[CPU] Use reserved form of sc for imports.

2020-02-11 06:05:21 -06:00
parent e2346ee539
commit cc47704a6b
2 changed files with 16 additions and 7 deletions
--- a/src/xenia/cpu/ppc/ppc_emit_control.cc
+++ b/src/xenia/cpu/ppc/ppc_emit_control.cc
@@ -423,8 +423,15 @@ int InstrEmit_mcrf(PPCHIRBuilder& f, const InstrData& i) {
 // System linkage (A-24)

 int InstrEmit_sc(PPCHIRBuilder& f, const InstrData& i) {
-  f.CallExtern(f.function());
-  return 0;
+  // Game code should only ever use LEV=0.
+  // LEV=2 is to signify 'call import' from Xenia.
+  // TODO(gibbed): syscalls!
+  if (i.SC.LEV == 2) {
+    f.CallExtern(f.function());
+    return 0;
+  }
+  XEINSTRNOTIMPLEMENTED();
+  return 1;
 }

 // Trap (A-25)