gcc/config/epiphany/constraints.md

;; 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/.

;; Integer constraints

(define_constraint “U16” “An unsigned 16-bit constant.” (ior (and (match_code “const_int”) (match_test “IMM16 (ival)”)) (and (match_code “symbol_ref,label_ref,const”) (match_test “epiphany_small16 (op)”))))

(define_constraint “K” “An unsigned 5-bit constant.” (and (match_code “const_int”) (match_test “IMM5 (ival)”)))

;; This could also accept symbol_ref, label_ref or const if we introduce ;; a small area and/or attribute that satisfies the 11-bit signed range. (define_constraint “L” “A signed 11-bit constant.” (and (match_code “const_int”) (match_test “SIMM11 (ival)”)))

(define_constraint “CnL” “A negated signed 11-bit constant.” (and (match_code “const_int”) (match_test “SIMM11 (-ival)”)))

(define_constraint “Cm1” “A signed 11-bit constant added to -1” (and (match_code “const_int”) (match_test “SIMM11 (ival+1)”) (match_test “epiphany_m1reg >= 0”)))

(define_constraint “Cl1” “Left-shift of -1” (and (match_code “const_int”) (match_test “ival == (ival | ~(ival-1))”) (match_test “epiphany_m1reg >= 0”)))

(define_constraint “Cr1” “Right-shift of -1” (and (match_code “const_int”) (match_test “ival == (ival & ~(ival+1))”) (match_test “epiphany_m1reg >= 0”)))

(define_constraint “Cal” “Constant for arithmetic/logical operations” (match_test “(flag_pic ? nonsymbolic_immediate_operand (op, VOIDmode) : immediate_operand (op, VOIDmode))”))

(define_constraint “Csy” “Symbolic constant for call/jump instruction” (match_test “symbolic_operand (op, VOIDmode)”))

;; Register constraints ;; proper register constraints define a register class and can thus ;; drive register allocation and reload. OTOH sometimes we want to ;; avoid just that.

;; The register class usable in short insns. ;; Subject to TARGET_PREFER_SHORT_INSN_REGS. (define_register_constraint “Rcs” “SHORT_INSN_REGS” “short insn register class.”)

; The registers that can be used to hold a sibcall call address. ; This must not conflict with any callee-saved registers. (define_register_constraint “Rsc” “SIBCALL_REGS” “sibcall register class”)

; The registers that can be used to hold a status value (define_register_constraint “Rct” “CORE_CONTROL_REGS” “Core control register class”)

;; The register group usable in short insns. (define_constraint “Rgs” “short insn register group.” (and (match_code “reg”) (match_test “REGNO (op) >= FIRST_PSEUDO_REGISTER || REGNO (op) <= 7”)))

;; Constant suitable for the addsi3_r pattern. (define_constraint “Car” “addsi3_r constant.” (and (match_code “const_int”) (ior (match_test “RTX_OK_FOR_OFFSET_P (SImode, op)”) (match_test “RTX_OK_FOR_OFFSET_P (HImode, op)”) (match_test “RTX_OK_FOR_OFFSET_P (QImode, op)”))))

;; The return address if it can be replaced with GPR_LR. (define_constraint “Rra” “return address constraint - register variant” (and (match_code “unspec”) (match_test “XINT (op, 1) == UNSPEC_RETURN_ADDR”) (match_test “!MACHINE_FUNCTION (cfun)->lr_clobbered”)))

(define_constraint “Rcc” “integer condition code” (and (match_code “reg”) (match_test “REGNO (op) == CC_REGNUM”)))

;; The return address, which might be a stack slot. */ (define_constraint “Sra” “return address constraint - memory variant” (and (match_code “unspec”) (match_test “XINT (op, 1) == UNSPEC_RETURN_ADDR”)))

(define_constraint “Cfm” “control register values to switch fp mode” (and (match_code “const”) (match_test “GET_CODE (XEXP (op, 0)) == UNSPEC”) (match_test “XINT (XEXP (op, 0), 1) == UNSPEC_FP_MODE”)))