;; GCC machine description for CRIS cpu cores. ;; Copyright (C) 1998-2021 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 ;; http://www.gnu.org/licenses/.
;; 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.
;; 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.
(define_c_enum "" [ ;; Stack frame deallocation barrier. CRIS_UNSPEC_FRAME_DEALLOC
;; Swap all 32 bits of the operand; 31 <=> 0, 30 <=> 1... CRIS_UNSPEC_SWAP_BITS ])
;; Register numbers. (define_constants [(CRIS_STATIC_CHAIN_REGNUM 7) (CRIS_REAL_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) (CRIS_FP_REGNUM 20)] )
;; 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”, and “has_return_slot”. ;; Yes/no tells whether the insn is slottable or not. ;; 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” (const_string “no”))
;; We also need attributes to sanely determine the condition code ;; state. This attribute isn't used as-is, just as a template, ;; effectively a dummy except in a substitution setting CRIS_CC0_REGNUM ;; to a specific value. (define_attr “cc” “none,clobber,normal” (const_string “normal”))
;; The attribute “_enabled” is appended to “cc”, forming “cc_enabled” to ;; pick out certain alternatives when generating a useful ;; condition-code-setting. See the “enabled” attribute. (define_attr “cc_enabled” “none,clobber,normal” (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)])
;; 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”) (not (match_test “dead_or_set_regno_p (insn, CRIS_SRP_REGNUM)”))) (nil) (nil)])
(define_attr “enabled” “no,yes” (if_then_else (eq_attr “cc_enabled” “normal”) (const_string “yes”) (const_string “no”))) ;; Iterator definitions.
;; For the “usual” pattern size alternatives. (define_mode_iterator BWD [SI HI QI]) (define_mode_iterator BWDD [DI SI HI QI])
;; To be able to refer to the same mode_attr for both a multi-mode ;; and a mode-specific pattern, we use some singleton iterators. (define_mode_iterator DI_ [DI]) (define_mode_iterator SI_ [SI])
(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 extended-operand variants. (define_code_iterator plusminus [plus minus]) (define_code_attr addsub [(plus “add”) (minus “sub”)])
;; Similar, other cases also matching bound/umin. (define_code_iterator plusminusumin [plus minus umin])
;; Ditto, commutative operators (i.e. not minus). (define_code_iterator plusumin [plus umin])
;; The addsubbo and nd code-attributes form a hack. We need to output ;; “addu.b”, “subu.b” but “bound.b” (no “u”-suffix) which means we‘d ;; need to refer to one iterator from the next. But, that can’t be ;; done. Instead output the “u” for unsigned as the “u” in “bound”, ;; i.e. the mnemonic as three parts including the extend-letter, and ;; with an empty third part for “add” and “sub”. (define_code_attr addsubbo [(plus “add”) (minus “sub”) (umin “bo”)]) (define_code_attr nd [(plus "") (minus "") (umin “nd”)])
;; 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”)])
;; Compares, branches, cbranch, cstore. Conditions gt and le are CC_NZVC. ;; Others start out as CCmode and can degenerate to CC_NZmode. ;; Incidental setters are either CC_NZVCmode or CC_NZmode. See also ;; cris-modes.def. (define_mode_iterator NZSET [CC_NZ]) (define_mode_iterator NZUSE [CC CC_NZ CC_NZVC]) (define_mode_iterator NZVCSET [CC CC_NZVC CC_NZ]) (define_mode_iterator NZVCUSE [CC_NZVC]) (define_mode_iterator ZnNNZSET [CC_ZnN CC_NZ]) (define_mode_iterator ZnNNZUSE [CC CC_ZnN CC_NZ CC_NZVC])
;; All conditions. (define_code_iterator cond [eq ne gtu ltu geu leu gt le lt ge])
;; Just equal and not equal. (define_code_iterator zcond [eq ne])
;; Conditions that look only at Z and/or N (or can do with that). (define_code_iterator nzcond [eq ne gtu leu lt ge])
;; The complement of nzcond within cond; conditions that look (also) on V ;; or C. (define_code_iterator nzvccond [geu ltu gt le])
;; Within nzcond, those that give different opcodes when operands are ;; reversed or that can ignore V or C. Also, the complement of zcond ;; within nzcond. (define_code_iterator rnzcond [gtu leu lt ge])
;; CRIS condition mnemonic. (define_code_attr CC [(eq “eq”) (ne “ne”) (gt “gt”) (gtu “hi”) (lt “lt”) (ltu “lo”) (ge “ge”) (geu “hs”) (le “le”) (leu “ls”)])
;; CRIS reverse condition mnemonic. (define_code_attr rCC [(eq “ne”) (ne “eq”) (gt “le”) (gtu “ls”) (lt “ge”) (ltu “hs”) (ge “lt”) (geu “lo”) (le “gt”) (leu “hi”)])
;; Mnemomic for the CRIS condition when V or C can be ignored. (define_code_attr oCC [(lt “mi”) (ge “pl”) (gtu “eq”) (ltu “ne”)])
;; Reverse of oCC. (define_code_attr roCC [(lt “pl”) (ge “mi”) (gtu “eq”) (ltu “ne”)])
;; CC_Z_IN_NOT_N, a.k.a. CC_ZnNmode. (define_code_attr znnCC [(eq “pl”) (ne “mi”)])
;;; ...and the reverse (define_code_attr rznnCC [(eq “mi”) (ne “pl”)])
;; Required unoptimized CCmode, different for nzcond and nzvccond. (define_code_attr xCC [(eq “CC”) (ne “CC”) (gtu “CC”) (ltu “CC_NZVC”) (geu “CC_NZVC”) (leu “CC”) (lt “CC”) (ge “CC”) (gt “CC_NZVC”) (le “CC_NZVC”)])
;; Substitutions to describe condition-code settings.
(define_subst_attr “setnz” “setnz_subst” "" “_setnz”) (define_subst_attr “ccnz” “setnz_subst” "" “_enabled”) (define_subst_attr “anz” “setnz_subst” "" “*”)
(define_subst “setnz_subst” [(set (match_operand 0) (match_operand 1)) (clobber (reg:CC CRIS_CC0_REGNUM))] “reload_completed” [(set (reg:CC_NZ CRIS_CC0_REGNUM) (compare:CC_NZ (match_dup 1) (const_int 0))) (set (match_dup 0) (match_dup 1))])
(define_subst_attr “setnzvc” “setnzvc_subst” "" “_setnzvc”) (define_subst_attr “ccnzvc” “setnzvc_subst” "" “_enabled”) (define_subst_attr “anzvc” “setnzvc_subst” "" “*”)
(define_subst “setnzvc_subst” [(set (match_operand 0) (match_operand 1)) (clobber (reg:CC CRIS_CC0_REGNUM))] “reload_completed” [(set (reg:CC_NZVC CRIS_CC0_REGNUM) (compare:CC_NZVC (match_dup 1) (const_int 0))) (set (match_dup 0) (match_dup 1))])
(define_subst_attr “setcc” “setcc_subst” "" “_setcc”) (define_subst_attr “cccc” “setcc_subst” "" “_enabled”) (define_subst_attr “acc” “setcc_subst” "" “*”)
(define_subst “setcc_subst” [(set (match_operand 0) (match_operand 1)) (clobber (reg:CC CRIS_CC0_REGNUM))] “reload_completed” [(set (reg:CC CRIS_CC0_REGNUM) (compare:CC (match_dup 1) (const_int 0))) (set (match_dup 0) (match_dup 1))])
;; Operand and operator predicates.
(include “predicates.md”) (include “constraints.md”) ;; 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. ;; Compare insns.
;; These are used for compare insn, cbranch and cstore. ;; FIXME: Port-local reversing of operands is not done. Still needed? ;; (It shouldn't be; it should be done as part of register allocation.) (define_mode_attr sCC_destc [(DI “r, r,r,r,r,r,r”) (SI “r,r, r, r,r,r”) (HI “r, r, r,r”) (QI “r, r, r,r”)]) (define_mode_attr cmp_op0c [(DI “rm,r,r,r,r,r,r”) (SI “r,r, rQ>,r,r,m”) (HI “r, rQ>,r,m”) (QI “r, rQ>,r,m”)]) (define_mode_attr cmp_op1c [(DI “M,Kc,I,P,n,r,o”) (SI “I,rQ>,M, P,g,M”) (HI “rQ>,M, g,M”) (QI “rQ>,M, g,M”)])
;; 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 “*cmpdiNZVCSET:mode” [(set (reg:NZVCSET CRIS_CC0_REGNUM) (compare:NZVCSET (match_operand:DI_ 0 “nonimmediate_operand” “<cmp_op0c>”) (match_operand:DI_ 1 “general_operand” “<cmp_op1c>”)))] “reload_completed” “@ 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”)
;; 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_extBW:modeNZVCSET:mode” [(set (reg:NZVCSET CRIS_CC0_REGNUM) (compare:NZVCSET (match_operand:SI 0 “register_operand” “r,r”) (match_operator:SI 2 “cris_extend_operator” [(match_operand:BW 1 “memory_operand” “Q>,m”)])))] “reload_completed” “cmp%e2 %1,%0” [(set_attr “slottable” “yes,no”)]) ;; The “normal” compare patterns, from SI on. Special-cases with zero ;; are covered above.
(define_insn “*cmpsiNZVCSET:mode” [(set (reg:NZVCSET CRIS_CC0_REGNUM) (compare:NZVCSET (match_operand:SI_ 0 “nonimmediate_operand” “<cmp_op0c>”) (match_operand:SI_ 1 “general_operand” “<cmp_op1c>”)))] “reload_completed” “@ cmpq %1,%0 cmp.d %1,%0 test.d %0 cmp%e1.%z1 %1,%0 cmp.d %1,%0 test.d %0” [(set_attr “slottable” “yes,yes,yes,no,no,no”)])
(define_insn “*cmpBW:modeNZVCSET:mode” [(set (reg:NZVCSET CRIS_CC0_REGNUM) (compare:NZVCSET (match_operand:BW 0 “nonimmediate_operand” “<cmp_op0c>”) (match_operand:BW 1 “general_operand” “<cmp_op1c>”)))] “reload_completed” “@ cmp %1,%0 test %0 cmp %1,%0 test %0” [(set_attr “slottable” “yes,yes,no,no”)]) ;; 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. (define_insn “*btst” [(set (reg:ZnNNZSET CRIS_CC0_REGNUM) (compare:ZnNNZSET (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. “reload_completed && CONST_INT_P (operands[1]) && ((operands[1] == const1_rtx && mode == CC_ZnNmode) || (operands[2] == const0_rtx && mode == CC_NZmode)) && (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)”. FIXME: Add testcase. ;; ;; 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”)]) ;; 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 ;; URL:http://gcc.gnu.org/ml/gcc-patches/2000-04/msg00104.html. ;; However, a patch from Richard Kenner (similar to the cause of ;; discussion at the URL above), indicates otherwise. See ;; URL:http://gcc.gnu.org/ml/gcc-patches/2000-04/msg00554.html. ;; 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” [(parallel [(set (match_operand:DI 0 “nonimmediate_operand”) (match_operand:DI 1 “general_operand”)) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" { if (MEM_P (operands[0]) && operands[1] != const0_rtx && 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” [(set (match_operand:DI 0 “nonimmediate_operand” “=r,rx,m”) (match_operand:DI 1 “general_operand” “rx,g,rxM”)) (clobber (reg:CC CRIS_CC0_REGNUM))] “(register_operand (operands[0], DImode) || register_operand (operands[1], DImode) || operands[1] == const0_rtx)” “#” “&& reload_completed” [(match_dup 2)] “operands[2] = cris_split_movdx (operands);”) ;; Normal move patterns from SI on.
