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| Current File : //usr/src/contrib/gcc/config/arm/predicates.md |
;; Predicate definitions for ARM and Thumb
;; Copyright (C) 2004 Free Software Foundation, Inc.
;; Contributed by ARM Ltd.
;; 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 2, 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 COPYING. If not, write to
;; the Free Software Foundation, 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
(define_predicate "s_register_operand"
(match_code "reg,subreg")
{
if (GET_CODE (op) == SUBREG)
op = SUBREG_REG (op);
/* We don't consider registers whose class is NO_REGS
to be a register operand. */
/* XXX might have to check for lo regs only for thumb ??? */
return (GET_CODE (op) == REG
&& (REGNO (op) >= FIRST_PSEUDO_REGISTER
|| REGNO_REG_CLASS (REGNO (op)) != NO_REGS));
})
;; Any hard register.
(define_predicate "arm_hard_register_operand"
(match_code "reg")
{
return REGNO (op) < FIRST_PSEUDO_REGISTER;
})
;; Any core register, or any pseudo. */
(define_predicate "arm_general_register_operand"
(match_code "reg,subreg")
{
if (GET_CODE (op) == SUBREG)
op = SUBREG_REG (op);
return (GET_CODE (op) == REG
&& (REGNO (op) <= LAST_ARM_REGNUM
|| REGNO (op) >= FIRST_PSEUDO_REGISTER));
})
(define_predicate "f_register_operand"
(match_code "reg,subreg")
{
if (GET_CODE (op) == SUBREG)
op = SUBREG_REG (op);
/* We don't consider registers whose class is NO_REGS
to be a register operand. */
return (GET_CODE (op) == REG
&& (REGNO (op) >= FIRST_PSEUDO_REGISTER
|| REGNO_REG_CLASS (REGNO (op)) == FPA_REGS));
})
;; Reg, subreg(reg) or const_int.
(define_predicate "reg_or_int_operand"
(ior (match_code "const_int")
(match_operand 0 "s_register_operand")))
(define_predicate "arm_immediate_operand"
(and (match_code "const_int")
(match_test "const_ok_for_arm (INTVAL (op))")))
(define_predicate "arm_neg_immediate_operand"
(and (match_code "const_int")
(match_test "const_ok_for_arm (-INTVAL (op))")))
(define_predicate "arm_not_immediate_operand"
(and (match_code "const_int")
(match_test "const_ok_for_arm (~INTVAL (op))")))
;; Something valid on the RHS of an ARM data-processing instruction
(define_predicate "arm_rhs_operand"
(ior (match_operand 0 "s_register_operand")
(match_operand 0 "arm_immediate_operand")))
(define_predicate "arm_rhsm_operand"
(ior (match_operand 0 "arm_rhs_operand")
(match_operand 0 "memory_operand")))
(define_predicate "arm_add_operand"
(ior (match_operand 0 "arm_rhs_operand")
(match_operand 0 "arm_neg_immediate_operand")))
(define_predicate "arm_addimm_operand"
(ior (match_operand 0 "arm_immediate_operand")
(match_operand 0 "arm_neg_immediate_operand")))
(define_predicate "arm_not_operand"
(ior (match_operand 0 "arm_rhs_operand")
(match_operand 0 "arm_not_immediate_operand")))
;; True if the operand is a memory reference which contains an
;; offsettable address.
(define_predicate "offsettable_memory_operand"
(and (match_code "mem")
(match_test
"offsettable_address_p (reload_completed | reload_in_progress,
mode, XEXP (op, 0))")))
;; True if the operand is a memory operand that does not have an
;; automodified base register (and thus will not generate output reloads).
(define_predicate "call_memory_operand"
(and (match_code "mem")
(and (match_test "GET_RTX_CLASS (GET_CODE (XEXP (op, 0)))
!= RTX_AUTOINC")
(match_operand 0 "memory_operand"))))
(define_predicate "arm_reload_memory_operand"
(and (match_code "mem,reg,subreg")
(match_test "(!CONSTANT_P (op)
&& (true_regnum(op) == -1
|| (GET_CODE (op) == REG
&& REGNO (op) >= FIRST_PSEUDO_REGISTER)))")))
;; True for valid operands for the rhs of an floating point insns.
