Isolated emscripten in new lib

lib/emscripten/emtests/test_simd10.c

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2016 The Emscripten Authors.  All rights reserved.
+ * Emscripten is available under two separate licenses, the MIT license and the
+ * University of Illinois/NCSA Open Source License.  Both these licenses can be
+ * found in the LICENSE file.
+ */
+
+#include <xmmintrin.h>
+#include <stdio.h>
+#include <string>
+
+std::string tostr(__m128 m)
+{
+    unsigned int u[4];
+    _mm_store_ps((float*)u, m);
+    char str[256];
+    sprintf(str, "[%X,%X,%X,%X]", u[3], u[2], u[1], u[0]);
+    return str;
+}
+
+int main()
+{
+    unsigned int u[4] = { 0xFFFFFFFFU, 0xFFFFFFFFU, 0xFFFFFFFFU, 0xFFFFFFFFU };
+    __m128 m1 = _mm_load_ps((float*)&u);
+    printf("%s\n", tostr(m1).c_str());
+}