(define_expand “movsi” [(parallel [(set (match_operand:SI 0 “nonimmediate_operand”) (match_operand:SI 1 “general_operand”)) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" { /* 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]);
/* At post-reload time, we'll get here for e.g. split multi-mode insns with a memory destination. Go directly to the clobber-less variant. FIXME: Also applies to special-register source or destination. */ if (reload_completed && (MEM_P (operands[0]) || operands[1] == const0_rtx)) { emit_insn (gen_rtx_SET (operands[0], operands[1])); DONE; } })
;; We provide CC, CC_NZ and CC_NZVC variants, as moves clear V and C ;; and the result is thus usable in a compare against 0. (define_insn “*movsi_internal” [(set (match_operand:SI 0 “nonimmediate_operand” “=r,r, r,Q>,r,Q>,g,r,r,g,rQ>,x, m,x”) (match_operand:SI 1 “general_operand” “r,Q>,M,M, I,r, M,n,g,r,x, rQ>,x,gi”)) (clobber (reg:CC CRIS_CC0_REGNUM))] ;; Note that we prefer not to use the S alternative (if for some reason ;; it competes with others) above, but g matches S. "" { /* Better to have c-switch here; it is worth it to optimize the size of move insns. The alternative would be to try to find more constraint letters. FIXME: Check again. It seems this could shrink a bit. */ switch (which_alternative) { case 0: case 1: case 5: case 8: case 9: return “move.d %1,%0”;
case 10:
case 11:
case 12:
case 13:
return "move %1,%0";
case 2:
case 3:
case 6:
return "clear.d %0";
/* Constants -32..31 except 0. */
case 4:
return "moveq %1,%0";
/* We can win a little on constants -32768..-33, 32..65535. */
case 7:
if (INTVAL (operands[1]) > 0 && INTVAL (operands[1]) < 65536)
{
if (INTVAL (operands[1]) < 256)
return "movu.b %1,%0";
return "movu.w %1,%0";
}
else if (INTVAL (operands[1]) >= -32768 && INTVAL (operands[1]) < 32768)
{
if (INTVAL (operands[1]) >= -128 && INTVAL (operands[1]) < 128)
return "movs.b %1,%0";
return "movs.w %1,%0";
}
return "move.d %1,%0";
default:
gcc_unreachable ();
}
} [(set_attr “slottable” “yes,yes,yes,yes,yes,yes,no,no,no,no,yes,yes,no,no”) (set_attr “cc” “,,none,none,,none,none,,*,none,none,none,none,none”)]) ;; FIXME: See movsi.
(define_insn “movhi” [(set (match_operand:HI 0 “nonimmediate_operand” “=r,r, r,Q>,r,Q>,r,r,r,g,g,r,r,x”) (match_operand:HI 1 “general_operand” “r,Q>,M,M, I,r, L,O,n,M,r,g,x,r”)) (clobber (reg:CC CRIS_CC0_REGNUM))] "" { switch (which_alternative) { case 0: case 1: case 5: case 10: case 11: return “move.w %1,%0”; case 12: case 13: return “move %1,%0”; case 2: case 3: case 9: return “clear.w %0”; case 4: return “moveq %1,%0”; case 6: case 8: if (INTVAL (operands[1]) < 256 && INTVAL (operands[1]) >= -128) { if (INTVAL (operands[1]) > 0) return “movu.b %1,%0”; return “movs.b %1,%0”; } return “move.w %1,%0”; case 7: return “movEq %b1,%0”; default: return “BOGUS: %1 to %0”; } } [(set_attr “slottable” “yes,yes,yes,yes,yes,yes,no,yes,no,no,no,no,yes,yes”) (set_attr “cc” “,,none,none,,none,,clobber,,none,none,,none,none”)])
(define_insn “movstricthi” [(set (strict_low_part (match_operand:HI 0 “nonimmediate_operand” “+r,r, r,Q>,Q>,g,r,g”)) (match_operand:HI 1 “general_operand” “r,Q>,M,M, r, M,g,r”)) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ move.w %1,%0 move.w %1,%0 clear.w %0 clear.w %0 move.w %1,%0 clear.w %0 move.w %1,%0 move.w %1,%0” [(set_attr “slottable” “yes,yes,yes,yes,yes,no,no,no”)])
(define_expand “reload_in” [(set (match_operand:BW 2 “register_operand” “=r”) (match_operand:BW 1 “memory_operand” “m”)) (set (match_operand:BW 0 “register_operand” “=x”) (match_dup 2))] "" "")
(define_expand “reload_out” [(set (match_operand:BW 2 “register_operand” “=&r”) (match_operand:BW 1 “register_operand” “x”)) (set (match_operand:BW 0 “memory_operand” “=m”) (match_dup 2))] "" "") (define_insn “movqi” [(set (match_operand:QI 0 “nonimmediate_operand” “=r,Q>,r, r,Q>,r,g,g,r,r,r,x”) (match_operand:QI 1 “general_operand” “r,r, Q>,M,M, I,M,r,O,g,x,r”)) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ move.b %1,%0 move.b %1,%0 move.b %1,%0 clear.b %0 clear.b %0 moveq %1,%0 clear.b %0 move.b %1,%0 moveq %b1,%0 move.b %1,%0 move %1,%0 move %1,%0” [(set_attr “slottable” “yes,yes,yes,yes,yes,yes,no,no,yes,no,yes,yes”) (set_attr “cc” “,none,,none,none,,none,none,clobber,,none,none”)])
(define_insn “movstrictqi” [(set (strict_low_part (match_operand:QI 0 “nonimmediate_operand” “+r,Q>,r, r,Q>,g,g,r”)) (match_operand:QI 1 “general_operand” “r,r, Q>,M,M, M,r,g”)) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ move.b %1,%0 move.b %1,%0 move.b %1,%0 clear.b %0 clear.b %0 clear.b %0 move.b %1,%0 move.b %1,%0” [(set_attr “slottable” “yes,yes,yes,yes,yes,no,no,no”)])
;; The valid “quick” bit-patterns are, except for 0.0, denormalized ;; values REALLY close to 0, and some NaN:s (I think; their exponent is ;; all ones); the worthwhile one is “0.0”. ;; It will use clear, so we know ALL types of immediate 0 never change cc.
(define_insn “movsf” [(set (match_operand:SF 0 “nonimmediate_operand” “=r,Q>,r, r,Q>,g,g,r,r,x,Q>,m,x, x”) (match_operand:SF 1 “general_operand” “r,r, Q>,G,G, G,r,g,x,r,x, x,Q>,g”)) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ move.d %1,%0 move.d %1,%0 move.d %1,%0 clear.d %0 clear.d %0 clear.d %0 move.d %1,%0 move.d %1,%0 move %1,%0 move %1,%0 move %1,%0 move %1,%0 move %1,%0 move %1,%0” [(set_attr “slottable” “yes,yes,yes,yes,yes,no,no,no,yes,yes,yes,no,yes,no”)])
;; Post-reload, for memory destinations, split the clobber-variant and ;; get rid of the clobber.
(define_split ;; “*mov_tomem_split” [(set (match_operand:BWD 0 “memory_operand”) (match_operand:BWD 1 “nonmemory_operand”)) (clobber (reg:CC CRIS_CC0_REGNUM))] “reload_completed” [(set (match_dup 0) (match_dup 1))] "")
;; Exclude moving special-registers to memory from matching for ;; less-than-SImode, as they are SImode only (or actually, the size of ;; the register, but the ones free for “x” are naturally SImode; see ;; special measures taken for reload). ;; This might be a belt-and-suspenders thing, as a move from special ;; register to memory in less-than-SImode should not have made it here.
(define_mode_attr mov_tomem_enabled [(SI “yes,yes,yes,yes,yes,yes”) (HI “yes,yes,no,yes,yes,no”) (QI “yes,yes,no,yes,yes,no”)])
(define_insn “*mov_tomem” [(set (match_operand:BWD 0 “memory_operand” “=Q>,Q>,Q>,m,m,m”) (match_operand:BWD 1 “nonmemory_operand” “M, r, x, M,r,x”))] “reload_completed” “@ clear %0 move %1,%0 move %1,%0 clear %0 move %1,%0 move %1,%0” [(set_attr “slottable” “yes,yes,yes,no,no,no”) (set_attr “enabled” “<mov_tomem_enabled>”)])
(define_split ;; “*mov_fromzero_split” [(set (match_operand:BWD 0 “register_operand”) (const_int 0)) (clobber (reg:CC CRIS_CC0_REGNUM))] “reload_completed && REGNO(operands[0]) <= CRIS_LAST_GENERAL_REGISTER” [(set (match_dup 0) (const_int 0))] "")
(define_insn “*mov_fromzero” [(set (match_operand:BWD 0 “register_operand” “=r”) (const_int 0))] “reload_completed” “clear %0” [(set_attr “slottable” “yes”)]) ;; Movem patterns. Primarily for use in function prologue and epilogue. ;; Unfortunately, movem stores R0 in the highest memory location, thus ;; the opposite of the expectation for the standard names “load_multiple” ;; and “store_multiple”.
(define_insn “*cris_load_multiple” [(match_parallel 0 “cris_load_multiple_op” [(set (match_operand:SI 1 “register_operand” “=r,r”) (match_operand:SI 2 “memory_operand” “Q,m”))])] "" “movem %O0,%o0” [(set_attr “cc” “none”) (set_attr “slottable” “yes,no”) ;; Not true, but setting the length to 0 causes return sequences (ret ;; movem) to have the cost they had when (return) included the movem ;; and reduces the performance penalty taken for needing to emit an ;; epilogue (in turn copied by bb-reorder) instead of return patterns. ;; FIXME: temporary change until all insn lengths are correctly ;; described. FIXME: have better target control over bb-reorder. (set_attr “length” “0”)])
(define_insn “*cris_store_multiple” [(match_parallel 0 “cris_store_multiple_op” [(set (match_operand:SI 2 “memory_operand” “=Q,m”) (match_operand:SI 1 “register_operand” “r,r”))])] "" “movem %o0,%O0” [(set_attr “cc” “none”) (set_attr “slottable” “yes,no”)])
;; Sign- and zero-extend insns with standard names. ;; Those for integer source operand are ordered with the widest source ;; type first.
;; Sign-extend.
(define_insn “extendsidi2” [(set (match_operand:DI 0 “register_operand” “=r”) (sign_extend:DI (match_operand:SI 1 “general_operand” “g”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “move.d %1,%M0;smi %H0;neg.d %H0,%H0”)
(define_insn “extenddi2” [(set (match_operand:DI 0 “register_operand” “=r”) (sign_extend:DI (match_operand:BW 1 “general_operand” “g”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “movs %1,%M0;smi %H0;neg.d %H0,%H0”)
(define_insn “extendsi2” [(set (match_operand:SI 0 “register_operand” “=r,r,r”) (sign_extend:SI (match_operand:BW 1 “general_operand” “r,Q>,g”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “movs %1,%0” [(set_attr “slottable” “yes,yes,no”)])
;; To do a byte->word extension, extend to dword, except that the top half ;; of the register will be clobbered. FIXME: Perhaps this is not needed.
