;; Machine description for AArch64 architecture. ;; Copyright (C) 2009-2021 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/.

(define_register_constraint “k” “STACK_REG” “@internal The stack register.”)

(define_register_constraint “Ucs” “TAILCALL_ADDR_REGS” “@internal Registers suitable for an indirect tail call”)

(define_register_constraint “Ucr” “aarch64_harden_sls_blr_p () ? STUB_REGS : GENERAL_REGS” “@internal Registers to be used for an indirect call. This is usually the general registers, but when we are hardening against Straight Line Speculation we disallow x16, x17, and x30 so we can use indirection stubs. These indirection stubs cannot use the above registers since they will be reached by a BL that may have to go through a linker veneer.”)

(define_register_constraint “w” “FP_REGS” “Floating point and SIMD vector registers.”)

(define_register_constraint “Upa” “PR_REGS” “SVE predicate registers p0 - p15.”)

(define_register_constraint “Upl” “PR_LO_REGS” “SVE predicate registers p0 - p7.”)

(define_register_constraint “x” “FP_LO_REGS” “Floating point and SIMD vector registers V0 - V15.”)

(define_register_constraint “y” “FP_LO8_REGS” “Floating point and SIMD vector registers V0 - V7.”)

(define_constraint “c” “@internal The condition code register.” (match_operand 0 “cc_register”))

(define_constraint “I” “A constant that can be used with an ADD operation.” (and (match_code “const_int”) (match_test “aarch64_uimm12_shift (ival)”)))

(define_constraint “Uaa” “@internal A constant that matches two uses of add instructions.” (and (match_code “const_int”) (match_test “aarch64_pluslong_strict_immedate (op, VOIDmode)”)))

(define_constraint “Uai” “@internal A constraint that matches a VG-based constant that can be added by a single INC or DEC.” (match_operand 0 “aarch64_sve_scalar_inc_dec_immediate”))

(define_constraint “Uav” “@internal A constraint that matches a VG-based constant that can be added by a single ADDVL or ADDPL.” (match_operand 0 “aarch64_sve_addvl_addpl_immediate”))

(define_constraint “Uat” “@internal A constraint that matches a VG-based constant that can be added by using multiple instructions, with one temporary register.” (match_operand 0 “aarch64_split_add_offset_immediate”))

(define_constraint “J” “A constant that can be used with a SUB operation (once negated).” (and (match_code “const_int”) (match_test “aarch64_uimm12_shift (-ival)”)))

;; We can't use the mode of a CONST_INT to determine the context in ;; which it is being used, so we must have a separate constraint for ;; each context.

(define_constraint “K” “A constant that can be used with a 32-bit logical operation.” (and (match_code “const_int”) (match_test “aarch64_bitmask_imm (ival, SImode)”)))

(define_constraint “L” “A constant that can be used with a 64-bit logical operation.” (and (match_code “const_int”) (match_test “aarch64_bitmask_imm (ival, DImode)”)))

(define_constraint “M” “A constant that can be used with a 32-bit MOV immediate operation.” (and (match_code “const_int”) (match_test “aarch64_move_imm (ival, SImode)”)))

(define_constraint “N” “A constant that can be used with a 64-bit MOV immediate operation.” (and (match_code “const_int”) (match_test “aarch64_move_imm (ival, DImode)”)))

(define_constraint “Uti” “A constant that can be used with a 128-bit MOV immediate operation.” (and (ior (match_code “const_int”) (match_code “const_wide_int”)) (match_test “aarch64_mov128_immediate (op)”)))

(define_constraint “UsO” “A constant that can be used with a 32-bit and operation.” (and (match_code “const_int”) (match_test “aarch64_and_bitmask_imm (ival, SImode)”)))

(define_constraint “UsP” “A constant that can be used with a 64-bit and operation.” (and (match_code “const_int”) (match_test “aarch64_and_bitmask_imm (ival, DImode)”)))

