MSVC: Support building for AArch64. This commit does the following to get tests passing for MSVC/AArch64:
* Implements spin_delay() with an ISB instruction (like we do for gcc/clang on AArch64). * Sets USE_ARMV8_CRC32C unconditionally. Vendor-supported versions of Windows for AArch64 require at least ARMv8.1, which is where CRC extension support became mandatory. * Implements S_UNLOCK() with _InterlockedExchange(). The existing implementation for MSVC uses _ReadWriteBarrier() (a compiler barrier), which is insufficient for this purpose on non-TSO architectures. There are likely other changes required to take full advantage of the hardware (e.g., atomics/arch-arm.h, simd.h, pg_popcount_aarch64.c), but those can be dealt with later. Author: Niyas Sait <[email protected]> Co-authored-by: Greg Burd <[email protected]> Co-authored-by: Dave Cramer <[email protected]> Reviewed-by: Michael Paquier <[email protected]> Reviewed-by: John Naylor <[email protected]> Reviewed-by: Peter Eisentraut <[email protected]> Reviewed-by: Andres Freund <[email protected]> Reviewed-by: Thomas Munro <[email protected]> Tested-by: Andrew Dunstan <[email protected]> Discussion: https://postgr.es/m/A6152C7C-F5E3-4958-8F8E-7692D259FF2F%40greg.burd.me Discussion: https://postgr.es/m/CAFPTBD-74%2BAEuN9n7caJ0YUnW5A0r-KBX8rYoEJWqFPgLKpzdg%40mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/a516b3f00d7469cbd1885a2c5903fbd62430a2ac Modified Files -------------- doc/src/sgml/installation.sgml | 3 ++- meson.build | 6 +++++- src/include/storage/s_lock.h | 30 +++++++++++++++++++++++++----- src/port/pg_crc32c_armv8.c | 4 ++++ src/tools/msvc_gendef.pl | 8 ++++---- 5 files changed, 40 insertions(+), 11 deletions(-)
