[Qemu-devel] [PATCH v3 00/20] tcg-arm improvements

[Richard Henderson <rth@twiddle.net>]

Changes v2-v3:
  * Patch 16 is an important bug fix.  For helpers with more than 4 arguments,
    we were clobbering the register save area.  The patch as written is
    difficult to disentangle from the rest of the series, but I think that
    a similar patch should be written for stable.

    I have no idea how we aren't just seeing crashes everywhere without this.

  * The softmmu code is improved, using a tidier insn schedule and making
    use of the out-of-line ldst feature.

  * Always use blx for calls when we have movw+movt.  BLX is predicted as
    a call wrt the branch prediction stack, where a ldr into the pc isn't.
    At least as documented for the A9.


r~


Richard Henderson (20):
  tcg-arm: Use bic to implement and with constant
  tcg-arm: Handle negated constant arguments to and/sub
  tcg-arm: Allow constant first argument to sub
  tcg-arm: Use tcg_out_dat_rIN for compares
  tcg-arm: Handle constant arguments to add2/sub2
  tcg-arm: Improve constant generation
  tcg-arm: Fold epilogue into INDEX_op_exit_tb
  tcg-arm: Implement deposit for armv7
  tcg-arm: Implement division instructions
  tcg-arm: Use TCG_REG_TMP name for the tcg temporary
  tcg-arm: Use R12 for the tcg temporary
  tcg-arm: Cleanup multiply subroutines
  tcg-arm: Cleanup tcg_out_goto_label
  tcg-arm: Cleanup goto_tb handling
  tcg-arm: Cleanup most primitive load store subroutines
  tcg-arm: Fix local stack frame
  tcg-arm: Split out tcg_out_tlb_read
  tcg-arm: Improve scheduling of tcg_out_tlb_read
  tcg-arm: Use movi32 + blx for calls on v7
  tcg-arm: Convert to CONFIG_QEMU_LDST_OPTIMIZATION

 configure               |    2 +-
 disas/arm.c             |    4 +
 include/exec/exec-all.h |   40 +-
 tcg/arm/tcg-target.c    | 1506 ++++++++++++++++++++++++++---------------------
 tcg/arm/tcg-target.h    |   14 +-
 translate-all.c         |    2 -
 6 files changed, 869 insertions(+), 699 deletions(-)

-- 
1.8.1.4