initial commit

oscar64/autotest/testint16.c

@@ -0,0 +1,121 @@
+#include <assert.h>
+
+void testmuli(int a, int b, int ab)
+{
+	assert (a * b == ab);
+}
+
+void testdivi(int a, int b, int ab)
+{
+	assert (a / b == ab);
+}
+
+void shltesti(int a, int b, int ab)
+{
+	assert (a << b == ab);
+}
+
+void shrtesti(int a, int b, int ab)
+{
+	assert (a >> b == ab);
+}
+
+int sieve(int size)
+{
+	bool	sieve[1000];
+	
+	for(int i=0; i<size; i+=2)
+	{
+		sieve[i] = false;
+		sieve[i+1] = true;
+	}
+	sieve[2] = true;
+	
+	for (int i = 3; i * i < size;)
+	{
+		int j = i * i;
+		while (j < size)
+		{
+			sieve[j] = false;
+			j += 2 * i;
+		}
+		do {i++;} while (i < size && !sieve[i]);
+	}	
+	
+	int	num = 0;
+	for(int i=0; i<size; i++)
+	{
+		if (sieve[i])
+			num++;			
+	}
+	
+	return num;
+}
+
+int main(void)
+{	
+	testmuli(0, 0, 0);
+	testmuli(1, 0, 0);
+	testmuli(0, 1, 0);
+	
+	testmuli( 1,  1,  1);
+	testmuli(-1,  1, -1);
+	testmuli(-1, -1,  1);
+	testmuli( 1, -1, -1);
+	
+	testmuli(5, 5, 25);
+	testmuli( 127,  255, 32385);
+	testmuli(-127,  255, -32385);
+	testmuli( 127, -255, -32385);
+	testmuli(-127, -255, 32385);
+
+	testdivi( 1,  1,  1);
+	testdivi(-1,  1, -1);
+	testdivi( 1, -1, -1);
+	testdivi(-1, -1,  1);
+	
+	testdivi( 11,  4,  2);
+	testdivi(-11,  4, -2);
+	testdivi( 11, -4, -2);
+	testdivi(-11, -4,  2);
+	
+	shltesti( 17, 1, 34);
+	shltesti(-17, 1, -34);
+	shltesti( 1700, 1, 3400);
+	shltesti(-1700, 1, -3400);
+
+	shrtesti( 34, 1, 17);
+	shrtesti(-34, 1, -17);
+	shrtesti( 3400, 1, 1700);
+	shrtesti(-3400, 1, -1700);
+
+	shrtesti( -1, 15, -1);
+	shrtesti(32767, 15, 0);
+	shrtesti( -1, 14, -1);
+	shrtesti(32767, 14, 1);
+
+	shltesti( -1, 14, -16384);
+	shltesti(  1, 14,  16384);
+	
+	assert(sieve(200) == 47);
+	assert(sieve(1000) == 169);
+	
+	int	a = 0, b = 0;
+	for(int i=0; i<1000; i++)
+	{
+		assert( 17 * i == a);
+		assert(-17 * i == b);
+		a += 17;
+		b -= 17;
+	}
+
+	int	c = 0, d = 0;
+	for(int i=0; i<17; i++)
+	{
+		assert( 1000 * i == c);
+		assert(-1000 * i == d);
+		c += 1000;
+		d -= 1000;
+	}
+	return 0;
+}