esame lab giugno luglio 2021

Author: samdsk

esame_20210618/contaparole/contaparole.asm

@@ -0,0 +1,31 @@
+.data
+space: .ascii " "
+fine: .asciiz ""
+.text
+.globl conta_parole
+
+
+conta_parole:
+	move $t0 $a0 #salvo indirizzo dell'array
+	
+	lb $t1 space #32
+	lb $t3 fine #carattere fine stringa	
+	lb $t2 0($t0) #primo carattere, cursore
+	
+	addi $v0 $0 1 #contatore
+	
+	#beq $t2 $t3 end #se	
+	#addi $v0 $0 1
+	
+loop:	beq $t2 $t3 end
+	
+	addi $t0 $t0 1	
+	lb $t2 0($t0)
+	
+	beq $t2 $t1 spazio
+	j loop
+spazio: addi $v0 $v0 1
+	j loop
+	
+end:	
+	jr $ra

esame_20210618/contaparole/main.asm

@@ -0,0 +1,14 @@
+.data
+str: .asciiz "Ciao 0 zero?"
+.text
+.globl main
+
+main:
+	la $a0 str
+	
+	jal conta_parole
+	
+	move $s0 $v0
+	
+	li $v0 10
+	syscall

esame_20210618/minmax/main.asm

@@ -0,0 +1,17 @@
+.data
+arr: .word 1 -1 3 10 5 6
+size: .word 6
+.text
+.globl main
+
+main:
+	la $a0 arr #indirizzo dell'array
+	lw $a1 size #dimensione dell'array
+	
+	jal minmax
+	
+	move $s0 $v0
+	move $s1 $v1
+	
+	li $v0 10
+	syscall

esame_20210618/minmax/maxmain.asm

@@ -0,0 +1,32 @@
+.text
+.globl minmax
+
+
+minmax:	move $t0 $a0 #salvo array indirizzo
+	move $t1 $a1 #salvo dim del array
+	
+	lw $t2 0($a0) #min
+	lw $t3 0($a0) #max
+	
+	addi $t1 $t1 -1 
+	
+loop:	beq $t1 $0 end
+	
+	lw $t4 4($t0)
+	
+	bgt $t4 $t3 max
+	blt $t4 $t2 min
+	
+	addi $t0 $t0 4
+	addi $t1 $t1 -1
+	j loop
+	
+max:	move $t3 $t4
+	j loop
+min:	move $t2 $t4
+	j loop
+	
+end:	move $v0 $t2
+	move $v1 $t3
+	
+	 jr $ra 

esame_20210702/multiplo/conta_multipli.asm

@@ -0,0 +1,45 @@
+.text
+.globl conta_multipli
+	
+conta_multipli:
+	move $t0 $fp
+	addi $fp $sp -4
+	sw $t0 0($fp)
+	sw $sp -4($fp)
+	sw $ra -8($fp)
+	sw $s0 -12($fp)
+	add $sp $fp -12
+	
+	move $s1 $a0
+	move $s2 $a1
+	move $t2 $a2 # N
+	li $s0 0
+	#ultima pos del array
+	addi $a2 $a2 -1
+	mul $t3 $a2 4 #4x5
+	add $s1 $s1 $t3
+	add $s2 $s2 $t3
+	
+loop:	blt $a2 $0 exit
+	lw $a0 0($s1)
+	lw $a1 0($s2)
+	
+	addi $s1 $s1 -4
+	addi $s2 $s2 -4
+	
+	jal multiplo	
+	add $s0 $s0 $v0
+	
+	addi $a2 $a2 -1
+	j loop
+	
+exit:	
+	move $v0 $s0
+
+	lw $t0 0($fp)
+	lw $sp -4($fp)
+	lw $ra -8($fp)
+	lw $s0 -12($fp)
+	move $fp $t0
+	
+	jr $ra

esame_20210702/multiplo/main.asm

@@ -0,0 +1,18 @@
+.data
+arr_1: .word 1 9 5 9 5
+arr_2: .word 4 3 3 8 15
+.text
+.globl main
+
+
+main:	
+	la $a0 arr_1
+	la $a1 arr_2
+	li $a2 5
+	
+	jal conta_multipli
+	
+	move $s0 $v0 
+
+	li $v0 10 
+	syscall

esame_20210702/multiplo/multiplo.asm

@@ -0,0 +1,35 @@
+.text
+.globl multiplo
+
+
+multiplo:
+	move $t0 $fp
+	addi $fp $sp -4
+	sw $t0 0($fp)
+	sw $sp -4($fp)
+	sw $ra -8($fp)
+	sw $s0 -12($fp)
+	add $sp $fp -12
+	
+	li $v0 0
+	
+	blt $a0 $a1 gt
+	j job
+
+gt:	move $t7 $a0
+	move $a0 $a1
+	move $a1 $t7
+	
+job:		
+	div $a0 $a1 
+	mfhi $s0
+	bne $s0 $0 exit
+	li $v0 1
+	
+exit:	lw $t0 0($fp)
+	lw $sp -4($fp)
+	lw $ra -8($fp)
+	lw $s0 -12($fp)
+	move $fp $t0
+	
+	jr $ra

esame_20210702/palindroma/main.asm

@@ -0,0 +1,14 @@
+.data
+str: .asciiz "5kayyak5"
+.text
+.globl main
+
+
+main:	la $a0 str
+
+	jal palindroma
+	
+	move $s0 $v0
+	
+	li $v0 10
+	syscall

esame_20210702/palindroma/palindroma.asm

@@ -0,0 +1,55 @@
+.data
+fine: .asciiz ""
+.text
+.globl palindroma
+
+
+palindroma:
+	move $t0 $a0 #salvo indirizzo della stringa
+	
+	lb $t1 fine
+	addi $t2 $0 0 #f posizione fine
+	addi $t3 $0 0 #i posizione iniziale
+	li $v0 0
+	lb $t4 0($t0) #primo carattere
+	
+loop_size:
+	beq $t4 $t1 end_size
+	addi $a0 $a0 1	
+	lb $t4 0($a0)
+	addi $t2 $t2 1
+
+	j loop_size
+end_size:
+	li $t5 2
+	div $t2 $t5 
+	mfhi $t5
+	mflo $t6
+	
+	addi $t6 $t6 1
+	
+	
+	lb $t4 0($t0) #primo carattere
+	
+	move $a0 $t0
+	addi $t2 $t2 -1	
+	add $a0 $a0 $t2 #ultimo carattere
+	
+	lb $t5 0($a0) #ultimo carattere
+	
+loop:	bne $t4 $t5 exit		
+	bgt $t3 $t6 end	
+	addi $t3 $t3 1
+	
+	addi $t0 $t0 1
+	addi $a0 $a0 -1
+	
+	lb $t4 0($t0)
+	lb $t5 0($a0)
+	
+	j loop
+							
+
+end:	li $v0 1									
+
+exit:	jr $ra