目录

• 1.验证逻辑指令
• 2.验证移位指令

1.验证逻辑指令

inst_rom.S

	.org 0x0
	.global _start
	.set noat
_start:
   lui  $1,0x0101
   ori  $1,$1,0x0101
   ori  $2,$1,0x1100        # $2 = $1 | 0x1100 = 0x01011101
   or   $1,$1,$2            # $1 = $1 | $2 = 0x01011101
   andi $3,$1,0x00fe        # $3 = $1 & 0x00fe = 0x00000000
   and  $1,$3,$1            # $1 = $3 & $1 = 0x00000000
   xori $4,$1,0xff00        # $4 = $1 ^ 0xff00 = 0x0000ff00
   xor  $1,$4,$1            # $1 = $4 ^ $1 = 0x0000ff00
   nor  $1,$4,$1            # $1 = $4 ~^ $1 = 0xffff00ff   nor is "not or"

将上面的文件放到共享文件夹里，然后直接make all得到inst_rom.data

然后将inst_rom.data放到testbench的文件夹内，进行仿真
结果如下可看见写入到寄存器的时候数据是没问题的，所以验证成功

2.验证移位指令

   .org 0x0
   .set noat
   .global _start
_start:
   lui   $2,0x0404
   ori   $2,$2,0x0404
   ori   $7,$0,0x7
   ori   $5,$0,0x5
   ori   $8,$0,0x8
   sync
   sll   $2,$2,8    # $2 = 0x40404040 sll 8  = 0x04040400
   sllv  $2,$2,$7   # $2 = 0x04040400 sll 7  = 0x02020000
   srl   $2,$2,8    # $2 = 0x02020000 srl 8  = 0x00020200
   srlv  $2,$2,$5   # $2 = 0x00020200 srl 5  = 0x00001010
   nop
   sll   $2,$2,19   # $2 = 0x00001010 sll 19 = 0x80800000
   ssnop
   sra   $2,$2,16   # $2 = 0x80800000 sra 16 = 0xffff8080
   srav  $2,$2,$8   # $2 = 0xffff8080 sra 8  = 0xffffff80 

同样进行操作如上即可
得到inst_rom.data进行仿真
可以看到每一个寄存器在对应写入的位置和写入的数值都是正确的，但是目前对于最后两条指令sra,srav可能还存在问题，还在改进

标签：sll,sra,rom,day6,----,start,inst,ori,移位指令
来源： https://blog.csdn.net/qq_37858023/article/details/117718481