"there are two types of programmers - those who have written a compiler and those who haven't" - Terry "The greatest programmer that's ever lived" Davis
15:53 There is nothing with RDI register, just (in Linux) the exit codes are specified in the range 0-255 (1 byte). The number 420 lost its most significant bytes and became 164.
Here is a visualization of what you are saying | 00000000 | 0000000 | 00000001 | 10100100 | rdi register (420) | | | | 10100100 | return syscall (164) The return syscall only views the first 8 bits of the 64 bit rdi register
`man 3 exit` states: "The exit() function causes normal process termination and the least significant byte of status (i.e., status & 0xFF) is returned to the parent." Turns out `420 & 0xFF == 164`.
@@doresearchstopwhining "a little" is very important here, I kind of like the bare-bones explanation. there are definitely some parts that are unnecessary, and maybe some visualization..s? i don't know. but i hope this guy doesn't become into an over-stimulating mess.
I really appreciate that the sequences, where you are not quite sure are NOT cut out. It's really helpful, to see the thought process in a specific language / context, when you are not sure what to do. For example, which docs to turn to, or how to use intellisense etc. to find the information one needs to solve the problem. Seeing just some finished code explained is not nearly as helpful as this format in my opinion. Very watchable. Thank you!
Mistakes and forgetting easy things. Something I tell newbies is that you don't need to memorise content but rather know that it exists and understand it when you see it again. E.g. what an entry point is, not the exact syntax.
No cap, how do I donate? Never even considered donating to a TH-camr before but this, but this is the content that’s enjoyable. Not the average hour long video with cuts and edits everywhere, because every time the person has to look something up it’s all secretive and never seen. I got a lot of respect for someone that is probably a little bit nervous because they may be using a language they’re not be 110% comfortable or familiar with, but is well and truly comfortable enough to show what’s going on in their head as they walk through the project and show all the pivots and everything that’s happening. I fucking love it, I got a lot of respect for it and I want to support this kind of “free thought with a goal” style TH-cam videos. If you’ve got some way to accept donations, let me know 🙌💪
You make the learning so much more approachable for people with no previous understanding of compilers or asm. This style of teaching where you build a project live while explaining why you make that decision is so comprehensible. Thank you
One underated aspect of this kind of videos is that making mistakes is actually good to keep in the video instead of editing it out. Really makes it engaging and relatable as if we're doing it together. Great content !
This is unironically the exact type of video I wanted to see about this topic. A "Let's build X" from start to finish with really great commentary and explanation on the side. Keep it up man
I came across this and was compelled to sit all the way through it. I love your delivery, your voice and that you haven't edited anything, leaving in your mistakes. Thank you
As a self taught software engineer that loves going deep into all the layers this is great introduction! Currently Im building VM's for Chip8 and Gameboy, and writing VMs REALLY helped me to understand how a computer works from a binary level. Feels really genuine that you dont know everything and use Google, really shows how the day to day of a software engineer is.
I whole-heartedly appreciate how you approach communication, have subscribed, and am looking forward to both learning from and seeing the growth of this channel. Stay grounded!
I want to correct the record: Rust is sacrilege, C++ is a sin, but C is pure. Come into the light, my child. Embrace C. It loves you, even with all your flaws.
And the Lord spake, saying, "First shalt thou develop thy programme. Then, shalt thou compile in C. No more. No less. C shalt be the language thou shalt compile, and the language of the compilation shalt be C. C++ shalt thou not compile, nor either compile thou preprocessing, excepting that thou then proceed to C. Rust is right out. Once the language C, being the proper language, be written, then lobbest thou thy Holy Hand Grenade of Antioch towards thy foe, who, being naughty in My sight, shall snuff it."
this guy keeps giving me Steven he vibes. And please don't stop. don't be discouraged by the number of subs or views just do what you are doing. This is after all god's work
first video ive seen of yours and i love that you go into detail and try to explain stuff the viewer may not understand, it really helped me understand and enjoy the video more. keep it up!
Just stumbled upon this video thanks to TH-cam's recommendations, and I'm already amazed by the content. Haven't had a chance to watch it all the way through yet, but it's clear that a subscription is well-deserved. Can't wait to dive into the rest of the video!
Oh, it's nice to see someone else making long-form coding videos like this. There are far too few people making this sort of content. I really hope you continue.
I love this! I started a project similar to this a while back but never got anywhere. Your ability to explain something is incredible! Can’t wait to see how this goes.
Wow, this video is incredible! The way you code is truly impressive. Your approach to understanding how things work reminds me of myself. I often worry about forgetting syntax, but you've reassured me that it's normal to forget syntax.
