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

[Richard Henderson]

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(-)

-- 
1.8.1.4