gcc/config/avr/constraints.md

;; Constraint definitions for ATMEL AVR micro controllers. ;; Copyright (C) 2006-2021 Free Software Foundation, Inc. ;; ;; 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/.

;; Register constraints

(define_register_constraint “t” “R0_REG” “Temporary register r0”)

(define_register_constraint “b” “BASE_POINTER_REGS” “Base pointer registers (r28--r31)”)

(define_register_constraint “e” “POINTER_REGS” “Pointer registers (r26--r31)”)

(define_register_constraint “w” “ADDW_REGS” “Registers from r24 to r31. These registers can be used in @samp{adiw} command.”)

(define_register_constraint “d” “LD_REGS” “Registers from r16 to r31.”)

(define_register_constraint “l” “NO_LD_REGS” “Registers from r0 to r15.”)

(define_register_constraint “a” “SIMPLE_LD_REGS” “Registers from r16 to r23.”)

(define_register_constraint “x” “POINTER_X_REGS” “Register pair X (r27:r26).”)

(define_register_constraint “y” “POINTER_Y_REGS” “Register pair Y (r29:r28).”)

(define_register_constraint “z” “POINTER_Z_REGS” “Register pair Z (r31:r30).”)

(define_register_constraint “q” “STACK_REG” “Stack pointer register (SPH:SPL).”)

(define_constraint “I” “Integer constant in the range 0 @dots{} 63.” (and (match_code “const_int”) (match_test “ival >= 0 && ival <= 63”)))

(define_constraint “J” “Integer constant in the range -63 @dots{} 0.” (and (match_code “const_int”) (match_test “ival <= 0 && ival >= -63”)))

(define_constraint “K” “Integer constant 2.” (and (match_code “const_int”) (match_test “ival == 2”)))

(define_constraint “L” “Zero.” (and (match_code “const_int”) (match_test “ival == 0”)))

(define_constraint “M” “Integer constant in the range 0 @dots{} 0xff.” (and (match_code “const_int”) (match_test “ival >= 0 && ival <= 0xff”)))

(define_constraint “N” “Constant integer @minus{}1.” (and (match_code “const_int”) (match_test “ival == -1”)))

(define_constraint “O” “Constant integer 8, 16, or 24.” (and (match_code “const_int”) (match_test “ival == 8 || ival == 16 || ival == 24”)))

(define_constraint “P” “Constant integer 1.” (and (match_code “const_int”) (match_test “ival == 1”)))

(define_constraint “G” “Constant float 0.” (and (match_code “const_double”) (match_test “op == CONST0_RTX (SFmode)”)))

(define_memory_constraint “Q” “A memory address based on Y or Z pointer with displacement.” (and (match_code “mem”) (match_test “extra_constraint_Q (op)”)))

(define_constraint “Cm2” “Constant integer @minus{}2.” (and (match_code “const_int”) (match_test “ival == -2”)))

(define_constraint “C03” “Constant integer 3.” (and (match_code “const_int”) (match_test “ival == 3”)))

(define_constraint “C04” “Constant integer 4.” (and (match_code “const_int”) (match_test “ival == 4”)))

(define_constraint “C05” “Constant integer 5.” (and (match_code “const_int”) (match_test “ival == 5”)))

(define_constraint “C06” “Constant integer 6.” (and (match_code “const_int”) (match_test “ival == 6”)))

(define_constraint “C07” “Constant integer 7.” (and (match_code “const_int”) (match_test “ival == 7”)))

(define_constraint “Ca1” “Constant 1-byte integer that allows AND by means of CLT + BLD.” (and (match_code “const_int”) (match_test “avr_popcount_each_byte (op, 1, 1<<7)”)))

(define_constraint “Ca2” “Constant 2-byte integer that allows AND without clobber register.” (and (match_code “const_int”) (match_test “avr_popcount_each_byte (op, 2, (1<<0) | (1<<7) | (1<<8))”)))

(define_constraint “Ca3” “Constant 3-byte integer that allows AND without clobber register.” (and (match_code “const_int”) (match_test “avr_popcount_each_byte (op, 3, (1<<0) | (1<<7) | (1<<8))”)))

(define_constraint “Ca4” “Constant 4-byte integer that allows AND without clobber register.” (and (match_code “const_int”) (match_test “avr_popcount_each_byte (op, 4, (1<<0) | (1<<7) | (1<<8))”)))

