On Tue, 5 Apr 2016 08:26:38 -0400 "Lennart Sorensen" <lsore...@csclub.uwaterloo.ca> wrote:
> On Tue, Apr 05, 2016 at 08:20:54PM +0900, Mizuki Asakura wrote: > > > This code is not just there for prefetching. It is an example of > > > using software pipelining: > > > > OK. I understand. > > But the code is very hard to maintain... I've met too many register > > conflictions. > > # q2 and d2 were used in a same sequence. It cannot be exist in > > aarch64-neon. > > > > Anyway, I'll try to remove unnecessary register copies as you've suggested. > > After that, I'll also tryh to make benchmarks that > > * advance vs none > > * L1 / L2 / L3 (Cortex-A53 doesn't have), keep / strm > > to find the better configuration. > > > > But it is only a result of Cortex-A53 (that you ane me have). Does anyone > > can > > test other (expensive :) aarch64 environment ? > > (Cortex-Axx, Apple Ax, NVidia Denver, etc, etc...) > > If someone can list what to run for a test I can probably run it on an A57. Hi Lennart, This is great, thanks. Could you please clone the following branch? https://cgit.freedesktop.org/~siamashka/pixman/log/?h=20160405-separable-neon-bilinear-test And then try to compile static 32-bit pixman test programs using an ARM crosscompiler? ./autogen.sh ./configure --host=arm-linux-gnueabihf --enable-static-testprogs \ --disable-libpng --disable-gtk make Then run the "scaling-bench" program from the "test" directory on your A57 device? PIXMAN_DISABLE="" ./scaling-bench > cortex-a57-neon-single-pass.txt PIXMAN_DISABLE="wholeops" ./scaling-bench > cortex-a57-neon-separable.txt This information can be used to see whether the Cortex-A57 fits a common pattern observed with other ARM processors: https://people.freedesktop.org/~siamashka/files/20160405-arm-bilinear/ I suspect that it will show results similar to Cortex-A15, but we will never know until we try. This can help to identify an optimal bilinear scaling strategy. And also decide which parts of the existing 32-bit ARM assembly code are worth converting to AArch64. -- Best regards, Siarhei Siamashka _______________________________________________ Pixman mailing list Pixman@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/pixman