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Simplify and improve x86/amd64 CPU build flag

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On amd64 removes the "-msse" flag, which is already
enabled by default.

On x86 changes the flags from "-march=i686 -msse" to
"-march=pentium3 -mtune=generic". This should also enable
other CPU features like MMX, while keeping the same
minimun supported CPU (Intel Pentium3 or AMD Athlon 4)
previously required by "-msse".

Fixes #2329.

This was SVN commit r15170.
This commit is contained in:
fabio 2014-05-19 12:18:55 +00:00
parent 4a3df1c8c5
commit f4edb8dce5
1 changed files with 6 additions and 9 deletions
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15
build/premake/premake4.lua
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@ -269,13 +269,6 @@ function project_set_build_flags()
}
end
if arch == "x86" or arch == "amd64" then
buildoptions {
-- enable SSE intrinsics
"-msse"
}
end
if os.is("linux") or os.is("bsd") then
linkoptions { "-Wl,--no-undefined", "-Wl,--as-needed" }
end
@ -283,8 +276,12 @@ function project_set_build_flags()
if arch == "x86" then
buildoptions {
-- To support intrinsics like __sync_bool_compare_and_swap on x86
-- we need to set -march to something that supports them
"-march=i686"
-- we need to set -march to something that supports them (i686).
-- We use pentium3 to also enable other features like mmx and sse,
-- while tuning for generic to have good performance on every
-- supported CPU.
-- Note that all these features are already supported on amd64.
"-march=pentium3 -mtune=generic"
}
end
end