(define_constraint “Co1” “Constant 1-byte integer that allows AND by means of SET + BLD.” (and (match_code “const_int”) (match_test “avr_popcount_each_byte (op, 1, 1<<1)”)))

(define_constraint “Co2” “Constant 2-byte integer that allows OR without clobber register.” (and (match_code “const_int”) (match_test “avr_popcount_each_byte (op, 2, (1<<0) | (1<<1) | (1<<8))”)))

(define_constraint “Co3” “Constant 3-byte integer that allows OR without clobber register.” (and (match_code “const_int”) (match_test “avr_popcount_each_byte (op, 3, (1<<0) | (1<<1) | (1<<8))”)))

(define_constraint “Co4” “Constant 4-byte integer that allows OR without clobber register.” (and (match_code “const_int”) (match_test “avr_popcount_each_byte (op, 4, (1<<0) | (1<<1) | (1<<8))”)))

(define_constraint “Cx2” “Constant 2-byte integer that allows XOR without clobber register.” (and (match_code “const_int”) (match_test “avr_popcount_each_byte (op, 2, (1<<0) | (1<<8))”)))

(define_constraint “Cx3” “Constant 3-byte integer that allows XOR without clobber register.” (and (match_code “const_int”) (match_test “avr_popcount_each_byte (op, 3, (1<<0) | (1<<8))”)))

(define_constraint “Cx4” “Constant 4-byte integer that allows XOR without clobber register.” (and (match_code “const_int”) (match_test “avr_popcount_each_byte (op, 4, (1<<0) | (1<<8))”)))

(define_constraint “Csp” “Integer constant in the range -11 @dots{} 6.” (and (match_code “const_int”) (match_test “IN_RANGE (ival, -11, 6)”)))

(define_constraint “Cxf” “32-bit integer constant where at least one nibble is 0xf.” (and (match_code “const_int”) (match_test “avr_has_nibble_0xf (op)”)))

(define_constraint “C0f” “32-bit integer constant where no nibble equals 0xf.” (and (match_code “const_int”) (match_test “!avr_has_nibble_0xf (op)”)))

(define_constraint “Cn8” “A negative constant integer in the range @minus{}255 @dots{} @minus{}1.” (and (match_code “const_int”) (match_test “IN_RANGE (ival, -255, -1)”)))

;; CONST_FIXED is no element of ‘n’ so cook our own. ;; “i” or “s” would match but because the insn uses iterators that cover ;; INT_MODE, “i” or “s” is not always possible.

(define_constraint “Ynn” “Fixed-point constant known at compile time.” (match_code “const_fixed”))

(define_constraint “Y00” “Fixed-point or integer constant with bit representation 0x0” (and (match_code “const_fixed,const_int”) (match_test “op == CONST0_RTX (GET_MODE (op))”)))

(define_constraint “Y01” “Fixed-point or integer constant with bit representation 0x1” (ior (and (match_code “const_fixed”) (match_test “INTVAL (avr_to_int_mode (op)) == 1”)) (match_test “satisfies_constraint_P (op)”)))

(define_constraint “Ym1” “Fixed-point or integer constant with bit representation -0x1” (ior (and (match_code “const_fixed”) (match_test “INTVAL (avr_to_int_mode (op)) == -1”)) (match_test “satisfies_constraint_N (op)”)))

(define_constraint “Y02” “Fixed-point or integer constant with bit representation 0x2” (ior (and (match_code “const_fixed”) (match_test “INTVAL (avr_to_int_mode (op)) == 2”)) (match_test “satisfies_constraint_K (op)”)))

(define_constraint “Ym2” “Fixed-point or integer constant with bit representation -0x2” (ior (and (match_code “const_fixed”) (match_test “INTVAL (avr_to_int_mode (op)) == -2”)) (match_test “satisfies_constraint_Cm2 (op)”)))

(define_constraint “Yx2” “Fixed-point or integer constant not in the range @minus{}2 @dots{} 2” (and (ior (match_code “const_int”) (match_code “const_fixed”)) (match_test “!IN_RANGE (INTVAL (avr_to_int_mode (op)), -2, 2)”)))

;; Similar to “IJ” used with ADIW/SBIW, but for CONST_FIXED.

(define_constraint “YIJ” “Fixed-point constant from @minus{}0x003f to 0x003f.” (and (match_code “const_fixed”) (match_test “IN_RANGE (INTVAL (avr_to_int_mode (op)), -63, 63)”)))