obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 833 insertions, 0 deletions

diff --git a/gcc/config/sh/predicates.md b/gcc/config/sh/predicates.md
new file mode 100644
index 000000000..b6508b70d
--- /dev/null
+++ b/gcc/config/sh/predicates.md
@@ -0,0 +1,833 @@
+;; Predicate definitions for Renesas / SuperH SH.
+;; Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010
+;; Free Software Foundation, Inc.
+;;
+;; 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/>.
+
+;; TODO: Add a comment here.
+
+(define_predicate "trapping_target_operand"
+  (match_code "if_then_else")
+{
+  rtx cond, mem, res, tar, and_expr;
+
+  if (GET_MODE (op) != PDImode)
+    return 0;
+  cond = XEXP (op, 0);
+  mem = XEXP (op, 1);
+  res = XEXP (op, 2);
+  if (!MEM_P (mem)
+      || (GET_CODE (res) != SIGN_EXTEND && GET_CODE (res) != TRUNCATE))
+    return 0;
+  tar = XEXP (res, 0);
+  if (!rtx_equal_p (XEXP (mem, 0), tar)
+      || GET_MODE (tar) != Pmode)
+    return 0;
+  if (GET_CODE (cond) == CONST)
+    {
+      cond = XEXP (cond, 0);
+      if (!satisfies_constraint_Csy (tar))
+	return 0;
+      if (GET_CODE (tar) == CONST)
+	tar = XEXP (tar, 0);
+    }
+  else if (!arith_reg_operand (tar, VOIDmode)
+	   && ! satisfies_constraint_Csy (tar))
+    return 0;
+  if (GET_CODE (cond) != EQ)
+    return 0;
+  and_expr = XEXP (cond, 0);
+  return (GET_CODE (and_expr) == AND
+	  && rtx_equal_p (XEXP (and_expr, 0), tar)
+	  && CONST_INT_P (XEXP (and_expr, 1))
+	  && CONST_INT_P (XEXP (cond, 1))
+	  && INTVAL (XEXP (and_expr, 1)) == 3
+	  && INTVAL (XEXP (cond, 1)) == 3);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "and_operand"
+  (match_code "subreg,reg,const_int")
+{
+  if (logical_operand (op, mode))
+    return 1;
+
+  /* Check mshflo.l / mshflhi.l opportunities.  */
+  if (TARGET_SHMEDIA
+      && mode == DImode
+      && satisfies_constraint_J16 (op))
+    return 1;
+
+  return 0;
+})
+
+;; Like arith_reg_dest, but this predicate is defined with
+;; define_special_predicate, not define_predicate.
+
+(define_special_predicate "any_arith_reg_dest"
+  (match_code "subreg,reg")
+{
+  return arith_reg_dest (op, mode);
+})
+
+;; Like register_operand, but this predicate is defined with
+;; define_special_predicate, not define_predicate.
+
+(define_special_predicate "any_register_operand"
+  (match_code "subreg,reg")
+{
+  return register_operand (op, mode);
+})
+
+;; Returns 1 if OP is a valid source operand for an arithmetic insn.
+
+(define_predicate "arith_operand"
+  (match_code "subreg,reg,const_int,truncate")
+{
+  if (arith_reg_operand (op, mode))
+    return 1;
+
+  if (TARGET_SHMEDIA)
+    {
+      /* FIXME: We should be checking whether the CONST_INT fits in a
+	 signed 16-bit here, but this causes reload_cse to crash when
+	 attempting to transform a sequence of two 64-bit sets of the
+	 same register from literal constants into a set and an add,
+	 when the difference is too wide for an add.  */
+      if (CONST_INT_P (op)
+	  || satisfies_constraint_Css (op))
+	return 1;
+      else if (GET_CODE (op) == TRUNCATE
+	       && REG_P (XEXP (op, 0))
+	       && ! system_reg_operand (XEXP (op, 0), VOIDmode)
+	       && (mode == VOIDmode || mode == GET_MODE (op))
+	       && (GET_MODE_SIZE (GET_MODE (op))
+		   < GET_MODE_SIZE (GET_MODE (XEXP (op, 0))))
+	       && (! FP_REGISTER_P (REGNO (XEXP (op, 0)))
+		   || GET_MODE_SIZE (GET_MODE (op)) == 4))
+	return register_operand (XEXP (op, 0), VOIDmode);
+      else
+	return 0;
+    }
+  else if (satisfies_constraint_I08 (op))
+    return 1;
+
+  return 0;
+})
+
+;; Like above, but for DImode destinations: forbid paradoxical DImode
+;; subregs, because this would lead to missing sign extensions when
+;; truncating from DImode to SImode.
