Details:
- Added a new sub-configuration 'cortexa53', which is a mirror image
of cortexa57 except that it will use slightly different compiler
flags. Thanks to Mathieu Poumeyrol for making this suggestion after
discovering that the compiler flags being used by cortexa57 were
not working properly in certain OS X environments (the fix to which
is currently pending in pull request #245).
Details:
- Removed four trailing spaces after "BLIS" that occurs in most files'
commented-out license headers.
- Added UT copyright lines to some files. (These files previously had
only AMD copyright lines but were contributed to by both UT and AMD.)
- In some files' copyright lines, expanded 'The University of Texas' to
'The University of Texas at Austin'.
- Fixed various typos/misspellings in some license headers.
Details:
- Updated/clarified the ARM preprocessor macro branch of bli_cpuid.c.
Going forward, cortexa57 (64-bit), cortexa15, and cortexa9 (32-bit)
sub-configurations are supported. However, the functions that detect
features specific to a15 and a9 are identical, and since a15 is tested
first, it will always be chosen for arm32 hardware (even if both
sub-configurations were enabled at configure-time and the library is
linked and run on an a9). Thus, more work needs to be done to
distinguish these two.
- Added cpp guard around x86_64 portions of bli_cpuid.c. Now, either
the x86_64 or ARM code will be compiled (or neither, if neither
environment is detected).
- In bli_arch_query_id(), call bli_cpuid_query_id() when the
BLIS_FAMILY_ARM64 or BLIS_FAMILY_ARM32 macros are defined.
- Added arm64 and arm32 configuration families to config_registry.
- Added a note to the arch_t typedef enum in bli_type_defs.h reminding
the developer to update the string array in bli_arch.c whenever new
enum values are added or existing values are reordered.
Details:
- Added runtime support for selecting an appropriate arch_t value based
on the results of the cpuid instruction (for x86_64). This allows
deferral of choosing a context (kernels, blocksizes, etc.) until
runtime, which allows BLIS to be built with support for multiple
microarchitectures. Currently, only amd64 and intel64 configurations
are registered in the config_registry; however, one could create
custom configuration families to support arbitrary sets of x86_64
microarchitectures.
- Current Intel microarchitectures supported via cpuid are knl, haswell,
sandybridge, and penryn.
- Current AMD microarchitectures supported via cpuid are: zen, excavator,
steamroller, piledriver, and bulldozer.
