| 1 | /* M32R opcode support. -*- C -*- |
| 2 | |
| 3 | Copyright 1998, 1999, 2000, 2001, 2004, 2005, 2007, 2009 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | Contributed by Red Hat Inc; developed under contract from |
| 7 | Mitsubishi Electric Corporation. |
| 8 | |
| 9 | This file is part of the GNU Binutils. |
| 10 | |
| 11 | This program is free software; you can redistribute it and/or modify |
| 12 | it under the terms of the GNU General Public License as published by |
| 13 | the Free Software Foundation; either version 3 of the License, or |
| 14 | (at your option) any later version. |
| 15 | |
| 16 | This program is distributed in the hope that it will be useful, |
| 17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | GNU General Public License for more details. |
| 20 | |
| 21 | You should have received a copy of the GNU General Public License |
| 22 | along with this program; if not, write to the Free Software |
| 23 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 24 | MA 02110-1301, USA. */ |
| 25 | |
| 26 | |
| 27 | /* This file is an addendum to m32r.cpu. Heavy use of C code isn't |
| 28 | appropriate in .cpu files, so it resides here. This especially applies |
| 29 | to assembly/disassembly where parsing/printing can be quite involved. |
| 30 | Such things aren't really part of the specification of the cpu, per se, |
| 31 | so .cpu files provide the general framework and .opc files handle the |
| 32 | nitty-gritty details as necessary. |
| 33 | |
| 34 | Each section is delimited with start and end markers. |
| 35 | |
| 36 | <arch>-opc.h additions use: "-- opc.h" |
| 37 | <arch>-opc.c additions use: "-- opc.c" |
| 38 | <arch>-asm.c additions use: "-- asm.c" |
| 39 | <arch>-dis.c additions use: "-- dis.c" |
| 40 | <arch>-ibd.h additions use: "-- ibd.h" */ |
| 41 | \f |
| 42 | /* -- opc.h */ |
| 43 | |
| 44 | #undef CGEN_DIS_HASH_SIZE |
| 45 | #define CGEN_DIS_HASH_SIZE 256 |
| 46 | #undef CGEN_DIS_HASH |
| 47 | #if 0 |
| 48 | #define X(b) (((unsigned char *) (b))[0] & 0xf0) |
| 49 | #define CGEN_DIS_HASH(buffer, value) \ |
| 50 | (X (buffer) | \ |
| 51 | (X (buffer) == 0x40 || X (buffer) == 0xe0 || X (buffer) == 0x60 || X (buffer) == 0x50 ? 0 \ |
| 52 | : X (buffer) == 0x70 || X (buffer) == 0xf0 ? (((unsigned char *) (buffer))[0] & 0xf) \ |
| 53 | : X (buffer) == 0x30 ? ((((unsigned char *) (buffer))[1] & 0x70) >> 4) \ |
| 54 | : ((((unsigned char *) (buffer))[1] & 0xf0) >> 4))) |
| 55 | #else |
| 56 | #define CGEN_DIS_HASH(buffer, value) m32r_cgen_dis_hash (buffer, value) |
| 57 | extern unsigned int m32r_cgen_dis_hash (const char *, CGEN_INSN_INT); |
| 58 | #endif |
| 59 | |
| 60 | /* -- */ |
| 61 | \f |
| 62 | /* -- opc.c */ |
| 63 | unsigned int |
| 64 | m32r_cgen_dis_hash (const char * buf ATTRIBUTE_UNUSED, CGEN_INSN_INT value) |
| 65 | { |
| 66 | unsigned int x; |
| 67 | |
| 68 | if (value & 0xffff0000) /* 32bit instructions. */ |
| 69 | value = (value >> 16) & 0xffff; |
| 70 | |
| 71 | x = (value >> 8) & 0xf0; |
| 72 | if (x == 0x40 || x == 0xe0 || x == 0x60 || x == 0x50) |
| 73 | return x; |
| 74 | |
| 75 | if (x == 0x70 || x == 0xf0) |
| 76 | return x | ((value >> 8) & 0x0f); |
| 77 | |
| 78 | if (x == 0x30) |
| 79 | return x | ((value & 0x70) >> 4); |
| 80 | else |
| 81 | return x | ((value & 0xf0) >> 4); |
| 82 | } |
| 83 | |
| 84 | /* -- */ |
| 85 | \f |
| 86 | /* -- asm.c */ |
| 87 | static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'"); |
| 88 | |
| 89 | /* Handle '#' prefixes (i.e. skip over them). */ |
| 90 | |
| 91 | static const char * |
| 92 | parse_hash (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, |
| 93 | const char **strp, |
| 94 | int opindex ATTRIBUTE_UNUSED, |
| 95 | long *valuep ATTRIBUTE_UNUSED) |
| 96 | { |
| 97 | if (**strp == '#') |
| 98 | ++*strp; |
| 99 | return NULL; |
| 100 | } |
| 101 | |
| 102 | /* Handle shigh(), high(). */ |
| 103 | |
