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core2/code_98CB0.c progress

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Banjo Kazooie
2022-08-26 15:26:03 -05:00
parent 4847a1bb32
commit 32bcaa10dd
2 changed files with 41 additions and 36 deletions
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73
src/core2/code_98CB0.c
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@@ -19,10 +19,12 @@ struct unkfunc_80304ED0 *func_80304ED0(void*, f32 *);
void func_8031CD44(s32, s32, f32, f32, s32);
void func_80256E24(f32 *, f32, f32, f32, f32, f32);
#define OBSCURE(ptr) (((((s32)(ptr) ^ 0x746DF219) & 0xFF) + ((((s32)(ptr) >> 0x18) & 0xFF) << 0x18) + ((((s32)(ptr) >> 8) & 0xFFFF) << 8)) ^ 0x19)
/* .data */
extern s32 D_8036DDF0;
/* .bss */
struct {
s32 unk0;
@@ -38,12 +40,30 @@ struct {
u8 D_803831F8[0x21]; //copy of D_803831D0
/* .code */
#pragma GLOBAL_ASM("asm/nonmatchings/core2/code_98CB0/func_8031FC40.s")
#pragma GLOBAL_ASM("asm/nonmatchings/core2/code_98CB0/func_8031FE40.s")
u32 func_8031FE40(void) {
u8 *obscured_addr;
u32 var_v1;
u32 var_a2;
u32 var_v0;
#pragma GLOBAL_ASM("asm/nonmatchings/core2/code_98CB0/func_8031FEC0.s")
var_v1 = 0xDE1C05;
var_v0 = 0x25;
obscured_addr = (u8*)OBSCURE(&D_803831A0.unk8[0]);
for(var_a2 = 0; var_a2 < var_v0; var_a2++){
var_v1 += ((var_v1 % 4) + var_a2) * obscured_addr[var_a2];
}
return var_v1;
}
void func_8031FEC0(void) {
u32 *obscured_addr;
obscured_addr = (u32*)OBSCURE(&D_803831A0.unk4);
*obscured_addr = func_8031FE40();
}
s32 func_8031FF1C(s32 index) {
return func_803200A4(D_803831A0.unk8, index);
@@ -132,29 +152,19 @@ s32 func_80320240(void){return 1;}
s32 func_80320248(void){return 1;}
// regalloc
// s32 func_80320250(void) {
// s32 addr = (s32) &D_803831D0.unk8[0];
// u32 checksum = 0x6CE9E91F;
// s32 len = 25;
// s32 scrambled;
// u32 i;
u32 func_80320250(void) {
u32 checksum = 0x6CE9E91F;
u8 *obscured_addr = (u8*)OBSCURE(&D_803831D0.unk8[0]);
s32 len = 25;
u32 i;
// // Scrambles the input address
// scrambled = (addr ^ 0x746DF219) & 0xFF; // scrambled = (low byte of addr) ^ 0x19
// scrambled += (addr >> 0x18) << 0x18; // scrambled = (high byte of addr | low byte of addr) ^ 0x19
// scrambled += ((addr >> 8) & 0xFFFF) << 8; // scrambled = addr ^ 0x19
// // Unscrambles the input address
// for (i = 0; i < len; i++) {
// s32 val = ((u8*)(scrambled ^ 0x19))[i];
// checksum = val ^ (((checksum + val & 0xF) << 0x18) ^ (checksum >> 3));
// }
// return checksum;
// }
#pragma GLOBAL_ASM("asm/nonmatchings/core2/code_98CB0/func_80320250.s")
for (i = 0; i < len; i++) {
s32 val = obscured_addr[i];
checksum = val ^ (((checksum + val & 0xF) << 0x18) ^ (checksum >> 3));
}
return checksum;
}
void func_803202D0(void) {
s32 addr = (s32) &D_803831D0.unk0;
@@ -187,16 +197,11 @@ s32 func_80320320(void) {
return checksum;
}
// regalloc
// void func_803203A0(void) {
// s32 addr = (s32) &D_803831D0.unk4;
// s32 scrambled;
// scrambled = (addr ^ 0x746DF219) & 0xFF; // scrambled = (low byte of addr) ^ 0x19
// scrambled += (addr >> 0x18) << 0x18; // scrambled = (high byte of addr | low byte of addr) ^ 0x19
// scrambled += ((addr >> 8) & 0xFFFF) << 8; // scrambled = addr ^ 0x19
// *(s32*)(scrambled ^ 0x19) = func_80320320();
// }
#pragma GLOBAL_ASM("asm/nonmatchings/core2/code_98CB0/func_803203A0.s")
void func_803203A0(void) {
u32 *obscured_addr = (u32*)OBSCURE(&D_803831D0.unk4);
*obscured_addr = func_80320320();
}
s32 func_803203FC(s32 index) {
return func_803200A4(D_803831D0.unk8, index);