Implement Vector-Enhancements Facility 2 for s390x

resolves: https://gitlab.com/qemu-project/qemu/-/issues/738

implements:
    VECTOR LOAD ELEMENTS REVERSED               (VLER)
    VECTOR LOAD BYTE REVERSED ELEMENTS          (VLBR)
    VECTOR LOAD BYTE REVERSED ELEMENT           (VLEBRH, VLEBRF, VLEBRG)
    VECTOR LOAD BYTE REVERSED ELEMENT AND ZERO  (VLLEBRZ)
    VECTOR LOAD BYTE REVERSED ELEMENT AND REPLICATE (VLBRREP)
    VECTOR STORE ELEMENTS REVERSED              (VSTER)
    VECTOR STORE BYTE REVERSED ELEMENTS         (VSTBR)
    VECTOR STORE BYTE REVERSED ELEMENTS         (VSTEBRH, VSTEBRF, VSTEBRG)
    VECTOR SHIFT LEFT DOUBLE BY BIT             (VSLD)
    VECTOR SHIFT RIGHT DOUBLE BY BIT            (VSRD)
    VECTOR STRING SEARCH                        (VSTRS)

    modifies:
    VECTOR FP CONVERT FROM FIXED                (VCFPS)
    VECTOR FP CONVERT FROM LOGICAL              (VCFPL)
    VECTOR FP CONVERT TO FIXED                  (VCSFP)
    VECTOR FP CONVERT TO LOGICAL                (VCLFP)
    VECTOR SHIFT LEFT                           (VSL)
    VECTOR SHIFT RIGHT ARITHMETIC               (VSRA)
    VECTOR SHIFT RIGHT LOGICAL                  (VSRL)


David Miller (9):
  tcg: Implement tcg_gen_{h,w}swap_{i32,i64}
  target/s390x: vxeh2: vector convert short/32b
  target/s390x: vxeh2: vector string search
  target/s390x: vxeh2: Update for changes to vector shifts
  target/s390x: vxeh2: vector shift double by bit
  target/s390x: vxeh2: vector {load, store} elements reversed
  target/s390x: vxeh2: vector {load, store} byte reversed elements
  target/s390x: vxeh2: vector {load, store} byte reversed element
  target/s390x: add S390_FEAT_VECTOR_ENH2 to qemu CPU model
  tests/tcg/s390x: Tests for Vector Enhancements Facility 2
  target/s390x: Fix writeback to v1 in helper_vstl

Richard Henderson (2):
  tcg: Implement tcg_gen_{h,w}swap_{i32,i64}
  target/s390x: Fix writeback to v1 in helper_vstl

 include/tcg/tcg-op.h                 |   6 +
 target/s390x/gen-features.c          |   2 +
 target/s390x/helper.h                |  13 +
 target/s390x/tcg/insn-data.def       |  40 ++-
 target/s390x/tcg/translate.c         |   3 +-
 target/s390x/tcg/translate_vx.c.inc  | 463 ++++++++++++++++++++++++---
 target/s390x/tcg/vec_fpu_helper.c    |  31 ++
 target/s390x/tcg/vec_helper.c        |   2 -
 target/s390x/tcg/vec_int_helper.c    |  55 ++++
 target/s390x/tcg/vec_string_helper.c |  99 ++++++
 tcg/tcg-op.c                         |  30 ++
 tests/tcg/s390x/Makefile.target      |   8 +
 tests/tcg/s390x/vxeh2_vcvt.c         |  97 ++++++
 tests/tcg/s390x/vxeh2_vlstr.c        | 146 +++++++++
 tests/tcg/s390x/vxeh2_vs.c           |  91 ++++++
 15 files changed, 1031 insertions(+), 55 deletions(-)
 create mode 100644 tests/tcg/s390x/vxeh2_vcvt.c
 create mode 100644 tests/tcg/s390x/vxeh2_vlstr.c
 create mode 100644 tests/tcg/s390x/vxeh2_vs.c

-- 
2.34.1