initial commit

oscar64/autotest/fixmathtest.c

@@ -0,0 +1,90 @@
+#include <fixmath.h>
+#include <assert.h>
+#include <stdlib.h>
+
+unsigned	tval[] = {
+	1, 2, 16, 128, 255, 256, 4096, 32768, 65535
+};
+
+void testmuldiv16u(void)
+{
+	for (char i=0; i<9; i++)
+	{
+		assert(lmuldiv16u(tval[i], 0, tval[i]) == 0);
+		assert(lmuldiv16u(0, tval[i], tval[i]) == 0);
+		for(char j=0; j<9; j++)
+		{			
+			assert(lmuldiv16u(tval[i], tval[j], tval[i]) == tval[j]);
+			assert(lmuldiv16u(tval[j], tval[i], tval[i]) == tval[j]);
+		}
+	}
+
+	for(int i=0; i<10000; i++)
+	{
+		unsigned	a = rand();
+		unsigned	b = rand();
+		unsigned	c = rand();
+		if (c > 0)
+		{
+			unsigned long d = (unsigned long)a * (unsigned long) b / c;
+			if (d < 0x10000l)
+				assert(lmuldiv16u(a, b, c) == d);
+		}
+	}
+}
+
+unsigned	ival[] = {
+	1, 2, 16, 128, 255, 256, 4096, 32767, 
+	-1, -2, -16, -128, -255, -256, -4096, -32767
+};
+
+void testmuldiv16s(void)
+{
+	for (char i=0; i<16; i++)
+	{
+		assert(lmuldiv16s(ival[i], 0, ival[i]) == 0);
+		assert(lmuldiv16s(0, ival[i], ival[i]) == 0);
+		for(char j=0; j<16; j++)
+		{			
+			assert(lmuldiv16s(ival[i], ival[j], ival[i]) == ival[j]);
+			assert(lmuldiv16s(ival[j], ival[i], ival[i]) == ival[j]);
+		}
+	}
+
+	for(int i=0; i<10000; i++)
+	{
+		int	a = rand();
+		int	b = rand();
+		int	c = rand();
+
+		if (c > 0)
+		{
+			long d = (long)a * (long)b / c;
+			if (d >= -32768 && d <= 32767)
+				assert(lmuldiv16s(a, b, c) == d);
+		}
+	}
+
+}
+
+void testlmul4f12s(void)
+{
+	for(int i=0; i<20000; i++)
+	{
+		int	a = rand();
+		int	b = rand();
+
+		long d = ((long)a * (long)b) >> 12;
+		if (d >= -32768 && d <= 32767)
+			assert(lmul4f12s(a, b) == d);
+	}
+}
+
+int main(void)
+{
+	testlmul4f12s();
+	testmuldiv16u();
+	testmuldiv16s();
+
+	return 0;
+}