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vfp.decode (11321B)


      1 # AArch32 VFP instruction descriptions (conditional insns)
      2 #
      3 #  Copyright (c) 2019 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 # Encodings for the conditional VFP instructions are here:
     22 # generally anything matching A32
     23 #  cccc 11.. .... .... .... 101. .... ....
     24 # and T32
     25 #  1110 110. .... .... .... 101. .... ....
     26 #  1110 1110 .... .... .... 101. .... ....
     27 # (but those patterns might also cover some Neon instructions,
     28 # which do not live in this file.)
     29 
     30 # VFP registers have an odd encoding with a four-bit field
     31 # and a one-bit field which are assembled in different orders
     32 # depending on whether the register is double or single precision.
     33 # Each individual instruction function must do the checks for
     34 # "double register selected but CPU does not have double support"
     35 # and "double register number has bit 4 set but CPU does not
     36 # support D16-D31" (which should UNDEF).
     37 %vm_dp  5:1 0:4
     38 %vm_sp  0:4 5:1
     39 %vn_dp  7:1 16:4
     40 %vn_sp  16:4 7:1
     41 %vd_dp  22:1 12:4
     42 %vd_sp  12:4 22:1
     43 
     44 %vmov_idx_b     21:1 5:2
     45 %vmov_idx_h     21:1 6:1
     46 
     47 %vmov_imm 16:4 0:4
     48 
     49 @vfp_dnm_s   ................................ vm=%vm_sp vn=%vn_sp vd=%vd_sp
     50 @vfp_dnm_d   ................................ vm=%vm_dp vn=%vn_dp vd=%vd_dp
     51 
     52 @vfp_dm_ss   ................................ vm=%vm_sp vd=%vd_sp
     53 @vfp_dm_dd   ................................ vm=%vm_dp vd=%vd_dp
     54 @vfp_dm_ds   ................................ vm=%vm_sp vd=%vd_dp
     55 @vfp_dm_sd   ................................ vm=%vm_dp vd=%vd_sp
     56 
     57 # VMOV scalar to general-purpose register; note that this does
     58 # include some Neon cases.
     59 VMOV_to_gp   ---- 1110 u:1 1.        1 .... rt:4 1011 ... 1 0000 \
     60              vn=%vn_dp size=0 index=%vmov_idx_b
     61 VMOV_to_gp   ---- 1110 u:1 0.        1 .... rt:4 1011 ..1 1 0000 \
     62              vn=%vn_dp size=1 index=%vmov_idx_h
     63 VMOV_to_gp   ---- 1110 0   0 index:1 1 .... rt:4 1011 .00 1 0000 \
     64              vn=%vn_dp size=2 u=0
     65 
     66 VMOV_from_gp ---- 1110 0 1.        0 .... rt:4 1011 ... 1 0000 \
     67              vn=%vn_dp size=0 index=%vmov_idx_b
     68 VMOV_from_gp ---- 1110 0 0.        0 .... rt:4 1011 ..1 1 0000 \
     69              vn=%vn_dp size=1 index=%vmov_idx_h
     70 VMOV_from_gp ---- 1110 0 0 index:1 0 .... rt:4 1011 .00 1 0000 \
     71              vn=%vn_dp size=2
     72 
     73 VDUP         ---- 1110 1 b:1 q:1 0 .... rt:4 1011 . 0 e:1 1 0000 \
     74              vn=%vn_dp
     75 
     76 VMSR_VMRS    ---- 1110 111 l:1 reg:4 rt:4 1010 0001 0000
     77 VMOV_half    ---- 1110 000 l:1 .... rt:4 1001 . 001 0000    vn=%vn_sp
     78 VMOV_single  ---- 1110 000 l:1 .... rt:4 1010 . 001 0000    vn=%vn_sp
     79 
     80 VMOV_64_sp   ---- 1100 010 op:1 rt2:4 rt:4 1010 00.1 ....   vm=%vm_sp
     81 VMOV_64_dp   ---- 1100 010 op:1 rt2:4 rt:4 1011 00.1 ....   vm=%vm_dp
     82 
     83 VLDR_VSTR_hp ---- 1101 u:1 .0 l:1 rn:4 .... 1001 imm:8      vd=%vd_sp
     84 VLDR_VSTR_sp ---- 1101 u:1 .0 l:1 rn:4 .... 1010 imm:8      vd=%vd_sp
     85 VLDR_VSTR_dp ---- 1101 u:1 .0 l:1 rn:4 .... 1011 imm:8      vd=%vd_dp
     86 
     87 # We split the load/store multiple up into two patterns to avoid
     88 # overlap with other insns in the "Advanced SIMD load/store and 64-bit move"
     89 # grouping:
     90 #   P=0 U=0 W=0 is 64-bit VMOV
     91 #   P=1 W=0 is VLDR/VSTR
     92 #   P=U W=1 is UNDEF
     93 # leaving P=0 U=1 W=x and P=1 U=0 W=1 for load/store multiple.
