bfd/cpu-ia64-opc.c

   1 /* Copyright 1998, 1999, 2000, 2001, 2002, 2003
   2    Free Software Foundation, Inc.
   3    Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   7 This program 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 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public 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, MA 02110-1301, USA.  */
  20
  21 /* Logically, this code should be part of libopcode but since some of
  22    the operand insertion/extraction functions help bfd to implement
  23    relocations, this code is included as part of cpu-ia64.c.  This
  24    avoids circular dependencies between libopcode and libbfd and also
  25    obviates the need for applications to link in libopcode when all
  26    they really want is libbfd.
  27
  28    --davidm Mon Apr 13 22:14:02 1998 */
  29
  30 #include "../opcodes/ia64-opc.h"
  31
  32 #define NELEMS(a)  ((int) (sizeof (a) / sizeof ((a)[0])))
  33
  34 static const char*
  35 ins_rsvd (const struct ia64_operand *self ATTRIBUTE_UNUSED,
  36           ia64_insn value ATTRIBUTE_UNUSED, ia64_insn *code ATTRIBUTE_UNUSED)
  37 {
  38   return "internal error---this shouldn't happen";
  39 }
  40
  41 static const char*
  42 ext_rsvd (const struct ia64_operand *self ATTRIBUTE_UNUSED,
  43           ia64_insn code ATTRIBUTE_UNUSED, ia64_insn *valuep ATTRIBUTE_UNUSED)
  44 {
  45   return "internal error---this shouldn't happen";
  46 }
  47
  48 static const char*
  49 ins_const (const struct ia64_operand *self ATTRIBUTE_UNUSED,
  50            ia64_insn value ATTRIBUTE_UNUSED, ia64_insn *code ATTRIBUTE_UNUSED)
  51 {
  52   return 0;
  53 }
  54
  55 static const char*
  56 ext_const (const struct ia64_operand *self ATTRIBUTE_UNUSED,
  57            ia64_insn code ATTRIBUTE_UNUSED, ia64_insn *valuep ATTRIBUTE_UNUSED)
  58 {
  59   return 0;
  60 }
  61
  62 static const char*
  63 ins_reg (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
  64 {
  65   if (value >= 1u << self->field[0].bits)
  66     return "register number out of range";
  67
  68   *code |= value << self->field[0].shift;
  69   return 0;
  70 }
  71
  72 static const char*
  73 ext_reg (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
  74 {
  75   *valuep = ((code >> self->field[0].shift)
  76              & ((1u << self->field[0].bits) - 1));
  77   return 0;
  78 }
  79
  80 static const char*
  81 ins_immu (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
  82 {
  83   ia64_insn new = 0;
  84   int i;
  85
  86   for (i = 0; i < NELEMS (self->field) && self->field[i].bits; ++i)
  87     {
  88       new |= ((value & ((((ia64_insn) 1) << self->field[i].bits) - 1))
  89               << self->field[i].shift);
  90       value >>= self->field[i].bits;
  91     }
  92   if (value)
  93     return "integer operand out of range";
  94
  95   *code |= new;
  96   return 0;
  97 }
  98
  99 static const char*
 100 ext_immu (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 101 {
 102   BFD_HOST_U_64_BIT value = 0;
 103   int i, bits = 0, total = 0;
 104
 105   for (i = 0; i < NELEMS (self->field) && self->field[i].bits; ++i)
 106     {
 107       bits = self->field[i].bits;
 108       value |= ((code >> self->field[i].shift)
 109                 & ((((BFD_HOST_U_64_BIT) 1) << bits) - 1)) << total;
 110       total += bits;
 111     }
 112   *valuep = value;
 113   return 0;
 114 }
 115
 116 static const char*
 117 ins_immus8 (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 118 {
 119   if (value & 0x7)
 120     return "value not an integer multiple of 8";
 121   return ins_immu (self, value >> 3, code);
 122 }
 123
 124 static const char*
