From b9c341ebefe5e36f936f18e319b39bf6281602f7 Mon Sep 17 00:00:00 2001
From: Ben Vanik <ben.vanik@gmail.com>
Date: Tue, 16 Jun 2015 17:46:41 -0700
Subject: [PATCH] Yell at the user when they have an unsupported CPU.

---
 src/xenia/cpu/backend/x64/x64_emitter.cc | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/xenia/cpu/backend/x64/x64_emitter.cc b/src/xenia/cpu/backend/x64/x64_emitter.cc
index da7909063..7fdda2718 100644
--- a/src/xenia/cpu/backend/x64/x64_emitter.cc
+++ b/src/xenia/cpu/backend/x64/x64_emitter.cc
@@ -89,8 +89,13 @@ X64Emitter::X64Emitter(X64Backend* backend, XbyakAllocator* allocator)
     feature_flags_ |= cpu_.has(Xbyak::util::Cpu::tF16C) ? kX64EmitF16C : 0;
   }
 
-  // Need movbe.
-  assert_true(cpu_.has(Xbyak::util::Cpu::tMOVBE));
+  if (!cpu_.has(Xbyak::util::Cpu::tAVX) ||
+      !cpu_.has(Xbyak::util::Cpu::tMOVBE)) {
+    XEFATAL(
+        "Your CPU is too old to support Xenia. See the FAQ for system "
+        "requirements at http://xenia.jp");
+    return;
+  }
 }
 
 X64Emitter::~X64Emitter() = default;