AArch64 support, many more functions, etc.

• Added AArch64 support
• Implemented the remaining C99 math functions : lgamma, tgamma, erf, erfc, fabs, copysign, fmax, fmin, fdim, trunc, floor, ceil, round, rint, modf, ldexp, nextafter, frexp, hypot, and fmod.
• Added dispatcher for x86 functions
• Improved reduction of trigonometric functions
• Added support for 32-bit x86, Cygwin, etc.
• Improved tester
• Updated documentation
• Etc.

[](https://sourceforge.net/projects/sleef/files/3.1/AArch64 support, many more functions, etc..zip/download)