Linked by Thom Holwerda on Mon 6th Aug 2012 21:50 UTC, submitted by iseyler
General Development I asked for more of this, and I got it. "There has been much interest in assembly lately (whether the real 6502, or the fictional DCPU-16; I even created my own virtual 8-bit CPU called i808 in 2007), but none of this attention focuses on the architecture that is most popular in today's computers. If you are reading this on a desktop, laptop, or server then your computer is most likely using x86-64 (or x86). x86-64 is the 64-bit superset of the 32-bit x86 architecture and any modern CPU from AMD or Intel supports it. This document will focus on the most used parts of x86-64."
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RE[2]: Uh?
by moondevil on Tue 7th Aug 2012 15:55 UTC in reply to "RE: Uh?"
moondevil
Member since:
2005-07-08

Apart from learning more about the internals of the CPU, is there a good reason to learn assembly language at all these days if one just wants to develop regular apps/utilities? In my case for Linux/Ubuntu/Gnome...


If you even plan to develop:

- drivers;
- operating systems utilities;
- games;
- compilers (either ahead-of-time or JIT based);
- audio or video codecs;
- develop applications that need to run in embedded systems
- numeric code for statistics like FFT
- optimization of code compreension

Than knowing Assembly is really a must.

If you spend you time developing code in languages with native code generation (C, C++, FreePascal, D, Go), or using V8, compatible JVM or CLR then Assembly is important to understand how the high-level algorithms influences the generated Assembly.

Because you can ask to see the generated Assembly and then compare it with the algorithm.

Knowing Assembly makes it also easy to know how to manipulate JVM bytecode or MSIL, and with it perform low level meta-programming. This is how Aspects work, for example.

Another example is how Qt 5 will make use of SIMD instructions to do perform encoding conversions,
http://woboq.com/blog/utf-8-processing-using-simd.html

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