[PATCH, AArch64 v2 00/11] LSE atomics out-of-line

[Richard Henderson <richard dot henderson at linaro dot org>]

Changes since v1:
  * Use config/t-slibgcc-libgcc instead of gcc.c changes.
  * Some style fixes.
  * Ifdefs to work with old glibc.

  * Force TImode registers into even regnos.
    Required by CASP, allowed by the ABI, and is seen as the
    simplier solution than adding two new register classes.

  * Use match_dup instead of matching constraints for CAS{P}.
    Matching constraints result in lots of extraneous moves
    for TImode, and keeping the expander interface the same
    for non-TImode simplifies the code.


r~


Richard Henderson (11):
  aarch64: Simplify LSE cas generation
  aarch64: Improve cas generation
  aarch64: Improve swp generation
  aarch64: Improve atomic-op lse generation
  aarch64: Emit LSE st<op> instructions
  Add visibility to libfunc constructors
  aarch64: Add out-of-line functions for LSE atomics
  aarch64: Implement -matomic-ool
  aarch64: Force TImode values into even registers
  aarch64: Implement TImode compare-and-swap
  Enable -matomic-ool by default

 gcc/config/aarch64/aarch64-protos.h           |  20 +-
 gcc/optabs-libfuncs.h                         |   2 +
 gcc/common/config/aarch64/aarch64-common.c    |   6 +-
 gcc/config/aarch64/aarch64.c                  | 494 +++++++-------
 gcc/optabs-libfuncs.c                         |  26 +-
 .../atomic-comp-swap-release-acquire.c        |   2 +-
 .../gcc.target/aarch64/atomic-inst-ldadd.c    |  18 +-
 .../gcc.target/aarch64/atomic-inst-ldlogic.c  |  54 +-
 .../gcc.target/aarch64/atomic-op-acq_rel.c    |   2 +-
 .../gcc.target/aarch64/atomic-op-acquire.c    |   2 +-
 .../gcc.target/aarch64/atomic-op-char.c       |   2 +-
 .../gcc.target/aarch64/atomic-op-consume.c    |   2 +-
 .../gcc.target/aarch64/atomic-op-imm.c        |   2 +-
 .../gcc.target/aarch64/atomic-op-int.c        |   2 +-
 .../gcc.target/aarch64/atomic-op-long.c       |   2 +-
 .../gcc.target/aarch64/atomic-op-relaxed.c    |   2 +-
 .../gcc.target/aarch64/atomic-op-release.c    |   2 +-
 .../gcc.target/aarch64/atomic-op-seq_cst.c    |   2 +-
 .../gcc.target/aarch64/atomic-op-short.c      |   2 +-
 .../aarch64/atomic_cmp_exchange_zero_reg_1.c  |   2 +-
 .../atomic_cmp_exchange_zero_strong_1.c       |   2 +-
 .../gcc.target/aarch64/sync-comp-swap.c       |   2 +-
 .../gcc.target/aarch64/sync-op-acquire.c      |   2 +-
 .../gcc.target/aarch64/sync-op-full.c         |   2 +-
 libgcc/config/aarch64/lse.c                   | 282 ++++++++
 gcc/config/aarch64/aarch64.opt                |   4 +
 gcc/config/aarch64/atomics.md                 | 608 ++++++++++--------
 gcc/config/aarch64/iterators.md               |   8 +-
 gcc/config/aarch64/predicates.md              |  12 +
 gcc/doc/invoke.texi                           |  14 +-
 libgcc/config.host                            |   4 +
 libgcc/config/aarch64/t-lse                   |  48 ++
 32 files changed, 1058 insertions(+), 576 deletions(-)
 create mode 100644 libgcc/config/aarch64/lse.c
 create mode 100644 libgcc/config/aarch64/t-lse

-- 
2.17.1