+
+(define_predicate "arith_reg_dest"
+  (match_code "subreg,reg")
+{
+  if (mode == DImode && GET_CODE (op) == SUBREG
+      && GET_MODE_SIZE (GET_MODE (SUBREG_REG (op))) < 8
+      && TARGET_SHMEDIA)
+    return 0;
+  return arith_reg_operand (op, mode);
+})
+
+;; Returns 1 if OP is a normal arithmetic register.
+
+(define_predicate "arith_reg_operand"
+  (match_code "subreg,reg,sign_extend")
+{
+  if (register_operand (op, mode))
+    {
+      int regno;
+
+      if (REG_P (op))
+	regno = REGNO (op);
+      else if (GET_CODE (op) == SUBREG && REG_P (SUBREG_REG (op)))
+	regno = REGNO (SUBREG_REG (op));
+      else
+	return 1;
+
+      return (regno != T_REG && regno != PR_REG
+	      && ! TARGET_REGISTER_P (regno)
+	      && (regno != FPUL_REG || TARGET_SH4)
+	      && regno != MACH_REG && regno != MACL_REG);
+    }
+  /* Allow a no-op sign extension - compare LOAD_EXTEND_OP.
+     We allow SImode here, as not using an FP register is just a matter of
+     proper register allocation.  */
+  if (TARGET_SHMEDIA
+      && GET_MODE (op) == DImode && GET_CODE (op) == SIGN_EXTEND
+      && GET_MODE (XEXP (op, 0)) == SImode
+      && GET_CODE (XEXP (op, 0)) != SUBREG)
+    return register_operand (XEXP (op, 0), VOIDmode);
+#if 0 /* Can't do this because of PROMOTE_MODE for unsigned vars.  */
+  if (GET_MODE (op) == SImode && GET_CODE (op) == SIGN_EXTEND
+      && GET_MODE (XEXP (op, 0)) == HImode
+      && REG_P (XEXP (op, 0))
+      && REGNO (XEXP (op, 0)) <= LAST_GENERAL_REG)
+    return register_operand (XEXP (op, 0), VOIDmode);
+#endif
+  if (GET_MODE_CLASS (GET_MODE (op)) == MODE_VECTOR_INT
+      && GET_CODE (op) == SUBREG
+      && GET_MODE (SUBREG_REG (op)) == DImode
+      && GET_CODE (SUBREG_REG (op)) == SIGN_EXTEND
+      && GET_MODE (XEXP (SUBREG_REG (op), 0)) == SImode
+      && GET_CODE (XEXP (SUBREG_REG (op), 0)) != SUBREG)
+    return register_operand (XEXP (SUBREG_REG (op), 0), VOIDmode);
+  return 0;
+})
+
+;; Returns 1 if OP is a valid source operand for a compare insn.
+
+(define_predicate "arith_reg_or_0_operand"
+  (match_code "subreg,reg,const_int,const_vector")
+{
+  if (arith_reg_operand (op, mode))
+    return 1;
+
+  if (satisfies_constraint_Z (op))
+    return 1;
+
+  return 0;
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "binary_float_operator"
+  (and (match_code "plus,minus,mult,div")
+       (match_test "GET_MODE (op) == mode")))
+
+;; TODO: Add a comment here.
+
+(define_predicate "binary_logical_operator"
+  (and (match_code "and,ior,xor")
+       (match_test "GET_MODE (op) == mode")))
+
+;; Return 1 of OP is an address suitable for a cache manipulation operation.
+;; MODE has the meaning as in address_operand.
+
+(define_special_predicate "cache_address_operand"
+  (match_code "plus,reg")
+{
+  if (GET_CODE (op) == PLUS)
+    {
+      if (!REG_P (XEXP (op, 0)))
+	return 0;
+      if (!CONST_INT_P (XEXP (op, 1))
+	  || (INTVAL (XEXP (op, 1)) & 31))
+	return 0;
+    }
+  else if (!REG_P (op))
+    return 0;
+  return address_operand (op, mode);
+})
+
+;; Return 1 if OP is a valid source operand for shmedia cmpgt / cmpgtu.
+
+(define_predicate "cmp_operand"
+  (match_code "subreg,reg,const_int")
+{
+  if (satisfies_constraint_N (op))
+    return 1;
+  if (TARGET_SHMEDIA
+      && mode != DImode && GET_CODE (op) == SUBREG
+      && GET_MODE_SIZE (GET_MODE (SUBREG_REG (op))) > 4)
+    return 0;
+  return arith_reg_operand (op, mode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "cmpsi_operand"
+  (match_code "subreg,reg,const_int")
+{
+  if (REG_P (op) && REGNO (op) == T_REG
+      && GET_MODE (op) == SImode
+      && TARGET_SH1)
+    return 1;
+  return arith_operand (op, mode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "commutative_float_operator"
+  (and (match_code "plus,mult")
+       (match_test "GET_MODE (op) == mode")))
+
+;; TODO: Add a comment here.
+
+(define_predicate "equality_comparison_operator"
+  (match_code "eq,ne"))
+
+;; TODO: Add a comment here.
+
+(define_predicate "extend_reg_operand"
+  (match_code "subreg,reg,truncate")
+{
+  return (GET_CODE (op) == TRUNCATE
+	  ? arith_operand
+	  : arith_reg_operand) (op, mode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "extend_reg_or_0_operand"
+  (match_code "subreg,reg,truncate,const_int")
+{
+  return (GET_CODE (op) == TRUNCATE
+	  ? arith_operand
+	  : arith_reg_or_0_operand) (op, mode);
+})
+
+;; Like arith_reg_operand, but this predicate does not accept SIGN_EXTEND.
+
+(define_predicate "ext_dest_operand"
+  (match_code "subreg,reg")
+{
+  return arith_reg_operand (op, mode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "fp_arith_reg_dest"
+  (match_code "subreg,reg")
+{
+  if (mode == DImode && GET_CODE (op) == SUBREG
+      && GET_MODE_SIZE (GET_MODE (SUBREG_REG (op))) < 8)
+    return 0;
+  return fp_arith_reg_operand (op, mode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "fp_arith_reg_operand"
+  (match_code "subreg,reg")
+{
+  if (register_operand (op, mode))
+    {
+      int regno;
+
+      if (REG_P (op))
+	regno = REGNO (op);
+      else if (GET_CODE (op) == SUBREG && REG_P (SUBREG_REG (op)))
+	regno = REGNO (SUBREG_REG (op));
+      else
+	return 1;
+
+      return (regno >= FIRST_PSEUDO_REGISTER
+	      || FP_REGISTER_P (regno));
+    }
+  return 0;
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "fpscr_operand"
+  (match_code "reg")
+{
+  return (REG_P (op)
+	  && (REGNO (op) == FPSCR_REG
+	      || (REGNO (op) >= FIRST_PSEUDO_REGISTER
+		  && !(reload_in_progress || reload_completed)))
+	  && GET_MODE (op) == PSImode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "fpul_operand"
+  (match_code "reg")
+{
+  if (TARGET_SHMEDIA)
+    return fp_arith_reg_operand (op, mode);
+
+  return (REG_P (op)
+	  && (REGNO (op) == FPUL_REG || REGNO (op) >= FIRST_PSEUDO_REGISTER)
+	  && GET_MODE (op) == mode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "general_extend_operand"
+  (match_code "subreg,reg,mem,truncate")
+{
+  return (GET_CODE (op) == TRUNCATE
+	  ? arith_operand
+	  : nonimmediate_operand) (op, mode);
+})
+
+;; Returns 1 if OP can be source of a simple move operation. Same as
+;; general_operand, but a LABEL_REF is valid, PRE_DEC is invalid as
+;; are subregs of system registers.
