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---
tags:
- sorbonne
- informatique
- architecture-des-ordinateurs
- td
semestre: 3
---
Les partiels ne sont pas très bon en général
|> moyenne de 7.1, il y a eu une très bonne note
---
`$31` est géré par le CPU lors d'un `jal`
```asm
.data
nmt: .word 15, -1, 124
.text
# main
# moyenne3(n, m, 5)
lui $8, $0, 0x1001
addiu $29, $29, -16 # pour pouvoir sauvegarder tmp si on ne l'optimise pas
# n
lw $9, 0($8)
sw $9, 0($8)
or $4, $0, $9
# m
lw $9, 4($8)
sw $9, 4($8)
or $5, $0, $9
# 9
ori $9, $0, 5
sw $9, 8($8)
or $6, $0, $9
jal moyenne3
addiu $29, $29, 12
# affichage
or $4, $0, $2
ori $2, $0, 1
syscall
# moyenne3(m, 1, m+5)
lui $8, $0, 0x1001
addiu $29, $29, -12
# m
lw $9, 4($8)
sw $9, 0($8)
or $4, $0, $9
# m
ori $9, $0, 1
sw $9, 4($8)
or $5, $0, $9
# 9
lw $9, 4($8)
addiu $9, $9, 5
sw $9, 8($8)
or $6, $0, $9
jal moyenne3
addiu $29, $29, 12
# affichage
or $4, $0, $2
ori $2, $0, 1
syscall
# exit
addui $29, $29, 4
ori $2, $0, 10
syscall
moyenne3:
addiu $29, $29, -12 # pour $31, $16 et pour la variable optimisée en registre
sw $31, 4($29)
sw $16, 8($29)
# $4 = p; $5 = q; $6 = r
or $16, $0, $0
addu $16, $4, $5
addu $16, $16, $6
ori $9, $0, 3
div $16, 3
mflo $2
lw $31, 4($29)
lw $16, 8($29)
addiu $29, $29, 8
jr $31
```
```asm
.data
nml: .word 15, -1, 124
.text
# main
# moyenne3(n, m, 5)
lui $8, $0, 0x1001
addiu $29, $29, -16 # pour pouvoir sauvegarder tmp si on ne l'optimise pas
# n
lw $9, 0($8)
sw $9, 0($20)
or $4, $0, $9
# m
lw $9, 4($8)
sw $9, 4($20)
or $5, $0, $9
# 9
ori $9, $0, 5
sw $9, 8($20)
or $6, $0, $9
jal moyenne3
addiu $29, $29, 12
# affichage
or $4, $0, $2
ori $2, $0, 1
syscall
# moyenne5(m, 1, m+5, 12, 35)
lui $8, $0, 0x1001
addiu $29, $29, -20
# m
lw $9, 4($8)
sw $9, 0($29)
or $4, $0, $9
# 1
ori $9, $0, 1
sw $9, 4($29)
or $5, $0, $9
# m+5
lw $9, 4($8)
addiu $9, $9, 5
sw $9, 8($29)
or $6, $0, $9
# 12
ori $9, $0, 12
sw $9, 12($29)
or $7, $0, $9
# 35
ori $9, $0, 35
sw $9, 16($29)
# on ne peut pas mettre $9 dans $8 car $8 ne contient pas un paramètre de fonction
jal moyenne5
addiu $29, $29, 20
# affichage
or $4, $0, $2
ori $2, $0, 1
syscall
# exit
addui $29, $29, 4
ori $2, $0, 10
syscall
moyenne3:
addiu $29, $29, -12 # pour $31, $16 et pour la variable optimisée en registre
sw $31, 4($29)
sw $16, 8($29)
# $4 = p; $5 = q; $6 = r
or $16, $0, $0
addu $16, $4, $5
addu $16, $16, $6
ori $9, $0, 3
div $16, 3
mflo $2
lw $31, 4($29)
lw $16, 8($29)
addiu $29, $29, 8
jr $31
moyenne5:
addiu $29, $29, -12 # pour $31, $16 et pour la variable optimisée en registre
sw $31, 4($29)
sw $16, 8($29)
lw $10, 28($29)
addu $16, $4, $5
addu $16, $16, $6
addu $16, $16, $7
addu $16, $16, $10
ori $9, $0, 5
div $16, 5
lw $31, 4($29)
lw $16, 8($29)
jr $31
```
|
