Re: [Qemu-devel] [PATCH v1 00/33] s390x/tcg: Vector Instruction Support Part 1

[David Hildenbrand]

On 26.02.19 12:38, David Hildenbrand wrote:
> This is the first part of vector instruction support for s390x. Parts
> will be sent and reviewed piece by piece.
> 
> 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
>     https://github.com/cohuck/qemu/tree/s390-next
> 
> To make use of vector instructions on my branch, make sure to specify
> "-cpu max" for now.
> 
> 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, I have a growing set of tests for
> kvm-unit-tests which I cross-test on a real s390x system.
> 
> In this part, the basic infrastructure and all Vector Support Instructions
> introduced with the "Vector Facility" are added. The Vector Extension
> Facilities are not considered for now.
> 
> We make use of the existing gvec expansion + ool (out-of-line) support.
> This will be heavily used especially for part 2 (Integer Instructions)
> where we can actually reuse quite some existing gvec expansions.
> 

I'll most probably introduce and use something like

#define ES_8    MO_8
#define ES_16   MO_16
#define ES_32   MO_32
#define ES_64   MO_64
#define ES_128  4

That will make handling of ES_128 nicer

-- 

Thanks,

David / dhildenb