;; Machine description for AArch64 architecture.
;; Copyright (C) 2009-2013 Free Software Foundation, Inc.
;; Contributed by ARM Ltd.
;;
;; This file is part of GCC.
;;
;; GCC is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 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/>.

;; -------------------------------------------------------------------
;; Mode Iterators
;; -------------------------------------------------------------------


;; Iterator for General Purpose Integer registers (32- and 64-bit modes)
(define_mode_iterator GPI [SI DI])

;; Iterator for QI and HI modes
(define_mode_iterator SHORT [QI HI])

;; Iterator for all integer modes (up to 64-bit)
(define_mode_iterator ALLI [QI HI SI DI])

;; Iterator scalar modes (up to 64-bit)
(define_mode_iterator SDQ_I [QI HI SI DI])

;; Iterator for all integer modes that can be extended (up to 64-bit)
(define_mode_iterator ALLX [QI HI SI])

;; Iterator for General Purpose Floating-point registers (32- and 64-bit modes)
(define_mode_iterator GPF [SF DF])

;; Integer vector modes.
(define_mode_iterator VDQ [V8QI V16QI V4HI V8HI V2SI V4SI V2DI])

;; Integer vector modes.
(define_mode_iterator VDQ_I [V8QI V16QI V4HI V8HI V2SI V4SI V2DI])

;; vector and scalar, 64 & 128-bit container, all integer modes
(define_mode_iterator VSDQ_I [V8QI V16QI V4HI V8HI V2SI V4SI V2DI QI HI SI DI])

;; vector and scalar, 64 & 128-bit container: all vector integer modes;
;; 64-bit scalar integer mode
(define_mode_iterator VSDQ_I_DI [V8QI V16QI V4HI V8HI V2SI V4SI V2DI DI])

;; Double vector modes.
(define_mode_iterator VD [V8QI V4HI V2SI V2SF])

;; vector, 64-bit container, all integer modes
(define_mode_iterator VD_BHSI [V8QI V4HI V2SI])

;; 128 and 64-bit container; 8, 16, 32-bit vector integer modes
(define_mode_iterator VDQ_BHSI [V8QI V16QI V4HI V8HI V2SI V4SI])

;; Quad vector modes.
(define_mode_iterator VQ [V16QI V8HI V4SI V2DI V4SF V2DF])

;; All vector modes, except double.
(define_mode_iterator VQ_S [V8QI V16QI V4HI V8HI V2SI V4SI])

;; Vector and scalar, 64 & 128-bit container: all vector integer mode;
;; 8, 16, 32-bit scalar integer modes
(define_mode_iterator VSDQ_I_BHSI [V8QI V16QI V4HI V8HI V2SI V4SI V2DI QI HI SI])

;; Vector modes for moves.
(define_mode_iterator VDQM [V8QI V16QI V4HI V8HI V2SI V4SI])

;; This mode iterator allows :PTR to be used for patterns that operate on
;; pointer-sized quantities.  Exactly one of the two alternatives will match.
(define_mode_iterator PTR [(SI "Pmode == SImode") (DI "Pmode == DImode")])

;; Vector Float modes.
(define_mode_iterator VDQF [V2SF V4SF V2DF])

;; All Float modes.
(define_mode_iterator VALLF [V2SF V4SF V2DF SF DF])

;; Vector Float modes with 2 elements.
(define_mode_iterator V2F [V2SF V2DF])

;; All modes.
(define_mode_iterator VALL [V8QI V16QI V4HI V8HI V2SI V4SI V2DI V2SF V4SF V2DF])

;; All vector modes and DI.
(define_mode_iterator VALLDI [V8QI V16QI V4HI V8HI V2SI V4SI V2DI V2SF V4SF V2DF DI])

;; Vector modes for Integer reduction across lanes.
(define_mode_iterator VDQV [V8QI V16QI V4HI V8HI V4SI])

;; All double integer narrow-able modes.
(define_mode_iterator VDN [V4HI V2SI DI])

;; All quad integer narrow-able modes.
(define_mode_iterator VQN [V8HI V4SI V2DI])

;; All double integer widen-able modes.
(define_mode_iterator VDW [V8QI V4HI V2SI])

;; Vector and scalar 128-bit container: narrowable 16, 32, 64-bit integer modes
(define_mode_iterator VSQN_HSDI [V8HI V4SI V2DI HI SI DI])

;; All quad integer widen-able modes.
(define_mode_iterator VQW [V16QI V8HI V4SI])

;; Double vector modes for combines.
(define_mode_iterator VDC [V8QI V4HI V2SI V2SF DI DF])

;; Double vector modes for combines.
(define_mode_iterator VDIC [V8QI V4HI V2SI])

;; Double vector modes.
(define_mode_iterator VD_RE [V8QI V4HI V2SI DI DF V2SF])

;; Vector modes except double int.
(define_mode_iterator VDQIF [V8QI V16QI V4HI V8HI V2SI V4SI V2SF V4SF V2DF])

;; Vector modes for H and S types.
(define_mode_iterator VDQHS [V4HI V8HI V2SI V4SI])

