uni

commit ebb00d7482cf828ed8bd122c2afc07b0fe901831
parent 7a5653aded5380a4b75c94b7140d30d3a9eaaae6
Author: Christos Margiolis <christos@margiolis.net>
Date:   Thu, 26 Nov 2020 19:47:11 +0200

new assignment: lab3

Diffstat:
A
mips-architecture/lab3_ex1.asm
 | 
54
++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
mips-architecture/lab3_ex2.asm
 | 
51
+++++++++++++++++++++++++++++++++++++++++++++++++++

2 files changed, 105 insertions(+), 0 deletions(-)
diff --git a/mips-architecture/lab3_ex1.asm b/mips-architecture/lab3_ex1.asm
@@ -0,0 +1,54 @@
+.data
+        str1: .asciiz "Hello\n"
+        str2: .asciiz "TEI\n"
+        name: .space 64
+        
+.text
+.globl main
+
+main:
+        # 1. print a character
+        li      $v0, 11
+        la      $a0, 'C'
+        syscall
+        
+        # 2. print characters 'a' and 'd'
+        li      $a0, 'a'
+        syscall
+        li      $a0, 'd'
+        syscall
+        
+        # 3. print 'Hello'
+        li      $v0, 4
+        la      $a0, str1
+        syscall
+        
+        # 4. print 'Hello' and 'TEI'
+        la      $a0, str1
+        syscall
+        la      $a0, str2
+        syscall
+        
+        # 5. print 5
+        li      $v0, 1
+        li      $a0, 5
+        syscall
+        
+        # 6. read a word and print it
+        li      $v0, 5
+        syscall
+        move    $t0, $v0
+        li      $v0, 1
+        la      $a0, 0($t0)
+        syscall
+        
+        # 7. read name, store in mem and print it
+        li      $v0, 8
+        la      $a0, name
+        li      $a1, 64
+        syscall
+        li      $v0, 4
+        syscall
+        
+        li      $v0, 10
+        syscall
diff --git a/mips-architecture/lab3_ex2.asm b/mips-architecture/lab3_ex2.asm
@@ -0,0 +1,51 @@
+.data
+        str1: .ascii "hello"
+        str2: .space 64
+        x: .word 0
+        a: .word 20
+        b: .word 30
+        c: .word 15
+
+.text
+.globl main
+
+main:
+        # 1. print 1st and 2nd character in string
+        li      $v0, 11
+        lb      $a0, str1
+        syscall
+        lb      $a0, str1 + 1
+        syscall
+        
+        # 2. read x and print str[x]
+        li      $v0, 5
+        syscall
+        lb      $a0, str1 + 0($v0)
+        li      $v0, 11
+        syscall
+        
+        # 3. read a string and print its 2nd char
+        li      $v0, 8
+        la      $a0, str2
+        la      $a1, 64
+        syscall
+        lb      $a0, str2 + 1
+        li      $v0, 11
+        syscall
+        
+        # 4. int x, a = 20, b = 30, c = 15;
+        #    x = (a + b) - (c + 10);
+        lw      $t0, x
+        lw      $t1, a
+        lw      $t2, b
+        lw      $t3, c
+        add     $t4, $t1, $t2
+        addi    $t5, $t3, 10
+        sub     $t0, $t4, $t5
+        
+        li      $v0, 1
+        la      $a0, 0($t0)
+        syscall  
+        
+        li $v0, 10
+        syscall