这是C中的代码
Void mm ( double a[][]), double b[][], double c[][])
{
int i, j, k;
for (i=0; i! = 3; i = i+1){
for (j = 0; j! = 3; j = j+1){
d[i][j] = a[i][j] ;
for (k = 0; k! = 3; k = k+1){
d[i][j] = d[i][j] + b[i][k] * c[k][j];
}
}
}
}
还要记住，我必须读取数组 a、b、c 的数据，然后打印数组 d，这是我的汇编代码
.data
arrA: .space 72
arrB: .space 72
arrC: .space 72
arrD: .space 72
bracA: .asciiz "a("
bracB: .asciiz "b("
bracC: .asciiz "c("
bracD: .asciiz "d("
comma: .asciiz ","
endBrac: .asciiz ")= "
nextLine: .asciiz "\n"
.text
.globl main
main:
addi $sp, $sp, -32 #Make space of stack
sw $ra, 20($sp) #Store $ra
la $a1, arrA #load base of Array a
la $a2, arrB #load base of Array b
la $a3, arrC #load base of Array c
la $t7, arrD #load base of Array d
li $s0, 1 #set i
li $s1, 1 #set j
li $s2, 1 #set k
li $s7, 1 #counter
loopi:
slti $t0, $s0, 4 #Check i<4
beq $t0, $zero, nextArr #If i=4 go nextArr
loopj:
slti $t0, $s1, 4 #Check j<4
beq $t0, $zero, nextRow #If i=4 go nextRow
slti $t1, $s7, 4 #Check counter
beq $t1, $zero, contB #if counter >=4 go to contB
li $v0, 4 #Prepare for print string
la $a0, bracA #Load adress of string "a("
syscall
j cont
contB:
slti $t1, $s7, 7
beq $t1, $zero, contC #if counter>=7 go to contC
li $v0, 4
la $a0, bracB
syscall
j cont
contC:
slti $t1, $s7, 10
beq $t1, $zero, calcD
li $v0, 4
la $a0, bracC
syscall
cont:
li $v0, 1 #prepare to print integer
move $a0, $s0 #print i
syscall
li $v0, 4
la $a0, comma
syscall
li $v0, 1
move $a0, $s1 #print j
syscall
li $v0, 4
la $a0, endBrac
syscall
sll $t0, $s0, 1 #t0=2*i
add $t0, $t0, $s0 #t0=3*i
add $t0, $t0, $s1 #t0=3*i +j
sll $t0, $t0, 3 #t0=(3*i +j)*8 create double precision
slti $t1, $s7, 4
beq $t1, $zero, useA2
add $t0, $t0, $a1 #a1=base address of a array
j contLi
useA2:
slti $t1, $s7, 7
beq $t1, $zero, useA3
add $t0, $t0, $a2 #a2=base address of a array
j contLi
useA3:
add $t0, $t0, $a3 #a3=base address of a array
contLi:
li $v0, 7
syscall
s.d $f0, 0($t0) #store $t0 to $f0 as floating point
l.d $f12, 0($t0)
li $v0, 3 #get ready to print double
syscall
addi $s1, $s1, 1 #increase j
li $v0, 4
la $a0, nextLine
syscall
j loopj
nextRow:
addi $s7, $s7, 1 #increase counter
addi $s0, $s0, 1 #increase i
li $s1, 1 #set j=1
j loopi
nextArr:
li $s0, 1 #set i=1
li $s1, 1 #set j=1
j loopi
calcD:
li $s0, 1 #set i,j,k=1 for calculations
li $s1, 1
li $s2, 1
li $t0, 0
li $t1, 0
li $t2, 0
li $t3, 0
outLoop:
slti $t0, $s0, 4 #Loop that count i
beq $t0, $zero, printRes
inLoop1:
slti $t0, $s1, 4 #loop that count j
beq $t0, $zero, finInLoop1
sll $t0, $s0, 1 #t0=2*i
add $t0, $t0, $s0 #t0=3*i
add $t0, $t0, $s1 #t0=3*i +j
sll $t0, $t0, 3 #t0=(3*i +j)*8 (double precision)
add $t0, $t0, $a1 #a1=base address of a array
sll $t1, $s0, 1 #t3=2*i
add $t1, $t1, $s0 #t3=3*i
add $t1, $t1, $s1 #t3=3*i +j
sll $t1, $t1, 3 #t3=(3*i +j)*8 for double precision
add $t1, $t1, $t7 #t4=base address of d array
mtc1 $zero,$f0 #f8=sum to be stored in d[i][j](initial value before k loops=0)
cvt.d.w $f0, $f0
mov.d $f8, $f0
l.d $f2, 0($t0) #Load $t0 to $f2
inLoop2:
slti $t4, $s2, 4 #Loop that count k
beq $t4, $zero, finInLoop2
sll $t2, $s0, 1 #t1=2*i
add $t2, $t2, $s0 #t1=3*i
add $t2, $t2, $s2 #t1=3*i +k
sll $t2, $t2, 3 #t1=(3*i +k)*8 (double precision)
add $t2, $t2, $a2 #a2=base address of b array
sll $t3, $s2, 1 #t2=2*k
add $t3, $t3, $s2 #t2=3*k
add $t3, $t3, $s1 #t2=3*k +j
sll $t3, $t3, 3 #t2=(3*k +j)*8 for double precision
add $t3, $t3, $a3 #a3=base address of c array
#So far, t0=address of a[i][j], t1=address of b[i][k], t2=address of c[k][j] and t3=address of d[i][j]
l.d $f4, 0($t2) #Load $t2 to $f4
l.d $f6, 0($t3) #Load $t3 to $f6
mul.d $f10, $f4, $f6
add.d $f8, $f8, $f10
addi $s2, $s2, 1
j inLoop2
finInLoop2:
add.d $f8, $f8, $f2
s.d $f8, 0($t1)#store total sum in d[i][j]
addi $s1, $s1, 1
li $s2, 1 #k=1 to start loop for next j
add.d $f8, $f8, $f0
j inLoop1
finInLoop1:
addi $s0, $s0, 1
li $s1, 1# j=1 to start loop for next i
j outLoop
printRes:
li $s0, 1 #initial value of i=1
li $s1, 1 #initial value of j=1
li $s2, 1 #initial value of k=1
printLoop1:
slti $t0, $s0, 4
beq $t0, $zero, Exit
slti $t0, $s1, 4
beq $t0, $zero, printLoop2
li $v0, 4
la $a0, nextLine
syscall
li $v0, 4
la $a0, bracD
syscall
li $v0, 1
move $a0, $s0
syscall
li $v0, 4
la $a0, comma
syscall
li $v0, 1
move $a0, $s1
syscall
li $v0, 4
la $a0, endBrac
syscall
sll $t0, $s0, 1 #t0=2*i
add $t0, $t0 $s0 #t0=3*i
add $t0, $t0, $s1 #t0=3*i +j
sll $t0, $t0, 3 #t0=(3*i +j)*8 (double precision)
add $t0, $t0, $t7 #t4=base address of d array
l.d $f12, 0($t0)
li $v0, 3 #get ready to print double
syscall
addi $s1, $s1, 1
j printLoop1
printLoop2:
addi $s0, $s0, 1
li $s1, 1
j printLoop1
Exit:
jr $ra
当我读取数据时，程序会立即打印出我所写的内容，但最终不会打印 d 数组 我是 mips 汇编的初学者，所以我的代码可能存在一些重大问题，但我找不到它们...