1 The files in this directory support an increase in the precision 2 of the functions in the 'xarm' library segment. This is accomplished 3 by increasing the size of the mantissa. Possible enhanced mantissa 4 sizes are 11, 15, 19, 23, 27, and 31 sixteen bit words. First 5 redefine XDIM in 'xpre.h' to be equal to one of these values, 6 then replace the 'constant.h' header with the corresponding 7 'const[nn].h' from this directory, and recompile the segment code 8 with these new header files. 9