     94 # These include FSTM/FLDM.
     95 VLDM_VSTM_sp ---- 1100 1 . w:1 l:1 rn:4 .... 1010 imm:8 \
     96              vd=%vd_sp p=0 u=1
     97 VLDM_VSTM_dp ---- 1100 1 . w:1 l:1 rn:4 .... 1011 imm:8 \
     98              vd=%vd_dp p=0 u=1
     99 
    100 VLDM_VSTM_sp ---- 1101 0.1 l:1 rn:4 .... 1010 imm:8 \
    101              vd=%vd_sp p=1 u=0 w=1
    102 VLDM_VSTM_dp ---- 1101 0.1 l:1 rn:4 .... 1011 imm:8 \
    103              vd=%vd_dp p=1 u=0 w=1
    104 
    105 # 3-register VFP data-processing; bits [23,21:20,6] identify the operation.
    106 VMLA_hp      ---- 1110 0.00 .... .... 1001 .0.0 ....        @vfp_dnm_s
    107 VMLA_sp      ---- 1110 0.00 .... .... 1010 .0.0 ....        @vfp_dnm_s
    108 VMLA_dp      ---- 1110 0.00 .... .... 1011 .0.0 ....        @vfp_dnm_d
    109 
    110 VMLS_hp      ---- 1110 0.00 .... .... 1001 .1.0 ....        @vfp_dnm_s
    111 VMLS_sp      ---- 1110 0.00 .... .... 1010 .1.0 ....        @vfp_dnm_s
    112 VMLS_dp      ---- 1110 0.00 .... .... 1011 .1.0 ....        @vfp_dnm_d
    113 
    114 VNMLS_hp     ---- 1110 0.01 .... .... 1001 .0.0 ....        @vfp_dnm_s
    115 VNMLS_sp     ---- 1110 0.01 .... .... 1010 .0.0 ....        @vfp_dnm_s
    116 VNMLS_dp     ---- 1110 0.01 .... .... 1011 .0.0 ....        @vfp_dnm_d
    117 
    118 VNMLA_hp     ---- 1110 0.01 .... .... 1001 .1.0 ....        @vfp_dnm_s
    119 VNMLA_sp     ---- 1110 0.01 .... .... 1010 .1.0 ....        @vfp_dnm_s
    120 VNMLA_dp     ---- 1110 0.01 .... .... 1011 .1.0 ....        @vfp_dnm_d
    121 
    122 VMUL_hp      ---- 1110 0.10 .... .... 1001 .0.0 ....        @vfp_dnm_s
    123 VMUL_sp      ---- 1110 0.10 .... .... 1010 .0.0 ....        @vfp_dnm_s
    124 VMUL_dp      ---- 1110 0.10 .... .... 1011 .0.0 ....        @vfp_dnm_d
    125 
    126 VNMUL_hp     ---- 1110 0.10 .... .... 1001 .1.0 ....        @vfp_dnm_s
    127 VNMUL_sp     ---- 1110 0.10 .... .... 1010 .1.0 ....        @vfp_dnm_s
    128 VNMUL_dp     ---- 1110 0.10 .... .... 1011 .1.0 ....        @vfp_dnm_d
    129 
    130 VADD_hp      ---- 1110 0.11 .... .... 1001 .0.0 ....        @vfp_dnm_s
    131 VADD_sp      ---- 1110 0.11 .... .... 1010 .0.0 ....        @vfp_dnm_s
    132 VADD_dp      ---- 1110 0.11 .... .... 1011 .0.0 ....        @vfp_dnm_d
    133 
    134 VSUB_hp      ---- 1110 0.11 .... .... 1001 .1.0 ....        @vfp_dnm_s
    135 VSUB_sp      ---- 1110 0.11 .... .... 1010 .1.0 ....        @vfp_dnm_s
    136 VSUB_dp      ---- 1110 0.11 .... .... 1011 .1.0 ....        @vfp_dnm_d
    137 
    138 VDIV_hp      ---- 1110 1.00 .... .... 1001 .0.0 ....        @vfp_dnm_s
    139 VDIV_sp      ---- 1110 1.00 .... .... 1010 .0.0 ....        @vfp_dnm_s
    140 VDIV_dp      ---- 1110 1.00 .... .... 1011 .0.0 ....        @vfp_dnm_d
    141 
    142 VFMA_hp      ---- 1110 1.10 .... .... 1001 .0. 0 ....       @vfp_dnm_s
    143 VFMS_hp      ---- 1110 1.10 .... .... 1001 .1. 0 ....       @vfp_dnm_s
