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Diffstat (limited to 'indra/llmath/tests/alignment_test.cpp')
| -rwxr-xr-x | indra/llmath/tests/alignment_test.cpp | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/indra/llmath/tests/alignment_test.cpp b/indra/llmath/tests/alignment_test.cpp new file mode 100755 index 0000000000..8961b9d6d5 --- /dev/null +++ b/indra/llmath/tests/alignment_test.cpp @@ -0,0 +1,120 @@ +/**
+ * @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"
+
+void* operator new(size_t size)
+{
+ return ll_aligned_malloc_16(size);
+}
+
+void operator delete(void *p)
+{
+ ll_aligned_free_16(p);
+}
+
+namespace tut
+{
+
+#define is_aligned(ptr,alignment) ((reinterpret_cast<uintptr_t>(ptr))%(alignment)==0)
+#define is_aligned_relative(ptr,base_ptr,alignment) ((reinterpret_cast<uintptr_t>(ptr)-reinterpret_cast<uintptr_t>(base_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);
+
+
+// Verify that aligned allocators perform as advertised.
+template<> template<>
+void alignment_test_object_t::test<1>()
+{
+ const int num_tests = 7;
+ void *align_ptr;
+ for (int i=0; i<num_tests; i++)
+ {
+ align_ptr = ll_aligned_malloc_16(sizeof(MyVector4a));
+ ensure("ll_aligned_malloc_16 failed", is_aligned(align_ptr,16));
+
+ align_ptr = ll_aligned_realloc_16(align_ptr,2*sizeof(MyVector4a));
+ ensure("ll_aligned_realloc_16 failed", is_aligned(align_ptr,16));
+
+ ll_aligned_free_16(align_ptr);
+
+ align_ptr = ll_aligned_malloc_32(sizeof(MyVector4a));
+ ensure("ll_aligned_malloc_32 failed", is_aligned(align_ptr,32));
+ ll_aligned_free_32(align_ptr);
+ }
+}
+
+// In-place allocation of objects and arrays.
+template<> template<>
+void alignment_test_object_t::test<2>()
+{
+ MyVector4a vec1;
+ ensure("LLAlignment vec1 unaligned", is_aligned(&vec1,16));
+
+ MyVector4a veca[12];
+ ensure("LLAlignment veca unaligned", is_aligned(veca,16));
+}
+
+// Heap allocation of objects and arrays.
+template<> template<>
+void alignment_test_object_t::test<3>()
+{
+ 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];
+ ensure("LLAligment veca base", is_aligned(veca,16));
+ for(int i=0; i<ARR_SIZE; i++)
+ {
+ std::cout << "veca[" << i << "]" << std::endl;
+ ensure("LLAlignment veca member unaligned", is_aligned(&veca[i],16));
+ }
+}
+
+}
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