ref: c31c4ca7b37ae113e9df810f03157c2fe7bb2708
dir: /sys/src/cmd/5l/l.s/
TEXT main(SB), $0 ADD R1,R4 ADD R1,R3,R4 ADD R1<<1,R3,R4 /* logical left */ ADD R1>>1,R3,R4 /* logical right */ ADD R1->1,R3,R4 /* arithmetic right */ ADD R1@>1,R3,R4 /* rotate right */ ADD R1<<R2,R3,R4 MOVW R1<<R2,R4 ADD $10,R1,R4 loop: ADD.S.NE R1,R4 BNE loop MRC.EQ 3,9,R3,C5,C6,2 MRC 3,9,R3,C5,C6,2 MOVW $(0xf<<28), CPSR MOVW.F R3, SPSR SWI 123 SWPW R1,(R2),R3 SWPBU.NE (R2),R3 SWPBU R1,(R2) MOVM.IA.S.W (R13),[R15] RFE