我正在使用 QtSpim 9.9.1 编写我的计算机体系结构课程作业我在使用 div.s 运算符时出现语法错误，但在使用 div 时没问题。尝试从用户获取浮点数时会出现另一个错误，但在获取整数时也会消失。这是我的代码：
.text
main:
# Print "This program solves an equation of style a*x + c = 0, print out the result on console."
la $a0, hello_msg # load the address of hello_msg into $a0.
li $v0, 4 # 4 is the print_string syscall.
syscall # do the syscall.
# Print "Enter (a) value please :"
la $a0, enter_a_msg # load the address of enter_a_msg into $a0.
li $v0, 4 # 4 is the print_string syscall.
syscall # do the syscall.
## Get (a) from user, put into $t0.
li $v0, 6 # load syscall read_float into $v0.
syscall # make the syscall.
move $t0, $f0 # move the number read into $t0.////////here got error//////
# Print "Enter (c) value please :"
la $a0, enter_c_msg # load the address of enter_c_msg into $a0.
li $v0, 4 # 4 is the print_string syscall.
syscall # do the syscall.
## Get (c) from user, put into $t1.
li $v0, 6 # load syscall read_float into $v0.
syscall # make the syscall.
move $t1, $f0 # move the number read into $t1.///////also here
# Compute (x), put into $t2.
neg $t3, $t1 # get -c into $t3.
div.s $t2, $t3, $t0 # get x = -c / a into $t2.//// also here Error
# Print "Value of (x) is :"
la $a0, result_msg # load the address of result_msg into $a0.
li $v0, 4 # 4 is the print_string syscall.
syscall # do the syscall.
# Print (x) value .
move $a0, $t2 # move (x) value into $a0.
li $v0, 1 # load syscall print_int into $v0.
syscall # make the syscall.
li $v0, 10 # 10 is the exit syscall.
syscall # do the syscall.
# Data for the program:
.data
hello_msg: .asciiz "This program solves an equation of style a*x + c = 0,\nprints out the result on console.\n"
enter_a_msg: .asciiz "Enter (a) value please :"
enter_c_msg: .asciiz "Enter (c) value please :"
result_msg: .asciiz "Value of (x) is :"
# end Equation.asm