diff options
author | vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4> | 2010-08-17 09:10:13 +0000 |
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committer | vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4> | 2010-08-17 09:10:13 +0000 |
commit | c9583bdfe064e1069828e518533f7bc29a8fdddb (patch) | |
tree | 2400842d4095628b8486fbeabaf7bc7b8af4ed02 /src/init2.c | |
parent | 50ac5b5985174201c7fa6e20496cd2b096107001 (diff) | |
download | mpfr-c9583bdfe064e1069828e518533f7bc29a8fdddb.tar.gz |
Source reorganization. In short:
* Added directories and moved related files into them:
- src for the MPFR source files (to build the library).
- doc for documentation files (except INSTALL, README...).
- tools for various tools (scripts) and mbench.
- tune for tuneup-related source files.
- other for other source files (not distributed in tarballs).
Existing directories:
- tests for the source files of the test suite (make check).
- examples for examples.
- m4 for m4 files.
* Renamed configure.in to configure.ac.
* Added/updated Makefile.am files where needed.
* Updated acinclude.m4 and configure.ac (AC_CONFIG_FILES line).
* Updated the documentation (INSTALL, README, doc/README.dev and
doc/mpfr.texi).
* Updated NEWS and TODO.
* Updated the scripts now in tools.
The following script was used:
#!/usr/bin/env zsh
svn mkdir doc other src tools tune
svn mv ${${(M)$(sed -n '/libmpfr_la_SOURCES/,/[^\]$/p' \
Makefile.am):#*.[ch]}:#get_patches.c} mparam_h.in \
round_raw_generic.c jyn_asympt.c src
svn mv mbench check_inits_clears coverage get_patches.sh mpfrlint \
nightly-test update-patchv update-version tools
svn mv bidimensional_sample.c speed.c tuneup.c tune
svn mv *.{c,h} other
svn mv FAQ.html README.dev algorithm* faq.xsl fdl.texi mpfr.texi \
update-faq doc
svn mv configure.in configure.ac
svn cp Makefile.am src/Makefile.am
svn rm replace_all
[Modifying some files, see above]
svn add doc/Makefile.am
svn add tune/Makefile.am
git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@7087 280ebfd0-de03-0410-8827-d642c229c3f4
Diffstat (limited to 'src/init2.c')
-rw-r--r-- | src/init2.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/init2.c b/src/init2.c new file mode 100644 index 000000000..c2b5ce3a8 --- /dev/null +++ b/src/init2.c @@ -0,0 +1,69 @@ +/* mpfr_init2 -- initialize a floating-point number with given precision + +Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. +Contributed by the Arenaire and Caramel projects, INRIA. + +This file is part of the GNU MPFR Library. + +The GNU MPFR 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 3 of the License, or (at your +option) any later version. + +The GNU MPFR 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 MPFR Library; see the file COPYING.LESSER. If not, see +http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., +51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#include "mpfr-impl.h" + +void +mpfr_init2 (mpfr_ptr x, mpfr_prec_t p) +{ + mp_size_t xsize; + mp_ptr tmp; + + /* Check if we can represent the number of limbs + * associated to the maximum of mpfr_prec_t*/ + MPFR_ASSERTN( MP_SIZE_T_MAX >= (MPFR_PREC_MAX/BYTES_PER_MP_LIMB) ); + + /* Check for correct GMP_NUMB_BITS and BYTES_PER_MP_LIMB */ + MPFR_ASSERTN( GMP_NUMB_BITS == BYTES_PER_MP_LIMB * CHAR_BIT + && sizeof(mp_limb_t) == BYTES_PER_MP_LIMB ); + + MPFR_ASSERTN (mp_bits_per_limb == GMP_NUMB_BITS); + + /* Check for correct EXP NAN, ZERO & INF in both mpfr.h and in mpfr-impl.h */ + MPFR_ASSERTN( __MPFR_EXP_NAN == MPFR_EXP_NAN ); + MPFR_ASSERTN( __MPFR_EXP_ZERO == MPFR_EXP_ZERO ); + MPFR_ASSERTN( __MPFR_EXP_INF == MPFR_EXP_INF ); + + MPFR_ASSERTN( MPFR_EMAX_MAX <= (MPFR_EXP_MAX >> 1) ); + MPFR_ASSERTN( MPFR_EMIN_MIN >= -(MPFR_EXP_MAX >> 1) ); + + /* p=1 is not allowed since the rounding to nearest even rule requires at + least two bits of mantissa: the neighbours of 3/2 are 1*2^0 and 1*2^1, + which both have an odd mantissa */ + MPFR_ASSERTN(p >= MPFR_PREC_MIN && p <= MPFR_PREC_MAX); + + xsize = (mp_size_t) ((p - 1) / GMP_NUMB_BITS) + 1; + tmp = (mp_ptr) (*__gmp_allocate_func)(MPFR_MALLOC_SIZE(xsize)); + + MPFR_PREC(x) = p; /* Set prec */ + MPFR_EXP (x) = MPFR_EXP_INVALID; /* make sure that the exp field has a + valid value in the C point of view */ + MPFR_SET_POS(x); /* Set a sign */ + MPFR_SET_MANT_PTR(x, tmp); /* Set Mantissa ptr */ + MPFR_SET_ALLOC_SIZE(x, xsize); /* Fix alloc size of Mantissa */ + MPFR_SET_NAN(x); /* initializes to NaN */ +} + +#ifdef MPFR_USE_OWN_MPFR_TMP_ALLOC +static unsigned char mpfr_stack_tab[8000000]; +unsigned char *mpfr_stack = mpfr_stack_tab; +#endif |