+
+(define_predicate "general_movsrc_operand"
+  (match_code "subreg,reg,const_int,const_double,mem,symbol_ref,label_ref,const,const_vector")
+{
+  if (MEM_P (op))
+    {
+      rtx inside = XEXP (op, 0);
+      if (GET_CODE (inside) == CONST)
+	inside = XEXP (inside, 0);
+
+      if (GET_CODE (inside) == LABEL_REF)
+	return 1;
+
+      if (GET_CODE (inside) == PLUS
+	  && GET_CODE (XEXP (inside, 0)) == LABEL_REF
+	  && CONST_INT_P (XEXP (inside, 1)))
+	return 1;
+
+      /* Only post inc allowed.  */
+      if (GET_CODE (inside) == PRE_DEC)
+	return 0;
+    }
+
+  if (TARGET_SHMEDIA
+      && (GET_CODE (op) == PARALLEL || GET_CODE (op) == CONST_VECTOR)
+      && sh_rep_vec (op, mode))
+    return 1;
+  if (TARGET_SHMEDIA && 1
+      && GET_CODE (op) == SUBREG && GET_MODE (op) == mode
+      && SUBREG_REG (op) == const0_rtx && subreg_lowpart_p (op))
+    /* FIXME */ abort (); /* return 1; */
+  return general_operand (op, mode);
+})
+
+;; Returns 1 if OP can be a destination of a move. Same as
+;; general_operand, but no preinc allowed.
+
+(define_predicate "general_movdst_operand"
+  (match_code "subreg,reg,mem")
+{
+  /* Only pre dec allowed.  */
+  if (MEM_P (op) && GET_CODE (XEXP (op, 0)) == POST_INC)
+    return 0;
+  if (mode == DImode && TARGET_SHMEDIA && GET_CODE (op) == SUBREG
+      && GET_MODE_SIZE (GET_MODE (SUBREG_REG (op))) < 8
+      && ! (high_life_started || reload_completed))
+    return 0;
+
+  return general_operand (op, mode);
+})
+
+
+;; Returns 1 if OP is a POST_INC on stack pointer register.
+
+(define_predicate "sh_no_delay_pop_operand"
+  (match_code "mem")
+{
+  rtx inside;
+  inside = XEXP (op, 0);
+
+  if (GET_CODE (op) == MEM && GET_MODE (op) == SImode 
+      && GET_CODE (inside) == POST_INC 
+      && GET_CODE (XEXP (inside, 0)) == REG
+      && REGNO (XEXP (inside, 0)) == SP_REG)
+    return 1;
+
+  return 0;
+})
+
+
+;; Returns 1 if OP is a MEM that can be source of a simple move operation.
+
+(define_predicate "unaligned_load_operand"
+  (match_code "mem")
+{
+  rtx inside;
+
+  if (!MEM_P (op) || GET_MODE (op) != mode)
+    return 0;
+
+  inside = XEXP (op, 0);
+
+  if (GET_CODE (inside) == POST_INC)
+    inside = XEXP (inside, 0);
+
+  if (REG_P (inside))
+    return 1;
+
+  return 0;
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "greater_comparison_operator"
+  (match_code "gt,ge,gtu,geu"))
+
+;; TODO: Add a comment here.
+
+(define_predicate "inqhi_operand"
+  (match_code "truncate")
+{
+  if (GET_CODE (op) != TRUNCATE || mode != GET_MODE (op))
+    return 0;
+  op = XEXP (op, 0);
+  /* Can't use true_regnum here because copy_cost wants to know about
+     SECONDARY_INPUT_RELOAD_CLASS.  */
+  return REG_P (op) && FP_REGISTER_P (REGNO (op));
+})
+
+;; TODO: Add a comment here.
