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dfa5413966
Details: - Since the number of registers in NEON is large but their lengths are short, I'm here extending both MR and NR. - The approach is to represent the C microtile in registers optionally in columns, so for sizes like 6x7m, the 'crr' kernel is the default with 'rrr' supported through an in-register transpose. - A few asm kernels are crafted for 'rv' to complete this extended size support. - For 'rd' I'm still relying heavily on C99 intrinsic kernels with branching so the performance might not be optimal. (Sorry for that.) - So far, these changes only affect the 'firestorm' subconfig. - This commit also contains row-preferential s12x8 and d6x8 gemm ukernels. These microkernels are templatized versions of the existing s8x12 and d6x8 ukernels defined in bli_gemm_armv8a_asm_d6x8.c.
For more information on sub-configurations and configuration families in BLIS, please read the Configuration Guide, which can be viewed in markdown-rendered form from the BLIS wiki page.
If you don't have time, or are impatient, take a look at the config_registry
file in the top-level directory of the BLIS distribution. It contains a
grammar-like mapping of configuration names, or families, to sub-configurations,
which may be other families. Keep in mind that the / notation:
<config>: <config>/<name>
means that the kernel set associated with <name> should be made available to
the configuration <config> if <config> is targeted at configure-time.
(Some configurations borrow kernels from other configurations, and this is how
we specify that requirement.)