 125 ext_immus8 (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 126 {
 127   const char *result;
 128
 129   result = ext_immu (self, code, valuep);
 130   if (result)
 131     return result;
 132
 133   *valuep = *valuep << 3;
 134   return 0;
 135 }
 136
 137 static const char*
 138 ins_imms_scaled (const struct ia64_operand *self, ia64_insn value,
 139                  ia64_insn *code, int scale)
 140 {
 141   BFD_HOST_64_BIT svalue = value, sign_bit = 0;
 142   ia64_insn new = 0;
 143   int i;
 144
 145   svalue >>= scale;
 146
 147   for (i = 0; i < NELEMS (self->field) && self->field[i].bits; ++i)
 148     {
 149       new |= ((svalue & ((((ia64_insn) 1) << self->field[i].bits) - 1))
 150               << self->field[i].shift);
 151       sign_bit = (svalue >> (self->field[i].bits - 1)) & 1;
 152       svalue >>= self->field[i].bits;
 153     }
 154   if ((!sign_bit && svalue != 0) || (sign_bit && svalue != -1))
 155     return "integer operand out of range";
 156
 157   *code |= new;
 158   return 0;
 159 }
 160
 161 static const char*
 162 ext_imms_scaled (const struct ia64_operand *self, ia64_insn code,
 163                  ia64_insn *valuep, int scale)
 164 {
 165   int i, bits = 0, total = 0;
 166   BFD_HOST_64_BIT val = 0, sign;
 167
 168   for (i = 0; i < NELEMS (self->field) && self->field[i].bits; ++i)
 169     {
 170       bits = self->field[i].bits;
 171       val |= ((code >> self->field[i].shift)
 172               & ((((BFD_HOST_U_64_BIT) 1) << bits) - 1)) << total;
 173       total += bits;
 174     }
 175   /* sign extend: */
 176   sign = (BFD_HOST_64_BIT) 1 << (total - 1);
 177   val = (val ^ sign) - sign;
 178
 179   *valuep = (val << scale);
 180   return 0;
 181 }
 182
 183 static const char*
 184 ins_imms (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 185 {
 186   return ins_imms_scaled (self, value, code, 0);
 187 }
 188
 189 static const char*
 190 ins_immsu4 (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 191 {
 192   value = ((value & 0xffffffff) ^ 0x80000000) - 0x80000000;
 193
 194   return ins_imms_scaled (self, value, code, 0);
 195 }
 196
 197 static const char*
 198 ext_imms (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 199 {
 200   return ext_imms_scaled (self, code, valuep, 0);
 201 }
 202
 203 static const char*
 204 ins_immsm1 (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 205 {
 206   --value;
 207   return ins_imms_scaled (self, value, code, 0);
 208 }
 209
 210 static const char*
 211 ins_immsm1u4 (const struct ia64_operand *self, ia64_insn value,
 212               ia64_insn *code)
 213 {
 214   value = ((value & 0xffffffff) ^ 0x80000000) - 0x80000000;
 215
 216   --value;
 217   return ins_imms_scaled (self, value, code, 0);
 218 }
 219
 220 static const char*
 221 ext_immsm1 (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 222 {
 223   const char *res = ext_imms_scaled (self, code, valuep, 0);
 224
 225   ++*valuep;
 226   return res;
 227 }
 228
 229 static const char*
 230 ins_imms1 (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 231 {
 232   return ins_imms_scaled (self, value, code, 1);
 233 }
 234
 235 static const char*
 236 ext_imms1 (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 237 {
 238   return ext_imms_scaled (self, code, valuep, 1);
 239 }
 240
 241 static const char*
 242 ins_imms4 (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 243 {
 244   return ins_imms_scaled (self, value, code, 4);
 245 }
 246
 247 static const char*
 248 ext_imms4 (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 249 {
 250   return ext_imms_scaled (self, code, valuep, 4);
 251 }
 252