+
+(define_special_predicate "int_gpr_dest"
+  (match_code "subreg,reg")
+{
+  enum machine_mode op_mode = GET_MODE (op);
+
+  if (GET_MODE_CLASS (op_mode) != MODE_INT
+      || GET_MODE_SIZE (op_mode) >= UNITS_PER_WORD)
+    return 0;
+  if (! reload_completed)
+    return 0;
+  return true_regnum (op) <= LAST_GENERAL_REG;
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "less_comparison_operator"
+  (match_code "lt,le,ltu,leu"))
+
+;; Returns 1 if OP is a valid source operand for a logical operation.
+
+(define_predicate "logical_operand"
+  (match_code "subreg,reg,const_int")
+{
+  if (TARGET_SHMEDIA
+      && mode != DImode && GET_CODE (op) == SUBREG
+      && GET_MODE_SIZE (GET_MODE (SUBREG_REG (op))) > 4)
+    return 0;
+
+  if (arith_reg_operand (op, mode))
+    return 1;
+
+  if (TARGET_SHMEDIA)
+    {
+      if (satisfies_constraint_I10 (op))
+	return 1;
+      else
+	return 0;
+    }
+  else if (satisfies_constraint_K08 (op))
+    return 1;
+
+  return 0;
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "logical_operator"
+  (match_code "and,ior,xor"))
+
+;; Like arith_reg_operand, but for register source operands of narrow
+;; logical SHMEDIA operations: forbid subregs of DImode / TImode regs.
+
+(define_predicate "logical_reg_operand"
+  (match_code "subreg,reg")
+{
+  if (TARGET_SHMEDIA
+      && GET_CODE (op) == SUBREG
+      && GET_MODE_SIZE (GET_MODE (SUBREG_REG (op))) > 4
+      && mode != DImode)
+    return 0;
+  return arith_reg_operand (op, mode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "mextr_bit_offset"
+  (match_code "const_int")
+{
+  HOST_WIDE_INT i;
+
+  if (!CONST_INT_P (op))
+    return 0;
+  i = INTVAL (op);
+  return i >= 1 * 8 && i <= 7 * 8 && (i & 7) == 0;
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "minuend_operand"
+  (match_code "subreg,reg,truncate,const_int")
+{
+  return op == constm1_rtx || extend_reg_or_0_operand (op, mode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "noncommutative_float_operator"
+  (and (match_code "minus,div")
+       (match_test "GET_MODE (op) == mode")))
+
+;; UNORDERED is only supported on SHMEDIA.
+
+(define_predicate "sh_float_comparison_operator"
+  (ior (match_operand 0 "ordered_comparison_operator")
+       (and (match_test "TARGET_SHMEDIA")
+	    (match_code "unordered"))))
+
+(define_predicate "shmedia_cbranch_comparison_operator"
+  (ior (match_operand 0 "equality_comparison_operator")
+       (match_operand 0 "greater_comparison_operator")))
+
+;; TODO: Add a comment here.
+
+(define_predicate "sh_const_vec"
+  (match_code "const_vector")
+{
+  int i;
+
+  if (GET_CODE (op) != CONST_VECTOR
+      || (GET_MODE (op) != mode && mode != VOIDmode))
+    return 0;
+  i = XVECLEN (op, 0) - 1;
+  for (; i >= 0; i--)
+    if (!CONST_INT_P (XVECEXP (op, 0, i)))
+      return 0;
+  return 1;
+})
+
+;; Determine if OP is a constant vector matching MODE with only one
+;; element that is not a sign extension.  Two byte-sized elements
+;; count as one.
