Git Repo - qemu.git/commit - target/i386/helper.h

author	Emilio G. Cota <[email protected]>
	Mon, 27 Jun 2016 19:01:51 +0000 (15:01 -0400)
committer	Richard Henderson <[email protected]>
	Wed, 26 Oct 2016 15:29:01 +0000 (08:29 -0700)
commit	ae03f8de45427042ecd10b0941a005f21ecc064c
tree	c3f96a2815553b63ed80dfae9d25ceaeab751d60	tree \| snapshot
parent	91682118aa330aff7e8ef0cc685c32d101f49940	commit \| diff

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 <[email protected]>
Message-Id: <1467054136 [email protected]>
Signed-off-by: Richard Henderson <[email protected]>

target-i386/helper.h		diff \| blob \| blame \| history
target-i386/mem_helper.c		diff \| blob \| blame \| history
target-i386/translate.c		diff \| blob \| blame \| history