From 1882cf1c9d68e0c325c89f0bdf368b47206f19e0 Mon Sep 17 00:00:00 2001
From: Thiago Macieira <thiago.macieira@intel.com>
Date: Thu, 29 Dec 2011 22:44:16 -0200
Subject: Add detection of AVX and AVX2 support in the compiler.

Intel CC 12.1 supports AVX2 but only with -march=core-avx2. The -mavx2
option produces a warning.

GCC 4.6 does not recognise any option.

GCC 4.7 recognises both -mavx2 and -march=core-avx2 so let's use the
latter for now. We may need to change to -mavx2 when there's an AMD
processor that supports AVX2 too.

Change-Id: I529240e6e6c2c0e3942d357e0320212d954fe4de
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
---
 config.tests/unix/avx2/avx2.cpp | 55 +++++++++++++++++++++++++++++++++++++++++
 config.tests/unix/avx2/avx2.pro |  3 +++
 2 files changed, 58 insertions(+)
 create mode 100644 config.tests/unix/avx2/avx2.cpp
 create mode 100644 config.tests/unix/avx2/avx2.pro

(limited to 'config.tests/unix')

diff --git a/config.tests/unix/avx2/avx2.cpp b/config.tests/unix/avx2/avx2.cpp
new file mode 100644
index 0000000000..9e56531220
--- /dev/null
+++ b/config.tests/unix/avx2/avx2.cpp
@@ -0,0 +1,55 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Intel Corporation.
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the configuration of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <immintrin.h>
+
+int main(int, char**)
+{
+    /* AVX */
+    _mm256_zeroall();
+    volatile __m256i a = _mm256_setzero_si256();
+
+    /* AVX2 */
+    volatile __m256i b = _mm256_and_si256(a, a);
+    volatile __m256i result = _mm256_add_epi8(a, b);
+    (void)result;
+    return 0;
+}
diff --git a/config.tests/unix/avx2/avx2.pro b/config.tests/unix/avx2/avx2.pro
new file mode 100644
index 0000000000..48374f11c4
--- /dev/null
+++ b/config.tests/unix/avx2/avx2.pro
@@ -0,0 +1,3 @@
+SOURCES = avx2.cpp
+CONFIG -= x11 qt
+mac:CONFIG -= app_bundle
-- 
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