On Mon, Aug 1, 2016 at 5:08 PM, David Seifert <s...@gentoo.org> wrote: > Dear friends, > while version bumping sci-libs/fftw, I've noticed our CPU_FLAGS_X86 > list could be expanded a bit: > > avx512 - introduced with Skylake and Knights Landing
According to Wikipedia, "AVX-512 consists of multiple extensions not all meant to be supported by all processors implementing them." https://en.wikipedia.org/wiki/AVX-512 https://en.wikipedia.org/wiki/CPUID#EAX.3D7.2C_ECX.3D0:_Extended_Features > I also propose creating a CPU_FLAGS_PPC variable containing (at least): > > altivec - PowerPC's SSE I see this one exists in use.desc. > vsx - PowerPC's AVX I don't see any ebuids using this. > Finally, I also propose creating CPU_FLAGS_ARM variable containing: > > neon > > Any ideas? Currently cpu-feature flags for non-x86 are package local, > whereas making them globally available makes masking easier for non- > applicable archs etc. and makes enabling them easier for users. It seems strange to create a USE_EXPAND variable with exactly one value.
