598e0114a3
This commit fixes a few things: * Instead of checking for CPU support of the "xsave" extension, we need to check for OS support of XGETBV instructions via the "osxsave" flag. * We must check that additional XCR0 bits are set to be sure the ZMM registers are fully enabled. * We should use the recommended ordering of steps. Specifically, we need to check that the ZMM registers are enabled prior to checking for AVX-512 via CPUID. In passing, split this code into separate functions to improve readability. Reported-by: Andrew Kane Reviewed-by: Akash Shankaran, Raghuveer Devulapalli Discussion: https://postgr.es/m/20240418024459.GA3385227%40nathanxps13
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.