[Qemu-devel] target-arm: aarch64: ask for suggestion, a few insn implementations for review.

[Dennis Lan (dlan)]

Hi Folks:
   I'm writing this letter mainly for help and suggestion.
   I'm using qemu-aarch64[1] from matz's repository, which actually is
not official.
with matz's repo, and trying to build a small gentoo rootfs, I
encountered a problem with gcc-4.9.0 and if only commit[2] is
included, I have reported to gcc upstream, for more information can be
found here[3]

   The problem is that there are still a few insn implementations
missing in matz's repo,
so I try to implement them myself[4]. I'm not familiar with qemu tcg,
so those patches probably more than a hack, it would be great if
anyone can help to review, whether I'm doing this correct or not (I'm
not seeking for upstreaming those patches).
   yes, I've seen aarch64's work is heading for upstream, and I jumped
a little ahead..
so, let me know what the best i can do.

Lan

[1] git://github.com/susematz/qemu.git , branch: aarch64-1.6

[2] commit from gcc-4.9.0
commit 07ca5686e64d32f7df4ccf4205d0b914f120da5e
Author: yroux <address@hidden>
Date:   Thu Sep 26 09:09:30 2013 +0000

    2013-09-26  Yvan Roux  <address@hidden>

        * config/aarch64/aarch64.opt (mlra): New option.
        * config/aarch64/aarch64.c (aarch64_lra_p): New function.
        (TARGET_LRA_P): Define.

    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/address@hidden
138bc75d-0d04-0410-961f-82ee72b054a4

[3] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59573

[4] aarch64 patches
 git://github.com/dlanx/qemu.git , branch: aarch64-1.6

      aarch64: Implement simd SHL immediate support
      aarch64: Enable NEG insn support which is already implemented
      aarch64: Enable USHL insn support which is already implemented
      aarch64: Implement CMEQ(zero) scalar insn