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| author | Treeki <treeki@gmail.com> | 2011-03-12 23:17:12 +0100 |
|---|---|---|
| committer | Treeki <treeki@gmail.com> | 2011-03-12 23:17:12 +0100 |
| commit | 7d4e4c0b34a613dd3c0220475ae4e448197522c1 (patch) | |
| tree | 4f5cee367de3fdef4f9a7c84af59ffe76a2bb1c3 /src/tilegod.S | |
| download | kamek-7d4e4c0b34a613dd3c0220475ae4e448197522c1.tar.gz kamek-7d4e4c0b34a613dd3c0220475ae4e448197522c1.zip | |
initial commit. now I can start playing with stuff!
Diffstat (limited to 'src/tilegod.S')
| -rw-r--r-- | src/tilegod.S | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/tilegod.S b/src/tilegod.S new file mode 100644 index 0000000..248b3dc --- /dev/null +++ b/src/tilegod.S @@ -0,0 +1,65 @@ +.text
+
+#ifndef __MWERKS__
+.set r0,0; .set r1,1; .set r2,2; .set r3,3; .set r4,4
+.set r5,5; .set r6,6; .set r7,7; .set r8,8; .set r9,9
+.set r10,10; .set r11,11; .set r12,12; .set r13,13; .set r14,14
+.set r15,15; .set r16,16; .set r17,17; .set r18,18; .set r19,19
+.set r20,20; .set r21,21; .set r22,22; .set r23,23; .set r24,24
+.set r25,25; .set r26,26; .set r27,27; .set r28,28; .set r29,29
+.set r30,30; .set r31,31; .set f0,0; .set f2,2; .set f3,3
+#endif
+
+.align 4
+.extern ExitFromTileGodHack
+.extern TileTable
+
+.global NEW_GetTileFromTileTable
+NEW_GetTileFromTileTable:
+ andi. r0, r3, 0x8000
+ beq UseRegular
+
+ li r4, 0x7FFF
+ and r3, r3, r4
+ blr
+
+UseRegular:
+ lis r4, TileTable@h
+ ori r4, r4, TileTable@l
+
+ clrlslwi r0, r3, 16, 1
+ lhzx r3, r4, r0
+ blr
+
+
+.global TileGodHack
+TileGodHack:
+ lwz r4, 4(r3) # Load settings
+ extrwi. r0, r4, 1, 16 # Get and check the "use regular tile" flag
+ extrwi r4, r4, 3, 17 # Get the tile number OR tileset number
+ bne Special
+
+ lis r3, TileGodTiles@h
+ ori r3, r3, TileGodTiles@l
+ slwi r4, r4, 1
+ lhzx r25, r3, r4
+
+ b ExitFromTileGodHack
+
+Special:
+ lwz r3, 4(r3) # Load settings
+ srwi r3, r3, 20 # Get tile number
+ andi. r3, r3, 0xFF # Cut off top nybble
+ slwi r4, r4, 8 # Shift tileset number
+ or r3, r3, r4 # Add tileset number
+ ori r25, r3, 0x8000 # Add "get regular tile" flag
+
+ b ExitFromTileGodHack
+
+
+
+.data
+TileGodTiles:
+ .short 0x7C, 0x02, 0x0C, 0x7B, 0x0F, 0x00
+
+
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