dec64_math.c contains elementary functions for DEC64 numbers. dec64_math.h includes C function prototypes for these functions:

dec64 dec64_acos(dec64 slope) dec64 dec64_asin(dec64 slope) dec64 dec64_atan(dec64 slope) dec64 dec64_atan2(dec64 y, dec64 x) dec64 dec64_cos(dec64 radians) dec64 dec64_exp(dec64 exponent) dec64 dec64_factorial(dec64 x) dec64 dec64_log(dec64 x) dec64 dec64_raise(dec64 coefficient, dec64 exponent) dec64 dec64_random() dec64 dec64_root(dec64 degree, dec64 radicand) void dec64_seed(uint64 part_0, uint64 part_1) dec64 dec64_sin(dec64 radians) dec64 dec64_sqrt(dec64 radicand) dec64 dec64_tan(dec64 radians)

This is a placeholder that should be replaced with faster, more accurate functions.