aarch64: add cpuflags support for NEON and VFP

NEON and VFP are currently mandatory for all ARMv8 profiles. Both are
handled as extensions as far as cpuflags are concerned. This is
consistent with handling x86_64 which always has SSE2, but still
handles it as an extension.

1 files changed, 14 insertions, 3 deletions

diff --git a/configure b/configure
index 725b63a1f2..47b97a8a08 100755
--- a/configure
+++ b/configure
@@ -1543,8 +1543,8 @@ CMDLINE_APPEND="
 armv5te_deps="arm"
 armv6_deps="arm"
 armv6t2_deps="arm"
-neon_deps="arm"
-vfp_deps="arm"
+neon_deps_any="aarch64 arm"
+vfp_deps_any="aarch64 arm"
 vfpv3_deps="vfp"
 
 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
@@ -3596,7 +3596,14 @@ od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
 
 check_inline_asm inline_asm_labels '"1:\n"'
 
-if enabled alpha; then
+if enabled aarch64; then
+    # internal assembler in clang 3.3 does not support this instruction
+    enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
+    enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
+
+    map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
+
+elif enabled alpha; then
 
     check_cflags -mieee
 
@@ -4250,6 +4257,10 @@ if enabled x86; then
     echo "EBX available             ${ebx_available-no}"
     echo "EBP available             ${ebp_available-no}"
 fi
+if enabled aarch64; then
+    echo "NEON enabled              ${neon-no}"
+    echo "VFP enabled               ${vfp-no}"
+fi
 if enabled arm; then
     echo "ARMv5TE enabled           ${armv5te-no}"
     echo "ARMv6 enabled             ${armv6-no}"