acos.s fix: use the formula acos(x) = atan2(sqrt(1-x),sqrt(1+x))
-rw-r--r-- 87 .gitignore
-rw-r--r-- 26428 COPYING
-rw-r--r-- 2502 COPYRIGHT
-rw-r--r-- 5415 INSTALL
-rw-r--r-- 2924 Makefile
-rw-r--r-- 2180 README
-rw-r--r-- 14796 WHATSNEW
drwxr-xr-x - arch
drwxr-xr-x - crt
drwxr-xr-x - dist
drwxr-xr-x - include
drwxr-xr-x - lib
drwxr-xr-x - src
drwxr-xr-x - tools