Mips汇编辅导 | CSC 311 Fall 2019

这个Milestone是实现执行代码生成，接受程序输入并生成MIPS汇编代码

CSC 311 Fall 2019
Milestone #4

Instructions

Submit your completed work using Blackboard before the deadline.

Submit the Byacc/J file and screenshots of the final output running in the simulator.

Project Description and Requirements

The goal of this milestone is to perform code generation, taking a program input and generating MIPS assembly code.

Start the milestone by first downloading the files provided for Milestone 4.

Semi-functional code is provided for you to give you a good starting point.

The requirement for this milestone is to take the any valid input program (such as the example shown on Page 2), and generate the corresponding assembly code (example shown on Page3). Below are the guidelines.

Then the HashMap should have <Key,Value> as <x, $t0>

Grading Criteria

Input Program:

PROGRAM example;

INT x = 1;

INT y = 3;

INT i = x + y;

PRINT (i)

BEGIN

   STRING s = “and”;

   PRINT (s)

   BEGIN

      FLOAT a = 1.1;

      FLOAT b = 2.2;

      FLOAT f = a + b;

      PRINT (f)

   END

END

.

Output Assembly:

.data ## Data declaration section

x: .word 1 # store value in word

y: .word 3 # store value in word

.text ## Assembly language instructions go in text segment

main: ## Start of code section

lw $t0, x   # load contents of RAM location into $t8:  $t8 = x

lw $t1, y   # load contents of RAM location into $t9:  $t9 = y

add $t2, $t1, $t0  # add

li $v0, 1  # load code into register $v0; 1 == print int

move $a0, $t2 # move integer to be printed into $a0:  $a0 = $t2

syscall   # call operating system to perform operation

.data    ## String to be printed:

out_string: .asciiz “and”

.text

li $v0, 4 # system call code for printing string = 4

la $a0, out_string # load address of string to be printed into $a0

syscall # call operating system to perform operation

.data

fp1: .float 1.1

fp2: .float 2.2

.text

l.s $f0, fp1

l.s $f2, fp2  # the arguments to double precision instructions must be even-numbered registers.

add.s $f4, $f0, $f2  # add

li $v0, 2  # load code into register $v0; 1 == print int

mov.s $f12, $f4 # move int to be printed into $a0:  $a0 = $t2

syscall   # call operating system to perform operation

li $v0, 10 # terminate program

syscall  # call operating system to perform operation