diff options
| author | Torvald Riegel <torvald@gcc.gnu.org> | 2017-02-01 17:21:59 +0000 |
|---|---|---|
| committer | Torvald Riegel <torvald@gcc.gnu.org> | 2017-02-01 17:21:59 +0000 |
| commit | 969a32ce9354585f5f2b89df2e025f52eb0e1644 (patch) | |
| tree | ba5dc4787f7d4f9d23224810508207f4fcc188dc /libatomic/ChangeLog | |
| parent | 55e75c7c6bcfe386d0ecbf4611cff81040af00b3 (diff) | |
Fix __atomic to not implement atomic loads with CAS.
gcc/
* builtins.c (fold_builtin_atomic_always_lock_free): Make "lock-free"
conditional on existance of a fast atomic load.
* optabs-query.c (can_atomic_load_p): New function.
* optabs-query.h (can_atomic_load_p): Declare it.
* optabs.c (expand_atomic_exchange): Always delegate to libatomic if
no fast atomic load is available for the particular size of access.
(expand_atomic_compare_and_swap): Likewise.
(expand_atomic_load): Likewise.
(expand_atomic_store): Likewise.
(expand_atomic_fetch_op): Likewise.
* testsuite/lib/target-supports.exp
(check_effective_target_sync_int_128): Remove x86 because it provides
no fast atomic load.
(check_effective_target_sync_int_128_runtime): Likewise.
libatomic/
* acinclude.m4: Add #define FAST_ATOMIC_LDST_*.
* auto-config.h.in: Regenerate.
* config/x86/host-config.h (FAST_ATOMIC_LDST_16): Define to 0.
(atomic_compare_exchange_n): New.
* glfree.c (EXACT, LARGER): Change condition and add comments.
From-SVN: r245098
Diffstat (limited to 'libatomic/ChangeLog')
| -rw-r--r-- | libatomic/ChangeLog | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libatomic/ChangeLog b/libatomic/ChangeLog index 1b47b8f2235..d2b83369b74 100644 --- a/libatomic/ChangeLog +++ b/libatomic/ChangeLog @@ -1,3 +1,12 @@ +2017-02-01 Richard Henderson <rth@redhat.com> + Torvald Riegel <triegel@redhat.com> + + * acinclude.m4: Add #define FAST_ATOMIC_LDST_*. + * auto-config.h.in: Regenerate. + * config/x86/host-config.h (FAST_ATOMIC_LDST_16): Define to 0. + (atomic_compare_exchange_n): New. + * glfree.c (EXACT, LARGER): Change condition and add comments. + 2017-01-30 Szabolcs Nagy <szabolcs.nagy@arm.com> PR target/78945 |