public function drop(imgPtr:int, x:int, y:int, stride:int):void
        {
            var tst:FernsTest;
            var ntf:int = numTestsPerFern;
            var img:int = __cint(imgPtr + x + stride * y);
            var index:int = 0;
            var idx_ptr:int = leaves_index;

            tst = tests;

            __cint(__asm(__as3(ntf-6)));
            __asm(LookupSwitch("default", "6", "7", "8", "9", "10", "11", "12"));
            __asm("default:"); // here default will take the min op
            __asm("6:");
                while(tst != null) {
                 index = 0;
                 __beginRepeat(5);
                 {
                    index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                    index <<= 1;
                    tst = tst.next;
                 }
                 __endRepeat();
                 index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                 tst = tst.next;
                 Memory.writeInt(index, idx_ptr);
               idx_ptr = __cint(idx_ptr + 4);
                }
         __asm(Jump("break"));

         __asm("7:");
                while(tst != null) {
                 index = 0;
                 __beginRepeat(6);
                 {
                    index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                    index <<= 1;
                    tst = tst.next;
                 }
                 __endRepeat();
                 index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                 tst = tst.next;
                 Memory.writeInt(index, idx_ptr);
               idx_ptr = __cint(idx_ptr + 4);
                }
         __asm(Jump("break"));

         __asm("8:");
                while(tst != null) {
                 index = 0;
                 __beginRepeat(7);
                 {
                    index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                    index <<= 1;
                    tst = tst.next;
                 }
                 __endRepeat();
                 index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                 tst = tst.next;
                 Memory.writeInt(index, idx_ptr);
               idx_ptr = __cint(idx_ptr + 4);
                }
         __asm(Jump("break"));

         __asm("9:");
                while(tst != null) {
                 index = 0;
                 __beginRepeat(8);
                 {
                    index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                    index <<= 1;
                    tst = tst.next;
                 }
                 __endRepeat();
                 index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                 tst = tst.next;
                 Memory.writeInt(index, idx_ptr);
               idx_ptr = __cint(idx_ptr + 4);
                }
         __asm(Jump("break"));

         __asm("10:");
                while(tst != null) {
                 index = 0;
                 __beginRepeat(9);
                 {
                    index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                    index <<= 1;
                    tst = tst.next;
                 }
                 __endRepeat();
                 index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                 tst = tst.next;
                 Memory.writeInt(index, idx_ptr);
               idx_ptr = __cint(idx_ptr + 4);
                }
         __asm(Jump("break"));

         __asm("11:");
                while(tst != null) {
                 index = 0;
                 __beginRepeat(10);
                 {
                    index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                    index <<= 1;
                    tst = tst.next;
                 }
                 __endRepeat();
                 index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                 tst = tst.next;
                 Memory.writeInt(index, idx_ptr);
               idx_ptr = __cint(idx_ptr + 4);
                }
         __asm(Jump("break"));

         __asm("12:");
                while(tst != null) {
                 index = 0;
                 __beginRepeat(11);
                 {
                    index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                    index <<= 1;
                    tst = tst.next;
                 }
                 __endRepeat();
                 index = __cint( index + int(Memory.readUnsignedByte(img + tst.ind1) < Memory.readUnsignedByte(img + tst.ind2)) );
                 tst = tst.next;
                 Memory.writeInt(index, idx_ptr);
               idx_ptr = __cint(idx_ptr + 4);
                }

         __asm("break:");
          __asm(Nop);
        }