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Cop0's Index as a union

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SimoneN64
2023-08-28 15:58:18 +02:00
parent 1a338de8b9
commit 367a82c11d
3 changed files with 34 additions and 24 deletions
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32
src/backend/core/registers/cop/cop0instructions.cpp
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@@ -32,12 +32,11 @@ void Cop0::eret(Registers& regs) {
void Cop0::tlbr() {
u8 Index = index & 0b111111;
if (Index >= 32) {
Util::panic("TLBR with TLB index {}", index);
if (index.i >= 32) {
Util::panic("TLBR with TLB index {}", index.i);
}
TLBEntry entry = tlb[Index];
TLBEntry entry = tlb[index.i];
entryHi.raw = entry.entryHi.raw;
entryLo0.raw = entry.entryLo0.raw & 0x3FFFFFFF;
@@ -48,34 +47,35 @@ void Cop0::tlbr() {
pageMask.raw = entry.pageMask.raw;
}
void Cop0::tlbw(int index) {
void Cop0::tlbw(int index_) {
PageMask page_mask{};
page_mask = pageMask;
u32 top = page_mask.mask & 0xAAA;
page_mask.mask = top | (top >> 1);
if(index >= 32) {
Util::panic("TLBWI with TLB index {}", index);
if(index_ >= 32) {
Util::panic("TLBWI with TLB index {}", index_);
}
tlb[index].entryHi.raw = entryHi.raw;
tlb[index].entryHi.vpn2 &= ~page_mask.mask;
tlb[index_].entryHi.raw = entryHi.raw;
tlb[index_].entryHi.vpn2 &= ~page_mask.mask;
tlb[index].entryLo0.raw = entryLo0.raw & 0x03FFFFFE;
tlb[index].entryLo1.raw = entryLo1.raw & 0x03FFFFFE;
tlb[index].pageMask.raw = page_mask.raw;
tlb[index_].entryLo0.raw = entryLo0.raw & 0x03FFFFFE;
tlb[index_].entryLo1.raw = entryLo1.raw & 0x03FFFFFE;
tlb[index_].pageMask.raw = page_mask.raw;
tlb[index].global = entryLo0.g && entryLo1.g;
tlb[index].initialized = true;
tlb[index_].global = entryLo0.g && entryLo1.g;
tlb[index_].initialized = true;
}
void Cop0::tlbp(Registers& regs) {
int match = -1;
TLBEntry* entry = TLBTryMatch(regs, entryHi.raw, &match);
if(entry && match >= 0) {
index = match;
index.i = match;
index.p = 0;
} else {
index = 0x80000000;
index.p = 1;
}
}