From 4662e632e4f92b335483b91cd1f3576d6d82146f Mon Sep 17 00:00:00 2001
From: Simon Hausmann <simon.hausmann@digia.com>
Date: Fri, 8 Nov 2013 15:27:51 +0100
Subject: For x86 builds, try to detect SSE2 availability early and bail out

...instead of potentially just crashing. This is for the rare case
of somebody trying to run a QML2 based application on a Pentium 3
from before 2001 or older.

Change-Id: Ia5606fe28ef5579654ec939c86830af70dbb84d7
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
---
 src/qml/qml/v8/qv8engine.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/qml/qml/v8/qv8engine.cpp')

diff --git a/src/qml/qml/v8/qv8engine.cpp b/src/qml/qml/v8/qv8engine.cpp
index 14fd74701f..d0fc1b1295 100644
--- a/src/qml/qml/v8/qv8engine.cpp
+++ b/src/qml/qml/v8/qv8engine.cpp
@@ -66,6 +66,7 @@
 #include <QtCore/qjsonobject.h>
 #include <QtCore/qjsonvalue.h>
 #include <QtCore/qdatetime.h>
+#include <private/qsimd_p.h>
 
 #include <private/qv4value_p.h>
 #include <private/qv4dateobject_p.h>
@@ -93,6 +94,12 @@ QV8Engine::QV8Engine(QJSEngine* qq)
     , m_xmlHttpRequestData(0)
     , m_listModelData(0)
 {
+#ifdef Q_PROCESSOR_X86_32
+    if (!(qCpuFeatures() & SSE2)) {
+        qFatal("This program requires an X86 processor that supports SSE2 extension, at least a Pentium 4 or newer");
+    }
+#endif
+
     QML_MEMORY_SCOPE_STRING("QV8Engine::QV8Engine");
     qMetaTypeId<QJSValue>();
     qMetaTypeId<QList<int> >();
-- 
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