[PATCH v4 00/26] s390x/tcg: Implement Vector enhancements facility and switch to z14

[David Hildenbrand]

@Conny, I think this should be good to go.


This series adds support for the "Vector enhancements facility" and bumps
the qemu CPU model to a stripped-down z14.

I tested most vector FP instructions by generating random instructions
and vectors, comparing the result with results on actual hardware. I did
not test instructions/instruction variants with (partial) undeterministic
behavior and exception handling.

Linux' also seems to boot/work fine with it. Howeever, while testing this
series I noticed that Linux checks for the wrong facility bit - see [1].
I tested by temporarily faking availability of the "wrong" facility bit.

[1] https://lkml.kernel.org/r/20210503121244.25232-1-david@redhat.com

v3 -> v4:
- "s390x/tcg: Implement VECTOR FP (MAXIMUM|MINIMUM)"
-- Move "const bool ..." into respective blocks
- "linux-user: elf: s390x: Prepare for Vector enhancements facility"
-- Add all currently defined Linux HWCAP.

v2 -> v3:
- "s390x/tcg: Fix FP CONVERT TO (LOGICAL) FIXED NaN handling"
-- Keep proper signal handling in the VECTOR variants
- "s390x/tcg: Simplify vop64_2() handling"
-- uint64_t se -> bool se
- "s390x/tcg: Implement VECTOR FP (MAXIMUM|MINIMUM)"
-- Drop special cases when both values are infinity
-- Simplify cases when both values are zero
-- Simplify dcmask handling
-- uint64_t se -> bool se
- "linux-user: elf: Prepare for Vector enhancements facility"
-- Added to properly indicate the new elf capability

v1 -> v2:
- Too much changed to spell it out explicitly. Mostly addressed feedback
  from Richard, a couple of bugfixes found while testing, and some
  simplifications/cleanups.
- Rebased on top of Richard's softfloat rework

Cc: qemu-s390x@nongnu.org
Cc: Cornelia Huck <cohuck@redhat.com>
Cc: Halil Pasic <pasic@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Thomas Huth <thuth@redhat.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Laurent Vivier <laurent@vivier.eu>


David Hildenbrand (26):
  s390x/tcg: Fix FP CONVERT TO (LOGICAL) FIXED NaN handling
  s390x/tcg: Fix instruction name for VECTOR FP LOAD
    (LENGTHENED|ROUNDED)
  s390x/tcg: Simplify vop64_3() handling
  s390x/tcg: Simplify vop64_2() handling
  s390x/tcg: Simplify vfc64() handling
  s390x/tcg: Simplify vftci64() handling
  s390x/tcg: Simplify vfma64() handling
  s390x/tcg: Simplify vfll32() handling
  s390x/tcg: Simplify vflr64() handling
  s390x/tcg: Simplify wfc64() handling
  s390x/tcg: Implement VECTOR BIT PERMUTE
  s390x/tcg: Implement VECTOR MULTIPLY SUM LOGICAL
  s390x/tcg: Implement 32/128 bit for VECTOR FP
    (ADD|DIVIDE|MULTIPLY|SUBTRACT)
  s390x/tcg: Implement 32/128 bit for VECTOR (LOAD FP INTEGER|FP SQUARE
    ROOT)
  s390x/tcg: Implement 32/128 bit for VECTOR FP COMPARE *
  s390x/tcg: Implement 32/128 bit for VECTOR FP COMPARE (AND SIGNAL)
    SCALAR
  s390x/tcg: Implement 64 bit for VECTOR FP LOAD LENGTHENED
  s390x/tcg: Implement 128 bit for VECTOR FP LOAD ROUNDED
  s390x/tcg: Implement 32/128 bit for VECTOR FP PERFORM SIGN OPERATION
  s390x/tcg: Implement 32/128 bit for VECTOR FP TEST DATA CLASS
    IMMEDIATE
  s390x/tcg: Implement 32/128 bit for VECTOR FP MULTIPLY AND
    (ADD|SUBTRACT)
  s390x/tcg: Implement VECTOR FP NEGATIVE MULTIPLY AND (ADD|SUBTRACT)
  s390x/tcg: Implement VECTOR FP (MAXIMUM|MINIMUM)
  linux-user: elf: s390x: Prepare for Vector enhancements facility
  s390x/tcg: We support Vector enhancements facility
  s390x/cpumodel: Bump up QEMU model to a stripped-down IBM z14 GA2

 hw/s390x/s390-virtio-ccw.c      |    3 +
 include/elf.h                   |    7 +
 linux-user/elfload.c            |    1 +
 target/s390x/cpu_models.c       |    4 +-
 target/s390x/fpu_helper.c       |   41 +-
 target/s390x/gen-features.c     |   14 +-
 target/s390x/helper.h           |   70 +-
 target/s390x/insn-data.def      |   16 +-
 target/s390x/internal.h         |    9 +
 target/s390x/translate_vx.c.inc |  633 ++++++++++++++----
 target/s390x/vec_fpu_helper.c   | 1079 ++++++++++++++++++++++---------
 target/s390x/vec_helper.c       |   22 +
 12 files changed, 1428 insertions(+), 471 deletions(-)

-- 
2.31.1