83 lines
1.8 KiB
C++
83 lines
1.8 KiB
C++
#include <core/registers/Cop0.hpp>
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#include <core/registers/Registers.hpp>
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#include <log.hpp>
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namespace n64 {
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void Cop0::mtc0(Registers& regs, u32 instr) {
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SetReg32(RD(instr), regs.gpr[RT(instr)]);
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}
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void Cop0::dmtc0(Registers& regs, u32 instr) {
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SetReg64(RD(instr), regs.gpr[RT(instr)]);
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}
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void Cop0::mfc0(Registers& regs, u32 instr) {
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regs.gpr[RT(instr)] = s32(GetReg32(RD(instr)));
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}
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void Cop0::dmfc0(Registers& regs, u32 instr) const {
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regs.gpr[RT(instr)] = s64(GetReg64(RD(instr)));
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}
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void Cop0::eret(Registers& regs) {
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if(status.erl) {
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regs.SetPC64(ErrorEPC);
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status.erl = false;
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} else {
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regs.SetPC64(EPC);
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status.exl = false;
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}
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regs.cop0.Update();
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llbit = false;
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}
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void Cop0::tlbr() {
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if (index.i >= 32) {
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Util::panic("TLBR with TLB index {}", index.i);
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}
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TLBEntry entry = tlb[index.i];
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entryHi.raw = entry.entryHi.raw;
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entryLo0.raw = entry.entryLo0.raw & 0x3FFFFFFF;
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entryLo1.raw = entry.entryLo1.raw & 0x3FFFFFFF;
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entryLo0.g = entry.global;
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entryLo1.g = entry.global;
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pageMask.raw = entry.pageMask.raw;
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}
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void Cop0::tlbw(int index_) {
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PageMask page_mask{};
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page_mask = pageMask;
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u32 top = page_mask.mask & 0xAAA;
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page_mask.mask = top | (top >> 1);
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if(index_ >= 32) {
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Util::panic("TLBWI with TLB index {}", index_);
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}
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tlb[index_].entryHi.raw = entryHi.raw;
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tlb[index_].entryHi.vpn2 &= ~page_mask.mask;
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tlb[index_].entryLo0.raw = entryLo0.raw & 0x03FFFFFE;
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tlb[index_].entryLo1.raw = entryLo1.raw & 0x03FFFFFE;
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tlb[index_].pageMask.raw = page_mask.raw;
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tlb[index_].global = entryLo0.g && entryLo1.g;
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tlb[index_].initialized = true;
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}
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void Cop0::tlbp(Registers& regs) {
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int match = -1;
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TLBEntry* entry = TLBTryMatch(regs, entryHi.raw, &match);
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if(entry && match >= 0) {
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index.raw = match;
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} else {
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index.raw = 0;
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index.p = 1;
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}
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}
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} |