 253 static const char*
 254 ins_imms16 (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 255 {
 256   return ins_imms_scaled (self, value, code, 16);
 257 }
 258
 259 static const char*
 260 ext_imms16 (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 261 {
 262   return ext_imms_scaled (self, code, valuep, 16);
 263 }
 264
 265 static const char*
 266 ins_cimmu (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 267 {
 268   ia64_insn mask = (((ia64_insn) 1) << self->field[0].bits) - 1;
 269   return ins_immu (self, value ^ mask, code);
 270 }
 271
 272 static const char*
 273 ext_cimmu (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 274 {
 275   const char *result;
 276   ia64_insn mask;
 277
 278   mask = (((ia64_insn) 1) << self->field[0].bits) - 1;
 279   result = ext_immu (self, code, valuep);
 280   if (!result)
 281     {
 282       mask = (((ia64_insn) 1) << self->field[0].bits) - 1;
 283       *valuep ^= mask;
 284     }
 285   return result;
 286 }
 287
 288 static const char*
 289 ins_cnt (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 290 {
 291   --value;
 292   if (value >= ((BFD_HOST_U_64_BIT) 1) << self->field[0].bits)
 293     return "count out of range";
 294
 295   *code |= value << self->field[0].shift;
 296   return 0;
 297 }
 298
 299 static const char*
 300 ext_cnt (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 301 {
 302   *valuep = ((code >> self->field[0].shift)
 303              & ((((BFD_HOST_U_64_BIT) 1) << self->field[0].bits) - 1)) + 1;
 304   return 0;
 305 }
 306
 307 static const char*
 308 ins_cnt2b (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 309 {
 310   --value;
 311
 312   if (value > 2)
 313     return "count must be in range 1..3";
 314
 315   *code |= value << self->field[0].shift;
 316   return 0;
 317 }
 318
 319 static const char*
 320 ext_cnt2b (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 321 {
 322   *valuep = ((code >> self->field[0].shift) & 0x3) + 1;
 323   return 0;
 324 }
 325
 326 static const char*
 327 ins_cnt2c (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 328 {
 329   switch (value)
 330     {
 331     case 0:     value = 0; break;
 332     case 7:     value = 1; break;
 333     case 15:    value = 2; break;
 334     case 16:    value = 3; break;
 335     default:    return "count must be 0, 7, 15, or 16";
 336     }
 337   *code |= value << self->field[0].shift;
 338   return 0;
 339 }
 340
 341 static const char*
 342 ext_cnt2c (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 343 {
 344   ia64_insn value;
 345
 346   value = (code >> self->field[0].shift) & 0x3;
 347   switch (value)
 348     {
 349     case 0: value =  0; break;
 350     case 1: value =  7; break;
 351     case 2: value = 15; break;
 352     case 3: value = 16; break;
 353     }
 354   *valuep = value;
 355   return 0;
 356 }
 357
 358 static const char*
 359 ins_inc3 (const struct ia64_operand *self, ia64_insn value, ia64_insn *code)
 360 {
 361   BFD_HOST_64_BIT val = value;
 362   BFD_HOST_U_64_BIT sign = 0;
 363
 364   if (val < 0)
 365     {
 366       sign = 0x4;
 367       value = -value;
 368     }
 369   switch (value)
 370     {
 371     case  1:    value = 3; break;
 372     case  4:    value = 2; break;
 373     case  8:    value = 1; break;
 374     case 16:    value = 0; break;
 375     default:    return "count must be +/- 1, 4, 8, or 16";
 376     }
 377   *code |= (sign | value) << self->field[0].shift;
 378   return 0;
 379 }
 380
 381 static const char*
 382 ext_inc3 (const struct ia64_operand *self, ia64_insn code, ia64_insn *valuep)
 383 {
 384   BFD_HOST_64_BIT val;
 385   int negate;
 386
