我完成了MARS Java应用程序中的MIPS中的项目编码。它运行完美，但是现在当我在将要测试的计算机上运行它时，它们的编译器与我使用的编译器略有不同。。。哎呀，我解决了大多数问题，但是现在我遇到了对齐错误。
错误：
Error #16: Attempt to use nonexistent memory
Fault address: 004001b4
Register contents:
$zero: 00000000 $at: 00000004 $v0: 00000004 $v1: 00000000
$a0: 100001d8 $a1: 00000000 $a2: 00000000 $a3: 00000000
$t0: 00000006 $t1: 00000000 $t2: 10000280 $t3: 00000000
$t4: 100000b7 $t5: 00000020 $t6: 00000000 $t7: 00000001
$s0: 00000000 $s1: 00000001 $s2: 00000004 $s3: 00000006
$s4: 00000029 $s5: 00000000 $s6: 00000000 $s7: 00000000
$t8: 00000006 $t9: 00000000 $k0: 00000000 $k1: 00000000
$gp: 00000000 $sp: 7fffeb48 $fp: 00000000 $ra: 0040005c
pc: 004001b8 hi: 00000000 lo: 000000a8
Current instruction: 8d4e0000 (at 004001b4)
Decoded instruction: lw $t6, 0($t2) (0x10000280)
我的数据部分代码：
# Constants Declaration
X_ASCII_NUM = 88
O_ASCII_NUM = 79
SPACE = 32
DATA_SIZE = 4
NEGATIVE_ONE = -1
PLAYER_ONE_WON = 1
PLAYER_TWO_WON = 2
.data
.align 2
Banner:
.asciiz " ************************\n"
Welcome:
.asciiz " ** Connect Four **\n"
NewLine:
.asciiz "\n"
Columns:
.asciiz " 0 1 2 3 4 5 6\n"
Border:
.asciiz "+-----------------------------+\n"
MiddleRow:
.asciiz "|+---+---+---+---+---+---+---+|\n"
Slots:
.asciiz "|| | | | | | | ||\n"
User1Prompt:
.asciiz "Player 1: select a row to place your coin (0-6 or -1 to quit): "
User2Prompt:
.asciiz "Player 2: select a row to place your coin (0-6 or -1 to quit): "
P1Quit:
.asciiz "Player1 quit.\n"
P2Quit:
.asciiz "Player2 quit.\n"
IllegalMove:
.asciiz "Illegal column number.\n"
OutOfRoom:
.asciiz "Illegal move, no more room in that column.\n"
P1Wins:
.asciiz "Player 1 wins!"
P2Wins:
.asciiz "Player 2 wins!"
DrawString:
.asciiz "The game ends in a tie."
# Creates a 2d-array of 0's
mdArray: .word 0,0,0,0,0,0,0 # row 0
.word 0,0,0,0,0,0,0 # row 1
.word 0,0,0,0,0,0,0 # row 2
.word 0,0,0,0,0,0,0 # row 3
.word 0,0,0,0,0,0,0 # row 4
.word 0,0,0,0,0,0,0 # row 5
# (6X7)
.text
.align 2
# .globl main
其余的代码...最后一行是导致错误的那一行： 顺便说一下，我正在创建一个Connect 4游戏，如果有 您需要更多有关https://www.cs.rit.edu/~csci250/project/185/proj185.html