;; Vector and scalar integer modes for H and S
(define_mode_iterator VSDQ_HSI [V4HI V8HI V2SI V4SI HI SI])

;; Vector and scalar 64-bit container: 16, 32-bit integer modes
(define_mode_iterator VSD_HSI [V4HI V2SI HI SI])

;; Vector 64-bit container: 16, 32-bit integer modes
(define_mode_iterator VD_HSI [V4HI V2SI])

;; Scalar 64-bit container: 16, 32-bit integer modes
(define_mode_iterator SD_HSI [HI SI])

;; Vector 64-bit container: 16, 32-bit integer modes
(define_mode_iterator VQ_HSI [V8HI V4SI])

;; All byte modes.
(define_mode_iterator VB [V8QI V16QI])

(define_mode_iterator TX [TI TF])

;; Opaque structure modes.
(define_mode_iterator VSTRUCT [OI CI XI])

;; Double scalar modes
(define_mode_iterator DX [DI DF])

;; ------------------------------------------------------------------
;; Unspec enumerations for Advance SIMD. These could well go into
;; aarch64.md but for their use in int_iterators here.
;; ------------------------------------------------------------------

(define_c_enum "unspec"
 [
    UNSPEC_ASHIFT_SIGNED	; Used in aarch-simd.md.
    UNSPEC_ASHIFT_UNSIGNED	; Used in aarch64-simd.md.
    UNSPEC_FMAXV	; Used in aarch64-simd.md.
    UNSPEC_FMINV	; Used in aarch64-simd.md.
    UNSPEC_FADDV	; Used in aarch64-simd.md.
    UNSPEC_ADDV		; Used in aarch64-simd.md.
    UNSPEC_SMAXV	; Used in aarch64-simd.md.
    UNSPEC_SMINV	; Used in aarch64-simd.md.
    UNSPEC_UMAXV	; Used in aarch64-simd.md.
    UNSPEC_UMINV	; Used in aarch64-simd.md.
    UNSPEC_SHADD	; Used in aarch64-simd.md.
    UNSPEC_UHADD	; Used in aarch64-simd.md.
    UNSPEC_SRHADD	; Used in aarch64-simd.md.
    UNSPEC_URHADD	; Used in aarch64-simd.md.
    UNSPEC_SHSUB	; Used in aarch64-simd.md.
    UNSPEC_UHSUB	; Used in aarch64-simd.md.
    UNSPEC_SRHSUB	; Used in aarch64-simd.md.
    UNSPEC_URHSUB	; Used in aarch64-simd.md.
    UNSPEC_ADDHN	; Used in aarch64-simd.md.
    UNSPEC_RADDHN	; Used in aarch64-simd.md.
    UNSPEC_SUBHN	; Used in aarch64-simd.md.
    UNSPEC_RSUBHN	; Used in aarch64-simd.md.
    UNSPEC_ADDHN2	; Used in aarch64-simd.md.
    UNSPEC_RADDHN2	; Used in aarch64-simd.md.
    UNSPEC_SUBHN2	; Used in aarch64-simd.md.
    UNSPEC_RSUBHN2	; Used in aarch64-simd.md.
    UNSPEC_SQDMULH	; Used in aarch64-simd.md.
    UNSPEC_SQRDMULH	; Used in aarch64-simd.md.
    UNSPEC_PMUL		; Used in aarch64-simd.md.
    UNSPEC_USQADD	; Used in aarch64-simd.md.
    UNSPEC_SUQADD	; Used in aarch64-simd.md.
    UNSPEC_SQXTUN	; Used in aarch64-simd.md.
    UNSPEC_SQXTN	; Used in aarch64-simd.md.
    UNSPEC_UQXTN	; Used in aarch64-simd.md.
    UNSPEC_SSRA		; Used in aarch64-simd.md.
    UNSPEC_USRA		; Used in aarch64-simd.md.
    UNSPEC_SRSRA	; Used in aarch64-simd.md.
    UNSPEC_URSRA	; Used in aarch64-simd.md.
    UNSPEC_SRSHR	; Used in aarch64-simd.md.
    UNSPEC_URSHR	; Used in aarch64-simd.md.
    UNSPEC_SQSHLU	; Used in aarch64-simd.md.
    UNSPEC_SQSHL	; Used in aarch64-simd.md.
    UNSPEC_UQSHL	; Used in aarch64-simd.md.
    UNSPEC_SQSHRUN	; Used in aarch64-simd.md.
    UNSPEC_SQRSHRUN	; Used in aarch64-simd.md.
    UNSPEC_SQSHRN	; Used in aarch64-simd.md.
    UNSPEC_UQSHRN	; Used in aarch64-simd.md.
    UNSPEC_SQRSHRN	; Used in aarch64-simd.md.
    UNSPEC_UQRSHRN	; Used in aarch64-simd.md.
    UNSPEC_SSHL		; Used in aarch64-simd.md.
    UNSPEC_USHL		; Used in aarch64-simd.md.
    UNSPEC_SRSHL	; Used in aarch64-simd.md.
    UNSPEC_URSHL	; Used in aarch64-simd.md.
    UNSPEC_SQRSHL	; Used in aarch64-simd.md.
    UNSPEC_UQRSHL	; Used in aarch64-simd.md.
    UNSPEC_SSLI		; Used in aarch64-simd.md.
    UNSPEC_USLI		; Used in aarch64-simd.md.
    UNSPEC_SSRI		; Used in aarch64-simd.md.
    UNSPEC_USRI		; Used in aarch64-simd.md.
    UNSPEC_SSHLL	; Used in aarch64-simd.md.
    UNSPEC_USHLL	; Used in aarch64-simd.md.
    UNSPEC_ADDP		; Used in aarch64-simd.md.
    UNSPEC_FMAX		; Used in aarch64-simd.md.
    UNSPEC_FMIN		; Used in aarch64-simd.md.
    UNSPEC_BSL		; Used in aarch64-simd.md.
    UNSPEC_TBL		; Used in vector permute patterns.
    UNSPEC_CONCAT	; Used in vector permute patterns.
    UNSPEC_ZIP1		; Used in vector permute patterns.
    UNSPEC_ZIP2		; Used in vector permute patterns.
    UNSPEC_UZP1		; Used in vector permute patterns.
    UNSPEC_UZP2		; Used in vector permute patterns.
    UNSPEC_TRN1		; Used in vector permute patterns.
    UNSPEC_TRN2		; Used in vector permute patterns.
])

