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11 Commits

Author SHA1 Message Date
Richard Sandiford
f93608e6d4 Update copyright years in libitm/ 
From-SVN: r206298
 2014-01-02 22:26:00 +00:00
Torvald Riegel
6fb471d812 libitm: Fix wrong initialization order introduced with r202101. 
* config/posix/rwlock.cc: Fix initialization order.

From-SVN: r202116
 2013-08-30 17:13:05 +00:00
Torvald Riegel
bec9ec3fc1 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
 2013-08-30 10:33:41 +00:00
Richard Sandiford
75f9527c9b Update copyright in libitm. 
From-SVN: r195697
 2013-02-03 17:46:11 +00:00
Torvald Riegel
64fbcc74a3 Add HTM fastpath and use Intel RTM for it on x86. 
* beginend.cc (htm_fastpath): New.
	(gtm_thread::begin_transaction, _ITM_commitTransaction,
	_ITM_commitTransactionEH): Add HTM fastpath handling.
	* config/linux/rwlock.h (gtm_rwlock.is_write_locked): New.
	* config/posix/rwlock.h (gtm_rwlock.is_write_locked): New.
	* config/x86/target.h (htm_available, htm_init, htm_begin_success,
	htm_begin, htm_commit, htm_abort, htm_abort_should_retry): New.
	* configure.tgt: Add -mrtm to XCFLAGS.
	* method-serial.cc (htm_mg, o_htm_mg, htm_dispatch, dispatch_htm): New.
	(gtm_thread::serialirr_mode): Add HTM fastpath handling.
	* libitm_i.h (htm_fastpath, dispatch_htm): Declare.
	* retry.cc (parse_default_method): Add HTM method parsing.
	(gtm_thread::number_of_threads_changed): Use HTM by default if
	available.

From-SVN: r193369
 2012-11-09 17:04:40 +00:00
Torvald Riegel
610e390135 libitm: Fix privatization safety during upgrades to serial mode. 
libitm/
	* beginend.cc (GTM::gtm_thread::restart): Add and handle
	finish_serial_upgrade parameter.
	* libitm.h (GTM::gtm_thread::restart): Adapt declaration.
	* config/linux/rwlock.cc (GTM::gtm_rwlock::write_lock_generic):
	Don't unset reader flag.
	(GTM::gtm_rwlock::write_upgrade_finish): New.
	* config/posix/rwlock.cc: Same.
	* config/linux/rwlock.h (GTM::gtm_rwlock::write_upgrade_finish):
	Declare.
	* config/posix/rwlock.h: Same.
	* method-serial.cc (GTM::gtm_thread::serialirr_mode): Unset reader
	flag after commit or after rollback when restarting.

From-SVN: r182675
 2011-12-24 01:42:35 +00:00
Torvald Riegel
799142bf74 libitm: Fixed conversion to C++11 atomics. 
libitm/
	* beginend.cc (GTM::gtm_thread::begin_transaction): Add comment.
	(GTM::gtm_thread::try_commit): Changed memory order.
	* config/linux/alpha/futex_bits.h (sys_futex0): Take atomic int
	as parameter.
	* config/linux/x86/futex_bits.h (sys_futex0): Same.
	* config/linux/sh/futex_bits.h (sys_futex0): Same.
	* config/linux/futex_bits.h (sys_futex0): Same.
	* config/linux/futex.cc (futex_wait, futex_wake): Same.
	* config/linux/futex.h (futex_wait, futex_wake): Same.
	* config/linux/rwlock.h (gtm_rwlock::writers,
	gtm_rwlock::writer_readers, gtm_rwlock::readers): Change to atomic
	ints.
	* config/linux/rwlock.cc (gtm_rwlock::read_lock,
	gtm_rwlock::write_lock_generic, gtm_rwlock::read_unlock,
	gtm_rwlock::write_unlock): Fix memory orders and fences.
	* config/posix/rwlock.cc (gtm_rwlock::read_lock,
	gtm_rwlock::write_lock_generic, gtm_rwlock::read_unlock,
	gtm_rwlock::write_unlock): Same.
	* config/linux/rwlock.h (gtm_rwlock::summary): Change to atomic int.
	* method-gl.cc (gl_mg::init, gl_wt_dispatch::memtransfer_static,
	gl_wt_dispatch::memset_static, gl_wt_dispatch::begin_or_restart):
	Add comments.
	(gl_wt_dispatch::pre_write, gl_wt_dispatch::validate,
	gl_wt_dispatch::load, gl_wt_dispatch::store,
	gl_wt_dispatch::try_commit, gl_wt_dispatch::rollback): Fix memory
	orders and fences.  Add comments.

From-SVN: r182674
 2011-12-24 01:42:20 +00:00
Richard Henderson
5d9d05d349 rwlock.cc (gtm_rwlock::write_lock_generic): Fix signed/unsigned comparison werror. 
* config/posix/rwlock.cc (gtm_rwlock::write_lock_generic): Fix
        signed/unsigned comparison werror.

From-SVN: r182302
 2011-12-13 12:10:36 -08:00
Richard Henderson
36cfbee133 libitm: Conversion to c++11 atomics. 
* local_atomic: New file.
        * libitm_i.h: Include it.
        (gtm_thread::shared_state): Use atomic template.
        * beginend.cc (GTM::gtm_clock): Use atomic template.
        (global_tid): Use atomic template if 64-bit atomics available.
        (gtm_thread::gtm_thread): Update shared_state access.
        (gtm_thread::trycommit): Likewise.
        (choose_code_path): Update global_tid access.
        * method-gl.cc (gl_mg::orec): Use atomic template.  Update all users.
        * stmlock.h (GTM::gtm_clock): Use atomic template.
        (gtm_get_clock, gtm_inc_clock): Update accesses.
        * config/linux/rwlock.cc (gtm_rwlock::read_lock): Remove
        redundant __sync_synchronize after atomic shared_state access.
        * config/posix/rwlock.cc (gtm_rwlock::read_lock): Likewise.
        (gtm_rwlock::write_lock_generic): Likewise.
        (gtm_rwlock::read_unlock): Likewise.
        * config/alpha/target.h (atomic_read_barrier): Remove.
        (atomic_write_barrier): Remove.
        * config/x86/target.h (atomic_read_barrier): Remove.
        (atomic_write_barrier): Remove.

From-SVN: r182294
 2011-12-13 11:11:25 -08:00
Richard Henderson
79b1edb6b5 libitm: Remove unused code. 
In particular, unused code that's presenting portability problems.

From-SVN: r181241
 2011-11-09 14:54:55 -08:00
Aldy Hernandez
0a35513e4e Merge from transactional-memory branch. 
From-SVN: r181154
 2011-11-08 11:13:41 +00:00