Difference between revisions of "Check Horizontal Jump option"
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m (Orkney moved page 0017622c - 001764d4 to Check Horizontal Jump option) |
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Latest revision as of 19:06, 30 May 2023
BATTLE.BIN : Check Horizontal Jump option
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Parameters : r4 : Destination Tile ID (X-Y) without elevation
r5 : Origin exit side slope type (Opposite destination side slope type)
r6 : Destination Entry side slope type
r7 : Origin Exit side Height
Returns r2 = 0x00 if Jump is possible
r2 = 0x01 if Acting Unit cannot jump above destination (tile/unit in the way)
Note : Im' sick of these tedious height check. I don't get the details (and notes might be inaccurate)
But with the context of the calling routine. I assume this routine checks Horizontal Jumpability.
Loop 4 Times : both elevation - Empty / Occupied Tile
------------------------------------------------------------------------------------------------------------
0017622c: 0080c021 addu r24,r4,r0 |
00176230: 340d007f ori r13,r0,0x007f |
00176234: 00006021 addu r12,r0,r0 |Initialize counter
00176238: 3c0f8019 lui r15,0x8019 |
0017623c: 8deff4f0 lw r15,-0x0b10(r15) |Pointer to Scratch Pad (0x1f800200)
00176240: 3c098019 lui r9,0x8019 |
00176244: 8d29f4e4 lw r9,-0x0b1c(r9) |Pointer to Scratch Pad (0x1f800180)
00176248: 3c028019 lui r2,0x8019 |
0017624c: 8c42f4e0 lw r2,-0x0b20(r2) |Pointer to Scratch Pad (0x1f800000)
00176250: 3c0e8019 lui r14,0x8019 |
00176254: 8dcef4e8 lw r14,-0x0b18(r14) |Poiter to Other units Scratchpad ( 0x1f800080 )
00176258: 9042001b lbu r2,0x001b(r2) |Acting Unit Size
0017625c: 30eb00ff andi r11,r7,0x00ff |
00176260: a1220053 sb r2,0x0053(r9) |Store acting unit size
@LOOP - 4 Times
00176264: 000c17c2 srl r2,r12,0x1f |
00176268: 01821021 addu r2,r12,r2 |
0017626c: 00021043 sra r2,r2,0x01 |Counter/2
00176270: 00021200 sll r2,r2,0x08 |Elevation Offset (0 / 0 / 0x100 / 0x100)
00176274: 00582021 addu r4,r2,r24 |Tile ID 2 times low elevation, 2 times high elevation
00176278: 000418c0 sll r3,r4,0x03 |Tile ID * 8
0017627c: 3c028019 lui r2,0x8019 |
00176280: 2442f8cc addiu r2,r2,-0x0734 |
00176284: 00624021 addu r8,r3,r2 |Pointer : This iteration Tile data (8018f8cc)
00176288: 31820001 andi r2,r12,0x0001 |Uneven counter flag
0017628c: 1040002b beq r2,r0,0x0017633c #If 2nd Loop on Low or High Elevation
00176290: 01e41021 addu r2,r15,r4 |Pointer to this Tile S-Pad 0x200 data
00176294: 90420000 lbu r2,0x0000(r2) |Load Tile Flag
00176298: 34030004 ori r3,r0,0x0004 |
0017629c: 3042000c andi r2,r2,0x000c |Keep only 0x08 and 0x04
001762a0: 14430082 bne r2,r3,0x001764ac #If Flags 0x08 and 0x04 are ON /Else branch to Next iteration Ally Unit with stepping stone
001762a4: 00041080 sll r2,r4,0x02 |
001762a8: 00441021 addu r2,r2,r4 |Tile ID * 5
001762ac: 3c018019 lui r1,0x8019 |
001762b0: 00220821 addu r1,r1,r2 |Part of Pointer to Grid Data
001762b4: 90222dda lbu r2,0x2dda(r1) |Grid 0x02 - ID of unit on tile
001762b8: 00000000 nop |
001762bc: a1220050 sb r2,0x0050(r9) |Store Unit ID
001762c0: 91230050 lbu r3,0x0050(r9) |Unit ID
001762c4: 00000000 nop |
001762c8: 000310c0 sll r2,r3,0x03 |
001762cc: 00431023 subu r2,r2,r3 |Id *7
001762d0: 004e1821 addu r3,r2,r14 |Pointer : Destination Unit data in S-Pad 0x80
001762d4: 90620003 lbu r2,0x0003(r3) |Unit Flag + ID
001762d8: 00000000 nop |
001762dc: 30420040 andi r2,r2,0x0040 |
001762e0: 10400072 beq r2,r0,0x001764ac #If Unit is an Ally / Else branch to Next iteration
001762e4: 00000000 nop |
001762e8: 90640005 lbu r4,0x0005(r3) |Destination Unit Height
001762ec: 00000000 nop |
001762f0: 24880003 addiu r8,r4,0x0003 |Unit Height + 3
001762f4: 310300ff andi r3,r8,0x00ff |
001762f8: 0163102b sltu r2,r11,r3 |
001762fc: 10400007 beq r2,r0,0x0017631c #If Origin Height < Unit Height + 3
00176300: 00000000 nop |
00176304: 91220053 lbu r2,0x0053(r9) |Acting Unit Size
00176308: 00000000 nop |
0017630c: 01621021 addu r2,r11,r2 |Origin + Acting unit size
00176310: 0062102a slt r2,r3,r2 |1 UH+3 < O+AUS
00176314: 1440006e bne r2,r0,0x001764d0 #If Destination Unit Height + 3 < Origin Height + Unit size : branch to End - returns 0x01
00176318: 34020001 ori r2,r0,0x0001 |
0017631c: 91230050 lbu r3,0x0050(r9) |Unit ID
00176320: 00000000 nop |
00176324: 000310c0 sll r2,r3,0x03 |
00176328: 00431023 subu r2,r2,r3 |ID*7
0017632c: 004e1021 addu r2,r2,r14 |Pointer : Destination Unit data in S-Pad 0x80
00176330: 90480006 lbu r8,0x0006(r2) |Destination Unit Height + Size
00176334: 0805d90a j 0x00176428 >>Jump to check some height data (Lower height is Tile height, Higher is Unit Height)
00176338: 308300ff andi r3,r4,0x00ff |Destination Unit Height
Else : 1st Loop on Low/High elevation Tile
0017633c: 90430000 lbu r3,0x0000(r2) |Tile's flags
00176340: 00000000 nop |
00176344: 30620080 andi r2,r3,0x0080 |
00176348: 10400005 beq r2,r0,0x00176360 #If Tile is Unselectable
0017634c: 30620004 andi r2,r3,0x0004 |
00176350: 10400056 beq r2,r0,0x001764ac #If Archangel is on Tile / Else branch to Next iteration 0x04 is Unit on Tile - Archangel enables 0x80
00176354: 34020001 ori r2,r0,0x0001 |
00176358: 0805d934 j 0x001764d0 >>Jump to End - returns 0x01
0017635c: 00000000 nop |
Else : Tile is Selectable
00176360: 91020002 lbu r2,0x0002(r8) |Tile Height
00176364: 00000000 nop |
00176368: 00021040 sll r2,r2,0x01 |
0017636c: a1220050 sb r2,0x0050(r9) |Store Destination Height * 2
00176370: 91020003 lbu r2,0x0003(r8) |Tile Halves + Depth
00176374: 00000000 nop |
00176378: 3042001f andi r2,r2,0x001f |
0017637c: a1220051 sb r2,0x0051(r9) |Store Destination Halves
00176380: 91020004 lbu r2,0x0004(r8) |Destination Slope Type
00176384: 00000000 nop |
00176388: a1220052 sb r2,0x0052(r9) |Store Destination Slope Type
0017638c: 91230052 lbu r3,0x0052(r9) |Destination Slope Type
00176390: 91240051 lbu r4,0x0051(r9) |Destination Halves
00176394: 00a31007 srav r2,r3,r5 |Opposite Side Slope
00176398: 30420003 andi r2,r2,0x0003 |
0017639c: 00820018 mult r4,r2 |
001763a0: 00001012 mflo r2 |Destination opposite Side Slope height
001763a4: 00c31807 srav r3,r3,r6 |Destination Entry side Slope
001763a8: 30630003 andi r3,r3,0x0003 |
001763ac: 00830018 mult r4,r3 |
001763b0: 91230050 lbu r3,0x0050(r9) |
001763b4: 00000000 nop |
001763b8: 00625021 addu r10,r3,r2 |Destination opposite side Height
001763bc: 00001012 mflo r2 |Destination entry Side Slope height
001763c0: 00622021 addu r4,r3,r2 |Destination entry side Height
001763c4: 314300ff andi r3,r10,0x00ff |Opposite side
001763c8: 308200ff andi r2,r4,0x00ff |Entry side
001763cc: 0043102b sltu r2,r2,r3 |
001763d0: 1040000c beq r2,r0,0x00176404 #If Entry Side is below Opposite side
001763d4: 00000000 nop |
001763d8: 91020005 lbu r2,0x0005(r8) |Destination 0x05
001763dc: 91030003 lbu r3,0x0003(r8) |Destination Halves + Depth
001763e0: 3042001f andi r2,r2,0x001f |
001763e4: 00021040 sll r2,r2,0x01 |Thickness * 2
001763e8: 00824023 subu r8,r4,r2 |Entry height - Thickness Lower - Thickness
001763ec: 00031942 srl r3,r3,0x05 |Depth
001763f0: 00031840 sll r3,r3,0x01 |Depth * 2
001763f4: a1280050 sb r8,0x0050(r9) |Store Ceiling Height
001763f8: 91240050 lbu r4,0x0050(r9) |Load Ceiling
001763fc: 0805d909 j 0x00176424 |
00176400: 01434021 addu r8,r10,r3 |Opposite Side + depth Higher + depth
00176404: 91020003 lbu r2,0x0003(r8) |Destination Halves + Depth
00176408: 91030005 lbu r3,0x0005(r8) |Destination 0x05
0017640c: 00021142 srl r2,r2,0x05 |
00176410: 00021040 sll r2,r2,0x01 |Depth*2
00176414: 00824021 addu r8,r4,r2 |Entry height + depth
00176418: 3063001f andi r3,r3,0x001f |
0017641c: 00031840 sll r3,r3,0x01 |Thickness * 2
00176420: 01432023 subu r4,r10,r3 |Opposite Height - Thickness
00176424: 308300ff andi r3,r4,0x00ff |Ceiling
--- 2nd section jump here
00176428: 31a200ff andi r2,r13,0x00ff |0x7f
0017642c: 0062102b sltu r2,r3,r2 |
00176430: 10400002 beq r2,r0,0x0017643c #If Ceiling < 0x7f Or Low elevation Height
00176434: 0163102b sltu r2,r11,r3 |
00176438: 00806821 addu r13,r4,r0 |r13 Becomes ceiling or lower height
0017643c: 10400007 beq r2,r0,0x0017645c #If Origin Exit Side Height < Ceiling
00176440: 00000000 nop |
00176444: 91220053 lbu r2,0x0053(r9) |Acting Unit Size
00176448: 00000000 nop |
0017644c: 01621021 addu r2,r11,r2 |Origin Heigt + Acting Unit Size
00176450: 0062102a slt r2,r3,r2 |
00176454: 1440001e bne r2,r0,0x001764d0 #If Ceiling < Origin Height + Acting Unit Size {{f/loc| Exit and returns 0x01
00176458: 34020001 ori r2,r0,0x0001 |
0017645c: 310300ff andi r3,r8,0x00ff |Higher height + depth
00176460: 0163102b sltu r2,r11,r3 |
00176464: 10400008 beq r2,r0,0x00176488 #If Origin Height < Destination Height + depth
00176468: 308200ff andi r2,r4,0x00ff |
0017646c: 91220053 lbu r2,0x0053(r9) |Acting Unit Size
00176470: 00000000 nop |
00176474: 01621021 addu r2,r11,r2 |Origin Height + Acting Unit Size
00176478: 0062102a slt r2,r3,r2 |1 if destination < Origin
0017647c: 14400014 bne r2,r0,0x001764d0 #If Destination height + depth < Origin Height + Acting Unit Size {{f/loc| Exit and returns 0x01
00176480: 34020001 ori r2,r0,0x0001 |
00176484: 308200ff andi r2,r4,0x00ff |Lower Destination / Ceiling
00176488: 0162102b sltu r2,r11,r2 |
0017648c: 14400007 bne r2,r0,0x001764ac #If Origin Height > Lower destination Height
00176490: 310200ff andi r2,r8,0x00ff |
00176494: 91230053 lbu r3,0x0053(r9) |Acting Unit Size
00176498: 00000000 nop |
0017649c: 01631821 addu r3,r11,r3 |Origin Height + Acting Unit Size
001764a0: 0043102a slt r2,r2,r3 |
001764a4: 1040000a beq r2,r0,0x001764d0 #If Destination Height > Origin Height + Acting unit size {{f/loc| Exit and returns 0x01
001764a8: 34020001 ori r2,r0,0x0001 |
001764ac: 258c0001 addiu r12,r12,0x0001 |Counter +1
001764b0: 29820004 slti r2,r12,0x0004 |
001764b4: 1440ff6b bne r2,r0,0x00176264 Λ Loop 4 times
001764b8: 31a400ff andi r4,r13,0x00ff |
001764bc: 3403007f ori r3,r0,0x007f |
001764c0: 10830003 beq r4,r3,0x001764d0 #If There is no ceiling (still max value) {{f/loc| Exit and returns 0x00
001764c4: 00001021 addu r2,r0,r0 |
001764c8: 30e200ff andi r2,r7,0x00ff |
001764cc: 0044102b sltu r2,r2,r4 |Returns 0x01 if Origin Height < Ceiling
001764d0: 03e00008 jr r31
001764d4: 00000000 nop
Return Location
BATTLE.BIN 001765e8: 001764d8_-_001766b0 00177d7c: 00177c08_-_00177e60
