initial commit

oscar64/autotest/divmod32test.c

@@ -0,0 +1,36 @@
+#include <assert.h>
+
+void check(unsigned long l, unsigned long r)
+{
+	unsigned long d = l / r, m = l % r;
+
+	assert(d * r + m == l);
+	assert(m < r);
+}
+
+int main(void)
+{
+	for(char i=0; i<28; i++)
+	{
+		for(char j=0; j<28; j++)
+		{
+			check(0xb3ul << i, 0x2bul << j);
+			check(0xb3ul << i, 0x01ul << j);
+			check(0x01ul << i, 0xc2ul << j);
+			check(0xb31ful << i, 0x2bul << j);
+			check(0xb354ul << i, 0x01ul << j);
+			check(0xb3ul << i, 0x2b1cul << j);
+			check(0xb3ul << i, 0x013ful << j);
+			check(0xb31ful << i, 0x2b23ul << j);
+			check(0xb354ul << i, 0x0145ul << j);
+			check(0xb31f24ul << i, 0x2bul << j);
+			check(0xb35421ul << i, 0x01ul << j);
+			check(0xb31f24ul << i, 0x2b23ul << j);
+			check(0xb35421ul << i, 0x0145ul << j);
+			check(0xb31f24ul << i, 0x2b2356ul << j);
+			check(0xb35421ul << i, 0x0145a7ul << j);
+		}
+	}
+
+	return 0;
+}