add aarch64 port
This adds complete aarch64 target support including bigendian subarch.
Some of the long double math functions are known to be broken otherwise
interfaces should be fully functional, but at this point consider this
port experimental.
Initial work on this port was done by Sireesh Tripurari and Kevin Bortis.
diff --git a/configure b/configure
index e80fdfb..7304b13 100755
--- a/configure
+++ b/configure
@@ -245,6 +245,7 @@
# Catch these early to simplify matching for 32-bit archs
mips64*|powerpc64*) fail "$0: unsupported target \"$target\"" ;;
arm*) ARCH=arm ;;
+aarch64*) ARCH=aarch64 ;;
i?86*) ARCH=i386 ;;
x86_64-x32*|x32*|x86_64*x32) ARCH=x32 ;;
x86_64*) ARCH=x86_64 ;;
@@ -440,6 +441,10 @@
trycppif __ARM_PCS_VFP "$t" && SUBARCH=${SUBARCH}hf
fi
+if test "$ARCH" = "aarch64" ; then
+trycppif __AARCH64EB__ "$t" && SUBARCH=${SUBARCH}_be
+fi
+
if test "$ARCH" = "mips" ; then
trycppif "_MIPSEL || __MIPSEL || __MIPSEL__" "$t" && SUBARCH=${SUBARCH}el
trycppif __mips_soft_float "$t" && SUBARCH=${SUBARCH}-sf