test390 is a collection of assembler programs designed to exercise
various instructions in the S/390 mainframe architecture.

The following programs and macros by Don Higgins are taken from the
z390 package version 1506 at http://www.z390.org and are distributed
under the GNU General Public License:

    TESTINS1.MLC         TESTDFP1.MLC           LX.MAC
    TESTINS2.MLC         TESTDFP2.MLC           STX.MAC
    TESTINS3.MLC         TESTFP1.MLC            RT1.MAC
    TESTINS4.MLC         TESTFP2.MLC            SUBENTRY.MAC
    TESTCVB1.MLC         TESTCVBG.MLC           SUBEXIT.MAC