WIP: convert DefReg7

Change-Id: I3d4b22da2987a5f005e82b2076c21558c3c39c60
WIP: rm redundant defReg8 tests

Change-Id: I5bcfdbc5d615212d3dc2f198663aa0a3c728dc28
WIP: init converting of ex8

Change-Id: I7545e5e4222beef20e087b1bdd38f7de5bb8d417
WIP: fix test commands for ex8

Change-Id: I8986cab20291139b0f85b1b1d4267001e5adbec0
WIP: ex8 test is passed

Change-Id: I29a9adb2614d2681fe556556327ec1f11eb48535
WIP: minor edit in ex4

Change-Id: Ibaa835b61cc93369f230d131e1c8a4f05f104ed2
WIP: finalize the ex6

Change-Id: I68fbd2061f36ca89cc2aed6e3b6a3fbedced08fa
WIP: finalize ex7

Change-Id: I21220f4dc571714aeaa8cebcd92e8b0b577e0c97
WIP: finalize ex8

Change-Id: I9e450891dc8e5a20c11a4893b2edd2f9979750f5