Centralize detection of x86 CPU features
We now maintain an array of booleans that indicate which features were
detected at runtime. When code wants to check for a given feature,
the array is automatically checked if it has been initialized and if
not, a single function checks all features at once.
Move all x86 feature detection to pg_cpu_x86.c, and move the CRC
function choosing logic to the file where the hardware-specific
functions are defined, consistent with more recent hardware-specific
files in src/port.
Reviewed-by: Zsolt Parragi <zsolt.parragi@percona.com>
Discussion: https://postgr.es/m/CANWCAZbgEUFw7LuYSVeJ=Tj98R5HoOB1Ffeqk3aLvbw5rU5NTw@mail.gmail.com
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/16743db061e431d40522547c6436af6616026caa
Modified Files
--------------
src/include/port/pg_cpu.h | 50 ++++++++++++++++++++++
src/port/pg_cpu_x86.c | 65 +++++++++++-----------------
src/port/pg_crc32c_sse42.c | 32 ++++++++++++++
src/port/pg_popcount_x86.c | 91 ++--------------------------------------
src/tools/pgindent/typedefs.list | 1 +
5 files changed, 112 insertions(+), 127 deletions(-)
