WEBVTT 00:00.570 --> 00:07.380 Now let's discuss some math instructions, so let's create a file called Math Dot Nazan. 00:09.750 --> 00:18.060 And let's once again use the global director of global space, underscore, stop and underscore, start 00:18.060 --> 00:26.730 here and let's surrender and let's right move instruction to move the value to into our register. 00:27.570 --> 00:33.830 Now we want to add eight to this value so we can use add instruction. 00:34.050 --> 00:38.220 So to do that at eight common eight. 00:38.690 --> 00:43.890 So we are adding the value eight to the value to which is stored in Addicks register. 00:44.370 --> 00:50.160 Now let's assume that we want to add the values that are stored in two different registers so we can 00:50.160 --> 00:55.430 do that by using at the first register and the second register. 00:55.800 --> 01:01.240 In this case, we are using 3X as the first register as well as the second register. 01:01.680 --> 01:11.040 So the value that is in X will be added with its own value and then it will be saved in array itself. 01:11.430 --> 01:18.390 So what this means is currently, after executing the second instruction, Arrigo's contains the value 01:18.420 --> 01:26.230 ten after executing this third instruction, ten plus ten 20 is going to be stored in the array register. 01:27.000 --> 01:30.180 Right now let's see how subtraction works. 01:30.720 --> 01:40.200 We can use the instruction sub and I'm going to use our comma five so the value of five will be subtracted 01:40.200 --> 01:46.710 from the value that is stored in the ATX register and the resulting value will also be stored in the 01:46.920 --> 01:47.760 text register. 01:48.150 --> 01:54.840 So in this case, the artifacts currently contains the value 20 and we are subtracting the value of 01:54.840 --> 01:55.260 five. 01:55.560 --> 01:59.730 So Orteig Register now contains value 15. 02:00.390 --> 02:07.920 Now let's see another important instruction, which is increment, as I mentioned, are currently contains 02:08.310 --> 02:08.910 15. 02:09.300 --> 02:11.790 Let's say you want to increment in by one. 02:11.950 --> 02:14.940 We can simply use increment on X.. 02:15.280 --> 02:17.770 So now it is going to contain the value of sixteen. 02:18.330 --> 02:20.100 Let's say we want to do it once again. 02:20.280 --> 02:27.300 Increment at X now we can also use decrement instruction to determine the value by one. 02:27.720 --> 02:34.710 So for instance, decrement R X decrement are X, so we are using it twice. 02:34.950 --> 02:42.460 So ultimately, after completing the execution of this program, our idea X should contain 15. 02:43.110 --> 02:49.560 So let's save this program and assemble it and link it and then let's load it in July. 02:50.340 --> 03:05.160 So I'm using nazem math dot nazan bashful math dot o f l 64 and let's link it using early math. 03:05.160 --> 03:09.310 Not all bashful math hender. 03:10.110 --> 03:12.180 Now let's look at it using GDP. 03:15.020 --> 03:20.090 All right, once again, let's set up a break point and the entry point of the program. 03:22.020 --> 03:26.810 And we can clear the screen by using exclamation mark before the command. 03:27.090 --> 03:31.760 So it is going to execute the system command, not on the GDP ship. 03:32.340 --> 03:35.040 So if you hit enter, it is going to clear the screen. 03:35.400 --> 03:39.090 Another way of doing it is to take shelf space clear. 03:39.510 --> 03:45.100 So once again, it is going to execute the command on the system instead of on the Julie Bishop. 03:45.420 --> 03:46.290 So let's hit enter. 03:47.500 --> 03:48.020 Look at that. 03:48.100 --> 03:49.870 So now let's run. 03:51.550 --> 03:58.060 And these are the instructions that we have written in our assembly program, once again, if you notice, 03:58.060 --> 04:05.410 the attic's is replaced with IEX, this could be once again because of the optimisations smeared before 04:05.410 --> 04:07.530 starting to execute these instructions. 04:07.540 --> 04:10.600 Let's examine what we have in the ATX register. 