[speex-dev] libspeex/SSE Intrinsics with GCC 3.3.x

Jean-Marc Valin Jean-Marc.Valin at USherbrooke.ca
Thu Apr 1 21:53:04 PST 2004

Actually, I prefer having the user explicitly specify --enable-sse
because you might want to compile for other machines than what you have.
Also, any idea what happens if the user already has CFLAGS=-O2 defined
(and you add -O3)? Last thing, how do you check whether gcc accepts


Le ven 02/04/2004 à 00:40, Aron Rosenberg a écrit :
> Here is code to add to configure.in to do what you want. It preserves 
> CFLAGS and uses that var to hold the sse enable flags. You can subset this 
> under the exisiting AC_ARG for sse or just make it do it all the time. If 
> you notice the i?86, that means any x86 platform target will have it 
> enabled. You can change that i686, but keep in mind that some distros 
> compile/target for i386 on the glibc / gcc compiles and you will sometimes 
> get i386 as the target even though you are on a pentium 3/4 box.
> Aron Rosenberg
> SightSpeed
> +++++ Add to configure.in ++++++++
> echo -n "Checking for Platform ASM Speedups..."
> case "$target" in
>      i?86*)
>          CFLAGS="$CFLAGS -D_USE_SSE -O3 -msse"
>          echo "Found and Activating SSE"
>          ;;
>      powerpc-apple-darwin*)
>          CFLAGS="-faltivec"
>          echo "Found and Activating Altivec"
>          ;;
>      *)
>          echo "None Found"
>          ;;
> esac

Jean-Marc Valin
Université de Sherbrooke, Québec, Canada

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 190 bytes
Desc: Ceci est une partie de message numériquement signée.
Url : http://lists.xiph.org/pipermail/speex-dev/attachments/20040402/2cac96fc/signature.pgp

More information about the Speex-dev mailing list