SH-2789 WIP - tests for alignment

indra/llmath/CMakeLists.txt

@@ -117,6 +117,7 @@ if (LL_TESTS)
   # INTEGRATION TESTS
   set(test_libs llmath llcommon ${LLCOMMON_LIBRARIES} ${WINDOWS_LIBRARIES})
   # TODO: Some of these need refactoring to be proper Unit tests rather than Integration tests.
+  LL_ADD_INTEGRATION_TEST(alignment "" "${test_libs}")
   LL_ADD_INTEGRATION_TEST(llbbox llbbox.cpp "${test_libs}")
   LL_ADD_INTEGRATION_TEST(llquaternion llquaternion.cpp "${test_libs}")
   LL_ADD_INTEGRATION_TEST(mathmisc "" "${test_libs}")

indra/llmath/tests/alignment_test.cpp

@@ -0,0 +1,127 @@
+/**
+ * @file v3dmath_test.cpp
+ * @author Vir
+ * @date 2011-12
+ * @brief v3dmath test cases.
+ *
+ * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+// Tests related to allocating objects with alignment constraints, particularly for SSE support.
+
+#include "linden_common.h"
+#include "../test/lltut.h"
+#include "../llmath.h"
+#include "../llsimdmath.h"
+#include "../llvector4a.h"
+
+namespace tut
+{
+
+#define is_aligned(ptr,alignment) ((reinterpret_cast<uintptr_t>(ptr))%(alignment)==0)
+
+struct alignment_test {};
+
+typedef test_group<alignment_test> alignment_test_t;
+typedef alignment_test_t::object alignment_test_object_t;
+tut::alignment_test_t tut_alignment_test("LLAlignment");
+
+LL_ALIGN_PREFIX(16)
+class MyVector4a
+{
+	LLQuad mQ;
+} LL_ALIGN_POSTFIX(16);
+
+LL_ALIGN_PREFIX(64)
+class MyBigBlob
+{
+public:
+	~MyBigBlob() {}
+private:
+	LLQuad mQ[4];
+} LL_ALIGN_POSTFIX(64);
+
+// In-place allocation of objects and arrays.
+template<> template<>
+void alignment_test_object_t::test<1>()
+{
+	ensure("LLAlignment reality is broken: ", (1==1));
+
+	MyVector4a vec1;
+	ensure("LLAlignment vec1 unaligned", is_aligned(&vec1,16));
+	
+	MyBigBlob bb1;
+	ensure("LLAlignment bb1 unaligned", is_aligned(&bb1,64));
+		   
+
+	MyVector4a veca[12];
+	ensure("LLAlignment veca unaligned", is_aligned(veca,16));
+
+	MyBigBlob bba[12];
+	ensure("LLAlignment bba unaligned", is_aligned(bba,64));
+}
+
+// Heap allocation of objects and arrays.
+template<> template<>
+void alignment_test_object_t::test<2>()
+{
+	const int ARR_SIZE = 7;
+	for(int i=0; i<ARR_SIZE; i++)
+	{
+		MyVector4a *vecp = new MyVector4a;
+		ensure("LLAlignment vecp unaligned", is_aligned(vecp,16));
+		delete vecp;
+	}
+
+	MyVector4a *veca = new MyVector4a[ARR_SIZE];
+	for(int i=0; i<ARR_SIZE; i++)
+	{
+		ensure("LLAlignment veca unaligned", is_aligned(&veca[i],16));
+	}
+
+	for(int i=0; i<ARR_SIZE; i++)
+	{
+		void *aligned_addr = _aligned_malloc(sizeof(MyBigBlob),64);
+		MyBigBlob *bbp = new(aligned_addr) MyBigBlob;
+		ensure("LLAlignment bbp unaligned", is_aligned(bbp,64));
+		bbp->~MyBigBlob();
+		_aligned_free(aligned_addr);
+	}
+
+	ensure("LLAlignment big blob size",sizeof(MyBigBlob)==64);
+	void *aligned_addr = _aligned_malloc(ARR_SIZE*sizeof(MyBigBlob),64);
+	MyBigBlob *bba = new(aligned_addr) MyBigBlob[ARR_SIZE];
+	std::cout << "aligned_addr " << aligned_addr << std::endl;
+	std::cout << "bba " << bba << std::endl;
+	for(int i=0; i<ARR_SIZE; i++)
+	{
+		std::cout << "bba test " << i << std::endl;
+		ensure("LLAlignment bba unaligned", is_aligned(&bba[i],64));
+	}
+	for(int i=0; i<ARR_SIZE; i++)
+	{
+		bba[i].~MyBigBlob();
+	}
+	_aligned_free(aligned_addr);
+}
+
+}