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Re: [Qemu-devel] [v2 RESEND 2/2] configure: add options to config avx2
From: |
Juan Quintela |
Subject: |
Re: [Qemu-devel] [v2 RESEND 2/2] configure: add options to config avx2 |
Date: |
Tue, 10 Nov 2015 10:01:09 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
Liang Li <address@hidden> wrote:
> Add the '--enable-avx2' & '--disable-avx2' option so as to config
> the AVX2 instruction optimization.
>
> By default, avx2 optimization is enabled, if '--disable-avx2' is not
> set, configure will detect if the compiler can support AVX2 option,
> if yes, AVX2 optimization is eabled, else disabled.
>
> Signed-off-by: Liang Li <address@hidden>
> ---
> configure | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/configure b/configure
> index 42e57c0..4d81be2 100755
> --- a/configure
> +++ b/configure
> @@ -310,6 +310,7 @@ smartcard=""
> libusb=""
> usb_redir=""
> opengl=""
> +avx2="yes"
> zlib="yes"
> lzo=""
> snappy=""
> @@ -1057,6 +1058,10 @@ for opt do
> ;;
> --enable-usb-redir) usb_redir="yes"
> ;;
> + --disable-avx2) avx2="no"
> + ;;
> + --enable-avx2) avx2="yes"
> + ;;
> --disable-zlib-test) zlib="no"
> ;;
> --disable-lzo) lzo="no"
> @@ -1373,6 +1378,7 @@ disabled with --disable-FEATURE, default is enabled if
> available:
> smartcard smartcard support (libcacard)
> libusb libusb (for usb passthrough)
> usb-redir usb network redirection support
> + avx2 support of avx2 instruction
> lzo support of lzo compression library
> snappy support of snappy compression library
> bzip2 support of bzip2 compression library
> @@ -1809,6 +1815,24 @@ EOF
> fi
> fi
>
> +########################################
> +# avx2 check
> +
> +if test "$avx2" != "no" ; then
> + cat > $TMPC << EOF
> +int main(void) { return 0; }
> +EOF
> + if compile_prog "" "-mavx2" ; then
> + avx2="yes"
> + else
> + avx2="no"
the else bit shouldn't be:
if test "$avx2" = "yes"; then
feature_not_found "avx2" "Your compiler don't support avx2"
fi
avx=2="no"
??
> + fi
> +fi
> +
> +if test "$avx2" = "yes" ; then
> + avx2_cflags=" -mavx2"
> +fi
> +
> ##########################################
> # zlib check
>
> @@ -4782,6 +4806,7 @@ echo "libssh2 support $libssh2"
> echo "TPM passthrough $tpm_passthrough"
> echo "QOM debugging $qom_cast_debug"
> echo "vhdx $vhdx"
> +echo "avx2 support $avx2"
> echo "lzo support $lzo"
> echo "snappy support $snappy"
> echo "bzip2 support $bzip2"
> @@ -5166,6 +5191,10 @@ if test "$opengl" = "yes" ; then
> echo "OPENGL_LIBS=$opengl_libs" >> $config_host_mak
> fi
>
> +if test "$avx2" = "yes" ; then
> + echo "AVX2_CFLAGS=$avx2_cflags" >> $config_host_mak
> +fi
> +
> if test "$lzo" = "yes" ; then
> echo "CONFIG_LZO=y" >> $config_host_mak
> fi