How to read and write x86 flags registers directly?

Question

From what I\'ve read, seems like there are 9 different flags. Is it possible to read/change them directly? I know I can know for example if the zero flag is set after doing

Answer 1

Simplest way is using pushf/popf.

If you want to move eflags into eax, use code below.

pushf                  # push eflags into stack
pop %eax               # pop it into %eax