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ppcopcodes: fix stwcx. emulation.

This commit is contained in:
Maxim Poliakovski 2023-08-21 04:50:02 +02:00
parent 300965ab10
commit 932f2bbceb
1 changed files with 3 additions and 5 deletions
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8
cpu/ppc/ppcopcodes.cpp
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@ -1687,19 +1687,17 @@ void dppc_interpreter::ppc_stwcx() {
#ifdef CPU_PROFILING
num_int_stores++;
#endif
// PLACEHOLDER CODE FOR STWCX - We need to check for reserve memory
if (rc_flag == 0) {
ppc_illegalop();
} else {
ppc_grab_regssab();
ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
ppc_state.cr &= 0x0FFFFFFFUL; // clear CR0
ppc_state.cr |= (ppc_state.spr[SPR::XER] & 0x80000000UL) >> 3; // copy XER[SO] to CR0[SO]
if (ppc_state.reserve) {
mmu_write_vmem<uint32_t>(ppc_effective_address, ppc_result_d);
//mem_write_dword(ppc_effective_address, ppc_result_d);
ppc_state.cr |= (ppc_state.spr[SPR::XER] & 0x80000000) ? 0x30000000 : 0x20000000;
ppc_state.reserve = false;
} else {
ppc_state.cr |= (ppc_state.spr[SPR::XER] & 0x80000000) ? 0x10000000 : 0;
ppc_state.cr |= 0x20000000UL; // set CR0[EQ]
}
}
}