    144 VFNMA_hp     ---- 1110 1.01 .... .... 1001 .0. 0 ....       @vfp_dnm_s
    145 VFNMS_hp     ---- 1110 1.01 .... .... 1001 .1. 0 ....       @vfp_dnm_s
    146 
    147 VFMA_sp      ---- 1110 1.10 .... .... 1010 .0. 0 ....       @vfp_dnm_s
    148 VFMS_sp      ---- 1110 1.10 .... .... 1010 .1. 0 ....       @vfp_dnm_s
    149 VFNMA_sp     ---- 1110 1.01 .... .... 1010 .0. 0 ....       @vfp_dnm_s
    150 VFNMS_sp     ---- 1110 1.01 .... .... 1010 .1. 0 ....       @vfp_dnm_s
    151 
    152 VFMA_dp      ---- 1110 1.10 .... .... 1011 .0.0 ....        @vfp_dnm_d
    153 VFMS_dp      ---- 1110 1.10 .... .... 1011 .1.0 ....        @vfp_dnm_d
    154 VFNMA_dp     ---- 1110 1.01 .... .... 1011 .0.0 ....        @vfp_dnm_d
    155 VFNMS_dp     ---- 1110 1.01 .... .... 1011 .1.0 ....        @vfp_dnm_d
    156 
    157 VMOV_imm_hp  ---- 1110 1.11 .... .... 1001 0000 .... \
    158              vd=%vd_sp imm=%vmov_imm
    159 VMOV_imm_sp  ---- 1110 1.11 .... .... 1010 0000 .... \
    160              vd=%vd_sp imm=%vmov_imm
    161 VMOV_imm_dp  ---- 1110 1.11 .... .... 1011 0000 .... \
    162              vd=%vd_dp imm=%vmov_imm
    163 
    164 VMOV_reg_sp  ---- 1110 1.11 0000 .... 1010 01.0 ....        @vfp_dm_ss
    165 VMOV_reg_dp  ---- 1110 1.11 0000 .... 1011 01.0 ....        @vfp_dm_dd
    166 
    167 VABS_hp      ---- 1110 1.11 0000 .... 1001 11.0 ....        @vfp_dm_ss
    168 VABS_sp      ---- 1110 1.11 0000 .... 1010 11.0 ....        @vfp_dm_ss
    169 VABS_dp      ---- 1110 1.11 0000 .... 1011 11.0 ....        @vfp_dm_dd
    170 
    171 VNEG_hp      ---- 1110 1.11 0001 .... 1001 01.0 ....        @vfp_dm_ss
    172 VNEG_sp      ---- 1110 1.11 0001 .... 1010 01.0 ....        @vfp_dm_ss
    173 VNEG_dp      ---- 1110 1.11 0001 .... 1011 01.0 ....        @vfp_dm_dd
    174 
    175 VSQRT_hp     ---- 1110 1.11 0001 .... 1001 11.0 ....        @vfp_dm_ss
    176 VSQRT_sp     ---- 1110 1.11 0001 .... 1010 11.0 ....        @vfp_dm_ss
    177 VSQRT_dp     ---- 1110 1.11 0001 .... 1011 11.0 ....        @vfp_dm_dd
    178 
    179 VCMP_hp      ---- 1110 1.11 010 z:1 .... 1001 e:1 1.0 .... \
    180              vd=%vd_sp vm=%vm_sp
    181 VCMP_sp      ---- 1110 1.11 010 z:1 .... 1010 e:1 1.0 .... \
    182              vd=%vd_sp vm=%vm_sp
    183 VCMP_dp      ---- 1110 1.11 010 z:1 .... 1011 e:1 1.0 .... \
    184              vd=%vd_dp vm=%vm_dp
    185 
    186 # VCVTT and VCVTB from f16: Vd format depends on size bit; Vm is always vm_sp
    187 VCVT_f32_f16 ---- 1110 1.11 0010 .... 1010 t:1 1.0 .... \
    188              vd=%vd_sp vm=%vm_sp
    189 VCVT_f64_f16 ---- 1110 1.11 0010 .... 1011 t:1 1.0 .... \
    190              vd=%vd_dp vm=%vm_sp
    191 
    192 # VCVTB and VCVTT to f16: Vd format is always vd_sp;
    193 # Vm format depends on size bit
    194 VCVT_b16_f32 ---- 1110 1.11 0011 .... 1001 t:1 1.0 .... \
