neon-ls.decode (2022B)
1 # AArch32 Neon load/store instruction descriptions 2 # 3 # Copyright (c) 2020 Linaro, Ltd 4 # 5 # This library is free software; you can redistribute it and/or 6 # modify it under the terms of the GNU Lesser General Public 7 # License as published by the Free Software Foundation; either 8 # version 2.1 of the License, or (at your option) any later version. 9 # 10 # This library is distributed in the hope that it will be useful, 11 # but WITHOUT ANY WARRANTY; without even the implied warranty of 12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 # Lesser General Public License for more details. 14 # 15 # You should have received a copy of the GNU Lesser General Public 16 # License along with this library; if not, see <http://www.gnu.org/licenses/>. 17 18 # 19 # This file is processed by scripts/decodetree.py 20 # 21 22 # Encodings for Neon load/store instructions where the T32 encoding 23 # is a simple transformation of the A32 encoding. 24 # More specifically, this file covers instructions where the A32 encoding is 25 # 0b1111_0100_xxx0_xxxx_xxxx_xxxx_xxxx_xxxx 26 # and the T32 encoding is 27 # 0b1111_1001_xxx0_xxxx_xxxx_xxxx_xxxx_xxxx 28 # This file works on the A32 encoding only; calling code for T32 has to 29 # transform the insn into the A32 version first. 30 31 %vd_dp 22:1 12:4 32 33 # Neon load/store multiple structures 34 35 VLDST_multiple 1111 0100 0 . l:1 0 rn:4 .... itype:4 size:2 align:2 rm:4 \ 36 vd=%vd_dp 37 38 # Neon load single element to all lanes 39 40 VLD_all_lanes 1111 0100 1 . 1 0 rn:4 .... 11 n:2 size:2 t:1 a:1 rm:4 \ 41 vd=%vd_dp 42 43 # Neon load/store single structure to one lane 44 %imm1_5_p1 5:1 !function=plus_1 45 %imm1_6_p1 6:1 !function=plus_1 46 47 VLDST_single 1111 0100 1 . l:1 0 rn:4 .... 00 n:2 reg_idx:3 align:1 rm:4 \ 48 vd=%vd_dp size=0 stride=1 49 VLDST_single 1111 0100 1 . l:1 0 rn:4 .... 01 n:2 reg_idx:2 . align:1 rm:4 \ 50 vd=%vd_dp size=1 stride=%imm1_5_p1 51 VLDST_single 1111 0100 1 . l:1 0 rn:4 .... 10 n:2 reg_idx:1 . align:2 rm:4 \ 52 vd=%vd_dp size=2 stride=%imm1_6_p1