Check whose turn it is?

check whose turn it is?
00181114: 00002021 addu r4,r0,r0
00181118: 3c038019 lui r3,0x8019
0018111c: 246308cc addiu r3,r3,0x08cc		unit data pointer
00181120: 90620186 lbu r2,0x0186(r3)		unit turn (if = 01)
00181124: 00000000 nop
00181128: 14400006 bne r2,r0,0x00181144
0018112c: 00601021 addu r2,r3,r0
00181130: 24840001 addiu r4,r4,0x0001
00181134: 28820015 slti r2,r4,0x0015		runs 15 times
00181138: 1440fff9 bne r2,r0,0x00181120
0018113c: 246301c0 addiu r3,r3,0x01c0		check next unit
00181140: 00001021 addu r2,r0,r0		
jr r31
nop