[PATCH v2 0/2] MR7237: include: Fix ReadNoFence64 on i386.

[Jinoh Kang (＠iamahuman)]

64-bit volatile accesses are not atomic on i386.  Both
i686-w64-mingw32-gcc and x86 MSVC splits 64-bit loads into two
load/stores of a pair of 32-bit words.

Fix this by using FILD/FSTP pair, which is used to implement C11 atomics
by i686-w64-mingw32-gcc.

Fixes: f82b1c1fcf770a5d6fa02c3f286282be79a201b8

--
  v2: include: Prevent misuse of __WINE_ATOMIC_* helper macros for non-atomic large accesses.
      include: Fix ReadNoFence64 on i386.

https://gitlab.winehq.org/wine/wine/-/merge_requests/7237