 387   val = (code >> self->field[0].shift) & 0x7;
 388   negate = val & 0x4;
 389   switch (val & 0x3)
 390     {
 391     case 0: val = 16; break;
 392     case 1: val =  8; break;
 393     case 2: val =  4; break;
 394     case 3: val =  1; break;
 395     }
 396   if (negate)
 397     val = -val;
 398
 399   *valuep = val;
 400   return 0;
 401 }
 402
 403 #define CST     IA64_OPND_CLASS_CST
 404 #define REG     IA64_OPND_CLASS_REG
 405 #define IND     IA64_OPND_CLASS_IND
 406 #define ABS     IA64_OPND_CLASS_ABS
 407 #define REL     IA64_OPND_CLASS_REL
 408
 409 #define SDEC    IA64_OPND_FLAG_DECIMAL_SIGNED
 410 #define UDEC    IA64_OPND_FLAG_DECIMAL_UNSIGNED
 411
 412 const struct ia64_operand elf64_ia64_operands[IA64_OPND_COUNT] =
 413   {
 414     /* constants: */
 415     { CST, ins_const, ext_const, "NIL",         {{ 0, 0}}, 0, "<none>" },
 416     { CST, ins_const, ext_const, "ar.csd",      {{ 0, 0}}, 0, "ar.csd" },
 417     { CST, ins_const, ext_const, "ar.ccv",      {{ 0, 0}}, 0, "ar.ccv" },
 418     { CST, ins_const, ext_const, "ar.pfs",      {{ 0, 0}}, 0, "ar.pfs" },
 419     { CST, ins_const, ext_const, "1",           {{ 0, 0}}, 0, "1" },
 420     { CST, ins_const, ext_const, "8",           {{ 0, 0}}, 0, "8" },
 421     { CST, ins_const, ext_const, "16",          {{ 0, 0}}, 0, "16" },
 422     { CST, ins_const, ext_const, "r0",          {{ 0, 0}}, 0, "r0" },
 423     { CST, ins_const, ext_const, "ip",          {{ 0, 0}}, 0, "ip" },
 424     { CST, ins_const, ext_const, "pr",          {{ 0, 0}}, 0, "pr" },
 425     { CST, ins_const, ext_const, "pr.rot",      {{ 0, 0}}, 0, "pr.rot" },
 426     { CST, ins_const, ext_const, "psr",         {{ 0, 0}}, 0, "psr" },
 427     { CST, ins_const, ext_const, "psr.l",       {{ 0, 0}}, 0, "psr.l" },
 428     { CST, ins_const, ext_const, "psr.um",      {{ 0, 0}}, 0, "psr.um" },
 429
 430     /* register operands: */
 431     { REG, ins_reg,   ext_reg,  "ar", {{ 7, 20}}, 0,            /* AR3 */
 432       "an application register" },
 433     { REG, ins_reg,   ext_reg,   "b", {{ 3,  6}}, 0,            /* B1 */
 434       "a branch register" },
 435     { REG, ins_reg,   ext_reg,   "b", {{ 3, 13}}, 0,            /* B2 */
 436       "a branch register"},
 437     { REG, ins_reg,   ext_reg,  "cr", {{ 7, 20}}, 0,            /* CR */
 438       "a control register"},
 439     { REG, ins_reg,   ext_reg,   "f", {{ 7,  6}}, 0,            /* F1 */
 440       "a floating-point register" },
 441     { REG, ins_reg,   ext_reg,   "f", {{ 7, 13}}, 0,            /* F2 */
 442       "a floating-point register" },
 443     { REG, ins_reg,   ext_reg,   "f", {{ 7, 20}}, 0,            /* F3 */
 444       "a floating-point register" },
 445     { REG, ins_reg,   ext_reg,   "f", {{ 7, 27}}, 0,            /* F4 */
 446       "a floating-point register" },
 447     { REG, ins_reg,   ext_reg,   "p", {{ 6,  6}}, 0,            /* P1 */
 448       "a predicate register" },
 449     { REG, ins_reg,   ext_reg,   "p", {{ 6, 27}}, 0,            /* P2 */
 450       "a predicate register" },
 451     { REG, ins_reg,   ext_reg,   "r", {{ 7,  6}}, 0,            /* R1 */
 452       "a general register" },
 453     { REG, ins_reg,   ext_reg,   "r", {{ 7, 13}}, 0,            /* R2 */
 454       "a general register" },
 455     { REG, ins_reg,   ext_reg,   "r", {{ 7, 20}}, 0,            /* R3 */
 456       "a general register" },
 457     { REG, ins_reg,   ext_reg,   "r", {{ 2, 20}}, 0,            /* R3_2 */
 458       "a general register r0-r3" },
 459
 460     /* indirect operands: */
 461     { IND, ins_reg,   ext_reg,  "cpuid", {{7, 20}}, 0,          /* CPUID_R3 */
 462       "a cpuid register" },
