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float128: Add conversion from float128 to mpn

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Reuse the code for __mpn_extract_long_double to implement
__mpn_extract_float128.

	* include/gmp.h: Include bits/floatn.h
	(__mpn_extract_float128): Declare when __HAVE_DISTINCT_FLOAT128 is 1.
	* stdlib/gmp-impl.h: Also check if alloca is not defined before
	including stack-alloc.h.  It could have been defined by other header
	which not necessarily defines HAVE_ALLOCA.
	* sysdeps/ieee754/float128/Makefile: New file.
	* sysdeps/ieee754/float128/float1282mpn.c: New file.
	* sysdeps/ieee754/float128/float128_private.h: Include gmp.h before
	redefining __mpn_extract_long_double to __mpn_extract_float128, then
	redefine __mpn_extract_long_double to __mpn_extract_float128.
	* sysdeps/ieee754/ldbl-128/ldbl2mpn.c: Replace long double with
	_Float128 to allow float128_private.h overrides.
This commit is contained in:
Gabriel F. T. Gomes 2016-11-03 12:26:52 -02:00
parent 82c19bdfe3
commit 32bf1d09da
7 changed files with 52 additions and 2 deletions
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15
ChangeLog
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@ -1,3 +1,18 @@
2017-06-07 Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com>
* include/gmp.h: Include bits/floatn.h
(__mpn_extract_float128): Declare when __HAVE_DISTINCT_FLOAT128 is 1.
* stdlib/gmp-impl.h: Also check if alloca is not defined before
including stack-alloc.h. It could have been defined by other header
which not necessarily defines HAVE_ALLOCA.
* sysdeps/ieee754/float128/Makefile: New file.
* sysdeps/ieee754/float128/float1282mpn.c: New file.
* sysdeps/ieee754/float128/float128_private.h: Include gmp.h before
redefining __mpn_extract_long_double to __mpn_extract_float128, then
redefine __mpn_extract_long_double to __mpn_extract_float128.
* sysdeps/ieee754/ldbl-128/ldbl2mpn.c: Replace long double with
_Float128 to allow float128_private.h overrides.
2017-06-07 Paul E. Murphy <murphyp@linux.vnet.ibm.com>
* stdlib/fpioconst.h: Include bits/floatn.h.

8
include/gmp.h
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@ -6,6 +6,8 @@
#include <stdlib/gmp.h>
#include <bits/floatn.h>
/* Now define the internal interfaces. */
extern mp_size_t __mpn_extract_double (mp_ptr res_ptr, mp_size_t size,
int *expt, int *is_neg,
@ -15,6 +17,12 @@ extern mp_size_t __mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size,
int *expt, int *is_neg,
long double value);
#if __HAVE_DISTINCT_FLOAT128
extern mp_size_t __mpn_extract_float128 (mp_ptr res_ptr, mp_size_t size,
int *expt, int *is_neg,
_Float128 value);
#endif
extern float __mpn_construct_float (mp_srcptr frac_ptr, int expt, int sign);
extern double __mpn_construct_double (mp_srcptr frac_ptr, int expt,

3
stdlib/gmp-impl.h
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@ -47,7 +47,8 @@ along with the GNU MP Library; see the file COPYING.LIB. If not, see
#endif
#endif
#if ! defined (HAVE_ALLOCA) || defined (USE_STACK_ALLOC)
#if (! defined (alloca) && ! defined (HAVE_ALLOCA)) \
|| defined (USE_STACK_ALLOC)
#include "stack-alloc.h"
#else
#define TMP_DECL(m)

3
sysdeps/ieee754/float128/Makefile Normal file
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@ -0,0 +1,3 @@
ifeq ($(subdir),stdlib)
routines += float1282mpn
endif

20
sysdeps/ieee754/float128/float1282mpn.c Normal file
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@ -0,0 +1,20 @@
/* Convert a _Float128 type to multiprecision.
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/>. */
#include <float128_private.h>
#include "../ldbl-128/ldbl2mpn.c"

2
sysdeps/ieee754/float128/float128_private.h
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@ -17,6 +17,7 @@
<http://www.gnu.org/licenses/>. */
/* This must be included before the function renames below. */
#include <gmp.h>
#include <math.h>
#undef HUGE_VALL
#define HUGE_VALL HUGE_VAL_F128
@ -291,6 +292,7 @@
#define __kernel_tanl __kernel_tanf128
#define __lgamma_negl __lgamma_negf128
#define __lgamma_productl __lgamma_productf128
#define __mpn_extract_long_double __mpn_extract_float128
#define __sincosl_table __sincosf128_table
#define mul_splitl mul_splitf128

3
sysdeps/ieee754/ldbl-128/ldbl2mpn.c
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@ -21,6 +21,7 @@
#include <ieee754.h>
#include <float.h>
#include <math.h>
#include <math_private.h>
#include <stdlib.h>
/* Convert a `long double' in IEEE854 quad-precision format to a
@ -31,7 +32,7 @@
mp_size_t
__mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size,
int *expt, int *is_neg,
long double value)
_Float128 value)
{
union ieee854_long_double u;
u.d = value;