Subversion Repositories openrisc_2011-10-31

;; GCC machine description for CRIS cpu cores.

;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,

;; 2008, 2009  Free Software Foundation, Inc.

;; Contributed by Axis Communications.

;; 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

;; .

;; The original PO technology requires these to be ordered by speed,

;; so that assigner will pick the fastest.

;; See files "md.texi" and "rtl.def" for documentation on define_insn,

;; match_*, et. al.

;;

;; The function cris_notice_update_cc in cris.c handles condition code

;; updates for most instructions, helped by the "cc" attribute.

;; There are several instructions that are orthogonal in size, and seems

;; they could be matched by a single pattern without a specified size

;; for the operand that is orthogonal.  However, this did not work on

;; gcc-2.7.2 (and probably not on gcc-2.8.1), relating to that when a

;; constant is substituted into an operand, the actual mode must be

;; deduced from the pattern.  There is reasonable hope that that has been

;; fixed, so FIXME: try again.

;; You will notice that three-operand alternatives ("=r", "r", "!To")

;; are marked with a "!" constraint modifier to avoid being reloaded

;; into.  This is because gcc would otherwise prefer to use the constant

;; pool and its offsettable address instead of reloading to an

;; ("=r", "0", "i") alternative.  Also, the constant-pool support was not

;; only suboptimal but also buggy in 2.7.2, ??? maybe only in 2.6.3.

;; All insns that look like (set (...) (plus (...) (reg:SI 8)))

;; get problems when reloading r8 (frame pointer) to r14 + offs (stack

;; pointer).  Thus the instructions that get into trouble have specific

;; checks against matching frame_pointer_rtx.

;; ??? But it should be re-checked for gcc > 2.7.2

;; FIXME: This changed some time ago (from 2000-03-16) for gcc-2.9x.

;; FIXME: When PIC, all [rX=rY+S] could be enabled to match

;; [rX=gotless_symbol].

;; The movsi for a gotless symbol could be split (post reload).

(define_constants

  [

   ;; PLT reference from call expansion: operand 0 is the address,

   ;; the mode is VOIDmode.  Always wrapped in CONST.

   ;; The value is relative to the GOT.

   (CRIS_UNSPEC_PLT_GOTREL 0)

   ;; PLT reference from call expansion: operand 0 is the address,

   ;; the mode is VOIDmode.  Always wrapped in CONST.

   ;; The value is relative to the PC.  It's arch-dependent whether

   ;; the offset counts from the start or the end of the current item.

   (CRIS_UNSPEC_PLT_PCREL 1)

   ;; The address of the global offset table as a source operand.

   (CRIS_UNSPEC_GOT 2)

   ;; The offset from the global offset table to the operand.

   (CRIS_UNSPEC_GOTREL 3)

   ;; The PC-relative offset to the operand.  It's arch-dependent whether

   ;; the offset counts from the start or the end of the current item.

   (CRIS_UNSPEC_PCREL 4)

   ;; The index into the global offset table of a symbol, while

   ;; also generating a GOT entry for the symbol.

   (CRIS_UNSPEC_GOTREAD 5)

   ;; Similar to CRIS_UNSPEC_GOTREAD, but also generating a PLT entry.

   (CRIS_UNSPEC_PLTGOTREAD 6)

   ;; Condition for v32 casesi jump, since it needs to have if_then_else

   ;; form with register as one branch and default label as other.

   ;; Operand 0 is const_int 0.

   (CRIS_UNSPEC_CASESI 7)

   ;; Stack frame deallocation barrier.

   (CRIS_UNSPEC_FRAME_DEALLOC 8)

   ;; Swap all 32 bits of the operand; 31 <=> 0, 30 <=> 1...

   (CRIS_UNSPEC_SWAP_BITS 9)

  ])

;; Register numbers.

(define_constants

  [(CRIS_GOT_REGNUM 0)

   (CRIS_STATIC_CHAIN_REGNUM 7)

   (CRIS_FP_REGNUM 8)

   (CRIS_SP_REGNUM 14)

   (CRIS_ACR_REGNUM 15)

   (CRIS_SRP_REGNUM 16)

   (CRIS_MOF_REGNUM 17)

   (CRIS_AP_REGNUM 18)

   (CRIS_CC0_REGNUM 19)]

)

;; We need an attribute to define whether an instruction can be put in

;; a branch-delay slot or not, and whether it has a delay slot.

;;

;; Branches and return instructions have a delay slot, and cannot

;; themselves be put in a delay slot.  This has changed *for short

;; branches only* between architecture variants, but the possible win

;; is presumed negligible compared to the added complexity of the machine

;; description: one would have to add always-correct infrastructure to

;; distinguish short branches.

;;

;; Whether an instruction can be put in a delay slot depends on the

;; instruction (all short instructions except jumps and branches)

;; and the addressing mode (must not be prefixed or referring to pc).

;; In short, any "slottable" instruction must be 16 bit and not refer

;; to pc, or alter it.

;;

;; The possible values are "yes", "no", "has_slot", "has_return_slot"

;; and "has_call_slot".

;; Yes/no tells whether the insn is slottable or not.  Has_call_slot means

;; that the insn is a call insn, which for CRIS v32 has a delay-slot.