+
+(define_predicate "sh_1el_vec"
+  (match_code "const_vector")
+{
+  int unit_size;
+  int i, last, least, sign_ix;
+  rtx sign;
+
+  if (GET_CODE (op) != CONST_VECTOR
+      || (GET_MODE (op) != mode && mode != VOIDmode))
+    return 0;
+  /* Determine numbers of last and of least significant elements.  */
+  last = XVECLEN (op, 0) - 1;
+  least = TARGET_LITTLE_ENDIAN ? 0 : last;
+  if (!CONST_INT_P (XVECEXP (op, 0, least)))
+    return 0;
+  sign_ix = least;
+  if (GET_MODE_UNIT_SIZE (mode) == 1)
+    sign_ix = TARGET_LITTLE_ENDIAN ? 1 : last - 1;
+  if (!CONST_INT_P (XVECEXP (op, 0, sign_ix)))
+    return 0;
+  unit_size = GET_MODE_UNIT_SIZE (GET_MODE (op));
+  sign = (INTVAL (XVECEXP (op, 0, sign_ix)) >> (unit_size * BITS_PER_UNIT - 1)
+	  ? constm1_rtx : const0_rtx);
+  i = XVECLEN (op, 0) - 1;
+  do
+    if (i != least && i != sign_ix && XVECEXP (op, 0, i) != sign)
+      return 0;
+  while (--i);
+  return 1;
+})
+
+;; Like register_operand, but take into account that SHMEDIA can use
+;; the constant zero like a general register.
+
+(define_predicate "sh_register_operand"
+  (match_code "reg,subreg,const_int,const_double")
+{
+  if (op == CONST0_RTX (mode) && TARGET_SHMEDIA)
+    return 1;
+  return register_operand (op, mode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "sh_rep_vec"
+  (match_code "const_vector,parallel")
+{
+  int i;
+  rtx x, y;
+
+  if ((GET_CODE (op) != CONST_VECTOR && GET_CODE (op) != PARALLEL)
+      || (GET_MODE (op) != mode && mode != VOIDmode))
+    return 0;
+  i = XVECLEN (op, 0) - 2;
+  x = XVECEXP (op, 0, i + 1);
+  if (GET_MODE_UNIT_SIZE (mode) == 1)
+    {
+      y = XVECEXP (op, 0, i);
+      for (i -= 2; i >= 0; i -= 2)
+	if (! rtx_equal_p (XVECEXP (op, 0, i + 1), x)
+	    || ! rtx_equal_p (XVECEXP (op, 0, i), y))
+	  return 0;
+    }
+  else
+    for (; i >= 0; i--)
+      if (XVECEXP (op, 0, i) != x)
+	return 0;
+  return 1;
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "shift_count_operand"
+  (match_code "const_int,const_double,const,symbol_ref,label_ref,subreg,reg,zero_extend,sign_extend")
+{
+  return (CONSTANT_P (op)
+	  ? (CONST_INT_P (op)
+	     ? (unsigned) INTVAL (op) < GET_MODE_BITSIZE (mode)
+	     : nonmemory_operand (op, mode))
+	  : shift_count_reg_operand (op, mode));
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "shift_count_reg_operand"
+  (match_code "subreg,reg,zero_extend,sign_extend")
+{
+  if ((GET_CODE (op) == ZERO_EXTEND || GET_CODE (op) == SIGN_EXTEND
+       || (GET_CODE (op) == SUBREG && SUBREG_BYTE (op) == 0))
+      && (mode == VOIDmode || mode == GET_MODE (op))
+      && GET_MODE_BITSIZE (GET_MODE (XEXP (op, 0))) >= 6
+      && GET_MODE_CLASS (GET_MODE (XEXP (op, 0))) == MODE_INT)
+    {
+      mode = VOIDmode;
+      do
+	op = XEXP (op, 0);
+      while ((GET_CODE (op) == ZERO_EXTEND || GET_CODE (op) == SIGN_EXTEND
+	      || GET_CODE (op) == TRUNCATE)
+	     && GET_MODE_BITSIZE (GET_MODE (XEXP (op, 0))) >= 6
+	     && GET_MODE_CLASS (GET_MODE (XEXP (op, 0))) == MODE_INT);
+
+    }
+  return arith_reg_operand (op, mode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "shift_operator"
+  (match_code "ashift,ashiftrt,lshiftrt"))
+
+;; TODO: Add a comment here.
