摘要：主要是下面的代码：register n = (count + 7) / 8; /\* count > 0 assumed \*/ switch (count % 8) { case 0: do { \*to = \*from++; case 7: \*to = \*from++; case 6: \*to = \*from++; case 5: \*to = \*from++; case 4: \*to = \*from++; case 3: \*to = \*from++; case 2: \*to = \*from++; case 1: \*to = \*from++; } whil 阅读全文