opcodes/nios2-opc.c

   1 /* Altera Nios II opcode list.
   2    Copyright (C) 2012, 2013 Free Software Foundation, Inc.
   3    Contributed by Nigel Gray (ngray@altera.com).
   4    Contributed by Mentor Graphics, Inc.
   5
   6    This file is part of the GNU opcodes library.
   7
   8    This library is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3, or (at your option)
  11    any later version.
  12
  13    It is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this file; see the file COPYING.  If not, write to the
  20    Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include <stdio.h>
  25 #include "opcode/nios2.h"
  26
  27 /* Register string table */
  28
  29 const struct nios2_reg nios2_builtin_regs[] = {
  30   /* Standard register names.  */
  31   {"zero", 0},
  32   {"at", 1},                    /* assembler temporary */
  33   {"r2", 2},
  34   {"r3", 3},
  35   {"r4", 4},
  36   {"r5", 5},
  37   {"r6", 6},
  38   {"r7", 7},
  39   {"r8", 8},
  40   {"r9", 9},
  41   {"r10", 10},
  42   {"r11", 11},
  43   {"r12", 12},
  44   {"r13", 13},
  45   {"r14", 14},
  46   {"r15", 15},
  47   {"r16", 16},
  48   {"r17", 17},
  49   {"r18", 18},
  50   {"r19", 19},
  51   {"r20", 20},
  52   {"r21", 21},
  53   {"r22", 22},
  54   {"r23", 23},
  55   {"et", 24},
  56   {"bt", 25},
  57   {"gp", 26},                   /* global pointer */
  58   {"sp", 27},                   /* stack pointer */
  59   {"fp", 28},                   /* frame pointer */
  60   {"ea", 29},                   /* exception return address */
  61   {"ba", 30},                   /* breakpoint return address */
  62   {"ra", 31},                   /* return address */
  63
  64   /* Alternative names for special registers.  */
  65   {"r0", 0},
  66   {"r1", 1},
  67   {"r24", 24},
  68   {"r25", 25},
  69   {"r26", 26},
  70   {"r27", 27},
  71   {"r28", 28},
  72   {"r29", 29},
  73   {"r30", 30},
  74   {"sstatus", 30},
  75   {"r31", 31},
  76
  77   /* Control register names.  */
  78   {"status", 0},
  79   {"estatus", 1},
  80   {"bstatus", 2},
  81   {"ienable", 3},
  82   {"ipending", 4},
  83   {"cpuid", 5},
  84   {"ctl6", 6},
  85   {"exception", 7},
  86   {"pteaddr", 8},
  87   {"tlbacc", 9},
  88   {"tlbmisc", 10},
  89   {"eccinj", 11},
  90   {"badaddr", 12},
  91   {"config", 13},
  92   {"mpubase", 14},
  93   {"mpuacc", 15},
  94   {"ctl16", 16},
  95   {"ctl17", 17},
  96   {"ctl18", 18},
  97   {"ctl19", 19},
  98   {"ctl20", 20},
  99   {"ctl21", 21},
 100   {"ctl22", 22},
 101   {"ctl23", 23},
 102   {"ctl24", 24},
 103   {"ctl25", 25},
 104   {"ctl26", 26},
 105   {"ctl27", 27},
 106   {"ctl28", 28},
 107   {"ctl29", 29},
 108   {"ctl30", 30},
 109   {"ctl31", 31},
 110
 111   /* Alternative names for special control registers.  */
 112   {"ctl0", 0},