 463     { IND, ins_reg,   ext_reg,  "dbr",   {{7, 20}}, 0,          /* DBR_R3 */
 464       "a dbr register" },
 465     { IND, ins_reg,   ext_reg,  "dtr",   {{7, 20}}, 0,          /* DTR_R3 */
 466       "a dtr register" },
 467     { IND, ins_reg,   ext_reg,  "itr",   {{7, 20}}, 0,          /* ITR_R3 */
 468       "an itr register" },
 469     { IND, ins_reg,   ext_reg,  "ibr",   {{7, 20}}, 0,          /* IBR_R3 */
 470       "an ibr register" },
 471     { IND, ins_reg,   ext_reg,  "",      {{7, 20}}, 0,          /* MR3 */
 472       "an indirect memory address" },
 473     { IND, ins_reg,   ext_reg,  "msr",   {{7, 20}}, 0,          /* MSR_R3 */
 474       "an msr register" },
 475     { IND, ins_reg,   ext_reg,  "pkr",   {{7, 20}}, 0,          /* PKR_R3 */
 476       "a pkr register" },
 477     { IND, ins_reg,   ext_reg,  "pmc",   {{7, 20}}, 0,          /* PMC_R3 */
 478       "a pmc register" },
 479     { IND, ins_reg,   ext_reg,  "pmd",   {{7, 20}}, 0,          /* PMD_R3 */
 480       "a pmd register" },
 481     { IND, ins_reg,   ext_reg,  "rr",    {{7, 20}}, 0,          /* RR_R3 */
 482       "an rr register" },
 483
 484     /* immediate operands: */
 485     { ABS, ins_cimmu, ext_cimmu, 0, {{ 5, 20 }}, UDEC,          /* CCNT5 */
 486       "a 5-bit count (0-31)" },
 487     { ABS, ins_cnt,   ext_cnt,   0, {{ 2, 27 }}, UDEC,          /* CNT2a */
 488       "a 2-bit count (1-4)" },
 489     { ABS, ins_cnt2b, ext_cnt2b, 0, {{ 2, 27 }}, UDEC,          /* CNT2b */
 490       "a 2-bit count (1-3)" },
 491     { ABS, ins_cnt2c, ext_cnt2c, 0, {{ 2, 30 }}, UDEC,          /* CNT2c */
 492       "a count (0, 7, 15, or 16)" },
 493     { ABS, ins_immu,  ext_immu,  0, {{ 5, 14}}, UDEC,           /* CNT5 */
 494       "a 5-bit count (0-31)" },
 495     { ABS, ins_immu,  ext_immu,  0, {{ 6, 27}}, UDEC,           /* CNT6 */
 496       "a 6-bit count (0-63)" },
 497     { ABS, ins_cimmu, ext_cimmu, 0, {{ 6, 20}}, UDEC,           /* CPOS6a */
 498       "a 6-bit bit pos (0-63)" },
 499     { ABS, ins_cimmu, ext_cimmu, 0, {{ 6, 14}}, UDEC,           /* CPOS6b */
 500       "a 6-bit bit pos (0-63)" },
 501     { ABS, ins_cimmu, ext_cimmu, 0, {{ 6, 31}}, UDEC,           /* CPOS6c */
 502       "a 6-bit bit pos (0-63)" },
 503     { ABS, ins_imms,  ext_imms,  0, {{ 1, 36}}, SDEC,           /* IMM1 */
 504       "a 1-bit integer (-1, 0)" },
 505     { ABS, ins_immu,  ext_immu,  0, {{ 2, 13}}, UDEC,           /* IMMU2 */
 506       "a 2-bit unsigned (0-3)" },
 507     { ABS, ins_immu,  ext_immu,  0, {{ 7, 13}}, 0,              /* IMMU7a */
 508       "a 7-bit unsigned (0-127)" },
 509     { ABS, ins_immu,  ext_immu,  0, {{ 7, 20}}, 0,              /* IMMU7b */
 510       "a 7-bit unsigned (0-127)" },
 511     { ABS, ins_immu,  ext_immu,  0, {{ 7, 13}}, UDEC,           /* SOF */
 512       "a frame size (register count)" },
 513     { ABS, ins_immu,  ext_immu,  0, {{ 7, 20}}, UDEC,           /* SOL */
 514       "a local register count" },
 515     { ABS, ins_immus8,ext_immus8,0, {{ 4, 27}}, UDEC,           /* SOR */
 516       "a rotating register count (integer multiple of 8)" },
 517     { ABS, ins_imms,  ext_imms,  0,                             /* IMM8 */
 518       {{ 7, 13}, { 1, 36}}, SDEC,
 519       "an 8-bit integer (-128-127)" },
 520     { ABS, ins_immsu4,  ext_imms,  0,                           /* IMM8U4 */
 521       {{ 7, 13}, { 1, 36}}, SDEC,
 522       "an 8-bit signed integer for 32-bit unsigned compare (-128-127)" },
 523     { ABS, ins_immsm1,  ext_immsm1,  0,                         /* IMM8M1 */
 524       {{ 7, 13}, { 1, 36}}, SDEC,
 525       "an 8-bit integer (-127-128)" },
