#define spin_lock_string \ "\n1:\t" \ "lock ; decb %0\n\t" \ "jns 3f\n" \ "2:\t" \ "rep;nop\n\t" \ "cmpb $0,%0\n\t" \ "jle 2b\n\t" \ "jmp 1b\n" \ "3:\n\t"
2010/8/20 Parmenides <mobile.parmeni...@gmail.com>: > Hi, > > In the following code, the nop instruction prefixed by rep will > execute several times. How many times the instruction executes is > controlled by ecx register. But, there is no explicit setting of ecx > register. What's the meaning of this instruction? > -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecar...@nl.linux.org Please read the FAQ at http://kernelnewbies.org/FAQ