| 104 | static const char * |
| 105 | parse_hi16 (CGEN_CPU_DESC cd, |
| 106 | const char **strp, |
| 107 | int opindex, |
| 108 | unsigned long *valuep) |
| 109 | { |
| 110 | const char *errmsg; |
| 111 | enum cgen_parse_operand_result result_type; |
| 112 | bfd_vma value; |
| 113 | |
| 114 | if (**strp == '#') |
| 115 | ++*strp; |
| 116 | |
| 117 | if (strncasecmp (*strp, "high(", 5) == 0) |
| 118 | { |
| 119 | *strp += 5; |
| 120 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_ULO, |
| 121 | & result_type, & value); |
| 122 | if (**strp != ')') |
| 123 | return MISSING_CLOSING_PARENTHESIS; |
| 124 | ++*strp; |
| 125 | if (errmsg == NULL |
| 126 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 127 | { |
| 128 | value >>= 16; |
| 129 | value &= 0xffff; |
| 130 | } |
| 131 | *valuep = value; |
| 132 | return errmsg; |
| 133 | } |
| 134 | else if (strncasecmp (*strp, "shigh(", 6) == 0) |
| 135 | { |
| 136 | *strp += 6; |
| 137 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_SLO, |
| 138 | & result_type, & value); |
| 139 | if (**strp != ')') |
| 140 | return MISSING_CLOSING_PARENTHESIS; |
| 141 | ++*strp; |
| 142 | if (errmsg == NULL |
| 143 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 144 | { |
| 145 | value += 0x8000; |
| 146 | value >>= 16; |
| 147 | value &= 0xffff; |
| 148 | } |
| 149 | *valuep = value; |
| 150 | return errmsg; |
| 151 | } |
| 152 | |
| 153 | return cgen_parse_unsigned_integer (cd, strp, opindex, valuep); |
| 154 | } |
| 155 | |
| 156 | /* Handle low() in a signed context. Also handle sda(). |
| 157 | The signedness of the value doesn't matter to low(), but this also |
| 158 | handles the case where low() isn't present. */ |
| 159 | |
| 160 | static const char * |
| 161 | parse_slo16 (CGEN_CPU_DESC cd, |
| 162 | const char ** strp, |
| 163 | int opindex, |
| 164 | long * valuep) |
| 165 | { |
| 166 | const char *errmsg; |
| 167 | enum cgen_parse_operand_result result_type; |
| 168 | bfd_vma value; |
| 169 | |
| 170 | if (**strp == '#') |
| 171 | ++*strp; |
| 172 | |
| 173 | if (strncasecmp (*strp, "low(", 4) == 0) |
| 174 | { |
| 175 | *strp += 4; |
| 176 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16, |
| 177 | & result_type, & value); |
| 178 | if (**strp != ')') |
| 179 | return MISSING_CLOSING_PARENTHESIS; |
| 180 | ++*strp; |
| 181 | if (errmsg == NULL |
| 182 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 183 | value = ((value & 0xffff) ^ 0x8000) - 0x8000; |
| 184 | *valuep = value; |
| 185 | return errmsg; |
| 186 | } |
| 187 | |
| 188 | if (strncasecmp (*strp, "sda(", 4) == 0) |
| 189 | { |
| 190 | *strp += 4; |
| 191 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_SDA16, |
| 192 | NULL, & value); |
| 193 | if (**strp != ')') |
| 194 | return MISSING_CLOSING_PARENTHESIS; |
| 195 | ++*strp; |
| 196 | *valuep = value; |
| 197 | return errmsg; |
| 198 | } |
| 199 | |
| 200 | return cgen_parse_signed_integer (cd, strp, opindex, valuep); |
| 201 | } |
| 202 | |
| 203 | /* Handle low() in an unsigned context. |
| 204 | The signedness of the value doesn't matter to low(), but this also |
| 205 | handles the case where low() isn't present. */ |
| 206 | |
| 207 | static const char * |
| 208 | parse_ulo16 (CGEN_CPU_DESC cd, |
| 209 | const char **strp, |
| 210 | int opindex, |
| 211 | unsigned long *valuep) |
| 212 | { |
| 213 | const char *errmsg; |
| 214 | enum cgen_parse_operand_result result_type; |
| 215 | bfd_vma value; |
| 216 | |
| 217 | if (**strp == '#') |
| 218 | ++*strp; |
| 219 | |
| 220 | if (strncasecmp (*strp, "low(", 4) == 0) |
| 221 | { |
| 222 | *strp += 4; |
| 223 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16, |
| 224 | & result_type, & value); |
| 225 | if (**strp != ')') |
| 226 | return MISSING_CLOSING_PARENTHESIS; |
| 227 | ++*strp; |
| 228 | if (errmsg == NULL |
| 229 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 230 | value &= 0xffff; |
