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ppcopcodes: Don't change MQ if not MPC601.

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MQ should not be writable if not doing MPC601.
Fix is_601 and include_601.
This fixes risu tests.
This commit is contained in:
joevt 2024-11-27 03:24:52 -08:00 committed by dingusdev
parent 1d807d10e9
commit b38b1731a0
4 changed files with 13 additions and 9 deletions
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3
cpu/ppc/ppcemu.h
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@ -325,6 +325,7 @@ extern bool int_pin;
extern bool dec_exception_pending;
extern bool is_601; // For PowerPC 601 Emulation
extern bool include_601; // For non-PowerPC 601 emulation with 601 extras (matches Mac OS 9 environment which can emulate MPC 601 instructions)
extern bool is_altivec; // For Altivec Emulation
extern bool is_64bit; // For PowerPC G5 Emulation
@ -417,7 +418,7 @@ void ppc_opcode31();
void ppc_opcode59();
void ppc_opcode63();
void initialize_ppc_opcode_tables(bool include_601);
void initialize_ppc_opcode_tables();
extern double fp_return_double(uint32_t reg);
extern uint64_t fp_return_uint64(uint32_t reg);

8
cpu/ppc/ppcexec.cpp
View File

@ -56,6 +56,7 @@ using namespace dppc_interpreter;
MemCtrlBase* mem_ctrl_instance = 0;
bool is_601 = false;
bool include_601 = false;
bool is_deterministic = false;
@ -637,7 +638,7 @@ do { \
#define OP63d(subopcode, fn) OPXd(SubOpcode63, subopcode, fn)
#define OP63dc(subopcode, fn, carry) OPXdc(SubOpcode63, subopcode, fn, carry)
void initialize_ppc_opcode_tables(bool include_601) {
void initialize_ppc_opcode_tables() {
std::fill_n(OpcodeGrabber, 64, ppc_illegalop);
OP(3, ppc_twi);
//OP(4, ppc_opcode4); - Altivec instructions not emulated yet. Uncomment once they're implemented.
@ -873,7 +874,7 @@ void initialize_ppc_opcode_tables(bool include_601) {
}
}
void ppc_cpu_init(MemCtrlBase* mem_ctrl, uint32_t cpu_version, bool include_601, uint64_t tb_freq)
void ppc_cpu_init(MemCtrlBase* mem_ctrl, uint32_t cpu_version, bool do_include_601, uint64_t tb_freq)
{
mem_ctrl_instance = mem_ctrl;
@ -882,8 +883,9 @@ void ppc_cpu_init(MemCtrlBase* mem_ctrl, uint32_t cpu_version, bool include_601,
ppc_state.spr[SPR::PVR] = cpu_version;
is_601 = (cpu_version >> 16) == 1;
include_601 = !is_601 & do_include_601;
initialize_ppc_opcode_tables(include_601);
initialize_ppc_opcode_tables();
// initialize emulator timers
TimerManager::get_instance()->set_time_now_cb(&get_virt_time_ns);

8
cpu/ppc/ppcopcodes.cpp
View File

@ -903,7 +903,7 @@ void dppc_interpreter::ppc_mfspr() {
switch (ref_spr) {
case SPR::MQ:
if (!is_601) {
if (!(is_601 || include_601)) {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
ppc_state.gpr[reg_d] = ppc_state.spr[ref_spr];
@ -957,10 +957,10 @@ void dppc_interpreter::ppc_mtspr() {
switch (ref_spr) {
case SPR::MQ:
if (!is_601) {
if (is_601 || include_601)
ppc_state.spr[ref_spr] = val;
else
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
ppc_state.spr[ref_spr] = val;
break;
case SPR::RTCL_U:
case SPR::RTCU_U:

3
cpu/ppc/test/ppctests.cpp
View File

@ -321,7 +321,8 @@ static void read_test_float_data() {
}
int main() {
initialize_ppc_opcode_tables(true); //kludge
is_601 = true;
initialize_ppc_opcode_tables(); //kludge
cout << "Running DingusPPC emulator tests..." << endl << endl;