 113   {"ctl1", 1},
 114   {"ctl2", 2},
 115   {"ctl3", 3},
 116   {"ctl4", 4},
 117   {"ctl5", 5},
 118   {"ctl7", 7},
 119   {"ctl8", 8},
 120   {"ctl9", 9},
 121   {"ctl10", 10},
 122   {"ctl11", 11},
 123   {"ctl12", 12},
 124   {"ctl13", 13},
 125   {"ctl14", 14},
 126   {"ctl15", 15},
 127
 128   /* Coprocessor register names.  */
 129   {"c0", 0},
 130   {"c1", 1},
 131   {"c2", 2},
 132   {"c3", 3},
 133   {"c4", 4},
 134   {"c5", 5},
 135   {"c6", 6},
 136   {"c7", 7},
 137   {"c8", 8},
 138   {"c9", 9},
 139   {"c10", 10},
 140   {"c11", 11},
 141   {"c12", 12},
 142   {"c13", 13},
 143   {"c14", 14},
 144   {"c15", 15},
 145   {"c16", 16},
 146   {"c17", 17},
 147   {"c18", 18},
 148   {"c19", 19},
 149   {"c20", 20},
 150   {"c21", 21},
 151   {"c22", 22},
 152   {"c23", 23},
 153   {"c24", 24},
 154   {"c25", 25},
 155   {"c26", 26},
 156   {"c27", 27},
 157   {"c28", 28},
 158   {"c29", 29},
 159   {"c30", 30},
 160   {"c31", 31},
 161 };
 162
 163 #define NIOS2_NUM_REGS \
 164        ((sizeof nios2_builtin_regs) / (sizeof (nios2_builtin_regs[0])))
 165 const int nios2_num_builtin_regs = NIOS2_NUM_REGS;
 166
 167 /* This is not const in order to allow for dynamic extensions to the
 168    built-in instruction set.  */
 169 struct nios2_reg *nios2_regs = (struct nios2_reg *) nios2_builtin_regs;
 170 int nios2_num_regs = NIOS2_NUM_REGS;
 171 #undef NIOS2_NUM_REGS
 172
 173 /* This is the opcode table used by the Nios II GNU as, disassembler
 174    and GDB.  */
 175 const struct nios2_opcode nios2_builtin_opcodes[] =
 176 {
 177   /* { name, args, args_test, num_args,
 178        match, mask, pinfo, overflow_msg } */
 179   {"add", "d,s,t", "d,s,t,E", 3,
 180    OP_MATCH_ADD, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 181   {"addi", "t,s,i", "t,s,i,E", 3,
 182    OP_MATCH_ADDI, OP_MASK_IOP, NIOS2_INSN_ADDI, signed_immed16_overflow},
 183   {"subi", "t,s,i", "t,s,i,E", 3,
 184    OP_MATCH_ADDI, OP_MASK_IOP, NIOS2_INSN_MACRO, signed_immed16_overflow},
 185   {"and", "d,s,t", "d,s,t,E", 3,
 186    OP_MATCH_AND, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 187   {"andhi", "t,s,u", "t,s,u,E", 3,
 188    OP_MATCH_ANDHI, OP_MASK_IOP, 0, unsigned_immed16_overflow},
 189   {"andi", "t,s,u", "t,s,u,E", 3,
 190    OP_MATCH_ANDI, OP_MASK_IOP, NIOS2_INSN_ANDI, unsigned_immed16_overflow},
 191   {"beq", "s,t,o", "s,t,o,E", 3,
 192    OP_MATCH_BEQ, OP_MASK_IOP, NIOS2_INSN_CBRANCH, branch_target_overflow},
 193   {"bge", "s,t,o", "s,t,o,E", 3,
 194    OP_MATCH_BGE, OP_MASK_IOP, NIOS2_INSN_CBRANCH, branch_target_overflow},
 195   {"bgeu", "s,t,o", "s,t,o,E", 3,
 196    OP_MATCH_BGEU, OP_MASK_IOP, NIOS2_INSN_CBRANCH, branch_target_overflow},
 197   {"bgt", "s,t,o", "s,t,o,E", 3,
 198    OP_MATCH_BLT, OP_MASK_IOP, NIOS2_INSN_MACRO|NIOS2_INSN_CBRANCH,
