iR5900 Recompiler: Emulate exception handler cycles on syscall skip

PCSX2 · Sep 14, 2023 · 8dd866a · 8dd866a
1 parent b36e2eb
commit 8dd866a
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/pcsx2/x86/ix86-32/iR5900.cpp b/pcsx2/x86/ix86-32/iR5900.cpp
@@ -744,7 +744,12 @@ void R5900::Dynarec::OpcodeImpl::recSYSCALL()
 	{
 		// If it's FlushCache or iFlushCache, we can skip it since we don't support cache in the JIT.
 		if (g_cpuConstRegs[3].UC[0] == 0x64 || g_cpuConstRegs[3].UC[0] == 0x68)
+		{
+			// Emulate the amount of cycles it takes for the exception handlers to run
+			// This number was found by using github.com/F0bes/flushcache-cycles
+			s_nBlockCycles += 5650;
 			return;
+		}
 	}
 	recCall(R5900::Interpreter::OpcodeImpl::SYSCALL);
 	g_branch = 2; // Indirect branch with event check.