| 1 | /* Disassemble ft32 instructions. |
| 2 | Copyright (C) 2013-2020 Free Software Foundation, Inc. |
| 3 | Contributed by FTDI (support@ftdichip.com) |
| 4 | |
| 5 | This file is part of the GNU opcodes library. |
| 6 | |
| 7 | This library is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | It is distributed in the hope that it will be useful, but WITHOUT |
| 13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| 15 | License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include <stdio.h> |
| 24 | #define STATIC_TABLE |
| 25 | #define DEFINE_TABLE |
| 26 | |
| 27 | #include "opcode/ft32.h" |
| 28 | #include "disassemble.h" |
| 29 | |
| 30 | extern const ft32_opc_info_t ft32_opc_info[128]; |
| 31 | |
| 32 | static fprintf_ftype fpr; |
| 33 | static void *stream; |
| 34 | |
| 35 | static int |
| 36 | sign_extend(int bit, int value) |
| 37 | { |
| 38 | int onebit = (1 << bit); |
| 39 | return (value & (onebit - 1)) - (value & onebit); |
| 40 | } |
| 41 | |
| 42 | static void |
| 43 | ft32_opcode(bfd_vma addr ATTRIBUTE_UNUSED, |
| 44 | unsigned int iword, |
| 45 | struct disassemble_info *info) |
| 46 | { |
| 47 | const ft32_opc_info_t *oo; |
| 48 | |
| 49 | for (oo = ft32_opc_info; oo->name; oo++) |
| 50 | if ((iword & oo->mask) == oo->bits) |
| 51 | break; |
| 52 | |
| 53 | unsigned int sc[2]; |
| 54 | if (ft32_decode_shortcode((unsigned int)addr, iword, sc)) |
| 55 | { |
| 56 | ft32_opcode(addr, sc[0], info); |
| 57 | fpr (stream, " ; "); |
| 58 | ft32_opcode(addr, sc[1], info); |
| 59 | } |
| 60 | |
| 61 | if (oo->name) |
| 62 | { |
| 63 | int f = oo->fields; |
| 64 | int imm; |
| 65 | |
| 66 | fpr (stream, "%s", oo->name); |
| 67 | if (oo->dw) |
| 68 | { |
| 69 | fpr (stream, ".%c ", "bsl"[(iword >> FT32_FLD_DW_BIT) & 3]); |
| 70 | } |
| 71 | else |
| 72 | { |
| 73 | fpr (stream, " "); |
| 74 | } |
| 75 | |
| 76 | while (f) |
| 77 | { |
| 78 | int lobit = f & -f; |
| 79 | if (f & lobit) |
| 80 | { |
| 81 | switch (lobit) |
| 82 | { |
| 83 | case FT32_FLD_CBCRCV: |
| 84 | // imm is {CB, CV} |
| 85 | imm = ((iword >> FT32_FLD_CB_BIT) & ((1 << FT32_FLD_CB_SIZ) - 1)) << 4; |
| 86 | imm |= ((iword >> FT32_FLD_CV_BIT) & ((1 << FT32_FLD_CV_SIZ) - 1)); |
| 87 | switch (imm) |
| 88 | { |
| 89 | case 0x00: fpr(stream, "nz"); break; |
| 90 | case 0x01: fpr(stream, "z"); break; |
| 91 | case 0x10: fpr(stream, "ae"); break; |
| 92 | case 0x11: fpr(stream, "b"); break; |
| 93 | case 0x20: fpr(stream, "no"); break; |
| 94 | case 0x21: fpr(stream, "o"); break; |
| 95 | case 0x30: fpr(stream, "ns"); break; |
| 96 | case 0x31: fpr(stream, "s"); break; |
| 97 | case 0x40: fpr(stream, "lt"); break; |
| 98 | case 0x41: fpr(stream, "gte"); break; |
| 99 | case 0x50: fpr(stream, "lte"); break; |
| 100 | case 0x51: fpr(stream, "gt"); break; |
| 101 | case 0x60: fpr(stream, "be"); break; |
| 102 | case 0x61: fpr(stream, "a"); break; |
| 103 | default: fpr(stream, "%d,$r30,%d", (imm >> 4), (imm & 1)); break; |
| 104 | } |
| 105 | break; |
