inline assembly interpretation

From: hiren_mehta@agilent.com
Date: Mon Jul 10 2000 - 13:24:17 EST

Is there any document which can help me understand
the following lines of inline assembly code ?

inline void __const_udelay(unsigned long xloops)
{
        int d0;
        __asm__("mull %0"
                :"=d" (xloops), "=&a" (d0)
                :"1" (xloops),"0" (current_cpu_data.loops_per_sec));
        __delay(xloops);
}

void __delay(unsigned long loops)
{
        int d0;
        __asm__ __volatile__(
                "\tjmp 1f\n"
                ".align 16\n"
                "1:\tjmp 2f\n"
                ".align 16\n"
                "2:\tdecl %0\n\tjns 2b"
                :"=&a" (d0)
                :"0" (loops));
}

Thanks
-hiren

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