| 231 | *valuep = value; |
| 232 | return errmsg; |
| 233 | } |
| 234 | |
| 235 | return cgen_parse_unsigned_integer (cd, strp, opindex, valuep); |
| 236 | } |
| 237 | |
| 238 | /* -- */ |
| 239 | \f |
| 240 | /* -- dis.c */ |
| 241 | |
| 242 | /* Print signed operands with '#' prefixes. */ |
| 243 | |
| 244 | static void |
| 245 | print_signed_with_hash_prefix (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, |
| 246 | void * dis_info, |
| 247 | long value, |
| 248 | unsigned int attrs ATTRIBUTE_UNUSED, |
| 249 | bfd_vma pc ATTRIBUTE_UNUSED, |
| 250 | int length ATTRIBUTE_UNUSED) |
| 251 | { |
| 252 | disassemble_info *info = (disassemble_info *) dis_info; |
| 253 | |
| 254 | (*info->fprintf_func) (info->stream, "#"); |
| 255 | (*info->fprintf_func) (info->stream, "%ld", value); |
| 256 | } |
| 257 | |
| 258 | /* Print unsigned operands with '#' prefixes. */ |
| 259 | |
| 260 | static void |
| 261 | print_unsigned_with_hash_prefix (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, |
| 262 | void * dis_info, |
| 263 | long value, |
| 264 | unsigned int attrs ATTRIBUTE_UNUSED, |
| 265 | bfd_vma pc ATTRIBUTE_UNUSED, |
| 266 | int length ATTRIBUTE_UNUSED) |
| 267 | { |
| 268 | disassemble_info *info = (disassemble_info *) dis_info; |
| 269 | |
| 270 | (*info->fprintf_func) (info->stream, "#"); |
| 271 | (*info->fprintf_func) (info->stream, "0x%lx", value); |
| 272 | } |
| 273 | |
| 274 | /* Handle '#' prefixes as operands. */ |
| 275 | |
| 276 | static void |
| 277 | print_hash (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, |
| 278 | void * dis_info, |
| 279 | long value ATTRIBUTE_UNUSED, |
| 280 | unsigned int attrs ATTRIBUTE_UNUSED, |
| 281 | bfd_vma pc ATTRIBUTE_UNUSED, |
| 282 | int length ATTRIBUTE_UNUSED) |
| 283 | { |
| 284 | disassemble_info *info = (disassemble_info *) dis_info; |
| 285 | |
| 286 | (*info->fprintf_func) (info->stream, "#"); |
| 287 | } |
| 288 | |
| 289 | #undef CGEN_PRINT_INSN |
| 290 | #define CGEN_PRINT_INSN my_print_insn |
| 291 | |
| 292 | static int |
| 293 | my_print_insn (CGEN_CPU_DESC cd, |
| 294 | bfd_vma pc, |
| 295 | disassemble_info *info) |
| 296 | { |
| 297 | bfd_byte buffer[CGEN_MAX_INSN_SIZE]; |
| 298 | bfd_byte *buf = buffer; |
| 299 | int status; |
| 300 | int buflen = (pc & 3) == 0 ? 4 : 2; |
| 301 | int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG; |
| 302 | bfd_byte *x; |
| 303 | |
| 304 | /* Read the base part of the insn. */ |
| 305 | |
| 306 | status = (*info->read_memory_func) (pc - ((!big_p && (pc & 3) != 0) ? 2 : 0), |
| 307 | buf, buflen, info); |
| 308 | if (status != 0) |
| 309 | { |
| 310 | (*info->memory_error_func) (status, pc, info); |
| 311 | return -1; |
| 312 | } |
| 313 | |
| 314 | /* 32 bit insn? */ |
| 315 | x = (big_p ? &buf[0] : &buf[3]); |
| 316 | if ((pc & 3) == 0 && (*x & 0x80) != 0) |
| 317 | return print_insn (cd, pc, info, buf, buflen); |
| 318 | |
| 319 | /* Print the first insn. */ |
| 320 | if ((pc & 3) == 0) |
| 321 | { |
| 322 | buf += (big_p ? 0 : 2); |
| 323 | if (print_insn (cd, pc, info, buf, 2) == 0) |
| 324 | (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); |
| 325 | buf += (big_p ? 2 : -2); |
| 326 | } |
| 327 | |
| 328 | x = (big_p ? &buf[0] : &buf[1]); |
| 329 | if (*x & 0x80) |
| 330 | { |
| 331 | /* Parallel. */ |
| 332 | (*info->fprintf_func) (info->stream, " || "); |
| 333 | *x &= 0x7f; |
| 334 | } |
| 335 | else |
| 336 | (*info->fprintf_func) (info->stream, " -> "); |
| 337 | |
| 338 | /* The "& 3" is to pass a consistent address. |
| 339 | Parallel insns arguably both begin on the word boundary. |
| 340 | Also, branch insns are calculated relative to the word boundary. */ |
| 341 | if (print_insn (cd, pc & ~ (bfd_vma) 3, info, buf, 2) == 0) |
| 342 | (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); |
| 343 | |
| 344 | return (pc & 3) ? 2 : 4; |
| 345 | } |
| 346 | |
| 347 | /* -- */ |