[Qemu-devel] [PATCH 00/13] ARM: Handle UNDEF cases in Neon data processing insns

[Peter Maydell]

This extremely dull patch set cleans up the UNDEF handling in the Neon
data processing instruction space, so that we UNDEF in all the cases where
the architecture demands it, and do so early enough that we don't leak
a TCG temporary in the process. It also fixes the handling of the
one UNPREDICTABLE in the space, and does some minor cleanup that is
possible once you know the UNDEF cases have been caught earlier.

The patchset is inspired by a number of patches from the qemu-meego
tree, although in most cases I ended up writing a more generic check
rather than using Juha's patches directly.

The order of patches matches the order in which disas_neon_data_insn()
handles the various subcases.

This has been tested via the usual random-instruction-sequence testing
with a set of patterns that cover all of the Neon dp insn space.
[This means that in the process I ended up also testing the actual
functionality of all the Neon dp insns; I only found one bug,
which I'll send a patch for in a moment.]

Juha Riihimäki (2):
  target-arm: Simplify three-register pairwise code
  target-arm: Handle UNDEF cases for VDUP (scalar)

Peter Maydell (11):
  target-arm: Use lookup table for size check on Neon 3-reg-same insns
  target-arm: Handle UNDEF cases for Neon 3-regs-same insns
  target-arm: Handle UNDEF cases for Neon "2 regs and shift" insns
  target-arm: Collapse VSRI case into VSHL,VSLI
  target-arm: Handle UNDEF cases for Neon invalid modified-immediates
  target-arm: Handle UNDEF cases for Neon 3-regs-different-widths
  target-arm: Handle UNDEF cases for Neon 2 regs + scalar forms
  target-arm: Handle UNDEF cases for VEXT
  target-arm: Simplify checking of size field in Neon 2reg-misc forms
  target-arm: Handle UNDEF cases for Neon 2 register misc forms
  target-arm: Treat UNPREDICTABLE VTBL,VTBX case as UNDEF

 target-arm/translate.c |  698 +++++++++++++++++++++++++++++++++---------------
 1 files changed, 483 insertions(+), 215 deletions(-)