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 <liang.z...@intel.com> --- 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 > $TMPC << EOF +int main(void) { return 0; } +EOF + if compile_prog "" "-mavx2" ; then + avx2="yes" + else + avx2="no" + fi +fi + +if test "$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 -- 1.9.1