;; -------------------------------------------------------------------
;; Mode attributes
;; -------------------------------------------------------------------

;; In GPI templates, a string like "%<w>0" will expand to "%w0" in the
;; 32-bit version and "%x0" in the 64-bit version.
(define_mode_attr w [(QI "w") (HI "w") (SI "w") (DI "x") (SF "s") (DF "d")])

;; For scalar usage of vector/FP registers
(define_mode_attr v [(QI "b") (HI "h") (SI "s") (DI "d")
		    (SF "s") (DF "d")
		    (V8QI "") (V16QI "")
		    (V4HI "") (V8HI "")
		    (V2SI "") (V4SI  "")
		    (V2DI "") (V2SF "")
		    (V4SF "") (V2DF "")])

;; For scalar usage of vector/FP registers, narrowing
(define_mode_attr vn2 [(QI "") (HI "b") (SI "h") (DI "s")
		    (V8QI "") (V16QI "")
		    (V4HI "") (V8HI "")
		    (V2SI "") (V4SI  "")
		    (V2DI "") (V2SF "")
		    (V4SF "") (V2DF "")])

;; For scalar usage of vector/FP registers, widening
(define_mode_attr vw2 [(DI "") (QI "h") (HI "s") (SI "d")
		    (V8QI "") (V16QI "")
		    (V4HI "") (V8HI "")
		    (V2SI "") (V4SI  "")
		    (V2DI "") (V2SF "")
		    (V4SF "") (V2DF "")])

;; Map a floating point mode to the appropriate register name prefix
(define_mode_attr s [(SF "s") (DF "d")])

;; Give the length suffix letter for a sign- or zero-extension.
(define_mode_attr size [(QI "b") (HI "h") (SI "w")])

;; Give the number of bits in the mode
(define_mode_attr sizen [(QI "8") (HI "16") (SI "32") (DI "64")])

;; Give the ordinal of the MSB in the mode
(define_mode_attr sizem1 [(QI "#7") (HI "#15") (SI "#31") (DI "#63")])

;; Attribute to describe constants acceptable in logical operations
(define_mode_attr lconst [(SI "K") (DI "L")])

;; Attribute to describe constants acceptable in atomic logical operations
(define_mode_attr lconst_atomic [(QI "K") (HI "K") (SI "K") (DI "L")])

;; Map a mode to a specific constraint character.
(define_mode_attr cmode [(QI "q") (HI "h") (SI "s") (DI "d")])

(define_mode_attr Vtype [(V8QI "8b") (V16QI "16b")
			 (V4HI "4h") (V8HI  "8h")
                         (V2SI "2s") (V4SI  "4s")
                         (DI   "1d") (DF    "1d")
                         (V2DI "2d") (V2SF "2s")
			 (V4SF "4s") (V2DF "2d")])

(define_mode_attr Vmtype [(V8QI ".8b") (V16QI ".16b")
			 (V4HI ".4h") (V8HI  ".8h")
			 (V2SI ".2s") (V4SI  ".4s")
			 (V2DI ".2d") (V2SF ".2s")
			 (V4SF ".4s") (V2DF ".2d")
			 (DI   "")    (SI   "")
			 (HI   "")    (QI   "")
			 (TI   "")    (SF   "")
			 (DF   "")])

;; Register suffix narrowed modes for VQN.
(define_mode_attr Vmntype [(V8HI ".8b") (V4SI ".4h")
			   (V2DI ".2s")
			   (DI   "")    (SI   "")
			   (HI   "")])

