4 #define do_div(n,base) ({ \
5 unsigned long __upper, __low, __high, __mod; \
6 asm("":"=a" (__low), "=d" (__high):"A" (n)); \
9 __upper = __high % (base); \
10 __high = __high / (base); \
12 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (base), "0" (__low), "1" (__upper)); \
13 asm("":"=A" (n):"a" (__low),"d" (__high)); \