Re: [PATCH v2 0/6] s390x/tcg: Vector instruction fixes

[Cornelia Huck <cohuck@redhat.com>]

On Mon, 21 Oct 2019 10:57:09 +0200
David Hildenbrand <david@redhat.com> wrote:

> Ivan reported that a simple
>     $ go get -v -d github.com/FactomProject/factom
> 
> Will result in errors when vector instructions are in use. Turns out
> golang makes excessive use of vector instructions, e.g., for crypto, hashes
> but also basic math.
> 
> I tracked the involved vector instructions and started writing more
> tests for them (will upstream them once they are in a better shape). Turns
> out there are quite some issues remaining. golang uses instructions not
> yet used by the kernel or by glibc.
> 
> With these patches, "go get" works again. It wouldn't surprise me if there
> are more BUGs in the vector instructions. Will continue writing more tests.
> 
> Cc: Ivan Warren <ivan@vmfacility.fr>
> 
> v1 -> v2:
> - "s390x/tcg: Fix VECTOR SUBTRACT COMPUTE BORROW INDICATION"
> -- Fix by inverting the result
> - "s390x/tcg: Fix VECTOR SUBTRACT WITH BORROW INDICATION"
> -- Reuse gen_ac2_i64()
> - "s390x/tcg: Fix VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATION"
> -- Reuse gen_accc2_i64()
> - Ran against more tests
> 
> David Hildenbrand (6):
>   s390x/tcg: Fix VECTOR MULTIPLY LOGICAL ODD
>   s390x/tcg: Fix VECTOR MULTIPLY AND ADD *
>   s390x/tcg: Fix VECTOR SHIFT RIGHT ARITHMETIC BY BYTE
>   s390x/tcg: Fix VECTOR SUBTRACT COMPUTE BORROW INDICATION
>   s390x/tcg: Fix VECTOR SUBTRACT WITH BORROW INDICATION
>   s390x/tcg: Fix VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATION
> 
>  target/s390x/translate_vx.inc.c | 30 ++++++++++++------------------
>  target/s390x/vec_int_helper.c   | 18 ++++++++++--------
>  2 files changed, 22 insertions(+), 26 deletions(-)
> 

Thanks, applied.