Sort boot files (#260)

src/boot_O2/fmodf.c

@@ -0,0 +1,12 @@
+#include "global.h"
+
+f32 fmodf(f32 dividend, f32 divisor) {
+    s32 quotient;
+
+    if (divisor == 0.0f) {
+        return 0.0f;
+    }
+    quotient = dividend / divisor;
+
+    return dividend - quotient * divisor;
+}