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ppcopcodes: Fix subfe.

This commit is contained in:
joevt 2023-12-17 16:59:07 -08:00 committed by Maxim Poliakovski
parent 750f91e339
commit 4c49558120
1 changed files with 6 additions and 3 deletions
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9
cpu/ppc/ppcopcodes.cpp
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@ -345,9 +345,12 @@ void dppc_interpreter::ppc_subfic() {
void dppc_interpreter::ppc_subfe() {
ppc_grab_regsdab();
uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
ppc_result_d = ~ppc_result_a + ppc_result_b + grab_xer;
ppc_carry(~ppc_result_a, ppc_result_d);
uint32_t grab_ca = !!(ppc_state.spr[SPR::XER] & XER::CA);
ppc_result_d = ~ppc_result_a + ppc_result_b + grab_ca;
if (grab_ca && ppc_result_b == 0xFFFFFFFFUL)
ppc_state.spr[SPR::XER] |= XER::CA;
else
ppc_carry(~ppc_result_a, ppc_result_d);
if (oe_flag)
ppc_setsoov(ppc_result_b, ppc_result_a, ppc_result_d);