diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | NEWS | 25 | ||||
| -rw-r--r-- | sysdeps/i386/i486/bits/atomic.h | 7 | ||||
| -rw-r--r-- | sysdeps/x86_64/bits/atomic.h | 7 |
4 files changed, 35 insertions, 12 deletions
@@ -1,3 +1,11 @@ +2015-06-23 Torvald Riegel <triegel@redhat.com> + + [BZ #17403] + * sysdeps/x86_64/bits/atomic.h: (atomic_full_barrier, + atomic_read_barrier, atomic_write_barrier): Define. + * sysdeps/i386/i486/bits/atomic.h (atomic_full_barrier, + atomic_read_barrier, atomic_write_barrier): Define. + 2015-06-23 Joseph Myers <joseph@codesourcery.com> * math/Makefile [$(PERL) != no] @@ -12,18 +12,19 @@ Version 2.22 438, 4719, 6792, 13028, 13064, 14094, 14841, 14906, 14958, 15319, 15467, 15790, 15969, 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293, 17322, - 17523, 17542, 17569, 17581, 17588, 17596, 17620, 17621, 17628, 17631, - 17692, 17711, 17715, 17776, 17779, 17792, 17836, 17912, 17916, 17930, - 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17977, 17978, 17987, - 17991, 17996, 17998, 17999, 18007, 18019, 18020, 18029, 18030, 18032, - 18034, 18036, 18038, 18039, 18042, 18043, 18046, 18047, 18049, 18068, - 18080, 18093, 18100, 18104, 18110, 18111, 18116, 18125, 18128, 18138, - 18185, 18196, 18197, 18206, 18210, 18211, 18217, 18219, 18220, 18221, - 18234, 18244, 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18397, - 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18468, 18469, 18470, - 18479, 18483, 18495, 18496, 18497, 18498, 18507, 18512, 18513, 18519, - 18520, 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, 18536, - 18539, 18540, 18542, 18544, 18545, 18546, 18547, 18553, 18558, 18569. + 17403, 17523, 17542, 17569, 17581, 17588, 17596, 17620, 17621, 17628, + 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17836, 17912, 17916, + 17930, 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17977, 17978, + 17987, 17991, 17996, 17998, 17999, 18007, 18019, 18020, 18029, 18030, + 18032, 18034, 18036, 18038, 18039, 18042, 18043, 18046, 18047, 18049, + 18068, 18080, 18093, 18100, 18104, 18110, 18111, 18116, 18125, 18128, + 18138, 18185, 18196, 18197, 18206, 18210, 18211, 18217, 18219, 18220, + 18221, 18234, 18244, 18247, 18287, 18319, 18324, 18333, 18346, 18371, + 18397, 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18468, 18469, + 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18507, 18512, 18513, + 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, + 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547, 18553, 18558, + 18569. * Cache information can be queried via sysconf() function on s390 e.g. with _SC_LEVEL1_ICACHE_SIZE as argument. diff --git a/sysdeps/i386/i486/bits/atomic.h b/sysdeps/i386/i486/bits/atomic.h index 01c2b94..59165be 100644 --- a/sysdeps/i386/i486/bits/atomic.h +++ b/sysdeps/i386/i486/bits/atomic.h @@ -535,3 +535,10 @@ typedef uintmax_t uatomic_max_t; #define atomic_or(mem, mask) __arch_or_body (LOCK_PREFIX, mem, mask) #define catomic_or(mem, mask) __arch_or_body (__arch_cprefix, mem, mask) + +/* We don't use mfence because it is supposedly slower due to having to + provide stronger guarantees (e.g., regarding self-modifying code). */ +#define atomic_full_barrier() \ + __asm __volatile (LOCK_PREFIX "orl $0, (%%esp)" ::: "memory") +#define atomic_read_barrier() __asm ("" ::: "memory") +#define atomic_write_barrier() __asm ("" ::: "memory") diff --git a/sysdeps/x86_64/bits/atomic.h b/sysdeps/x86_64/bits/atomic.h index 5d08146..203d92c 100644 --- a/sysdeps/x86_64/bits/atomic.h +++ b/sysdeps/x86_64/bits/atomic.h @@ -472,3 +472,10 @@ typedef uintmax_t uatomic_max_t; #define atomic_or(mem, mask) __arch_or_body (LOCK_PREFIX, mem, mask) #define catomic_or(mem, mask) __arch_or_body (__arch_cprefix, mem, mask) + +/* We don't use mfence because it is supposedly slower due to having to + provide stronger guarantees (e.g., regarding self-modifying code). */ +#define atomic_full_barrier() \ + __asm __volatile (LOCK_PREFIX "orl $0, (%%rsp)" ::: "memory") +#define atomic_read_barrier() __asm ("" ::: "memory") +#define atomic_write_barrier() __asm ("" ::: "memory") |