 199    branch_target_overflow},
 200   {"bgtu", "s,t,o", "s,t,o,E", 3,
 201    OP_MATCH_BLTU, OP_MASK_IOP, NIOS2_INSN_MACRO|NIOS2_INSN_CBRANCH,
 202    branch_target_overflow},
 203   {"ble", "s,t,o", "s,t,o,E", 3,
 204    OP_MATCH_BGE, OP_MASK_IOP, NIOS2_INSN_MACRO|NIOS2_INSN_CBRANCH,
 205    branch_target_overflow},
 206   {"bleu", "s,t,o", "s,t,o,E", 3,
 207    OP_MATCH_BGEU, OP_MASK_IOP, NIOS2_INSN_MACRO|NIOS2_INSN_CBRANCH,
 208    branch_target_overflow},
 209   {"blt", "s,t,o", "s,t,o,E", 3,
 210    OP_MATCH_BLT, OP_MASK_IOP, NIOS2_INSN_CBRANCH, branch_target_overflow},
 211   {"bltu", "s,t,o", "s,t,o,E", 3,
 212    OP_MATCH_BLTU, OP_MASK_IOP, NIOS2_INSN_CBRANCH, branch_target_overflow},
 213   {"bne", "s,t,o", "s,t,o,E", 3,
 214    OP_MATCH_BNE, OP_MASK_IOP, NIOS2_INSN_CBRANCH, branch_target_overflow},
 215   {"br", "o", "o,E", 1,
 216    OP_MATCH_BR, OP_MASK_IOP, NIOS2_INSN_UBRANCH, branch_target_overflow},
 217   {"break", "b", "b,E", 1,
 218    OP_MATCH_BREAK, OP_MASK_BREAK, 0, no_overflow},
 219   {"bret", "", "E", 0,
 220    OP_MATCH_BRET, OP_MASK, 0, no_overflow},
 221   {"flushd", "i(s)", "i(s)E", 2,
 222    OP_MATCH_FLUSHD, OP_MASK_IOP, 0, signed_immed16_overflow},
 223   {"flushda", "i(s)", "i(s)E", 2,
 224    OP_MATCH_FLUSHDA, OP_MASK_IOP, 0, signed_immed16_overflow},
 225   {"flushi", "s", "s,E", 1,
 226    OP_MATCH_FLUSHI, OP_MASK_FLUSHI, 0, no_overflow},
 227   {"flushp", "", "E", 0,
 228    OP_MATCH_FLUSHP, OP_MASK, 0, no_overflow},
 229   {"initd", "i(s)", "i(s)E", 2,
 230    OP_MATCH_INITD, OP_MASK_IOP, 0, signed_immed16_overflow},
 231   {"initda", "i(s)", "i(s)E", 2,
 232    OP_MATCH_INITDA, OP_MASK_IOP, 0, signed_immed16_overflow},
 233   {"initi", "s", "s,E", 1,
 234    OP_MATCH_INITI, OP_MASK_INITI, 0, no_overflow},
 235   {"call", "m", "m,E", 1,
 236    OP_MATCH_CALL, OP_MASK_IOP, NIOS2_INSN_CALL, call_target_overflow},
 237   {"callr", "s", "s,E", 1,
 238    OP_MATCH_CALLR, OP_MASK_CALLR, 0, no_overflow},
 239   {"cmpeq", "d,s,t", "d,s,t,E", 3,
 240    OP_MATCH_CMPEQ, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 241   {"cmpeqi", "t,s,i", "t,s,i,E", 3,
 242    OP_MATCH_CMPEQI, OP_MASK_IOP, 0, signed_immed16_overflow},
 243   {"cmpge", "d,s,t", "d,s,t,E", 3,
 244    OP_MATCH_CMPGE, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 245   {"cmpgei", "t,s,i", "t,s,i,E", 3,
 246    OP_MATCH_CMPGEI, OP_MASK_IOP, 0, signed_immed16_overflow},
 247   {"cmpgeu", "d,s,t", "d,s,t,E", 3,
 248    OP_MATCH_CMPGEU, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 249   {"cmpgeui", "t,s,u", "t,s,u,E", 3,
 250    OP_MATCH_CMPGEUI, OP_MASK_IOP, 0, unsigned_immed16_overflow},
 251   {"cmpgt", "d,s,t", "d,s,t,E", 3,
 252    OP_MATCH_CMPLT, OP_MASK_ROPX | OP_MASK_ROP, NIOS2_INSN_MACRO, no_overflow},
 253   {"cmpgti", "t,s,i", "t,s,i,E", 3,