Sir absolute solid teaching style. Really enjoyable to watch and follow along. Perfect pacing, just the right amount of wit and crisp information. This ist the first video I watched from you, and you already earned a new subscriber. Keep up the amazing work!
> TH-camr I've never heard of > "Let's Create a Compiler" > "part 1" > over 1hr long *sighs* fine... In all seriousness, this does interest me so I'm glad I got the recommendation for it!
This was so helpful to watch. Ty for not cutting out the errors etc. Seeing how you thought through and resolved them really made this much more educational.
Dude, this was amazing. Thank you so much. To be honest, I had fallen asleep on the sofa and woke up at 4AM. I put this video on almost at random to go to sleep horizontally on an actual bed. I thought "I hope this dude isn't really annoying" but I ended up staying up to watch it. If you did this basically off the cuff, it's brilliant. If not, it's brilliant. I am *super* excited to watch the next parts. You're helping answer a question I've had for years and doing it wonderfully. Have a great weekend!
Hey Pixeled, thank you for this video about Compilers. At around 17:00 when dealing with your program exit code, you put 420 into rdi and get 164 in return. That is totally normal and It has nothing to do with registers, that is just how exit(2) works, the exit code is masked with 0xFF so the exit value cannot exceed 255 : " The value status & 0xFF is returned to the parent process as the process's exit status". Cheers ! o/
This is a great way of teaching when you are showing your unscripted research, googling, what goes through your head, making and fixing mistakes, starting with a naïve approach, reinventing bicycles, etc. This teaches much more about the subject than just giving a final polished solution.
Thank you so much for doing something actually interesting, as opposed to mind numbing web dev tutorials. I’m a mid level programmer by day and looking to do more low level stuff as a hobby. I really liked that you didn’t cut the video, and did some of your research on the fly. It was like hanging out with a buddy. Fun video!
i love that this guy simply woke up and decided he wanted to teach us to create a compiler without even researching or scripting the videos, just pure skills and remembering the syntax on the go. thanks for the content!
It just came up on my feed and I could not resist. This is what I am talking about! This is the engine room of the ocean liner (metaphorically speaking) Great presentation.
I've been thinking of making a big project like a basic game engine without any libraries but I'm not really out of my comfort zone yet lol. This video is great and I've seen your whole channel is pretty good too.
I've actually done that too, if you look on my GitHub for "Voxelverse", it's a Minecraft clone written in c++ that uses vulkan directly without any game engine/framework. I might make a video on it in the future
I really like how you explain things. No need to make anything look more complicated than it is. For learning, it much more efficient to focus relevant parts, not nyances.
the content is enjoyable thank you man I checked your profile and I think that you have a bright future, keep it up ( I finished all straight to the end )
The important difference is that the value 420 is never truncated by the assembler itself, nor the limitation of the rdi register. The 64-bit value gets passed as is to the kernel, and the exit code is indeed taken by modulo 256.
i think it just takes dl register not rdi, you can use rdi but linux syscall is still using the lowest part of this register in terms of compatability I suppose
It's obvious you were struggling with C++, so exactly at 37:45 I said to myself "If there's an error right there or if it doesn't print anything, I'm going to sub this guy". Seconds later, I died of laughter and subbed, the video is top tier quality. I'm happy I found this gem of channel lol.
I turned into a man that watches compiler videos for entertainment, props to you for making it so entertaining
ahaha me too wtf
same
I was looking for something to watch while having dinner and YT recommended this. It'll have to do I guess.
Prep less programming tutorials are always funny😂
lol same
This dude : "I can´t remember how to do this"
*Start to create a fucking compiler*
😂😂😂
"I'm not gonna use rust because I write memory safe code"...
The memory safe code: "Does this have a destructor?... I'm gonna assume it does" (36:30)
🤣
It indeed does have it, an automatically created one.
But yeah, .... memory safe code, ...
"I am not gonna use rust because the community is terrible" is a better reason tbh
@@Sh4dowOfD34th what's so wrong about community tho
@@AbsoluteVR I got verbally abused for saying C++ is better
"there are two types of programmers - those who have written a compiler and those who haven't"
- Terry "The greatest programmer that's ever lived" Davis
I studied CS in the same halls as that man... nay, that God.
Would creating a database engine from scratch and sql compliant be considered at that level too?
No, you should also build the operating system and the hardware, transistor by transistor
I'm trying😭
@@doomsday7699better use lamps
No way, Tsoding at home 😮
That was the first thing I thought too
it's the Iosevka that does it for me
💀
Tsoding without emacs
American, windows using Tsoding
15:53
There is nothing with RDI register, just (in Linux) the exit codes are specified in the range 0-255 (1 byte).
