Actually parse flags from cpuinfo to avoid mistakenly matching
substrings in cpuinfo that happen to match a flags.
Some features were only exposed in recent versions of Linux. Don't
require them to appear in cpuinfo on old versions of Linux.
Move PREFETCHWT1 back to parse only features. It isn't actually exposed
in Linux yet. Move SDBG to shown features. It has been visible since
Linux 4.3.
PiperOrigin-RevId: 219381731
Change-Id: Ied7c0ee7c8a9879683e81933de56c9074b01108f
Extend the cpuid package to parse and emulate cpuid features that exist
only on AMD and not Intel. The least straightforward part of this is
that AMD duplicates several block 1 features in block 6. Thus we ignore
those features when parsing block 6 and add them when emulating.
PiperOrigin-RevId: 218935032
Change-Id: Id41bf1c24720b0d9b968e2c19ab5bc00a6d62bd4
Linux added these block 3 features to the end of /proc/cpuinfo in
dfb4a70f20c5b3880da56ee4c9484bdb4e8f1e65.
This also fixes that block 3 features were completely missing from
FeatureSet.FlagsString(false) because FlagsString only prints Linux
blocks regardless of the cpuinfo option.
PiperOrigin-RevId: 218913816
Change-Id: I2f9c38c7c9da4b247a140877d4aca782e80684bd
We have been unnecessarily creating too many savable types implicitly.
PiperOrigin-RevId: 206334201
Change-Id: Idc5a3a14bfb7ee125c4f2bb2b1c53164e46f29a8