intrinsics
How to optimize a cycle?
I have the following bottleneck function. typedef unsigned char byte; void CompareArrays(const byte * p1S开发者_高级运维tart, const byte * p1End, const byte * p2, byte * p3)[详细]
2023-01-21 12:41 分类:问答How To Store Values In Non-Contiguous Memory Locations With SSE Intrinsics?
I\'m very new to SSE and have optimized a section of code using intrinsics. I\'m pleased with the operation itself, but I\'m looking for a better way to write the result. The results end up in three _[详细]
2023-01-20 09:40 分类:问答How to use NEON comparison (greater than or equal to) instruction?
How to use the NEON comparison instructions in general? Here is a case, I want to use, Greater-than-or-equal-to instruction?[详细]
2023-01-17 06:07 分类:问答SSE2 intrinsics: access memory directly
Many SSE instructions allow th开发者_StackOverflow中文版e source operand to be a 16-byte aligned memory address. For example, the various (un)pack instructions. PUNCKLBW has the following signature:[详细]
2023-01-09 01:46 分类:问答No xor gcc intrinsics for ARM NEON
I could not find any intrinsics for a simple xor operation. See: http开发者_运维技巧://gcc.gnu.org/onlinedocs/gcc/ARM-NEON-Intrinsics.html[详细]
2023-01-05 08:29 分类:问答Fast format conversion open source library [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.[详细]
2023-01-03 13:37 分类:问答Why does my data not seem to be aligned?
I\'m trying to figure out how to best pre-calculate some sin and cosine values, store them in aligned blocks, and then use them later for SSE calculations:[详细]
2023-01-02 02:03 分类:问答Data types for x86-64 processors
What are these data types for? __m64, __m128开发者_如何学Go, __m256 ?A quick google-search gives me:[详细]
2023-01-02 01:34 分类:问答g++ SSE intrinsics dilemma - value from intrinsic "saturates"
I wrote a simple program to implement SSE intrinsics for computing the inner product of two large (100000 or more elements) vectors. The program compares the execution time for both, inner product com[详细]
2023-01-01 23:43 分类:问答How to use VC++ intrinsic functions w/o run-time library
I\'m involved in one of those challenges where you try to produce the smallest possible binary, so I\'m building my program without the C or C++ run-time libraries (RTL).I don\'t link to the DLL versi[详细]
2023-01-01 07:53 分类:问答