;; Of special concern is that no RTX_FRAME_RELATED insn must go in that

;; call delay slot, as it's located in the address *after* the call insn,

;; and the unwind machinery doesn't know about delay slots.

;; Has_slot means that the insn is a branch insn (which are

;; not considered slottable since that is generally true).  Having the

;; seemingly illogical value "has_slot" means we do not have to add

;; another attribute just to say that an insn has a delay-slot, since it

;; also infers that it is not slottable.  Better names for the attribute

;; were found to be longer and not add readability to the machine

;; description.

;; Has_return_slot is similar, for the return insn.

;;

;; The default that is defined here for this attribute is "no", not

;; slottable, not having a delay-slot, so there's no need to worry about

;; it being wrong for non-branch and return instructions.

;;  The default could depend on the kind of insn and the addressing

;; mode, but that would need more attributes and hairier, more error

;; prone code.

;;

;;  There is an extra memory constraint, 'Q', which recognizes an indirect

;; register.  The constraints 'Q' and '>' together match all possible

;; memory operands that are slottable.

;;  For other operands, you need to check if it has a valid "slottable"

;; quick-immediate operand, where the particular signedness-variation

;; may match the constraints 'I' or 'J'.), and include it in the

;; constraint pattern for the slottable pattern.  An alternative using

;; only "r" constraints is most often slottable.

(define_attr "slottable" "no,yes,has_slot,has_return_slot,has_call_slot"

  (const_string "no"))

;; We also need attributes to sanely determine the condition code

;; state.  See cris_notice_update_cc for how this is used.

(define_attr "cc" "none,clobber,normal,noov32,rev" (const_string "normal"))

;; At the moment, this attribute is just used to help bb-reorder do its

;; work; the default 0 doesn't help it.  Many insns have other lengths,

;; though none are shorter.

(define_attr "length" "" (const_int 2))

;; A branch has one delay-slot.  The instruction in the

;; delay-slot is always executed, independent of whether the branch is

;; taken or not.  Note that besides setting "slottable" to "has_slot",

;; there also has to be a "%#" at the end of a "delayed" instruction

;; output pattern (for "jump" this means "ba %l0%#"), so print_operand can

;; catch it and print a "nop" if necessary.  This method was stolen from

;; sparc.md.

(define_delay (eq_attr "slottable" "has_slot")

  [(eq_attr "slottable" "yes") (nil) (nil)])

;; We can't put prologue insns in call-insn delay-slots when

;; DWARF2 unwind info is emitted, because the unwinder matches the

;; address after the insn.  It must see the return address of a call at

;; a position at least *one byte after* the insn, or it'll think that

;; the insn hasn't been executed.  If the insn is in a delay-slot of a

;; call, it's just *exactly* after the insn.

(define_delay (eq_attr "slottable" "has_call_slot")

  [(and (eq_attr "slottable" "yes")

        (ior (eq (symbol_ref "RTX_FRAME_RELATED_P (insn)")

                 (const_int 0))

             (eq (symbol_ref "flag_exceptions")

                 (const_int 0))))

   (nil) (nil)])

;; The insn in the return insn slot must not be the

;; return-address-register restore.  FIXME: Use has_slot and express

;; as a parallel with a use of the return-address-register (currently

;; only SRP).  However, this requires an amount of fixing tests for

;; naked RETURN in middle-end.

(define_delay (eq_attr "slottable" "has_return_slot")

  [(and (eq_attr "slottable" "yes")

        (eq (symbol_ref "dead_or_set_regno_p (insn, CRIS_SRP_REGNUM)")

            (const_int 0)))

   (nil) (nil)])

;; Iterator definitions.

;; For the "usual" pattern size alternatives.

(define_mode_iterator BWD [SI HI QI])

(define_mode_iterator WD [SI HI])

(define_mode_iterator BW [HI QI])

(define_mode_attr S [(SI "HI") (HI "QI")])

(define_mode_attr s [(SI "hi") (HI "qi")])

(define_mode_attr m [(SI ".d") (HI ".w") (QI ".b")])

(define_mode_attr mm [(SI ".w") (HI ".b")])

(define_mode_attr nbitsm1 [(SI "31") (HI "15") (QI "7")])

;; For the sign_extend+zero_extend variants.

(define_code_iterator szext [sign_extend zero_extend])

(define_code_attr u [(sign_extend "") (zero_extend "u")])

(define_code_attr su [(sign_extend "s") (zero_extend "u")])

;; For the shift variants.

(define_code_iterator shift [ashiftrt lshiftrt ashift])

(define_code_iterator shiftrt [ashiftrt lshiftrt])

(define_code_attr shlr [(ashiftrt "ashr") (lshiftrt "lshr") (ashift "ashl")])

(define_code_attr slr [(ashiftrt "asr") (lshiftrt "lsr") (ashift "lsl")])

(define_code_iterator ncond [eq ne gtu ltu geu leu])

(define_code_iterator ocond [gt le])

(define_code_iterator rcond [lt ge])

(define_code_attr CC [(eq "eq") (ne "ne") (gt "gt") (gtu "hi") (lt "lt")

                      (ltu "lo") (ge "ge") (geu "hs") (le "le") (leu "ls")])

(define_code_attr rCC [(eq "ne") (ne "eq") (gt "le") (gtu "ls") (lt "ge")

                       (ltu "hs") (ge "lt") (geu "lo") (le "gt") (leu "hi")])

(define_code_attr oCC [(lt "mi") (ge "pl")])

(define_code_attr roCC [(lt "pl") (ge "mi")])

;; Operand and operator predicates.