(define_constraint “S” “A constraint that matches an absolute symbolic address.” (and (match_code “const,symbol_ref,label_ref”) (match_test “aarch64_symbolic_address_p (op)”)))

(define_constraint “Y” “Floating point constant zero.” (and (match_code “const_double”) (match_test “aarch64_float_const_zero_rtx_p (op)”)))

(define_constraint “Z” “Integer or floating-point constant zero.” (match_test “op == CONST0_RTX (GET_MODE (op))”))

(define_constraint “Ush” “A constraint that matches an absolute symbolic address high part.” (and (match_code “high”) (match_test “aarch64_valid_symref (XEXP (op, 0), GET_MODE (XEXP (op, 0)))”)))

(define_constraint “Usa” “@internal A constraint that matches an absolute symbolic address that can be loaded by a single ADR.” (and (match_code “const,symbol_ref,label_ref”) (match_test “aarch64_symbolic_address_p (op)”) (match_test “aarch64_mov_operand_p (op, GET_MODE (op))”)))

(define_constraint “Uss” “@internal A constraint that matches an immediate shift constant in SImode.” (and (match_code “const_int”) (match_test “(unsigned HOST_WIDE_INT) ival < 32”)))

(define_constraint “Usn” “A constant that can be used with a CCMN operation (once negated).” (and (match_code “const_int”) (match_test “IN_RANGE (ival, -31, 0)”)))

(define_constraint “Usd” “@internal A constraint that matches an immediate shift constant in DImode.” (and (match_code “const_int”) (match_test “(unsigned HOST_WIDE_INT) ival < 64”)))

(define_constraint “Usf” “@internal Usf is a symbol reference under the context where plt stub allowed.” (and (match_code “symbol_ref”) (match_test “!(aarch64_is_noplt_call_p (op) || aarch64_is_long_call_p (op))”)))

(define_constraint “Usg” “@internal A constraint that matches an immediate right shift constant in SImode suitable for a SISD instruction.” (and (match_code “const_int”) (match_test “IN_RANGE (ival, 1, 31)”)))

(define_constraint “Usj” “@internal A constraint that matches an immediate right shift constant in DImode suitable for a SISD instruction.” (and (match_code “const_int”) (match_test “IN_RANGE (ival, 1, 63)”)))

(define_constraint “UsM” “@internal A constraint that matches the immediate constant -1.” (match_test “op == constm1_rtx”))

(define_constraint “Ulc” “@internal A constraint that matches a constant integer whose bits are consecutive ones from the MSB.” (and (match_code “const_int”) (match_test “aarch64_high_bits_all_ones_p (ival)”)))

(define_constraint “Usv” “@internal A constraint that matches a VG-based constant that can be loaded by a single CNT[BHWD].” (match_operand 0 “aarch64_sve_cnt_immediate”))

(define_constraint “Usi” “@internal A constraint that matches an immediate operand valid for the SVE INDEX instruction.” (match_operand 0 “aarch64_sve_index_immediate”))

(define_constraint “Ui1” “@internal A constraint that matches the immediate constant +1.” (match_test “op == const1_rtx”))

(define_constraint “Ui2” “@internal A constraint that matches the integers 0...3.” (and (match_code “const_int”) (match_test “(unsigned HOST_WIDE_INT) ival <= 3”)))

(define_constraint “Ui3” “@internal A constraint that matches the integers 0...4.” (and (match_code “const_int”) (match_test “(unsigned HOST_WIDE_INT) ival <= 4”)))

(define_constraint “Ui7” “@internal A constraint that matches the integers 0...7.” (and (match_code “const_int”) (match_test “(unsigned HOST_WIDE_INT) ival <= 7”)))

(define_constraint “Up3” “@internal A constraint that matches the integers 2^(0...4).” (and (match_code “const_int”) (match_test “(unsigned) exact_log2 (ival) <= 4”)))

