--- /dev/null
+;; Predicate definitions for Motorola 68000.
+;; Copyright (C) 2005, 2007 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/>.
+
+;; Special case of a general operand that's used as a source
+;; operand. Use this to permit reads from PC-relative memory when
+;; -mpcrel is specified.
+
+(define_predicate "general_src_operand"
+ (match_code "const_int,const_double,const,symbol_ref,label_ref,subreg,reg,mem")
+{
+ if (TARGET_PCREL
+ && GET_CODE (op) == MEM
+ && (GET_CODE (XEXP (op, 0)) == SYMBOL_REF
+ || GET_CODE (XEXP (op, 0)) == LABEL_REF
+ || GET_CODE (XEXP (op, 0)) == CONST))
+ return 1;
+ return general_operand (op, mode);
+})
+
+;; Special case of a nonimmediate operand that's used as a source. Use
+;; this to permit reads from PC-relative memory when -mpcrel is
+;; specified.
+
+(define_predicate "nonimmediate_src_operand"
+ (match_code "subreg,reg,mem")
+{
+ if (TARGET_PCREL && GET_CODE (op) == MEM
+ && (GET_CODE (XEXP (op, 0)) == SYMBOL_REF
+ || GET_CODE (XEXP (op, 0)) == LABEL_REF
+ || GET_CODE (XEXP (op, 0)) == CONST))
+ return 1;
+ return nonimmediate_operand (op, mode);
+})
+
+;; Special case of a memory operand that's used as a source. Use this
+;; to permit reads from PC-relative memory when -mpcrel is specified.
+
+(define_predicate "memory_src_operand"
+ (match_code "subreg,mem")
+{
+ if (TARGET_PCREL && GET_CODE (op) == MEM
+ && (GET_CODE (XEXP (op, 0)) == SYMBOL_REF
+ || GET_CODE (XEXP (op, 0)) == LABEL_REF
+ || GET_CODE (XEXP (op, 0)) == CONST))
+ return 1;
+ return memory_operand (op, mode);
+})
+
+;; Similar to general_operand, but exclude stack_pointer_rtx.
+
+(define_predicate "not_sp_operand"
+ (match_code "subreg,reg,mem")
+{
+ return op != stack_pointer_rtx && nonimmediate_operand (op, mode);
+})
+
+;; Predicate that accepts only a pc-relative address. This is needed
+;; because pc-relative addresses don't satisfy the predicate
+;; "general_src_operand".
+
+(define_predicate "pcrel_address"
+ (match_code "symbol_ref,label_ref,const"))
+
+;; Accept integer operands in the range 0..0xffffffff. We have to
+;; check the range carefully since this predicate is used in DImode
+;; contexts. Also, we need some extra crud to make it work when
+;; hosted on 64-bit machines.
+
+(define_predicate "const_uint32_operand"
+ (match_code "const_int,const_double")
+{
+ /* It doesn't make sense to ask this question with a mode that is
+ not larger than 32 bits. */
+ gcc_assert (GET_MODE_BITSIZE (mode) > 32);
+
+#if HOST_BITS_PER_WIDE_INT > 32
+ /* All allowed constants will fit a CONST_INT. */
+ return (GET_CODE (op) == CONST_INT
+ && (INTVAL (op) >= 0 && INTVAL (op) <= 0xffffffffL));
+#else
+ return (GET_CODE (op) == CONST_INT
+ || (GET_CODE (op) == CONST_DOUBLE && CONST_DOUBLE_HIGH (op) == 0));
+#endif
+})
+
+;; Accept integer operands in the range -0x80000000..0x7fffffff. We
+;; have to check the range carefully since this predicate is used in
+;; DImode contexts.
+
+(define_predicate "const_sint32_operand"
+ (match_code "const_int")
+{
+ /* It doesn't make sense to ask this question with a mode that is
+ not larger than 32 bits. */
+ gcc_assert (GET_MODE_BITSIZE (mode) > 32);
+
+ /* All allowed constants will fit a CONST_INT. */
+ return (GET_CODE (op) == CONST_INT
+ && (INTVAL (op) >= (-0x7fffffff - 1) && INTVAL (op) <= 0x7fffffff));
+})
+
+;; Return true if X is a valid comparison operator for the dbcc
+;; instruction. Note it rejects floating point comparison
+;; operators. (In the future we could use Fdbcc). It also rejects
+;; some comparisons when CC_NO_OVERFLOW is set.
