Commit graph

7 commits

Author SHA1 Message Date
Richard Henderson 064543a415
tcg: Add CONFIG_ATOMIC64
Allow qemu to build on 32-bit hosts without 64-bit atomic ops.

Even if we only allow 32-bit hosts to multi-thread emulate 32-bit
guests, we still need some way to handle the 32-bit guest using a
64-bit atomic operation. Do so by dropping back to single-step.

Backports commit df79b996a7b21c6ea7847f7927a2e1a294b86c72 from qemu
2018-02-27 22:25:36 -05:00
Richard Henderson da01e53757
tcg: Add atomic128 helpers
Force the use of cmpxchg16b on x86_64.

Wikipedia suggests that only very old AMD64 (circa 2004) did not have
this instruction. Further, it's required by Windows 8 so no new cpus
will ever omit it.

If we truely care about these, then we could check this at startup time
and then avoid executing paths that use it.

Backports commit 7ebee43ee3e2fcd7b5063058b7ef74bc43216733 from qemu
2018-02-27 21:43:48 -05:00
Richard Henderson 5c0ce1b99c
tcg: Add atomic helpers
Add all of cmpxchg, op_fetch, fetch_op, and xchg.
Handle both endian-ness, and sizes up to 8.
Handle expanding non-atomically, when emulating in serial.

Backports commit c482cb117cc418115ca9c6d21a7a2315414c0a40 from qemu
2018-02-27 15:57:47 -05:00
Peter Maydell c9bf91049c
all: Clean up includes
Clean up includes so that osdep.h is included first and headers
which it implies are not included manually.

This commit was created with scripts/clean-includes.

Backports commit d38ea87ac54af64ef611de434d07c12dc0399216 from qemu
2018-02-19 01:34:28 -05:00
xorstream fac6a66860 platform.h move #3 2017-01-21 00:13:21 +11:00
xorstream 1aeaf5c40d This code should now build the x86_x64-softmmu part 2. 2017-01-19 22:50:28 +11:00
Nguyen Anh Quynh 344d016104 import 2015-08-21 15:04:50 +08:00