Bug#1126103: openblas: Incorrect dpotrf_ result caused by loongarch la464 kernels

[Miao Wang]

Source: openblas
Version: 0.3.30+ds-3
Severity: important
Tags: upstream, patch, ftbfs
Forwarded: https://github.com/OpenMathLib/OpenBLAS/issues/5602
Control: affects -1 src:xtb

dpotrf_ is giving wrong results with loongarch la464 kernels,
when running on loongarch CPUs with 32MB L3 cache, such as
3C6000. This is because the parameter *GEMM_R chosen for this
scenario is not correct.

When xtb is compiled on such machines, the self test of it will
fail, complaining the calculated result is not correct, resulting 
in FTBFS of it.

This bug has been fixed in commit 4001d7a74f78 ("Increase 
LA464/16MB DGEMM_R for minimal spacing of 64 to MAX(p,q)") and
I hope it can be applied in Debian.

Cheers,

Miao Wang