randu           LDR R0,seed
                LDR R1,magic
                MUL R0,R0,R1
                LDR R2,mask
                AND R0,R0,R2
                STR R0,seed
                MOV R0, R0 ASR #8 ; shift R0 right by 8 bits
                AND R0, R0, #0x3f  ; take the modulo by 64
                MOV PC,R14