Enable AVX2 optimizations for libvpx

generate_gypi.sh

Index: generate_gypi.sh
===================================================================
--- generate_gypi.sh	(revision 263116)
+++ generate_gypi.sh	(working copy)
@@ -144,9 +144,7 @@
     exit 1
   fi
   if [ 0 -ne ${#avx2_sources} ]; then
-    #write_target_definition avx2_sources[@] $2 libvpx_intrinsics_avx2 avx2
-    echo "ERROR: Uncomment avx2 sections in libvpx.gyp"
-    exit 1
+    write_target_definition avx2_sources[@] $2 libvpx_intrinsics_avx2 avx2
   fi
 
   # arm neon
@@ -266,7 +264,6 @@
     --arch=$2 \
     --sym=vp8_rtcd \
     --config=$BASE_DIR/$TEMP_DIR/libvpx.config \
-    --disable-avx2 \
     $BASE_DIR/$LIBVPX_SRC_DIR/vp8/common/rtcd_defs.pl \
     > $BASE_DIR/$LIBVPX_CONFIG_DIR/$1/vp8_rtcd.h
 
@@ -274,7 +271,6 @@
     --arch=$2 \
     --sym=vp9_rtcd \
     --config=$BASE_DIR/$TEMP_DIR/libvpx.config \
-    --disable-avx2 \
     $BASE_DIR/$LIBVPX_SRC_DIR/vp9/common/vp9_rtcd_defs.pl \
     > $BASE_DIR/$LIBVPX_CONFIG_DIR/$1/vp9_rtcd.h
 
@@ -282,7 +278,6 @@
     --arch=$2 \
     --sym=vpx_scale_rtcd \
     --config=$BASE_DIR/$TEMP_DIR/libvpx.config \
-    --disable-avx2 \
     $BASE_DIR/$LIBVPX_SRC_DIR/vpx_scale/vpx_scale_rtcd.pl \
     > $BASE_DIR/$LIBVPX_CONFIG_DIR/$1/vpx_scale_rtcd.h
 
@@ -317,7 +312,7 @@
 cd $TEMP_DIR
 
 echo "Generate Config Files"
-all_platforms="--enable-external-build --enable-postproc --disable-install-srcs --enable-multi-res-encoding --enable-temporal-denoising --disable-unit-tests --disable-install-docs --disable-examples --disable-avx2"
+all_platforms="--enable-external-build --enable-postproc --disable-install-srcs --enable-multi-res-encoding --enable-temporal-denoising --disable-unit-tests --disable-install-docs --disable-examples"
 gen_config_files linux/ia32 "--target=x86-linux-gcc --disable-ccache --enable-pic --enable-realtime-only ${all_platforms}"
 gen_config_files linux/x64 "--target=x86_64-linux-gcc --disable-ccache --enable-pic --enable-realtime-only ${all_platforms}"
 gen_config_files linux/arm "--target=armv6-linux-gcc --enable-pic --enable-realtime-only --disable-install-bins --disable-install-libs ${all_platforms}"