;; Mode-to-individual element type mapping.
(define_mode_attr Vetype [(V8QI "b") (V16QI "b")
			  (V4HI "h") (V8HI  "h")
                          (V2SI "s") (V4SI  "s")
			  (V2DI "d") (V2SF  "s")
			  (V4SF "s") (V2DF  "d")
			  (QI "b")   (HI "h")
			  (SI "s")   (DI "d")])

;; Mode-to-bitwise operation type mapping.
(define_mode_attr Vbtype [(V8QI "8b")  (V16QI "16b")
			  (V4HI "8b") (V8HI  "16b")
			  (V2SI "8b") (V4SI  "16b")
			  (V2DI "16b") (V2SF  "8b")
			  (V4SF "16b") (V2DF  "16b")])

;; Define element mode for each vector mode.
(define_mode_attr VEL [(V8QI "QI") (V16QI "QI")
			(V4HI "HI") (V8HI "HI")
                        (V2SI "SI") (V4SI "SI")
                        (DI "DI")   (V2DI "DI")
                        (V2SF "SF") (V4SF "SF")
                        (V2DF "DF")
			(SI   "SI") (HI   "HI")
			(QI   "QI")])

;; Define container mode for lane selection.
(define_mode_attr VCOND [(V4HI "V4HI") (V8HI "V4HI")
			 (V2SI "V2SI") (V4SI "V2SI")
			 (DI   "DI") (V2DI "DI")
			 (V2SF "V2SF") (V4SF "V2SF")
			 (V2DF "DF")])

;; Define container mode for lane selection.
(define_mode_attr VCONQ [(V8QI "V16QI") (V16QI "V16QI")
			 (V4HI "V8HI") (V8HI "V8HI")
			 (V2SI "V4SI") (V4SI "V4SI")
			 (DI   "V2DI") (V2DI "V2DI")
			 (V2SF "V2SF") (V4SF "V4SF")
			 (V2DF "V2DF") (SI   "V4SI")
			 (HI   "V8HI") (QI   "V16QI")])

;; Define container mode for lane selection.
(define_mode_attr VCON [(V8QI "V16QI") (V16QI "V16QI")
			(V4HI "V8HI") (V8HI "V8HI")
			(V2SI "V4SI") (V4SI "V4SI")
			(DI   "V2DI") (V2DI "V2DI")
			(V2SF "V2SF") (V4SF "V4SF")
			(V2DF "V2DF") (SI   "V4SI")
			(HI   "V8HI") (QI   "V16QI")])

;; Half modes of all vector modes.
(define_mode_attr VHALF [(V8QI "V4QI")  (V16QI "V8QI")
			 (V4HI "V2HI")  (V8HI  "V4HI")
			 (V2SI "SI")    (V4SI  "V2SI")
			 (V2DI "DI")    (V2SF  "SF")
			 (V4SF "V2SF")  (V2DF  "DF")])

;; Double modes of vector modes.
(define_mode_attr VDBL [(V8QI "V16QI") (V4HI "V8HI")
			(V2SI "V4SI")  (V2SF "V4SF")
			(SI   "V2SI")  (DI   "V2DI")
			(DF   "V2DF")])

;; Double modes of vector modes (lower case).
(define_mode_attr Vdbl [(V8QI "v16qi") (V4HI "v8hi")
			(V2SI "v4si")  (V2SF "v4sf")
			(SI   "v2si")  (DI   "v2di")])

;; Narrowed modes for VDN.
(define_mode_attr VNARROWD [(V4HI "V8QI") (V2SI "V4HI")
			    (DI   "V2SI")])

;; Narrowed double-modes for VQN (Used for XTN).
(define_mode_attr VNARROWQ [(V8HI "V8QI") (V4SI "V4HI")
			    (V2DI "V2SI")
			    (DI	  "SI")	  (SI	"HI")
			    (HI	  "QI")])

;; Narrowed quad-modes for VQN (Used for XTN2).
(define_mode_attr VNARROWQ2 [(V8HI "V16QI") (V4SI "V8HI")
			     (V2DI "V4SI")])

;; Register suffix narrowed modes for VQN.
(define_mode_attr Vntype [(V8HI "8b") (V4SI "4h")
			  (V2DI "2s")])

;; Register suffix narrowed modes for VQN.
(define_mode_attr V2ntype [(V8HI "16b") (V4SI "8h")
			   (V2DI "4s")])

;; Widened modes of vector modes.
(define_mode_attr VWIDE [(V8QI "V8HI") (V4HI "V4SI")
			 (V2SI "V2DI") (V16QI "V8HI") 
			 (V8HI "V4SI") (V4SI "V2DI")
			 (HI "SI")     (SI "DI")]

)

;; Widened mode register suffixes for VDW/VQW.
(define_mode_attr Vwtype [(V8QI "8h") (V4HI "4s")
			  (V2SI "2d") (V16QI "8h") 
			  (V8HI "4s") (V4SI "2d")])

;; Widened mode register suffixes for VDW/VQW.
(define_mode_attr Vmwtype [(V8QI ".8h") (V4HI ".4s")
			   (V2SI ".2d") (V16QI ".8h") 
			   (V8HI ".4s") (V4SI ".2d")
			   (SI   "")    (HI   "")])

