Re: [Qemu-devel] [PATCH 0/5] tcg-arm: Runtime detection of architecture

[Richard Henderson]

Ping.


On 06/06/2013 11:05 AM, Richard Henderson wrote:
> Two prepatory generic tcg patches, to allow non-constant values for
> the various TCG_TARGET_HAS_foo macros.
> 
> When in patch 3 this gets used, the code inlined in the translators
> will be able to check the relevant variable and emit either division
> opcode or the call to the division subroutine.
> 
> Perhaps more valuable is being able to generate armv7 insns when
> running on e.g. an cortex-a15, even when the OS distribution is
> built for a more generic armv5.
> 
> Tested on an a15, and with various hacks to force each of the unused
> code paths to be used.
> 
> 
> r~
> 
> 
> Richard Henderson (5):
>   tcg: Allow non-constant control macros
>   tcg: Simplify logic using TCG_OPF_NOT_PRESENT
>   tcg-arm: Make use of conditional availability of opcodes for divide
>   tcg-arm: Simplify logic in detecting the ARM ISA in use
>   tcg-arm: Use AT_PLATFORM to detect the host ISA
> 
>  tcg/arm/tcg-target.c | 82 
> +++++++++++++++++++++++++++-------------------------
>  tcg/arm/tcg-target.h | 14 +++++----
>  tcg/tcg-opc.h        | 28 ++++++++++--------
>  tcg/tcg.c            |  4 +--
>  tcg/tcg.h            |  3 +-
>  5 files changed, 69 insertions(+), 62 deletions(-)
>