(define_insn “extendqihi2” [(set (match_operand:HI 0 “register_operand” “=r,r,r”) (sign_extend:HI (match_operand:QI 1 “general_operand” “r,Q>,g”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “movs.b %1,%0” [(set_attr “slottable” “yes,yes,no”)])
;; Zero-extend. The DImode ones are synthesized by gcc, so we don't ;; specify them here.
(define_insn “zero_extendsi2” [(set (match_operand:SI 0 “register_operand” “=r,r,r”) (zero_extend:SI (match_operand:BW 1 “nonimmediate_operand” “r,Q>,m”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “movu %1,%0” [(set_attr “slottable” “yes,yes,no”)])
;; Same comment as sign-extend QImode to HImode above applies.
(define_insn “zero_extendqihi2” [(set (match_operand:HI 0 “register_operand” “=r,r,r”) (zero_extend:HI (match_operand:QI 1 “nonimmediate_operand” “r,Q>,m”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “movu.b %1,%0” [(set_attr “slottable” “yes,yes,no”)]) ;; Add operations, standard names.
;; Note that for the ‘P’ constraint, the high part can be -1 or 0. We ;; output the insn through the ‘A’ output modifier as “adds.w” and “addq”, ;; respectively. (define_expand “adddi3” [(parallel [(set (match_operand:DI 0 “register_operand”) (plus:DI (match_operand:DI 1 “register_operand”) (match_operand:DI 2 “general_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" "")
(define_insn “*adddi3” [(set (match_operand:DI 0 “register_operand” “=r,r,r,&r,&r”) (plus:DI (match_operand:DI 1 “register_operand” “%0,0,0,0,r”) (match_operand:DI 2 “general_operand” “J,N,P,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ addq %2,%M0;ax;addq 0,%H0 subq %n2,%M0;ax;subq 0,%H0 add%e2.%z2 %2,%M0;ax;%A2 %H2,%H0 add.d %M2,%M0;ax;add.d %H2,%H0 add.d %M2,%M1,%M0;ax;add.d %H2,%H1,%H0”)
(define_expand “add3” [(parallel [(set (match_operand:BWD 0 “register_operand”) (plus:BWD (match_operand:BWD 1 “register_operand”) (match_operand:BWD 2 “general_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" "")
(define_insn “*addsi3” [(set (match_operand:SI 0 “register_operand” “=r,r, r,r,r,r,r, r”) (plus:SI (match_operand:SI 1 “register_operand” “%0,0, 0,0,0,0,r, r”) (match_operand:SI 2 “general_operand” “r,Q>,J,N,n,g,!To,0”))) (clobber (reg:CC CRIS_CC0_REGNUM))]
;; The last constraint is due to that after reload, the ‘%’ is not ;; honored, and canonicalization doesn't care about keeping the same ;; register as in destination. This will happen after insn splitting.
"" { switch (which_alternative) { case 0: case 1: return “add.d %2,%0”; case 2: return “addq %2,%0”; case 3: return “subq %n2,%0”; case 4: /* ‘Known value’, but not in -63..63. Check if addu/subu may be used. */ if (INTVAL (operands[2]) > 0) { if (INTVAL (operands[2]) < 256) return “addu.b %2,%0”; if (INTVAL (operands[2]) < 65536) return “addu.w %2,%0”; } else { if (INTVAL (operands[2]) >= -255) return “subu.b %n2,%0”; if (INTVAL (operands[2]) >= -65535) return “subu.w %n2,%0”; } return “add.d %2,%0”; case 5: return “add.d %2,%0”; case 6: return “add.d %2,%1,%0”; case 7: return “add.d %1,%0”; default: return “BOGUS addsi %2+%1 to %0”; } } [(set_attr “slottable” “yes,yes,yes,yes,no,no,no,yes”)]) (define_insn “*addhi3” [(set (match_operand:HI 0 “register_operand” “=r,r, r,r,r,r”) (plus:HI (match_operand:HI 1 “register_operand” “%0,0, 0,0,0,r”) (match_operand:HI 2 “general_operand” “r,Q>,J,N,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ add.w %2,%0 add.w %2,%0 addq %2,%0 subq %n2,%0 add.w %2,%0 add.w %2,%1,%0” [(set_attr “slottable” “yes,yes,yes,yes,no,no”) (set_attr “cc” “normal,normal,clobber,clobber,normal,normal”)])
(define_insn “*addqi3” [(set (match_operand:QI 0 “register_operand” “=r,r, r,r,r,r,r”) (plus:QI (match_operand:QI 1 “register_operand” “%0,0, 0,0,0,0,r”) (match_operand:QI 2 “general_operand” “r,Q>,J,N,O,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ add.b %2,%0 add.b %2,%0 addq %2,%0 subq %n2,%0 subQ -%b2,%0 add.b %2,%0 add.b %2,%1,%0” [(set_attr “slottable” “yes,yes,yes,yes,yes,no,no”) (set_attr “cc” “normal,normal,clobber,clobber,clobber,normal,normal”)]) ;; Subtract. ;; ;; Note that because of insn canonicalization these will seldom but ;; rarely be used with a known constant as an operand.
;; Note that for the ‘P’ constraint, the high part can be -1 or 0. We ;; output the insn through the ‘D’ output modifier as “subs.w” and “subq”, ;; respectively. (define_expand “subdi3” [(parallel [(set (match_operand:DI 0 “register_operand”) (minus:DI (match_operand:DI 1 “register_operand”) (match_operand:DI 2 “general_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" "")
(define_insn “*subdi3” [(set (match_operand:DI 0 “register_operand” “=r,r,r,&r,&r”) (minus:DI (match_operand:DI 1 “register_operand” “0,0,0,0,r”) (match_operand:DI 2 “general_operand” “J,N,P,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ subq %2,%M0;ax;subq 0,%H0 addq %n2,%M0;ax;addq 0,%H0 sub%e2.%z2 %2,%M0;ax;%D2 %H2,%H0 sub.d %M2,%M0;ax;sub.d %H2,%H0 sub.d %M2,%M1,%M0;ax;sub.d %H2,%H1,%H0”)
(define_expand “sub3” [(parallel [(set (match_operand:BWD 0 “register_operand”) (minus:BWD (match_operand:BWD 1 “register_operand”) (match_operand:BWD 2 “general_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" "")
(define_insn “*subsi3” [(set (match_operand:SI 0 “register_operand” “=r,r, r,r,r,r,r,r”) (minus:SI (match_operand:SI 1 “register_operand” “0,0, 0,0,0,0,0,r”) (match_operand:SI 2 “general_operand” “r,Q>,J,N,P,n,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] ""
;; This does not do the optimal: “addu.w 65535,r0” when %2 is negative. ;; But then again, %2 should not be negative.
“@ sub.d %2,%0 sub.d %2,%0 subq %2,%0 addq %n2,%0 sub%e2.%z2 %2,%0 sub.d %2,%0 sub.d %2,%0 sub.d %2,%1,%0” [(set_attr “slottable” “yes,yes,yes,yes,no,no,no,no”)]) (define_insn “*sub3” [(set (match_operand:BW 0 “register_operand” “=r,r, r,r,r,r”) (minus:BW (match_operand:BW 1 “register_operand” “0,0, 0,0,0,r”) (match_operand:BW 2 “general_operand” “r,Q>,J,N,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ sub %2,%0 sub %2,%0 subq %2,%0 addq %n2,%0 sub %2,%0 sub %2,%1,%0” [(set_attr “slottable” “yes,yes,yes,yes,no,no”) (set_attr “cc” “normal,normal,clobber,clobber,normal,normal”)]) ;; Extend versions (zero/sign) of normal add/sub (no side-effects).
;; QImode to HImode ;; FIXME: GCC should widen.
(define_insn “*qihi” [(set (match_operand:HI 0 “register_operand” “=r,r,r,r”) (plusminus:HI (match_operand:HI 1 “register_operand” “0,0,0,r”) (szext:HI (match_operand:QI 2 “nonimmediate_operand” “r,Q>,m,!To”)))) (clobber (reg:CC CRIS_CC0_REGNUM))] “GET_MODE_SIZE (GET_MODE (operands[0])) <= UNITS_PER_WORD && (operands[1] != frame_pointer_rtx || plusminus:CODE != PLUS)” “@ .b %2,%0 .b %2,%0 .b %2,%0 .b %2,%1,%0” [(set_attr “slottable” “yes,yes,no,no”) (set_attr “cc” “clobber”)])
;; FIXME: bound is actually also , but is so rarely used in this ;; form that it's not worthwhile to make that distinction. (define_insn “*si” [(set (match_operand:SI 0 “register_operand” “=r,r,r,r”) (plusminusumin:SI (match_operand:SI 1 “register_operand” “0,0,0,r”) (szext:SI (match_operand:BW 2 “nonimmediate_operand” “r,Q>,m,!To”)))) (clobber (reg:CC CRIS_CC0_REGNUM))] “(plusminusumin:CODE != UMIN || szext:CODE == ZERO_EXTEND) && (operands[1] != frame_pointer_rtx || plusminusumin:CODE != PLUS)” “@ %2,%0 %2,%0 %2,%0 %2,%1,%0” [(set_attr “slottable” “yes,yes,no,no”)]) ;; We may have swapped operands for add or bound. ;; For commutative operands, these are the canonical forms.
;; QImode to HImode
(define_insn “*addqihi_swap” [(set (match_operand:HI 0 “register_operand” “=r,r,r,r”) (plus:HI (szext:HI (match_operand:QI 2 “nonimmediate_operand” “r,Q>,m,!To”)) (match_operand:HI 1 “register_operand” “0,0,0,r”))) (clobber (reg:CC CRIS_CC0_REGNUM))] “operands[1] != frame_pointer_rtx” “@ add.b %2,%0 add.b %2,%0 add.b %2,%0 add.b %2,%1,%0” [(set_attr “slottable” “yes,yes,no,no”) (set_attr “cc” “clobber”)])
(define_insn “*si_swap” [(set (match_operand:SI 0 “register_operand” “=r,r,r,r”) (plusumin:SI (szext:SI (match_operand:BW 2 “nonimmediate_operand” “r,Q>,m,!To”)) (match_operand:SI 1 “register_operand” “0,0,0,r”))) (clobber (reg:CC CRIS_CC0_REGNUM))] “(plusumin:CODE != UMIN || szext:CODE == ZERO_EXTEND) && operands[1] != frame_pointer_rtx” “@ %2,%0 %2,%0 %2,%0 %2,%1,%0” [(set_attr “slottable” “yes,yes,no,no”)]) ;; This is the special case when we use what corresponds to the ;; instruction above in “casesi”. Do not change it to use the generic ;; pattern and “REG 15” as pc; I did that and it led to madness and ;; maintenance problems: Instead of (as imagined) recognizing and removing ;; or replacing this pattern with something simpler, other variant ;; patterns were recognized or combined, including some prefix variants ;; where the value in pc is not that of the next instruction (which means ;; this instruction actually is special and should be marked as such). ;; When switching from the “generic pattern match” approach to this simpler ;; approach, there were insignificant differences in gcc, ipps and ;; product code, somehow due to scratching reload behind the ear or ;; something. Testcase “gcc” looked .01% slower and 4 bytes bigger; ;; product code became .001% smaller but “looked better”. The testcase ;; “ipps” was just different at register allocation). ;; ;; Assumptions in the jump optimizer forces us to use IF_THEN_ELSE in this ;; pattern with the default-label as the else, with the “if” being ;; index-is-less-than the max number of cases plus one. The default-label ;; is attached to the end of the case-table at time of output.
