Assembly registers in 64-bit architecture

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More Related Contents:

  1. Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
  2. What do the E and R prefixes stand for in the names of Intel 32-bit and 64-bit registers?
  3. Why are rbp and rsp called general purpose registers?
  4. Why is the address of static variables relative to the Instruction Pointer?
  5. What are the names of the new X86_64 processors registers?
  6. x86_64 registers rax/eax/ax/al overwriting full register contents [duplicate]
  7. Why can I access lower dword/word/byte in a register but not higher?
  8. What’s the best way to remember the x86-64 System V arg register order?
  9. Why use RIP-relative addressing in NASM?
  10. What’s the purpose of the LEA instruction?
  11. What considerations go into predicting latency for operations on modern superscalar processors and how can I calculate them by hand?
  12. What are callee and caller saved registers?
  13. Why does the x86-64 / AMD64 System V ABI mandate a 16 byte stack alignment?
  14. Is a sign or zero extension required when adding a 32bit offset to a pointer for the x86-64 ABI?
  15. Printing floating point numbers from x86-64 seems to require %rbp to be saved
  16. MOVZX missing 32 bit register to 64 bit register
  17. CS:APP example uses idivq with two operands?
  18. Why are signed and unsigned multiplication different instructions on x86(-64)?
  19. Why is (or isn’t?) SFENCE + LFENCE equivalent to MFENCE?
  20. Bomb lab phase_4
  21. What’s the size of a QWORD on a 64-bit machine?
  22. Does each PUSH instruction push a multiple of 8 bytes on x64?
  23. Differences between general purpose registers in 8086: [bx] works, [cx] doesn’t?
  24. Can I add 64bit constants to 64bit registers?
  25. How to multiply a register by 37 using only 2 consecutive leal instructions in x86?
  26. What does “rep; nop;” mean in x86 assembly? Is it the same as the “pause” instruction?
  27. x86-64 canonical address?
  28. Why does this code execute more slowly after strength-reducing multiplications to loop-carried additions?
  29. Handling calls to (potentially) far away ahead-of-time compiled functions from JITed code
  30. Assembly x86 registers signed or unsigned

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