 254    OP_MATCH_CMPGEI, OP_MASK_IOP, NIOS2_INSN_MACRO, signed_immed16_overflow},
 255   {"cmpgtu", "d,s,t", "d,s,t,E", 3,
 256    OP_MATCH_CMPLTU, OP_MASK_ROPX | OP_MASK_ROP, NIOS2_INSN_MACRO, no_overflow},
 257   {"cmpgtui", "t,s,u", "t,s,u,E", 3,
 258    OP_MATCH_CMPGEUI, OP_MASK_IOP, NIOS2_INSN_MACRO, unsigned_immed16_overflow},
 259   {"cmple", "d,s,t", "d,s,t,E", 3,
 260    OP_MATCH_CMPGE, OP_MASK_ROPX | OP_MASK_ROP, NIOS2_INSN_MACRO, no_overflow},
 261   {"cmplei", "t,s,i", "t,s,i,E", 3,
 262    OP_MATCH_CMPLTI, OP_MASK_IOP, NIOS2_INSN_MACRO, signed_immed16_overflow},
 263   {"cmpleu", "d,s,t", "d,s,t,E", 3,
 264    OP_MATCH_CMPGEU, OP_MASK_ROPX | OP_MASK_ROP, NIOS2_INSN_MACRO, no_overflow},
 265   {"cmpleui", "t,s,u", "t,s,u,E", 3,
 266    OP_MATCH_CMPLTUI, OP_MASK_IOP, NIOS2_INSN_MACRO, unsigned_immed16_overflow},
 267   {"cmplt", "d,s,t", "d,s,t,E", 3,
 268    OP_MATCH_CMPLT, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 269   {"cmplti", "t,s,i", "t,s,i,E", 3,
 270    OP_MATCH_CMPLTI, OP_MASK_IOP, 0, signed_immed16_overflow},
 271   {"cmpltu", "d,s,t", "d,s,t,E", 3,
 272    OP_MATCH_CMPLTU, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 273   {"cmpltui", "t,s,u", "t,s,u,E", 3,
 274    OP_MATCH_CMPLTUI, OP_MASK_IOP, 0, unsigned_immed16_overflow},
 275   {"cmpne", "d,s,t", "d,s,t,E", 3,
 276    OP_MATCH_CMPNE, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 277   {"cmpnei", "t,s,i", "t,s,i,E", 3,
 278    OP_MATCH_CMPNEI, OP_MASK_IOP, 0, signed_immed16_overflow},
 279   {"div", "d,s,t", "d,s,t,E", 3,
 280    OP_MATCH_DIV, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 281   {"divu", "d,s,t", "d,s,t,E", 3,
 282    OP_MATCH_DIVU, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 283   {"jmp", "s", "s,E", 1,
 284    OP_MATCH_JMP, OP_MASK_JMP, 0, no_overflow},
 285   {"jmpi", "m", "m,E", 1,
 286    OP_MATCH_JMPI, OP_MASK_IOP, 0, no_overflow},
 287   {"ldb", "t,i(s)", "t,i(s)E", 3,
 288    OP_MATCH_LDB, OP_MASK_IOP, 0, address_offset_overflow},
 289   {"ldbio", "t,i(s)", "t,i(s)E", 3,
 290    OP_MATCH_LDBIO, OP_MASK_IOP, 0, address_offset_overflow},
 291   {"ldbu", "t,i(s)", "t,i(s)E", 3,
 292    OP_MATCH_LDBU, OP_MASK_IOP, 0, address_offset_overflow},
 293   {"ldbuio", "t,i(s)", "t,i(s)E", 3,
 294    OP_MATCH_LDBUIO, OP_MASK_IOP, 0, address_offset_overflow},
 295   {"ldh", "t,i(s)", "t,i(s)E", 3,
 296    OP_MATCH_LDH, OP_MASK_IOP, 0, address_offset_overflow},
 297   {"ldhio", "t,i(s)", "t,i(s)E", 3,
 298    OP_MATCH_LDHIO, OP_MASK_IOP, 0, address_offset_overflow},
 299   {"ldhu", "t,i(s)", "t,i(s)E", 3,
 300    OP_MATCH_LDHU, OP_MASK_IOP, 0, address_offset_overflow},
 301   {"ldhuio", "t,i(s)", "t,i(s)E", 3,
 302    OP_MATCH_LDHUIO, OP_MASK_IOP, 0, address_offset_overflow},
 303   {"ldl", "t,i(s)", "t,i(s)E", 3,
 304    OP_MATCH_LDL, OP_MASK_IOP, 0, address_offset_overflow},
