dionmoustos/PokemonEmeraldSafariFrontier
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Decompiled 2 functions, unable to decompile 1.

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sub_81C795C could not be decompiled due to register naming issues.
However, its structure was correctly matched, so I have left the C
code and a comment explaining the issue.
This commit is contained in:
Phlosioneer
2019-02-13 21:37:34 -05:00
parent 34b16e9e78
commit a8d920cc45
2 changed files with 115 additions and 133 deletions
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99
src/pokenav_main.c
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@@ -13,9 +13,15 @@
#include "bg.h"
#include "menu.h"
#include "graphics.h"
#include "gba/macro.h"
#define UNKNOWN_OFFSET 100000
struct PaletteDescriptor {
void *palette;
u16 tag;
};
struct UnknownStruct_0203CF40 {
u32 (*field0)(void);
u32 field4;
@@ -49,14 +55,12 @@ extern void sub_81CAADC(void);
extern void sub_81C99D4(void);
extern void sub_81C7C94(void);
extern void sub_8199D98(void);
extern void sub_81C7944(void* palette, u32 a1, u32 a2);
extern void sub_81C7B74(void);
extern void sub_81C7C28(void);
extern void sub_81C7D28(void);
extern u32 atk47_cmd47(s32 a0);
extern u32 sub_81C791C(s32 a0);
u32 sub_81C791C(s32 a0);
bool32 sub_81C756C(u32 a0);
bool32 sub_81C76C4(void);
u32 AnyMonHasRibbon(void);
@@ -65,7 +69,9 @@ u32 sub_81C75D4(void);
u32 sub_81C76FC(void);
u32 sub_81C786C(void);
u32 sub_81C7764(s32 a0);
u32 atk47_cmd47(s32 a0);
bool32 sub_81C7738(void);
void CopyPaletteIntoBufferUnfaded(void *palette, u32 a1, u32 a2);
void sub_81C7834(u32 (*a0)(void), u32(*a1)(void));
void sub_81C7360(struct UnknownStruct_0203CF40 *a0);
void sub_81C7650(u32 index);
@@ -493,7 +499,7 @@ u32 sub_81C7764(s32 a0) {
decompress_and_copy_tile_data_to_vram(0, &gPokenavHeader_Gfx, 0, 0, 0);
SetBgTilemapBuffer(0, &v1->data[11]);
CopyToBgTilemapBuffer(0, &gPokenavHeader_Tilemap, 0, 0);
sub_81C7944(&gPokenavHeader_Pal, 0, 0x20);
CopyPaletteIntoBufferUnfaded(&gPokenavHeader_Pal, 0, 0x20);
CopyBgTilemapBufferToVram(0);
return 0;
case 2:
@@ -566,4 +572,89 @@ bool32 sub_81C78C0(void) {
v1 = sub_81C763C(0);
return sub_81C70D8(v1->fieldC);
}
u32 atk47_cmd47(s32 a0) {
switch (a0) {
default:
return 4;
case 1:
return 0;
case 0:
return 0;
case 2:
if ((u32)ChangeBgY(0, 384, 1) >= 0x2000) {
ChangeBgY(0, 0x2000, 0);
return 4;
} else {
return 2;
}
}
}
u32 sub_81C791C(s32 a0) {
if (ChangeBgY(0, 384, 2) <= 0) {
ChangeBgY(0, 0, 0);
return 4;
} else {
return 2;
}
}
void CopyPaletteIntoBufferUnfaded(void *palette, u32 bufferOffset, u32 size) {
CpuCopy16(palette, gPlttBufferUnfaded + bufferOffset, size);
}
__attribute__((naked))
void sub_81C795C(struct PaletteDescriptor *palettes) {
// This code matches the assembly almost exactly; however, gcc chooses
// to store `index` in r0 instead of r1.
#ifdef NONMATCHING
struct PaletteDescriptor *current;
u32 offset;
u32 index;
current = palettes;
for (;;) {
if (current->palette == NULL) {
break;
}
index = AllocSpritePalette(current->tag);
if (index == 0xFF) {
break;
}
offset = (index * 16) + 0x100;
CopyPaletteIntoBufferUnfaded(current->palette, offset, 0x20);
current++;
}
#else // NONMATCHING
asm(".syntax unified\n\
push {r4,lr}\n\
adds r4, r0, 0\n\
b _081C7974\n\
_081C7962:\n\
lsls r0, r1, 4\n\
movs r2, 0x80\n\
lsls r2, 1\n\
adds r1, r0, r2\n\
ldr r0, [r4]\n\
movs r2, 0x20\n\
bl CopyPaletteIntoBufferUnfaded\n\
adds r4, 0x8\n\
_081C7974:\n\
ldr r0, [r4]\n\
cmp r0, 0\n\
beq _081C7988\n\
ldrh r0, [r4, 0x4]\n\
bl AllocSpritePalette\n\
lsls r0, 24\n\
lsrs r1, r0, 24\n\
cmp r1, 0xFF\n\
bne _081C7962\n\
_081C7988:\n\
pop {r4}\n\
pop {r0}\n\
bx r0\n\
.syntax divided");
#endif // NONMATCHING
}