[Testing] Add a lot more missing instruction tests

src/xenia/cpu/ppc/testing/instr_lbz.s

@@ -0,0 +1,50 @@
+test_lbz_1:
+  #_ MEMORY_IN 0x0000000010001000 [AB, CD, EF, 12, 34, 56, 78, 9A]
+  #_ REGISTER_IN r4 0x0000000010001000
+  lbz r3, 0(r4)
+  blr
+  #_ REGISTER_OUT r3 0x0000000000000000
+  #_ REGISTER_OUT r4 0x0000000010001000
+
+test_lbz_offset:
+  #_ MEMORY_IN 0x0000000010001000 [11, 22, 33, 44, 55, 66, 77, 88]
+  #_ REGISTER_IN r4 0x0000000010001000
+  lbz r3, 4(r4)
+  blr
+  #_ REGISTER_OUT r3 0x0000000000000033
+  #_ REGISTER_OUT r4 0x0000000010001000
+
+test_lbzu_1:
+  #_ MEMORY_IN 0x0000000010001000 [AA, BB, CC, DD, EE, FF, 00, 11]
+  #_ REGISTER_IN r4 0x0000000010001000
+  lbzu r3, 4(r4)
+  blr
+  #_ REGISTER_OUT r3 0x00000000000000CC
+  #_ REGISTER_OUT r4 0x0000000010001004
+
+test_lbzx_1:
+  #_ MEMORY_IN 0x0000000010001000 [12, 34, 56, 78, 9A, BC, DE, F0]
+  #_ REGISTER_IN r4 0x0000000010001000
+  #_ REGISTER_IN r5 0x0000000000000003
+  lbzx r3, r4, r5
+  blr
+  #_ REGISTER_OUT r3 0x0000000000000000
+  #_ REGISTER_OUT r4 0x0000000010001000
+  #_ REGISTER_OUT r5 0x0000000000000003
+
+test_lbzux_1:
+  #_ MEMORY_IN 0x0000000010001000 [FF, EE, DD, CC, BB, AA, 99, 88]
+  #_ REGISTER_IN r4 0x0000000010001000
+  #_ REGISTER_IN r5 0x0000000000000005
+  lbzux r3, r4, r5
+  blr
+  #_ REGISTER_OUT r3 0x0000000000000000
+  #_ REGISTER_OUT r4 0x0000000010001005
+
+test_lbz_max:
+  #_ MEMORY_IN 0x0000000010001000 [FF, 00, 7F, 80, 01, FE, 02, FD]
+  #_ REGISTER_IN r4 0x0000000010001000
+  lbz r3, 0(r4)
+  blr
+  #_ REGISTER_OUT r3 0x0000000000000000
+  #_ REGISTER_OUT r4 0x0000000010001000