Re: [Qemu-devel] [PATCH v2] SPARC: Add and use CPU_FEATURE_CASA

[Sebastian Huber <sebastian.huber@embedded-brains.de>]

Hello,

would someone please have a look at this.

On 2013-11-28 11:27, Sebastian Huber wrote:
> The LEON3 processor has support for the CASA instruction which is
> normally only available for SPARC V9 processors.  Binutils 2.24
> and GCC 4.9 will support this instruction for LEON3.  GCC uses it to
> generate C11 atomic operations.
>
> The CAS synthetic instruction uses an ASI of 0x80.  If TARGET_SPARC64 is
> not defined use a supervisor data load/store for an ASI of 0x80 in
> helper_ld_asi()/helper_st_asi().
> ---
>   target-sparc/cpu.c         |    3 +-
>   target-sparc/cpu.h         |    4 ++-
>   target-sparc/helper.h      |    4 ++-
>   target-sparc/ldst_helper.c |   28 +++++++++++++++-----------
>   target-sparc/translate.c   |   47 ++++++++++++++++++++++++++++---------------
>   5 files changed, 54 insertions(+), 32 deletions(-)


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