| 1 | /* IQ2000 opcode support. -*- C -*- |
| 2 | |
| 3 | Copyright 2000, 2001, 2002, 2005, 2007, 2009 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 3 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., 51 Franklin Street - Fifth Floor, Boston, |
| 22 | MA 02110-1301, USA. */ |
| 23 | |
| 24 | /* This file is an addendum to iq2000.cpu. Heavy use of C code isn't |
| 25 | appropriate in .cpu files, so it resides here. This especially applies |
| 26 | to assembly/disassembly where parsing/printing can be quite involved. |
| 27 | Such things aren't really part of the specification of the cpu, per se, |
| 28 | so .cpu files provide the general framework and .opc files handle the |
| 29 | nitty-gritty details as necessary. |
| 30 | |
| 31 | Each section is delimited with start and end markers. |
| 32 | |
| 33 | <arch>-opc.h additions use: "-- opc.h" |
| 34 | <arch>-opc.c additions use: "-- opc.c" |
| 35 | <arch>-asm.c additions use: "-- asm.c" |
| 36 | <arch>-dis.c additions use: "-- dis.c" |
| 37 | <arch>-ibd.h additions use: "-- ibd.h". */ |
| 38 | \f |
| 39 | /* -- opc.h */ |
| 40 | |
| 41 | /* Allows reason codes to be output when assembler errors occur. */ |
| 42 | #define CGEN_VERBOSE_ASSEMBLER_ERRORS |
| 43 | |
| 44 | /* Override disassembly hashing - there are variable bits in the top |
| 45 | byte of these instructions. */ |
| 46 | #define CGEN_DIS_HASH_SIZE 8 |
| 47 | #define CGEN_DIS_HASH(buf,value) (((* (unsigned char*) (buf)) >> 6) % CGEN_DIS_HASH_SIZE) |
| 48 | |
| 49 | /* following activates check beyond hashing since some iq2000 and iq10 |
| 50 | instructions have same mnemonics but different functionality. */ |
| 51 | #define CGEN_VALIDATE_INSN_SUPPORTED |
| 52 | |
| 53 | extern int iq2000_cgen_insn_supported (CGEN_CPU_DESC, const CGEN_INSN *); |
| 54 | |
| 55 | /* -- asm.c */ |
| 56 | |
| 57 | #include "safe-ctype.h" |
| 58 | |
| 59 | static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'"); |
| 60 | |
| 61 | /* Special check to ensure that instruction exists for given machine. */ |
| 62 | |
| 63 | int |
| 64 | iq2000_cgen_insn_supported (CGEN_CPU_DESC cd, const CGEN_INSN *insn) |
| 65 | { |
| 66 | int machs = cd->machs; |
| 67 | |
| 68 | return (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_MACH) & machs) != 0; |
| 69 | } |
| 70 | |
| 71 | static int |
| 72 | iq2000_cgen_isa_register (const char **strp) |
| 73 | { |
| 74 | int len; |
| 75 | int ch1, ch2; |
| 76 | |
| 77 | if (**strp == 'r' || **strp == 'R') |
| 78 | { |
| 79 | len = strlen (*strp); |
| 80 | if (len == 2) |
| 81 | { |
| 82 | ch1 = (*strp)[1]; |
| 83 | if ('0' <= ch1 && ch1 <= '9') |
| 84 | return 1; |
| 85 | } |
| 86 | else if (len == 3) |
| 87 | { |
| 88 | ch1 = (*strp)[1]; |
| 89 | ch2 = (*strp)[2]; |
| 90 | if (('1' <= ch1 && ch1 <= '2') && ('0' <= ch2 && ch2 <= '9')) |
| 91 | return 1; |
| 92 | if ('3' == ch1 && (ch2 == '0' || ch2 == '1')) |
| 93 | return 1; |
| 94 | } |
| 95 | } |
| 96 | if (**strp == '%' |
| 97 | && TOLOWER ((*strp)[1]) != 'l' |
| 98 | && TOLOWER ((*strp)[1]) != 'h') |
| 99 | return 1; |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | /* Handle negated literal. */ |
| 104 | |
| 105 | static const char * |
| 106 | parse_mimm (CGEN_CPU_DESC cd, |
| 107 | const char **strp, |
| 108 | int opindex, |
| 109 | unsigned long *valuep) |
| 110 | { |
| 111 | const char *errmsg; |
| 112 | |
| 113 | /* Verify this isn't a register. */ |
| 114 | if (iq2000_cgen_isa_register (strp)) |
| 115 | errmsg = _("immediate value cannot be register"); |
| 116 | else |
| 117 | { |
| 118 | long value; |
| 119 | |
| 120 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value); |
| 121 | if (errmsg == NULL) |
| 122 | { |
| 123 | long x = (-value) & 0xFFFF0000; |
| 124 | |
| 125 | if (x != 0 && x != (long) 0xFFFF0000) |
| 126 | errmsg = _("immediate value out of range"); |
| 127 | else |
| 128 | *valuep = (-value & 0xFFFF); |
| 129 | } |
| 130 | } |
| 131 | return errmsg; |
| 132 | } |
| 133 | |
| 134 | /* Handle signed/unsigned literal. */ |
| 135 | |
| 136 | static const char * |
| 137 | parse_imm (CGEN_CPU_DESC cd, |
| 138 | const char **strp, |
| 139 | int opindex, |
| 140 | unsigned long *valuep) |
| 141 | { |
| 142 | const char *errmsg; |
| 143 | |
| 144 | if (iq2000_cgen_isa_register (strp)) |
| 145 | errmsg = _("immediate value cannot be register"); |
| 146 | else |
| 147 | { |
| 148 | long value; |
| 149 | |
| 150 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value); |
| 151 | if (errmsg == NULL) |
| 152 | { |
| 153 | long x = value & 0xFFFF0000; |
| 154 | |
| 155 | if (x != 0 && x != (long) 0xFFFF0000) |
| 156 | errmsg = _("immediate value out of range"); |
| 157 | else |
| 158 | *valuep = (value & 0xFFFF); |
| 159 | } |
| 160 | } |
| 161 | return errmsg; |
| 162 | } |
| 163 | |
| 164 | /* Handle iq10 21-bit jmp offset. */ |
| 165 | |
| 166 | static const char * |
| 167 | parse_jtargq10 (CGEN_CPU_DESC cd, |
| 168 | const char **strp, |
| 169 | int opindex, |
| 170 | int reloc ATTRIBUTE_UNUSED, |
| 171 | enum cgen_parse_operand_result *type_addr ATTRIBUTE_UNUSED, |
| 172 | bfd_vma *valuep) |
| 173 | { |
| 174 | const char *errmsg; |
| 175 | bfd_vma value; |
| 176 | enum cgen_parse_operand_result result_type = CGEN_PARSE_OPERAND_RESULT_NUMBER; |
| 177 | |
| 178 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_OFFSET_21, |
| 179 | & result_type, & value); |
| 180 | if (errmsg == NULL && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 181 | { |
| 182 | /* Check value is within 23-bits |
| 183 | (remembering that 2-bit shift right will occur). */ |
| 184 | if (value > 0x7fffff) |
| 185 | return _("21-bit offset out of range"); |
| 186 | } |
| 187 | *valuep = (value & 0x7FFFFF); |
| 188 | return errmsg; |
| 189 | } |
| 190 | |
| 191 | /* Handle high(). */ |
| 192 | |
| 193 | static const char * |
| 194 | parse_hi16 (CGEN_CPU_DESC cd, |
| 195 | const char **strp, |
| 196 | int opindex, |
| 197 | unsigned long *valuep) |
| 198 | { |
| 199 | if (strncasecmp (*strp, "%hi(", 4) == 0) |
| 200 | { |
| 201 | enum cgen_parse_operand_result result_type; |
| 202 | bfd_vma value; |
| 203 | const char *errmsg; |
| 204 | |
| 205 | *strp += 4; |
| 206 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16, |
| 207 | & result_type, & value); |
| 208 | if (**strp != ')') |
| 209 | return MISSING_CLOSING_PARENTHESIS; |
| 210 | |
| 211 | ++*strp; |
| 212 | if (errmsg == NULL |
| 213 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 214 | { |
| 215 | /* If value has top-bit of %lo on, then it will |
| 216 | sign-propagate and so we compensate by adding |
| 217 | 1 to the resultant %hi value. */ |
| 218 | if (value & 0x8000) |
| 219 | value += 0x10000; |
| 220 | value >>= 16; |
| 221 | value &= 0xffff; |
| 222 | } |
| 223 | *valuep = value; |
| 224 | |
| 225 | return errmsg; |
| 226 | } |
| 227 | |
| 228 | /* We add %uhi in case a user just wants the high 16-bits or is using |
| 229 | an insn like ori for %lo which does not sign-propagate. */ |
| 230 | if (strncasecmp (*strp, "%uhi(", 5) == 0) |
| 231 | { |
| 232 | enum cgen_parse_operand_result result_type; |
| 233 | bfd_vma value; |
| 234 | const char *errmsg; |
| 235 | |
| 236 | *strp += 5; |
| 237 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_UHI16, |
| 238 | & result_type, & value); |
| 239 | if (**strp != ')') |
| 240 | return MISSING_CLOSING_PARENTHESIS; |
| 241 | |
| 242 | ++*strp; |
| 243 | if (errmsg == NULL |
| 244 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 245 | value >>= 16; |
| 246 | |
| 247 | value &= 0xffff; |
| 248 | *valuep = value; |
| 249 | |
| 250 | return errmsg; |
| 251 | } |
| 252 | |
| 253 | return parse_imm (cd, strp, opindex, valuep); |
| 254 | } |
| 255 | |
| 256 | /* Handle %lo in a signed context. |
| 257 | The signedness of the value doesn't matter to %lo(), but this also |
| 258 | handles the case where %lo() isn't present. */ |
| 259 | |
| 260 | static const char * |
| 261 | parse_lo16 (CGEN_CPU_DESC cd, |
| 262 | const char **strp, |
| 263 | int opindex, |
| 264 | unsigned long *valuep) |
| 265 | { |
| 266 | if (strncasecmp (*strp, "%lo(", 4) == 0) |
| 267 | { |
| 268 | const char *errmsg; |
| 269 | enum cgen_parse_operand_result result_type; |
| 270 | bfd_vma value; |
| 271 | |
| 272 | *strp += 4; |
| 273 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, |
| 274 | & result_type, & value); |
| 275 | if (**strp != ')') |
| 276 | return MISSING_CLOSING_PARENTHESIS; |
| 277 | ++*strp; |
| 278 | if (errmsg == NULL |
| 279 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 280 | value &= 0xffff; |
| 281 | *valuep = value; |
| 282 | return errmsg; |
| 283 | } |
| 284 | |
| 285 | return parse_imm (cd, strp, opindex, valuep); |
| 286 | } |
| 287 | |
| 288 | /* Handle %lo in a negated signed context. |
| 289 | The signedness of the value doesn't matter to %lo(), but this also |
| 290 | handles the case where %lo() isn't present. */ |
| 291 | |
| 292 | static const char * |
| 293 | parse_mlo16 (CGEN_CPU_DESC cd, |
| 294 | const char **strp, |
| 295 | int opindex, |
| 296 | unsigned long *valuep) |
| 297 | { |
| 298 | if (strncasecmp (*strp, "%lo(", 4) == 0) |
| 299 | { |
| 300 | const char *errmsg; |
| 301 | enum cgen_parse_operand_result result_type; |
| 302 | bfd_vma value; |
| 303 | |
| 304 | *strp += 4; |
| 305 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, |
| 306 | & result_type, & value); |
| 307 | if (**strp != ')') |
| 308 | return MISSING_CLOSING_PARENTHESIS; |
| 309 | ++*strp; |
| 310 | if (errmsg == NULL |
| 311 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 312 | value = (-value) & 0xffff; |
| 313 | *valuep = value; |
| 314 | return errmsg; |
| 315 | } |
| 316 | |
| 317 | return parse_mimm (cd, strp, opindex, valuep); |
| 318 | } |
| 319 | |
| 320 | /* -- */ |