Assembly

Hey /prog/, I am learning Pentium Assembly on linux, using nasm assembler. I've been having trouble with the stack operations. Could somebody explain how I can simply push 4 integers(hex/dec) onto the stack, and then later pop them off? I get some really weird messages when I try to do this.

Thanks a lot.

Setting a register to zero by xoring it with itself has been slower since probably the Pentium Pro. Similarly, swapping the values of two registers is faster using an additional temporary register, even if you have to save its value on the stack.