initial commit

oscar64/autotest/andmultest.cpp

@@ -0,0 +1,37 @@
+#include <assert.h>
+
+template<int n, int m>
+void checkmul(void)
+{
+	__striped static const unsigned	r[256] = {
+#for(i, 256) i * n,
+	};
+
+	for(unsigned i=0; i<m; i++)
+	{
+		assert((i &  ~0) * n == r[i]);
+		assert((i &  ~1) * n == r[i >> 1] << 1);
+		assert((i &  ~3) * n == r[i >> 2] << 2);
+		assert((i &  ~7) * n == r[i >> 3] << 3);
+		assert((i & ~15) * n == r[i >> 4] << 4);
+	}
+	for(unsigned i=0; i<256; i++)
+	{
+		assert((i &  ~0) * n == r[i]);
+		assert((i &  ~1) * n == r[i >> 1] << 1);
+		assert((i &  ~3) * n == r[i >> 2] << 2);
+		assert((i &  ~7) * n == r[i >> 3] << 3);
+		assert((i & ~15) * n == r[i >> 4] << 4);
+	}
+}
+
+int main(void)
+{
+	checkmul<3, 170>();
+	checkmul<4, 128>();
+	checkmul<5, 204>();
+	checkmul<6, 170>();
+	checkmul<7, 128>();
+	checkmul<8,  64>();
+	checkmul<9, 170>();
+}