Difference between revisions of "Move find item flag calculation"
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| − | + | #Parameters: | |
| + | #r4 = map ID | ||
| + | #r5 = trap type | ||
| + | #r6 = activation type | ||
| + | 0 = trap | ||
| + | 1 = item | ||
| + | |||
| + | #Returns: | ||
| + | #r2 = activation outcome | ||
| + | 0 = no item found or no trap activated | ||
| + | 1 = item found or trap activated | ||
| + | |||
| − | |||
001804c4: 000417c2 srl r2,r4,0x1f | 001804c4: 000417c2 srl r2,r4,0x1f | ||
001804c8: 00821021 addu r2,r4,r2 | 001804c8: 00821021 addu r2,r4,r2 | ||
| − | 001804cc: 00023843 sra r7,r2,0x01 | + | 001804cc: 00023843 sra r7,r2,0x01 #r7 = (map ID) / 2 ? |
001804d0: 30840001 andi r4,r4,0x0001 | 001804d0: 30840001 andi r4,r4,0x0001 | ||
001804d4: 00042080 sll r4,r4,0x02 | 001804d4: 00042080 sll r4,r4,0x02 | ||
| − | 001804d8: 00852021 addu r4,r4,r5 | + | 001804d8: 00852021 addu r4,r4,r5 #r4 = ((mapID % 2) * 4) + trap type |
001804dc: 34020080 ori r2,r0,0x0080 | 001804dc: 34020080 ori r2,r0,0x0080 | ||
| − | 001804e0: 10c0000b beq r6,r0,0x00180510 | + | 001804e0: 10c0000b beq r6,r0,0x00180510 #branch if trap |
001804e4: 00822007 srav r4,r2,r4 | 001804e4: 00822007 srav r4,r2,r4 | ||
| + | |||
| + | item? | ||
001804e8: 3c018006 lui r1,0x8006 | 001804e8: 3c018006 lui r1,0x8006 | ||
001804ec: 00270821 addu r1,r1,r7 | 001804ec: 00270821 addu r1,r1,r7 | ||
| − | 001804f0: 90239414 lbu r3,-0x6bec(r1) load move find item flags | + | 001804f0: 90239414 lbu r3,-0x6bec(r1) #load move find item flags for map |
001804f4: 00000000 nop | 001804f4: 00000000 nop | ||
| − | 001804f8: 00831825 or r3,r4,r3 | + | 001804f8: 00831825 or r3,r4,r3 #combine map flags with updated flags |
001804fc: 3c018006 lui r1,0x8006 | 001804fc: 3c018006 lui r1,0x8006 | ||
00180500: 00270821 addu r1,r1,r7 | 00180500: 00270821 addu r1,r1,r7 | ||
| − | 00180504: a0239414 sb r3,-0x6bec(r1) store new move find item flags | + | 00180504: a0239414 sb r3,-0x6bec(r1) #store new move find item flags for map |
| − | 00180508: 0806014a j 0x00180528 | + | 00180508: 0806014a j 0x00180528 #jump to End |
| − | 0018050c: 34020001 ori r2,r0,0x0001 | + | 0018050c: 34020001 ori r2,r0,0x0001 #return r2 = 1 |
| + | |||
| + | trap? | ||
00180510: 3c018006 lui r1,0x8006 | 00180510: 3c018006 lui r1,0x8006 | ||
00180514: 00270821 addu r1,r1,r7 | 00180514: 00270821 addu r1,r1,r7 | ||
| − | 00180518: 90229414 lbu r2,-0x6bec(r1) load move find item flags | + | 00180518: 90229414 lbu r2,-0x6bec(r1) #load move find item flags |
0018051c: 00000000 nop | 0018051c: 00000000 nop | ||
| − | 00180520: 00441024 and r2,r2,r4 | + | 00180520: 00441024 and r2,r2,r4 #compare map flags with updated flags |
| − | 00180524: 2c420001 sltiu r2,r2,0x0001 | + | 00180524: 2c420001 sltiu r2,r2,0x0001 #reverse flags (if item has been found, trap activates) |
| + | |||
| + | End: | ||
00180528: 03e00008 jr r31 | 00180528: 03e00008 jr r31 | ||
0018052c: 00000000 nop | 0018052c: 00000000 nop | ||
| − | + | ||
| + | == Return Locations == | ||
| + | |||
| + | 001802a0: [[Rare/common item determination]] | ||
| + | 001803e0: [[Set map Item/trap data]] | ||
Latest revision as of 01:29, 6 September 2024
#Parameters:
#r4 = map ID
#r5 = trap type
#r6 = activation type
0 = trap
1 = item
#Returns:
#r2 = activation outcome
0 = no item found or no trap activated
1 = item found or trap activated
001804c4: 000417c2 srl r2,r4,0x1f
001804c8: 00821021 addu r2,r4,r2
001804cc: 00023843 sra r7,r2,0x01 #r7 = (map ID) / 2 ?
001804d0: 30840001 andi r4,r4,0x0001
001804d4: 00042080 sll r4,r4,0x02
001804d8: 00852021 addu r4,r4,r5 #r4 = ((mapID % 2) * 4) + trap type
001804dc: 34020080 ori r2,r0,0x0080
001804e0: 10c0000b beq r6,r0,0x00180510 #branch if trap
001804e4: 00822007 srav r4,r2,r4
item?
001804e8: 3c018006 lui r1,0x8006
001804ec: 00270821 addu r1,r1,r7
001804f0: 90239414 lbu r3,-0x6bec(r1) #load move find item flags for map
001804f4: 00000000 nop
001804f8: 00831825 or r3,r4,r3 #combine map flags with updated flags
001804fc: 3c018006 lui r1,0x8006
00180500: 00270821 addu r1,r1,r7
00180504: a0239414 sb r3,-0x6bec(r1) #store new move find item flags for map
00180508: 0806014a j 0x00180528 #jump to End
0018050c: 34020001 ori r2,r0,0x0001 #return r2 = 1
trap?
00180510: 3c018006 lui r1,0x8006
00180514: 00270821 addu r1,r1,r7
00180518: 90229414 lbu r2,-0x6bec(r1) #load move find item flags
0018051c: 00000000 nop
00180520: 00441024 and r2,r2,r4 #compare map flags with updated flags
00180524: 2c420001 sltiu r2,r2,0x0001 #reverse flags (if item has been found, trap activates)
End:
00180528: 03e00008 jr r31
0018052c: 00000000 nop
Return Locations
001802a0: Rare/common item determination 001803e0: Set map Item/trap data
