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Spin Operation

  • x86 platform: Use pause or rep;nop for spin operation.
    define SPIN() __asm__ __volatile__("pause")
define SPIN() __asm__ __volatile__(" rep; nop \n");
  • AArch64: You can use nop to implement similar operations.
    define __nops(n)       ".rept" n"\nnop\n.endr\n"
define SPIN(n)         asm volatile(__nops(n))