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ppcopcodes: fix lswi/stswi emulation.

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This commit is contained in:
Maxim Poliakovski 2022-02-19 23:21:18 +01:00
parent 477ad7ddee
commit 123f820775
1 changed files with 22 additions and 36 deletions
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50
cpu/ppc/ppcopcodes.cpp
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@ -1947,40 +1947,32 @@ void dppc_interpreter::ppc_lswi() {
#endif
ppc_grab_regsda();
ppc_effective_address = reg_a ? ppc_result_a : 0;
grab_inb = (ppc_cur_instruction >> 11) & 31;
grab_inb = (ppc_cur_instruction >> 11) & 0x1F;
grab_inb = grab_inb ? grab_inb : 32;
uint32_t stringed_word = 0;
while (grab_inb > 0) {
switch (grab_inb) {
case 1:
stringed_word = mmu_read_vmem<uint8_t>(ppc_effective_address) << 24;
//stringed_word = mem_grab_byte(ppc_effective_address) << 24;
ppc_state.gpr[reg_d] = stringed_word;
ppc_state.gpr[reg_d] = mmu_read_vmem<uint8_t>(ppc_effective_address) << 24;
grab_inb = 0;
break;
case 2:
stringed_word = mmu_read_vmem<uint8_t>(ppc_effective_address) << 24;
//stringed_word = mem_grab_byte(ppc_effective_address) << 24;
stringed_word += mmu_read_vmem<uint8_t>(ppc_effective_address + 1) << 16;
//stringed_word += mem_grab_byte(ppc_effective_address + 1) << 16;
ppc_state.gpr[reg_d] = stringed_word;
ppc_state.gpr[reg_d] = mmu_read_vmem<uint16_t>(ppc_effective_address) << 16;
grab_inb = 0;
break;
case 3:
stringed_word = mmu_read_vmem<uint8_t>(ppc_effective_address) << 24;
//stringed_word = mem_grab_byte(ppc_effective_address) << 24;
stringed_word += mmu_read_vmem<uint8_t>(ppc_effective_address + 1) << 16;
//stringed_word += mem_grab_byte(ppc_effective_address + 1) << 16;
stringed_word = mmu_read_vmem<uint16_t>(ppc_effective_address) << 16;
stringed_word += mmu_read_vmem<uint8_t>(ppc_effective_address + 2) << 8;
//stringed_word += mem_grab_byte(ppc_effective_address + 2) << 8;
ppc_state.gpr[reg_d] = stringed_word;
grab_inb = 0;
break;
default:
//ppc_state.gpr[reg_d] = mem_grab_word(ppc_effective_address);
ppc_state.gpr[reg_d] = mmu_read_vmem<uint16_t>(ppc_effective_address);
ppc_state.gpr[reg_d] = mmu_read_vmem<uint32_t>(ppc_effective_address);
reg_d++;
if (reg_d >= 32) { // wrap around through GPR0
reg_d = 0;
}
ppc_effective_address += 4;
grab_inb -= 4;
}
@ -2036,36 +2028,30 @@ void dppc_interpreter::ppc_stswi() {
#endif
ppc_grab_regssa();
ppc_effective_address = reg_a ? ppc_result_a : 0;
grab_inb = (ppc_cur_instruction >> 11) & 31;
grab_inb = (grab_inb & 32) == 0 ? 32 : grab_inb;
grab_inb = (ppc_cur_instruction >> 11) & 0x1F;
grab_inb = grab_inb ? grab_inb : 32;
while (grab_inb > 0) {
switch (grab_inb) {
case 1:
mmu_write_vmem<uint8_t>(ppc_effective_address, (ppc_result_d >> 24));
//mem_write_byte(ppc_effective_address, (ppc_result_d >> 24));
mmu_write_vmem<uint8_t>(ppc_effective_address, ppc_state.gpr[reg_s] >> 24);
grab_inb = 0;
break;
case 2:
mmu_write_vmem<uint8_t>(ppc_effective_address, ((ppc_result_d >> 24) & 0xFF));
//mem_write_byte(ppc_effective_address, ((ppc_result_d >> 24) & 0xFF));
mmu_write_vmem<uint8_t>((ppc_effective_address + 1), ((ppc_result_d >> 16) & 0xFF));
//mem_write_byte((ppc_effective_address + 1), ((ppc_result_d >> 16) & 0xFF));
mmu_write_vmem<uint16_t>(ppc_effective_address, ppc_state.gpr[reg_s] >> 16);
grab_inb = 0;
break;
case 3:
mmu_write_vmem<uint8_t>(ppc_effective_address, ((ppc_result_d >> 24) & 0xFF));
//mem_write_byte(ppc_effective_address, ((ppc_result_d >> 24) & 0xFF));
mmu_write_vmem<uint8_t>((ppc_effective_address + 1), ((ppc_result_d >> 16) & 0xFF));
//mem_write_byte((ppc_effective_address + 1), ((ppc_result_d >> 16) & 0xFF));
mmu_write_vmem<uint8_t>((ppc_effective_address + 2), ((ppc_result_d >> 8) & 0xFF));
//mem_write_byte((ppc_effective_address + 2), ((ppc_result_d >> 8) & 0xFF));
mmu_write_vmem<uint16_t>(ppc_effective_address, ppc_state.gpr[reg_s] >> 16);
mmu_write_vmem<uint8_t>(ppc_effective_address + 2, (ppc_state.gpr[reg_s] >> 8) & 0xFF);
grab_inb = 0;
break;
default:
mmu_write_vmem<uint32_t>(ppc_effective_address, ppc_result_d);
//mem_write_dword(ppc_effective_address, ppc_result_d);
mmu_write_vmem<uint32_t>(ppc_effective_address, ppc_state.gpr[reg_s]);
reg_s++;
if (reg_s >= 32) { // wrap around through GPR0
reg_s = 0;
}
ppc_effective_address += 4;
grab_inb -= 4;
}