The number 420 lost its most significant bytes and became 164.
Here is a visualization of what you are saying
| 00000000 | 0000000 | 00000001 | 10100100 | rdi register (420)
| | | | 10100100 | return syscall (164)
The return syscall only views the first 8 bits of the 64 bit rdi register
@@sethbuchanan6937 Thank you!
I was looking for this. not high enough^^ have my upvote.
`man 3 exit` states: "The exit() function causes normal process termination and the least significant byte of status (i.e., status & 0xFF) is returned to the parent." Turns out `420 & 0xFF == 164`.
This, the exit code is char-sized
I can tell this channel will go somewhere with commitment, keep up the good work!
decided to comment to say the same thing.
totally agree. Maybe a little more editing but I think this guy can explain things well
@@doresearchstopwhining "a little" is very important here, I kind of like the bare-bones explanation. there are definitely some parts that are unnecessary, and maybe some visualization..s? i don't know. but i hope this guy doesn't become into an over-stimulating mess.
Subbed just watching this comment within 1 min into video.
Yes! Please keep going! Looking forward to your next videos
I really appreciate that the sequences, where you are not quite sure are NOT cut out. It's really helpful, to see the thought process in a specific language / context, when you are not sure what to do. For example, which docs to turn to, or how to use intellisense etc. to find the information one needs to solve the problem. Seeing just some finished code explained is not nearly as helpful as this format in my opinion. Very watchable. Thank you!
True! In fact, I think showing the thought process is the most useful part of these type of videos.
I don't think I would have finished the video if it was streamlined and cut down
and hella fun
"This is very safe code"
"I'll figure it out when it crashes on me"
love this guy
I like that you are not afraid of showing your mistakes, because that is how you learn - keep creating more
Mistakes and forgetting easy things. Something I tell newbies is that you don't need to memorise content but rather know that it exists and understand it when you see it again. E.g. what an entry point is, not the exact syntax.
No cap, how do I donate?
Never even considered donating to a TH-camr before but this, but this is the content that’s enjoyable.
Not the average hour long video with cuts and edits everywhere, because every time the person has to look something up it’s all secretive and never seen.
I got a lot of respect for someone that is probably a little bit nervous because they may be using a language they’re not be 110% comfortable or familiar with, but is well and truly comfortable enough to show what’s going on in their head as they walk through the project and show all the pivots and everything that’s happening.
I fucking love it, I got a lot of respect for it and I want to support this kind of “free thought with a goal” style TH-cam videos.
If you’ve got some way to accept donations, let me know 🙌💪
I'm lucky enough to not need the money. I do this for fun. It's the thought that counts, thanks!
@@pixeled-yt Legend, and you're humble too!
You can't donate to smaller channels I think. Kinda sad since usually they are the ones that need it the most.
@@NullPointerDereference I was happy to PayPal or Patreon lol
You make the learning so much more approachable for people with no previous understanding of compilers or asm. This style of teaching where you build a project live while explaining why you make that decision is so comprehensible. Thank you
Humanizing programming
learning from this one is learning the wrong things.
@@Merilix2 elaborate maybe?
One underated aspect of this kind of videos is that making mistakes is actually good to keep in the video instead of editing it out. Really makes it engaging and relatable as if we're doing it together. Great content !
This is unironically the exact type of video I wanted to see about this topic. A "Let's build X" from start to finish with really great commentary and explanation on the side. Keep it up man
I came across this and was compelled to sit all the way through it. I love your delivery, your voice and that you haven't edited anything, leaving in your mistakes.
Thank you
As a self taught software engineer that loves going deep into all the layers this is great introduction! Currently Im building VM's for Chip8 and Gameboy, and writing VMs REALLY helped me to understand how a computer works from a binary level. Feels really genuine that you dont know everything and use Google, really shows how the day to day of a software engineer is.
Google is our best friend
Damn bro i wish i was like u
based
do you mind sharing a few resources that have helped you in that direction ? I too want to write an emulator
"This is SO safe" has got to be my favorite quote from this video :D
“Thats right. We have our first Seg fault”. I fucking died.
I whole-heartedly appreciate how you approach communication, have subscribed, and am looking forward to both learning from and seeing the growth of this channel. Stay grounded!