(include "predicates.md")

;; Test insns.

;; No test insns with side-effect on the mem addressing.

;;

;; See note on cmp-insns with side-effects (or lack of them)

;; Normal named test patterns from SI on.

(define_insn "*tstsi"

  [(set (cc0)

        (compare (match_operand:SI 0 "nonimmediate_operand" "r,Q>,m")

                 (const_int 0)))]

  ""

{

  if (which_alternative == 0 && TARGET_V32)

    return "cmpq 0,%0";

  return "test.d %0";

}

  [(set_attr "slottable" "yes,yes,no")])

(define_insn "*tst_cmp"

  [(set (cc0)

        (compare (match_operand:BW 0 "nonimmediate_operand" "r,Q>,m")

                 (const_int 0)))]

  "cris_cc0_user_requires_cmp (insn)"

  "@

   cmp 0,%0

   test %0

   test %0"

  [(set_attr "slottable" "no,yes,no")])

(define_insn "*tst_non_cmp"

  [(set (cc0)

        (compare (match_operand:BW 0 "nonimmediate_operand" "r,Q>,m")

                 (const_int 0)))]

  "!cris_cc0_user_requires_cmp (insn)"

  "@

   move %0,%0

   test %0

   test %0"

  [(set_attr "slottable" "yes,yes,no")

   (set_attr "cc" "noov32,*,*")])

;; It seems that the position of the sign-bit and the fact that 0.0 is

;; all 0-bits would make "tstsf" a straight-forward implementation;

;; either "test.d" it for positive/negative or "btstq 30,r" it for

;; zeroness.

;;

;; FIXME: Do that some time; check next_cc0_user to determine if

;; zero or negative is tested for.

;; Compare insns.

;; We could optimize the sizes of the immediate operands for various

;; cases, but that is not worth it because of the very little usage of

;; DImode for anything else but a structure/block-mode.  Just do the

;; obvious stuff for the straight-forward constraint letters.

(define_insn "*cmpdi_non_v32"

  [(set (cc0)

        (compare (match_operand:DI 0 "nonimmediate_operand" "rm,r,r,r,r,r,r,o")

                 (match_operand:DI 1 "general_operand" "M,Kc,I,P,n,r,o,r")))]

  "!TARGET_V32"

  "@

   test.d %M0\;ax\;test.d %H0

   cmpq %1,%M0\;ax\;cmpq 0,%H0

   cmpq %1,%M0\;ax\;cmpq -1,%H0

   cmp%e1.%z1 %1,%M0\;ax\;cmpq %H1,%H0

   cmp.d %M1,%M0\;ax\;cmp.d %H1,%H0

   cmp.d %M1,%M0\;ax\;cmp.d %H1,%H0

   cmp.d %M1,%M0\;ax\;cmp.d %H1,%H0

   cmp.d %M0,%M1\;ax\;cmp.d %H0,%H1")

(define_insn "*cmpdi_v32"

  [(set (cc0)

        (compare (match_operand:DI 0 "register_operand"  "r,r,r,r,r")

                 (match_operand:DI 1 "nonmemory_operand" "Kc,I,P,n,r")))]

  "TARGET_V32"

  "@

   cmpq %1,%M0\;ax\;cmpq 0,%H0

   cmpq %1,%M0\;ax\;cmpq -1,%H0

   cmp%e1.%z1 %1,%M0\;ax\;cmpq %H1,%H0

   cmp.d %M1,%M0\;ax\;cmp.d %H1,%H0

   cmp.d %M1,%M0\;ax\;cmp.d %H1,%H0")

;; Note that compare insns with side effect addressing mode (e.g.):

;;

;; cmp.S [rx=ry+i],rz;

;; cmp.S [%3=%1+%2],%0

;;

;; are *not* usable for gcc since the reloader *does not accept*

;; cc0-changing insns with side-effects other than setting the condition

;; codes.  The reason is that the reload stage *may* cause another insn to

;; be output after the main instruction, in turn invalidating cc0 for the

;; insn using the test.  (This does not apply to the CRIS case, since a

;; reload for output -- move to memory -- does not change the condition

;; code.  Unfortunately we have no way to describe that at the moment.  I

;; think code would improve being in the order of one percent faster.

;; We have cmps and cmpu (compare reg w. sign/zero extended mem).

;; These are mostly useful for compares in SImode, using 8 or 16-bit

;; constants, but sometimes gcc will find its way to use it for other

;; (memory) operands.  Avoid side-effect patterns, though (see above).

(define_insn "*cmp_ext"

  [(set (cc0)

        (compare

         (match_operand:SI 0 "register_operand" "r,r")

         (match_operator:SI 2 "cris_extend_operator"

                         [(match_operand:BW 1 "memory_operand" "Q>,m")])))]

  ""

  "cmp%e2 %1,%0"

  [(set_attr "slottable" "yes,no")])

;; Swap operands; it seems the canonical look (if any) is not enforced.

;;

;; FIXME: Investigate that.

(define_insn "*cmp_swapext"

  [(set (cc0)

        (compare

         (match_operator:SI 2 "cris_extend_operator"

                            [(match_operand:BW 0 "memory_operand" "Q>,m")])

         (match_operand:SI 1 "register_operand" "r,r")))]

  ""

  "cmp%e2 %0,%1"

  [(set_attr "slottable" "yes,no")

   (set_attr "cc" "rev")])

;; The "normal" compare patterns, from SI on.  Special-cases with zero

;; are covered above.

(define_insn "*cmpsi"

  [(set (cc0)

        (compare

         (match_operand:SI 0 "nonimmediate_operand" "r,r,r, Q>,r,r,m")

         (match_operand:SI 1 "general_operand"      "I,r,Q>,r, P,g,r")))]

  ""

  "@

   cmpq %1,%0

   cmp.d %1,%0

   cmp.d %1,%0

   cmp.d %0,%1

   cmp%e1.%z1 %1,%0

   cmp.d %1,%0

   cmp.d %0,%1"

  [(set_attr "slottable" "yes,yes,yes,yes,no,no,no")

   (set_attr "cc" "normal,normal,normal,rev,normal,normal,rev")])

(define_insn "*cmp"

  [(set (cc0)

        (compare (match_operand:BW 0 "nonimmediate_operand" "r,r, Q>,r,m")

                 (match_operand:BW 1 "general_operand"      "r,Q>,r, g,r")))]

  ""

  "@

   cmp %1,%0

   cmp %1,%0

   cmp %0,%1

   cmp %1,%0

   cmp %0,%1"

  [(set_attr "slottable" "yes,yes,yes,no,no")

   (set_attr "cc" "normal,normal,rev,normal,rev")])

;; Pattern matching the BTST insn.

;; It is useful for "if (i & val)" constructs, where val is an exact

;; power of 2, or if val + 1 is a power of two, where we check for a bunch

;; of zeros starting at bit 0).

;; SImode.  This mode is the only one needed, since gcc automatically

;; extends subregs for lower-size modes.  FIXME: Add testcase.

(define_insn "*btst"

  [(set (cc0)

        (compare

         (zero_extract:SI

          (match_operand:SI 0 "nonmemory_operand" "r, r,r, r,r, r,Kp")

          (match_operand:SI 1 "const_int_operand" "Kc,n,Kc,n,Kc,n,n")

          (match_operand:SI 2 "nonmemory_operand" "M, M,Kc,n,r, r,r"))

         (const_int 0)))]

  ;; Either it is a single bit, or consecutive ones starting at 0.

  ;; The btst ones depend on stuff in NOTICE_UPDATE_CC.

  "CONST_INT_P (operands[1])

   && (operands[1] == const1_rtx || operands[2] == const0_rtx)

   && (REG_S_P (operands[0])

       || (operands[1] == const1_rtx

           && REG_S_P (operands[2])

           && CONST_INT_P (operands[0])

           && exact_log2 (INTVAL (operands[0])) >= 0))

   && !TARGET_CCINIT"

;; The next-to-last "&&" condition above should be caught by some kind of

;; canonicalization in gcc, but we can easily help with it here.

;;  It results from expressions of the type

;; "power_of_2_value & (1 << y)".

;;

;; Since there may be codes with tests in on bits (in constant position)

;; beyond the size of a word, handle that by assuming those bits are 0.

;; GCC should handle that, but it's a matter of easily-added belts while

;; having suspenders.

  "@

   btstq (%1-1),%0

   cmpq 0,%0

   btstq %2,%0

   clearf nz

   btst %2,%0

   clearf nz

   cmpq %p0,%2"

 [(set_attr "slottable" "yes")

  (set_attr "cc" "noov32")])

;; Move insns.

;; The whole mandatory movdi family is here; expander, "anonymous"

;; recognizer and splitter.  We're forced to have a movdi pattern,

;; although GCC should be able to split it up itself.  Normally it can,

;; but if other insns have DI operands (as is the case here), reload

;; must be able to generate or match a movdi.  many testcases fail at

;; -O3 or -fssa if we don't have this.  FIXME: Fix GCC...  See

;; .

;; However, a patch from Richard Kenner (similar to the cause of

;; discussion at the URL above), indicates otherwise.  See

;; .

;; The truth has IMO is not been decided yet, so check from time to

;; time by disabling the movdi patterns.

;; To appease testcase gcc.c-torture/execute/920501-2.c (and others) at

;; -O0, we need a movdi as a temporary measure.  Here's how things fail:

;;  A cmpdi RTX needs reloading (global):

;;    (insn 185 326 186 (set (cc0)

;;          (compare (mem/f:DI (reg/v:SI 22) 0)

;;              (const_int 1 [0x1]))) 4 {cmpdi} (nil)

;;      (nil))

;; Now, reg 22 is reloaded for input address, and the mem is also moved

;; out of the instruction (into a register), since one of the operands

;; must be a register.  Reg 22 is reloaded (into reg 10), and the mem is

;; moved out and synthesized in SImode parts (reg 9, reg 10 - should be ok

;; wrt. overlap).  The bad things happen with the synthesis in

;; emit_move_insn_1; the location where to substitute reg 10 is lost into

;; two new RTX:es, both still having reg 22.  Later on, the left-over reg

;; 22 is recognized to have an equivalent in memory which is substituted

;; straight in, and we end up with an unrecognizable insn:

;;    (insn 325 324 326 (set (reg:SI 9 r9)

;;            (mem/f:SI (mem:SI (plus:SI (reg:SI 8 r8)

;;                        (const_int -84 [0xffffffac])) 0) 0)) -1 (nil)

;;        (nil))

;; which is the first part of the reloaded synthesized "movdi".

;;  The right thing would be to add equivalent replacement locations for

;; insn with pseudos that need more reloading.  The question is where.

(define_expand "movdi"

  [(set (match_operand:DI 0 "nonimmediate_operand" "")

        (match_operand:DI 1 "general_operand" ""))]

  ""

{

  if (MEM_P (operands[0])

      && operands[1] != const0_rtx

      && (!TARGET_V32 || (!REG_P (operands[1]) && can_create_pseudo_p ())))

    operands[1] = copy_to_mode_reg (DImode, operands[1]);

  /* Some other ports (as of 2001-09-10 for example mcore and romp) also

     prefer to split up constants early, like this.  The testcase in

     gcc.c-torture/execute/961213-1.c shows that CSE2 gets confused by the

     resulting subreg sets when using the construct from mcore (as of FSF

     CVS, version -r 1.5), and it believes that the high part (the last one

     emitted) is the final value.  */

  if ((CONST_INT_P (operands[1]) || GET_CODE (operands[1]) == CONST_DOUBLE)

      && ! reload_completed

      && ! reload_in_progress)

    {

      rtx insns;

      rtx op0 = operands[0];

      rtx op1 = operands[1];

      start_sequence ();

      emit_move_insn (operand_subword (op0, 0, 1, DImode),

                      operand_subword (op1, 0, 1, DImode));

      emit_move_insn (operand_subword (op0, 1, 1, DImode),

                      operand_subword (op1, 1, 1, DImode));

      insns = get_insns ();

      end_sequence ();

      emit_insn (insns);

      DONE;

    }

})

(define_insn_and_split "*movdi_insn_non_v32"

  [(set (match_operand:DI 0 "nonimmediate_operand" "=r,rx,m")

        (match_operand:DI 1 "general_operand"      "rx,g,rxM"))]

  "(register_operand (operands[0], DImode)

    || register_operand (operands[1], DImode)

    || operands[1] == const0_rtx)

   && !TARGET_V32"

  "#"

  "&& reload_completed"

  [(match_dup 2)]

  "operands[2] = cris_split_movdx (operands);")

;; Overlapping (but non-identical) source memory address and destination

;; register would be a compiler bug, so we don't have to specify that.

(define_insn "*movdi_v32"

  [(set

    (match_operand:DI 0 "nonimmediate_operand" "=r,rx,&r,>, m,r,x,m")

    (match_operand:DI 1 "general_operand"     "rxi,r>,m, rx,r,m,m,x"))]

  "TARGET_V32"

{

  switch (which_alternative)

    {

      /* FIXME: 1) Use autoincrement where possible.  2) Have peephole2,

         particularly for cases where the address register is dead.  */

    case 5:

      if (REGNO (operands[0]) == REGNO (XEXP (operands[1], 0)))

        return "addq 4,%L1\;move.d %1,%H0\;subq 4,%L1\;move.d %1,%M0";

      gcc_assert (REGNO (operands[0]) + 1 == REGNO (XEXP (operands[1], 0)));

      return "move.d [%L1+],%M0\;move.d [%L1],%H0";

    case 2:

      /* We could do away with the addq if we knew the address-register

         isn't ACR.  If we knew the address-register is dead, we could do

         away with the subq too.  */

      return "move.d [%L1],%M0\;addq 4,%L1\;move.d [%L1],%H0\;subq 4,%L1";

    case 4:

      return "move.d %M1,[%L0]\;addq 4,%L0\;move.d %H1,[%L0]\;subq 4,%L0";

    case 6:

      return "move [%L1],%M0\;addq 4,%L1\;move [%L1],%H0\;subq 4,%L1";

    case 7:

      return "move %M1,[%L0]\;addq 4,%L0\;move %H1,[%L0]\;subq 4,%L0";

    default:

      return "#";

    }

}

  ;; The non-split cases clobber cc0 because of their adds and subs.

  ;; Beware that NOTICE_UPDATE_CC is called before the forced split happens.

  [(set_attr "cc" "*,*,clobber,*,clobber,clobber,*,*")])

;; Much like "*movdi_insn_non_v32".  Overlapping registers and constants

;; is handled so much better in cris_split_movdx.

(define_split

  [(set (match_operand:DI 0 "nonimmediate_operand" "")

        (match_operand:DI 1 "general_operand" ""))]

  "TARGET_V32

   && reload_completed

   && (!MEM_P (operands[0]) || !REG_P (XEXP (operands[0], 0)))

   && (!MEM_P (operands[1]) || !REG_P (XEXP (operands[1], 0)))"

  [(match_dup 2)]

  "operands[2] = cris_split_movdx (operands);")

;; Side-effect patterns for move.S1 [rx=ry+rx.S2],rw

;; and move.S1 [rx=ry+i],rz

;;  Then movs.S1 and movu.S1 for both modes.

;;

;; move.S1 [rx=ry+rz.S],rw avoiding when rx is ry, or rw is rx

;; FIXME: These could have anonymous mode for operand 0.

;; FIXME: Special registers' alternatives too.

(define_insn "*mov_side_biap"

  [(set (match_operand:BW 0 "register_operand" "=r,r")

        (mem:BW (plus:SI

                 (mult:SI (match_operand:SI 1 "register_operand" "r,r")

                          (match_operand:SI 2 "const_int_operand" "n,n"))

                 (match_operand:SI 3 "register_operand" "r,r"))))

   (set (match_operand:SI 4 "register_operand" "=*3,r")

        (plus:SI (mult:SI (match_dup 1)

                          (match_dup 2))

                 (match_dup 3)))]

  "cris_side_effect_mode_ok (MULT, operands, 4, 3, 1, 2, 0)"

  "@

   #

   move [%4=%3+%1%T2],%0")

(define_insn "*mov_sidesisf_biap"

  [(set (match_operand 0 "register_operand" "=r,r,x,x")

        (mem (plus:SI

              (mult:SI (match_operand:SI 1 "register_operand" "r,r,r,r")

                       (match_operand:SI 2 "const_int_operand" "n,n,n,n"))

              (match_operand:SI 3 "register_operand" "r,r,r,r"))))

   (set (match_operand:SI 4 "register_operand" "=*3,r,*3,r")

        (plus:SI (mult:SI (match_dup 1)

                          (match_dup 2))

                 (match_dup 3)))]

  "GET_MODE_SIZE (GET_MODE (operands[0])) == UNITS_PER_WORD

   && cris_side_effect_mode_ok (MULT, operands, 4, 3, 1, 2, 0)"

  "@

   #

   move.%s0 [%4=%3+%1%T2],%0

   #

   move [%4=%3+%1%T2],%0")

;; move.S1 [rx=ry+i],rz

;; avoiding move.S1 [ry=ry+i],rz

;; and      move.S1 [rz=ry+i],rz

;; Note that "i" is allowed to be a register.

(define_insn "*mov_side"

  [(set (match_operand:BW 0 "register_operand" "=r,r,r,r,r")

        (mem:BW

         (plus:SI (match_operand:SI 1 "cris_bdap_operand" "%r,r,r,R,R")

                  (match_operand:SI 2 "cris_bdap_operand" "r>Rn,r,>Rn,r,r"))))

   (set (match_operand:SI 3 "register_operand" "=*1,r,r,*2,r")

        (plus:SI (match_dup 1)

                 (match_dup 2)))]

  "cris_side_effect_mode_ok (PLUS, operands, 3, 1, 2, -1, 0)"

{

  if ((which_alternative == 0 || which_alternative == 3)

      && (!CONST_INT_P (operands[2])

          || INTVAL (operands[2]) > 127

          || INTVAL (operands[2]) < -128

          || CRIS_CONST_OK_FOR_LETTER_P (INTVAL (operands[2]), 'N')

          || CRIS_CONST_OK_FOR_LETTER_P (INTVAL (operands[2]), 'J')))

    return "#";

  if (which_alternative == 4)

    return "move [%3=%2%S1],%0";

  return "move [%3=%1%S2],%0";

})

(define_insn "*mov_sidesisf"

  [(set (match_operand 0 "register_operand" "=r,r,r,x,x,x,r,r,x,x")

        (mem

         (plus:SI

          (match_operand:SI 1 "cris_bdap_operand" "%r,r,r,r,r,r,R,R,R,R")

          (match_operand:SI 2 "cris_bdap_operand" "r>Rn,r,>Rn,r>Rn,r,>Rn,r,r,r,r"))))

   (set (match_operand:SI 3 "register_operand" "=*1,r,r,*1,r,r,*2,r,*2,r")

        (plus:SI (match_dup 1)

                 (match_dup 2)))]

  "GET_MODE_SIZE (GET_MODE (operands[0])) == UNITS_PER_WORD

   && cris_side_effect_mode_ok (PLUS, operands, 3, 1, 2, -1, 0)"

{

  if ((which_alternative == 0

       || which_alternative == 3

       || which_alternative == 6

       || which_alternative == 8)

      && (!CONST_INT_P (operands[2])

          || INTVAL (operands[2]) > 127

          || INTVAL (operands[2]) < -128

          || CRIS_CONST_OK_FOR_LETTER_P (INTVAL (operands[2]), 'N')

          || CRIS_CONST_OK_FOR_LETTER_P (INTVAL (operands[2]), 'J')))

    return "#";

  if (which_alternative < 3)

    return "move.%s0 [%3=%1%S2],%0";

  if (which_alternative == 7)

    return "move.%s0 [%3=%2%S1],%0";

  if (which_alternative == 9)

    return "move [%3=%2%S1],%0";

  return "move [%3=%1%S2],%0";

})

;; Other way around; move to memory.

;; Note that the condition (which for side-effect patterns is usually a

;; call to cris_side_effect_mode_ok), isn't consulted for register

;; allocation preferences -- constraints is the method for that.  The

;; drawback is that we can't exclude register allocation to cause

;; "move.s rw,[rx=ry+rz.S]" when rw==rx without also excluding rx==ry or

;; rx==rz if we use an earlyclobber modifier for the constraint for rx.

;; Instead of that, we recognize and split the cases where dangerous

;; register combinations are spotted: where a register is set in the

;; side-effect, and used in the main insn.  We don't handle the case where

;; the set in the main insn overlaps the set in the side-effect; that case

;; must be handled in gcc.  We handle just the case where the set in the

;; side-effect overlaps the input operand of the main insn (i.e. just

;; moves to memory).

;;

;; move.s rz,[ry=rx+rw.S]

(define_insn "*mov_side_biap_mem"

  [(set (mem:BW (plus:SI

                 (mult:SI (match_operand:SI 0 "register_operand" "r,r,r")

                          (match_operand:SI 1 "const_int_operand" "n,n,n"))

                 (match_operand:SI 2 "register_operand" "r,r,r")))

        (match_operand:BW 3 "register_operand" "r,r,r"))

   (set (match_operand:SI 4 "register_operand" "=*2,!3,r")

        (plus:SI (mult:SI (match_dup 0)

                          (match_dup 1))

                 (match_dup 2)))]

  "cris_side_effect_mode_ok (MULT, operands, 4, 2, 0, 1, 3)"

  "@

   #

   #

   move %3,[%4=%2+%0%T1]")

(define_insn "*mov_sidesisf_biap_mem"

  [(set (mem (plus:SI

              (mult:SI (match_operand:SI 0 "register_operand" "r,r,r,r,r,r")

                       (match_operand:SI 1 "const_int_operand" "n,n,n,n,n,n"))

              (match_operand:SI 2 "register_operand" "r,r,r,r,r,r")))

        (match_operand 3 "register_operand" "r,r,r,x,x,x"))

   (set (match_operand:SI 4 "register_operand" "=*2,!3,r,*2,!3,r")

        (plus:SI (mult:SI (match_dup 0)

                          (match_dup 1))

                 (match_dup 2)))]

  "GET_MODE_SIZE (GET_MODE (operands[3])) == UNITS_PER_WORD

   && cris_side_effect_mode_ok (MULT, operands, 4, 2, 0, 1, 3)"

  "@

   #

   #

   move.%s3 %3,[%4=%2+%0%T1]

   #

   #

   move %3,[%4=%2+%0%T1]")

;; Split for the case above where we're out of luck with register

;; allocation (again, the condition isn't checked for that), and we end up

;; with the set in the side-effect getting the same register as the input

;; register.

(define_split

  [(parallel

    [(set (match_operator

           6 "cris_mem_op"

           [(plus:SI

             (mult:SI (match_operand:SI 0 "register_operand" "")

                      (match_operand:SI 1 "const_int_operand" ""))

             (match_operand:SI 2 "register_operand" ""))])

          (match_operand 3 "register_operand" ""))

     (set (match_operand:SI 4 "register_operand" "")

          (plus:SI (mult:SI (match_dup 0)

                            (match_dup 1))

                   (match_dup 2)))])]

  "reload_completed && reg_overlap_mentioned_p (operands[4], operands[3])"

  [(set (match_dup 5) (match_dup 3))

   (set (match_dup 4) (match_dup 2))

   (set (match_dup 4)

        (plus:SI (mult:SI (match_dup 0)

                          (match_dup 1))

                 (match_dup 4)))]

  "operands[5]

     = replace_equiv_address (operands[6],

                              gen_rtx_PLUS (SImode,

                                            gen_rtx_MULT (SImode,

                                                          operands[0],

                                                          operands[1]),

                                            operands[2]));")

;; move.s rx,[ry=rz+i]

;; FIXME: These could have anonymous mode for operand 2.

;; QImode

(define_insn "*mov_side_mem"

  [(set (mem:BW

         (plus:SI (match_operand:SI 0 "cris_bdap_operand" "%r,r,r,r,R,R,R")

                  (match_operand:SI 1 "cris_bdap_operand" "r>Rn,r>Rn,r,>Rn,r,r,r")))

        (match_operand:BW 2 "register_operand" "r,r,r,r,r,r,r"))

   (set (match_operand:SI 3 "register_operand" "=*0,!*2,r,r,*1,!*2,r")

        (plus:SI (match_dup 0)

                 (match_dup 1)))]

  "cris_side_effect_mode_ok (PLUS, operands, 3, 0, 1, -1, 2)"

{

  if ((which_alternative == 0 || which_alternative == 4)

      && (!CONST_INT_P (operands[1])

          || INTVAL (operands[1]) > 127

          || INTVAL (operands[1]) < -128

          || CRIS_CONST_OK_FOR_LETTER_P (INTVAL (operands[1]), 'N')

          || CRIS_CONST_OK_FOR_LETTER_P (INTVAL (operands[1]), 'J')))

    return "#";

  if (which_alternative == 1 || which_alternative == 5)

    return "#";

  if (which_alternative == 6)

    return "move.%s2 %2,[%3=%1%S0]";

  return "move %2,[%3=%0%S1]";

})

;; SImode

(define_insn "*mov_sidesisf_mem"

  [(set (mem

         (plus:SI

          (match_operand:SI

                                "%r,  r,   r,r,  r,   r,r,  R,R,  R,R, R")

          (match_operand:SI

           1 "cris_bdap_operand"

                                "r>Rn,r>Rn,r,>Rn,r>Rn,r,>Rn,r,r,  r,r, r")))

        (match_operand 2 "register_operand"

                                "r,   r,   r,r,  x,   x,x,  r,r,  r,x, x"))

   (set (match_operand:SI 3 "register_operand"

                                "=*0,!2,   r,r,  *0,  r,r, *1,!*2,r,*1,r")

        (plus:SI (match_dup 0)

                 (match_dup 1)))]

  "GET_MODE_SIZE (GET_MODE (operands[2])) == UNITS_PER_WORD

   && cris_side_effect_mode_ok (PLUS, operands, 3, 0, 1, -1, 2)"

{

  if ((which_alternative == 0 || which_alternative == 4)

      && (!CONST_INT_P (operands[1])

          || INTVAL (operands[1]) > 127

          || INTVAL (operands[1]) < -128

          || CRIS_CONST_OK_FOR_LETTER_P (INTVAL (operands[1]), 'N')

          || CRIS_CONST_OK_FOR_LETTER_P (INTVAL (operands[1]), 'J')))

    return "#";

  if (which_alternative == 1

      || which_alternative == 7

      || which_alternative == 8

      || which_alternative == 10)

    return "#";

  if (which_alternative < 4)

    return "move.%s2 %2,[%3=%0%S1]";

  if (which_alternative == 9)

    return "move.%s2 %2,[%3=%1%S0]";

  if (which_alternative == 11)

    return "move %2,[%3=%1%S0]";

  return "move %2,[%3=%0%S1]";

})

;; Like the biap case, a split where the set in the side-effect gets the

;; same register as the input register to the main insn, since the

;; condition isn't checked at register allocation.

(define_split

  [(parallel

    [(set (match_operator

           4 "cris_mem_op"

           [(plus:SI

             (match_operand:SI 0 "cris_bdap_operand" "")

             (match_operand:SI 1 "cris_bdap_operand" ""))])

          (match_operand 2 "register_operand" ""))

     (set (match_operand:SI 3 "register_operand" "")

          (plus:SI (match_dup 0) (match_dup 1)))])]

  "reload_completed && reg_overlap_mentioned_p (operands[3], operands[2])"

  [(set (match_dup 4) (match_dup 2))

   (set (match_dup 3) (match_dup 0))

   (set (match_dup 3) (plus:SI (match_dup 3) (match_dup 1)))]

  "")

;; Clear memory side-effect patterns.  It is hard to get to the mode if

;; the MEM was anonymous, so there will be one for each mode.

;;  clear.[bwd] [ry=rx+rw.s2]

(define_insn "*clear_side_biap"

  [(set (mem:BWD (plus:SI

                  (mult:SI (match_operand:SI 0 "register_operand" "r,r")

                           (match_operand:SI 1 "const_int_operand" "n,n"))

                  (match_operand:SI 2 "register_operand" "r,r")))

        (const_int 0))

   (set (match_operand:SI 3 "register_operand" "=*2,r")

        (plus:SI (mult:SI (match_dup 0)

                          (match_dup 1))

                 (match_dup 2)))]

  "cris_side_effect_mode_ok (MULT, operands, 3, 2, 0, 1, -1)"

  "@

   #

   clear [%3=%2+%0%T1]")

;; clear.[bwd] [ry=rz+i]

(define_insn "*clear_side"

  [(set (mem:BWD

         (plus:SI (match_operand:SI 0 "cris_bdap_operand" "%r,r,r,R,R")

                  (match_operand:SI 1 "cris_bdap_operand" "r>Rn,r,>Rn,r,r")))

        (const_int 0))

   (set (match_operand:SI 2 "register_operand" "=*0,r,r,*1,r")

        (plus:SI (match_dup 0)

                 (match_dup 1)))]

  "cris_side_effect_mode_ok (PLUS, operands, 2, 0, 1, -1, -1)"

{

  if ((which_alternative == 0 || which_alternative == 3)

      && (!CONST_INT_P (operands[1])

          || INTVAL (operands[1]) > 127

          || INTVAL (operands[1]) < -128

          || CRIS_CONST_OK_FOR_LETTER_P (INTVAL (operands[1]), 'N')

          || CRIS_CONST_OK_FOR_LETTER_P (INTVAL (operands[1]), 'J')))

    return "#";

  if (which_alternative == 4)

    return "clear [%2=%1%S0]";

  return "clear [%2=%0%S1]";

})

;; Normal move patterns from SI on.

(define_expand "movsi"

  [(set

    (match_operand:SI 0 "nonimmediate_operand" "")

    (match_operand:SI 1 "cris_general_operand_or_symbol" ""))]

  ""

{

  /* If the output goes to a MEM, make sure we have zero or a register as

     input.  */

  if (MEM_P (operands[0])

      && ! REG_S_P (operands[1])

      && operands[1] != const0_rtx

      && can_create_pseudo_p ())

    operands[1] = force_reg (SImode, operands[1]);

  /* If we're generating PIC and have an incoming symbol, validize it to a

     general operand or something that will match a special pattern.