+
+(define_predicate "symbol_ref_operand"
+  (match_code "symbol_ref"))
+
+;; Same as target_reg_operand, except that label_refs and symbol_refs
+;; are accepted before reload.
+
+(define_special_predicate "target_operand"
+  (match_code "subreg,reg,label_ref,symbol_ref,const,unspec")
+{
+  if (mode != VOIDmode && mode != Pmode)
+    return 0;
+
+  if ((GET_MODE (op) == Pmode || GET_MODE (op) == VOIDmode)
+      && satisfies_constraint_Csy (op))
+    return ! reload_completed;
+
+  return target_reg_operand (op, mode);
+})
+
+;; Accept pseudos and branch target registers.
+
+(define_special_predicate "target_reg_operand"
+  (match_code "subreg,reg")
+{
+  if (mode == VOIDmode
+     ? GET_MODE (op) != Pmode && GET_MODE (op) != PDImode
+     : mode != GET_MODE (op))
+    return 0;
+
+  if (GET_CODE (op) == SUBREG)
+    op = XEXP (op, 0);
+
+  if (!REG_P (op))
+    return 0;
+
+  /* We must protect ourselves from matching pseudos that are virtual
+     register, because they will eventually be replaced with hardware
+     registers that aren't branch-target registers.  */
+  if (REGNO (op) > LAST_VIRTUAL_REGISTER
+      || TARGET_REGISTER_P (REGNO (op)))
+    return 1;
+
+  return 0;
+})
+
+;; TODO: Add a comment here.
+
+(define_special_predicate "trunc_hi_operand"
+  (match_code "subreg,reg,truncate")
+{
+  enum machine_mode op_mode = GET_MODE (op);
+
+  if (op_mode != SImode && op_mode != DImode
+      && op_mode != V4HImode && op_mode != V2SImode)
+    return 0;
+  return extend_reg_operand (op, mode);
+})
+
+;; Return 1 of OP is an address suitable for an unaligned access instruction.
+
+(define_special_predicate "ua_address_operand"
+  (match_code "subreg,reg,plus")
+{
+  if (GET_CODE (op) == PLUS
+      && (! satisfies_constraint_I06 (XEXP (op, 1))))
+    return 0;
+  return address_operand (op, QImode);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "ua_offset"
+  (match_code "const_int")
+{
+  return satisfies_constraint_I06 (op);
+})
+
+;; TODO: Add a comment here.
+
+(define_predicate "unary_float_operator"
+  (and (match_code "abs,neg,sqrt")
+       (match_test "GET_MODE (op) == mode")))
+
+;; Return 1 if OP is a valid source operand for xor.
+
+(define_predicate "xor_operand"
+  (match_code "subreg,reg,const_int")
+{
+  if (CONST_INT_P (op))
+    return (TARGET_SHMEDIA
+	    ? (satisfies_constraint_I06 (op)
+	       || (!can_create_pseudo_p () && INTVAL (op) == 0xff))
+	    : satisfies_constraint_K08 (op));
+  if (TARGET_SHMEDIA
+      && mode != DImode && GET_CODE (op) == SUBREG
+      && GET_MODE_SIZE (GET_MODE (SUBREG_REG (op))) > 4)
+    return 0;
+  return arith_reg_operand (op, mode);
+})
+
+(define_predicate "bitwise_memory_operand"
+  (match_code "mem")
+{
+  if (MEM_P (op))
+    {
+      if (REG_P (XEXP (op, 0)))
+	return 1;
+
+      if (GET_CODE (XEXP (op, 0)) == PLUS
+	  && REG_P (XEXP (XEXP (op, 0), 0))
+	  && satisfies_constraint_K12 (XEXP (XEXP (op, 0), 1)))
+        return 1;
+    }
+  return 0;
+})