;; Allows regs or certain consts on FPA, just regs for everything else.
(define_predicate "arm_float_rhs_operand"
(ior (match_operand 0 "s_register_operand")
(and (match_code "const_double")
(match_test "TARGET_FPA && arm_const_double_rtx (op)"))))
(define_predicate "arm_float_add_operand"
(ior (match_operand 0 "arm_float_rhs_operand")
(and (match_code "const_double")
(match_test "TARGET_FPA && neg_const_double_rtx_ok_for_fpa (op)"))))
(define_predicate "vfp_compare_operand"
(ior (match_operand 0 "s_register_operand")
(and (match_code "const_double")
(match_test "arm_const_double_rtx (op)"))))
(define_predicate "arm_float_compare_operand"
(if_then_else (match_test "TARGET_VFP")
(match_operand 0 "vfp_compare_operand")
(match_operand 0 "arm_float_rhs_operand")))
;; True for valid index operands.
(define_predicate "index_operand"
(ior (match_operand 0 "s_register_operand")
(and (match_operand 0 "immediate_operand")
(match_test "(GET_CODE (op) != CONST_INT
|| (INTVAL (op) < 4096 && INTVAL (op) > -4096))"))))
;; True for operators that can be combined with a shift in ARM state.
(define_special_predicate "shiftable_operator"
(and (match_code "plus,minus,ior,xor,and")
(match_test "mode == GET_MODE (op)")))
;; True for logical binary operators.
(define_special_predicate "logical_binary_operator"
(and (match_code "ior,xor,and")
(match_test "mode == GET_MODE (op)")))
;; True for shift operators.
(define_special_predicate "shift_operator"
(and (ior (ior (and (match_code "mult")
(match_test "power_of_two_operand (XEXP (op, 1), mode)"))
(and (match_code "rotate")
(match_test "GET_CODE (XEXP (op, 1)) == CONST_INT
&& ((unsigned HOST_WIDE_INT) INTVAL (XEXP (op, 1))) < 32")))
(match_code "ashift,ashiftrt,lshiftrt,rotatert"))
(match_test "mode == GET_MODE (op)")))
;; True for EQ & NE
(define_special_predicate "equality_operator"
(match_code "eq,ne"))
;; True for comparisons other than LTGT or UNEQ.
(define_special_predicate "arm_comparison_operator"
(match_code "eq,ne,le,lt,ge,gt,geu,gtu,leu,ltu,unordered,ordered,unlt,unle,unge,ungt"))
(define_special_predicate "minmax_operator"
(and (match_code "smin,smax,umin,umax")
(match_test "mode == GET_MODE (op)")))
(define_special_predicate "cc_register"
(and (match_code "reg")
(and (match_test "REGNO (op) == CC_REGNUM")
(ior (match_test "mode == GET_MODE (op)")
(match_test "mode == VOIDmode && GET_MODE_CLASS (GET_MODE (op)) == MODE_CC")))))
(define_special_predicate "dominant_cc_register"
(match_code "reg")
{
if (mode == VOIDmode)
{
mode = GET_MODE (op);
if (GET_MODE_CLASS (mode) != MODE_CC)
return false;
}
return (cc_register (op, mode)
&& (mode == CC_DNEmode
|| mode == CC_DEQmode
|| mode == CC_DLEmode
|| mode == CC_DLTmode
|| mode == CC_DGEmode
|| mode == CC_DGTmode
|| mode == CC_DLEUmode
|| mode == CC_DLTUmode
|| mode == CC_DGEUmode
|| mode == CC_DGTUmode));
})
(define_special_predicate "arm_extendqisi_mem_op"
(and (match_operand 0 "memory_operand")
(match_test "arm_legitimate_address_p (mode, XEXP (op, 0), SIGN_EXTEND,
0)")))
(define_predicate "power_of_two_operand"
(match_code "const_int")
{
HOST_WIDE_INT value = INTVAL (op);