;; Lower part register suffixes for VQW.
(define_mode_attr Vhalftype [(V16QI "8b") (V8HI "4h")
			     (V4SI "2s")])

;; Define corresponding core/FP element mode for each vector mode.
(define_mode_attr vw   [(V8QI "w") (V16QI "w")
                        (V4HI "w") (V8HI "w")
                        (V2SI "w") (V4SI "w")
                        (DI   "x") (V2DI "x")
                        (V2SF "s") (V4SF "s")
                        (V2DF "d")])

;; Double vector types for ALLX.
(define_mode_attr Vallxd [(QI "8b") (HI "4h") (SI "2s")])

;; Mode of result of comparison operations.
(define_mode_attr V_cmp_result [(V8QI "V8QI") (V16QI "V16QI")
				(V4HI "V4HI") (V8HI  "V8HI")
				(V2SI "V2SI") (V4SI  "V4SI")
				(DI   "DI")   (V2DI  "V2DI")
				(V2SF "V2SI") (V4SF  "V4SI")
				(V2DF "V2DI") (DF    "DI")
				(SF   "SI")])

;; Lower case mode of results of comparison operations.
(define_mode_attr v_cmp_result [(V8QI "v8qi") (V16QI "v16qi")
				(V4HI "v4hi") (V8HI  "v8hi")
				(V2SI "v2si") (V4SI  "v4si")
				(DI   "di")   (V2DI  "v2di")
				(V2SF "v2si") (V4SF  "v4si")
				(V2DF "v2di") (DF    "di")
				(SF   "si")])

;; Vm for lane instructions is restricted to FP_LO_REGS.
(define_mode_attr vwx [(V4HI "x") (V8HI "x") (HI "x")
		       (V2SI "w") (V4SI "w") (SI "w")])

(define_mode_attr Vendreg [(OI "T") (CI "U") (XI "V")])

(define_mode_attr nregs [(OI "2") (CI "3") (XI "4")])

(define_mode_attr VRL2 [(V8QI "V32QI") (V4HI "V16HI")
			(V2SI "V8SI")  (V2SF "V8SF")
			(DI   "V4DI")  (DF   "V4DF")
			(V16QI "V32QI") (V8HI "V16HI")
			(V4SI "V8SI")  (V4SF "V8SF")
			(V2DI "V4DI")  (V2DF "V4DF")])

(define_mode_attr VRL3 [(V8QI "V48QI") (V4HI "V24HI")
			(V2SI "V12SI")  (V2SF "V12SF")
			(DI   "V6DI")  (DF   "V6DF")
			(V16QI "V48QI") (V8HI "V24HI")
			(V4SI "V12SI")  (V4SF "V12SF")
			(V2DI "V6DI")  (V2DF "V6DF")])

(define_mode_attr VRL4 [(V8QI "V64QI") (V4HI "V32HI")
			(V2SI "V16SI")  (V2SF "V16SF")
			(DI   "V8DI")  (DF   "V8DF")
			(V16QI "V64QI") (V8HI "V32HI")
			(V4SI "V16SI")  (V4SF "V16SF")
			(V2DI "V8DI")  (V2DF "V8DF")])

(define_mode_attr VSTRUCT_DREG [(OI "TI") (CI "EI") (XI "OI")])

;; Mode for atomic operation suffixes
(define_mode_attr atomic_sfx
  [(QI "b") (HI "h") (SI "") (DI "")])

(define_mode_attr fcvt_target [(V2DF "v2di") (V4SF "v4si") (V2SF "v2si")])
(define_mode_attr FCVT_TARGET [(V2DF "V2DI") (V4SF "V4SI") (V2SF "V2SI")])

;; -------------------------------------------------------------------
;; Code Iterators
;; -------------------------------------------------------------------

;; This code iterator allows the various shifts supported on the core
(define_code_iterator SHIFT [ashift ashiftrt lshiftrt rotatert])

;; This code iterator allows the shifts supported in arithmetic instructions
(define_code_iterator ASHIFT [ashift ashiftrt lshiftrt])

;; Code iterator for logical operations
(define_code_iterator LOGICAL [and ior xor])

;; Code iterator for sign/zero extension
(define_code_iterator ANY_EXTEND [sign_extend zero_extend])

;; All division operations (signed/unsigned)
(define_code_iterator ANY_DIV [div udiv])

;; Code iterator for sign/zero extraction
(define_code_iterator ANY_EXTRACT [sign_extract zero_extract])

;; Code iterator for equality comparisons
(define_code_iterator EQL [eq ne])

;; Code iterator for less-than and greater/equal-to
(define_code_iterator LTGE [lt ge])

;; Iterator for __sync_<op> operations that where the operation can be
;; represented directly RTL.  This is all of the sync operations bar
;; nand.
(define_code_iterator atomic_op [plus minus ior xor and])

;; Iterator for integer conversions
(define_code_iterator FIXUORS [fix unsigned_fix])

