Add two signed integers, given in stdin(space separated) in i386 ASM Linux ABI
You are asking for a code review, and my first bit of feedback is: COMMENTS.  

Please, reading raw assembler is a challenge.  Start by a comment block at the top that describes the purpose of the code, then consider line-by-line comments, something like this: https://codereview.stackexchange.com/a/156947/110050