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Adding basic support for IRQs on the CPU side of things.

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This commit is contained in:
Adam Becker 2016-11-17 20:50:36 -07:00
parent af4a874f11
commit 13b27678b9
1 changed files with 19 additions and 6 deletions
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25
src/cpu/cpu_core.cpp
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@ -42,11 +42,24 @@ void cpu::run(int count) {
state.is_load_delay_slot = state.is_load;
state.is_load = false;
auto code = (cpu::state.code >> 26) & 63;
if (code)
op_table[code]();
else
op_table_special[(cpu::state.code >> 0) & 63]();
if (state.i_stat & state.i_mask) {
state.cop0.regs[13] |= (1 << 10);
} else {
state.cop0.regs[13] &= ~(1 << 10);
}
auto iec = state.cop0.regs[12] & 1;
auto irq = state.cop0.regs[12] & state.cop0.regs[13] & 0xf0;
if (iec && irq) {
enter_exception(0x0);
} else {
auto code = (cpu::state.code >> 26) & 63;
if (code)
op_table[code]();
else
op_table_special[(cpu::state.code >> 0) & 63]();
}
}
}
@ -184,6 +197,6 @@ uint32_t cpu::mmio_read(int, uint32_t address) {
void cpu::mmio_write(int, uint32_t address, uint32_t data) {
switch (address - 0x1f801070) {
case 0: state.i_stat = state.i_stat & data; break;
case 4: state.i_mask = data; break;
case 4: state.i_mask = data & 0x7ff; break;
}
}