return value != 0 && (value & (value - 1)) == 0;
})
(define_predicate "nonimmediate_di_operand"
(match_code "reg,subreg,mem")
{
if (s_register_operand (op, mode))
return true;
if (GET_CODE (op) == SUBREG)
op = SUBREG_REG (op);
return GET_CODE (op) == MEM && memory_address_p (DImode, XEXP (op, 0));
})
(define_predicate "di_operand"
(ior (match_code "const_int,const_double")
(and (match_code "reg,subreg,mem")
(match_operand 0 "nonimmediate_di_operand"))))
(define_predicate "nonimmediate_soft_df_operand"
(match_code "reg,subreg,mem")
{
if (s_register_operand (op, mode))
return true;
if (GET_CODE (op) == SUBREG)
op = SUBREG_REG (op);
return GET_CODE (op) == MEM && memory_address_p (DFmode, XEXP (op, 0));
})
(define_predicate "soft_df_operand"
(ior (match_code "const_double")
(and (match_code "reg,subreg,mem")
(match_operand 0 "nonimmediate_soft_df_operand"))))
(define_predicate "const_shift_operand"
(and (match_code "const_int")
(ior (match_operand 0 "power_of_two_operand")
(match_test "((unsigned HOST_WIDE_INT) INTVAL (op)) < 32"))))
(define_special_predicate "load_multiple_operation"
(match_code "parallel")
{
HOST_WIDE_INT count = XVECLEN (op, 0);
int dest_regno;
rtx src_addr;
HOST_WIDE_INT i = 1, base = 0;
rtx elt;
if (count <= 1
|| GET_CODE (XVECEXP (op, 0, 0)) != SET)
return false;
/* Check to see if this might be a write-back. */
if (GET_CODE (SET_SRC (elt = XVECEXP (op, 0, 0))) == PLUS)
{
i++;
base = 1;
/* Now check it more carefully. */
if (GET_CODE (SET_DEST (elt)) != REG
|| GET_CODE (XEXP (SET_SRC (elt), 0)) != REG
|| GET_CODE (XEXP (SET_SRC (elt), 1)) != CONST_INT
|| INTVAL (XEXP (SET_SRC (elt), 1)) != (count - 1) * 4)
return false;
}
/* Perform a quick check so we don't blow up below. */
if (count <= i
|| GET_CODE (XVECEXP (op, 0, i - 1)) != SET
|| GET_CODE (SET_DEST (XVECEXP (op, 0, i - 1))) != REG
|| GET_CODE (SET_SRC (XVECEXP (op, 0, i - 1))) != MEM)
return false;
dest_regno = REGNO (SET_DEST (XVECEXP (op, 0, i - 1)));
src_addr = XEXP (SET_SRC (XVECEXP (op, 0, i - 1)), 0);
for (; i < count; i++)
{
elt = XVECEXP (op, 0, i);
if (GET_CODE (elt) != SET
|| GET_CODE (SET_DEST (elt)) != REG
|| GET_MODE (SET_DEST (elt)) != SImode
|| REGNO (SET_DEST (elt)) != (unsigned int)(dest_regno + i - base)
|| GET_CODE (SET_SRC (elt)) != MEM
|| GET_MODE (SET_SRC (elt)) != SImode
|| GET_CODE (XEXP (SET_SRC (elt), 0)) != PLUS
|| !rtx_equal_p (XEXP (XEXP (SET_SRC (elt), 0), 0), src_addr)
|| GET_CODE (XEXP (XEXP (SET_SRC (elt), 0), 1)) != CONST_INT
|| INTVAL (XEXP (XEXP (SET_SRC (elt), 0), 1)) != (i - base) * 4)
return false;
}
return true;
})
(define_special_predicate "store_multiple_operation"
(match_code "parallel")
{
HOST_WIDE_INT count = XVECLEN (op, 0);
int src_regno;
rtx dest_addr;
HOST_WIDE_INT i = 1, base = 0;
rtx elt;
if (count <= 1
|| GET_CODE (XVECEXP (op, 0, 0)) != SET)
return false;
/* Check to see if this might be a write-back. */
if (GET_CODE (SET_SRC (elt = XVECEXP (op, 0, 0))) == PLUS)
{
i++;
base = 1;
/* Now check it more carefully. */
if (GET_CODE (SET_DEST (elt)) != REG
|| GET_CODE (XEXP (SET_SRC (elt), 0)) != REG
