sse

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SSE vectorization of math 'pow' function gcc

I was trying to vectorize a loop that contains the use of the \'pow\' function in the math library. I am aware intel compiler supports use of \'pow\' for sse instructions - but I can\'t seem to get it[详细]

2023-03-25 15:31 分类：问答
Intel FFT performance

What processor will perform better, i5-2500K or i7-960, regarding certain FFT operations per second, for example: complex FFT in-place on 16k buffer length?[详细]

2023-03-24 13:42 分类：问答
How do you get maximal speed out of SSE?

What are the best settings for stuff like MXCSR? Which rounding mod开发者_运维技巧e is fastest? On what processors? Is it faster to enable signalling NaNs so I get informed when a computation results[详细]

2023-03-24 04:23 分类：问答
Multiply Large Complex Number Vector by Scalar efficiently C++

I\'m currently trying to most efficiently do an in-place multiplication of an array of complex numbers (memory aligned the same way the std::complex would be but currently using our own ADT) by an arr[详细]

2023-03-24 03:25 分类：问答
How to detect sse availability in CMake

In a CMakeLists.txt file, is there a way to detect the highest level of SSE available, and save it to CMAKE_CXX_FLAGS? In other words, I\'d like to be able to write 开发者_JS百科something like:[详细]

2023-03-24 03:17 分类：问答
How to compare two vectors using SIMD and get a single boolean result?

I have two vectors of 4 integers each and I\'d like to use a SIMD command to compare them (say generate a result vector where each ent开发者_JAVA技巧ry is 0 or 1 according to the result of the compari[详细]

2023-03-24 00:56 分类：问答
Reference manual/tutorial for x86 SIMD intrinsics? [closed]

Closed. This question is seeking recommendations for books, tools, software libraries, and more. It does not meet Stack Overflow guidelines. It is not currently accepting answers.[详细]

2023-03-23 17:58 分类：问答
Fast method to copy memory with translation - ARGB to BGR

Overview I have an image buffer that I need to convert to another format.The origin image buffer is four channels, 8 bits per channel, Alpha, Red, Green, and Blue.The destination buffer is three chann[详细]

2023-03-22 17:14 分类：问答
What is the purpose of a movss instruction with [this] as destination?

I found this line in code generated by the MSVC compiler from Visual Studio 2008, while trying to figure out what seems to be a compiler bug:[详细]

2023-03-20 05:14 分类：问答
Difference between MOVDQA and MOVAPS x86 instructions?

I\'m looking Intel datasheet: Intel® 64 and IA-32 Architectures Software Developer’s Manualand I can\'t find the difference between[详细]

2023-03-19 19:09 分类：问答