I\'m using NEON SIMD instruction to write a part of an Android app, targ开发者_如何学编程eting Cortex A8 processors. According to this reference manual, NEON supports 16-bit and 32-bit floats, that is
I\'m using OpenGL to do some image processing on each frame of a 1280x720 quicktime video. The frames are then read back and a new video is created from these. The problem is the large amount of data
I think I found the answer to my question. There is an \"fmacs\" instruction for VFP which may do the trick which does scalar computation on NEON/VFP registers.
When compiling this program with arm-elf-gcc-4.5 -O3 -march=armv7-a -mthumb -mfpu=neon -mfloat-abi=softfp:
Here is a C++ code: #define ARR_SIZE_TEST ( 8 * 1024 * 1024 ) void cpp_tst_add( unsigned* x, unsigned* y )
Learning about ARM NEON in开发者_运维知识库trinsics, I was timing a function that I wrote to double the elements in an array.The version that used the intrinsics takes more time than a plain C version
There is a similar post that covers regular registers. What about NEON registers. As far as I remember either top half or bottom half of registers have to be preserved across function calls.
I\'ve compiled ffmpeg code on android and able to play the video without neon support and for armv5te. Decoding is good, the video plays,but the problem is the frame rate is really really bad. I getti
I am trying to compile ffmpeg for android with neon support , but I am getting following assembler errors. Please let me know if anybody has any clue about this?
I have an ARGB pixel stored in an 128 bit NEON register as 32bit per channel. I ne开发者_如何学Ced to store this into memory as an 8bit channel ARGB (narrowing and saturating).
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