I want to correct the record: Rust is sacrilege, C++ is a sin, but C is pure. Come into the light, my child. Embrace C. It loves you, even with all your flaws.
true dat
Amen
We love C!!! 😍😍😍
Nuh uh bro, we already have Tsoding for C, let the man C++
And the Lord spake, saying, "First shalt thou develop thy programme. Then, shalt thou compile in C. No more. No less. C shalt be the language thou shalt compile, and the language of the compilation shalt be C. C++ shalt thou not compile, nor either compile thou preprocessing, excepting that thou then proceed to C. Rust is right out. Once the language C, being the proper language, be written, then lobbest thou thy Holy Hand Grenade of Antioch towards thy foe, who, being naughty in My sight, shall snuff it."
man this is one of the best, most informative videos i've ever seen
please continue the series. this one's beyond amazing
You made the process of creating a compiler so straightforward and intuitive, I wish I had this video in school during my compiler class!
This video is so underrated. Very simple and easy to understand to get you started with the world of compiler development! Thanks 🎉🎉🎉
this guy keeps giving me Steven he vibes. And please don't stop. don't be discouraged by the number of subs or views just do what you are doing. This is after all god's work
first video ive seen of yours and i love that you go into detail and try to explain stuff the viewer may not understand, it really helped me understand and enjoy the video more. keep it up!
Just stumbled upon this video thanks to TH-cam's recommendations, and I'm already amazed by the content. Haven't had a chance to watch it all the way through yet, but it's clear that a subscription is well-deserved. Can't wait to dive into the rest of the video!
Excited to see more of this series. Very good energy- keeping it informative and entertaining. Nice work!
super cool style with experimentation. Pls keep up. thank you very much : )
Oh, it's nice to see someone else making long-form coding videos like this. There are far too few people making this sort of content. I really hope you continue.
Man you deserve way more subscribers, I am glad I got this recommended and found you!!
the most relatable think is when you wrestle with the c++ language to get it to do what you want
your explanation style is amazing. non-monotone, slightly fast paced. its exactly like how i would explain something. love it
I love this! I started a project similar to this a while back but never got anywhere. Your ability to explain something is incredible! Can’t wait to see how this goes.
same
Wow, this video is incredible! The way you code is truly impressive. Your approach to understanding how things work reminds me of myself. I often worry about forgetting syntax, but you've reassured me that it's normal to forget syntax.
Sir absolute solid teaching style. Really enjoyable to watch and follow along. Perfect pacing, just the right amount of wit and crisp information.
This ist the first video I watched from you, and you already earned a new subscriber.
Keep up the amazing work!
I’ve been missing this kind of content for a while. This is great, keep it up!!
Liked your way of explaining things and showing everything hand on. Keep up the work waiting for new videos of this series!!
Didn't know anything about complier but always wanted to know - watching you explaining is really a awesome feeling - good luck 🎉
"It's not good code, but I just wanted to get something working."
This is the way to write code. First, make it work. Then, make it optimized.
the spirit brooooooo!
> TH-camr I've never heard of
> "Let's Create a Compiler"
> "part 1"
> over 1hr long
*sighs* fine...
In all seriousness, this does interest me so I'm glad I got the recommendation for it!
I never thought that I would enjoy watching a 'creating compiler' video. Good content
This was so helpful to watch. Ty for not cutting out the errors etc. Seeing how you thought through and resolved them really made this much more educational.
"We can refactor it later" is so relatable
Amazing. Never seen a devlog explained this good.
This is really opening my eyes, thank you man! I hope that you will continue this series, all the best!
This is some top tier tutorial. You explain everything so well....
Easily one of the best personalities that I've seen in CompSci, keep up the good work!
Dude, this was amazing. Thank you so much. To be honest, I had fallen asleep on the sofa and woke up at 4AM. I put this video on almost at random to go to sleep horizontally on an actual bed. I thought "I hope this dude isn't really annoying" but I ended up staying up to watch it. If you did this basically off the cuff, it's brilliant. If not, it's brilliant. I am *super* excited to watch the next parts. You're helping answer a question I've had for years and doing it wonderfully. Have a great weekend!
Great video bro, I’m looking forward to seeing the next one!
Absolutely love this style! Keep it up!
Awesome video! Really hope you continue with this series.
Your way of explaining things is really entertaining. I hope to see more content in the future!!
please keep the one-take style videos like this, it really helps a lot like many other people already stated.
Georgeus video! I would love to follow along with this series
Keep up the good work! You've earned yourself another subscriber.
