (__fpclassifyf128)
libm_hidden_proto (__issignalingf128)
libm_hidden_proto (__expf128)
libm_hidden_proto (__expm1f128)
# endif
#endif
#endif

2
sysdeps/generic/fix-fp-int-convert-overflow.h
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@ -29,5 +29,7 @@
#define FIX_DBL_LLONG_CONVERT_OVERFLOW 0
#define FIX_LDBL_LONG_CONVERT_OVERFLOW 0
#define FIX_LDBL_LLONG_CONVERT_OVERFLOW 0
#define FIX_FLT128_LONG_CONVERT_OVERFLOW 0
#define FIX_FLT128_LLONG_CONVERT_OVERFLOW 0
#endif /* fix-fp-int-convert-overflow.h */

39
sysdeps/generic/math-type-macros-float128.h Normal file
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@ -0,0 +1,39 @@
/* Helper macros for _Float128 variants of type generic functions of libm.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _MATH_TYPE_MACROS_FLOAT128
#define _MATH_TYPE_MACROS_FLOAT128
#include <math.h>
#include <complex.h>
#define M_LIT(c) __f128 (c)
#define M_PFX FLT128
#define M_SUF(c) c ## f128
#define FLOAT _Float128
#define M_STRTO_NAN __strtof128_nan
#define CFLOAT __CFLOAT128
#define M_MLIT(c) c ## f128
/* Supply the generic macros. */
#include <math-type-macros.h>
#endif

51
sysdeps/generic/math_private.h
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@ -23,6 +23,9 @@
#include <float.h>
#include <get-rounding-mode.h>
/* Gather machine dependent _Floatn support. */
#include <bits/floatn.h>
/* The original fdlibm code used statements like:
n0 = ((*(int*)&one)>>29)^1; * index of high word *
ix0 = *(n0+(int*)&x); * high word of x *
@ -211,6 +214,41 @@ do { \
#undef _MSUF_
#undef _Mdouble_
#if __HAVE_DISTINCT_FLOAT128
# define _Mdouble_ _Float128
# define _MSUF_ f128
# define __MATH_DECLARING_FLOATN
# include <math_private_calls.h>
# undef __MATH_DECLARING_FLOATN
# undef _MSUF_
# undef _Mdouble_
#endif
#if __HAVE_DISTINCT_FLOAT128
/* __builtin_isinf_sign is broken in GCC < 7 for float128. */
# if ! __GNUC_PREREQ (7, 0)
# include <ieee754_float128.h>
extern inline int
__isinff128 (_Float128 x)
{
int64_t hx, lx;
GET_FLOAT128_WORDS64 (hx, lx, x);
lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL;
lx |= -lx;
return ~(lx >> 63) & (hx >> 62);
}
# endif
extern inline _Float128
fabsf128 (_Float128 x)
{
return __builtin_fabsf128 (x);
}
#endif
/* fdlibm kernel function */
extern double __kernel_standard (double,double,int);
extern float __kernel_standard_f (float,float,int);
@ -263,13 +301,24 @@ extern void __docos (double __x, double __dx, double __v[]);
})
#endif
#if __HAVE_DISTINCT_FLOAT128
# define __EXPR_FLT128(x, yes, no) \
__builtin_choose_expr (__builtin_types_compatible_p \
(__typeof (x), long double), no, yes)
#else
# define __EXPR_FLT128(x, yes, no) no
#endif
#define fabs_tg(x) __MATH_TG ((x), (__typeof (x)) __builtin_fabs, (x))
#define min_of_type(type) __builtin_choose_expr \
(__builtin_types_compatible_p (type, float), \
FLT_MIN, \
__builtin_choose_expr \
(__builtin_types_compatible_p (type, double), \
DBL_MIN, LDBL_MIN))
DBL_MIN, \
__EXPR_FLT128 (x, FLT128_MIN, LDBL_MIN)))
/* If X (which is not a NaN) is subnormal, force an underflow
exception. */

4
sysdeps/generic/math_private_calls.h
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@ -64,12 +64,12 @@ extern _Mdouble_ __MSUF (__kernel_sin) (_Mdouble_, _Mdouble_, int);
extern _Mdouble_ __MSUF (__kernel_cos) (_Mdouble_, _Mdouble_);
extern _Mdouble_ __MSUF (__kernel_tan) (_Mdouble_, _Mdouble_, int);
#if defined __MATH_DECLARING_LONG_DOUBLE
#if defined __MATH_DECLARING_LONG_DOUBLE || defined __MATH_DECLARING_FLOATN
extern void __MSUF (__kernel_sincos) (_Mdouble_, _Mdouble_,
_Mdouble_ *, _Mdouble_ *, int);
#endif
#if !defined __MATH_DECLARING_LONG_DOUBLE
#if !defined __MATH_DECLARING_LONG_DOUBLE || defined __MATH_DECLARING_FLOATN
extern int __MSUF (__kernel_rem_pio2) (_Mdouble_ *, _Mdouble_ *, int,
int, int, const int32_t *);
#endif

1
sysdeps/ieee754/ldbl-opt/s_sin.c
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@ -4,6 +4,7 @@
#define __DECL_SIMD_sincos_disable
#define __DECL_SIMD_sincos_disablef
#define __DECL_SIMD_sincos_disablel
#define __DECL_SIMD_sincos_disablef128
#include <math_ldbl_opt.h>
#undef NAN
#undef sincos