(define_insn “*casesi_adds_w” [(set (pc) (if_then_else (ltu (match_operand:SI 0 “register_operand” “r”) (match_operand:SI 1 “const_int_operand” “n”)) (plus:SI (sign_extend:SI (mem:HI (plus:SI (mult:SI (match_dup 0) (const_int 2)) (pc)))) (pc)) (label_ref (match_operand 2 "" "")))) (use (label_ref (match_operand 3 "" ""))) (clobber (reg:CC CRIS_CC0_REGNUM))] “operands[0] != frame_pointer_rtx” “adds.w [$pc+%0.w],$pc” [(set_attr “cc” “clobber”)]) ;; Multiply instructions.
;; Sometimes powers of 2 (which are normally canonicalized to a ;; left-shift) appear here, as a result of address reloading. ;; As a special, for values 3 and 5, we can match with an addi, so add those. ;; ;; FIXME: This may be unnecessary now. ;; Explicitly named for convenience of having a gen_... function.
(define_insn “addi_mul” [(set (match_operand:SI 0 “register_operand” “=r”) (mult:SI (match_operand:SI 1 “register_operand” “%0”) (match_operand:SI 2 “const_int_operand” “n”))) (clobber (reg:CC CRIS_CC0_REGNUM))] “operands[0] != frame_pointer_rtx && operands[1] != frame_pointer_rtx && CONST_INT_P (operands[2]) && (INTVAL (operands[2]) == 2 || INTVAL (operands[2]) == 4 || INTVAL (operands[2]) == 3 || INTVAL (operands[2]) == 5)” { if (INTVAL (operands[2]) == 2) return “lslq 1,%0”; else if (INTVAL (operands[2]) == 4) return “lslq 2,%0”; else if (INTVAL (operands[2]) == 3) return “addi %0.w,%0”; else if (INTVAL (operands[2]) == 5) return “addi %0.d,%0”; return “BAD: adr_mulsi: %0=%1*%2”; } [(set_attr “slottable” “yes”) ;; No flags are changed if this insn is “addi”, but it does not seem ;; worth the trouble to distinguish that to the lslq cases. (set_attr “cc” “clobber”)])
;; The addi insn as it is normally used.
(define_insn “*addi” [(set (match_operand:SI 0 “register_operand” “=r”) (plus:SI (ashift:SI (match_operand:SI 2 “register_operand” “r”) (match_operand:SI 3 “const_int_operand” “n”)) (match_operand:SI 1 “register_operand” “0”)))] “operands[0] != frame_pointer_rtx && operands[1] != frame_pointer_rtx && CONST_INT_P (operands[3]) && (INTVAL (operands[3]) == 1 || INTVAL (operands[3]) == 2)” “addi %2%T3,%0” [(set_attr “slottable” “yes”) (set_attr “cc” “none”)])
;; The mult-vs-ashift canonicalization-cleanup plagues us: nothing in ;; reload transforms a “scaled multiplication” into an ashift in a ;; reloaded address; it's passed as-is and expected to be recognized, ;; or else we get a tell-tale “unrecognizable insn”. ;; On top of that, we should match the bare insn, as a matching ;; pattern (as opposed to e.g. a reload_load_address expander ;; changing the mul into an ashift), so can_reload_into will re-use ;; registers in the reloaded expression instead of allocating a new ;; register. (define_insn_and_split “*addi_reload” [(set (match_operand:SI 0 “register_operand” “=r”) (plus:SI (mult:SI (match_operand:SI 2 “register_operand” “r”) (match_operand:SI 3 “const_int_operand” “n”)) (match_operand:SI 1 “register_operand” “0”)))] “operands[0] != frame_pointer_rtx && operands[1] != frame_pointer_rtx && CONST_INT_P (operands[3]) && (INTVAL (operands[3]) == 2 || INTVAL (operands[3]) == 4) && (reload_in_progress || reload_completed)” “#” “&& 1” [(set (match_dup 0) (plus:SI (ashift:SI (match_dup 2) (match_dup 3)) (match_dup 1)))] “operands[3] = operands[3] == const2_rtx ? const1_rtx : const2_rtx;”)
;; This pattern is usually generated after reload, so a ‘%’ is ;; ineffective; use explicit combinations. (define_insn “*addi_b_” [(set (match_operand:BWD 0 “register_operand” “=r,r”) (plus:BWD (match_operand:BWD 1 “register_operand” “0,r”) (match_operand:BWD 2 “register_operand” “r,0”)))] "" “@ addi %2.b,%0 addi %1.b,%0” [(set_attr “slottable” “yes”)])
;; Strip the dccr clobber from addM3 with register operands, if the ;; next instruction isn‘t using it. ;; Not clobbering dccr may let cmpelim match a later compare with a ;; previous operation of interest. This has to run before cmpelim so it ;; can’t be a peephole2. See gcc.target/cris/pr93372-45.c for a ;; test-case. (define_split ;; “*add3_addi” [(parallel [(set (match_operand:BWD 0 “register_operand”) (plus:BWD (match_operand:BWD 1 “register_operand”) (match_operand:BWD 2 “register_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] “reload_completed” [(set (match_dup 0) (plus:BWD (match_dup 1) (match_dup 2)))] { rtx reg = operands[0]; rtx_insn *i = next_nonnote_nondebug_insn_bb (curr_insn);
while (i != NULL_RTX && (!INSN_P (i) || DEBUG_INSN_P (i))) i = next_nonnote_nondebug_insn_bb (i);
if (i == NULL_RTX || reg_mentioned_p (reg, i) || BARRIER_P (i)) FAIL; })
(define_insn “mul3” [(set (match_operand:WD 0 “register_operand” “=r”) (mult:WD (szext:WD (match_operand: 1 “register_operand” “%0”)) (szext:WD (match_operand: 2 “register_operand” “r”)))) (clobber (match_scratch:SI 3 “=h”)) (clobber (reg:CC CRIS_CC0_REGNUM))] “TARGET_HAS_MUL_INSNS” “%!mul %2,%0” [(set (attr “slottable”) (if_then_else (match_test “TARGET_MUL_BUG”) (const_string “no”) (const_string “yes”))) ;; For umuls.[bwd] it‘s just N unusable here, but let’s be safe. ;; For muls.b, this really extends to SImode, so cc should be ;; considered clobbered. ;; For muls.w, it‘s just N unusable here, but let’s be safe. (set_attr “cc” “clobber”)])
;; Note that gcc does not make use of such a thing as umulqisi3. It gets ;; confused and will erroneously use it instead of umulhisi3, failing (at ;; least) gcc.c-torture/execute/arith-rand.c at all optimization levels. ;; Inspection of optab code shows that there must be only one widening ;; multiplication per mode widened to.
(define_insn “mulsi3” [(set (match_operand:SI 0 “register_operand” “=r”) (mult:SI (match_operand:SI 1 “register_operand” “%0”) (match_operand:SI 2 “register_operand” “r”))) (clobber (match_scratch:SI 3 “=h”)) (clobber (reg:CC CRIS_CC0_REGNUM))] “TARGET_HAS_MUL_INSNS” “%!muls.d %2,%0” [(set (attr “slottable”) (if_then_else (match_test “TARGET_MUL_BUG”) (const_string “no”) (const_string “yes”))) ;; Just N unusable here, but let's be safe. (set_attr “cc” “clobber”)]) ;; A few multiply variations.
;; When needed, we can get the high 32 bits from the overflow ;; register. We don't care to split and optimize these.
(define_insn “mulsidi3” [(set (match_operand:DI 0 “register_operand” “=r”) (mult:DI (szext:DI (match_operand:SI 1 “register_operand” “%0”)) (szext:DI (match_operand:SI 2 “register_operand” “r”)))) (clobber (match_scratch:SI 3 “=h”)) (clobber (reg:CC CRIS_CC0_REGNUM))] “TARGET_HAS_MUL_INSNS” “%!mul.d %2,%M0;move $mof,%H0”)
;; These two patterns may be expressible by other means, perhaps by making ;; [u]?mulsidi3 a define_expand.
;; Due to register allocation braindamage, the clobber 1,2 alternatives ;; cause a move into the clobbered register before the insn, then ;; after the insn, mof is moved too, rather than the clobber assigned ;; the last mof target. This became apparent when making MOF and SRP ;; visible registers, with the necessary tweak to smulsi3_highpart. ;; Because these patterns are used in division by constants, that damage ;; is visible (ipps regression tests). Therefore the last two ;; alternatives, “helping” reload to avoid an unnecessary move, but ;; punished by force of one “?”. Check code from “int d (int a) {return ;; a / 1000;}” and unsigned. FIXME: Comment above was for 3.2, revisit.
(define_insn “mulsi3_highpart” [(set (match_operand:SI 0 “register_operand” “=h,h,?r,?r”) (truncate:SI (lshiftrt:DI (mult:DI (szext:DI (match_operand:SI 1 “register_operand” “r,r,0,r”)) (szext:DI (match_operand:SI 2 “register_operand” “r,r,r,0”))) (const_int 32)))) (clobber (match_scratch:SI 3 “=1,2,h,h”)) (clobber (reg:CC CRIS_CC0_REGNUM))] “TARGET_HAS_MUL_INSNS” “@ %!mul.d %2,%1 %!mul.d %1,%2 %!mul.d %2,%1;move $mof,%0 %!mul.d %1,%2;move $mof,%0” [(set_attr “slottable” “yes,yes,no,no”) (set_attr “cc” “clobber”)]) ;; Divide and modulus instructions. CRIS only has a step instruction.
(define_insn “dstep_shift” [(set (match_operand:SI 0 “register_operand” “=r”) (if_then_else:SI (geu:SI (ashift:SI (match_operand:SI 1 “register_operand” “0”) (const_int 1)) (match_operand:SI 2 “register_operand” “r”)) (minus:SI (ashift:SI (match_operand:SI 3 “register_operand” “0”) (const_int 1)) (match_operand:SI 4 “register_operand” “2”)) (ashift:SI (match_operand:SI 5 “register_operand” “0”) (const_int 1)))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “dstep %2,%0” [(set_attr “slottable” “yes”)])
;; Here's a variant with mult instead of ashift. ;; ;; FIXME: This should be investigated. Which one matches through combination?
(define_insn “dstep_mul” [(set (match_operand:SI 0 “register_operand” “=r”) (if_then_else:SI (geu:SI (mult:SI (match_operand:SI 1 “register_operand” “0”) (const_int 2)) (match_operand:SI 2 “register_operand” “r”)) (minus:SI (mult:SI (match_operand:SI 3 “register_operand” “0”) (const_int 2)) (match_operand:SI 4 “register_operand” “2”)) (mult:SI (match_operand:SI 5 “register_operand” “0”) (const_int 2)))) (clobber (reg:CC CRIS_CC0_REGNUM))] “operands[0] != frame_pointer_rtx && operands[1] != frame_pointer_rtx && operands[2] != frame_pointer_rtx && operands[3] != frame_pointer_rtx” “dstep %2,%0” [(set_attr “slottable” “yes”)]) ;; Logical operators.
