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| author | Emilio G. Cota | 2016-06-27 21:01:51 +0200 |
|---|---|---|
| committer | Richard Henderson | 2016-10-26 17:29:01 +0200 |
| commit | ae03f8de45427042ecd10b0941a005f21ecc064c (patch) | |
| tree | c3f96a2815553b63ed80dfae9d25ceaeab751d60 /scripts | |
| parent | tcg: Emit barriers with parallel_cpus (diff) | |
| download | qemu-ae03f8de45427042ecd10b0941a005f21ecc064c.tar.gz qemu-ae03f8de45427042ecd10b0941a005f21ecc064c.tar.xz qemu-ae03f8de45427042ecd10b0941a005f21ecc064c.zip | |
target-i386: emulate LOCK'ed cmpxchg using cmpxchg helpers
The diff here is uglier than necessary. All this does is to turn
FOO
into:
if (s->prefix & PREFIX_LOCK) {
BAR
} else {
FOO
}
where FOO is the original implementation of an unlocked cmpxchg.
[rth: Adjust unlocked cmpxchg to use movcond instead of branches.
Adjust helpers to use atomic helpers.]
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <1467054136-10430-6-git-send-email-cota@braap.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions