Marius Hillenbrand
e2828e30aa
Improve performance of SGEMM and DGEMM on z14 and z15 by unrolling and interleaving the inner loop of the SGEMM 16x4 and DGEMM 8x4 blocks. Specifically, we explicitly interleave vector register loads and computation of two iterations. Note that this change only adds one C function, since SGEMM 16x4 and DGEMM 8x4 actually map to the same C code: they both hold intermediate results in a 4x4 grid of vector registers, and the C implementation is built around that. Signed-off-by: Marius Hillenbrand <mhillen@linux.ibm.com>