Vanilla C drop in replacement for intel intrinsics? [closed] - c

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For each avx, sse4 etc intrinsic there is an open logical algorithm. I wonder if there is an official or unofficial drop in replacement of intrinsics with vanilla C code (for debugging, prototyping on arm etc)?

I have a project, SIMDe, that does it. It's not complete, but it's more substantial than anything else I'm aware of. Contributions welcome ;)

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Sample program in CCStudio [closed]

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Could we do the sample program without having its Launchpad in CCStudio (For example, We can program the Microchip IDE without having the PIC microcontroller connected)?
Of course. You can compile and link project without hardware. You cannot if course load, run or debug it (unless you use a simulator).

What techniques can be used to reduce stack memory usage? [closed]

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I am programming for an embedded system, where resources are at premium cost.
A few techniques that I am aware of are -
Remove/Reduce unused variable/memory.
Use macros for small/inline functions.
Is there anything else that I can use for this? Also, please correct if I am wrong.
Please Note: I am not asking exclusively about low level programming.
Let's say I am bound to use some particular amount of stack memory only. My program doesn't use recursion.

Changing values of CPU registers under GNU/Linux [closed]

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Is it possible to change values of CPU registers under GNU/Linux with help of C programming language code?
To answer your question: Using standard C then no it's not possible.
But some compilers have extensions to allow you to write inline assembler. Also, you can write your own assembler files and have functions that can be called from your C source in them. Use an assembler to create object files that you link with the rest of your program.

Advice on when to use macros in C and when not to use [closed]

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If you see the gcc source code, you see that they use macros a lot. But generally, programmers are advised to avoid macros as they make the code harder to read.
Why then the gcc devs use so much of macros?
Please provide advice on when to use macros and when not to use.
Any references are welcome.

can anyone explain to me how bufferevent ( in libevent) works for non-blocking sockets? [closed]

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The documentation for libevent 2.0 isn't easy to understand. Can anyone point me to a tutorial?
http://www.wangafu.net/~nickm/libevent-book/
is a great tutorial on libevent, with loads of examples. As a bonus, it's written by Nick Mathewson, one of the two maintainers of the libevent project.
For bufferevents, you can look at the basics as well as the advanced bits.

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