(define_constraint “Uph” “@internal A constraint that matches HImode integers zero extendable to SImode plus_operand.” (and (match_code “const_int”) (match_test “aarch64_plushi_immediate (op, VOIDmode)”)))

(define_memory_constraint “Q” “A memory address which uses a single base register with no offset.” (and (match_code “mem”) (match_test “REG_P (XEXP (op, 0))”)))

(define_memory_constraint “Ust” “@internal A memory address with 9bit unscaled offset.” (match_operand 0 “aarch64_9bit_offset_memory_operand”))

(define_memory_constraint “Ump” “@internal A memory address suitable for a load/store pair operation.” (and (match_code “mem”) (match_test “aarch64_legitimate_address_p (GET_MODE (op), XEXP (op, 0), true, ADDR_QUERY_LDP_STP)”)))

;; Used for storing or loading pairs in an AdvSIMD register using an STP/LDP ;; as a vector-concat. The address mode uses the same constraints as if it ;; were for a single value. (define_memory_constraint “Umn” “@internal A memory address suitable for a load/store pair operation.” (and (match_code “mem”) (match_test “aarch64_legitimate_address_p (GET_MODE (op), XEXP (op, 0), true, ADDR_QUERY_LDP_STP_N)”)))

(define_address_constraint “UPb” “@internal An address valid for SVE PRFB instructions.” (match_test “aarch64_sve_prefetch_operand_p (op, VNx16QImode)”))

(define_address_constraint “UPd” “@internal An address valid for SVE PRFD instructions.” (match_test “aarch64_sve_prefetch_operand_p (op, VNx2DImode)”))

(define_address_constraint “UPh” “@internal An address valid for SVE PRFH instructions.” (match_test “aarch64_sve_prefetch_operand_p (op, VNx8HImode)”))

(define_address_constraint “UPw” “@internal An address valid for SVE PRFW instructions.” (match_test “aarch64_sve_prefetch_operand_p (op, VNx4SImode)”))

(define_memory_constraint “Utf” “@internal An address valid for SVE LDFF1 instructions.” (and (match_code “mem”) (match_test “aarch64_sve_ldff1_operand_p (op)”)))

(define_memory_constraint “Utn” “@internal An address valid for SVE LDNF1 instructions.” (and (match_code “mem”) (match_test “aarch64_sve_ldnf1_operand_p (op)”)))

(define_memory_constraint “Utr” “@internal An address valid for SVE LDR and STR instructions (as distinct from LD[1234] and ST[1234] patterns).” (and (match_code “mem”) (match_test “aarch64_sve_ldr_operand_p (op)”)))

(define_memory_constraint “Utv” “@internal An address valid for loading/storing opaque structure types wider than TImode.” (and (match_code “mem”) (match_test “aarch64_simd_mem_operand_p (op)”)))

(define_relaxed_memory_constraint “Utq” “@internal An address valid for loading or storing a 128-bit AdvSIMD register” (and (match_code “mem”) (match_test “aarch64_legitimate_address_p (GET_MODE (op), XEXP (op, 0), 1)”) (match_test “aarch64_legitimate_address_p (V2DImode, XEXP (op, 0), 1)”)))

(define_relaxed_memory_constraint “UtQ” “@internal An address valid for SVE LD1RQs.” (and (match_code “mem”) (match_test “aarch64_sve_ld1rq_operand_p (op)”)))

(define_relaxed_memory_constraint “UOb” “@internal An address valid for SVE LD1ROH.” (and (match_code “mem”) (match_test “aarch64_sve_ld1ro_operand_p (op, QImode)”)))

(define_relaxed_memory_constraint “UOh” “@internal An address valid for SVE LD1ROH.” (and (match_code “mem”) (match_test “aarch64_sve_ld1ro_operand_p (op, HImode)”)))

(define_relaxed_memory_constraint “UOw” “@internal An address valid for SVE LD1ROW.” (and (match_code “mem”) (match_test “aarch64_sve_ld1ro_operand_p (op, SImode)”)))

