sse

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Optimzing SSE-code

I\'m currently developing a C-module for a Java-application that needs some performance improvements (see Improving performance of network coding-encoding for a background). I\'ve tried to optimize th[详细]

2023-04-13 08:35 分类：问答
Why do SSE integer averaging instructions (PAVGB/PAVGW) add 1 to temporary sum before calculating final result?

I have been working on SSE optimization for a video processing algorithm recently. I need to write the exactly same algorithm in C code to cross-check correctness of the algorithm. I forgot about this[详细]

2023-04-12 02:52 分类：问答
SSE instructions: which CPUs can do atomic 16B memory operations?

Consider a single memory access (a single read or a single write, not read+write) SSE instruction on an x86 CPU. The instruction is accessing 16 bytes (128 bits) of memory and the accessed memory loca[详细]

2023-04-11 03:05 分类：问答
SSE micro-optimization instruction order

I have noticed that sometimes MSVC 2010 doesn\'t reorder SSE instructions at all. I thought I didn\'t have to care about instruction order inside my loop since the compiler handles that best, which do[详细]

2023-04-01 22:08 分类：问答
Is there any interface to call __libm_sse2_sincos under MSVC?

I\'m currently working on an optimization of some C codes under MSVC, in which some sin() and cos() calculations are performed.[详细]

2023-04-01 15:01 分类：问答
Missing strlen_sse4.S results in Segmentation Fault

i\'m writing a small tool written in c and met on a segmentation fault which i don\'t know currently how to resolve. Running in GDB gives me the following hint:[详细]

2023-03-31 17:38 分类：问答
NEON vs Intel SSE - equivalence of certain operations

I\'m having some trouble figuring out the NEON equivalence of a couple of Intel SSE operations. It seems that NEON is not capable to handle an entire Q register at once(128 bit value data type). I hav[详细]

2023-03-31 12:36 分类：问答
What's the best way to load 2 unaligned 64-bit values into an sse register with SSSE3?

There are 2 pointers to 2 unaligned 8 byte chunks to be loaded into an xmm register. If possible, using intrinsics. And if possible, without using an auxiliary register. Without pins开发者_开发问答rd.[详细]

2023-03-31 10:41 分类：问答
Compilation error when perfoming SSE in C++

My code is very simple for understanding SSE. My code is: #include <iostream> #include <iomanip&开发者_高级运维gt;[详细]

2023-03-31 10:27 分类：问答
Aliasing of NEON vector data types

Does NEON support aliasing of the vector data types with their scalar components? E.g.(开发者_如何转开发Intel SSE)[详细]

2023-03-30 19:32 分类：问答