From 604f43dfa5adc884acdbbebbdd46dcc74cddaca9 Mon Sep 17 00:00:00 2001
From: Leonardo Chieppe <chieppe2142@gmail.com>
Date: Wed, 29 Apr 2020 14:01:59 -0300
Subject: [PATCH] Potenciacao feita

funcao exponencial feita e adicao de verificadores pros inputs de multiplicacao e divisao
---
 main.asm | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/main.asm b/main.asm
index 9b877fe..532499e 100644
--- a/main.asm
+++ b/main.asm
@@ -33,6 +33,7 @@ op_10:	.asciiz "10 - fibonacci\n"
 op_0:	.asciiz " 0 - quit\n"
 	
 error:	.asciiz "Opcao invalida\n"
+error2: .asciiz "Numero invalido\n"
 
 	.text
 	.globl main
@@ -133,6 +134,15 @@ subtr: #subtrai 2 valores
 	jr $ra
 	
 exec_multi:
+	addi $t8, $zero, 32768
+	ble $t8, $a0, invalid_op2   #a0 maior que 16bit+
+	addi $t8, $zero, -32769
+	bge $t8, $a0, invalid_op2   #a0 menor que 16bits-
+	addi $t8, $zero, 32768
+	ble $t8, $a1, invalid_op2   #a1 maior que 16bit+
+	addi $t8, $zero, -32769
+	bge $t8, $a1, invalid_op2   #a1 menor que 16bits-
+
 	jal multi
 
 	j print_result
@@ -145,6 +155,15 @@ multi: #multiplica 2 valores de 16bits
 
 
 exec_divi:
+	addi $t8, $zero, 32768
+	ble $t8, $a0, invalid_op2   #a0 maior que 16bit+
+	addi $t8, $zero, -32769
+	bge $t8, $a0, invalid_op2   #a0 menor que 16bits-
+	addi $t8, $zero, 32768
+	ble $t8, $a1, invalid_op2   #a1 maior que 16bit+
+	addi $t8, $zero, -32769
+	bge $t8, $a1, invalid_op2   #a1 menor que 16bits-
+
 	jal divi
 
 	j print_result
@@ -156,12 +175,38 @@ divi: #divide 2 valores de 16bits
 	jr $ra
 
 
+exec_expo:
+	add $v0, $a0
+	addi $t0, $zero, 1
+	jal expo_for
+
+	j print_result
+
+expo_for:
+	beq $a1, $zero, expo
+
+	mul $v0, $v0, $a0
+	sub $a1, $a1, $t0
+
+	j expo_for
+
+expo:
+	jr $ra
+
+
 print_result:
 	#impressão do resultado de uma função
 	add $a0, $v0, $zero
 	addi $v0, $zero, 1
 	syscall
 
+invalid_op2:
+	#tratamento de input inválidos
+	la $a0, error2
+	addi $v0, $zero, 4
+	
+	j main
+
 invalid_op:
 	#tratamento de opções inválidas
 	la $a0, error