| # Thumb1 instructions |
| # |
| # Copyright (c) 2019 Linaro, Ltd |
| # |
| # 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 2.1 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/>. |
| |
| # |
| # This file is processed by scripts/decodetree.py |
| # |
| |
| &empty !extern |
| &s_rrr_shi !extern s rd rn rm shim shty |
| &s_rrr_shr !extern s rn rd rm rs shty |
| &s_rri_rot !extern s rn rd imm rot |
| &s_rrrr !extern s rd rn rm ra |
| &rrr_rot !extern rd rn rm rot |
| &rr !extern rd rm |
| &ri !extern rd imm |
| &r !extern rm |
| &i !extern imm |
| &ldst_rr !extern p w u rn rt rm shimm shtype |
| &ldst_ri !extern p w u rn rt imm |
| &ldst_block !extern rn i b u w list |
| &setend !extern E |
| &cps !extern mode imod M A I F |
| &ci !extern cond imm |
| |
| # Set S if the instruction is outside of an IT block. |
| %s !function=t16_setflags |
| |
| # Data-processing (two low registers) |
| |
| %reg_0 0:3 |
| |
| @lll_noshr ...... .... rm:3 rd:3 \ |
| &s_rrr_shi %s rn=%reg_0 shim=0 shty=0 |
| @xll_noshr ...... .... rm:3 rn:3 \ |
| &s_rrr_shi s=1 rd=0 shim=0 shty=0 |
| @lxl_shr ...... .... rs:3 rd:3 \ |
| &s_rrr_shr %s rm=%reg_0 rn=0 |
| |
| AND_rrri 010000 0000 ... ... @lll_noshr |
| EOR_rrri 010000 0001 ... ... @lll_noshr |
| MOV_rxrr 010000 0010 ... ... @lxl_shr shty=0 # LSL |
| MOV_rxrr 010000 0011 ... ... @lxl_shr shty=1 # LSR |
| MOV_rxrr 010000 0100 ... ... @lxl_shr shty=2 # ASR |
| ADC_rrri 010000 0101 ... ... @lll_noshr |
| SBC_rrri 010000 0110 ... ... @lll_noshr |
| MOV_rxrr 010000 0111 ... ... @lxl_shr shty=3 # ROR |
| TST_xrri 010000 1000 ... ... @xll_noshr |
| RSB_rri 010000 1001 rn:3 rd:3 &s_rri_rot %s imm=0 rot=0 |
| CMP_xrri 010000 1010 ... ... @xll_noshr |
| CMN_xrri 010000 1011 ... ... @xll_noshr |
| ORR_rrri 010000 1100 ... ... @lll_noshr |
| MUL 010000 1101 rn:3 rd:3 &s_rrrr %s rm=%reg_0 ra=0 |
| BIC_rrri 010000 1110 ... ... @lll_noshr |
| MVN_rxri 010000 1111 ... ... @lll_noshr |
| |
| # Load/store (register offset) |
| |
| @ldst_rr ....... rm:3 rn:3 rt:3 \ |
| &ldst_rr p=1 w=0 u=1 shimm=0 shtype=0 |
| |
| STR_rr 0101 000 ... ... ... @ldst_rr |
| STRH_rr 0101 001 ... ... ... @ldst_rr |
| STRB_rr 0101 010 ... ... ... @ldst_rr |
| LDRSB_rr 0101 011 ... ... ... @ldst_rr |
| LDR_rr 0101 100 ... ... ... @ldst_rr |
| LDRH_rr 0101 101 ... ... ... @ldst_rr |
| LDRB_rr 0101 110 ... ... ... @ldst_rr |
| LDRSH_rr 0101 111 ... ... ... @ldst_rr |
| |
| # Load/store word/byte (immediate offset) |
| |
| %imm5_6x4 6:5 !function=times_4 |
| |
| @ldst_ri_1 ..... imm:5 rn:3 rt:3 \ |
| &ldst_ri p=1 w=0 u=1 |
