1
00:00:00,770 --> 00:00:05,870
Hello, my name is Typhoon and in this lecture you will learn about the jump if less or equal.

2
00:00:05,900 --> 00:00:14,030
So jump if less or equal j l e is a conditional jump instruction in assembly language programming that

3
00:00:14,060 --> 00:00:18,320
directs the flow of execution based on a comparison condition.

4
00:00:18,410 --> 00:00:25,400
This instruction is commonly used to make decisions within programs by evaluating whether one value

5
00:00:25,400 --> 00:00:28,790
is less than or equal to another value.

6
00:00:28,820 --> 00:00:34,910
It's particularly relevant in scenarios where signed integer comparison is involved.

7
00:00:34,940 --> 00:00:41,330
So the first stage here, the instruction follows this general process.

8
00:00:41,390 --> 00:00:43,070
The comparison.

9
00:00:43,190 --> 00:00:48,760
The instruction begins by performing a comparison between two values.

10
00:00:48,770 --> 00:00:55,220
So these values would be stored in registers, memory locations or immediate values.

11
00:00:55,940 --> 00:00:57,440
The instruction itself.

12
00:00:59,000 --> 00:01:00,650
The second is conditional check.

13
00:01:00,680 --> 00:01:07,420
The result of the comparison is then used to determine whether the jump should occur in the case of

14
00:01:08,150 --> 00:01:10,880
the jump will take place if either of two.

15
00:01:11,990 --> 00:01:12,320
Matt.

16
00:01:13,630 --> 00:01:20,830
So the first is the first condition is the zero flag is there.

17
00:01:20,890 --> 00:01:24,040
Zero flag is set to one.

18
00:01:24,460 --> 00:01:36,880
This indicating that the values are equal or the sign flag is F sign flag and the and overflow flag.

19
00:01:37,560 --> 00:01:46,850
Like have have the same value, so indicating that the result is negative or equal.

20
00:01:46,860 --> 00:01:47,670
So.

21
00:01:50,510 --> 00:01:51,320
Equal.

22
00:01:52,560 --> 00:01:53,490
And.

23
00:01:58,400 --> 00:02:00,920
There are negative.

24
00:02:01,570 --> 00:02:05,080
And or negative or equal.

25
00:02:07,590 --> 00:02:15,300
And the last is if either of the conditions mentioned above is satisfied, the program's execution flow

26
00:02:15,300 --> 00:02:22,260
is altered and it jumps to a new location specified by a label or memory address.

27
00:02:22,290 --> 00:02:29,910
If the conditions are not met, the program continues executing the subsequent instruction sequentially

28
00:02:29,910 --> 00:02:33,360
without any alteration to its flow.

29
00:02:33,780 --> 00:02:38,640
Now we will, as we always do in this section, we will write another code.

30
00:02:39,030 --> 00:02:40,980
Uh, considering.

31
00:02:41,750 --> 00:02:42,340
This.

32
00:02:42,440 --> 00:02:48,890
Um, and we will build project something like jump if less or we will use this, uh, jelly here.

33
00:02:49,160 --> 00:02:50,480
So now.

34
00:02:51,310 --> 00:02:53,860
Let's get started with this here.

35
00:02:58,090 --> 00:03:01,390
Of course, as we always do, we will.

36
00:03:01,540 --> 00:03:02,500
Uh, firstly.

37
00:03:04,450 --> 00:03:09,070
So let's in this lecture, let's actually write our.

38
00:03:11,310 --> 00:03:13,410
Port with using.

39
00:03:13,410 --> 00:03:19,350
Yeah, we can also use this print f so we make it more functional in this lecture.

40
00:03:20,040 --> 00:03:23,730
But it might take a long time, but you will understand it better.

41
00:03:26,670 --> 00:03:30,810
Or instead of writing print f uh, which is not required at all.

42
00:03:30,810 --> 00:03:35,070
Uh, the in this lecture you will learn the logic and.

