--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/h8300/proepi.md	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,127 @@
+;; ----------------------------------------------------------------------
+;; PROLOGUE/EPILOGUE-RELATED INSTRUCTIONS
+;; ----------------------------------------------------------------------
+
+(define_expand "push_h8300hs_advanced"
+  [(set (mem:SI (pre_dec:SI (reg:SI SP_REG)))
+        (match_operand:SI 0 "register_operand" ""))]
+  "TARGET_H8300H && TARGET_H8300S && !TARGET_NORMAL_MODE"
+  "")
+
+(define_expand "push_h8300hs_normal"
+  [(set (mem:SI (pre_dec:HI (reg:HI SP_REG)))
+        (match_operand:SI 0 "register_operand" ""))]
+  "TARGET_H8300H && TARGET_H8300S && TARGET_NORMAL_MODE"
+  "")
+
+(define_expand "pop_h8300hs_advanced"
+  [(set (match_operand:SI 0 "register_operand" "")
+	(mem:SI (post_inc:SI (reg:SI SP_REG))))]
+  "TARGET_H8300H && TARGET_H8300S && !TARGET_NORMAL_MODE"
+  "")
+
+(define_expand "pop_h8300hs_normal"
+  [(set (match_operand:SI 0 "register_operand" "")
+	(mem:SI (post_inc:HI (reg:HI SP_REG))))]
+  "TARGET_H8300H && TARGET_H8300S && TARGET_NORMAL_MODE"
+  "")
+
+(define_insn "ldm_h8300sx"
+  [(match_parallel           0 "h8300_ldm_parallel"
+    [(set (match_operand:SI 1 "register_operand" "")
+	  (match_operand:SI 2 "memory_operand" ""))])]
+  "TARGET_H8300S"
+{
+  operands[3] = SET_DEST (XVECEXP (operands[0], 0,
+				   XVECLEN (operands[0], 0) - 2));
+  return "ldm.l\t@er7+,%S1-%S3";
+}
+  [(set_attr "cc" "none")
+   (set_attr "length" "4")])
+
+(define_insn "stm_h8300sx"
+  [(match_parallel           0 "h8300_stm_parallel"
+    [(set (match_operand:SI 1 "memory_operand" "")
+	  (match_operand:SI 2 "register_operand" ""))])]
+  "TARGET_H8300S"
+{
+  operands[3] = SET_SRC (XVECEXP (operands[0], 0,
+				  XVECLEN (operands[0], 0) - 2));
+  return "stm.l\t%S2-%S3,@-er7";
+}
+  [(set_attr "cc" "none")
+   (set_attr "length" "4")])
+
+(define_insn "return_h8sx"
+  [(match_parallel           0 "h8300_return_parallel"
+    [(return)
+     (set (match_operand:SI 1 "register_operand" "")
+	  (match_operand:SI 2 "memory_operand" ""))])]
+  "TARGET_H8300SX"
+{
+  operands[3] = SET_DEST (XVECEXP (operands[0], 0,
+				   XVECLEN (operands[0], 0) - 2));
+  if (h8300_current_function_interrupt_function_p ()
+      || h8300_current_function_monitor_function_p ())
+    return "rte/l\t%S1-%S3";
+  else
+    return "rts/l\t%S1-%S3";
+}
+  [(set_attr "cc" "none")
+   (set_attr "can_delay" "no")
+   (set_attr "length" "2")])
+
+(define_expand "return"
+  [(return)]
+  "h8300_can_use_return_insn_p ()"
+  "")
+
+(define_insn "*return_1"
+  [(return)]
+  "reload_completed"
+{
+  if (h8300_current_function_interrupt_function_p ()
+      || h8300_current_function_monitor_function_p ())
+    return "rte";
+  else
+    return "rts";
+}
+  [(set_attr "cc" "none")
+   (set_attr "can_delay" "no")
+   (set_attr "length" "2")])
+
+(define_expand "prologue"
+  [(const_int 0)]
+  ""
+  {
+    h8300_expand_prologue ();
+    DONE;
+  })
+
+(define_expand "epilogue"
+  [(return)]
+  ""
+  {
+    h8300_expand_epilogue ();
+    DONE;
+  })
+
+(define_insn "monitor_prologue"
+  [(unspec_volatile [(const_int 0)] UNSPEC_MONITOR)]
+  ""
+{
+  if (TARGET_H8300H && TARGET_NORMAL_MODE)
+    return "subs\\t#2,er7\;mov.l\\ter0,@-er7\;stc\\tccr,r0l\;mov.b\\tr0l,@(4,er7)\;mov.l\\t@er7+,er0\;orc\\t#128,ccr";
+  else if (TARGET_H8300H)
+    return "mov.l\\ter0,@-er7\;stc\\tccr,r0l\;mov.b\\tr0l,@(4,er7)\;mov.l\\t@er7+,er0\;orc\\t#128,ccr";
+  else if (TARGET_H8300S && TARGET_NEXR )
+    return "mov.l\\ter0,@-er7\;stc\tccr,r0l\;mov.b\tr0l,@(4,er7)\;mov.l\\t@er7+,er0\;orc\t#128,ccr";
+  else if (TARGET_H8300S && TARGET_NEXR && TARGET_NORMAL_MODE)
+    return "subs\\t#2,er7\;mov.l\\ter0,@-er7\;stc\tccr,r0l\;mov.b\tr0l,@(4,er7)\;mov.l\\t@er7+,er0\;orc\t#128,ccr";
+  else if (TARGET_H8300S && TARGET_NORMAL_MODE)
+    return "subs\\t#2,er7\;stc\texr,@-er7\;mov.l\\ter0,@-er7\;stc\tccr,r0l\;mov.b\tr0l,@(6,er7)\;mov.l\\t@er7+,er0\;orc\t#128,ccr";
+  else if (TARGET_H8300S)
+    return "stc\texr,@-er7\;mov.l\\ter0,@-er7\;stc\tccr,r0l\;mov.b\tr0l,@(6,er7)\;mov.l\\t@er7+,er0\;orc\t#128,ccr";
+  gcc_unreachable ();
+}
+  [(set_attr "length" "20")])