Hey Pixeled, thank you for this video about Compilers. At around 17:00 when dealing with your program exit code, you put 420 into rdi and get 164 in return. That is totally normal and It has nothing to do with registers, that is just how exit(2) works, the exit code is masked with 0xFF so the exit value cannot exceed 255 : " The value status & 0xFF is returned to the parent process as the process's exit status". Cheers ! o/
I’m really looking forward to the next instance of this. Keep it up!
This is a great way of teaching when you are showing your unscripted research, googling, what goes through your head, making and fixing mistakes, starting with a naïve approach, reinventing bicycles, etc. This teaches much more about the subject than just giving a final polished solution.
Thank you so much for doing something actually interesting, as opposed to mind numbing web dev tutorials. I’m a mid level programmer by day and looking to do more low level stuff as a hobby.
I really liked that you didn’t cut the video, and did some of your research on the fly. It was like hanging out with a buddy. Fun video!
Thank you, it's extremely informative. Keep on!
what a great video honestly, love your way of teaching, didn't get me bored to death and learned a lot in the process
This was great! Keep at it!
Fascinating stuff. Can't wait for the next episodes.
This is not only an educational video, but also an entertaining one
Nice work! This is really great
Wow. Yes, this is the kind of content I need in my feed. Good stuff!
this is what i have playing instead of podcasts now
Great video. Keep up the good work
i love that this guy simply woke up and decided he wanted to teach us to create a compiler without even researching or scripting the videos, just pure skills and remembering the syntax on the go. thanks for the content!
It just came up on my feed and I could not resist. This is what I am talking about! This is the engine room of the ocean liner (metaphorically speaking) Great presentation.
thanks for making these fun && informative videos mate!
Its like youtube knew I have a compiler class coming up soon. Thank you!
Wow amazing! Was actually great to follow along thanks for sharing
Fun and simple video explaining such complicated theme
I’ve never thought that watching a programming tutorial can be entertaining 👍 Thank you for that
really cool stuff! loved it
very nice viedo, not just trowing information at you but actually showing how one can find that information! thanks a lot
This was very entertaining, now I want to try writing my own compiler for memes. Keep up the good work, I’m subbing for sure.
a new hidden gem just found !, keep up... your content is really unique and awesome !!
I've been thinking of making a big project like a basic game engine without any libraries but I'm not really out of my comfort zone yet lol. This video is great and I've seen your whole channel is pretty good too.
I've actually done that too, if you look on my GitHub for "Voxelverse", it's a Minecraft clone written in c++ that uses vulkan directly without any game engine/framework. I might make a video on it in the future
I really like how you explain things. No need to make anything look more complicated than it is. For learning, it much more efficient to focus relevant parts, not nyances.
Very cool video! Hope to see this continue.
7:52 "who isn't in 64bits in 2023 ?"
*embedded developer* : hold my beer !
(Really good video btw, I just discovered and I subscribed !)
Love your work, keep going!
I'm also writing my own compiler from scratch, I'll be looking forward to this series!
the content is enjoyable thank you man I checked your profile and I think that you have a bright future, keep it up
( I finished all straight to the end )
I actually sit through the whole video. Not gonna lie, I enjoy every single seconds of it and looking forward to the whole series...
this have tsoding vibe and i love it. i hope your channel will grow big
I love how not cut the video is, it's so useful for us to see even when you're not sure about something!
Btw you're the most chad Windows user XD
Finally! A C++ Video that isn't a tutorial. Please continue this series, it will prove to be extremely useful.
I'm all in on the whole series. Let's gooooo
I can't explain how much I love this video
Can't wait for second part!!
Love the whole unscripted and figuring errors on the fly. Like we all do! Well done.
keep going , thanks youtube for recommending me this gem
Man this video is so fun and useful at the same time
The exit code returned by the kernel is taken modulo 256, so you'll get the remainder when 420 is divided by 256, which is 164.
Technically the assembler knows the size of each register, so it would just take the 8 bits necessary for the machine code, no modulus needed :)
Thanks for the explanation. I think this is in line with what Pixeled said in the video.
The important difference is that the value 420 is never truncated by the assembler itself, nor the limitation of the rdi register. The 64-bit value gets passed as is to the kernel, and the exit code is indeed taken by modulo 256.
i think it just takes dl register not rdi, you can use rdi but linux syscall is still using the lowest part of this register in terms of compatability I suppose
I wish you more success. You and Tsoding keeps me motivated. Thank you
It's obvious you were struggling with C++, so exactly at 37:45 I said to myself "If there's an error right there or if it doesn't print anything, I'm going to sub this guy". Seconds later, I died of laughter and subbed, the video is top tier quality. I'm happy I found this gem of channel lol.
So interesting, it’s really cool content, pls keep it up ❤