feat: Initial commit

Laboratorio8/Esercizio5.asm

@@ -0,0 +1,87 @@
+.data
+p: .asciiz "Il numero è palindromo"
+
+.text
+.globl main
+.ent main
+main:
+addiu $sp, $sp, -4
+sw $ra, ($sp)
+
+li $a0, 4
+li $a1, 3
+li $a2, 2
+li $a3, 1
+jal determinante2x2
+
+lw $ra, ($sp)
+jr $ra
+.end main
+
+.ent determinante3x3
+determinante3x3
+# crea frame
+sub $sp, $sp, 4
+sw $fp, ($sp)
+move $fp, $sp
+
+# salva i registri
+sub $sp, $sp, 24
+sw $s0, ($sp)
+sw $s1, 4($sp)
+sw $s2, 8($sp)
+sw $s3, 12($sp)
+sw $s4, 16($sp)
+sw $ra, 20($sp)
+
+move $s0, $a0
+move $s1, $a1
+move $s2, $a2
+move $s3, $a3
+
+# calcolo step 1
+lw $a0, 20($fp)
+lw $a1, 16($fp)
+lw $a2, 8($fp)
+lw $a3, 4($fp)
+jal determinante2x2
+mul $s4, $v0, $s0
+
+# calcolo step 2
+move $a0, $s3
+lw $a1, 16($fp)
+lw $a2, 12($fp)
+lw $a3, 4($fp)
+jal determinante2x2
+mul $t0, $v0, $s1
+addu $s4, $s4, $t0
+
+# calcolo step 3
+move $a0, $s3
+lw $a1, 20($fp)
+lw $a2, 12($fp)
+lw $a3, 8($fp)
+jal determinante2x2
+mul $t0, $v0, $s2
+addu $v0, $s4, $t0
+
+# ripristina i registri
+lw $s0, ($sp)
+lw $s1, 4($sp)
+lw $s2, 8($sp)
+lw $s3, 12($sp)
+lw $s4, 16($sp)
+lw $ra, 20($sp)
+lw $fp, 24($sp)
+addi $sp, $sp, 28
+
+jr $ra
+.end determinante3x3
+
+.ent determinante2x2
+determinante2x2:
+mul $t0, $a0, $a3
+mul $t1, $a1, $a2
+sub $v0, $t0, $t1
+jr $ra
+.end determinante2x2