1865f3bb9SMichael Rolnik# 2865f3bb9SMichael Rolnik# AVR instruction decode definitions. 3865f3bb9SMichael Rolnik# 4865f3bb9SMichael Rolnik# Copyright (c) 2019-2020 Michael Rolnik <mrolnik@gmail.com> 5865f3bb9SMichael Rolnik# 6865f3bb9SMichael Rolnik# This library is free software; you can redistribute it and/or 7865f3bb9SMichael Rolnik# modify it under the terms of the GNU Lesser General Public 8865f3bb9SMichael Rolnik# License as published by the Free Software Foundation; either 9865f3bb9SMichael Rolnik# version 2.1 of the License, or (at your option) any later version. 10865f3bb9SMichael Rolnik# 11865f3bb9SMichael Rolnik# This library is distributed in the hope that it will be useful, 12865f3bb9SMichael Rolnik# but WITHOUT ANY WARRANTY; without even the implied warranty of 13865f3bb9SMichael Rolnik# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14865f3bb9SMichael Rolnik# Lesser General Public License for more details. 15865f3bb9SMichael Rolnik# 16865f3bb9SMichael Rolnik# You should have received a copy of the GNU Lesser General Public 17865f3bb9SMichael Rolnik# License along with this library; if not, see <http://www.gnu.org/licenses/>. 18865f3bb9SMichael Rolnik# 19865f3bb9SMichael Rolnik 20865f3bb9SMichael Rolnik# 21865f3bb9SMichael Rolnik# regs_16_31_by_one = [16 .. 31] 22865f3bb9SMichael Rolnik# regs_16_23_by_one = [16 .. 23] 23865f3bb9SMichael Rolnik# regs_24_30_by_two = [24, 26, 28, 30] 24865f3bb9SMichael Rolnik# regs_00_30_by_two = [0, 2, 4, 6, 8, .. 30] 25865f3bb9SMichael Rolnik 26865f3bb9SMichael Rolnik%rd 4:5 27865f3bb9SMichael Rolnik%rr 9:1 0:4 28865f3bb9SMichael Rolnik 29865f3bb9SMichael Rolnik%rd_a 4:4 !function=to_regs_16_31_by_one 30865f3bb9SMichael Rolnik%rd_b 4:3 !function=to_regs_16_23_by_one 31865f3bb9SMichael Rolnik%rd_c 4:2 !function=to_regs_24_30_by_two 32865f3bb9SMichael Rolnik%rr_a 0:4 !function=to_regs_16_31_by_one 33865f3bb9SMichael Rolnik%rr_b 0:3 !function=to_regs_16_23_by_one 34865f3bb9SMichael Rolnik 35865f3bb9SMichael Rolnik%imm6 6:2 0:4 36865f3bb9SMichael Rolnik%imm8 8:4 0:4 37865f3bb9SMichael Rolnik 38865f3bb9SMichael Rolnik%io_imm 9:2 0:4 39865f3bb9SMichael Rolnik%ldst_d_imm 13:1 10:2 0:3 40865f3bb9SMichael Rolnik 41865f3bb9SMichael Rolnik 42865f3bb9SMichael Rolnik&rd_rr rd rr 43865f3bb9SMichael Rolnik&rd_imm rd imm 44865f3bb9SMichael Rolnik 45865f3bb9SMichael Rolnik@op_rd_rr .... .. . ..... .... &rd_rr rd=%rd rr=%rr 46865f3bb9SMichael Rolnik@op_rd_imm6 .... .... .. .. .... &rd_imm rd=%rd_c imm=%imm6 47865f3bb9SMichael Rolnik@op_rd_imm8 .... .... .... .... &rd_imm rd=%rd_a imm=%imm8 48865f3bb9SMichael Rolnik@fmul .... .... . ... . ... &rd_rr rd=%rd_b rr=%rr_b 49865f3bb9SMichael Rolnik 50865f3bb9SMichael Rolnik# 51865f3bb9SMichael Rolnik# Arithmetic Instructions 52865f3bb9SMichael Rolnik# 53865f3bb9SMichael RolnikADD 0000 11 . ..... .... @op_rd_rr 54865f3bb9SMichael RolnikADC 0001 11 . ..... .... @op_rd_rr 55865f3bb9SMichael RolnikADIW 1001 0110 .. .. .... @op_rd_imm6 