Arrays 嵌套for循环、MIPS程序集中的数组
我得到了要在MIPS程序集中实现的以下C代码Arrays 嵌套for循环、MIPS程序集中的数组,arrays,loops,assembly,mips,Arrays,Loops,Assembly,Mips,我得到了要在MIPS程序集中实现的以下C代码 for(i=0; i<16, i++){ for(i=0; j<16, j++){ C[i][j] = A[i][j] = B[j][i] } } 正在加载计数器: addi $t0, $t0, 16 move $t1, $zero move $t2, $zero la $t3, A la $t4, B la $t5, C 和[i][j]的逻辑,使用公式基+字长*(行*最大大小+列): sllv $t6,
for(i=0; i<16, i++){
for(i=0; j<16, j++){
C[i][j] = A[i][j] = B[j][i]
}
}
正在加载计数器:
addi $t0, $t0, 16
move $t1, $zero
move $t2, $zero
la $t3, A
la $t4, B
la $t5, C
和[i][j]的逻辑,使用公式基+字长*(行*最大大小+列):
sllv $t6, $t0, $t1 #Row, shift 16 by current counter -> 32 -> 64..
addu $t6, $t6, $t2 #Column, add column counter.
sll $t6, $t6, 2 #Shift entire count by word length.
addu $t6, $t6, $t3 #Add A base address.
lw $t7, ($t6) #Load word from that address.
完整代码:
addi $t0, $t0, 16
move $t1, $zero
move $t2, $zero
la $t3, A
la $t4, B
la $t5, C
First:
bge $t1, $t0, Exit
Second:
bge $t2, $t0, Continue
###
#Zero out counters first.
move $t6, $zero
move $t7, $zero
move $t8, $zero
move $t9, $zero
sllv $t6, $t0, $t1 #Row, shift 16 by current counter -> 32 -> 64..
addu $t6, $t6, $t2 #Column, add column counter.
sll $t6, $t6, 2 #Shift entire count by word length.
addu $t6, $t6, $t3 #Add A base address.
lw $t7, ($t6) #Load word from that address.
sllv $t7, $t0, $t2 #Row, shift 16 by current counter -> 32 -> 64..
addu $t7, $t7, $t1 #Column, add column counter.
sll $t7, $t7, 2 #Shift entire count by word length.
addu $t7, $t7, $t4 #Add B base address.
lw $t8, ($t7) #Load word from that address.
addu $t9, $t7, $t8 #add A and B results.
addu $t7, $t6, $t5 #add C base address, reuses $t7, copies $t6 from *A* array.
sw $t9, 0($t7) #store above result to C.
###
addi $t2, $t2, 1
j Second
Continue:
addi $t1, $t1, 1
j First
Exit:
我收到一个错误的地址错误,但我似乎无法找出错误所在。至少有三个错误:
- 您正在覆盖
,其偏移量应为A和C,基址为A$t6
- 您正在覆盖
,它应该包含地址为B[j][i]的A[i][j]的内容$t7
- 您计算错了行偏移量。应该将行移动4次(实际上是行乘以16),而不是移动16次
sllv $t6, $t0, $t1 #Row, shift 16 by current counter -> 32 -> 64..
...
addu $t6, $t6, $t3 #Add A base address.
lw $t7, ($t6) #Load word from that address.
...
sllv $t7, $t0, $t2 #Row, shift 16 by current counter -> 32 -> 64..
...
addu $t9, $t7, $t8 #add A and B results
与
嗨,cs2100同学
sllv $t6, $t0, $t1 #Row, shift 16 by current counter -> 32 -> 64..
...
addu $t6, $t6, $t3 #Add A base address.
lw $t7, ($t6) #Load word from that address.
...
sllv $t7, $t0, $t2 #Row, shift 16 by current counter -> 32 -> 64..
...
addu $t9, $t7, $t8 #add A and B results
sll $t6, $t1, 4 # Row
...
addu $t7, $t6, $t3 #Add A base address.
lw $t9, ($t7) #Load word from that address.
...
sll $t7, $t2, 4 # Row
...
addu $t9, $t9, $t8 #add A and B results.