ppcopcodes: Fix subfic.

2024-01-10 05:38:13 -08:00 · 2024-01-10 05:38:13 -08:00 · 4430fd89a9
parent 7432369162
commit 4430fd89a9
1 changed files with 4 additions and 1 deletions
--- a/cpu/ppc/ppcopcodes.cpp
+++ b/cpu/ppc/ppcopcodes.cpp
@ -331,7 +331,10 @@ void dppc_interpreter::ppc_subfc() {
 void dppc_interpreter::ppc_subfic() {
    ppc_grab_regsdasimm();
    ppc_result_d = simm - ppc_result_a;
-    ppc_carry(~ppc_result_a, ppc_result_d);
+    if (simm == -1)
+        ppc_state.spr[SPR::XER] |= XER::CA;
+    else
+        ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
 }