Specify -mfpu=neon for neon files

generate_gypi.sh

 #!/bin/bash -e
 #
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script is used to generate .gypi files and files in the config/platform
 # directories needed to build libvpx.
 # Every time libvpx source code is updated just run this script.
 #
@@ skipping 61 matching lines @@
   echo "        '<(libvpx_source)'," >> $2
   echo "      ]," >> $2
   echo "      'sources': [" >> $2
   for f in $sources_list
   do
     echo "        '<(libvpx_source)/$f'," >> $2
   done
   echo "      ]," >> $2
   echo "      'conditions': [" >> $2
   echo "        ['os_posix==1 and OS!=\"mac\"', {" >> $2
+  echo "          'cflags!': [ '-mfpu=vfpv3-d16' ]," >> $2
   echo "          'cflags': [ '-m$4', ]," >> $2
   echo "        }]," >> $2
   echo "        ['OS==\"mac\"', {" >> $2
   echo "          'xcode_settings': {" >> $2
   echo "            'OTHER_CFLAGS': [ '-m$4', ]," >> $2
   echo "          }," >> $2
   echo "        }]," >> $2
   echo "      ]," >> $2
   echo "    }," >> $2
 }
 
 
 # Generate a gypi which applies additional compiler flags based on the file
 # name.
 # $1 - Array name for file list.
 # $2 - Output file
 function write_special_flags {
   declare -a file_list=("${!1}")
 
   local mmx_sources=$(echo "$file_list" | grep '_mmx\.c$')
   local sse2_sources=$(echo "$file_list" | grep '_sse2\.c$')
   local sse3_sources=$(echo "$file_list" | grep '_sse3\.c$')
   local ssse3_sources=$(echo "$file_list" | grep '_ssse3\.c$')
   local sse4_1_sources=$(echo "$file_list" | grep '_sse4\.c$')
   local avx_sources=$(echo "$file_list" | grep '_avx\.c$')
   local avx2_sources=$(echo "$file_list" | grep '_avx2\.c$')
 
+  local neon_sources=$(echo "$file_list" | grep '_neon\.c$')
+
   # Intrinsic functions and files are in flux. We can selectively generate them
-  # but we can not selectively include them in libvpx.gyp. Throw some warnings
-  # when the expected output changes.
-
-  # Expect output for these:
-  if [ 0 -eq ${#mmx_sources} ]; then
-    echo "ERROR: Comment mmx sections in libvpx.gyp"
-    exit 1
-  fi
-  if [ 0 -eq ${#sse2_sources} ]; then
-    echo "ERROR: Comment sse2 sections in libvpx.gyp"
-    exit 1
-  fi
-  if [ 0 -eq ${#ssse3_sources} ]; then
-    echo "ERROR: Comment ssse3 sections in libvpx.gyp"
-    exit 1
-  fi
-
-  # Do not expect output for these:
-  if [ 0 -ne ${#sse3_sources} ]; then
-    echo "ERROR: Uncomment sse3 sections in libvpx.gyp"
-    exit 1
-  fi
-  if [ 0 -ne ${#sse4_1_sources} ]; then
-    echo "ERROR: Uncomment sse4_1 sections in libvpx.gyp"
-    exit 1
-  fi
-  if [ 0 -ne ${#avx_sources} ]; then
-    echo "ERROR: Uncomment avx sections in libvpx.gyp"
-    exit 1
-  fi
-  if [ 0 -ne ${#avx2_sources} ]; then
-    echo "ERROR: Uncomment avx2 sections in libvpx.gyp"
-    exit 1
-  fi
+  # but we can not selectively include them in libvpx.gyp. Throw some errors
+  # when new targets are needed.
 
