[PATCH v2 0/2] target/ppc: Fix vextu[bhw][lr]x on big endian hosts

[matheus . ferst]

From: Matheus Ferst <matheus.ferst@eldorado.org.br>

The definition of struct Int128 is currently independent of the host
endianness, causing different results when using the member s128 of
union ppc_vsr_t in big-endian builds with CONFIG_INT128 or
!CONFIG_INT128.

The only PPC instructions that seem to be affected by this issue are the
"Vector Extract Unsigned Byte/Halfword/Word to GPR using GPR-specified
Left/Right-Index." Even on builds with Int128 support, however, their
helpers give the wrong result on big-endian hosts.

The first patch in this series changes the definition of struct Int128
to allow its use in the ppc_vsr_t union. The second patch fixes the
helper definition.

Matheus Ferst (2):
  include/qemu/int128.h: define struct Int128 according to the host
    endianness
  target/ppc: fix vextu[bhw][lr]x helpers

 include/qemu/int128.h   | 27 ++++++++++++++++++++-------
 target/ppc/int_helper.c | 38 ++++++++++----------------------------
 2 files changed, 30 insertions(+), 35 deletions(-)

-- 
2.25.1