Thanks josh, Do you notice that the http://www.joshknows.com cannot be accessed today? I am within US.
B.R. Changchun (Alex) Zhang -----邮件原件----- 发件人: Josh Blum [mailto:[email protected]] 发送时间: Friday, January 27, 2012 12:56 PM 收件人: Alex 抄送: [email protected] 主题: Re: [Discuss-gnuradio]which architecture is used for SIMD optimized math blocks of gr-blocks > > I see that there are some work on the SIMD optimized math blocks in > gr-blocks. I am wondering what kind of computer is used for your test > regarding this SIMD optimization. > > Code has been re-based and moved to this branch, BTW: http://gnuradio.org/cgit/jblum.git/log/?h=new_blocks The for the floating point version of the multiplier, and adder blocks, and decimating FIR filter: the work function calls into a libvolk math kernel. Therefore, the new blocks are not architecture specific. Libvolk handles architecture selection and architecture-specific dispatching. In other words, libvolk is responsible for calling into a vectorized SIMD implementation that will operate on your architecture. For a given kernel, there is a generic implementation, and optionally, orc, sse*, neon, etc... To see if an optimized kernel is supported on you architecture, see the kernel's header in volk/include/volk/*.h If you have an x86 machine, most likely, there is already an sse* implementation of a particular kernel. -Josh _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
