unless (defined &__x86_64__) { sub __x86_64__() { 1 } }

##</code><code>##

unless (defined &__amd64__) { sub __amd64__() { 1 } }

##</code><code>##

 if(defined(&__x86_64__)) {
        require 'asm-x86_64/unistd.ph';
    } else {
        require 'asm-i386/unistd.ph';
    }