Merge pull request #19 from thuongtruong1009/version-7

feat: add new code

Lab 7 - Floating Point Arithmetic/lab7_2.s

@@ -0,0 +1,55 @@
+
+#Code by https://github.com/thuongtruong1009
+
+# Evaluate 1/1 + 1/2 + 1/3 + 1/4 +....
+# Register used:
+# $t0: num of terms
+# $t1: counter, init to 1
+# $f2: numberator, always = 1
+# $f4: sum of series
+# $f6: double value of counter
+######################################################
+	  .data
+prompt: .asciiz "Enter number of terms: "
+answer: .asciiz "Value of series is: "
+numerator: .double 1.0
+
+	  .text
+	  .globl main
+main:
+	la $a0, prompt		#answer string    
+	li $v0, 4
+	syscall
+
+	li $v0, 5		  # read int
+	syscall
+
+	move $t0, $v0		  #store num of term in $t0
+
+	li $t1, 1		    #init counter to 1
+	l.d $f2, numerator	  #init numberator to 1
+
+	mtc1.d $zero, $f4	  #init sum to 0
+	cvt.d.w $f4, $f4
+
+loop:
+	mtc1.d $t1, $f6		#store denominator = counter
+	cvt.d.w $f6, $f6
+	div.d $f6, $f2, $f6	    #$f6 = 1.0/counter
+	add.d $f4, $f4, $f6	    #add to sum
+
+continue:
+	addi $t1, $t1, 1	  #update counter
+	blt $t0, $t1, return	  #num of terms < counter -> return
+	j loop			  # else loop back
+
+return:
+	la $a0, answer		  # print answer string
+	li $v0, 4
+	syscall
+
+	mov.d $f12, $f4		#store redult in $f12
+	li $v0, 3		#print result
+	syscall
+
+	jr $ra

Lab 7 - Floating Point Arithmetic/lab7_3.s

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+
+#Code by https://github.com/thuongtruong1009
+
+# $t2: store G code
+# $t3: store B code
+# $t4: store hex char extracted
+# $t5: store input string index
+# $t6: store conditions
+# $t7: store shift bits
+	  .data
+input: .space 8
+max: .float 255.0
+prompt: .asciiz " Enter 6 digits hex code of the color: "
+answer: .asciiz " color in code in fraction is:\n"
+error: .asciiz " error, invalid input!"
+R: .asciiz "R:"
+G: .asciiz "\nG:"
+B: .asciiz "\nB:"	
+
+	  .text		
+	  .globl main
+main:
+	#const f0 = 255
+	#lw $t0, color
+	l.s $f0, max		
+
+	la $a0,prompt		#prompt input
+	li $v0,4
+	syscall
+
+	li $a1,8   		#read hex input string
+	la $a0,input
+	li $v0,8
+	syscall
+
+	#RRGGBB= 6 digits hex*4 bits/1digits =24 bits/1digits
+	move $t5,$zero 		# init counter
+	li $t7, 20     		# init shift bit
+	move $t0,$zero		#int $t0 to store color code
+
+loop:
+	lb $t4,input($t5)	#read char
+	beqz $t4,convert   	# null-> start convert
+
+	li $t6, 0x61 		#char "A"->"Z"
+	bge $t4,$t6, charLowerCase 
+	li $t6, 0x41 		#char" a" to "f"
+	bge $t4,$t6, charUpperCase
+	li $t6,0x30
+	bge $t4,$t6, digit
+	li $t6,0x39
+	ble $t4,$t6, digit
+	li $t6, 0x46 
+	ble $t4,$t6, charUpperCase
+	li $t6, 0x66 		#"B"
+	ble $t4,$t6, charLowerCase
+
+exception:
+	la $a0,error 		# print error message
+	li $v0,4
+	syscall
+
+	jr $ra
+digit: 
+	addi $t4,$t4, -48
+	j continue
+
+charUpperCase:
+	addi $t4,$t4,-55
+	j continue
+
+charLowerCase:
+	addi $t4,$t4,-87
+	j continue
+
+continue:
+	sllv $t4,$t4,$t7 	#shift digit left by value in $t7
+	or $t0,$t0,$t4   	#place the shifted bits in $t0
+	addi $t5,$t5,1		#update counter
+	addi $t7,$t7,-4		#update shift bits
+	j loop			#loop back
+
+convert:
+	and $t0,$t0,0x00FFFFFF    #remove 2 first char in hex code
+
+	and $t1,$t0,0x00FF0000		#t1=0x00RR0000
+	srl $t1,$t1,16    		#RR 000000RR
+
+	and $t2,$t0,0x0000FF00
+	srl $t2,$t2,8 			#GG
+
+	and $t3,$t0,0x000000FF 		#BB
+
+	la $a0,answer 			# answer print 
+	li $v0,4
+	syscall
+
+	la $a0,R		#R:
+	li $v0,4
+	syscall
+
+	mtc1 $t1,$f12		  #actual converting for R
+	cvt.s.w $f12,$f12	  #RR/255.0 = 45/255.0
+	div.s $f12,$f12,$f0
+
+	li $v0,2
+	syscall
+
+	la $a0,G		#G:
+	li $v0,4
+	syscall
+
+	mtc1 $t2,$f12
+	cvt.s.w $f12,$f12	#actual converting for B
+	div.s $f12,$f12,$f0	#G/255
+
+	li $v0,2
+	syscall
+
+	la $a0,B		#B:
+	li $v0,4
+	syscall
+
+	mtc1 $t3,$f12
+	cvt.s.w $f12,$f12	  #actual converting for B
+	div.s $f12,$f12,$f0	  #B/255
+
+	li $v0,2
+	syscall
+
+	jr    $ra