| 106 | case FT32_FLD_CB: |
| 107 | imm = (iword >> FT32_FLD_CB_BIT) & ((1 << FT32_FLD_CB_SIZ) - 1); |
| 108 | fpr(stream, "%d", imm); |
| 109 | break; |
| 110 | case FT32_FLD_R_D: |
| 111 | fpr(stream, "$r%d", (iword >> FT32_FLD_R_D_BIT) & 0x1f); |
| 112 | break; |
| 113 | case FT32_FLD_CR: |
| 114 | imm = (iword >> FT32_FLD_CR_BIT) & ((1 << FT32_FLD_CR_SIZ) - 1); |
| 115 | fpr(stream, "$r%d", 28 + imm); |
| 116 | break; |
| 117 | case FT32_FLD_CV: |
| 118 | imm = (iword >> FT32_FLD_CV_BIT) & ((1 << FT32_FLD_CV_SIZ) - 1); |
| 119 | fpr(stream, "%d", imm); |
| 120 | break; |
| 121 | case FT32_FLD_R_1: |
| 122 | fpr(stream, "$r%d", (iword >> FT32_FLD_R_1_BIT) & 0x1f); |
| 123 | break; |
| 124 | case FT32_FLD_RIMM: |
| 125 | imm = (iword >> FT32_FLD_RIMM_BIT) & ((1 << FT32_FLD_RIMM_SIZ) - 1); |
| 126 | if (imm & 0x400) |
| 127 | fpr(stream, "%d", sign_extend(9, imm)); |
| 128 | else |
| 129 | fpr(stream, "$r%d", imm & 0x1f); |
| 130 | break; |
| 131 | case FT32_FLD_R_2: |
| 132 | fpr(stream, "$r%d", (iword >> FT32_FLD_R_2_BIT) & 0x1f); |
| 133 | break; |
| 134 | case FT32_FLD_K20: |
| 135 | imm = iword & ((1 << FT32_FLD_K20_SIZ) - 1); |
| 136 | fpr(stream, "%d", sign_extend(19, imm)); |
| 137 | break; |
| 138 | case FT32_FLD_PA: |
| 139 | imm = (iword & ((1 << FT32_FLD_PA_SIZ) - 1)) << 2; |
| 140 | info->print_address_func ((bfd_vma) imm, info); |
| 141 | break; |
| 142 | case FT32_FLD_AA: |
| 143 | imm = iword & ((1 << FT32_FLD_AA_SIZ) - 1); |
| 144 | info->print_address_func ((1 << 23) | (bfd_vma) imm, info); |
| 145 | break; |
| 146 | case FT32_FLD_K16: |
| 147 | imm = iword & ((1 << FT32_FLD_K16_SIZ) - 1); |
| 148 | fpr(stream, "%d", imm); |
| 149 | break; |
| 150 | case FT32_FLD_K15: |
| 151 | imm = iword & ((1 << FT32_FLD_K15_SIZ) - 1); |
| 152 | fpr(stream, "%d", sign_extend(14, imm)); |
| 153 | break; |
| 154 | case FT32_FLD_R_D_POST: |
| 155 | fpr(stream, "$r%d", (iword >> FT32_FLD_R_D_BIT) & 0x1f); |
| 156 | break; |
| 157 | case FT32_FLD_R_1_POST: |
| 158 | fpr(stream, "$r%d", (iword >> FT32_FLD_R_1_BIT) & 0x1f); |
| 159 | break; |
| 160 | default: |
| 161 | break; |
| 162 | } |
| 163 | f &= ~lobit; |
| 164 | if (f) |
| 165 | { |
| 166 | fpr(stream, ","); |
| 167 | } |
| 168 | } |
| 169 | } |
| 170 | } |
| 171 | else |
| 172 | { |
| 173 | fpr (stream, "!"); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | int |
| 178 | print_insn_ft32 (bfd_vma addr, struct disassemble_info *info) |
| 179 | { |
| 180 | int status; |
| 181 | stream = info->stream; |
| 182 | bfd_byte buffer[4]; |
| 183 | unsigned int iword; |
| 184 | |
| 185 | fpr = info->fprintf_func; |
| 186 | |
| 187 | if ((status = info->read_memory_func (addr, buffer, 4, info))) |
| 188 | goto fail; |
| 189 | |
| 190 | iword = bfd_getl32 (buffer); |
| 191 | |
| 192 | fpr (stream, "%08x ", iword); |
| 193 | |
| 194 | ft32_opcode(addr, iword, info); |
| 195 | |
| 196 | return 4; |
| 197 | |
| 198 | fail: |
| 199 | info->memory_error_func (status, addr, info); |
| 200 | return -1; |
| 201 | } |