| @ldst_ri_4 ..... ..... rn:3 rt:3 \ |
| &ldst_ri p=1 w=0 u=1 imm=%imm5_6x4 |
| |
| STR_ri 01100 ..... ... ... @ldst_ri_4 |
| LDR_ri 01101 ..... ... ... @ldst_ri_4 |
| STRB_ri 01110 ..... ... ... @ldst_ri_1 |
| LDRB_ri 01111 ..... ... ... @ldst_ri_1 |
| |
| # Load/store halfword (immediate offset) |
| |
| %imm5_6x2 6:5 !function=times_2 |
| @ldst_ri_2 ..... ..... rn:3 rt:3 \ |
| &ldst_ri p=1 w=0 u=1 imm=%imm5_6x2 |
| |
| STRH_ri 10000 ..... ... ... @ldst_ri_2 |
| LDRH_ri 10001 ..... ... ... @ldst_ri_2 |
| |
| # Load/store (SP-relative) |
| |
| %imm8_0x4 0:8 !function=times_4 |
| @ldst_spec_i ..... rt:3 ........ \ |
| &ldst_ri p=1 w=0 u=1 imm=%imm8_0x4 |
| |
| STR_ri 10010 ... ........ @ldst_spec_i rn=13 |
| LDR_ri 10011 ... ........ @ldst_spec_i rn=13 |
| |
| # Load (PC-relative) |
| |
| LDR_ri 01001 ... ........ @ldst_spec_i rn=15 |
| |
| # Add PC/SP (immediate) |
| |
| ADR 10100 rd:3 ........ imm=%imm8_0x4 |
| ADD_rri 10101 rd:3 ........ \ |
| &s_rri_rot rn=13 s=0 rot=0 imm=%imm8_0x4 # SP |
| |
| # Load/store multiple |
| |
| @ldstm ..... rn:3 list:8 &ldst_block i=1 b=0 u=0 w=1 |
| |
| STM 11000 ... ........ @ldstm |
| LDM_t16 11001 ... ........ @ldstm |
| |
| # Shift (immediate) |
| |
| @shift_i ..... shim:5 rm:3 rd:3 &s_rrr_shi %s rn=%reg_0 |
| |
| MOV_rxri 000 00 ..... ... ... @shift_i shty=0 # LSL |
| MOV_rxri 000 01 ..... ... ... @shift_i shty=1 # LSR |
| MOV_rxri 000 10 ..... ... ... @shift_i shty=2 # ASR |
| |
| # Add/subtract (three low registers) |
| |
| @addsub_3 ....... rm:3 rn:3 rd:3 \ |
| &s_rrr_shi %s shim=0 shty=0 |
| |
| ADD_rrri 0001100 ... ... ... @addsub_3 |
| SUB_rrri 0001101 ... ... ... @addsub_3 |
| |
| # Add/subtract (two low registers and immediate) |
| |
| @addsub_2i ....... imm:3 rn:3 rd:3 \ |
| &s_rri_rot %s rot=0 |
| |
| ADD_rri 0001 110 ... ... ... @addsub_2i |
| SUB_rri 0001 111 ... ... ... @addsub_2i |
| |
| # Add, subtract, compare, move (one low register and immediate) |
| |
| %reg_8 8:3 |
| @arith_1i ..... rd:3 imm:8 \ |
| &s_rri_rot rot=0 rn=%reg_8 |
| |
| MOV_rxi 00100 ... ........ @arith_1i %s |
| CMP_xri 00101 ... ........ @arith_1i s=1 |
| ADD_rri 00110 ... ........ @arith_1i %s |
| SUB_rri 00111 ... ........ @arith_1i %s |
| |
| # Add, compare, move (two high registers) |
| |
| %reg_0_7 7:1 0:3 |
| @addsub_2h .... .... . rm:4 ... \ |
| &s_rrr_shi rd=%reg_0_7 rn=%reg_0_7 shim=0 shty=0 |
| |
| ADD_rrri 0100 0100 . .... ... @addsub_2h s=0 |
| CMP_xrri 0100 0101 . .... ... @addsub_2h s=1 |
| MOV_rxri 0100 0110 . .... ... @addsub_2h s=0 |
| |
| # Adjust SP (immediate) |
| |
| %imm7_0x4 0:7 !function=times_4 |
