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ppcopcodes: fix STMW emulation.

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This commit is contained in:
Maxim Poliakovski 2020-04-21 04:47:51 +02:00
parent 3d13bc1ca6
commit 64d74228c2
1 changed files with 11 additions and 6 deletions
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17
cpu/ppc/ppcopcodes.cpp
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@ -2002,16 +2002,21 @@ void ppc_stwbrx() {
mem_write_dword(ppc_effective_address, ppc_result_d); mem_write_dword(ppc_effective_address, ppc_result_d);
} }
void ppc_stmw() { void ppc_stmw()
{
ppc_grab_regssa(); ppc_grab_regssa();
ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF)); ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0; ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
//How many words to store in memory - using a do-while for this
do { /* what should we do if EA is unaligned? */
mem_write_dword(ppc_effective_address, ppc_result_d); if (ppc_effective_address & 3) {
ppc_exception_handler(Except_Type::EXC_ALIGNMENT, 0x00000);
}
for (; reg_s <= 31; reg_s++) {
mem_write_dword(ppc_effective_address, ppc_state.gpr[reg_s]);
ppc_effective_address += 4; ppc_effective_address += 4;
reg_d++; }
} while (reg_d < 32);
} }
void ppc_lbz() { void ppc_lbz() {