[Qemu-devel] [PATCH v6 0/4] target/mips: Optimize MSA interleave instructions

[Mateja Marjanovic <mateja.marjanovic@rt-rk.com>]

From: Mateja Marjanovic <Mateja.Marjanovic@rt-rk.com>

Optimize MSA instructions ILVEV.<B|H|W|D>, ILVOD.<B|H|W|D>,
ILVL.<B|H|W|D> and ILVR.<B|H|W|D> using the hybrid approach,
MSA helpers in some cases and directly tcg registers in other
cases, so the performance would be better.

v6:
 - Add ILVL.<B|H|W|D> and ILVR.<B|H|W|D> MSA instructions
   with mixed approaches (with helpers and with tcg
   registers).
 - Test the performance for ILVL.<B|H|W|D> and
   ILVR.<B|H|W|D> MSA instructions, with helpers,
   with tcg and with the mixed approach.
 - Use a tcg register instead of an int variable for
   storing a constant value of the mask (for logic
   operations).
 - Eliminate some unnecessary tcg_gen calls.
 - Changes in commit messages and the cover letter.

v5:
 - Use tcg_gen_deposit function.
 - Added performance number for no-deposit and
   with-deposit cases of ILVEV.W.
 - Minor changes in commit messages and the cover letter.

v4:
 - Clean up typing errors.
 - Change the commit message and the cover letter.
 - Fix bug for ILVEV.D, in case where the destination
   and one of the sources are the same register.

v3:
 - Reduce the number of logic operations to a
   minimum.
 - Add comments.

v2:
 - Minor changes in commit messages and the cover letter.

Mateja Marjanovic (4):
  target/mips: Optimize ILVOD.<B|H|W|D> MSA instructions
  target/mips: Optimize ILVEV.<B|H|W|D> MSA instructions
  target/mips: Optimize ILVL.<B|H|W|D> MSA instructions
  target/mips: Optimize ILVR.<B|H|W|D> MSA instructions

 target/mips/helper.h     |   7 +-
 target/mips/msa_helper.c |  82 +++++---
 target/mips/translate.c  | 498 ++++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 547 insertions(+), 40 deletions(-)

-- 
2.7.4