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diff --git a/source/mupen64plus-core/src/r4300/x86_64/rjump.c b/source/mupen64plus-core/src/r4300/x86_64/rjump.c
new file mode 100644
index 0000000..907c943
--- /dev/null
+++ b/source/mupen64plus-core/src/r4300/x86_64/rjump.c
@@ -0,0 +1,112 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ *   Mupen64plus - rjump.c                                                 *
+ *   Mupen64Plus homepage: http://code.google.com/p/mupen64plus/           *
+ *   Copyright (C) 2007 Richard Goedeken (Richard42)                       *
+ *   Copyright (C) 2002 Hacktarux                                          *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.          *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include <stdlib.h>
+
+#include "api/m64p_types.h"
+#include "api/callbacks.h"
+#include "r4300/recomp.h"
+#include "r4300/r4300.h"
+#include "r4300/macros.h"
+#include "r4300/ops.h"
+#include "r4300/recomph.h"
+
+// that's where the dynarec will restart when going back from a C function
+static unsigned long long *return_address;
+
+void dyna_jump(void)
+{
+    if (stop == 1)
+    {
+        dyna_stop();
+        return;
+    }
+
+    if (PC->reg_cache_infos.need_map)
+        *return_address = (unsigned long long) (PC->reg_cache_infos.jump_wrapper);
+    else
+        *return_address = (unsigned long long) (actual->code + PC->local_addr);
+}
+
+static long long save_rsp = 0;
+static long long save_rip = 0;
+
+void dyna_start(void *code)
+{
+  /* save the base and stack pointers */
+  /* make a call and a pop to retrieve the instruction pointer and save it too */
+  /* then call the code(), which should theoretically never return.  */
+  /* When dyna_stop() sets the *return_address to the saved RIP, the emulator thread will come back here. */
+  /* It will jump to label 2, restore the base and stack pointers, and exit this function */
+  DebugMessage(M64MSG_INFO, "R4300: starting 64-bit dynamic recompiler at: %p", code);
+#if defined(__GNUC__) && defined(__x86_64__)
+  asm volatile
+    (" push %%rbx              \n"  /* we must push an even # of registers to keep stack 16-byte aligned */
+     " push %%r12              \n"
+     " push %%r13              \n"
+     " push %%r14              \n"
+     " push %%r15              \n"
+     " push %%rbp              \n"
+     " mov  %%rsp, %[save_rsp] \n"
+     " lea  %[reg], %%r15      \n" /* store the base location of the r4300 registers in r15 for addressing */
+     " call 1f                 \n"
+     " jmp 2f                  \n"
+     "1:                       \n"
+     " pop  %%rax              \n"
+     " mov  %%rax, %[save_rip] \n"
+
+     " sub $0x10, %%rsp        \n"
+     " and $-16, %%rsp         \n" /* ensure that stack is 16-byte aligned */
+     " mov %%rsp, %%rax        \n"
+     " sub $8, %%rax           \n"
+     " mov %%rax, %[return_address]\n"
+
+     " call *%%rbx             \n"
+     "2:                       \n"
+     " mov  %[save_rsp], %%rsp \n"
+     " pop  %%rbp              \n"
+     " pop  %%r15              \n"
+     " pop  %%r14              \n"
+     " pop  %%r13              \n"
+     " pop  %%r12              \n"
+     " pop  %%rbx              \n"
+     : [save_rsp]"=m"(save_rsp), [save_rip]"=m"(save_rip), [return_address]"=m"(return_address)
+     : "b" (code), [reg]"m"(*reg)
+     : "%rax", "memory"
+     );
+#endif
+
+    /* clear the registers so we don't return here a second time; that would be a bug */
+    save_rsp=0;
+    save_rip=0;
+}
+
+void dyna_stop(void)
+{
+  if (save_rip == 0)
+    DebugMessage(M64MSG_WARNING, "Instruction pointer is 0 at dyna_stop()");
+  else
+  {
+    *return_address = (unsigned long long) save_rip;
+  }
+}
+