 305   {"ldw", "t,i(s)", "t,i(s)E", 3,
 306    OP_MATCH_LDW, OP_MASK_IOP, 0, address_offset_overflow},
 307   {"ldwio", "t,i(s)", "t,i(s)E", 3,
 308    OP_MATCH_LDWIO, OP_MASK_IOP, 0, address_offset_overflow},
 309   {"mov", "d,s", "d,s,E", 2,
 310    OP_MATCH_ADD, OP_MASK_RRT|OP_MASK_ROPX|OP_MASK_ROP, NIOS2_INSN_MACRO_MOV,
 311    no_overflow},
 312   {"movhi", "t,u", "t,u,E", 2,
 313    OP_MATCH_ORHI, OP_MASK_IRS|OP_MASK_IOP, NIOS2_INSN_MACRO_MOVI,
 314    unsigned_immed16_overflow},
 315   {"movui", "t,u", "t,u,E", 2,
 316    OP_MATCH_ORI, OP_MASK_IRS|OP_MASK_IOP, NIOS2_INSN_MACRO_MOVI,
 317    unsigned_immed16_overflow},
 318   {"movi", "t,i", "t,i,E", 2,
 319    OP_MATCH_ADDI, OP_MASK_IRS|OP_MASK_IOP, NIOS2_INSN_MACRO_MOVI,
 320    signed_immed16_overflow},
 321   /* movia expands to two instructions so there is no mask or match */
 322   {"movia", "t,o", "t,o,E", 2,
 323    OP_MATCH_ORHI, OP_MASK_IOP, NIOS2_INSN_MACRO_MOVIA, no_overflow},
 324   {"mul", "d,s,t", "d,s,t,E", 3,
 325    OP_MATCH_MUL, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 326   {"muli", "t,s,i", "t,s,i,E", 3,
 327    OP_MATCH_MULI, OP_MASK_IOP, 0, signed_immed16_overflow},
 328   {"mulxss", "d,s,t", "d,s,t,E", 3,
 329    OP_MATCH_MULXSS, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 330   {"mulxsu", "d,s,t", "d,s,t,E", 3,
 331    OP_MATCH_MULXSU, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 332   {"mulxuu", "d,s,t", "d,s,t,E", 3,
 333    OP_MATCH_MULXUU, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 334   {"nextpc", "d", "d,E", 1,
 335    OP_MATCH_NEXTPC, OP_MASK_NEXTPC, 0, no_overflow},
 336   {"nop", "", "E", 0,
 337    OP_MATCH_ADD, OP_MASK, NIOS2_INSN_MACRO_MOV, no_overflow},
 338   {"nor", "d,s,t", "d,s,t,E", 3,
 339    OP_MATCH_NOR, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 340   {"or", "d,s,t", "d,s,t,E", 3,
 341    OP_MATCH_OR, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 342   {"orhi", "t,s,u", "t,s,u,E", 3,
 343    OP_MATCH_ORHI, OP_MASK_IOP, 0, unsigned_immed16_overflow},
 344   {"ori", "t,s,u", "t,s,u,E", 3,
 345    OP_MATCH_ORI, OP_MASK_IOP, NIOS2_INSN_ORI, unsigned_immed16_overflow},
 346   {"rdctl", "d,c", "d,c,E", 2,
 347    OP_MATCH_RDCTL, OP_MASK_RDCTL, 0, no_overflow},
 348   {"rdprs", "t,s,i", "t,s,i,E", 3,
 349    OP_MATCH_RDPRS, OP_MASK_IOP, 0, unsigned_immed16_overflow},
 350   {"ret", "", "E", 0,
 351    OP_MATCH_RET, OP_MASK, 0, no_overflow},
 352   {"rol", "d,s,t", "d,s,t,E", 3,
 353    OP_MATCH_ROL, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 354   {"roli", "d,s,j", "d,s,j,E", 3,
 355    OP_MATCH_ROLI, OP_MASK_ROLI, 0, unsigned_immed5_overflow},
 356   {"ror", "d,s,t", "d,s,t,E", 3,
 357    OP_MATCH_ROR, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 358   {"sll", "d,s,t", "d,s,t,E", 3,
