Add 64-bit ARM (ARMv8, little endian) by M-HT. Thanks M-HT!

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@4117

configure.ac

@@ -289,6 +289,12 @@ case "$host_cpu" in
     c_targetcpu="arm"
     dnl c_unalignedmemory=yes
     ;;
+   aarch64)
+    AC_DEFINE(C_TARGETCPU,ARMV8LE)
+    AC_MSG_RESULT(ARMv8 Little Endian 64-bit)
+    c_targetcpu="arm"
+    c_unalignedmemory=yes
+    ;;
    *)
     AC_DEFINE(C_TARGETCPU,UNKNOWN)
     AC_MSG_RESULT(unknown)

src/cpu/core_dynrec.cpp

@@ -139,6 +139,7 @@ static struct {
 #define ARMV4LE		0x04
 #define ARMV7LE		0x05
 #define POWERPC		0x04
+#define ARMV8LE		0x07
 
 #if C_TARGETCPU == X86_64
 #include "core_dynrec/risc_x64.h"
@@ -150,6 +151,8 @@ static struct {
 #include "core_dynrec/risc_armv4le.h"
 #elif C_TARGETCPU == POWERPC
 #include "core_dynrec/risc_ppc.h"
+#elif C_TARGETCPU == ARMV8LE
+#include "core_dynrec/risc_armv8le.h"
 #endif
 
 #include "core_dynrec/decoder.h"

src/cpu/core_dynrec/Makefile.am

@@ -2,4 +2,4 @@ noinst_HEADERS = cache.h decoder.h decoder_basic.h decoder_opcodes.h \
                  dyn_fpu.h operators.h risc_x64.h risc_x86.h risc_mipsel32.h \
                  risc_armv4le.h risc_armv4le-common.h \
                  risc_armv4le-o3.h risc_armv4le-thumb.h \
-                 risc_armv4le-thumb-iw.h risc_armv4le-thumb-niw.h
+                 risc_armv4le-thumb-iw.h risc_armv4le-thumb-niw.h risc_armv8le.h