    195              vd=%vd_sp vm=%vm_sp
    196 VCVT_f16_f32 ---- 1110 1.11 0011 .... 1010 t:1 1.0 .... \
    197              vd=%vd_sp vm=%vm_sp
    198 VCVT_f16_f64 ---- 1110 1.11 0011 .... 1011 t:1 1.0 .... \
    199              vd=%vd_sp vm=%vm_dp
    200 
    201 VRINTR_hp    ---- 1110 1.11 0110 .... 1001 01.0 ....        @vfp_dm_ss
    202 VRINTR_sp    ---- 1110 1.11 0110 .... 1010 01.0 ....        @vfp_dm_ss
    203 VRINTR_dp    ---- 1110 1.11 0110 .... 1011 01.0 ....        @vfp_dm_dd
    204 
    205 VRINTZ_hp    ---- 1110 1.11 0110 .... 1001 11.0 ....        @vfp_dm_ss
    206 VRINTZ_sp    ---- 1110 1.11 0110 .... 1010 11.0 ....        @vfp_dm_ss
    207 VRINTZ_dp    ---- 1110 1.11 0110 .... 1011 11.0 ....        @vfp_dm_dd
    208 
    209 VRINTX_hp    ---- 1110 1.11 0111 .... 1001 01.0 ....        @vfp_dm_ss
    210 VRINTX_sp    ---- 1110 1.11 0111 .... 1010 01.0 ....        @vfp_dm_ss
    211 VRINTX_dp    ---- 1110 1.11 0111 .... 1011 01.0 ....        @vfp_dm_dd
    212 
    213 # VCVT between single and double:
    214 # Vm precision depends on size; Vd is its reverse
    215 VCVT_sp      ---- 1110 1.11 0111 .... 1010 11.0 ....        @vfp_dm_ds
    216 VCVT_dp      ---- 1110 1.11 0111 .... 1011 11.0 ....        @vfp_dm_sd
    217 
    218 # VCVT from integer to floating point: Vm always single; Vd depends on size
    219 VCVT_int_hp  ---- 1110 1.11 1000 .... 1001 s:1 1.0 .... \
    220              vd=%vd_sp vm=%vm_sp
    221 VCVT_int_sp  ---- 1110 1.11 1000 .... 1010 s:1 1.0 .... \
    222              vd=%vd_sp vm=%vm_sp
    223 VCVT_int_dp  ---- 1110 1.11 1000 .... 1011 s:1 1.0 .... \
    224              vd=%vd_dp vm=%vm_sp
    225 
    226 # VJCVT is always dp to sp
    227 VJCVT        ---- 1110 1.11 1001 .... 1011 11.0 ....        @vfp_dm_sd
    228 
    229 # VCVT between floating-point and fixed-point. The immediate value
    230 # is in the same format as a Vm single-precision register number.
    231 # We assemble bits 18 (op), 16 (u) and 7 (sx) into a single opc field
    232 # for the convenience of the trans_VCVT_fix functions.
    233 %vcvt_fix_op 18:1 16:1 7:1
    234 VCVT_fix_hp  ---- 1110 1.11 1.1. .... 1001 .1.0 .... \
    235              vd=%vd_sp imm=%vm_sp opc=%vcvt_fix_op
    236 VCVT_fix_sp  ---- 1110 1.11 1.1. .... 1010 .1.0 .... \
    237              vd=%vd_sp imm=%vm_sp opc=%vcvt_fix_op
    238 VCVT_fix_dp  ---- 1110 1.11 1.1. .... 1011 .1.0 .... \
    239              vd=%vd_dp imm=%vm_sp opc=%vcvt_fix_op
    240 
    241 # VCVT float to integer (VCVT and VCVTR): Vd always single; Vd depends on size
    242 VCVT_hp_int  ---- 1110 1.11 110 s:1 .... 1001 rz:1 1.0 .... \
    243              vd=%vd_sp vm=%vm_sp
    244 VCVT_sp_int  ---- 1110 1.11 110 s:1 .... 1010 rz:1 1.0 .... \
    245              vd=%vd_sp vm=%vm_sp
    246 VCVT_dp_int  ---- 1110 1.11 110 s:1 .... 1011 rz:1 1.0 .... \
    247              vd=%vd_sp vm=%vm_dp