尝试编译时，我的代码出错。有什么问题。
这是我的MIPS代码的错误。代码段如下：
/ home / fac / wrc / bin / rasm -l prime.asm> prime.lst
89 0048 012A582A
循环：slt $ t3，$ t1，$ t2＃if（$ t1 <$ t2）$ t3 = 1
错误：乘以定义的符号
150 00c4 01AE782A
循环：slt $ t7，$ t5，$ t6＃if（$ t2 <$ t3）$ t7 = 1
错误：乘以定义的符号
有2个致命错误 Makefile：20：目标“ prime.obj”的配方失败 make：*** [prime.obj]错误2
该怎么办才能解决此错误
MIPS汇编中的代码：
find_primes:
addi $sp,$sp,-40 # allocate stack frame (on doubleword boundary)
sw $ra, 32($sp) # store the ra & s reg's on the stack
sw $s7, 28($sp)
sw $s6, 24($sp)
sw $s5, 20($sp)
sw $s4, 16($sp)
sw $s3, 12($sp)
sw $s2, 8($sp)
sw $s1, 4($sp)
sw $s0, 0($sp)
# ######################################
# ##### BEGIN STUDENT CODE BLOCK 1 #####
addi $t1, $zero, MIN # Insert minimum value MIN = 3 in register $t1
addi $t2, $zero, MAX # Insert maximum value MAX = 102 in register $t2
Loop: slt $t3, $t1, $t2 # if ($t1 < $t2) $t3 = 1
# else $t3 = 0
beq $t3, $zero, L2 # if ($t3 == $zero) go to L2
jal is_prime
add $t4, $zero, $v0
syscall
bne $t4, $zero, print_number
addi $t1, $t1, 1 # $t1 = $t1 + 1
j Loop # go to the Loop
L2:
# ###### END STUDENT CODE BLOCK 1 ######
# ######################################
is_prime:
addi $sp,$sp,-40 # allocate stackframe (doubleword aligned)
sw $ra, 32($sp) # store the ra & s reg's on the stack
sw $s7, 28($sp)
sw $s6, 24($sp)
sw $s5, 20($sp)
sw $s4, 16($sp)
sw $s3, 12($sp)
sw $s2, 8($sp)
sw $s1, 4($sp)
sw $s0, 0($sp)
# ######################################
# ##### BEGIN STUDENT CODE BLOCK 2 #####
addi $t5, $zero, 2
add $t6, $zero, $a0
Loop: slt $t7, $t5, $t6 # if ($t2 < $t3) $t7 = 1
# else $t7 = 0
beq $t7, $zero, Exit # if ($t7 == $zero) go to Exit
rem $t6, $a0, $t5
beq $t6, $zero, L1 # if ($t7 == $zero) go to L1
addi $t5, $t5, 1 # $t5 = $t5 + 1
j Loop # go to the Loop
L1:
addi $v0, $v0, 0 # The value of $v0 is zero
Exit:
addi $v0, $v0, 1 # The value of $v0 is one
# ###### END STUDENT CODE BLOCK 2 ######
# ######################################