added lec14

section01/Lec14/bottles.asm

+####################################################
+#Author:	Dean Liu
+#Contact: 	deanliu@cs.ucsb.edu
+#		deanliu@umail.ucsb.edu
+#Date:		May 1st,2005
+#Description:	MIPS Assembly version of
+#               99 bottles 
+#		of beer on the wall
+####################################################
+	.data			#data portion
+strng:	.asciiz	" bottles of beer on the wall, "
+strng2:	.asciiz	" bottles of beer "
+strng3: .asciiz "\ntake one down and pass it around, "
+strng4: .asciiz " bottle of beer on the wall "
+strng5: .asciiz " bottle of beer "
+strng6: .asciiz " bottles of beer on the wall.\n "
+one:	.word	1	
+	.text			#code section
+main:				#main
+	li	$a2, 1		#
+	li	$a3, 99		#start with 99 
+loop:	jal	PRNTB		#prnt bottle count
+	la	$a0, strng	#print strng
+	li	$v0, 4		#
+	syscall			#
+	jal	PRNTB		#
+	la	$a0, strng2	#print strng2
+	li	$v0, 4		#
+	syscall			#
+	la	$a0, strng3	#print strng3
+	li	$v0, 4		#
+	syscall			#
+	sub	$a3, $a3, 1	#subtract one 
+	jal	PRNTB		#
+	la	$a0, strng6	#print strng6
+	li	$v0, 4		#
+	syscall			#
+	bne	$a3, $a2, skip	#handles one 
+                                #bottle on wall
+	jal	ONEBOT		#
+skip:	bnez	$a3, loop	#Loop if not equal
+                                #to 0
+	li	$v0, 10		#exit
+	syscall			#
+####################################################
+# Routine:	PRINTB($a0)
+# Description:	Prints out current bottle count
+####################################################
+PRNTB:	move	$a0, $a3	#prnt bottle count
+	li	$v0, 1		#
+	syscall			#
+	jr	$ra		#return from method
+####################################################
+# Routine:	ONEBOT($a0)
+# Description:	Handles one bottle count.
+####################################################
+ONEBOT: addi	$sp,$sp,-4	#allocate
+	sw	$ra,0($sp)	#store rtrn 
+                                #address
+	jal	PRNTB		#
+	la	$a0, strng4	#print strng4
+	li	$v0, 4		#
+	syscall			#
+	jal	PRNTB		#
+	la	$a0, strng5	#print strng5
+	li	$v0, 4		#
+	syscall			#
+	la	$a0, strng3	#print strng3
+	li	$v0, 4		#
+	syscall			#
+	sub	$a3, $a3, 1	#subtract one 
+	jal	PRNTB		#
+	la	$a0, strng6	#print strng6
+	li	$v0, 4		#
+	syscall			#
+	lw	$ra,0($sp)	#load address
+	addi	$sp,$sp,4	#pop
+	jr	$ra		#rtrn from method
+	
\ No newline at end of file

section01/Lec14/factorial.asm

+.data
+	prompt: .asciiz "N = "
+	sep:	.asciiz "\n"
+.text
+main:
+	li $v0, 4
+	la $a0, prompt
+	syscall
+
+	li $v0, 5
+	syscall
+	
+	move $a0, $v0
+	
+	jal fact
+	move $s0, $v0
+	
+	li $v0, 4
+	la $a0, sep
+	syscall
+
+	li $v0, 1
+	move $a0, $s0
+	syscall
+		
+	li $v0, 10
+	syscall
+			
+	
+fact:	
+	addi $sp, $sp, -8
+	sw $ra, 4($sp)
+	sw $a0, 0($sp)
+
+	beq $a0, 0, fact_1
+	addi $a0, $a0, -1
+	jal fact
+	
+	#restore my ra and a0 values from the stack
+	lw $ra, 4($sp)
+	lw $a0, 0($sp)
+	addi $sp, $sp, 8
+	
+	mul $v0, $a0, $v0
+	jr $ra
+			
+fact_1:
+	li $v0, 1
+	
+	addi $sp, $sp, 8
+	jr $ra
+	

section01/Lec14/fibonacci.asm

+.data
+	prompt: .asciiz "How many? "
+	sep:	.asciiz ", "
+.text
+main:
+	li $v0, 4
+	la $a0, prompt
+	syscall
+
+	li $v0, 5
+	syscall
+	move $s0, $v0		# store input in $s0
+	
+loop:		
+	move $a0, $s0
+	addi $s0, $s0, -1
+	jal fib
+	
+	li $v0, 1
+	move $a0, $t0 
+	syscall
+
+	beq $s0, 0, exit
+	li $v0, 4
+	la $a0, sep
+	syscall
+			
+	j loop
+	
+exit:	
+	li $v0, 10
+	syscall
+	
+	
+fib:	
+	beq $a0, 0, exit0
+	beq $a0, 1, exit1
+	
+	addi $a0, $a0, -1
+	jal fib
+	move $v0, $t0
+	
+	addi $a0, $a0, -1
+	jal fib
+	
+	add $v0, $v0, $t0
+	jr $ra
+	
+	
+exit1:
+	li $v0, 1
+	jr $ra
+exit0:		
+	li $v0, 0
+	jr $ra
\ No newline at end of file

section01/Lec14/fibonacci_start.asm

+.data
+	prompt: .asciiz "How many? "
+	sep:	.asciiz ", "
+.text
+main:
+	li $v0, 4
+	la $a0, prompt
+	syscall
+
+	li $v0, 5
+	syscall
+	move $s0, $v0		# store input in $s0
+	
+loop:		
+	move $a0, $s0
+	addi $s0, $s0, -1
+	jal fib
+	
+	li $v0, 1
+	move $a0, $t0 
+	syscall
+
+	beq $s0, 0, exit
+	li $v0, 4
+	la $a0, sep
+	syscall
+			
+	j loop
+	
+exit:	
+	li $v0, 10
+	syscall
+	
+	
+fib:	
+	li $v0, 0
+	jr $ra
\ No newline at end of file

section01/Lec14/jal-example1.asm

+
+.data
+prompt: .asciiz "Enter temp in F: "
+result: .asciiz "In C that is: "
+.text
+
+main:
+	li $v0, 4
+	la $a0, prompt
+	syscall
+
+	li $v0, 5
+	syscall
+	move $a0, $v0
+	
+	jal f_to_c
+	move $t0, $v0
+	
+	li $v0, 4
+	la $a0, result
+	syscall
+	
+	li $v0, 1
+	move $a0, $t0 
+	syscall
+	
+exit:
+	li $v0, 10
+	syscall
+	
+	
+f_to_c:
+	addi $a0, $a0, -32
+	mul  $a0, $a0, 5
+	div  $v0, $a0, 9
+	jr   $ra