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c++ Programming Glossary: intrinsicsHow do I convert between big-endian and little-endian values in C++? http://stackoverflow.com/questions/105252/how-do-i-convert-between-big-endian-and-little-endian-values-in-c machines and vice versa. Other compilers have similar intrinsics as well. In GCC for example you can directly call int32_t __builtin_bswap32.. as well. 16 bit swap it's just a bit rotate. Calling the intrinsics instead of rolling your own gives you the best performance and..
C++ Tips for code optimization on ARM devices http://stackoverflow.com/questions/10800372/c-tips-for-code-optimization-on-arm-devices powerful and for vectorizable code can be quite fast. NEON intrinsics are available in most C environments and can be nearly as fast..
Fastest way to scan for bit pattern in a stream of bits http://stackoverflow.com/questions/1572290/fastest-way-to-scan-for-bit-pattern-in-a-stream-of-bits flag results for each byte or word as it arrives C code intrinsics x86 machine code would all be interesting. c c algorithm assembly..
http://stackoverflow.com/questions/195853/spinlock-versus-semaphore system. In the past this meant using either compiler intrinsics or non portable assembler instructions. Meanwhile both C 11..
Determining the alignment of C/C++ structures in relation to its members http://stackoverflow.com/questions/364483/determining-the-alignment-of-c-c-structures-in-relation-to-its-members answers not reliable not portable with c non POD compiler intrinsics eg. MSVC __alignof works with flexible arrays alignof keyword..
Can I force cache coherency on a multicore x86 CPU? http://stackoverflow.com/questions/558848/can-i-force-cache-coherency-on-a-multicore-x86-cpu Events and so on. I'm mostly wondering if there are x86 intrinsics that I'm not aware of which force or can be used to enforce..
http://stackoverflow.com/questions/661338/sse-sse2-and-sse3-for-gnu-c is a good idea see section 4.3.1.2 for an example of intrinsics and the SIMD sections are essential reading. The instruction.. inspecting the assembler produced by the compiler from intrinsics you'll learn a lot and on profiling performance measurement.. . Update 2011 05 31 There is some very nice coverage of intrinsics and vectorization in Agner Fog's optimization PDFs thanks although..
http://stackoverflow.com/questions/714692/alloca-implementation function. The most likely case is the compiler offers some intrinsics which allow library writers to ask the compiler for the help..
SSE intrinsic functions reference [closed] http://stackoverflow.com/questions/7156908/sse-intrinsic-functions-reference useful utility which summarises all the instructions and intrinsics and groups then by technology. It runs on Linux Windows and.. Go to http software.intel.com en us articles intel intrinsics guide and then select the Intel Intrinsics Guide for your platform..
Using AVX CPU instructions: Poor performance without “/arch:AVX” http://stackoverflow.com/questions/7839925/using-avx-cpu-instructions-poor-performance-without-archavx to include this #include immintrin.h and then you can use intrinsics AVX functions like _mm256_mul_ps _mm256_add_ps etc. The problem.. compiler to produce AVX code but only when I specify AVX intrinsics directly. For SSE it works I just use SSE intrinsics functions.. AVX intrinsics directly. For SSE it works I just use SSE intrinsics functions and it produce SSE code without any compiler options..
Efficient bitwise operations for counting bits or find the right|left most ones http://stackoverflow.com/questions/9093323/efficient-bitwise-operations-for-counting-bits-or-find-the-rightleft-most-ones
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