[PATCH v2 00/17] target/arm: Convert rest of Neon 3-reg-same to decodetree

[Peter Maydell <peter.maydell@linaro.org>]

This patchset is v2 of the Neon decodetree conversion. The first
half of v1 is in master already, so we're left just with patches
converting the rest of the 3-reg-same Neon dp insn group.

Based-on: <20200508152200.6547-1-richard.henderson@linaro.org>
("[PATCH v3 00/16] target/arm: partial vector cleanup")
Strictly speaking, based on that with a fixup for the VRSRA bug,
but I think patchew should be placated by that based-on tag.

Git tree available at:
 https://git.linaro.org/people/peter.maydell/qemu-arm.git neon-decodetree
with the whole patchstack including RTH's series.

Changes from v1:
 * the first 19 or so patches have been upstreamed
 * patch 1 (VQRDMLAH/VQRDMLSH) uses do_3same() now
 * patch 3 (64-bit elt 3-reg-same): shifts now use a format
   which swaps Vn and Vm in decode, so we don't need to special
   case them in the C code. We also use the gvec interface
   rather than hand-rolling a for-each-pass loop.
 * patch 4: make DO_3SAME_32() handle just one trans fn rather
   than doing both _U and _S in one macro invocation.
   Use gvec rather than hand-rolling the for-each-pass loop.
   patch 5: (vaba/vabd): new, since rth's patchset rewrote how these
   were handled and they can now just be handled via DO_3SAME_NO_SZ_3()
 * patch 7: saturating shift handling rewritten to use the gvec APIs.
 * patch 10 (vqdmulh/vqrdmulh): rewritten to use gvec
 * patch 11 (vadd/vsub): rewritten to use gvec; vabd now in an earlier
   patch with vaba
 * patch 13 (vmul/vmla/vmls): vmul uses gvec; do_3same_fp() and
   DO_3S_FP() now added in this patch as it is the first user
 * new patch 15 making recps_f32 and rsqrts_f32 easier to use with
   common gvec APIs and macros by moving the 'env' argument to the front
 * patch 16: updated VRECPS/VRSQRTS code to use gvec

NB: I have not attempted to merge VQSHL_S and VQSHL_S64 into
one pattern in patch 7 (as suggested in review of v1) -- adding
yet another DO_3SAME_FOO for the case of "64 bit and 32 bit
can be done with same trans/gen fn" didn't seem worthwhile.

thanks
-- PMM

Peter Maydell (17):
  target/arm: Convert Neon 3-reg-same VQRDMLAH/VQRDMLSH to decodetree
  target/arm: Convert Neon 3-reg-same SHA to decodetree
  target/arm: Convert Neon 64-bit element 3-reg-same insns
  target/arm: Convert Neon VHADD 3-reg-same insns
  target/arm: Convert Neon VABA/VABD 3-reg-same to decodetree
  target/arm: Convert Neon VRHADD, VHSUB 3-reg-same insns to decodetree
  target/arm: Convert Neon VQSHL, VRSHL, VQRSHL 3-reg-same insns to
    decodetree
  target/arm: Convert Neon VPMAX/VPMIN 3-reg-same insns to decodetree
  target/arm: Convert Neon VPADD 3-reg-same insns to decodetree
  target/arm: Convert Neon VQDMULH/VQRDMULH 3-reg-same to decodetree
  target/arm: Convert Neon VADD, VSUB, VABD 3-reg-same insns to
    decodetree
  target/arm: Convert Neon VPMIN/VPMAX/VPADD float 3-reg-same insns to
    decodetree
  target/arm: Convert Neon fp VMUL, VMLA, VMLS 3-reg-same insns to
    decodetree
  target/arm: Convert Neon 3-reg-same compare insns to decodetree
  target/arm: Move 'env' argument of recps_f32 and rsqrts_f32 helpers to
    usual place
  target/arm: Convert Neon fp VMAX/VMIN/VMAXNM/VMINNM/VRECPS/VRSQRTS to
    decodetree
  target/arm: Convert NEON VFMA, VFMS 3-reg-same insns to decodetree

 target/arm/helper.h             |   7 +-
 target/arm/neon-dp.decode       | 113 +++++-
 target/arm/neon_helper.c        |   7 -
 target/arm/translate-neon.inc.c | 639 ++++++++++++++++++++++++++++++++
 target/arm/translate.c          | 495 +------------------------
 target/arm/vec_helper.c         |   7 +
 target/arm/vfp_helper.c         |   4 +-
 7 files changed, 767 insertions(+), 505 deletions(-)

-- 
2.20.1