43
00:03:36,040 --> 00:03:39,190
Usage of this jar and indents.

44
00:03:39,190 --> 00:03:47,230
In next sections, we will develop our programs according to the, according to this, uh, logical

45
00:03:47,230 --> 00:03:49,060
conditions here and now.

46
00:03:49,060 --> 00:03:50,740
We will as always do.

47
00:03:51,310 --> 00:03:54,100
Uh, we will firstly define the section data.

48
00:03:54,340 --> 00:04:02,380
Uh, here in this data we will allocate memory for value one and initialize it with 15 value.

49
00:04:03,090 --> 00:04:06,480
Value of one DB and 15.

50
00:04:06,480 --> 00:04:12,990
And again, we will allocate memory for value two and initialize it to 15 again.

51
00:04:12,990 --> 00:04:18,680
And here we will create a section text Global Start.

52
00:04:18,680 --> 00:04:22,860
This is the starting point for our program and in start here.

53
00:04:24,060 --> 00:04:24,480
Art.

54
00:04:24,860 --> 00:04:25,500
We will.

55
00:04:26,340 --> 00:04:28,200
Move, Al.

56
00:04:29,850 --> 00:04:31,980
Uh, to value one.

57
00:04:34,990 --> 00:04:35,950
So we are moved.

58
00:04:36,250 --> 00:04:43,750
We are moving the value at memory address value one into the Al and we are doing the same for BL here.

59
00:04:43,750 --> 00:04:49,360
So we are moving the value at memory address value two into the BL.

60
00:04:51,610 --> 00:05:01,810
And here we are going to compare the result, compare the values in L and b, L, cmp, L and b, l.

61
00:05:02,860 --> 00:05:05,050
And we will use the jump if less.

62
00:05:05,050 --> 00:05:07,100
Or equal jelly.

63
00:05:08,380 --> 00:05:12,430
Uh, less or equal equal here.

64
00:05:12,430 --> 00:05:24,010
So here we will jump to less or equal if l is less than or equal to equal to b l, And here we will

65
00:05:24,010 --> 00:05:29,020
write note we will first create a note less or.

66
00:05:29,850 --> 00:05:31,320
Equal here.

67
00:05:31,350 --> 00:05:33,540
So your code.

68
00:05:34,170 --> 00:05:45,510
Here for the case when value one is not less than or equal to value two here.

69
00:05:45,510 --> 00:05:46,050
Right?

70
00:05:46,050 --> 00:05:56,880
So value two and we are going to jump to done done to conclude this section and we will also develop

71
00:05:56,910 --> 00:05:57,690
done here.

72
00:05:57,690 --> 00:05:59,850
Jump JMP done.

73
00:06:00,570 --> 00:06:01,470
And.

74
00:06:02,190 --> 00:06:05,970
We will create a less or equal.

75
00:06:07,290 --> 00:06:18,960
So your code here for for the case when value one is less than or equal actually.

76
00:06:21,320 --> 00:06:21,680
So.

77
00:06:24,190 --> 00:06:29,260
Is not less and here is less than or equal to value.

78
00:06:29,260 --> 00:06:34,690
One value one or value value two.

79
00:06:34,930 --> 00:06:41,530
Let's make this not uppercase to make sure shown yes less than or equal to.

80
00:06:41,530 --> 00:06:44,560
And we will create our exit code.

81
00:06:47,710 --> 00:06:51,130
And this is your exit code here.

82
00:06:51,130 --> 00:06:58,810
And in this session, we are about to embark on an in-depth journey through the assembly code here.

83
00:06:58,810 --> 00:07:00,010
And our.

84
00:07:01,010 --> 00:07:06,620
Goal is to meticulously analyze each line and unravel the logic behind the conditional branching and

85
00:07:06,620 --> 00:07:07,640
comparisons.

86
00:07:07,700 --> 00:07:11,030
So let's begin this and here.

