sse2 download

logical shift of bits. SSE2 contains the PSLLDQ command. The DQ here is the meaning of Double QWORD, Isn't this exactly the-bit shift we need? No! Let's take a look at Intel's documents: PSLLDQ -- Packed Shift Left Logical Double Quadword Or Http://moeto.comoj.com/project/intel/instruct32_hh/vc255.htm As follows: We can see that, unfortunately, SSE2 does not achieve-bit shift by bit. PSLLDQ can only achie

Recently, we used Intel's media SDK to play H264 videos. We found that the frames transcoded by intel's SDK are in the NV12 pixel format and must be converted to the RGB32 format by ourselves. Although this type of code looks for a lot on the Internet, you can do it yourself. Google's conversion formula: C = Y-16D = U-128E = V-128R = clip (round (1.164383 * C + 1.596027 * E ))G = clip (round (1.164383 * C-(0.391762 * D)-(0.812968 * E )))B = clip (round (1.164383 * C + 2.017232 * D )) I studied h

This section describes the sse2 Integer Operation commands. 5. Data Migration instructions MovdqaXMM, XMM/m128 MovdqaXMM/m128, XMMThe source memory content value is sent to the destination register. When m128 exists, the memory address must be 16 bytes aligned. MovdquXMM, XMM/m128 MovdquXMM/m128, XMMThe source memory content value is sent to the destination register, and the memory address does not need to be 16 bytes aligned. Movq2dqXM

One of my interesting programming directions is the large number of calculations, so in assembly language to write a lot of large number of computational aspects of small programs, and last week suddenly came up with a SSE2 instruction to convert integers into 16 strings of a good idea, then put into implementation. Originally thought can speed up to 500%, that test found that, compared to the original C language version, the speed has been increased

// Http://stackoverflow.com/questions/1715224/very-fast-memcpy-for-image-processing CourtesyWilliam Chan and Google. 30-70% faster than memcpy in Microsoft Visual Studio 2005. void X_aligned_memcpy_sse2(void* dest, const void* src, const unsigned long size_t){ __asm { mov esi, src; //src pointer mov edi, dest; //dest pointer mov ebx, size_t; //ebx is our counter shr ebx, 7; //divide by 128 (8 * 128bit registers) loop_copy: prefetchnta 128[ESI]; //

YourselfProgramTo share with you. It's dangerous to remember sprintf! VC ++ 2008 in debug mode # Include This program gets stuck when it is executed to free, and F11 is used for debugging until it reaches the assembly language. JMP _ vec_memzero; Use fast zero sse2 implementation The system stops and displays "No information available for the current location ".Source code". Cause: Invalid Memory Access, subscript out of bounds.

Http://www.mathblog.dk/project-euler-46-odd-number-prime-square/ Not a hard one to code, but it can be optimized using SSE2 instructions. The code below runs with g++ 4.8.1: g++-g-c RIDDLE.CPP-STD=C++11-MSSE2-PGg++-O riddle.exe riddle.o-pgObjdump-d-M intel-s riddle.o > Assembly.txtRiddleGprof Riddle.exe gmon.out > Report.txt And here is the code: #if defined (__sse2__) #include

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