的信息#################################
# Name: main
# Args: N/A
# Description: This function calls the functions to display the board
# and start the game.
main:
jal printWelcome # displays welcome message
jal printBoard # displays board
##############################
# Name: input
# Args: N/A
# Description:
#
input:
# Infinite loop that takes user input until an error or -1
while:
# Player 1
li $v0, 4
la $a0, User1Prompt
syscall
li $v0, 5 # ask for integer
syscall
# Error checking
la $t0, NEGATIVE_ONE
beq $v0, $t0, P1Quits # Checks to see if P1 quits
bgt $v0, 6, Invalid1 # Checks to see if input > 6
blt $v0, -1, Invalid1 # Checks to see if input < -1
la $a0, mdArray # the address of the array; arg for func
move $a1, $v0 # the valid col; arg for func
jal validPlayer1 # passes all error checks; play move
li $v0, 4
jal printBoard # updates and prints the board
la $a0, mdArray # load the array as an arg for func call
jal checkForWinner # Searches the entire board for a winner
la $t0, PLAYER_ONE_WON # loads a 1
beq $v0, $t0, Player1Won # if a 1 is returned P1 won
la $t0, PLAYER_TWO_WON # loads a 2
beq $v0, $t0, Player2Won # if a 2 is returned P2 won
la $t0, NEGATIVE_ONE
beq $v0, $t0, Draw # if a -1 is returned it was a draw
Player2:
# Player 2
li $v0, 4
la $a0, User2Prompt
syscall
li $v0, 5 # ask for integer
syscall
la $t0, NEGATIVE_ONE
beq $v0, $t0, P2Quits # Checks to see if P2 quits
bgt $v0, 6, Invalid2 # Checks to see if input > 6
blt $v0, -1, Invalid2 # Checks to see if input < -1
la $a0, mdArray # the address of the array; arg for func
move $a1, $v0 # the valid col; arg for func
jal validPlayer2 # passes all error checks; play move
jal printBoard
la $a0, mdArray # load the array as an arg for func call
jal checkForWinner # Searches the entire board for a winner
la $t0, PLAYER_ONE_WON # loads a 1
beq $v0, $t0, Player1Won # if a 1 is returned P1 won
la $t0, PLAYER_TWO_WON # loads a 2
beq $v0, $t0, Player2Won # if a 2 is returned P2 won
la $t0, NEGATIVE_ONE
beq $v0, $t0, Draw # if a -1 is returned it was a draw
j while
Invalid1:
li $v0, 4
la $a0, IllegalMove
syscall
j while
Invalid2:
li $v0, 4
la $a0, IllegalMove
syscall
j Player2
Player1Won:
li $v0, 4
la $a0, P1Wins # print p1 wins
syscall
li $v0, 10 # End the program
syscall
Player2Won:
li $v0, 4
la $a0, P2Wins # print p2 wins
syscall
li $v0, 10 # End the program
syscall
Draw:
li $v0, 4
la $a0, DrawString # print draw
syscall
li $v0, 10 # End the program
syscall
##################################
# Name: checkForWinner
# Args: a0 - The memory address of the array
# Returns: v0 - 1 if (X)player1 won, 2 if (O)player2 won, 0 if no winner
# or will return -1 if the game ends in a tie
# Description: Checks ever spot on the board to see if there are any winners
# or if there is a tie. Checks top right, right, bottom right
# and down for each space on the board
#
checkForWinner:
# Save the return address
addi $sp, $sp, -20
sw $ra, 0($sp)
sw $s1, 4($sp)
sw $s2, 8($sp)
sw $s3, 12($sp)
sw $s4, 16($sp)
# Storing variables for comparison
li $s2, 4
li $s3, 6
li $s4, 41
# Keeping track of the position of the space
li $t0, 0 # row = 0
li $t1, 0 # col = 0
# Temp row and col values used for testing other spaces
li $t8, 0 # tempRow = 0
li $t9, 0 # tempCol = 0
li $s1, 0 # Counter for how many spaces are occupied
whileNotEnd:
# Check to see if were at position (5,6)
beq $t0, $s3, checkCol # if(row = 5)
notend: # place to jump back to if col != 6
# Finding starting value
mul $t2, $t0, 7 # t2 = rowIndex * amount of cols
mflo $t2
add $t2, $t2, $t1 # + colIndex
mul $t2, $t2, DATA_SIZE # * DATA_SIZE
mflo $t2
add $t2, $t2, $a0 # + Base Address
lw $t6, ($t2) # Grab the starting digit
bne $t6, $zero, occupiedSpace # if (val != 0) -> occupiedSpace
beq $t6, $zero, movePosition # check to see if the space is a 0
here: # The label to jump back to
li $t7, 1 # A counter for how many in a row
upDiagnol:
beq $t7, $s2, win # check if 4 in a row
# subtract 1 from the row; Add 1 to the column
blt $t8, 1, rightStraight # if (tempRow < 1) then dont sub 1
bgt $t9, 5, rightStraight # if (tempCol > 5) then dont add 1
#else
addi $t8, $t8, -1 # set the new quardinates
addi $t9, $t9, 1
# Grab the value at the up right position
mul $t2, $t8, 7 # t2 = rowIndex * amount of cols
mflo $t2
add $t2, $t2, $t9 # + colIndex
mul $t2, $t2, DATA_SIZE # * DATA_SIZE
mflo $t2
add $t2, $t2, $a0 # + Base Address
lw $t3, ($t2) # Grabbing the value at the idx
老实说，我真的不知道如何使用.align，但是我可以确定问题出在创建2d数组的地方。