56865f3bb9SMichael RolnikSUB 0001 10 . ..... .... @op_rd_rr 57865f3bb9SMichael RolnikSUBI 0101 .... .... .... @op_rd_imm8 58865f3bb9SMichael RolnikSBC 0000 10 . ..... .... @op_rd_rr 59865f3bb9SMichael RolnikSBCI 0100 .... .... .... @op_rd_imm8 60865f3bb9SMichael RolnikSBIW 1001 0111 .. .. .... @op_rd_imm6 61865f3bb9SMichael RolnikAND 0010 00 . ..... .... @op_rd_rr 62865f3bb9SMichael RolnikANDI 0111 .... .... .... @op_rd_imm8 63865f3bb9SMichael RolnikOR 0010 10 . ..... .... @op_rd_rr 64865f3bb9SMichael RolnikORI 0110 .... .... .... @op_rd_imm8 65865f3bb9SMichael RolnikEOR 0010 01 . ..... .... @op_rd_rr 66865f3bb9SMichael RolnikCOM 1001 010 rd:5 0000 67865f3bb9SMichael RolnikNEG 1001 010 rd:5 0001 68865f3bb9SMichael RolnikINC 1001 010 rd:5 0011 69865f3bb9SMichael RolnikDEC 1001 010 rd:5 1010 70865f3bb9SMichael RolnikMUL 1001 11 . ..... .... @op_rd_rr 71865f3bb9SMichael RolnikMULS 0000 0010 .... .... &rd_rr rd=%rd_a rr=%rr_a 72865f3bb9SMichael RolnikMULSU 0000 0011 0 ... 0 ... @fmul 73865f3bb9SMichael RolnikFMUL 0000 0011 0 ... 1 ... @fmul 74865f3bb9SMichael RolnikFMULS 0000 0011 1 ... 0 ... @fmul 75865f3bb9SMichael RolnikFMULSU 0000 0011 1 ... 1 ... @fmul 76865f3bb9SMichael RolnikDES 1001 0100 imm:4 1011 77*9d316c75SMichael Rolnik 78*9d316c75SMichael Rolnik# 79*9d316c75SMichael Rolnik# Branch Instructions 80*9d316c75SMichael Rolnik# 81*9d316c75SMichael Rolnik 82*9d316c75SMichael Rolnik# The 22-bit immediate is partially in the opcode word, 83*9d316c75SMichael Rolnik# and partially in the next. Use append_16 to build the 84*9d316c75SMichael Rolnik# complete 22-bit value. 85*9d316c75SMichael Rolnik%imm_call 4:5 0:1 !function=append_16 86*9d316c75SMichael Rolnik 87*9d316c75SMichael Rolnik@op_bit .... .... . bit:3 .... 88*9d316c75SMichael Rolnik@op_bit_imm .... .. imm:s7 bit:3 89*9d316c75SMichael Rolnik 90*9d316c75SMichael RolnikRJMP 1100 imm:s12 91*9d316c75SMichael RolnikIJMP 1001 0100 0000 1001 92*9d316c75SMichael RolnikEIJMP 1001 0100 0001 1001 93*9d316c75SMichael RolnikJMP 1001 010 ..... 110 . imm=%imm_call 94*9d316c75SMichael RolnikRCALL 1101 imm:s12 95*9d316c75SMichael RolnikICALL 1001 0101 0000 1001 96*9d316c75SMichael RolnikEICALL 1001 0101 0001 1001 97*9d316c75SMichael RolnikCALL 1001 010 ..... 111 . imm=%imm_call 98*9d316c75SMichael RolnikRET 1001 0101 0000 1000 99*9d316c75SMichael RolnikRETI 1001 0101 0001 1000 100*9d316c75SMichael RolnikCPSE 0001 00 . ..... .... @op_rd_rr 101*9d316c75SMichael RolnikCP 0001 01 . ..... .... @op_rd_rr 102*9d316c75SMichael RolnikCPC 0000 01 . ..... .... @op_rd_rr 103*9d316c75SMichael RolnikCPI 0011 .... .... .... @op_rd_imm8 104*9d316c75SMichael RolnikSBRC 1111 110 rr:5 0 bit:3 105*9d316c75SMichael RolnikSBRS 1111 111 rr:5 0 bit:3 106*9d316c75SMichael RolnikSBIC 1001 1001 reg:5 bit:3 107*9d316c75SMichael RolnikSBIS 1001 1011 reg:5 bit:3 108*9d316c75SMichael RolnikBRBS 1111 00 ....... ... @op_bit_imm 109*9d316c75SMichael RolnikBRBC 1111 01 ....... ... @op_bit_imm 110