|| GET_CODE (XEXP (SET_SRC (elt), 1)) != CONST_INT
|| INTVAL (XEXP (SET_SRC (elt), 1)) != (count - 1) * 4)
return false;
}
/* Perform a quick check so we don't blow up below. */
if (count <= i
|| GET_CODE (XVECEXP (op, 0, i - 1)) != SET
|| GET_CODE (SET_DEST (XVECEXP (op, 0, i - 1))) != MEM
|| GET_CODE (SET_SRC (XVECEXP (op, 0, i - 1))) != REG)
return false;
src_regno = REGNO (SET_SRC (XVECEXP (op, 0, i - 1)));
dest_addr = XEXP (SET_DEST (XVECEXP (op, 0, i - 1)), 0);
for (; i < count; i++)
{
elt = XVECEXP (op, 0, i);
if (GET_CODE (elt) != SET
|| GET_CODE (SET_SRC (elt)) != REG
|| GET_MODE (SET_SRC (elt)) != SImode
|| REGNO (SET_SRC (elt)) != (unsigned int)(src_regno + i - base)
|| GET_CODE (SET_DEST (elt)) != MEM
|| GET_MODE (SET_DEST (elt)) != SImode
|| GET_CODE (XEXP (SET_DEST (elt), 0)) != PLUS
|| !rtx_equal_p (XEXP (XEXP (SET_DEST (elt), 0), 0), dest_addr)
|| GET_CODE (XEXP (XEXP (SET_DEST (elt), 0), 1)) != CONST_INT
|| INTVAL (XEXP (XEXP (SET_DEST (elt), 0), 1)) != (i - base) * 4)
return false;
}
return true;
})
(define_special_predicate "multi_register_push"
(match_code "parallel")
{
if ((GET_CODE (XVECEXP (op, 0, 0)) != SET)
|| (GET_CODE (SET_SRC (XVECEXP (op, 0, 0))) != UNSPEC)
|| (XINT (SET_SRC (XVECEXP (op, 0, 0)), 1) != UNSPEC_PUSH_MULT))
return false;
return true;
})
;;-------------------------------------------------------------------------
;;
;; Thumb predicates
;;
(define_predicate "thumb_cmp_operand"
(ior (and (match_code "reg,subreg")
(match_operand 0 "s_register_operand"))
(and (match_code "const_int")
(match_test "((unsigned HOST_WIDE_INT) INTVAL (op)) < 256"))))
(define_predicate "thumb_cmpneg_operand"
(and (match_code "const_int")
(match_test "INTVAL (op) < 0 && INTVAL (op) > -256")))
;; Return TRUE if a result can be stored in OP without clobbering the
;; condition code register. Prior to reload we only accept a
;; register. After reload we have to be able to handle memory as
;; well, since a pseudo may not get a hard reg and reload cannot
;; handle output-reloads on jump insns.
;; We could possibly handle mem before reload as well, but that might
;; complicate things with the need to handle increment
;; side-effects.
(define_predicate "thumb_cbrch_target_operand"
(and (match_code "reg,subreg,mem")
(ior (match_operand 0 "s_register_operand")
(and (match_test "reload_in_progress || reload_completed")
(match_operand 0 "memory_operand")))))
;;-------------------------------------------------------------------------
;;
;; MAVERICK predicates
;;
(define_predicate "cirrus_register_operand"
(match_code "reg,subreg")
{
if (GET_CODE (op) == SUBREG)
op = SUBREG_REG (op);
return (GET_CODE (op) == REG
&& (REGNO_REG_CLASS (REGNO (op)) == CIRRUS_REGS
|| REGNO_REG_CLASS (REGNO (op)) == GENERAL_REGS));
})
(define_predicate "cirrus_fp_register"
(match_code "reg,subreg")
{
if (GET_CODE (op) == SUBREG)
op = SUBREG_REG (op);
return (GET_CODE (op) == REG
&& (REGNO (op) >= FIRST_PSEUDO_REGISTER
|| REGNO_REG_CLASS (REGNO (op)) == CIRRUS_REGS));
})
(define_predicate "cirrus_shift_const"
(and (match_code "const_int")
(match_test "((unsigned HOST_WIDE_INT) INTVAL (op)) < 64")))