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#
# OpenRISC instruction decode definitions.
#
# Copyright (c) 2018 Richard Henderson <rth@twiddle.net>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, see <http://www.gnu.org/licenses/>.
#
&dab d a b
&da d a
&ab a b
####
# System Instructions
####
l_sys 001000 0000000000 k:16
l_trap 001000 0100000000 k:16
l_msync 001000 1000000000 00000000 00000000
l_psync 001000 1010000000 00000000 00000000
l_csync 001000 1100000000 00000000 00000000
l_rfe 001001 ----- ----- -------- --------
####
# Branch Instructions
####
l_j 000000 n:s26
l_jal 000001 n:s26
l_bnf 000011 n:s26
l_bf 000100 n:s26
l_jr 010001 ---------- b:5 -----------
l_jalr 010010 ---------- b:5 -----------
####
# Memory Instructions
####
&load d a i
@load ...... d:5 a:5 i:s16 &load
%store_i 21:s5 0:11
&store a b i
@store ...... ..... a:5 b:5 ........... &store i=%store_i
l_lwa 011011 ..... ..... ........ ........ @load
l_lwz 100001 ..... ..... ........ ........ @load
l_lws 100010 ..... ..... ........ ........ @load
l_lbz 100011 ..... ..... ........ ........ @load
l_lbs 100100 ..... ..... ........ ........ @load
l_lhz 100101 ..... ..... ........ ........ @load
l_lhs 100110 ..... ..... ........ ........ @load
l_swa 110011 ..... ..... ..... ........... @store
l_sw 110101 ..... ..... ..... ........... @store
l_sb 110110 ..... ..... ..... ........... @store
l_sh 110111 ..... ..... ..... ........... @store
####
# Immediate Operand Instructions
####
%mtspr_k 21:5 0:11
&rri d a i
&rrk d a k
@rri ...... d:5 a:5 i:s16 &rri
@rrk ...... d:5 a:5 k:16 &rrk
l_nop 000101 01--- ----- k:16
l_addi 100111 ..... ..... ........ ........ @rri
l_addic 101000 ..... ..... ........ ........ @rri
l_andi 101001 ..... ..... ........ ........ @rrk
l_ori 101010 ..... ..... ........ ........ @rrk
l_xori 101011 ..... ..... ........ ........ @rri
l_muli 101100 ..... ..... ........ ........ @rri
l_mfspr 101101 ..... ..... ........ ........ @rrk
l_mtspr 110000 ..... a:5 b:5 ........... k=%mtspr_k
l_maci 010011 ----- a:5 i:s16
####
# Arithmetic Instructions
####
l_exths 111000 d:5 a:5 ----- - 0000 -- 1100
l_extbs 111000 d:5 a:5 ----- - 0001 -- 1100
l_exthz 111000 d:5 a:5 ----- - 0010 -- 1100
l_extbz 111000 d:5 a:5 ----- - 0011 -- 1100
l_add 111000 d:5 a:5 b:5 - 00 ---- 0000
l_addc 111000 d:5 a:5 b:5 - 00 ---- 0001
l_sub 111000 d:5 a:5 b:5 - 00 ---- 0010
l_and 111000 d:5 a:5 b:5 - 00 ---- 0011
l_or 111000 d:5 a:5 b:5 - 00 ---- 0100
l_xor 111000 d:5 a:5 b:5 - 00 ---- 0101
l_cmov 111000 d:5 a:5 b:5 - 00 ---- 1110
l_ff1 111000 d:5 a:5 ----- - 00 ---- 1111
l_fl1 111000 d:5 a:5 ----- - 01 ---- 1111
l_sll 111000 d:5 a:5 b:5 - 0000 -- 1000
l_srl 111000 d:5 a:5 b:5 - 0001 -- 1000
l_sra 111000 d:5 a:5 b:5 - 0010 -- 1000
l_ror 111000 d:5 a:5 b:5 - 0011 -- 1000
l_mul 111000 d:5 a:5 b:5 - 11 ---- 0110
l_mulu 111000 d:5 a:5 b:5 - 11 ---- 1011
l_div 111000 d:5 a:5 b:5 - 11 ---- 1001
l_divu 111000 d:5 a:5 b:5 - 11 ---- 1010
l_muld 111000 ----- a:5 b:5 - 11 ---- 0111
l_muldu 111000 ----- a:5 b:5 - 11 ---- 1100
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