;; Bitwise “and”.
;; There is no use in defining “anddi3”, because gcc can expand this by ;; itself, and make reasonable code without interference.
;; If the first operand is memory or a register and is the same as the ;; second operand, and the third operand is -256 or -65536, we can use ;; CLEAR instead. Or, if the first operand is a register, and the third ;; operand is 255 or 65535, we can zero_extend. ;; GCC isn't smart enough to recognize these cases (yet), and they seem ;; to be common enough to be worthwhile. ;; FIXME: This should be made obsolete.
(define_expand “andsi3” [(parallel [(set (match_operand:SI 0 “nonimmediate_operand”) (and:SI (match_operand:SI 1 “nonimmediate_operand”) (match_operand:SI 2 “general_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" { if (! (CONST_INT_P (operands[2]) && (((INTVAL (operands[2]) == -256 || INTVAL (operands[2]) == -65536) && rtx_equal_p (operands[1], operands[0])) || ((INTVAL (operands[2]) == 255 || INTVAL (operands[2]) == 65535) && REG_P (operands[0]))))) { /* Make intermediate steps if operand0 is not a register or operand1 is not a register, and hope that the reload pass will make something useful out of it. Note that the operands are not canonicalized. For the moment, I chicken out on this, because all or most ports do not describe ‘and’ with canonicalized operands, and I seem to remember magic in reload, checking that operand1 has constraint ‘%0’, in which case operand0 and operand1 must have similar predicates. FIXME: Investigate. */ rtx reg0 = REG_P (operands[0]) ? operands[0] : gen_reg_rtx (SImode); rtx reg1 = operands[1];
if (! REG_P (reg1))
{
emit_move_insn (reg0, reg1);
reg1 = reg0;
}
cris_emit_insn (gen_rtx_SET (reg0, gen_rtx_AND (SImode, reg1,
operands[2])));
/* Make sure we get the right *final* destination. */
if (! REG_P (operands[0]))
emit_move_insn (operands[0], reg0);
DONE;
}
})
;; Some special cases of andsi3.
(define_insn “*andsi_movu” [(set (match_operand:SI 0 “register_operand” “=r,r,r”) (and:SI (match_operand:SI 1 “nonimmediate_operand” “%r,Q,To”) (match_operand:SI 2 “const_int_operand” “n,n,n”))) (clobber (reg:CC CRIS_CC0_REGNUM))] “(INTVAL (operands[2]) == 255 || INTVAL (operands[2]) == 65535) && !side_effects_p (operands[1])” “movu.%z2 %1,%0” [(set_attr “slottable” “yes,yes,no”)])
;; FIXME: Remember, this does not actually affect condition codes; ;; get rid of the clobber. (define_insn “*andsi_clear” [(set (match_operand:SI 0 “nonimmediate_operand” “=r,r,Q,Q,To,To”) (and:SI (match_operand:SI 1 “nonimmediate_operand” “%0,0,0,0,0,0”) (match_operand:SI 2 “const_int_operand” “P,n,P,n,P,n”))) (clobber (reg:CC CRIS_CC0_REGNUM))] “(INTVAL (operands[2]) == -65536 || INTVAL (operands[2]) == -256) && !side_effects_p (operands[0])” “@ cLear.b %0 cLear.w %0 cLear.b %0 cLear.w %0 cLear.b %0 cLear.w %0” [(set_attr “slottable” “yes,yes,yes,yes,no,no”) (set_attr “cc” “none”)])
;; This is a catch-all pattern, taking care of everything that was not ;; matched in the insns above. ;; ;; Sidenote: the tightening from “nonimmediate_operand” to ;; “register_operand” for operand 1 actually increased the register ;; pressure (worse code). That will hopefully change with an ;; improved reload pass.
(define_insn “*expanded_andsi” [(set (match_operand:SI 0 “register_operand” “=r,r,r, r,r”) (and:SI (match_operand:SI 1 “register_operand” “%0,0,0, 0,r”) (match_operand:SI 2 “general_operand” “I,r,Q>,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ andq %2,%0 and.d %2,%0 and.d %2,%0 and.d %2,%0 and.d %2,%1,%0” [(set_attr “slottable” “yes,yes,yes,no,no”)]) ;; For both QI and HI we may use the quick patterns. This results in ;; useless condition codes, but that is used rarely enough for it to ;; normally be a win (could check ahead for use of CRIS_CC0_REGNUM, but ;; seems to be more pain than win).
;; FIXME: See note for andsi3
(define_expand “andhi3” [(parallel [(set (match_operand:HI 0 “nonimmediate_operand”) (and:HI (match_operand:HI 1 “nonimmediate_operand”) (match_operand:HI 2 “general_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" { if (! (CONST_INT_P (operands[2]) && (((INTVAL (operands[2]) == -256 || INTVAL (operands[2]) == 65280) && rtx_equal_p (operands[1], operands[0])) || (INTVAL (operands[2]) == 255 && REG_P (operands[0]))))) { /* See comment for andsi3. */ rtx reg0 = REG_P (operands[0]) ? operands[0] : gen_reg_rtx (HImode); rtx reg1 = operands[1];
if (! REG_P (reg1))
{
emit_move_insn (reg0, reg1);
reg1 = reg0;
}
cris_emit_insn (gen_rtx_SET (reg0, gen_rtx_AND (HImode, reg1,
operands[2])));
/* Make sure we get the right destination. */
if (! REG_P (operands[0]))
emit_move_insn (operands[0], reg0);
DONE;
}
})
;; Some fast andhi3 special cases.
(define_insn “*andhi_movu” [(set (match_operand:HI 0 “register_operand” “=r,r,r”) (and:HI (match_operand:HI 1 “nonimmediate_operand” “r,Q,To”) (const_int 255))) (clobber (reg:CC CRIS_CC0_REGNUM))] “!side_effects_p (operands[1])” “mOvu.b %1,%0” [(set_attr “slottable” “yes,yes,no”)])
(define_insn “*andhi_clear” [(set (match_operand:HI 0 “nonimmediate_operand” “=r,Q,To”) (and:HI (match_operand:HI 1 “nonimmediate_operand” “0,0,0”) (const_int -256))) (clobber (reg:CC CRIS_CC0_REGNUM))] “!side_effects_p (operands[0])” “cLear.b %0” [(set_attr “slottable” “yes,yes,no”) (set_attr “cc” “none”)])
;; Catch-all andhi3 pattern.
(define_insn “*expanded_andhi” [(set (match_operand:HI 0 “register_operand” “=r,r, r,r, r,r,r,r”) (and:HI (match_operand:HI 1 “register_operand” “%0,0, 0,0, 0,0,0,r”) (match_operand:HI 2 “general_operand” “I,Kc,r,Q>,L,O,g,!To”))) ;; The “Kc” alternative above, is there to match for cmpelim; ;; it will be dominated by the “I” alternative at other times. (clobber (reg:CC CRIS_CC0_REGNUM))]
;; Sidenote: the tightening from “general_operand” to ;; “register_operand” for operand 1 actually increased the register ;; pressure (worse code). That will hopefully change with an ;; improved reload pass.
"" “@ andq %2,%0 andq %2,%0 and.w %2,%0 and.w %2,%0 and.w %2,%0 anDq %b2,%0 and.w %2,%0 and.w %2,%1,%0” [(set_attr “slottable” “yes,yes,yes,yes,no,yes,no,no”) (set_attr “cc” “clobber,normal,normal,normal,normal,clobber,normal,normal”)])
;; A strict_low_part pattern.
;; Note the use of (match_dup 0) for the first operand of the operation ;; here. Reload can‘t handle an operand pair where one is read-write ;; and must match a read, like in: ;; (insn 80 79 81 4 ;; (set (strict_low_part ;; (subreg:QI (reg/v:SI 0 r0 [orig:36 data ] [36]) 0)) ;; (and:QI ;; (subreg:QI (reg:SI 15 acr [orig:27 D.7531 ] [27]) 0) ;; (const_int -64 [0xf..fc0]))) x.c:126 147 {*andqi_lowpart_v32} ;; (nil)) ;; (Note: the example is obsolete.) ;; In theory, it could reload this as a movstrictqi of the register ;; operand at the and:QI to the destination register and change the ;; and:QI operand to the same as the read-write output operand and the ;; result would be recognized, but it doesn’t recognize that's a valid ;; reload for a strict_low_part-destination; it just sees a “+” at the ;; destination constraints. Better than adding complexity to reload is ;; to follow the lead of m68k (see comment that begins with “These insns ;; must use MATCH_DUP”) since prehistoric times and make it just a ;; match_dup. FIXME: a sanity-check in gen* to refuse an insn with ;; input-constraints matching input-output-constraints, e.g. “+r” <- “0”.
(define_insn “*andhi_lowpart” [(set (strict_low_part (match_operand:HI 0 “register_operand” “+r,r,r”)) (and:HI (match_dup 0) (match_operand:HI 1 “general_operand” “r,Q>,g”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ and.w %1,%0 and.w %1,%0 and.w %1,%0” [(set_attr “slottable” “yes,yes,no”)]) (define_expand “andqi3” [(parallel [(set (match_operand:QI 0 “register_operand”) (and:QI (match_operand:QI 1 “register_operand”) (match_operand:QI 2 “general_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" "")
(define_insn “*andqi3” [(set (match_operand:QI 0 “register_operand” “=r,r, r,r, r,r,r”) (and:QI (match_operand:QI 1 “register_operand” “%0,0, 0,0, 0,0,r”) (match_operand:QI 2 “general_operand” “I,Kc,r,Q>,O,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ andq %2,%0 andq %2,%0 and.b %2,%0 and.b %2,%0 andQ %b2,%0 and.b %2,%0 and.b %2,%1,%0” [(set_attr “slottable” “yes,yes,yes,yes,yes,no,no”) (set_attr “cc” “clobber,normal,normal,normal,clobber,normal,normal”)])
(define_insn “*andqi_lowpart” [(set (strict_low_part (match_operand:QI 0 “register_operand” “+r,r,r”)) (and:QI (match_dup 0) (match_operand:QI 1 “general_operand” “r,Q>,g”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ and.b %1,%0 and.b %1,%0 and.b %1,%0” [(set_attr “slottable” “yes,yes,no”)]) ;; Bitwise or.
;; Same comment as anddi3 applies here - no need for such a pattern.
;; It seems there's no need to jump through hoops to get good code such as ;; with andsi3.