   write_gypi_header $2
 
   echo "  'targets': [" >> $2
 
-  write_target_definition mmx_sources[@] $2 libvpx_intrinsics_mmx mmx
-  write_target_definition sse2_sources[@] $2 libvpx_intrinsics_sse2 sse2
-  #write_target_definition sse3_sources[@] $2 libvpx_intrinsics_sse3 sse3
-  write_target_definition ssse3_sources[@] $2 libvpx_intrinsics_ssse3 ssse3
-  #write_target_definition sse4_1_sources[@] $2 libvpx_intrinsics_sse4_1 sse4.1
-  #write_target_definition avx_sources[@] $2 libvpx_intrinsics_avx avx
-  #write_target_definition avx2_sources[@] $2 libvpx_intrinsics_avx2 avx2
+  # x86[_64]
+  if [ 0 -ne ${#mmx_sources} ]; then
+    write_target_definition mmx_sources[@] $2 libvpx_intrinsics_mmx mmx
+  fi
+  if [ 0 -ne ${#sse2_sources} ]; then
+    write_target_definition sse2_sources[@] $2 libvpx_intrinsics_sse2 sse2
+  fi
+  if [ 0 -ne ${#sse3_sources} ]; then
+    #write_target_definition sse3_sources[@] $2 libvpx_intrinsics_sse3 sse3
+    echo "ERROR: Uncomment sse3 sections in libvpx.gyp"
+    exit 1
+  fi
+  if [ 0 -ne ${#ssse3_sources} ]; then
+    write_target_definition ssse3_sources[@] $2 libvpx_intrinsics_ssse3 ssse3
+  fi
+  if [ 0 -ne ${#sse4_1_sources} ]; then
+    #write_target_definition sse4_1_sources[@] $2 libvpx_intrinsics_sse4_1 sse4.1
+    echo "ERROR: Uncomment sse4_1 sections in libvpx.gyp"
+    exit 1
+  fi
+  if [ 0 -ne ${#avx_sources} ]; then
+    #write_target_definition avx_sources[@] $2 libvpx_intrinsics_avx avx
+    echo "ERROR: Uncomment avx sections in libvpx.gyp"
+    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
+  fi
+
+  # arm neon
+  if [ 0 -ne ${#neon_sources} ]; then
+    write_target_definition neon_sources[@] $2 libvpx_intrinsics_neon fpu=neon
+  fi
 
   echo "  ]," >> $2
 
   write_gypi_footer $2
 }
 
 # Convert a list of source files into gypi file.
 # $1 - Input file.
 # $2 - Output gypi file base. Will generate additional .gypi files when
 #      different compilation flags are required.
@@ skipping 10 matching lines @@
   # not part of the compiled library.
   source_list=$(echo "$source_list" | grep -v '_offsets\.c')
 
   # Not sure why vpx_config is not included.
   source_list=$(echo "$source_list" | grep -v 'vpx_config\.c')
 
   # The actual ARM files end in .asm. We have rules to translate them to .S
   source_list=$(echo "$source_list" | sed s/\.asm\.s$/.asm/)
 
   # Select all x86 files ending with .c
-  local x86_intrinsic_list=$(echo "$source_list" | \
+  local intrinsic_list=$(echo "$source_list" | \
     egrep 'vp[89]/(encoder|decoder|common)/x86/'  | \
     egrep '(mmx|sse2|sse3|ssse3|sse4|avx|avx2).c$')
 
+  # Select all neon files ending in C but only when building in RTCD mode
+  if [ "libvpx_srcs_arm_neon_cpu_detect" == "$2" ]; then
+    # Select all arm neon files ending in _neon.c
+    # the pattern may need to be updated if vpx_scale gets intrinics
+    local intrinsic_list=$(echo "$source_list" | \
+      egrep 'vp[89]/(encoder|decoder|common)/arm/neon/'  | \
+      egrep '_neon.c$')
+  fi
+
   # Remove these files from the main list.
-  source_list=$(comm -23 <(echo "$source_list") <(echo "$x86_intrinsic_list"))
+  source_list=$(comm -23 <(echo "$source_list") <(echo "$intrinsic_list"))
 
   write_file_list source_list $BASE_DIR/$2.gypi
 
   # All the files are in a single "element." Check if the first element has
   # length 0.
-  if [ 0 -ne ${#x86_intrinsic_list} ]; then
-    write_special_flags x86_intrinsic_list[@] $BASE_DIR/$2_intrinsics.gypi
+  if [ 0 -ne ${#intrinsic_list} ]; then
+    write_special_flags intrinsic_list[@] $BASE_DIR/$2_intrinsics.gypi
   fi
 
 }
 
 # Clean files from previous make.
 function make_clean {
   make clean > /dev/null
   rm -f libvpx_srcs.txt
 }
 
@@ skipping 194 matching lines @@
 make_clean
 make libvpx_srcs.txt target=libs $config > /dev/null
 convert_srcs_to_gypi libvpx_srcs.txt libvpx_srcs_nacl
 
 echo "Remove temporary directory."
 cd $BASE_DIR
 rm -rf $TEMP_DIR
 
 # TODO(fgalligan): Is "--disable-fast-unaligned" needed on mipsel?
 # TODO(fgalligan): Can we turn on "--enable-realtime-only" for mipsel?