;; Code iterator for variants of vector max and min.
(define_code_iterator MAXMIN [smax smin umax umin])

;; Code iterator for variants of vector max and min.
(define_code_iterator ADDSUB [plus minus])

;; Code iterator for variants of vector saturating binary ops.
(define_code_iterator BINQOPS [ss_plus us_plus ss_minus us_minus])

;; Code iterator for variants of vector saturating unary ops.
(define_code_iterator UNQOPS [ss_neg ss_abs])

;; Code iterator for signed variants of vector saturating binary ops.
(define_code_iterator SBINQOPS [ss_plus ss_minus])

;; Comparison operators for <F>CM.
(define_code_iterator COMPARISONS [lt le eq ge gt])

;; Unsigned comparison operators.
(define_code_iterator UCOMPARISONS [ltu leu geu gtu])

;; -------------------------------------------------------------------
;; Code Attributes
;; -------------------------------------------------------------------
;; Map rtl objects to optab names
(define_code_attr optab [(ashift "ashl")
			 (ashiftrt "ashr")
			 (lshiftrt "lshr")
			 (rotatert "rotr")
			 (sign_extend "extend")
			 (zero_extend "zero_extend")
			 (sign_extract "extv")
			 (zero_extract "extzv")
			 (and "and")
			 (ior "ior")
			 (xor "xor")
			 (not "one_cmpl")
			 (neg "neg")
			 (plus "add")
			 (minus "sub")
			 (ss_plus "qadd")
			 (us_plus "qadd")
			 (ss_minus "qsub")
			 (us_minus "qsub")
			 (ss_neg "qneg")
			 (ss_abs "qabs")
			 (eq "eq")
			 (ne "ne")
			 (lt "lt")
			 (ge "ge")
			 (le "le")
			 (gt "gt")
			 (ltu "ltu")
			 (leu "leu")
			 (geu "geu")
			 (gtu "gtu")])

;; For comparison operators we use the FCM* and CM* instructions.
;; As there are no CMLE or CMLT instructions which act on 3 vector
;; operands, we must use CMGE or CMGT and swap the order of the
;; source operands.

(define_code_attr n_optab [(lt "gt") (le "ge") (eq "eq") (ge "ge") (gt "gt")
			   (ltu "hi") (leu "hs") (geu "hs") (gtu "hi")])
(define_code_attr cmp_1   [(lt "2") (le "2") (eq "1") (ge "1") (gt "1")
			   (ltu "2") (leu "2") (geu "1") (gtu "1")])
(define_code_attr cmp_2   [(lt "1") (le "1") (eq "2") (ge "2") (gt "2")
			   (ltu "1") (leu "1") (geu "2") (gtu "2")])

(define_code_attr CMP [(lt "LT") (le "LE") (eq "EQ") (ge "GE") (gt "GT")
			   (ltu "LTU") (leu "LEU") (geu "GEU") (gtu "GTU")])

;; Optab prefix for sign/zero-extending operations
(define_code_attr su_optab [(sign_extend "") (zero_extend "u")
			    (div "") (udiv "u")
			    (fix "") (unsigned_fix "u")
			    (ss_plus "s") (us_plus "u")
			    (ss_minus "s") (us_minus "u")])

;; Similar for the instruction mnemonics
(define_code_attr shift [(ashift "lsl") (ashiftrt "asr")
			 (lshiftrt "lsr") (rotatert "ror")])

;; Map shift operators onto underlying bit-field instructions
(define_code_attr bfshift [(ashift "ubfiz") (ashiftrt "sbfx")
			   (lshiftrt "ubfx") (rotatert "extr")])

;; Logical operator instruction mnemonics
(define_code_attr logical [(and "and") (ior "orr") (xor "eor")])

;; Similar, but when not(op)
(define_code_attr nlogical [(and "bic") (ior "orn") (xor "eon")])

;; Sign- or zero-extending load
(define_code_attr ldrxt [(sign_extend "ldrs") (zero_extend "ldr")])

;; Sign- or zero-extending data-op
(define_code_attr su [(sign_extend "s") (zero_extend "u")
		      (sign_extract "s") (zero_extract "u")
		      (fix "s") (unsigned_fix "u")
		      (div "s") (udiv "u")])

;; Emit cbz/cbnz depending on comparison type.
(define_code_attr cbz [(eq "cbz") (ne "cbnz") (lt "cbnz") (ge "cbz")])

;; Emit tbz/tbnz depending on comparison type.
(define_code_attr tbz [(eq "tbz") (ne "tbnz") (lt "tbnz") (ge "tbz")])

;; Max/min attributes.
(define_code_attr maxmin [(smax "smax")
			  (smin "smin")
			  (umax "umax")
			  (umin "umin")])

;; MLA/MLS attributes.
(define_code_attr as [(ss_plus "a") (ss_minus "s")])

;; Atomic operations
(define_code_attr atomic_optab
  [(ior "or") (xor "xor") (and "and") (plus "add") (minus "sub")])

