c编译器如何处理无符号和有符号整数？为什么无符号和有符号算术运算的汇编代码是相同的？

I am reading the book: CS-APPe2. C has unsigned and signed int type and in most architectures uses two's-complement arithmetic to implement signed value; but after learning some assembly code, I found that very few instructions distinguish between unsigned and signed. So my question are:I am reading the book: CS-APPe2. C has unsigned