 526     { ABS, ins_immsm1u4,  ext_immsm1,  0,                       /* IMM8M1U4 */
 527       {{ 7, 13}, { 1, 36}}, SDEC,
 528       "an 8-bit integer for 32-bit unsigned compare (-127-(-1),1-128,0x100000000)" },
 529     { ABS, ins_immsm1,  ext_immsm1,  0,                         /* IMM8M1U8 */
 530       {{ 7, 13}, { 1, 36}}, SDEC,
 531       "an 8-bit integer for 64-bit unsigned compare (-127-(-1),1-128,0x10000000000000000)" },
 532     { ABS, ins_immu,  ext_immu,  0, {{ 2, 33}, { 7, 20}}, 0,    /* IMMU9 */
 533       "a 9-bit unsigned (0-511)" },
 534     { ABS, ins_imms,  ext_imms,  0,                             /* IMM9a */
 535       {{ 7,  6}, { 1, 27}, { 1, 36}}, SDEC,
 536       "a 9-bit integer (-256-255)" },
 537     { ABS, ins_imms,  ext_imms, 0,                              /* IMM9b */
 538       {{ 7, 13}, { 1, 27}, { 1, 36}}, SDEC,
 539       "a 9-bit integer (-256-255)" },
 540     { ABS, ins_imms,  ext_imms, 0,                              /* IMM14 */
 541       {{ 7, 13}, { 6, 27}, { 1, 36}}, SDEC,
 542       "a 14-bit integer (-8192-8191)" },
 543     { ABS, ins_imms1, ext_imms1, 0,                             /* IMM17 */
 544       {{ 7,  6}, { 8, 24}, { 1, 36}}, 0,
 545       "a 17-bit integer (-65536-65535)" },
 546     { ABS, ins_immu,  ext_immu,  0, {{20,  6}, { 1, 36}}, 0,    /* IMMU21 */
 547       "a 21-bit unsigned" },
 548     { ABS, ins_imms,  ext_imms,  0,                             /* IMM22 */
 549       {{ 7, 13}, { 9, 27}, { 5, 22}, { 1, 36}}, SDEC,
 550       "a 22-bit signed integer" },
 551     { ABS, ins_immu,  ext_immu,  0,                             /* IMMU24 */
 552       {{21,  6}, { 2, 31}, { 1, 36}}, 0,
 553       "a 24-bit unsigned" },
 554     { ABS, ins_imms16,ext_imms16,0, {{27,  6}, { 1, 36}}, 0,    /* IMM44 */
 555       "a 44-bit unsigned (least 16 bits ignored/zeroes)" },
 556     { ABS, ins_rsvd,  ext_rsvd, 0, {{0,  0}}, 0,                /* IMMU62 */
 557       "a 62-bit unsigned" },
 558     { ABS, ins_rsvd,  ext_rsvd, 0, {{0,  0}}, 0,                /* IMMU64 */
 559       "a 64-bit unsigned" },
 560     { ABS, ins_inc3,  ext_inc3,  0, {{ 3, 13}}, SDEC,           /* INC3 */
 561       "an increment (+/- 1, 4, 8, or 16)" },
 562     { ABS, ins_cnt,   ext_cnt,   0, {{ 4, 27}}, UDEC,           /* LEN4 */
 563       "a 4-bit length (1-16)" },
 564     { ABS, ins_cnt,   ext_cnt,   0, {{ 6, 27}}, UDEC,           /* LEN6 */
 565       "a 6-bit length (1-64)" },
 566     { ABS, ins_immu,  ext_immu,  0, {{ 4, 20}}, 0,              /* MBTYPE4 */
 567       "a mix type (@rev, @mix, @shuf, @alt, or @brcst)" },
 568     { ABS, ins_immu,  ext_immu,  0, {{ 8, 20}}, 0,              /* MBTYPE8 */
 569       "an 8-bit mix type" },
 570     { ABS, ins_immu,  ext_immu,  0, {{ 6, 14}}, UDEC,           /* POS6 */
 571       "a 6-bit bit pos (0-63)" },
 572     { REL, ins_imms4, ext_imms4, 0, {{ 7,  6}, { 2, 33}}, 0,    /* TAG13 */
 573       "a branch tag" },
 574     { REL, ins_imms4, ext_imms4, 0, {{ 9, 24}}, 0,              /* TAG13b */
 575       "a branch tag" },
 576     { REL, ins_imms4, ext_imms4, 0, {{20,  6}, { 1, 36}}, 0,    /* TGT25 */
 577       "a branch target" },
 578     { REL, ins_imms4, ext_imms4, 0,                             /* TGT25b */
 579       {{ 7,  6}, {13, 20}, { 1, 36}}, 0,
 580       "a branch target" },
 581     { REL, ins_imms4, ext_imms4, 0, {{20, 13}, { 1, 36}}, 0,    /* TGT25c */
 582       "a branch target" },
 583     { REL, ins_rsvd, ext_rsvd, 0, {{0, 0}}, 0,                  /* TGT64  */
 584       "a branch target" },
 585
 586     { ABS, ins_const, ext_const, 0, {{0, 0}}, 0,                /* LDXMOV */
 587       "ldxmov target" },
 588   };