04:15.090 --> 04:21.030 As you can see, the orange register currently contains the value zero, so it's type site. 04:22.880 --> 04:28.930 Now to check the value of attacks registered, you don't have to always go to the register section. 04:29.330 --> 04:34.250 Instead, we can also type the command info that registers. 04:35.780 --> 04:40.820 If you notice the info registers, come on is basically showing us all the registers. 04:41.240 --> 04:45.290 Now, let's assume that you don't want to see the output of all the registers. 04:45.290 --> 04:47.800 You want to see only the ATX register. 04:48.350 --> 04:49.130 You can do that. 04:49.340 --> 04:54.150 InfoSpace registers and Addicks. 04:55.120 --> 04:56.050 There you go. 04:56.360 --> 04:57.890 It can be further simplified. 04:58.130 --> 05:05.600 We can just use E-Space ah instead of typing the complete info registers and we can type that. 05:05.600 --> 05:09.860 I just remember looking back, we are still getting the same output now. 05:09.860 --> 05:11.870 This is another way to examine the registers. 05:12.410 --> 05:16.610 So I'm clearing the screen and I'm typing S.I. 05:16.850 --> 05:19.600 So the next instruction is going to be executed. 05:19.940 --> 05:22.370 What is the next instruction that is. 05:29.890 --> 05:38.110 Ad rates come up eight devaluate is going to be added to the value that is currently stored in Attic's 05:38.110 --> 05:38.630 register. 05:38.650 --> 05:40.790 So currently, too, is stored there. 05:41.020 --> 05:47.590 So it is going to become ten and ten is going to be stored in attics register after executing the next 05:47.590 --> 05:48.230 instruction. 05:48.610 --> 06:00.290 So let's take a aside and let's try MySpace are irex look at that hexa a which is decimal point. 06:01.120 --> 06:07.940 Now we want to add the value of registering with itself and we want to store in Artex again. 06:08.320 --> 06:14.520 So now after executing this instruction codecs is going to contain the value of twenty. 06:14.980 --> 06:16.180 So let's assign. 06:18.080 --> 06:24.020 And let's use in for registers once again and look at that, Hecks 14 is 20. 06:25.140 --> 06:32.430 I can quickly assure that using the calculator I'm using this calculator here, I'm just typing 14 and 06:32.430 --> 06:35.690 let's move to decimal and D'Arrigo, it is 20. 06:36.300 --> 06:44.310 Now the next instruction that we are going to execute is sub artex, comma, hex five, which means 06:44.310 --> 06:52.470 five is going to be subtracted from the value of ATX, which is 20 here, and the resulting value should 06:52.470 --> 06:53.280 be 15. 06:53.700 --> 06:58.380 So let's type aside and once again examine the register. 06:58.380 --> 07:01.190 Artex, look at that. 07:01.230 --> 07:10.740 We have zero x f once again, let's type zero x F here and let's check the decimal equivalent of it 07:11.430 --> 07:12.150 and look at that. 07:12.150 --> 07:13.040 It is 15. 07:13.650 --> 07:21.720 Now, the next instruction that we are going to execute is increment at X, so this is going to become 07:21.750 --> 07:22.410 sixteen. 07:23.010 --> 07:26.970 Let's take Essi and let's examine our X.. 07:27.990 --> 07:28.590 Look at that. 07:28.590 --> 07:33.550 It is zero x 10 now, which is equal to decimal sixteen. 07:34.170 --> 07:35.940 So I'm just going to show that. 07:40.020 --> 07:40.600 Look at that. 07:40.650 --> 07:47.760 It is 16 now we have one more increment in structure, which is going to increment the value stored 07:47.760 --> 07:48.550 in this register. 07:48.960 --> 07:56.310 So let's step aside and let's examine the area for this and look at that in became Hecks 11. 07:56.820 --> 08:00.990 Now, the next instruction is going to diclemente the value by one. 08:01.440 --> 08:03.150 That means we are going backwards. 08:03.300 --> 08:08.150 Now, if I execute a site, it is going to become Heggs 10. 08:10.860 --> 08:11.460 Look at that. 08:12.150 --> 08:16.560 We are once again documenting this value of ADEX register. 08:16.890 --> 08:20.910 So let's try a site and examine the Register X. 08:22.380 --> 08:29.670 Look at that, we have gotten zero access into the ATX register once again, so this is how we can make 08:29.670 --> 08:37.380 use of add some increment and decrement instructions in 64 bit assembly language.