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linux-atomic.c (__sync_lock_release_4): New.

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* config/pa/linux-atomic.c (__sync_lock_release_4): New.
	(SYNC_LOCK_RELEASE): Update to use __kernel_cmpxchg for release.
	Don't use SYNC_LOCK_RELEASE for int type.

From-SVN: r212767
This commit is contained in:
John David Anglin 2014-07-17 23:18:50 +00:00
parent 1435fa485e
commit a41370902e
2 changed files with 29 additions and 2 deletions
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6
libgcc/ChangeLog
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@ -1,3 +1,9 @@
2014-07-17 John David Anglin <danglin@gcc.gnu.org>
* config/pa/linux-atomic.c (__sync_lock_release_4): New.
(SYNC_LOCK_RELEASE): Update to use __kernel_cmpxchg for release.
Don't use SYNC_LOCK_RELEASE for int type.
2014-07-14 Richard Biener <rguenther@suse.de>
* libgcov.h (struct gcov_fn_info): Make ctrs size 1.

25
libgcc/config/pa/linux-atomic.c
View File

@ -293,13 +293,34 @@ __sync_lock_test_and_set_4 (int *ptr, int val)
SUBWORD_TEST_AND_SET (unsigned short, 2)
SUBWORD_TEST_AND_SET (unsigned char, 1)
void HIDDEN
__sync_lock_release_4 (int *ptr)
{
int failure, oldval;
do {
oldval = *ptr;
failure = __kernel_cmpxchg (oldval, 0, ptr);
} while (failure != 0);
}
#define SYNC_LOCK_RELEASE(TYPE, WIDTH) \
void HIDDEN \
__sync_lock_release_##WIDTH (TYPE *ptr) \
{ \
*ptr = 0; \
int failure; \
unsigned int oldval, newval, shift, mask; \
int *wordptr = (int *) ((unsigned long) ptr & ~3); \
\
shift = (((unsigned long) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \
mask = MASK_##WIDTH << shift; \
\
do { \
oldval = *wordptr; \
newval = oldval & ~mask; \
failure = __kernel_cmpxchg (oldval, newval, wordptr); \
} while (failure != 0); \
}
SYNC_LOCK_RELEASE (int, 4)
SYNC_LOCK_RELEASE (short, 2)
SYNC_LOCK_RELEASE (char, 1)