instruction code h-search The instruction code 'h-search' is an instruction code of the heads_default and heads_sex instruction sets that will read in the template that follows it, and find the location of a complement template in the code. The BX register will be set to the distance to the complement from the current position of the instruction pointer, and the CX register will be set to the size of the template. The flow-head will also be placed at the beginning of the complement template. If no template follows, both BX and CX will be set to zero, and the flow-head will be placed on the instruction immediatly following the 'h-search' instruction code.