(define_code_attr atomic_op_operand
  [(ior "aarch64_logical_operand")
   (xor "aarch64_logical_operand")
   (and "aarch64_logical_operand")
   (plus "aarch64_plus_operand")
   (minus "aarch64_plus_operand")])

;; -------------------------------------------------------------------
;; Int Iterators.
;; -------------------------------------------------------------------
(define_int_iterator MAXMINV [UNSPEC_UMAXV UNSPEC_UMINV
			      UNSPEC_SMAXV UNSPEC_SMINV])

(define_int_iterator FMAXMINV [UNSPEC_FMAXV UNSPEC_FMINV])

(define_int_iterator HADDSUB [UNSPEC_SHADD UNSPEC_UHADD
			      UNSPEC_SRHADD UNSPEC_URHADD
			      UNSPEC_SHSUB UNSPEC_UHSUB
			      UNSPEC_SRHSUB UNSPEC_URHSUB])


(define_int_iterator ADDSUBHN [UNSPEC_ADDHN UNSPEC_RADDHN
			       UNSPEC_SUBHN UNSPEC_RSUBHN])

(define_int_iterator ADDSUBHN2 [UNSPEC_ADDHN2 UNSPEC_RADDHN2
			        UNSPEC_SUBHN2 UNSPEC_RSUBHN2])

(define_int_iterator FMAXMIN [UNSPEC_FMAX UNSPEC_FMIN])

(define_int_iterator VQDMULH [UNSPEC_SQDMULH UNSPEC_SQRDMULH])

(define_int_iterator USSUQADD [UNSPEC_SUQADD UNSPEC_USQADD])

(define_int_iterator SUQMOVN [UNSPEC_SQXTN UNSPEC_UQXTN])

(define_int_iterator VSHL [UNSPEC_SSHL UNSPEC_USHL
		           UNSPEC_SRSHL UNSPEC_URSHL])

(define_int_iterator VSHLL [UNSPEC_SSHLL UNSPEC_USHLL])

(define_int_iterator VQSHL [UNSPEC_SQSHL UNSPEC_UQSHL
                            UNSPEC_SQRSHL UNSPEC_UQRSHL])

(define_int_iterator VSRA [UNSPEC_SSRA UNSPEC_USRA
			     UNSPEC_SRSRA UNSPEC_URSRA])

(define_int_iterator VSLRI [UNSPEC_SSLI UNSPEC_USLI
			      UNSPEC_SSRI UNSPEC_USRI])


(define_int_iterator VRSHR_N [UNSPEC_SRSHR UNSPEC_URSHR])

(define_int_iterator VQSHL_N [UNSPEC_SQSHLU UNSPEC_SQSHL UNSPEC_UQSHL])

(define_int_iterator VQSHRN_N [UNSPEC_SQSHRUN UNSPEC_SQRSHRUN
                               UNSPEC_SQSHRN UNSPEC_UQSHRN
                               UNSPEC_SQRSHRN UNSPEC_UQRSHRN])

(define_int_iterator PERMUTE [UNSPEC_ZIP1 UNSPEC_ZIP2
			      UNSPEC_TRN1 UNSPEC_TRN2
			      UNSPEC_UZP1 UNSPEC_UZP2])

(define_int_iterator FRINT [UNSPEC_FRINTZ UNSPEC_FRINTP UNSPEC_FRINTM
			     UNSPEC_FRINTI UNSPEC_FRINTX UNSPEC_FRINTA])

(define_int_iterator FCVT [UNSPEC_FRINTZ UNSPEC_FRINTP UNSPEC_FRINTM
			    UNSPEC_FRINTA])

;; -------------------------------------------------------------------
;; Int Iterators Attributes.
;; -------------------------------------------------------------------
(define_int_attr  maxminv [(UNSPEC_UMAXV "umax")
			   (UNSPEC_UMINV "umin")
			   (UNSPEC_SMAXV "smax")
			   (UNSPEC_SMINV "smin")])

(define_int_attr  fmaxminv [(UNSPEC_FMAXV "max")
			    (UNSPEC_FMINV "min")])

(define_int_attr  fmaxmin [(UNSPEC_FMAX "fmax")
			   (UNSPEC_FMIN "fmin")])