(define_relaxed_memory_constraint “UOd” “@internal An address valid for SVE LD1ROD.” (and (match_code “mem”) (match_test “aarch64_sve_ld1ro_operand_p (op, DImode)”)))

(define_relaxed_memory_constraint “Uty” “@internal An address valid for SVE LD1Rs.” (and (match_code “mem”) (match_test “aarch64_sve_ld1r_operand_p (op)”)))

(define_memory_constraint “Utx” “@internal An address valid for SVE structure mov patterns (as distinct from LD[234] and ST[234] patterns).” (match_operand 0 “aarch64_sve_struct_memory_operand”))

(define_constraint “Ufc” “A floating point constant which can be used with an
FMOV immediate operation.” (and (match_code “const_double,const_vector”) (match_test “aarch64_float_const_representable_p (op)”)))

(define_constraint “Uvi” “A floating point constant which can be used with a
MOVI immediate operation.” (and (match_code “const_double”) (match_test “aarch64_can_const_movi_rtx_p (op, GET_MODE (op))”)))

(define_constraint “Do” “@internal A constraint that matches vector of immediates for orr.” (and (match_code “const_vector”) (match_test “aarch64_simd_valid_immediate (op, NULL, AARCH64_CHECK_ORR)”)))

(define_constraint “Db” “@internal A constraint that matches vector of immediates for bic.” (and (match_code “const_vector”) (match_test “aarch64_simd_valid_immediate (op, NULL, AARCH64_CHECK_BIC)”)))

(define_constraint “Dn” “@internal A constraint that matches vector of immediates.” (and (match_code “const,const_vector”) (match_test “aarch64_simd_valid_immediate (op, NULL)”)))

(define_constraint “Dh” “@internal A constraint that matches an immediate operand valid for
AdvSIMD scalar move in HImode.” (and (match_code “const_int”) (match_test “aarch64_simd_scalar_immediate_valid_for_move (op, HImode)”)))

(define_constraint “Dq” “@internal A constraint that matches an immediate operand valid for
AdvSIMD scalar move in QImode.” (and (match_code “const_int”) (match_test “aarch64_simd_scalar_immediate_valid_for_move (op, QImode)”)))

(define_constraint “Dt” “@internal A const_double which is the reciprocal of an exact power of two, can be used in an scvtf with fract bits operation” (and (match_code “const_double”) (match_test “aarch64_fpconst_pow2_recip (op) > 0”)))

(define_constraint “Dl” “@internal A constraint that matches vector of immediates for left shifts.” (and (match_code “const,const_vector”) (match_test “aarch64_simd_shift_imm_p (op, GET_MODE (op), true)”)))

(define_constraint “D1” “@internal A constraint that matches vector of immediates that is bits(mode)-1.” (and (match_code “const,const_vector”) (match_test “aarch64_const_vec_all_same_in_range_p (op, GET_MODE_UNIT_BITSIZE (mode) - 1, GET_MODE_UNIT_BITSIZE (mode) - 1)”)))

(define_constraint “Dr” “@internal A constraint that matches vector of immediates for right shifts.” (and (match_code “const,const_vector”) (match_test “aarch64_simd_shift_imm_p (op, GET_MODE (op), false)”))) (define_constraint “Dz” “@internal A constraint that matches a vector of immediate zero.” (and (match_code “const,const_vector”) (match_test “op == CONST0_RTX (GET_MODE (op))”)))

(define_constraint “Dm” “@internal A constraint that matches a vector of immediate minus one.” (and (match_code “const,const_vector”) (match_test “op == CONST1_RTX (GET_MODE (op))”)))

(define_constraint “Dd” “@internal A constraint that matches an integer immediate operand valid
for AdvSIMD scalar operations in DImode.” (and (match_code “const_int”) (match_test “aarch64_can_const_movi_rtx_p (op, DImode)”)))

