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-Copyright 1991, 1996, 1999, 2000, 2007 Free Software Foundation, Inc. |
- |
-This file is part of the GNU MP Library. |
- |
-The GNU MP 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 MP 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 MP Library. If not, see http://www.gnu.org/licenses/. |
- |
- |
- |
- |
- |
- |
- THE GNU MP LIBRARY |
- |
- |
-GNU MP is a library for arbitrary precision arithmetic, operating on signed |
-integers, rational numbers, and floating point numbers. It has a rich set of |
-functions, and the functions have a regular interface. |
- |
-GNU MP is designed to be as fast as possible, both for small operands and huge |
-operands. The speed is achieved by using fullwords as the basic arithmetic |
-type, by using fast algorithms, with carefully optimized assembly code for the |
-most common inner loops for lots of CPUs, and by a general emphasis on speed |
-(instead of simplicity or elegance). |
- |
-GNU MP is believed to be faster than any other similar library. Its advantage |
-increases with operand sizes for certain operations, since GNU MP in many |
-cases has asymptotically faster algorithms. |
- |
-GNU MP is free software and may be freely copied on the terms contained in the |
-files COPYING.LIB and COPYING (most of GNU MP is under the former, some under |
-the latter). |
- |
- |
- |
- OVERVIEW OF GNU MP |
- |
-There are five classes of functions in GNU MP. |
- |
- 1. Signed integer arithmetic functions (mpz). These functions are intended |
- to be easy to use, with their regular interface. The associated type is |
- `mpz_t'. |
- |
- 2. Rational arithmetic functions (mpq). For now, just a small set of |
- functions necessary for basic rational arithmetics. The associated type |
- is `mpq_t'. |
- |
- 3. Floating-point arithmetic functions (mpf). If the C type `double' |
- doesn't give enough precision for your application, declare your |
- variables as `mpf_t' instead, set the precision to any number desired, |
- and call the functions in the mpf class for the arithmetic operations. |
- |
- 4. Positive-integer, hard-to-use, very low overhead functions are in the |
- mpn class. No memory management is performed. The caller must ensure |
- enough space is available for the results. The set of functions is not |
- regular, nor is the calling interface. These functions accept input |
- arguments in the form of pairs consisting of a pointer to the least |
- significant word, and an integral size telling how many limbs (= words) |
- the pointer points to. |
- |
- Almost all calculations, in the entire package, are made by calling these |
- low-level functions. |
- |
- 5. Berkeley MP compatible functions. |
- |
- To use these functions, include the file "mp.h". You can test if you are |
- using the GNU version by testing if the symbol __GNU_MP__ is defined. |
- |
-For more information on how to use GNU MP, please refer to the documentation. |
-It is composed from the file doc/gmp.texi, and can be displayed on the screen |
-or printed. How to do that, as well how to build the library, is described in |
-the INSTALL file in this directory. |
- |
- |
- |
- REPORTING BUGS |
- |
-If you find a bug in the library, please make sure to tell us about it! |
- |
-You should first check the GNU MP web pages at http://gmplib.org/, under |
-"Status of the current release". There will be patches for all known serious |
-bugs there. |
- |
-Report bugs to gmp-bugs@gmplib.org. What information is needed in a useful bug |
-report is described in the manual. The same address can be used for suggesting |
-modifications and enhancements. |
- |
- |
- |
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