(define_expand “ior3” [(parallel [(set (match_operand:BWD 0 “register_operand”) (ior:BWD (match_operand:BWD 1 “register_operand”) (match_operand:BWD 2 “general_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" "")
(define_insn “*iorsi3” [(set (match_operand:SI 0 “register_operand” “=r,r,r, r,r,r”) (ior:SI (match_operand:SI 1 “register_operand” “%0,0,0, 0,0,r”) (match_operand:SI 2 “general_operand” “I, r,Q>,n,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ orq %2,%0 or.d %2,%0 or.d %2,%0 oR.%s2 %2,%0 or.d %2,%0 or.d %2,%1,%0” [(set_attr “slottable” “yes,yes,yes,no,no,no”) (set_attr “cc” “normal,normal,normal,clobber,normal,normal”)])
(define_insn “*iorhi3” [(set (match_operand:HI 0 “register_operand” “=r,r,r, r,r,r,r”) (ior:HI (match_operand:HI 1 “register_operand” “%0,0,0, 0,0,0,r”) (match_operand:HI 2 “general_operand” “I,r,Q>,L,O,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ orq %2,%0 or.w %2,%0 or.w %2,%0 or.w %2,%0 oRq %b2,%0 or.w %2,%0 or.w %2,%1,%0” [(set_attr “slottable” “yes,yes,yes,no,yes,no,no”) (set_attr “cc” “clobber,normal,normal,normal,clobber,normal,normal”)])
(define_insn “*iorqi3” [(set (match_operand:QI 0 “register_operand” “=r,r,r, r,r,r”) (ior:QI (match_operand:QI 1 “register_operand” “%0,0,0, 0,0,r”) (match_operand:QI 2 “general_operand” “I,r,Q>,O,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “@ orq %2,%0 or.b %2,%0 or.b %2,%0 orQ %b2,%0 or.b %2,%0 or.b %2,%1,%0” [(set_attr “slottable” “yes,yes,yes,yes,no,no”) (set_attr “cc” “clobber,normal,normal,clobber,normal,normal”)]) ;; Exclusive-or
;; See comment about “anddi3” for xordi3 - no need for such a pattern. ;; FIXME: Do we really need the shorter variants?
(define_insn “xorsi3” [(set (match_operand:SI 0 “register_operand” “=r”) (xor:SI (match_operand:SI 1 “register_operand” “%0”) (match_operand:SI 2 “register_operand” “r”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “xor %2,%0” [(set_attr “slottable” “yes”)])
(define_insn “xor3” [(set (match_operand:BW 0 “register_operand” “=r”) (xor:BW (match_operand:BW 1 “register_operand” “%0”) (match_operand:BW 2 “register_operand” “r”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “xor %2,%0” [(set_attr “slottable” “yes”) (set_attr “cc” “clobber”)]) ;; Negation insns.
;; Questionable use, here mostly as a (slightly usable) define_expand ;; example.
(define_expand “negsf2” [(parallel [(set (match_dup 2) (match_dup 3)) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_operand:SF 0 “register_operand”) (neg:SF (match_operand:SF 1 “register_operand”))) (use (match_dup 2)) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" { operands[2] = gen_reg_rtx (SImode); operands[3] = GEN_INT (1 << 31); })
(define_insn “*expanded_negsf2” [(set (match_operand:SF 0 “register_operand” “=r”) (neg:SF (match_operand:SF 1 “register_operand” “0”))) (use (match_operand:SI 2 “register_operand” “r”)) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “xor %2,%0” [(set_attr “slottable” “yes”)])
;; No “negdi2” although we could make one up that may be faster than ;; the one in libgcc.
(define_insn “neg2” [(set (match_operand:BWD 0 “register_operand” “=r”) (neg:BWD (match_operand:BWD 1 “register_operand” “r”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “neg %1,%0” [(set_attr “slottable” “yes”)]) ;; One-complements.
;; See comment on anddi3 - no need for a DImode pattern. ;; See also xor comment.
(define_insn “one_cmplsi2” [(set (match_operand:SI 0 “register_operand” “=r”) (not:SI (match_operand:SI 1 “register_operand” “0”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “not %0” [(set_attr “slottable” “yes”)])
(define_insn “one_cmpl2” [(set (match_operand:BW 0 “register_operand” “=r”) (not:BW (match_operand:BW 1 “register_operand” “0”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “not %0” [(set_attr “slottable” “yes”) (set_attr “cc” “clobber”)]) ;; Arithmetic/Logical shift right (and SI left).
(define_insn “si3” [(set (match_operand:SI 0 “register_operand” “=r”) (shift:SI (match_operand:SI 1 “register_operand” “0”) (match_operand:SI 2 “nonmemory_operand” “Kcr”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" { if (REG_S_P (operands[2])) return “.d %2,%0”;
return “q %2,%0”; } [(set_attr “slottable” “yes”)])
;; Since gcc gets lost, and forgets to zero-extend the source (or mask ;; the destination) when it changes shifts of lower modes into SImode, ;; it is better to make these expands an anonymous patterns instead of ;; the more correct define_insns. This occurs when gcc thinks that is ;; is better to widen to SImode and use immediate shift count.
;; FIXME: Is this legacy or still true for gcc >= 2.7.2?
;; FIXME: Can't parametrize sign_extend and zero_extend (before ;; mentioning “shiftrt”), so we need two patterns. (define_expand “ashr3” [(parallel [(set (match_dup 3) (sign_extend:SI (match_operand:BW 1 “nonimmediate_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 4) (zero_extend:SI (match_operand:BW 2 “nonimmediate_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 5) (ashiftrt:SI (match_dup 3) (match_dup 4))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_operand:BW 0 “general_operand”) (subreg:BW (match_dup 5) 0)) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" { int i;
for (i = 3; i < 6; i++) operands[i] = gen_reg_rtx (SImode); })
(define_expand “lshr3” [(parallel [(set (match_dup 3) (zero_extend:SI (match_operand:BW 1 “nonimmediate_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 4) (zero_extend:SI (match_operand:BW 2 “nonimmediate_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 5) (lshiftrt:SI (match_dup 3) (match_dup 4))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_operand:BW 0 “general_operand”) (subreg:BW (match_dup 5) 0)) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" { int i;
for (i = 3; i < 6; i++) operands[i] = gen_reg_rtx (SImode); })
(define_insn “*expanded_” [(set (match_operand:BW 0 “register_operand” “=r”) (shiftrt:BW (match_operand:BW 1 “register_operand” “0”) (match_operand:BW 2 “register_operand” “r”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “ %2,%0” [(set_attr “slottable” “yes”)])
(define_insn “*_lowpart” [(set (strict_low_part (match_operand:BW 0 “register_operand” “+r”)) (shiftrt:BW (match_dup 0) (match_operand:BW 1 “register_operand” “r”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “ %1,%0” [(set_attr “slottable” “yes”)]) ;; Arithmetic/logical shift left.
;; For narrower modes than SI, we can use lslq although it makes cc ;; unusable. The win is that we do not have to reload the shift-count ;; into a register.
(define_insn “ashl3” [(set (match_operand:BW 0 “register_operand” “=r,r”) (ashift:BW (match_operand:BW 1 “register_operand” “0,0”) (match_operand:BW 2 “nonmemory_operand” “r,Kc”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" { return (CONST_INT_P (operands[2]) && INTVAL (operands[2]) > ) ? “moveq 0,%0” : (CONSTANT_P (operands[2]) ? “lslq %2,%0” : “lsl %2,%0”); } [(set_attr “slottable” “yes”) (set_attr “cc” “*,clobber”)])
;; A strict_low_part matcher.
(define_insn “*ashl_lowpart” [(set (strict_low_part (match_operand:BW 0 “register_operand” “+r”)) (ashift:BW (match_dup 0) (match_operand:HI 1 “register_operand” “r”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “lsl %1,%0” [(set_attr “slottable” “yes”)]) ;; Various strange insns that gcc likes.
;; Fortunately, it is simple to construct an abssf (although it may not ;; be very much used in practice).
(define_insn “abssf2” [(set (match_operand:SF 0 “register_operand” “=r”) (abs:SF (match_operand:SF 1 “register_operand” “0”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “lslq 1,%0;lsrq 1,%0”)
(define_insn “abssi2” [(set (match_operand:SI 0 “register_operand” “=r”) (abs:SI (match_operand:SI 1 “register_operand” “r”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “abs %1,%0” [(set_attr “slottable” “yes”)])
;; FIXME: GCC should be able to do these expansions itself.
(define_expand “abs2” [(parallel [(set (match_dup 2) (sign_extend:SI (match_operand:BW 1 “general_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 3) (abs:SI (match_dup 2))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_operand:BW 0 “register_operand”) (subreg:BW (match_dup 3) 0)) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" “operands[2] = gen_reg_rtx (SImode); operands[3] = gen_reg_rtx (SImode);”)
(define_insn “clzsi2” [(set (match_operand:SI 0 “register_operand” “=r”) (clz:SI (match_operand:SI 1 “register_operand” “r”))) (clobber (reg:CC CRIS_CC0_REGNUM))] “TARGET_HAS_LZ” “lz %1,%0” [(set_attr “slottable” “yes”)])
(define_insn “bswapsi2” [(set (match_operand:SI 0 “register_operand” “=r”) (bswap:SI (match_operand:SI 1 “register_operand” “0”))) (clobber (reg:CC CRIS_CC0_REGNUM))] “TARGET_HAS_SWAP” “swapwb %0” [(set_attr “slottable” “yes”)])
;; This instruction swaps all bits in a register. ;; That means that the most significant bit is put in the place ;; of the least significant bit, and so on.
(define_insn “cris_swap_bits” [(set (match_operand:SI 0 “register_operand” “=r”) (unspec:SI [(match_operand:SI 1 “register_operand” “0”)] CRIS_UNSPEC_SWAP_BITS)) (clobber (reg:CC CRIS_CC0_REGNUM))] “TARGET_HAS_SWAP” “swapwbr %0” [(set_attr “slottable” “yes”)])
;; Implement ctz using two instructions, one for bit swap and one for clz. ;; Defines a scratch register to avoid clobbering input.
(define_expand “ctzsi2” [(parallel [(set (match_dup 2) (match_operand:SI 1 “register_operand”)) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 2) (unspec:SI [(match_dup 2)] CRIS_UNSPEC_SWAP_BITS)) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_operand:SI 0 “register_operand”) (clz:SI (match_dup 2))) (clobber (reg:CC CRIS_CC0_REGNUM))])] “TARGET_HAS_LZ && TARGET_HAS_SWAP” “operands[2] = gen_reg_rtx (SImode);”)
;; Bound-insn. Defined to be the same as an unsigned minimum, which is an ;; operation supported by gcc. Used in casesi, but used now and then in ;; normal code too.
(define_expand “uminsi3” [(parallel [(set (match_operand:SI 0 “register_operand”) (umin:SI (match_operand:SI 1 “register_operand”) (match_operand:SI 2 “general_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" "")
(define_insn “*uminsi3” [(set (match_operand:SI 0 “register_operand” “=r,r, r,r”) (umin:SI (match_operand:SI 1 “register_operand” “%0,0, 0,r”) (match_operand:SI 2 “general_operand” “r,Q>,g,!To”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" { if (CONST_INT_P (operands[2])) { /* Constant operands are zero-extended, so only 32-bit operands may be negative. */ if (INTVAL (operands[2]) >= 0) { if (INTVAL (operands[2]) < 256) return “bound.b %2,%0”;
if (INTVAL (operands[2]) < 65536)
return "bound.w %2,%0";
}
}
else if (which_alternative == 3) return “bound.d %2,%1,%0”;
return “bound.d %2,%0”; } [(set_attr “slottable” “yes,yes,no,no”)]) ;; Jump and branch insns.
