![]() ![]() Please note that we are only given estimated dates and a product's release date does not represent the exact date we will be receiving the products. Dates can often change due to factors that are out of our control such as production delays, shipping delays, backed up shipping ports. Once products are available we will try to ship out your order as soon as possible.Īrrival dates are estimated and may change depending on availability from the manufacturer. If you prefer to ship items separately please place the orders on separate transactions or email us to split your shipments. When will my pre-orders be shipped?All orders containing a pre-order product will be held until ALL products in the order are available to ship. Please use our contact page or email us directly at and provide us with your order number and new shipping address. For standard sized Funko pops we also include complimentary 0.5mm pop protectors for all pre-orders!Īll Pre-Orders are charged at time of purchase.Ĭan I change my shipping address before shipping? By pre-ordering you will be guaranteed the product before it sells out. Orion Lawlor, UAF Computer Science Department.Popular products will often have a limited run and high demand. Pop rax And we can now restore rax afterwards, and safely return 17Īgain, you can save as many registers as you want, but you need to pop them in the opposite order-otherwise you've flipped their values around!ĬS 301 Lecture Note, 2014, Dr. You can save a scratch register by pushing it before calling a function, then popping it afterwards: mov rax,17 say I want to keep this value while calling a function. All the scratch registers, by contrast, are likely to get overwritten by any function you call. One big advantage to saved registers: you can call other functions, and know that the registers values won't change (because they'll be saved). Pop r15 restore main's copy from the stack If you have multiple registers to save and restore, be sure to pop them in the *opposite* order they were pushed: push rbp save old copy of this register Main might be storing something important in rbp, and will complain if you just change it, but as long as you put it back exactly how it was before you return, main is perfectly happy letting you use it! Without the push and pop, main will be annoyed that you messed with its stuff, which in a real program often means a strange and difficult to debug crash. Pop rbp restore main's copy from the stack For example, "rbp" is a preserved register, so you need to save its value before you can use it: push rbp save old copy of this register You can use push and pop to save registers at the start and end of your function. So be careful with your pushes and pops! Saving Registers with Push and Pop If you do not pop *exactly* the same number of times as you push, your program will crash. If the stack was not clean, everything actually works fine except "ret", which jumps to whatever is on the top of the stack. The second "pop" picks up that value, puts it in rcx, leaving the stack clean. So the first "pop" picks up the 23, and puts it in rax, leaving the stack with one value: Everything you push, you MUST pop again at some point afterwards, or your code will crash almost immediately!įor example, this loads 23 into rax, and then 17 into rcx: push 17Īfter the first "push", the stack just has one value:Īfter the second "push", the stack has two values: "pop" retrieves the last value pushed from the stack. ![]() The 64-bit registers are the ones like "rax" or "r8", not the 32-bit registers like "eax" or "r8d".
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