 359    OP_MATCH_SLL, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 360   {"slli", "d,s,j", "d,s,j,E", 3,
 361    OP_MATCH_SLLI, OP_MASK_SLLI, 0, unsigned_immed5_overflow},
 362   {"sra", "d,s,t", "d,s,t,E", 3,
 363    OP_MATCH_SRA, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 364   {"srai", "d,s,j", "d,s,j,E", 3,
 365    OP_MATCH_SRAI, OP_MASK_SRAI, 0, unsigned_immed5_overflow},
 366   {"srl", "d,s,t", "d,s,t,E", 3,
 367    OP_MATCH_SRL, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 368   {"srli", "d,s,j", "d,s,j,E", 3,
 369    OP_MATCH_SRLI, OP_MASK_SRLI, 0, unsigned_immed5_overflow},
 370   {"stb", "t,i(s)", "t,i(s)E", 3,
 371    OP_MATCH_STB, OP_MASK_IOP, 0, address_offset_overflow},
 372   {"stbio", "t,i(s)", "t,i(s)E", 3,
 373    OP_MATCH_STBIO, OP_MASK_IOP, 0, address_offset_overflow},
 374   {"stc", "t,i(s)", "t,i(s)E", 3,
 375    OP_MATCH_STC, OP_MASK_IOP, 0, address_offset_overflow},
 376   {"sth", "t,i(s)", "t,i(s)E", 3,
 377    OP_MATCH_STH, OP_MASK_IOP, 0, address_offset_overflow},
 378   {"sthio", "t,i(s)", "t,i(s)E", 3,
 379    OP_MATCH_STHIO, OP_MASK_IOP, 0, address_offset_overflow},
 380   {"stw", "t,i(s)", "t,i(s)E", 3,
 381    OP_MATCH_STW, OP_MASK_IOP, 0, address_offset_overflow},
 382   {"stwio", "t,i(s)", "t,i(s)E", 3,
 383    OP_MATCH_STWIO, OP_MASK_IOP, 0, address_offset_overflow},
 384   {"sub", "d,s,t", "d,s,t,E", 3,
 385    OP_MATCH_SUB, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 386   {"sync", "", "E", 0,
 387    OP_MATCH_SYNC, OP_MASK_SYNC, 0, no_overflow},
 388   {"trap", "", "E", 0,
 389    OP_MATCH_TRAP, OP_MASK_TRAP, 0, no_overflow},
 390   {"eret", "", "E", 0,
 391    OP_MATCH_ERET, OP_MASK, 0, no_overflow},
 392   {"custom", "l,d,s,t", "l,d,s,t,E", 4,
 393    OP_MATCH_CUSTOM, OP_MASK_ROP, 0, custom_opcode_overflow},
 394   {"wrctl", "c,s", "c,s,E", 2,
 395    OP_MATCH_WRCTL, OP_MASK_WRCTL, 0, no_overflow},
 396   {"wrprs", "d,s", "d,s,E", 2,
 397    OP_MATCH_WRPRS, OP_MASK_RRT|OP_MASK_ROPX|OP_MASK_ROP, 0, no_overflow},
 398   {"xor", "d,s,t", "d,s,t,E", 3,
 399    OP_MATCH_XOR, OP_MASK_ROPX | OP_MASK_ROP, 0, no_overflow},
 400   {"xorhi", "t,s,u", "t,s,u,E", 3,
 401    OP_MATCH_XORHI, OP_MASK_IOP, 0, unsigned_immed16_overflow},
 402   {"xori", "t,s,u", "t,s,u,E", 3,
 403    OP_MATCH_XORI, OP_MASK_IOP, NIOS2_INSN_XORI, unsigned_immed16_overflow}
 404 };
 405
 406 #define NIOS2_NUM_OPCODES \
 407        ((sizeof nios2_builtin_opcodes) / (sizeof (nios2_builtin_opcodes[0])))
 408 const int bfd_nios2_num_builtin_opcodes = NIOS2_NUM_OPCODES;
 409
 410 /* This is not const to allow for dynamic extensions to the
 411    built-in instruction set. */
 412 struct nios2_opcode *nios2_opcodes =
 413   (struct nios2_opcode *) nios2_builtin_opcodes;
 414 int bfd_nios2_num_opcodes = NIOS2_NUM_OPCODES;
 415 #undef NIOS2_NUM_OPCODES