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CopyTileMapEntry

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jiangzhengwenjz 2019-08-28 05:58:19 +08:00 committed by huderlem
parent 886f043025
commit 9aaf498471
1 changed files with 10 additions and 59 deletions
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69
src/bg.c
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@ -1174,78 +1174,29 @@ u32 GetTileMapIndexFromCoords(s32 x, s32 y, s32 screenSize, u32 screenWidth, u32
return (y * 0x20) + x; return (y * 0x20) + x;
} }
#ifdef NONMATCHING // This one has some weird switch statement cases that refuse to cooperate
void CopyTileMapEntry(const u16 *src, u16 *dest, s32 palette1, s32 tileOffset, s32 palette2) void CopyTileMapEntry(const u16 *src, u16 *dest, s32 palette1, s32 tileOffset, s32 palette2)
{ {
u16 var; u16 var;
if (palette1 == 16)
goto CASE_16;
switch (palette1) switch (palette1)
{ {
case 0 ... 16: case 0 ... 16:
if (palette1 != 16) var = ((*src + tileOffset) & 0xFFF) + ((palette1 + palette2) << 12);
var = ((*src + tileOffset) & 0xFFF) + ((palette1 + palette2) << 12); break;
else CASE_16:
var = ((*dest & 0xFC00) + (palette2 << 12)) | ((*src + tileOffset) & 0x3FF); var = *dest;
var &= 0xFC00;
var += palette2 << 12;
var |= (*src + tileOffset) & 0x3FF;
break; break;
default: default:
var = *src + tileOffset + (palette2 << 12); var = *src + tileOffset + (palette2 << 12);
break; break;
} }
*dest = var; *dest = var;
} }
#else
NAKED
void CopyTileMapEntry(const u16 *src, u16 *dest, s32 palette1, s32 tileOffset, s32 palette2)
{
asm("push {r4-r6,lr}\n\
add r4, r0, #0\n\
add r6, r1, #0\n\
ldr r5, [sp, #0x10]\n\
cmp r2, #0x10\n\
beq _08002B14\n\
cmp r2, #0x10\n\
bgt _08002B34\n\
cmp r2, #0\n\
blt _08002B34\n\
ldrh r0, [r4]\n\
add r0, r3\n\
ldr r3, =0x00000fff\n\
add r1, r3, #0\n\
and r0, r1\n\
add r1, r2, r5\n\
lsl r1, #12\n\
b _08002B3A\n\
.pool\n\
_08002B14:\n\
ldrh r1, [r6]\n\
mov r0, #0xFC\n\
lsl r0, #8\n\
and r1, r0\n\
lsl r2, r5, #12\n\
add r2, r1, r2\n\
ldrh r0, [r4]\n\
add r0, r3\n\
ldr r3, =0x000003ff\n\
add r1, r3, #0\n\
and r0, r1\n\
orr r0, r2\n\
b _08002B3C\n\
.pool\n\
_08002B34:\n\
ldrh r0, [r4]\n\
add r0, r3\n\
lsl r1, r5, #12\n\
_08002B3A:\n\
add r0, r1\n\
_08002B3C:\n\
lsl r0, #16\n\
lsr r1, r0, #16\n\
strh r1, [r6]\n\
pop {r4-r6}\n\
pop {r0}\n\
bx r0\n");
}
#endif // NONMATCHING
u32 GetBgType(u8 bg) u32 GetBgType(u8 bg)
{ {