(define_insn “jump” [(set (pc) (label_ref (match_operand 0 "" "")))] "" “ba %l0%#” [(set_attr “slottable” “has_slot”)])
;; Testcase gcc.c-torture/compile/991213-3.c fails if we allow a constant ;; here, since the insn is not recognized as an indirect jump by ;; jmp_uses_reg_or_mem used by computed_jump_p. Perhaps it is a kludge to ;; change from general_operand to nonimmediate_operand (at least the docs ;; should be changed), but then again the pattern is called indirect_jump. (define_expand “indirect_jump” [(set (pc) (match_operand:SI 0 “nonimmediate_operand”))] "" "")
(define_insn “*indirect_jump” [(set (pc) (match_operand:SI 0 “nonimmediate_operand” “rm”))] "" “jump %0”)
;; Return insn. Used whenever the epilogue is very simple; if it is only ;; a single ret or jump [sp+]. No allocated stack space or saved ;; registers are allowed. ;; Note that for this pattern, although named, it is ok to check the ;; context of the insn in the test, not only compiler switches.
(define_expand “return” [(return)] “cris_simple_epilogue ()” “cris_expand_return (cris_return_address_on_stack ()); DONE;”)
(define_insn “*return_expanded” [(return)] "" { return cris_return_address_on_stack_for_return () ? “jump [$sp+]” : “ret%#”; } [(set (attr “slottable”) (if_then_else (match_test “cris_return_address_on_stack_for_return ()”) (const_string “no”) (const_string “has_return_slot”)))])
(define_expand “prologue” [(const_int 0)] "" “cris_expand_prologue (); DONE;”)
(define_expand “epilogue” [(const_int 0)] "" “cris_expand_epilogue (); DONE;”) ;; Conditional branches.
(define_expand “cbranch4” [(parallel [(set (pc) (if_then_else (match_operator 0 “ordered_comparison_operator” [(match_operand:BWDD 1 “nonimmediate_operand”) (match_operand:BWDD 2 “general_operand”)]) (label_ref (match_operand 3 "")) (pc))) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" “cris_reduce_compare (&operands[0], &operands[1], &operands[2]);”)
(define_insn_and_split “*cbranch4” [(set (pc) (if_then_else (cond (match_operand:BWDD 0 “nonimmediate_operand” “<cmp_op0c>”) (match_operand:BWDD 1 “general_operand” “<cmp_op1c>”)) (label_ref (match_operand 2 "")) (pc))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “#” “&& reload_completed” [(set (reg: CRIS_CC0_REGNUM) (compare: (match_dup 0) (match_dup 1))) (set (pc) (if_then_else (cond (reg: CRIS_CC0_REGNUM) (const_int 0)) (label_ref (match_dup 2)) (pc)))] "")
;; Test a single bit at operand[0] against 0/non-0. (define_insn_and_split “*cbranch4_btstrq1_” [(set (pc) (if_then_else (zcond (zero_extract:BWD (match_operand:BWD 0 “register_operand” “r,r”) (const_int 1) (match_operand:SI 1 “nonmemory_operand” “Kc,r”)) (const_int 0)) (label_ref (match_operand 2 "")) (pc))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “#” “&& reload_completed” [(set (reg:CC_ZnN CRIS_CC0_REGNUM) (compare:CC_ZnN (zero_extract:SI (match_dup 0) (const_int 1) (match_dup 1)) (const_int 0))) (set (pc) (if_then_else (zcond (reg:CC_ZnN CRIS_CC0_REGNUM) (const_int 0)) (label_ref (match_dup 2)) (pc)))] "")
;; Test a field of bits starting at bit 0 against 0/non-0. (define_insn_and_split “*cbranch4_btstqb0_” [(set (pc) (if_then_else (zcond (zero_extract:BWD (match_operand:BWD 0 “register_operand” “r”) (match_operand 1 “const_int_operand” “Kc”) (const_int 0)) (const_int 0)) (label_ref (match_operand 2 "")) (pc))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “#” “&& reload_completed” [(set (reg:CC_NZ CRIS_CC0_REGNUM) (compare:CC_NZ (zero_extract:SI (match_dup 0) (match_dup 1) (const_int 0)) (const_int 0))) (set (pc) (if_then_else (zcond (reg:CC_NZ CRIS_CC0_REGNUM) (const_int 0)) (label_ref (match_dup 2)) (pc)))] "")
;; We suffer from the same overflow-bit-gets-in-the-way problem as ;; e.g. m68k, so we have to check if overflow bit is set on all “signed” ;; conditions.
(define_insn “*bzcond:code” [(set (pc) (if_then_else (zcond (reg:ZnNNZUSE CRIS_CC0_REGNUM) (const_int 0)) (label_ref (match_operand 0 "" "")) (pc)))] “reload_completed” { return mode == CC_ZnNmode ? “b %l0%#” : “b %l0%#”; } [(set_attr “slottable” “has_slot”)])
(define_insn “*bnzvccond:code” [(set (pc) (if_then_else (nzvccond (reg:NZVCUSE CRIS_CC0_REGNUM) (const_int 0)) (label_ref (match_operand 0 "" "")) (pc)))] “reload_completed” “b %l0%#” [(set_attr “slottable” “has_slot”)])
(define_insn “*brnzcond:code” [(set (pc) (if_then_else (rnzcond (reg:NZUSE CRIS_CC0_REGNUM) (const_int 0)) (label_ref (match_operand 0 "" "")) (pc)))] “reload_completed” { return mode == CC_NZmode ? “b %l0%#”: “b %l0%#”; } [(set_attr “slottable” “has_slot”)]) ;; Reversed anonymous patterns to the ones above, as mandated.
(define_insn “*bnzcond:code_reversed” [(set (pc) (if_then_else (nzcond (reg:ZnNNZUSE CRIS_CC0_REGNUM) (const_int 0)) (pc) (label_ref (match_operand 0 "" ""))))] “reload_completed” { return mode == CC_ZnNmode ? “b %l0%#” : “b %l0%#”; } [(set_attr “slottable” “has_slot”)])
(define_insn “*bnzvccond:code_reversed” [(set (pc) (if_then_else (nzvccond (reg:NZVCUSE CRIS_CC0_REGNUM) (const_int 0)) (pc) (label_ref (match_operand 0 "" ""))))] “reload_completed” “b %l0%#” [(set_attr “slottable” “has_slot”)])
(define_insn “*brnzcond:code_reversed” [(set (pc) (if_then_else (rnzcond (reg:NZUSE CRIS_CC0_REGNUM) (const_int 0)) (pc) (label_ref (match_operand 0 "" ""))))] “reload_completed” { return mode == CC_NZmode ? “b %l0%#” : “b %l0%#”; } [(set_attr “slottable” “has_slot”)]) ;; Set on condition: sCC.
(define_expand “cstore4” [(parallel [(set (match_operand:SI 0 “register_operand”) (match_operator:SI 1 “ordered_comparison_operator” [(match_operand:BWDD 2 “nonimmediate_operand”) (match_operand:BWDD 3 “general_operand”)])) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" “cris_reduce_compare (&operands[1], &operands[2], &operands[3]);”)
(define_insn_and_split “*cstore4” [(set (match_operand:SI 0 “register_operand” “=<sCC_destc>”) (cond:SI (match_operand:BWDD 1 “nonimmediate_operand” “<cmp_op0c>”) (match_operand:BWDD 2 “general_operand” “<cmp_op1c>”))) (clobber (reg:CC CRIS_CC0_REGNUM))] "" “#” “&& reload_completed” [(set (reg: CRIS_CC0_REGNUM) (compare: (match_dup 1) (match_dup 2))) (set (match_dup 0) (cond:SI (reg: CRIS_CC0_REGNUM) (const_int 0)))] "")
;; Like bCC, we have to check the overflow bit for ;; signed conditions.
(define_insn “*snzcond:code” [(set (match_operand:SI 0 “register_operand” “=r”) (nzcond:SI (reg:NZUSE CRIS_CC0_REGNUM) (const_int 0)))] “reload_completed” “s %0” [(set_attr “slottable” “yes”) (set_attr “cc” “none”)])
(define_insn “*srnzcond:code” [(set (match_operand:SI 0 “register_operand” “=r”) (rnzcond:SI (reg:NZUSE CRIS_CC0_REGNUM) (const_int 0)))] “reload_completed” { return mode == CC_NZmode ? “s %0” : “s %0”; } [(set_attr “slottable” “yes”) (set_attr “cc” “none”)])
(define_insn “*snzvccond:code” [(set (match_operand:SI 0 “register_operand” “=r”) (nzvccond:SI (reg:NZVCUSE CRIS_CC0_REGNUM) (const_int 0)))] “reload_completed” “s %0” [(set_attr “slottable” “yes”) (set_attr “cc” “none”)]) ;; Call insns.
;; We need to make these patterns “expand”, since the real operand is ;; hidden in a (mem:QI ) inside operand[0] (call_value: operand[1]), ;; and cannot be checked if it were a “normal” pattern. ;; Note that “call” and “call_value” are always called with a ;; mem-operand for operand 0 and 1 respective. What happens for combined ;; instructions is a different issue.
(define_expand “call” [(parallel [(call (match_operand:SI 0 “indirect_operand”) (match_operand 1 “general_operand”)) (clobber (reg:SI CRIS_SRP_REGNUM))])] "" { operands[1] = const0_rtx; })
;; Accept operands for operand 0 in order of preference.
(define_insn “*expanded_call” [(call (mem:QI (match_operand:SI 0 “general_operand” “r,Q>,g”)) (const_int 0)) (clobber (reg:SI CRIS_SRP_REGNUM))] "" “jsr %0”)
(define_expand “call_value” [(parallel [(set (match_operand 0 "") (call (match_operand:SI 1 “indirect_operand”) (match_operand 2 ""))) (clobber (reg:SI CRIS_SRP_REGNUM))])] "" { operands[2] = const0_rtx; })
;; The validity other than “general” of ;; operand 0 will be checked elsewhere. Accept operands for operand 1 in ;; order of preference (Q includes r, but r is shorter, faster). ;; We also accept a PLT symbol. We output it as [rPIC+sym:GOTPLT] rather ;; than requiring getting rPIC + sym:PLT into a register.
(define_insn “*expanded_call_value” [(set (match_operand 0 “nonimmediate_operand” “=g,g,g”) (call (mem:QI (match_operand:SI 1 “general_operand” “r,Q>,g”)) (const_int 0))) (clobber (reg:SI CRIS_SRP_REGNUM))] "" “Jsr %1” [(set_attr “cc” “clobber”)])
;; Used in debugging. No use for the direct pattern; unfilled ;; delayed-branches are taken care of by other means.
(define_insn “nop” [(const_int 0)] "" “nop” [(set_attr “cc” “none”)])
;; Same as the gdb trap breakpoint: would cause a SIGTRAP for ;; cris-linux* and will work in freestanding environments with ;; sufficient framework. (define_insn “trap” [(trap_if (const_int 1) (const_int 8))] “TARGET_TRAP_USING_BREAK8” “break 8”) ;; We need to stop accesses to the stack after the memory is ;; deallocated. Unfortunately, reorg doesn‘t look at naked clobbers, ;; e.g. (insn ... (clobber (mem:BLK (stack_pointer_rtx)))) and we don’t ;; want to use a naked (unspec_volatile) as that would stop any ;; scheduling in the epilogue. Hence we model it as a “real” insn that ;; sets the memory in an unspecified manner. FIXME: Unfortunately it ;; still has the effect of an unspec_volatile. (define_insn “cris_frame_deallocated_barrier” [(set (mem:BLK (reg:SI CRIS_SP_REGNUM)) (unspec:BLK [(const_int 0)] CRIS_UNSPEC_FRAME_DEALLOC))] "" "" [(set_attr “length” “0”)])
;; We expand on casesi so we can use “bound” and “add offset fetched from ;; a table to pc” (adds.w [pc+%0.w],pc).
