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Previously we would only check for the availability of __cpuidex if the related __get_cpuid_count was not available on a platform. Future commits will need to access hypervisor information about the TSC frequency of x86 CPUs. For that case __cpuidex is the only viable option for accessing a high leaf (e.g. 0x40000000), since __get_cpuid_count does not allow that. __cpuidex is defined in cpuid.h for gcc/clang, but in intrin.h for MSVC, so adjust tests to suite. We also need to cast the array of unsigned ints to signed, since gcc (with -Wall) and clang emit warnings otherwise. Author: Lukas Fittl <lukas@fittl.com> Reviewed-by: Andres Freund <andres@anarazel.de> Reviewed-by: John Naylor <john.naylor@postgresql.org> Discussion: https://postgr.es/m/CAP53PkyooCeR8YV0BUD_xC7oTZESHz8OdA=tP7pBRHFVQ9xtKg@mail.gmail.com
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/.