spim-无法打开文件

Question

# comments are delimited by hash marks

.data
silly_str: .asciiz "My first MIPS program\n"

.text 

main:

li $v0, 4               # load the value "4" into register $v0
la $a0, silly_str       # load the address of "silly_str" into register $a0
syscall                 # perform the "print_string" system call ($v0 = 4)
jr $ra                  # return to the calling procedure

以上是我试图在Mac上加载到SPIM的文件。每当我尝试加载它时，都会出现以下错误，并且我不确定是什么错误。

(spim) load "test.s"
Cannot open file: `test.s'
(spim) input in flex scanner failed

在此先感谢您的帮助。