;; Note: if you change the “parallel” (or add anything after it) in ;; this expansion, you must change the macro ASM_OUTPUT_CASE_END ;; accordingly, to add the default case at the end of the jump-table.
(define_expand “casesi” [(parallel [(set (match_dup 5) (match_operand:SI 0 “general_operand”)) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 6) (minus:SI (match_dup 5) (match_operand:SI 1 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 7) (umin:SI (match_dup 6) (match_operand:SI 2 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (pc) (if_then_else (ltu (match_dup 7) (match_dup 2)) (plus:SI (sign_extend:SI (mem:HI (plus:SI (mult:SI (match_dup 7) (const_int 2)) (pc)))) (pc)) (label_ref (match_operand 4 "")))) (use (label_ref (match_operand 3 ""))) (clobber (reg:CC CRIS_CC0_REGNUM))])] "" { operands[2] = plus_constant (SImode, operands[2], 1); operands[5] = gen_reg_rtx (SImode); operands[6] = gen_reg_rtx (SImode); operands[7] = gen_reg_rtx (SImode); })
(include “sync.md”) ;; Various peephole optimizations. ;; ;; Do not add patterns that you do not know will be matched. ;; Please also add a self-contained testcase.
;; We have trouble with and:s and shifts. Maybe something is broken in ;; gcc? Or it could just be that bit-field insn expansion is a bit ;; suboptimal when not having extzv insns. Or combine being over-eager ;; to canonicalize to “and”, and ignorant on the benefits of the right ;; mixture of “and” and “zero-extend”.
;; Testcase for the following peephole: gcc.target/cris/peep2-movulsr.c
;; Where equivalent and where the “and” argument doesn't fit “andq” but ;; is 16 bits or smaller, replace the “and” with a zero-extend preceding ;; the shift. A zero-extend is shorter and faster than “and” with a ;; 32-bit argument.
(define_peephole2 ; movulsr [(parallel [(set (match_operand:SI 0 “register_operand”) (lshiftrt:SI (match_dup 0) (match_operand:SI 1 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 0) (and:SI (match_dup 0) (match_operand 2 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] “INTVAL (operands[2]) > 31 && INTVAL (operands[2]) <= 0xffff && (((INTVAL (operands[2]) <= 0xff ? 0xff : 0xffff) >> INTVAL (operands[1])) == INTVAL (operands[2]))” [(parallel ;; The zero-extend is expressed as an “and”, only because that's easier ;; than messing with zero-extend of a subreg. [(set (match_dup 0) (and:SI (match_dup 0) (match_dup 3))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 0) (lshiftrt:SI (match_dup 0) (match_dup 1))) (clobber (reg:CC CRIS_CC0_REGNUM))])] { operands[3] = INTVAL (operands[2]) <= 0xff ? GEN_INT (0xff) : GEN_INT (0xffff); })
;; Testcase for the following four peepholes: gcc.target/cris/peep2-xsrand.c
(define_peephole2 ; asrandb [(parallel [(set (match_operand:SI 0 “register_operand”) (ashiftrt:SI (match_dup 0) (match_operand:SI 1 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 0) (and:SI (match_dup 0) (match_operand 2 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] “INTVAL (operands[2]) > 31 && INTVAL (operands[2]) < 255 && INTVAL (operands[1]) > 23 /* Check that the and-operation enables us to use logical-shift. */ && (INTVAL (operands[2]) & ((HOST_WIDE_INT) (HOST_WIDE_INT_M1U << (32 - INTVAL (operands[1]))))) == 0” [(parallel [(set (match_dup 0) (lshiftrt:SI (match_dup 0) (match_dup 1))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 3) (and:QI (match_dup 3) (match_dup 4))) (clobber (reg:CC CRIS_CC0_REGNUM))])] { operands[3] = gen_rtx_REG (QImode, REGNO (operands[0])); operands[4] = GEN_INT (trunc_int_for_mode (INTVAL (operands[2]), QImode)); })
(define_peephole2 ; asrandw [(parallel [(set (match_operand:SI 0 “register_operand”) (ashiftrt:SI (match_dup 0) (match_operand:SI 1 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 0) (and:SI (match_dup 0) (match_operand 2 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] “INTVAL (operands[2]) > 31 && INTVAL (operands[2]) < 65535 && INTVAL (operands[2]) != 255 && INTVAL (operands[1]) > 15 /* Check that the and-operation enables us to use logical-shift. */ && (INTVAL (operands[2]) & ((HOST_WIDE_INT) (HOST_WIDE_INT_M1U << (32 - INTVAL (operands[1]))))) == 0” [(parallel [(set (match_dup 0) (lshiftrt:SI (match_dup 0) (match_dup 1))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 3) (and:HI (match_dup 3) (match_dup 4))) (clobber (reg:CC CRIS_CC0_REGNUM))])] { operands[3] = gen_rtx_REG (HImode, REGNO (operands[0])); operands[4] = GEN_INT (trunc_int_for_mode (INTVAL (operands[2]), HImode)); })
(define_peephole2 ; lsrandb [(parallel [(set (match_operand:SI 0 “register_operand”) (lshiftrt:SI (match_dup 0) (match_operand:SI 1 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 0) (and:SI (match_dup 0) (match_operand 2 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] “INTVAL (operands[2]) > 31 && INTVAL (operands[2]) < 255 && INTVAL (operands[1]) > 23” [(parallel [(set (match_dup 0) (lshiftrt:SI (match_dup 0) (match_dup 1))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 3) (and:QI (match_dup 3) (match_dup 4))) (clobber (reg:CC CRIS_CC0_REGNUM))])] { operands[3] = gen_rtx_REG (QImode, REGNO (operands[0])); operands[4] = GEN_INT (trunc_int_for_mode (INTVAL (operands[2]), QImode)); })
(define_peephole2 ; lsrandw [(parallel [(set (match_operand:SI 0 “register_operand”) (lshiftrt:SI (match_dup 0) (match_operand:SI 1 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 0) (and:SI (match_dup 0) (match_operand 2 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] “INTVAL (operands[2]) > 31 && INTVAL (operands[2]) < 65535 && INTVAL (operands[2]) != 255 && INTVAL (operands[1]) > 15” [(parallel [(set (match_dup 0) (lshiftrt:SI (match_dup 0) (match_dup 1))) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 3) (and:HI (match_dup 3) (match_dup 4))) (clobber (reg:CC CRIS_CC0_REGNUM))])] { operands[3] = gen_rtx_REG (HImode, REGNO (operands[0])); operands[4] = GEN_INT (trunc_int_for_mode (INTVAL (operands[2]), HImode)); })
;; There seems to be no other way to make GCC (including 4.8/trunk at ;; r186932) optimally reload an instruction that looks like ;; and.d reg_or_mem,const_32__65535,other_reg ;; where other_reg is the destination. ;; It should be: ;; movu.[bw] reg_or_mem,reg_32 ;; and.[bw] trunc_int_for_mode([bw], const_32__65535),reg_32 ;; or andq ;; but it turns into: ;; move.d reg_or_mem,reg_32 ;; and.d const_32__65535,reg_32 ;; Fix it with these two peephole2's. ;; Testcases: gcc.target/cris/peep2-andu1.c gcc.target/cris/peep2-andu2.c
(define_peephole2 ; andu [(parallel [(set (match_operand:SI 0 “register_operand”) (match_operand:SI 1 “nonimmediate_operand”)) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_operand:SI 2 “register_operand”) (and:SI (match_dup 0) (match_operand:SI 3 “const_int_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] ;; Since the size of the memory access could be made different here, ;; don't do this for a mem-volatile access. “REGNO (operands[2]) == REGNO (operands[0]) && INTVAL (operands[3]) <= 65535 && INTVAL (operands[3]) >= 0 && !satisfies_constraint_I (operands[3]) && !side_effects_p (operands[1]) && (!REG_P (operands[1]) || REGNO (operands[1]) <= CRIS_LAST_GENERAL_REGISTER)” [(parallel [(set (match_dup 0) (match_dup 4)) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 5) (match_dup 6)) (clobber (reg:CC CRIS_CC0_REGNUM))])] { machine_mode zmode = INTVAL (operands[3]) <= 255 ? QImode : HImode; machine_mode amode = satisfies_constraint_O (operands[3]) ? SImode : zmode; rtx op1 = (REG_S_P (operands[1]) ? gen_rtx_REG (zmode, REGNO (operands[1])) : adjust_address (operands[1], zmode, 0)); operands[4] = gen_rtx_ZERO_EXTEND (SImode, op1); operands[5] = gen_rtx_REG (amode, REGNO (operands[0])); operands[6] = gen_rtx_AND (amode, gen_rtx_REG (amode, REGNO (operands[0])), GEN_INT (trunc_int_for_mode (INTVAL (operands[3]), amode == SImode ? QImode : amode))); })
;; Since r186861, gcc.target/cris/peep2-andu2.c trigs this pattern, with which ;; we fix up e.g.: ;; movu.b 254,$r9. ;; and.d $r10,$r9 ;; into: ;; movu.b $r10,$r9 ;; andq -2,$r9. ;; Only do this for values fitting the quick immediate operand. (define_peephole2 ; andqu [(parallel [(set (match_operand:SI 0 “register_operand”) (match_operand:SI 1 “const_int_operand”)) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 0) (and:SI (match_dup 0) (match_operand:SI 2 “nonimmediate_operand”))) (clobber (reg:CC CRIS_CC0_REGNUM))])] ;; Since the size of the memory access will be made different here, ;; don't do this for a volatile access or a post-incremented address. “satisfies_constraint_O (operands[1]) && !side_effects_p (operands[2]) && !reg_overlap_mentioned_p (operands[0], operands[2])” [(parallel [(set (match_dup 0) (match_dup 3)) (clobber (reg:CC CRIS_CC0_REGNUM))]) (parallel [(set (match_dup 0) (and:SI (match_dup 0) (match_dup 4))) (clobber (reg:CC CRIS_CC0_REGNUM))])] { machine_mode zmode = INTVAL (operands[1]) <= 255 ? QImode : HImode; rtx op1 = (REG_S_P (operands[2]) ? gen_rtx_REG (zmode, REGNO (operands[2])) : adjust_address (operands[2], zmode, 0)); operands[3] = gen_rtx_ZERO_EXTEND (SImode, op1); operands[4] = GEN_INT (trunc_int_for_mode (INTVAL (operands[1]), QImode)); }) ;; Local variables: ;; mode:emacs-lisp ;; comment-start: ";; " ;; eval: (set-syntax-table (copy-sequence (syntax-table))) ;; eval: (modify-syntax-entry ?[ “(]”) ;; eval: (modify-syntax-entry ?] “)[”) ;; eval: (modify-syntax-entry ?{ “(}”) ;; eval: (modify-syntax-entry ?} “){”) ;; eval: (setq indent-tabs-mode t) ;; End: