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ppcopcodes: fix timebase read & write.

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This commit is contained in:
Maxim Poliakovski 2020-03-02 00:01:05 +01:00
parent f5e8c9cbb8
commit 0eb557751b
1 changed files with 6 additions and 6 deletions
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12
cpu/ppc/ppcopcodes.cpp
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@ -1320,12 +1320,12 @@ void ppc_mtspr() {
switch (ref_spr) {
//Mirror the TBRs in the SPR range to the user-mode TBRs.
case 284:
ppc_state.ppc_spr[284] = (uint32_t)timebase_counter;
ppc_state.ppc_tbr[TBR::TBL] = (uint32_t)timebase_counter;
timebase_counter = (timebase_counter & 0xFFFFFFFF00000000ULL) +
ppc_state.ppc_gpr[reg_s];
break;
case 285:
ppc_state.ppc_spr[285] = (uint32_t)(timebase_counter >> 32);
ppc_state.ppc_tbr[TBR::TBU] = (uint32_t)(timebase_counter >> 32);
timebase_counter = (timebase_counter & 0x00000000FFFFFFFFULL) +
(((uint64_t)(ppc_state.ppc_gpr[reg_s])) << 32);
break;
case 528:
case 529:
@ -1354,10 +1354,10 @@ void ppc_mftb() {
reg_d = (ppc_cur_instruction >> 21) & 31;
switch (ref_spr) {
case 268:
ppc_state.ppc_gpr[reg_d] = ppc_state.ppc_tbr[TBR::TBL];
ppc_state.ppc_gpr[reg_d] = timebase_counter & 0xFFFFFFFFUL;
break;
case 269:
ppc_state.ppc_gpr[reg_d] = ppc_state.ppc_tbr[TBR::TBU];
ppc_state.ppc_gpr[reg_d] = (timebase_counter >> 32) & 0xFFFFFFFFUL;
break;
default:
std::cout << "Invalid TBR access attempted!" << std::endl;