1 files changed, 45 insertions, 0 deletions
diff --git a/test/test.c b/test/test.c
new file mode 100644
index 0000000..bdc11fc
--- /dev/null
+++ b/test/test.c
@@ -0,0 +1,45 @@
+#include <stdio.h>
+#include <stdint.h>
+
+// typedef uint32_t SF;
+// const int ush=24,ssh=31;
+typedef uint16_t SF;
+const int ush=11,ssh=15;
+
+SF mul(SF a,SF b){
+	SF sg=1;
+	if(a>=(1<<ssh)){a=-a; sg*=-1;}
+	if(b>=(1<<ssh)){b=-b; sg*=-1;}
+	return sg*(SF)(((uint64_t)a*(uint64_t)b)>>ush);
+}
+
+SF mk(int i){
+	return i<<ush;
+}
+
+float flt(SF a){
+	float sg=1;
+	if(a>=(1<<ssh)){a=-a; sg*=-1;}
+	return (float)a/(float)(1<<ush)*sg;
+}
+
+int main(void){
+	const SF L=mk(-2),R=mk(1);
+	const SF T=mk(1),B=-(mk(1));
+	for(SF y=T;y!=B-(mk(1)>>4);y-=mk(1)>>4){
+		for(SF x=L;x!=R;x+=mk(1)>>5){
+			int n=0;
+			SF a=x,b=y,a2=mul(a,a),b2=mul(b,b);
+			while(n<26&&a2+b2<mk(4)){
+				b=mul(mk(2),mul(a,b))+y;
+				a=a2-b2+x;
+				a2=mul(a,a);
+				b2=mul(b,b);
+				n++;
+			}
+			if(n==26)putchar(' ');
+			else putchar('A'+n);
+		}
+		putchar('\n');
+	}
+}