Imported gcc-4.4.3

[msp430-gcc.git] / gcc / config / m32c / prologue.md

diff --git a/gcc/config/m32c/prologue.md b/gcc/config/m32c/prologue.md
new file mode 100644 (file)
index 0000000..9db4920
--- /dev/null
+++ b/gcc/config/m32c/prologue.md
@@ -0,0 +1,182 @@
+;; Machine Descriptions for R8C/M16C/M32C
+;; Copyright (C) 2005, 2007, 2008
+;; Free Software Foundation, Inc.
+;; Contributed by Red Hat.
+;;
+;; This file is part of GCC.
+;;
+;; GCC 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 3, or (at your
+;; option) any later version.
+;;
+;; GCC 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 GCC; see the file COPYING3.  If not see
+;; <http://www.gnu.org/licenses/>.
+
+;; Prologue and epilogue patterns
+
+(define_expand "prologue"
+  [(const_int 1)]
+  ""
+  "m32c_emit_prologue(); DONE;"
+  )
+
+; For the next two, operands[0] is the amount of stack space we want
+; to reserve.
+
+; We assume dwarf2out will process each set in sequence.
+(define_insn "prologue_enter_16"
+  [(set (mem:HI (plus:HI (reg:HI SP_REGNO) (const_int -2)))
+       (reg:HI FB_REGNO))
+   (set (reg:HI FB_REGNO)
+       (plus:HI (reg:HI SP_REGNO) (const_int -2)))
+   (set (reg:HI SP_REGNO)
+       (minus:HI (reg:HI SP_REGNO)
+                  (match_operand 0 "const_int_operand" "i")))
+   ]
+  "TARGET_A16"
+  {
+    /* This is due to binutils bug gas/4659.  */
+    if (INTVAL (operands[0]) == 2)
+      return "enter\t#0";
+    return "enter\t%0-2";
+  }
+  [(set_attr "flags" "x")]
+  )
+
+(define_insn "prologue_enter_24"
+  [(set (mem:SI (plus:PSI (reg:PSI SP_REGNO) (const_int -4)))
+       (reg:SI FB_REGNO))
+   (set (reg:PSI FB_REGNO)
+       (plus:PSI (reg:PSI SP_REGNO) (const_int -4)))
+   (set (reg:PSI SP_REGNO)
+       (minus:PSI (reg:PSI SP_REGNO)
+                  (match_operand 0 "const_int_operand" "i")))
+   ]
+  "TARGET_A24"
+  {
+    /* This is due to binutils bug gas/4659.  */
+    if (INTVAL (operands[0]) == 4)
+      return "enter\t#0";
+    return "enter\t%0-4";
+  }
+  [(set_attr "flags" "x")]
+  )
+
+; Just a comment, for debugging the assembler output.
+(define_insn "prologue_end"
+  [(unspec_volatile [(const_int 0)] UNS_PROLOGUE_END)]
+  ""
+  "; end of prologue"
+  [(set_attr "flags" "n")]
+  )
+
+
+
+(define_expand "epilogue"
+  [(const_int 1)]
+  ""
+  "m32c_emit_epilogue(); DONE;"
+  )
+
+(define_expand "eh_return"
+  [(match_operand:PSI 0 "" "")]
+  ""
+  "m32c_emit_eh_epilogue(operands[0]); DONE;"
+  )
+
+(define_insn "eh_epilogue"
+  [(set (pc)
+       (unspec_volatile [(match_operand 0 "m32c_r1_operand" "")
+                         (match_operand 1 "m32c_r0_operand" "")
+                         ] UNS_EH_EPILOGUE))]
+  ""
+  "jmp.a\t__m32c_eh_return"
+  [(set_attr "flags" "x")]
+  )
+
+(define_insn "epilogue_exitd_16"
+  [(set (reg:HI SP_REGNO)
+       (plus:HI (reg:HI FB_REGNO)
+             (const_int 2)))
+   (set (reg:HI FB_REGNO)
+       (mem:HI (reg:HI FB_REGNO)))
+   (return)
+   ]
+  "TARGET_A16"
+  "exitd"
+  [(set_attr "flags" "x")]
+  )
+
+(define_insn "epilogue_reit_16"
+  [(set (reg:HI SP_REGNO)
+       (plus:HI (reg:HI SP_REGNO)
+             (const_int 4)))
+   (return)
+   ]
+  "TARGET_A16"
+  "reit"
+  [(set_attr "flags" "x")]
+  )
+
+(define_insn "epilogue_exitd_24"
+  [(set (reg:PSI SP_REGNO)
+       (plus:PSI (reg:PSI FB_REGNO)
+             (const_int 4)))
+   (set (reg:PSI FB_REGNO)
+       (mem:PSI (reg:PSI FB_REGNO)))
+   (return)
+   ]
+  "TARGET_A24"
+  "exitd"
+  [(set_attr "flags" "x")]
+  )
+
+(define_insn "epilogue_reit_24"
+  [(set (reg:PSI SP_REGNO)
+       (plus:PSI (reg:PSI SP_REGNO)
+             (const_int 6)))
+   (return)
+   ]
+  "TARGET_A24"
+  "reit"
+  [(set_attr "flags" "x")]
+  )
+
+(define_insn "epilogue_rts"
+  [(return)
+   ]
+  ""
+  "rts"
+  [(set_attr "flags" "x")]
+  )
+
+(define_insn "epilogue_start"
+  [(unspec_volatile [(const_int 0)] UNS_EPILOGUE_START)]
+  ""
+  "; start of epilogue"
+  [(set_attr "flags" "n")]
+  )
+
+
+; These are used by the prologue/epilogue code.
+
+(define_insn "pushm"
+  [(unspec [(match_operand 0 "const_int_operand" "i")] UNS_PUSHM)]
+  ""
+  "pushm\t%p0"
+  [(set_attr "flags" "n")]
+  )
+
+(define_insn "popm"
+  [(unspec [(match_operand 0 "const_int_operand" "i")] UNS_POPM)]
+  ""
+  "popm\t%p0"
+  [(set_attr "flags" "n")]
+  )