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configure: rework parsing --cpu arguments to support all features unless blacklisted

Keeping an ever growing list of CPUs just to pass -march to the compiler and
enable fast_cmov is a waste of time. Every CPU we know has limitations is
already handled here, so just fallback to enabling everything when a passed in
argument is not one of those.

This will enable optimizations for CPU architectures released in the past 7 or
so years with supported GCC and clang compilers when used as argument in
configure, instead of silently ignoring them.

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2023-09-17 15:43:23 -03:00
parent fa20f5cd9e
commit abc346de73

14
configure vendored
View File

@ -5445,20 +5445,18 @@ elif enabled x86; then
cpuflags="-march=$cpu"
disable i686
;;
# targets that do support nopl and conditional mov (cmov)
i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
|core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|skylake*|knl\
|amdfam10|barcelona|b[dt]ver*|znver*)
cpuflags="-march=$cpu"
enable i686
enable fast_cmov
;;
# targets that do support conditional mov but on which it's slow
pentium4|pentium4m|prescott|nocona)
cpuflags="-march=$cpu"
enable i686
disable fast_cmov
;;
# everything else should support nopl and conditional mov (cmov)
*)
cpuflags="-march=$cpu"
enable i686
enable fast_cmov
;;
esac
fi