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Patched up DIVW(U)O(.)

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dingusdev 2020-02-09 13:59:30 -07:00
parent b057a8373d
commit a4d815344a
1 changed files with 26 additions and 6 deletions
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32
cpu/ppc/ppcopcodes.cpp
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@ -183,6 +183,15 @@ inline void ppc_setsoov(uint32_t a, uint32_t b, uint32_t d) {
}
}
inline void ppc_setsoov_divwo(uint32_t a, uint32_t d) {
if (d > a) {
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000UL;
}
else {
ppc_state.ppc_spr[SPR::XER] &= 0xBFFFFFFFUL;
}
}
/**
The core functionality of this PPC emulation is within all of these void functions.
This is where the opcode tables in the ppcemumain.h come into play - reducing the number of comparisons needed.
@ -972,16 +981,21 @@ void ppc_divwo() {
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
return;
case 0xFFFFFFFF:
if (ppc_result_a == 0x80000000) {
if (ppc_result_a == 0x80000000UL) {
ppc_result_d = 0xFFFFFFFF;
ppc_store_result_regd();
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
return;
}
else if (ppc_result_a == 0x7FFFFFFFUL) {
ppc_result_d = 0x80000001;
ppc_store_result_regd();
return;
}
default:
sidiv_result = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
ppc_result_d = sidiv_result;
ppc_setsoov(ppc_result_a, ppc_result_b, ppc_result_d);
ppc_setsoov_divwo(ppc_result_a, ppc_result_d);
ppc_store_result_regd();
}
}
@ -998,17 +1012,23 @@ void ppc_divwodot() {
ppc_state.ppc_cr |= 0x30000000;
return;
case 0xFFFFFFFF:
if (ppc_result_a == 0x80000000) {
if (ppc_result_a == 0x80000000UL) {
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
ppc_state.ppc_cr |= 0x90000000;
ppc_result_d = 0xFFFFFFFF;
ppc_store_result_regd();
return;
}
else if (ppc_result_a == 0x7FFFFFFFUL) {
ppc_result_d = 0x80000001;
ppc_state.ppc_cr |= 0x80000000;
ppc_store_result_regd();
return;
}
default:
sidiv_result = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
ppc_result_d = (uint32_t)sidiv_result;
ppc_setsoov(ppc_result_a, ppc_result_b, ppc_result_d);
ppc_setsoov_divwo(ppc_result_a, ppc_result_d);
ppc_changecrf0(ppc_result_d);
ppc_store_result_regd();
}
@ -1059,9 +1079,9 @@ void ppc_divwuo() {
ppc_store_result_regd();
return;
default:
ppc_setsoov(ppc_result_a, ppc_result_b, ppc_result_d);
uidiv_result = ppc_result_a / ppc_result_b;
ppc_result_d = uidiv_result;
ppc_setsoov_divwo(ppc_result_a, ppc_result_d);
ppc_store_result_regd();
}
}
@ -1078,9 +1098,9 @@ void ppc_divwuodot() {
ppc_state.ppc_cr |= 0x30000000;
return;
default:
ppc_setsoov(ppc_result_a, ppc_result_b, ppc_result_d);
uidiv_result = ppc_result_a / ppc_result_b;
ppc_result_d = uidiv_result;
ppc_setsoov_divwo(ppc_result_a, ppc_result_d);
ppc_changecrf0(ppc_result_d);
ppc_store_result_regd();
}