3 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	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
Nguyen Anh Quynh	344d016104	import	2015-08-21 15:04:50 +08:00