(define_constraint “Ds” “@internal A constraint that matches an integer immediate operand valid
for AdvSIMD scalar operations in SImode.” (and (match_code “const_int”) (match_test “aarch64_can_const_movi_rtx_p (op, SImode)”)))

(define_address_constraint “Dp” “@internal An address valid for a prefetch instruction.” (match_test “aarch64_address_valid_for_prefetch_p (op, true)”))

(define_constraint “vgb” “@internal A constraint that matches an immediate offset valid for SVE LD1B gather instructions.” (match_operand 0 “aarch64_sve_gather_immediate_b”))

(define_constraint “vgd” “@internal A constraint that matches an immediate offset valid for SVE LD1D gather instructions.” (match_operand 0 “aarch64_sve_gather_immediate_d”))

(define_constraint “vgh” “@internal A constraint that matches an immediate offset valid for SVE LD1H gather instructions.” (match_operand 0 “aarch64_sve_gather_immediate_h”))

(define_constraint “vgw” “@internal A constraint that matches an immediate offset valid for SVE LD1W gather instructions.” (match_operand 0 “aarch64_sve_gather_immediate_w”))

(define_constraint “vsa” “@internal A constraint that matches an immediate operand valid for SVE arithmetic instructions.” (match_operand 0 “aarch64_sve_arith_immediate”))

(define_constraint “vsb” “@internal A constraint that matches an immediate operand valid for SVE UMAX and UMIN operations.” (match_operand 0 “aarch64_sve_vsb_immediate”))

(define_constraint “vsc” “@internal A constraint that matches a signed immediate operand valid for SVE CMP instructions.” (match_operand 0 “aarch64_sve_cmp_vsc_immediate”))

(define_constraint “vss” “@internal A constraint that matches a signed immediate operand valid for SVE DUP instructions.” (match_test “aarch64_sve_dup_immediate_p (op)”))

(define_constraint “vsd” “@internal A constraint that matches an unsigned immediate operand valid for SVE CMP instructions.” (match_operand 0 “aarch64_sve_cmp_vsd_immediate”))

(define_constraint “vsi” “@internal A constraint that matches a vector count operand valid for SVE INC and DEC instructions.” (match_operand 0 “aarch64_sve_vector_inc_dec_immediate”))

(define_constraint “vsn” “@internal A constraint that matches an immediate operand whose negative is valid for SVE SUB instructions.” (match_operand 0 “aarch64_sve_sub_arith_immediate”))

(define_constraint “vsQ” “@internal Like vsa, but additionally check that the immediate is nonnegative when interpreted as a signed value.” (match_operand 0 “aarch64_sve_qadd_immediate”))

(define_constraint “vsS” “@internal Like vsn, but additionally check that the immediate is negative when interpreted as a signed value.” (match_operand 0 “aarch64_sve_qsub_immediate”))

(define_constraint “vsl” “@internal A constraint that matches an immediate operand valid for SVE logical operations.” (match_operand 0 “aarch64_sve_logical_immediate”))

(define_constraint “vsm” “@internal A constraint that matches an immediate operand valid for SVE MUL, SMAX and SMIN operations.” (match_operand 0 “aarch64_sve_vsm_immediate”))

(define_constraint “vsA” “@internal A constraint that matches an immediate operand valid for SVE FADD and FSUB operations.” (match_operand 0 “aarch64_sve_float_arith_immediate”))

;; “B” for “bound”. (define_constraint “vsB” “@internal A constraint that matches an immediate operand valid for SVE FMAX and FMIN operations.” (match_operand 0 “aarch64_sve_float_maxmin_immediate”))

(define_constraint “vsM” “@internal A constraint that matches an immediate operand valid for SVE FMUL operations.” (match_operand 0 “aarch64_sve_float_mul_immediate”))

(define_constraint “vsN” “@internal A constraint that matches the negative of vsA” (match_operand 0 “aarch64_sve_float_negated_arith_immediate”))