Macintosh-Tools/dingusppc
1
0
Fork 0
mirror of https://github.com/dingusdev/dingusppc.git synced 2024-12-24 12:30:05 +00:00
Code Issues Projects Releases Wiki Activity

Patched up DIVW(U)O(.)

Browse Source
This commit is contained in:
dingusdev 2020-02-09 13:59:30 -07:00
parent b057a8373d
commit a4d815344a
1 changed files with 26 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
cpu/ppc/ppcopcodes.cpp
View File

@ -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. 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. 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; ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
return; return;
case 0xFFFFFFFF: case 0xFFFFFFFF:
if (ppc_result_a == 0x80000000) { if (ppc_result_a == 0x80000000UL) {
ppc_result_d = 0xFFFFFFFF; ppc_result_d = 0xFFFFFFFF;
ppc_store_result_regd(); ppc_store_result_regd();
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000; ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
return; return;
} }
else if (ppc_result_a == 0x7FFFFFFFUL) {
ppc_result_d = 0x80000001;
ppc_store_result_regd();
return;
}
default: default:
sidiv_result = (int32_t)ppc_result_a / (int32_t)ppc_result_b; sidiv_result = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
ppc_result_d = sidiv_result; 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(); ppc_store_result_regd();
} }
} }
@ -998,17 +1012,23 @@ void ppc_divwodot() {
ppc_state.ppc_cr |= 0x30000000; ppc_state.ppc_cr |= 0x30000000;
return; return;
case 0xFFFFFFFF: case 0xFFFFFFFF:
if (ppc_result_a == 0x80000000) { if (ppc_result_a == 0x80000000UL) {
ppc_state.ppc_spr[SPR::XER] |= 0xC0000000; ppc_state.ppc_spr[SPR::XER] |= 0xC0000000;
ppc_state.ppc_cr |= 0x90000000; ppc_state.ppc_cr |= 0x90000000;
ppc_result_d = 0xFFFFFFFF; ppc_result_d = 0xFFFFFFFF;
ppc_store_result_regd(); ppc_store_result_regd();
return; return;
} }
else if (ppc_result_a == 0x7FFFFFFFUL) {
ppc_result_d = 0x80000001;
ppc_state.ppc_cr |= 0x80000000;
ppc_store_result_regd();
return;
}
default: default:
sidiv_result = (int32_t)ppc_result_a / (int32_t)ppc_result_b; sidiv_result = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
ppc_result_d = (uint32_t)sidiv_result; 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_changecrf0(ppc_result_d);
ppc_store_result_regd(); ppc_store_result_regd();
} }
@ -1059,9 +1079,9 @@ void ppc_divwuo() {
ppc_store_result_regd(); ppc_store_result_regd();
return; return;
default: default:
ppc_setsoov(ppc_result_a, ppc_result_b, ppc_result_d);
uidiv_result = ppc_result_a / ppc_result_b; uidiv_result = ppc_result_a / ppc_result_b;
ppc_result_d = uidiv_result; ppc_result_d = uidiv_result;
ppc_setsoov_divwo(ppc_result_a, ppc_result_d);
ppc_store_result_regd(); ppc_store_result_regd();
} }
} }
@ -1078,9 +1098,9 @@ void ppc_divwuodot() {
ppc_state.ppc_cr |= 0x30000000; ppc_state.ppc_cr |= 0x30000000;
return; return;
default: default:
ppc_setsoov(ppc_result_a, ppc_result_b, ppc_result_d);
uidiv_result = ppc_result_a / ppc_result_b; uidiv_result = ppc_result_a / ppc_result_b;
ppc_result_d = uidiv_result; ppc_result_d = uidiv_result;
ppc_setsoov_divwo(ppc_result_a, ppc_result_d);
ppc_changecrf0(ppc_result_d); ppc_changecrf0(ppc_result_d);
ppc_store_result_regd(); ppc_store_result_regd();
} }