代码

#define N 100000000
#define D 256
#define D1 255
#define cal(w,w2,tw,op)\
p=w2-1;\
for(i=0;i<D;++i)rs[i]=p,p+=tw[i];\
for(i=0;i<N;i+=8){\
	p=w+i;\
	*++rs[p[0]op]=p[0];\
	*++rs[p[1]op]=p[1];\
	*++rs[p[2]op]=p[2];\
	*++rs[p[3]op]=p[3];\
	*++rs[p[4]op]=p[4];\
	*++rs[p[5]op]=p[5];\
	*++rs[p[6]op]=p[6];\
	*++rs[p[7]op]=p[7];\
}
unsigned b[N],*rs[D],t0[D],t1[D],t2[D],t3[D];
void sort(unsigned *a, int n){
unsigned*p,i,x;
  asm (
    "L141: lodsl\n movzbl %%al, %%edx\n movzbl %%ah, %%edi\n incl %[t0](,%%edx,4)\n incl %[t1](,%%edi,4)\n"
    "shrl $16,%%eax\n  movzbl %%al, %%edx\n movzbl %%ah, %%edi\n incl %[t2](,%%edx,4)\n incl %[t3](,%%edi,4)\n"
    "addl $-1, %%ecx\n jne L141": :
    "S"(a),[t0]"m"(t0),[t1]"m"(t1),[t2]"m"(t2),[t3]"m"(t3),"c"(100000000):
    "memory","eax","edx","edi"
  );
cal(a,b,t0,&D1);
cal(b,a,t1,>>8&D1);
cal(a,b,t2,>>16&D1);
cal(b,a,t3,>>24);
}

评测结果