87
00:07:12,000 --> 00:07:18,540
Our journey commences with the declaration of the data section where, um, we allocate memory to store

88
00:07:18,540 --> 00:07:21,660
two variables value one and value two.

89
00:07:21,660 --> 00:07:24,500
Both variables are initialized to 15.

90
00:07:24,510 --> 00:07:30,390
So setting the stage for our comparison again and transitioning to the text section where executable

91
00:07:30,390 --> 00:07:36,990
instructions reside, the Start label serves as our global entry point, as I always say.

92
00:07:37,410 --> 00:07:41,100
Um, and we start by employing this move again.

93
00:07:41,850 --> 00:07:48,450
Uh, move instruction to load the value residing in memory at the address pointed to by value one into

94
00:07:48,450 --> 00:07:49,800
the al register.

95
00:07:49,800 --> 00:07:56,190
Similarly, move instruction transfers the value from the memory location pointed to value two into

96
00:07:56,190 --> 00:07:57,900
the Belle Register.

97
00:07:57,960 --> 00:08:04,720
Following this instruction undertakes a comparison between the value stored in Al and b l.

98
00:08:04,770 --> 00:08:13,480
If the comparison determines that the value in Al is less than or equal to the value in b l, we proceed

99
00:08:13,480 --> 00:08:15,190
to the less.

100
00:08:16,180 --> 00:08:18,310
Or equal labor.

101
00:08:18,520 --> 00:08:24,820
So in scenarios where the comparison result indicates that the value in Al is not less than or equal

102
00:08:24,820 --> 00:08:31,600
to value on PL, we advance to the not less or equal section here.

103
00:08:31,600 --> 00:08:37,540
You will typically insert your custom set of instructions to handle cases where value one is not less

104
00:08:37,540 --> 00:08:38,920
than or equal to value.

105
00:08:38,920 --> 00:08:39,370
Two.

106
00:08:39,460 --> 00:08:41,350
Subsequently GMP.

107
00:08:42,100 --> 00:08:42,240
Uh.

108
00:08:42,310 --> 00:08:43,480
Done here.

109
00:08:43,630 --> 00:08:49,900
Uh, instruction enables us to bypass the less or equal to actually.

110
00:08:49,900 --> 00:08:50,140
Yeah.

111
00:08:50,140 --> 00:08:50,470
Less.

112
00:08:50,470 --> 00:08:51,610
Or equal to.

113
00:08:52,500 --> 00:08:57,180
Uh section and head directly to done label.

114
00:08:57,180 --> 00:09:04,830
And conversely, when the comparison, uh, confirms that the value in Al is indeed less than or equal

115
00:09:04,860 --> 00:09:09,000
to the value in B, we proceed to the less or equal label.

116
00:09:09,000 --> 00:09:15,450
So with this segment, you will typically insert instructions to be executed when value of one is less

117
00:09:15,450 --> 00:09:17,130
than or equal to value.

118
00:09:17,130 --> 00:09:17,600
Two.

119
00:09:17,610 --> 00:09:25,140
And our journey culminates at the done label marking at the end of our program Logic.

120
00:09:25,290 --> 00:09:33,240
So this is the ideal location to include instructions for program termination or any necessary cleanup

121
00:09:33,480 --> 00:09:36,840
might involve system calls or resource management.

122
00:09:36,960 --> 00:09:39,570
And that's it with our lecture.

123
00:09:39,890 --> 00:09:42,750
Uh, jump if less or equal here.

124
00:09:42,750 --> 00:09:43,530
So.

125
00:09:44,550 --> 00:09:45,420
This, actually.

126
00:09:46,930 --> 00:09:48,730
Like, almost.

127
00:09:49,780 --> 00:09:55,420
The chord structure is almost the same as previous ones, but here the logic is different.

128
00:09:55,420 --> 00:09:57,460
So I'm waiting you in next lecture.