Re: [Qemu-devel] [PATCH v2 00/22] s390x/tcg: Vector Instruction Support Part 4

[David Hildenbrand <david@redhat.com>]

On 03.06.19 11:06, David Hildenbrand wrote:
> This is the final part of vector instruction support for s390x.
> 
> Part 1: Vector Support Instructions
> Part 2: Vector Integer Instructions
> Part 3: Vector String Instructions
> Part 4: Vector Floating-Point Instructions
> 
> The current state can be found at (kept updated):
>     https://github.com/davidhildenbrand/qemu/tree/vx
> 
> It is based on:
> - [PATCH v2 0/5] s390x/tcg: Vector Instruction Support Part 3
> - [PATCH v1 0/2] s390x: Fix vector register alignment
> 
> With the current state I can boot Linux kernel + user space compiled with
> SIMD support. This allows to boot distributions compiled exclusively for
> z13, requiring SIMD support. Also, it is now possible to build a complete
> kernel using rpmbuild as quite some issues have been sorted out.
> 
> While the current state works fine for me with RHEL 8, I am experiencing
> some issues with newer userspace versions. I already found and fixed
> some stack overflow protection issues (stfle instruction). I still see
> random rpm database corruptions and rpmbuild doesn't work correctly
> (looks like another stack protection issue).
> 
> In this part, all Vector Floating-Point Instructions introduced with the
> "Vector Facility" are added. Also, the "qemu" model is changed to a
> z13 machine.
> 
> v1 -> v2:
> - get rid of make_float64() and float64_val().
> - fixed two cc calculation issues (thanks Richard)
> - Rework "VECTOR FP COMPARE (EQUAL|HIGH|HIGH OR EQUAL)"
> - Rework "VECTOR FP MULTIPLY AND (ADD|SUBTRACT)"
> - Use gvec expansion in "s390x/tcg: Implement VECTOR FP PERFORM SIGN
>   OPERATION"
> 
> Cc: Denys Vlasenko <dvlasenk@redhat.com>
> Cc: Christian Borntraeger <borntraeger@de.ibm.com>
> Cc: Pino Toscano <ptoscano@redhat.com>
> 
> David Hildenbrand (22):
>   s390x/tcg: Store only the necessary amount of doublewords for STFLE
>   s390x/tcg: Introduce tcg_s390_vector_exception()
>   s390x/tcg: Export float_comp_to_cc() and float(32|64|128)_dcmask()
>   s390x/tcg: Implement VECTOR FP ADD
>   s390x/tcg: Implement VECTOR FP COMPARE (AND SIGNAL) SCALAR
>   s390x/tcg: Implement VECTOR FP COMPARE (EQUAL|HIGH|HIGH OR EQUAL)
>   s390x/tcg: Implement VECTOR FP CONVERT FROM FIXED 64-BIT
>   s390x/tcg: Implement VECTOR FP CONVERT FROM LOGICAL 64-BIT
>   s390x/tcg: Implement VECTOR FP CONVERT TO FIXED 64-BIT
>   s390x/tcg: Implement VECTOR FP CONVERT TO LOGICAL 64-BIT
>   s390x/tcg: Implement VECTOR FP DIVIDE
>   s390x/tcg: Implement VECTOR LOAD FP INTEGER
>   s390x/tcg: Implement VECTOR LOAD LENGTHENED
>   s390x/tcg: Implement VECTOR LOAD ROUNDED
>   s390x/tcg: Implement VECTOR FP MULTIPLY
>   s390x/tcg: Implement VECTOR FP MULTIPLY AND (ADD|SUBTRACT)
>   s390x/tcg: Implement VECTOR FP PERFORM SIGN OPERATION
>   s390x/tcg: Implement VECTOR FP SQUARE ROOT
>   s390x/tcg: Implement VECTOR FP SUBTRACT
>   s390x/tcg: Implement VECTOR FP TEST DATA CLASS IMMEDIATE
>   s390x/tcg: Allow linux-user to use vector instructions
>   s390x/tcg: We support the Vector Facility
> 
>  target/s390x/Makefile.objs      |   1 +
>  target/s390x/cpu.c              |   3 +
>  target/s390x/cpu.h              |   1 +
>  target/s390x/excp_helper.c      |  15 +
>  target/s390x/fpu_helper.c       |   4 +-
>  target/s390x/gen-features.c     |   1 +
>  target/s390x/helper.h           |  46 +++
>  target/s390x/insn-data.def      |  45 +++
>  target/s390x/internal.h         |   4 +
>  target/s390x/misc_helper.c      |   8 +-
>  target/s390x/tcg_s390x.h        |   2 +
>  target/s390x/translate_vx.inc.c | 284 +++++++++++++++
>  target/s390x/vec_fpu_helper.c   | 625 ++++++++++++++++++++++++++++++++
>  13 files changed, 1036 insertions(+), 3 deletions(-)
>  create mode 100644 target/s390x/vec_fpu_helper.c
> 

Still tired, the unchanged patch

"[PATCH v1 23/23] s390x: Bump the "qemu" CPU model up to a stripped-down
z13"

is missing from this series (already reviewed by Richard)

-- 

Thanks,

David / dhildenb