X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=rts%2Fgmp%2FREADME;fp=rts%2Fgmp%2FREADME;h=177c97eb1237be1f5aea8d08b3e8b9b885e6d7d8;hb=0065d5ab628975892cea1ec7303f968c3338cbe1;hp=0000000000000000000000000000000000000000;hpb=28a464a75e14cece5db40f2765a29348273ff2d2;p=ghc-hetmet.git diff --git a/rts/gmp/README b/rts/gmp/README new file mode 100644 index 0000000..177c97e --- /dev/null +++ b/rts/gmp/README @@ -0,0 +1,84 @@ + + 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 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://www.swox.com/gmp/, +under "Status of the current release". There will be patches for all known +serious bugs there. + +Report bugs to bug-gmp@gnu.org. What information is needed in a good bug +report is described in the manual. The same address can be used for +suggesting modifications and enhancements. + + + + +---------------- +Local variables: +mode: text +fill-column: 78 +End: