| 1 | /* IQ2000 opcode support. -*- C -*- |
| 2 | |
| 3 | Copyright 2000, 2001, 2002 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Red Hat Inc; developed under contract from Fujitsu. |
| 6 | |
| 7 | This file is part of the GNU Binutils. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 22 | |
| 23 | */ |
| 24 | |
| 25 | /* This file is an addendum to iq2000.cpu. Heavy use of C code isn't |
| 26 | appropriate in .cpu files, so it resides here. This especially applies |
| 27 | to assembly/disassembly where parsing/printing can be quite involved. |
| 28 | Such things aren't really part of the specification of the cpu, per se, |
| 29 | so .cpu files provide the general framework and .opc files handle the |
| 30 | nitty-gritty details as necessary. |
| 31 | |
| 32 | Each section is delimited with start and end markers. |
| 33 | |
| 34 | <arch>-opc.h additions use: "-- opc.h" |
| 35 | <arch>-opc.c additions use: "-- opc.c" |
| 36 | <arch>-asm.c additions use: "-- asm.c" |
| 37 | <arch>-dis.c additions use: "-- dis.c" |
| 38 | <arch>-ibd.h additions use: "-- ibd.h" |
| 39 | */ |
| 40 | \f |
| 41 | /* -- opc.h */ |
| 42 | |
| 43 | /* Allows reason codes to be output when assembler errors occur. */ |
| 44 | #define CGEN_VERBOSE_ASSEMBLER_ERRORS |
| 45 | |
| 46 | /* Override disassembly hashing - there are variable bits in the top |
| 47 | byte of these instructions. */ |
| 48 | #define CGEN_DIS_HASH_SIZE 8 |
| 49 | #define CGEN_DIS_HASH(buf,value) (((* (unsigned char*) (buf)) >> 6) % CGEN_DIS_HASH_SIZE) |
| 50 | |
| 51 | /* following activates check beyond hashing since some iq2000 and iq10 |
| 52 | instructions have same mnemonics but different functionality. */ |
| 53 | #define CGEN_VALIDATE_INSN_SUPPORTED |
| 54 | |
| 55 | extern int iq2000_cgen_insn_supported (CGEN_CPU_DESC cd, const CGEN_INSN *insn); |
| 56 | |
| 57 | /* -- asm.c */ |
| 58 | static const char * parse_mimm PARAMS ((CGEN_CPU_DESC, const char **, int, long *)); |
| 59 | static const char * parse_imm PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); |
| 60 | static const char * parse_hi16 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); |
| 61 | static const char * parse_lo16 PARAMS ((CGEN_CPU_DESC, const char **, int, long *)); |
| 62 | |
| 63 | /* Special check to ensure that instruction exists for given machine. */ |
| 64 | int |
| 65 | iq2000_cgen_insn_supported (cd, insn) |
| 66 | CGEN_CPU_DESC cd; |
| 67 | const CGEN_INSN *insn; |
| 68 | { |
| 69 | int machs = cd->machs; |
| 70 | |
| 71 | return ((CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_MACH) & machs) != 0); |
| 72 | } |
| 73 | |
| 74 | static int iq2000_cgen_isa_register (strp) |
| 75 | const char **strp; |
| 76 | { |
| 77 | int len; |
| 78 | int ch1, ch2; |
| 79 | if (**strp == 'r' || **strp == 'R') |
| 80 | { |
| 81 | len = strlen (*strp); |
| 82 | if (len == 2) |
| 83 | { |
| 84 | ch1 = (*strp)[1]; |
| 85 | if ('0' <= ch1 && ch1 <= '9') |
| 86 | return 1; |
| 87 | } |
| 88 | else if (len == 3) |
| 89 | { |
| 90 | ch1 = (*strp)[1]; |
| 91 | ch2 = (*strp)[2]; |
| 92 | if (('1' <= ch1 && ch1 <= '2') && ('0' <= ch2 && ch2 <= '9')) |
| 93 | return 1; |
| 94 | if ('3' == ch1 && (ch2 == '0' || ch2 == '1')) |
| 95 | return 1; |
| 96 | } |
| 97 | } |
| 98 | if (**strp == '%' && tolower((*strp)[1]) != 'l' && tolower((*strp)[1]) != 'h') |
| 99 | return 1; |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | /* Handle negated literal. */ |
| 104 | |
| 105 | static const char * |
| 106 | parse_mimm (cd, strp, opindex, valuep) |
| 107 | CGEN_CPU_DESC cd; |
| 108 | const char **strp; |
| 109 | int opindex; |
| 110 | long *valuep; |
| 111 | { |
| 112 | const char *errmsg; |
| 113 | long value; |
| 114 | |
| 115 | /* Verify this isn't a register */ |
| 116 | if (iq2000_cgen_isa_register (strp)) |
| 117 | errmsg = _("immediate value cannot be register"); |
| 118 | else |
| 119 | { |
| 120 | long value; |
| 121 | |
| 122 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value); |
| 123 | if (errmsg == NULL) |
| 124 | { |
| 125 | long x = (-value) & 0xFFFF0000; |
| 126 | if (x != 0 && x != 0xFFFF0000) |
| 127 | errmsg = _("immediate value out of range"); |
| 128 | else |
| 129 | *valuep = (-value & 0xFFFF); |
| 130 | } |
| 131 | } |
| 132 | return errmsg; |
| 133 | } |
| 134 | |
| 135 | /* Handle signed/unsigned literal. */ |
| 136 | |
| 137 | static const char * |
| 138 | parse_imm (cd, strp, opindex, valuep) |
| 139 | CGEN_CPU_DESC cd; |
| 140 | const char **strp; |
| 141 | int opindex; |
| 142 | unsigned long *valuep; |
| 143 | { |
| 144 | const char *errmsg; |
| 145 | long value; |
| 146 | |
| 147 | if (iq2000_cgen_isa_register (strp)) |
| 148 | errmsg = _("immediate value cannot be register"); |
| 149 | else |
| 150 | { |
| 151 | long value; |
| 152 | |
| 153 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value); |
| 154 | if (errmsg == NULL) |
| 155 | { |
| 156 | long x = value & 0xFFFF0000; |
| 157 | if (x != 0 && x != 0xFFFF0000) |
| 158 | errmsg = _("immediate value out of range"); |
| 159 | else |
| 160 | *valuep = (value & 0xFFFF); |
| 161 | } |
| 162 | } |
| 163 | return errmsg; |
| 164 | } |
| 165 | |
| 166 | /* Handle iq10 21-bit jmp offset. */ |
| 167 | |
| 168 | static const char * |
| 169 | parse_jtargq10 (cd, strp, opindex, reloc, type_addr, valuep) |
| 170 | CGEN_CPU_DESC cd; |
| 171 | const char **strp; |
| 172 | int opindex; |
| 173 | int reloc; |
| 174 | enum cgen_parse_operand_result *type_addr; |
| 175 | unsigned long *valuep; |
| 176 | { |
| 177 | const char *errmsg; |
| 178 | bfd_vma value; |
| 179 | enum cgen_parse_operand_result result_type = CGEN_PARSE_OPERAND_RESULT_NUMBER; |
| 180 | |
| 181 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_OFFSET_21, |
| 182 | &result_type, &value); |
| 183 | if (errmsg == NULL && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 184 | { |
| 185 | /* check value is within 23-bits (remembering that 2-bit shift right will occur) */ |
| 186 | if (value > 0x7fffff) |
| 187 | return _("21-bit offset out of range"); |
| 188 | } |
| 189 | *valuep = (value & 0x7FFFFF); |
| 190 | return errmsg; |
| 191 | } |
| 192 | |
| 193 | /* Handle high(). */ |
| 194 | |
| 195 | static const char * |
| 196 | parse_hi16 (cd, strp, opindex, valuep) |
| 197 | CGEN_CPU_DESC cd; |
| 198 | const char **strp; |
| 199 | int opindex; |
| 200 | unsigned long *valuep; |
| 201 | { |
| 202 | if (strncasecmp (*strp, "%hi(", 4) == 0) |
| 203 | { |
| 204 | enum cgen_parse_operand_result result_type; |
| 205 | bfd_vma value; |
| 206 | const char *errmsg; |
| 207 | |
| 208 | *strp += 4; |
| 209 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16, |
| 210 | &result_type, &value); |
| 211 | if (**strp != ')') |
| 212 | return _("missing `)'"); |
| 213 | |
| 214 | ++*strp; |
| 215 | if (errmsg == NULL |
| 216 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 217 | { |
| 218 | /* if value has top-bit of %lo on, then it will |
| 219 | sign-propagate and so we compensate by adding |
| 220 | 1 to the resultant %hi value */ |
| 221 | if (value & 0x8000) |
| 222 | value += 0x10000; |
| 223 | value >>= 16; |
| 224 | } |
| 225 | *valuep = value; |
| 226 | |
| 227 | return errmsg; |
| 228 | } |
| 229 | |
| 230 | /* we add %uhi in case a user just wants the high 16-bits or is using |
| 231 | an insn like ori for %lo which does not sign-propagate */ |
| 232 | if (strncasecmp (*strp, "%uhi(", 5) == 0) |
| 233 | { |
| 234 | enum cgen_parse_operand_result result_type; |
| 235 | bfd_vma value; |
| 236 | const char *errmsg; |
| 237 | |
| 238 | *strp += 5; |
| 239 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_UHI16, |
| 240 | &result_type, &value); |
| 241 | if (**strp != ')') |
| 242 | return _("missing `)'"); |
| 243 | |
| 244 | ++*strp; |
| 245 | if (errmsg == NULL |
| 246 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 247 | { |
| 248 | value >>= 16; |
| 249 | } |
| 250 | *valuep = value; |
| 251 | |
| 252 | return errmsg; |
| 253 | } |
| 254 | |
| 255 | return parse_imm (cd, strp, opindex, valuep); |
| 256 | } |
| 257 | |
| 258 | /* Handle %lo in a signed context. |
| 259 | The signedness of the value doesn't matter to %lo(), but this also |
| 260 | handles the case where %lo() isn't present. */ |
| 261 | |
| 262 | static const char * |
| 263 | parse_lo16 (cd, strp, opindex, valuep) |
| 264 | CGEN_CPU_DESC cd; |
| 265 | const char **strp; |
| 266 | int opindex; |
| 267 | long *valuep; |
| 268 | { |
| 269 | if (strncasecmp (*strp, "%lo(", 4) == 0) |
| 270 | { |
| 271 | const char *errmsg; |
| 272 | enum cgen_parse_operand_result result_type; |
| 273 | bfd_vma value; |
| 274 | |
| 275 | *strp += 4; |
| 276 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, |
| 277 | &result_type, &value); |
| 278 | if (**strp != ')') |
| 279 | return _("missing `)'"); |
| 280 | ++*strp; |
| 281 | if (errmsg == NULL |
| 282 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 283 | value &= 0xffff; |
| 284 | *valuep = value; |
| 285 | return errmsg; |
| 286 | } |
| 287 | |
| 288 | return parse_imm (cd, strp, opindex, valuep); |
| 289 | } |
| 290 | |
| 291 | /* Handle %lo in a negated signed context. |
| 292 | The signedness of the value doesn't matter to %lo(), but this also |
| 293 | handles the case where %lo() isn't present. */ |
| 294 | |
| 295 | static const char * |
| 296 | parse_mlo16 (cd, strp, opindex, valuep) |
| 297 | CGEN_CPU_DESC cd; |
| 298 | const char **strp; |
| 299 | int opindex; |
| 300 | long *valuep; |
| 301 | { |
| 302 | if (strncasecmp (*strp, "%lo(", 4) == 0) |
| 303 | { |
| 304 | const char *errmsg; |
| 305 | enum cgen_parse_operand_result result_type; |
| 306 | bfd_vma value; |
| 307 | |
| 308 | *strp += 4; |
| 309 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, |
| 310 | &result_type, &value); |
| 311 | if (**strp != ')') |
| 312 | return _("missing `)'"); |
| 313 | ++*strp; |
| 314 | if (errmsg == NULL |
| 315 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 316 | value = (-value) & 0xffff; |
| 317 | *valuep = value; |
| 318 | return errmsg; |
| 319 | } |
| 320 | |
| 321 | return parse_mimm (cd, strp, opindex, valuep); |
| 322 | } |
| 323 | |
| 324 | /* -- */ |