Initial commit of Hyperscan

unit/internal/masked_move.cpp

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2015, Intel Corporation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  * Neither the name of Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include <cstring>
+
+#include "gtest/gtest.h"
+#include "util/masked_move.h"
+
+namespace {
+
+#if defined(__AVX2__)
+
+bool try_mask_len(const u8 *buf, u8 *target, size_t len) {
+    memset(target, 0, 32);
+    memcpy(target, buf, len);
+    m256 mask = masked_move256_len(buf, len);
+    return (0 == memcmp((u8 *)&mask, target, 32));
+}
+
+static const char *alpha = "0123456789abcdefghijklmnopqrstuvwxyz0123456789abcde"
+                           "fghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrst"
+                           "uvwxyz";
+
+TEST(MaskedMove, tymm) {
+    const u8 *buf = (const u8 *)alpha;
+    u8 target[32];
+
+    for (int len = 4; len <= 32; len++) {
+        EXPECT_TRUE(try_mask_len(buf, target, len)) << "len: " << len;
+    }
+}
+
+#endif
+
+} // namespace