PMDTOKI ダンジョン生成23bitLCG？

:022E59A8 02350C70 eoreqs r0,r5,#0x7000
:022E59AC E59F2048 ldr r2,[r15, #+0x48]     ;r15+0x48=*(022e59fc)=#37031024(0x02350c70)
:022E59B0 E5D20000 ldrb r0,[r2, #+0x0]      ;r2+0x0=*(02350c70)=#0(0x00000000)
:022E59B4 E3500000 cmp r0,#0x0
:022E59B8 E59F0040 ldr r0,[r15, #+0x40]     ;r15+0x40=*(022e5a00)=#1566083941(0x5d588b65)
:022E59BC 0A000006 beq 022E59DC
:022E59C0 E592300C ldr r3,[r2, #+0xc]       ;r2+0xc=*(02350c7c)=#1(0x00000001)
:022E59C4 E59F1038 ldr r1,[r15, #+0x38]     ;r15+0x38=*(022e5a04)=#2531011(0x00269ec3)
:022E59C8 E080C093 umull  r12,r0,r3,r0
:022E59CC E09C1001 adds r1,r12,r1
:022E59D0 E1A00801 mov  r0,r1,lsl #0x10     ;r0=-1631387648(0x9ec30000)
:022E59D4 E582100C str r1,[r2, #+0xc]       ;r2+0xc=*(02350c7c)=#1(0x00000001)
:022E59D8 EA000005 b 022E59F4
:022E59DC E5921004 ldr r1,[r2, #+0x4]       ;r2+0x4=*(02350c74)=#1(0x00000001)
:022E59E0 E0000091 mul  r0,r1,r0
:022E59E4 E2801001 add  r1,r0,#0x1
:022E59E8 E1A00821 mov  r0,r1,lsr #0x10     ;r0=0(0x0)
:022E59EC E1A00800 mov  r0,r0,lsl #0x10     ;r0=0(0x0)
:022E59F0 E5821004 str r1,[r2, #+0x4]       ;r2+0x4=*(02350c74)=#1(0x00000001)
:022E59F4 E1A00820 mov  r0,r0,lsr #0x10     ;r0=0(0x0)
:022E59F8 E12FFF1E bx r14 (Jump to addr_00000000?)