find . -type f | while read file; do file "$file" 2>/dev/null | grep -q "Intel 80386" && echo "$file"; done | \
        while read executable; do objdump --no-show-raw-insn -d "$executable" 2>/dev/null | \
                egrep '\ *[0-f]:'| cut -d: -f2 | as -32 -march="i486+mmx+8087+387+287" -mtune=i486 2>&1| \
                        grep -vi CMPXCHG8B | grep  -q "not supported on" && echo "$executable has non i486+ instructions"; done