6 ms·push $1/pop %eax (6a 01 58) is shorter, but perhaps not the best idea.by gsg 9y agopush $1/pop %eax (6a 01 58) is shorter, but perhaps not the best idea.nayuki 9y agoActually, there is no 32-bit pop instruction in x86-64 mode. Your code won't work.gsg 9y agoYou're right: it should be pushq $1/pop %rax (which is also three bytes, although there will be a prefix byte for registers r8 through r15).