Commit Graph

3 Commits

Author SHA1 Message Date
Tomasz Sowa c73af9c116 - changed info in headers in source files: (new) BSD licence -> 3-Clause BSD Licence
- added svn:ignore in some places

git-svn-id: svn:// e52654a7-88a9-db11-a3e9-0013d4bc506e
2017-03-12 14:51:21 +00:00
Tomasz Sowa bb2583649e added: to Big<> class: support for NaN flag (Not a Number)
bool Big::IsNan() - returns true if the NaN flag is set
       void Big::SetNan() - sets the NaN flag
       The NaN flag is set by default after creating an object:
         Big<1, 2> a;    // NaN is set (it means the object has not a valid number)
         std::cout << a; // cout gives "NaN"
         a = 123;        // now NaN is not set
         std::cout << a; // cout gives "123"
       The NaN is set if there was a carry during calculations
         a.Mul(very_big_value); // a will have a NaN set
	   The NaN is set if an argument is NaN too
	     a.Add(b);  // a will have NaN because b has NaN too
       If you try to do something on a NaN object, the result is a NaN too
         a.Add(2);  // a is still a NaN 
       The NaN is set if you use incorrect arguments
         a.Ln(-10); // a will have the NaN flag
       The only way to clear the NaN flag is to assign a correct value or other correct object
         supposing 'a' has NaN flag, to remove the flag you can either:
         a = 10;

git-svn-id: svn:// e52654a7-88a9-db11-a3e9-0013d4bc506e
2009-05-26 23:13:22 +00:00
Tomasz Sowa 460608859c added: 'constgen' directory -- there is a program there to generate some constants used in ttmathbig.h
changed: the size of built-in variables (constants) in ttmathbig.h
         now they consist of 256 32bit words
         macro TTMATH_BUILTIN_VARIABLES_SIZE is equal: 256u on a 32bit platform and 128ul on a 64bit platform
added:   macro CONSTANTSGENERATOR which is useful for generating constants
         (it's used by 'gen' program in 'constgen' directory)
         after declaring this macro the methods: ExpSurrounding0() and LnSurrounding1() will be public visible
         and the inner loop can do more iterations than TTMATH_ARITHMETIC_MAX_LOOP
changed: in methods: ExpSurrounding0() and LnSurrounding1() - the way of comparising with the last word
         (now we're comparing not with the last state but with a state from a few words back)

git-svn-id: svn:// e52654a7-88a9-db11-a3e9-0013d4bc506e
2009-03-12 20:54:46 +00:00