[PATCH 0/7] target/ppc: DFP fixes and improvements

[Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>]

This patchset fixes the DFP issue reported at https://bugs.launchpad.net/qemu/+bug/1841990
caused by the change in FP register storage in commit ef96e3ae96 "target/ppc:
move FP and VMX registers into aligned vsr register array" along with some
further tidy-up/improvements.

Patches 1 and 2 introduce get/set helper functions for reading and writing
DFP even-odd register pairs (rather than accessing the register pointers
directly) which then leads to the real fix in patch 3.

Following on from this patches 4 to 6 change the struct PPC_DFP internal
decimal representation from uint64[2] to ppc_vsr_t which enables us to use
the existing VsrD() macro to access the correct elements regardless of host
endian and remove the explicit HI_IDX and LO_IDX references.

Finally patch 7 simplifies the calls to set_dfp{64,128}() in DFP macros
which can now be generated directly by the preprocessor rather than requiring
an explicit if() statement.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>


Mark Cave-Ayland (7):
  target/ppc: introduce get_dfp{64,128}() helper functions
  target/ppc: introduce set_dfp{64,128}() helper functions
  target/ppc: update {get,set}_dfp{64,128}() helper functions to
    read/write DFP numbers correctly
  target/ppc: introduce dfp_finalize_decimal{64,128}() helper functions
  target/ppc: change struct PPC_DFP decimal storage from uint64[2] to
    ppc_vsr_t
  target/ppc: use existing VsrD() macro to eliminate HI_IDX and LO_IDX
    from dfp_helper.c
  target/ppc: remove unnecessary if() around calls to set_dfp{64,128}()
    in DFP macros

 target/ppc/cpu.h        |   1 +
 target/ppc/dfp_helper.c | 384 ++++++++++++++++++++--------------------
 target/ppc/helper.h     |   2 +-
 3 files changed, 193 insertions(+), 194 deletions(-)

-- 
2.20.1