Function instr_set_raw_word 

pub unsafe extern "C" fn instr_set_raw_word(
    instr: *mut instr_t,
    pos: uint,
    word: uint,
)

Assumes that \p instr’s raw bits are valid and allocated by \p instr and have > pos+3 bytes. Sets the 4 bytes beginning at position \p pos (0-based) to the value word.