(define_int_attr sur [(UNSPEC_SHADD "s") (UNSPEC_UHADD "u")
		      (UNSPEC_SRHADD "sr") (UNSPEC_URHADD "ur")
		      (UNSPEC_SHSUB "s") (UNSPEC_UHSUB "u")
		      (UNSPEC_SRHSUB "sr") (UNSPEC_URHSUB "ur")
		      (UNSPEC_ADDHN "") (UNSPEC_RADDHN "r")
		      (UNSPEC_SUBHN "") (UNSPEC_RSUBHN "r")
		      (UNSPEC_ADDHN2 "") (UNSPEC_RADDHN2 "r")
		      (UNSPEC_SUBHN2 "") (UNSPEC_RSUBHN2 "r")
		      (UNSPEC_SQXTN "s") (UNSPEC_UQXTN "u")
		      (UNSPEC_USQADD "us") (UNSPEC_SUQADD "su")
		      (UNSPEC_SSLI  "s") (UNSPEC_USLI  "u")
		      (UNSPEC_SSRI  "s") (UNSPEC_USRI  "u")
		      (UNSPEC_USRA  "u") (UNSPEC_SSRA  "s")
		      (UNSPEC_URSRA  "ur") (UNSPEC_SRSRA  "sr")
		      (UNSPEC_URSHR  "ur") (UNSPEC_SRSHR  "sr")
		      (UNSPEC_SQSHLU "s") (UNSPEC_SQSHL   "s")
		      (UNSPEC_UQSHL  "u")
		      (UNSPEC_SQSHRUN "s") (UNSPEC_SQRSHRUN "s")
                      (UNSPEC_SQSHRN "s")  (UNSPEC_UQSHRN "u")
                      (UNSPEC_SQRSHRN "s") (UNSPEC_UQRSHRN "u")
		      (UNSPEC_USHL  "u")   (UNSPEC_SSHL  "s")
		      (UNSPEC_USHLL  "u")  (UNSPEC_SSHLL "s")
		      (UNSPEC_URSHL  "ur") (UNSPEC_SRSHL  "sr")
		      (UNSPEC_UQRSHL  "u") (UNSPEC_SQRSHL  "s")
])

(define_int_attr r [(UNSPEC_SQDMULH "") (UNSPEC_SQRDMULH "r")
		    (UNSPEC_SQSHRUN "") (UNSPEC_SQRSHRUN "r")
                    (UNSPEC_SQSHRN "")  (UNSPEC_UQSHRN "")
                    (UNSPEC_SQRSHRN "r") (UNSPEC_UQRSHRN "r")
                    (UNSPEC_SQSHL   "")  (UNSPEC_UQSHL  "")
                    (UNSPEC_SQRSHL   "r")(UNSPEC_UQRSHL  "r")
])

(define_int_attr lr [(UNSPEC_SSLI  "l") (UNSPEC_USLI  "l")
		     (UNSPEC_SSRI  "r") (UNSPEC_USRI  "r")])

(define_int_attr u [(UNSPEC_SQSHLU "u") (UNSPEC_SQSHL "") (UNSPEC_UQSHL "")
		    (UNSPEC_SQSHRUN "u") (UNSPEC_SQRSHRUN "u")
                    (UNSPEC_SQSHRN "")  (UNSPEC_UQSHRN "")
                    (UNSPEC_SQRSHRN "") (UNSPEC_UQRSHRN "")])

(define_int_attr addsub [(UNSPEC_SHADD "add")
			 (UNSPEC_UHADD "add")
			 (UNSPEC_SRHADD "add")
			 (UNSPEC_URHADD "add")
			 (UNSPEC_SHSUB "sub")
			 (UNSPEC_UHSUB "sub")
			 (UNSPEC_SRHSUB "sub")
			 (UNSPEC_URHSUB "sub")
			 (UNSPEC_ADDHN "add")
			 (UNSPEC_SUBHN "sub")
			 (UNSPEC_RADDHN "add")
			 (UNSPEC_RSUBHN "sub")
			 (UNSPEC_ADDHN2 "add")
			 (UNSPEC_SUBHN2 "sub")
			 (UNSPEC_RADDHN2 "add")
			 (UNSPEC_RSUBHN2 "sub")])

(define_int_attr offsetlr [(UNSPEC_SSLI	"1") (UNSPEC_USLI "1")
			   (UNSPEC_SSRI	"0") (UNSPEC_USRI "0")])

;; Standard pattern names for floating-point rounding instructions.
(define_int_attr frint_pattern [(UNSPEC_FRINTZ "btrunc")
				(UNSPEC_FRINTP "ceil")
				(UNSPEC_FRINTM "floor")
				(UNSPEC_FRINTI "nearbyint")
				(UNSPEC_FRINTX "rint")
				(UNSPEC_FRINTA "round")])

;; frint suffix for floating-point rounding instructions.
(define_int_attr frint_suffix [(UNSPEC_FRINTZ "z") (UNSPEC_FRINTP "p")
			       (UNSPEC_FRINTM "m") (UNSPEC_FRINTI "i")
			       (UNSPEC_FRINTX "x") (UNSPEC_FRINTA "a")])

(define_int_attr fcvt_pattern [(UNSPEC_FRINTZ "btrunc") (UNSPEC_FRINTA "round")
			       (UNSPEC_FRINTP "ceil") (UNSPEC_FRINTM "floor")])

(define_int_attr perm_insn [(UNSPEC_ZIP1 "zip") (UNSPEC_ZIP2 "zip")
			    (UNSPEC_TRN1 "trn") (UNSPEC_TRN2 "trn")
			    (UNSPEC_UZP1 "uzp") (UNSPEC_UZP2 "uzp")])

(define_int_attr perm_hilo [(UNSPEC_ZIP1 "1") (UNSPEC_ZIP2 "2")
			    (UNSPEC_TRN1 "1") (UNSPEC_TRN2 "2")
			    (UNSPEC_UZP1 "1") (UNSPEC_UZP2 "2")])
