Can there be something using pragma option to disable neon for each function?

发自我的 iPad

在 2011-5-7，上午1:29，David Gilbert david.gilbert@linaro.org 写道：

== Bug fighting ==

• Tracked bug 774175 (apt segfault on armel on oneiric) down to the

cortex-a8 branch erratum bug that we found as part of the bug jam a few weeks ago (affecting the more obscure vtk package) - Richard's existing binutils fix should fix this.

== String routines ==

• Struggled to get 'perf' to get sane results from profiling spec;

some of the samples are obviously being associated with the wrong process somewhere along the process (e.g. it's showing significant samples in the sh process but in a library that's used by the actual benchmark.

• latrace on spec still running on ursa2

• Wrote a non-neon memcpy; as expected it's aligned performance is

very similar to libc/kernel - it's a bit faster in some places but slower in some odd places (e.g. n*32+1 bytes is a lot slower for some reason). It's also really bad on mis-aligned cases, I tried to take advantage of the v7's ability to do misaligned loads - but they really are quite slow.

Dave

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