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- THE GNU MP LIBRARY
-
-
-GNU MP is a library for arbitrary precision arithmetic, operating on
-signed integers and rational numbers. It has a rich set of functions,
-and the functions have a regular interface.
-
-I have tried to make these functions as fast as possible, both for small
-operands and for huge operands. The speed is achieved by using fullwords
-as the basic arithmetic type, by using fast algorithms, by defining inline
-assembler for mixed sized multiplication and division (i.e 32*32->64 bit
-multiplication and 64/32->32,32 bit division), and by hacking the code
-with emphasis on speed (and not simplicity and elegance).
-
-The speed of GNU MP is about 5 to 100 times that of Berkeley MP for
-small operands. The speed-up increases with the operand sizes for
-certain operations, for which GNU MP has asymptotically faster algorithms.
-
-
-There are four classes of functions in GNU MP.
-
- 1. Signed integer arithmetic functions, mpz_*. The set of functions are
- intended to be easy to use, being rich and regular.
-
- To use these functions, include the file "gmp.h".
-
- 2. Rational arithmetic functions, mpq_*. For now, just a small set of
- functions necessary for basic rational arithmetics.
-
- To use these functions, include the file "gmp.h".
-
- 3. Positive-integer, low-level, harder-to-use, but for small operands
- about twice as fast than the mpz_* functions are the functions 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 quite 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 a integral size telling how
- many limbs (= words) the pointer points to.
-
- Almost all calculations, in the entire package, are made in these
- low-level functions.
-
- These functions are not fully documented in this release. They will
- probably be so in a future release.
-
- 4. 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.
-
-
- REPORTING BUGS
-
-If you find a bug in the library, please make sure to tell us about it!
-
-You can report bugs, and propose modifications and enhancements to
-tege@gnu.ai.mit.edu. How to report a bug is further described in
-the texinfo documentation, see the file gmp.texi.
-
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