From daa72aba103dafb493dc7416b694b536b86f5026 Mon Sep 17 00:00:00 2001
From: Connor McLaughlin <stenzek@gmail.com>
Date: Wed, 19 Aug 2020 23:38:05 +1000
Subject: [PATCH] CPU: Skip executing nop instructions

Makes PGXP CPU mode quicker, as well as a performance improvement to the
regular interpreter.
---
 src/core/cpu_core.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/core/cpu_core.cpp b/src/core/cpu_core.cpp
index 6e2b8cb34..87057b51d 100644
--- a/src/core/cpu_core.cpp
+++ b/src/core/cpu_core.cpp
@@ -477,6 +477,10 @@ ALWAYS_INLINE_RELEASE static void ExecuteInstruction()
     LogInstruction(inst.bits, g_state.current_instruction_pc, &g_state.regs);
 #endif
 
+  // Skip nops. Makes PGXP-CPU quicker, but also the regular interpreter.
+  if (inst.bits == 0)
+    return;
+
   switch (inst.op)
   {
     case InstructionOp::funct: