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arm64: NEON BFDOT sbgemm kernel for VORTEX (Apple M1-M3) sbgemm on the Apple targets so far ran the generic C fallback; with FEAT_BF16 (present at least since M2, probed at run time so older cores keep the fallback) the new kernel accumulates C in sixteen quad registers of eight columns by two row groups. One BFDOT does a two-wide dot per lane, so rows l and l+1 of the packed panels are zipped into the lane layout (i, k & 1); the B pair of a column is duplicated across the lanes and the A pairs cover four rows each. An odd k is a zero vector, blocks narrower than eight run in scalar code. With SBGEMM_UNROLL_M = SBGEMM_UNROLL_N the driver routes the A side through the O copies as well, so both panels come in the power-of-two grouping of #6142's copies, which this renames to role-based names (oncopy/otcopy for both sides, ncopy/tcopy kept for the M-side-only use of the M4 SME2 target). On an M3 Pro: 39116-case randomized sbgemm sweep against a double-precision reference passes unchanged, and against the generic fallback of develop the packed path is 34x at 1024^3 (57 vs 1.7 GFLOPS) and 63x at 2048x2048x1024 (114 vs 1.8 GFLOPS), about a quarter of the fp32 NEON sgemm of the same build.

0tomhoyt:sbgemm-bfdot

6 hours ago

Merge pull request #6105 from thrasibule/fix-default-allocator Default allocator speedup

develop

6 hours ago

change deprecated -pgf90libs flag to -fortranlibs flag for compatibility with future releases

cparrott73:develop

8 hours ago

martin-frbg:lapack1361

8 hours ago

Merge pull request #6137 from martin-frbg/lapack1428 Query SGELQF workspace in SGELSS like in D/C/ZGELSS (Reference-LAPACK PR 1428)

develop

10 hours ago

Merge pull request #6138 from martin-frbg/lapack1431 Fix out of bounds shift shuffle in S/DLAQZ0 (Reference-LAPACK PR 1431)

develop

12 hours ago

Preserve config.h timestamp when contents are unchanged Avoids unnecessary OpenBLAS rebuilds during reconfigure

birolcapa:patch-1

13 hours ago

Merge pull request #6139 from martin-frbg/lapack1426 Remove the LIWORKS and LDSWORKS checks from STRSYL3 (Reference-LAPACK PR 1426)

develop

14 hours ago

Latest Branches

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arm64: NEON BFDOT sbgemm kernel for VORTEX (Apple M1-M3)#6145

10 hours ago

fe87291

0tomhoyt:sbgemm-bfdot

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change deprecated -pgf90libs flag to -fortranlibs flag for compatibility with future releases#6144

17 hours ago

b829c63

cparrott73:develop

0%

ADD ?BDSVDMR3 - a MRRR-based bidiagonal SVD with DBDSDC safety fallback (Reference-LAPACK PR 1361)#6141

10 hours ago

4b2ecaa

martin-frbg:lapack1361

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