| @addsub_sp_i .... .... . ....... \ |
| &s_rri_rot s=0 rd=13 rn=13 rot=0 imm=%imm7_0x4 |
| |
| ADD_rri 1011 0000 0 ....... @addsub_sp_i |
| SUB_rri 1011 0000 1 ....... @addsub_sp_i |
| |
| # Branch and exchange |
| |
| @branchr .... .... . rm:4 ... &r |
| |
| BX 0100 0111 0 .... 000 @branchr |
| BLX_r 0100 0111 1 .... 000 @branchr |
| BXNS 0100 0111 0 .... 100 @branchr |
| BLXNS 0100 0111 1 .... 100 @branchr |
| |
| # Extend |
| |
| @extend .... .... .. rm:3 rd:3 &rrr_rot rn=15 rot=0 |
| |
| SXTAH 1011 0010 00 ... ... @extend |
| SXTAB 1011 0010 01 ... ... @extend |
| UXTAH 1011 0010 10 ... ... @extend |
| UXTAB 1011 0010 11 ... ... @extend |
| |
| # Change processor state |
| |
| %imod 4:1 !function=plus_2 |
| |
| SETEND 1011 0110 010 1 E:1 000 &setend |
| { |
| CPS 1011 0110 011 . 0 A:1 I:1 F:1 &cps mode=0 M=0 %imod |
| CPS_v7m 1011 0110 011 im:1 00 I:1 F:1 |
| } |
| |
| # Reverse bytes |
| |
| @rdm .... .... .. rm:3 rd:3 &rr |
| |
| REV 1011 1010 00 ... ... @rdm |
| REV16 1011 1010 01 ... ... @rdm |
| REVSH 1011 1010 11 ... ... @rdm |
| |
| # Hints |
| |
| { |
| { |
| YIELD 1011 1111 0001 0000 |
| WFE 1011 1111 0010 0000 |
| WFI 1011 1111 0011 0000 |
| |
| # TODO: Implement SEV, SEVL; may help SMP performance. |
| # SEV 1011 1111 0100 0000 |
| # SEVL 1011 1111 0101 0000 |
| |
| # The canonical nop has the second nibble as 0000, but the whole of the |
| # rest of the space is a reserved hint, behaves as nop. |
| NOP 1011 1111 ---- 0000 |
| } |
| IT 1011 1111 cond_mask:8 |
| } |
| |
| # Miscellaneous 16-bit instructions |
| |
| %imm6_9_3 9:1 3:5 !function=times_2 |
| |
| HLT 1011 1010 10 imm:6 &i |
| BKPT 1011 1110 imm:8 &i |
| CBZ 1011 nz:1 0.1 ..... rn:3 imm=%imm6_9_3 |
| |
| # Push and Pop |
| |
| %push_list 0:9 !function=t16_push_list |
| %pop_list 0:9 !function=t16_pop_list |
| |
| STM 1011 010 ......... \ |
| &ldst_block i=0 b=1 u=0 w=1 rn=13 list=%push_list |
| LDM_t16 1011 110 ......... \ |
| &ldst_block i=1 b=0 u=0 w=1 rn=13 list=%pop_list |
| |
| # Conditional branches, Supervisor call |
| |
| %imm8_0x2 0:s8 !function=times_2 |
| |
| { |
| UDF 1101 1110 ---- ---- |
| SVC 1101 1111 imm:8 &i |
| B_cond_thumb 1101 cond:4 ........ &ci imm=%imm8_0x2 |
| } |
| |
| # Unconditional Branch |
| |
| %imm11_0x2 0:s11 !function=times_2 |
| |
| B 11100 ........... &i imm=%imm11_0x2 |
| |
| # thumb_insn_is_16bit() ensures we won't be decoding these as |
| # T16 instructions for a Thumb2 CPU, so these patterns must be |
| # a Thumb1 split BL/BLX. |
| BLX_suffix 11101 imm:11 &i |
| BL_BLX_prefix 11110 imm:s11 &i |
| BL_suffix 11111 imm:11 &i |
