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| author | Torvald Riegel <triegel@redhat.com> | 2013-08-30 10:33:41 +0000 |
|---|---|---|
| committer | Torvald Riegel <torvald@gcc.gnu.org> | 2013-08-30 10:33:41 +0000 |
| commit | bec9ec3fc1f24d55a37a6c90ac03dc60f87d4d72 (patch) | |
| tree | c0b7c9260feea5365646627e5ddc4df6b74877de /libitm/config/linux | |
| parent | 8595a07d8d161b4c612101171f3ad423689ec020 (diff) | |
| download | gcc-bec9ec3fc1f24d55a37a6c90ac03dc60f87d4d72.zip gcc-bec9ec3fc1f24d55a37a6c90ac03dc60f87d4d72.tar.gz gcc-bec9ec3fc1f24d55a37a6c90ac03dc60f87d4d72.tar.bz2 | |
Add custom HTM fast path for RTM on x86_64.
* libitm_i.h (gtm_thread): Assign an asm name to serial_lock.
(htm_fastpath): Assign an asm name.
* libitm.h (_ITM_codeProperties): Add non-ABI flags used by custom
HTM fast paths.
(_ITM_actions): Likewise.
* config/x86/target.h (HTM_CUSTOM_FASTPATH): Enable custom fastpath on
x86_64.
* config/x86/sjlj.S (_ITM_beginTransaction): Add custom HTM fast path.
* config/posix/rwlock.h (gtm_rwlock): Update comments. Move summary
field to the start of the structure.
* config/linux/rwlock.h (gtm_rwlock): Update comments.
* beginend.cc (gtm_thread::begin_transaction): Add retry policy
handling for custom HTM fast paths.
From-SVN: r202101
Diffstat (limited to 'libitm/config/linux')
| -rw-r--r-- | libitm/config/linux/rwlock.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libitm/config/linux/rwlock.h b/libitm/config/linux/rwlock.h index 428299f..c761edf 100644 --- a/libitm/config/linux/rwlock.h +++ b/libitm/config/linux/rwlock.h @@ -39,6 +39,11 @@ struct gtm_thread; // // In this implementation, writers are given highest priority access but // read-to-write upgrades do not have a higher priority than writers. +// +// Do not change the layout of this class; it must remain a POD type with +// standard layout, and the WRITERS field must be first (i.e., so the +// assembler code can assume that its address is equal to the address of the +// respective instance of the class). class gtm_rwlock { |