From: "Mike K." <linux_linux_2003@hotmail.com>
To: linux-mips@linux-mips.org
Subject: __asm__ C code in mips-Linux
Date: Wed, 02 Apr 2003 17:02:08 -0800 [thread overview]
Message-ID: <BAY2-F148jSQU0d0uub000985dc@hotmail.com> (raw)
extern __inline__ void atomic_add(int i, atomic_t * v)
{
unsigned long temp;
__asm__ __volatile__(
"1: ll %0, %1 # atomic_add\n"
" addu %0, %2 \n"
" sc %0, %1 \n"
" beqz %0, 1b \n"
: "=&r" (temp), "=m" (v->counter)
: "Ir" (i), "m" (v->counter));
}
Beginner questions on the above code:
1. what is %0 %1 %2?
2. what is the details meaning of the last two line of the above code?
3. Very thanksful if you can comment each line with detail description for
me, thanks a lot!
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next reply other threads:[~2003-04-03 1:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-03 1:02 Mike K. [this message]
2003-04-03 2:09 ` __asm__ C code in mips-Linux Ralf Baechle
2003-04-03 12:58 ` Kevin D. Kissell
2003-04-03 12:58 ` Kevin D. Kissell
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