RISCV - 1 RV32/64G指令集清单

**RISC-V 指令集清单**

RISC-V 是一种开源的、自由的 CPU 构架，旨在成为一种通用的计算机指令集。它由 University of California, Berkeley 的 David Patterson 和 his team 开发。RISC-V 的目标是提供一个高性能、低功耗和易于实现的 CPU 构架。

**RV32/64G 指令集清单**

RV32/64G 是 RISC-V 的一部分，指的是32 位或64 位的通用指令集。下面是 RV32/64G 指令集清单：

### **整数运算**

* `add`: 加法

riscv add x1, x2, x3 # x1 = x2 + x3 

* `sub`: 减法

riscv sub x1, x2, x3 # x1 = x2 - x3 

* `mul`: 乘法

riscv mul x1, x2, x3 # x1 = x2 * x3 

* `div`:除法

riscv div x1, x2, x3 # x1 = x2 / x3 

* `rem`: 取余数

riscv rem x1, x2, x3 # x1 = x2 % x3 

### **移位运算**

* `sll`: 左移位

riscv sll x1, x2,3 # x1 = x2 << 3 

* `srl`: 右移位

riscv srl x1, x2,3 # x1 = x2 >>3 

* `sra`: 有符号右移位

riscv sra x1, x2,3 # x1 = x2 >>>3 

### **比较运算**

* `slt`: 小于

riscv slt x1, x2, x3 # x1 = (x2 < x3) ?1 :0 

* `sltu`: 无符号小于

riscv sltu x1, x2, x3 # x1 = (x2 < x3) ?1 :0 

* `sgt`: 大于

riscv sgt x1, x2, x3 # x1 = (x2 > x3) ?1 :0 

* `sgtu`: 无符号大于

riscv sgtu x1, x2, x3 # x1 = (x2 > x3) ?1 :0 

### **逻辑运算**

* `and`: 与

riscv and x1, x2, x3 # x1 = x2 & x3 

* `or`: 或

riscv or x1, x2, x3 # x1 = x2 | x3 

* `xor`: 异或

riscv xor x1, x2, x3 # x1 = x2 ^ x3 

### **控制流**

* `beq`: 等于

riscv beq x1, x2,10 # if (x1 == x2) goto10 

* `bne`: 不等于

riscv bne x1, x2,10 # if (x1 != x2) goto10 

* `blt`: 小于

riscv blt x1, x2,10 # if (x1 < x2) goto10 

* `bge`: 大于等于

riscv bge x1, x2,10 # if (x1 >= x2) goto10 

### **跳转**

* `j**: 直接跳转到指定地址

riscv j10 # goto10 

* `jr`: 返回到上一个函数的返回地址

riscv jr ra # return to the previous function's return address 

### **系统调用**

* `ecall`: 系统调用

riscv ecall # system call 

* `ebreak**: 中断系统调用

riscv ebreak # interrupt system call 

### **异常处理**

* `mret**: 从中断返回到用户模式

riscv mret # return from interrupt to user mode 

* `msr`: 写入异常状态寄存器

riscv msr x1, x2 # write to exception state register 

### **内存管理**

* `lw**:读取字节

riscv lw x1,0(x2) # load byte from memory 

* `sw**: 写入字节

riscv sw x1,0(x2) # store byte to memory 

### **内存访问**

* `ld`: 加载字

riscv ld x1,0(x2) # load word from memory 

* `sd**: 存储字

riscv sd x1,0(x2) # store word to memory 

### **内存访问**

* `ldl`: 加载长整数

riscv ldl x1,0(x2) # load long integer from memory 

* `sdl**: 存储长整数

riscv sdl x1,0(x2) # store long integer to memory 

### **内存访问**

* `ldq`: 加载双字

riscv ldq x1,0(x2) # load double word from memory 

* `sq**: 存储双字

riscv sq x1,0(x2) # store double word to memory 

### **内存访问**

* `ldd`: 加载四字

riscv ldd x1,0(x2) # load quad word from memory 

* `sdd**: 存储四字

riscv sdd x1,0(x2) # store quad word to memory 

### **内存访问**

* `ldi`: 加载指针

riscv ldi x1,0(x2) # load pointer from memory 

* `sti**: 存储指针

riscv sti x1,0(x2) # store pointer to memory 

### **内存访问**

* `ldp`: 加载双指针

riscv ldp x1, x2,0(x3) # load double pointer from memory 

* `sdp**: 存储双指针

riscv sdp x1, x2,0(x3) # store double pointer to memory 

### **内存访问**

* `ldq`: 加载四指针

riscv ldq x1, x2, x3,0(x4) # load quad pointer from memory 

* `sq**: 存储四指针

riscv sq x1, x2, x3,0(x4) # store quad pointer to memory 

### **内存访问**

* `ldi`: 加载双字指针

riscv ldi x1, x2,0(x3) # load double word pointer from memory 

* `sti**: 存储双字指针

riscv sti x1, x2,0(x3) # store double word pointer to memory 

### **内存访问**

* `ldd`: 加载四字指针

riscv ldd x1, x2, x3,0(x4) # load quad word pointer from memory 

* `sdd**: 存储四字指针

riscv sdd x1, x2, x3,0(x4) # store quad word pointer to memory