+
+(define_predicate "valid_dbcc_comparison_p"
+ (and (match_code "eq,ne,gtu,ltu,geu,leu,gt,lt,ge,le")
+ (match_test "valid_dbcc_comparison_p_2 (op, mode)")))
+
+;; Check for sign_extend or zero_extend. Used for bit-count operands.
+
+(define_predicate "extend_operator"
+ (match_code "sign_extend,zero_extend"))
+
+;; Returns true if OP is either a symbol reference or a sum of a
+;; symbol reference and a constant.
+
+(define_predicate "symbolic_operand"
+ (match_code "symbol_ref,label_ref,const")
+{
+ switch (GET_CODE (op))
+ {
+ case SYMBOL_REF:
+ case LABEL_REF:
+ return true;
+
+ case CONST:
+ op = XEXP (op, 0);
+ return ((GET_CODE (XEXP (op, 0)) == SYMBOL_REF
+ || GET_CODE (XEXP (op, 0)) == LABEL_REF)
+ && GET_CODE (XEXP (op, 1)) == CONST_INT);
+
+#if 0 /* Deleted, with corresponding change in m68k.h,
+ so as to fit the specs. No CONST_DOUBLE is ever symbolic. */
+ case CONST_DOUBLE:
+ return GET_MODE (op) == mode;
+#endif
+
+ default:
+ return false;
+ }
+})
+
+;; A constant that can be used the address in a call insn
+(define_predicate "const_call_operand"
+ (ior (match_operand 0 "const_int_operand")
+ (and (match_test "m68k_symbolic_call != NULL")
+ (match_operand 0 "symbolic_operand"))))
+
+;; An operand that can be used as the address in a call insn.
+(define_predicate "call_operand"
+ (ior (match_operand 0 "const_call_operand")
+ (match_operand 0 "register_operand")))
+
+;; A constant that can be used the address in a sibcall insn
+(define_predicate "const_sibcall_operand"
+ (ior (match_operand 0 "const_int_operand")
+ (and (match_test "m68k_symbolic_jump != NULL")
+ (match_operand 0 "symbolic_operand"))))
+
+;; An operand that can be used as the address in a sibcall insn.
+(define_predicate "sibcall_operand"
+ (ior (match_operand 0 "const_sibcall_operand")
+ (and (match_code "reg")
+ (match_test "REGNO (op) == STATIC_CHAIN_REGNUM"))))
+
+;; TODO: Add a comment here.
+
+(define_predicate "post_inc_operand"
+ (and (match_code "mem")
+ (match_test "GET_CODE (XEXP (op, 0)) == POST_INC")))
+
+;; TODO: Add a comment here.
+
+(define_predicate "pre_dec_operand"
+ (and (match_code "mem")
+ (match_test "GET_CODE (XEXP (op, 0)) == PRE_DEC")))
+
+;; An operand for movsi_const0 pattern.
+(define_predicate "movsi_const0_operand"
+ (and (match_operand 0 "nonimmediate_operand")
+ (match_test "(TARGET_68010 || TARGET_COLDFIRE)
+ || !(MEM_P (op) && MEM_VOLATILE_P (op))")))
+
+;; A non-symbolic call operand.
+;; We need to special case 'const_int' to ignore its mode while matching.
+(define_predicate "non_symbolic_call_operand"
+ (and (match_operand 0 "call_operand")
+ (ior (and (match_code "const_int")
+ (match_test "!symbolic_operand (op, mode)"))
+ (match_test "!symbolic_operand (op,mode)"))))
+
+;; Special case of general_src_operand, which rejects a few fp
+;; constants (which we prefer in registers) before reload.
+
+(define_predicate "fp_src_operand"
+ (match_operand 0 "general_src_operand")
+{
+ return !CONSTANT_P (op)
+ || (TARGET_68881
+ && (!standard_68881_constant_p (op)
+ || reload_in_progress
+ || reload_completed));
+})
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