65 lines
2.5 KiB
Plaintext
65 lines
2.5 KiB
Plaintext
The "libnum" library implements exact-precision rational arithmetic.
|
|
It is built upon the state-of-the-art BigNum arbitrary-precision
|
|
integer arithmetic package, and therefore achieves very high
|
|
performance (it's faster than Maple, for instance).
|
|
|
|
This library is derived from Valerie Menissie-Morain's implementation
|
|
of rational arithmetic for Caml V3.1 (INRIA), and builds on the BigNum
|
|
package developed by Bernard Serpette, Jean Vuillemin and Jean-Claude
|
|
Herve (INRIA and Digital PRL). Xavier Leroy (INRIA) did the Caml Light
|
|
port. Victor Manuel Gulias Fernandez did the Caml Special Light port.
|
|
|
|
This library is documented in "The CAML Numbers Reference Manual" by
|
|
Valerie Menissier-Morain, technical report 141, INRIA, july 1992,
|
|
available by anonymous FTP from ftp.inria.fr, directory
|
|
INRIA/publications/RT, file RT-0141.ps.Z.
|
|
|
|
USAGE:
|
|
|
|
To use the bignum library from your programs, just do
|
|
|
|
cslc -custom <other options> nums.cma <other .cmo and .ml files> -lnums
|
|
|
|
for the linking phase.
|
|
|
|
If you'd like to have the bignum functions available at toplevel, do
|
|
|
|
cslmktop -o csltopnum -custom <other options> nums.cma <other .cmo and .ml files> -lnums
|
|
./csltopnum
|
|
|
|
As an example, try:
|
|
|
|
open Num;;
|
|
let rec fact n =
|
|
if n = 0 then Int 1 else mult_num (num_of_int n) (fact(n-1));;
|
|
string_of_num(fact 1000);;
|
|
|
|
KNOWN TARGET ARCHITECTURES:
|
|
|
|
C portable C version (default)
|
|
sparc Sparc V8 assembly code, SunOS 4.1
|
|
sparc-solaris Sparc V8 assembly code, Solaris 2
|
|
supersparc Sparc V9 assembly code, SunOS 4.1
|
|
supersparc-solaris Sparc V9 assembly code, Solaris 2
|
|
mips MIPS R2000, R3000, R4000 assembly code
|
|
alpha DEC Alpha (21064) assembly code
|
|
68K Motorola 68020 assembly code
|
|
vax DEC VAX assembly code
|
|
i960 Intel 80960A assembly code
|
|
ns National Semiconductors 32032 assembly code
|
|
pyramid Pyramid minicomputers assembly code
|
|
|
|
LEGAL NOTICE:
|
|
|
|
This work uses the BigNum package developed jointly by INRIA and Digital PRL.
|
|
|
|
The code in the bignum/ subdirectory is copyright INRIA and Digital,
|
|
and may be reproduced and distributed freely to non commercial usage
|
|
according to the conditions stated in the documentation of this package
|
|
(directory bignum/doc).
|
|
|
|
KNOWN PROBLEMS:
|
|
|
|
64-bit architectures are not yet fully supported. The test suite passes on
|
|
a Dec Alpha, but some bugs remain.
|