Subtraction of two 64-bit integer or fractional values, returning a 64-bit result.
Word64 __LL_sub(Word64 src_dst, Word64 src2)
long long s1 = 0x2345678900000000; long long s2 = 0xDCBA987700000000; long long result; result = L_sub (s1, s2); // Expected value of result: 0x2345678900000000 - 0xDCBA987700000000 = 0x468ACF1200000000