Usable Ability Setting

Usable Ability Setting
0019a5f8: 27bdffb8 addiu r29,r29,0xffb8
0019a5fc: afb60038 sw r22,0x0038(r29)
0019a600: 0080b021 addu r22,r4,r0		r22 = Unit's ID
0019a604: afb40030 sw r20,0x0030(r29)
0019a608: 00a0a021 addu r20,r5,r0		r20 = Unit's Skillset
0019a60c: afb3002c sw r19,0x002c(r29)
0019a610: 00c09821 addu r19,r6,r0		r19 = Counter
0019a614: afbf0044 sw r31,0x0044(r29)
0019a618: afbe0040 sw r30,0x0040(r29)
0019a61c: afb7003c sw r23,0x003c(r29)
0019a620: afb50034 sw r21,0x0034(r29)
0019a624: afb20028 sw r18,0x0028(r29)
0019a628: afb10024 sw r17,0x0024(r29)
0019a62c: 16800010 bne r20,r0,0x 0019a670	Branch if Skillset != 0
0019a630: afb00020 sw r16,0x0020(r29)
0019a634: 08066a87 j 0x 0019aa1c
0019a638: 02601021 addu r2,r19,r0		r2 = Counter