opcodes/s390-mkopc.c

   1 /* s390-mkopc.c -- Generates opcode table out of s390-opc.txt
   2    Copyright 2000, 2001, 2003, 2007, 2008 Free Software Foundation, Inc.
   3    Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
   4
   5    This file is part of the GNU opcodes library.
   6
   7    This library 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 3, or (at your option)
  10    any later version.
  11
  12    It is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this file; see the file COPYING.  If not, write to the
  19    Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 /* Taken from opcodes/s390.h */
  27 enum s390_opcode_mode_val
  28   {
  29     S390_OPCODE_ESA = 0,
  30     S390_OPCODE_ZARCH
  31   };
  32
  33 enum s390_opcode_cpu_val
  34   {
  35     S390_OPCODE_G5 = 0,
  36     S390_OPCODE_G6,
  37     S390_OPCODE_Z900,
  38     S390_OPCODE_Z990,
  39     S390_OPCODE_Z9_109,
  40     S390_OPCODE_Z9_EC,
  41     S390_OPCODE_Z10
  42   };
  43
  44 struct op_struct
  45   {
  46     char  opcode[16];
  47     char  mnemonic[16];
  48     char  format[16];
  49     int   mode_bits;
  50     int   min_cpu;
  51
  52     unsigned long long sort_value;
  53     int   no_nibbles;
  54   };
  55
  56 struct op_struct *op_array;
  57 int max_ops;
  58 int no_ops;
  59
  60 static void
  61 createTable (void)
  62 {
  63   max_ops = 256;
  64   op_array = malloc (max_ops * sizeof (struct op_struct));
  65   no_ops = 0;
  66 }
  67
  68 /* `insertOpcode': insert an op_struct into sorted opcode array.  */
  69
  70 static void
  71 insertOpcode (char *opcode, char *mnemonic, char *format,
  72               int min_cpu, int mode_bits)
  73 {
  74   char *str;
  75   unsigned long long sort_value;
  76   int no_nibbles;
  77   int ix, k;
  78
  79   while (no_ops >= max_ops)
  80     {
  81       max_ops = max_ops * 2;
  82       op_array = realloc (op_array, max_ops * sizeof (struct op_struct));
  83     }
  84
  85   sort_value = 0;
  86   str = opcode;
  87   for (ix = 0; ix < 16; ix++)
  88     {
  89       if (*str >= '0' && *str <= '9')
  90         sort_value = (sort_value << 4) + (*str - '0');
  91       else if (*str >= 'a' && *str <= 'f')
  92         sort_value = (sort_value << 4) + (*str - 'a' + 10);
  93       else if (*str >= 'A' && *str <= 'F')
  94         sort_value = (sort_value << 4) + (*str - 'A' + 10);
  95       else if (*str == '?')
  96         sort_value <<= 4;
  97       else
  98         break;
  99       str ++;
 100     }
 101   sort_value <<= 4*(16 - ix);
 102   sort_value += (min_cpu << 8) + mode_bits;
 103   no_nibbles = ix;
 104   for (ix = 0; ix < no_ops; ix++)
 105     if (sort_value > op_array[ix].sort_value)
 106       break;
 107   for (k = no_ops; k > ix; k--)
 108     op_array[k] = op_array[k-1];
 109   strcpy(op_array[ix].opcode, opcode);
 110   strcpy(op_array[ix].mnemonic, mnemonic);
 111   strcpy(op_array[ix].format, format);
 112   op_array[ix].sort_value = sort_value;
 113   op_array[ix].no_nibbles = no_nibbles;
 114   op_array[ix].min_cpu = min_cpu;
 115   op_array[ix].mode_bits = mode_bits;
 116   no_ops++;
 117 }
 118
 119 struct s390_cond_ext_format
 120 {
 121   char nibble;
 122   char extension[4];
 123 };
 124
 125 /* The mnemonic extensions for conditional jumps used to replace
 126    the '*' tag.  */
 127 #define NUM_COND_EXTENSIONS 20
 128 const struct s390_cond_ext_format s390_cond_extensions[NUM_COND_EXTENSIONS] =
 129 { { '1', "o" },    /* jump on overflow / if ones */
 130   { '2', "h" },    /* jump on A high */
 131   { '2', "p" },    /* jump on plus */
 132   { '3', "nle" },  /* jump on not low or equal */
 133   { '4', "l" },    /* jump on A low */
 134   { '4', "m" },    /* jump on minus / if mixed */
 135   { '5', "nhe" },  /* jump on not high or equal */
 136   { '6', "lh" },   /* jump on low or high */
 137   { '7', "ne" },   /* jump on A not equal B */
 138   { '7', "nz" },   /* jump on not zero / if not zeros */
 139   { '8', "e" },    /* jump on A equal B */
 140   { '8', "z" },    /* jump on zero / if zeros */
 141   { '9', "nlh" },  /* jump on not low or high */
 142   { 'a', "he" },   /* jump on high or equal */
 143   { 'b', "nl" },   /* jump on A not low */
 144   { 'b', "nm" },   /* jump on not minus / if not mixed */
 145   { 'c', "le" },   /* jump on low or equal */
 146   { 'd', "nh" },   /* jump on A not high */
 147   { 'd', "np" },   /* jump on not plus */
 148   { 'e', "no" },   /* jump on not overflow / if not ones */
 149 };
 150
 151 /* The mnemonic extensions for conditional branches used to replace
 152    the '$' tag.  */
 153 #define NUM_CRB_EXTENSIONS 12
 154 const struct s390_cond_ext_format s390_crb_extensions[NUM_CRB_EXTENSIONS] =
 155 { { '2', "h" },    /* jump on A high */
 156   { '2', "nle" },  /* jump on not low or equal */
 157   { '4', "l" },    /* jump on A low */
 158   { '4', "nhe" },  /* jump on not high or equal */
 159   { '6', "ne" },   /* jump on A not equal B */
 160   { '6', "lh" },   /* jump on low or high */
 161   { '8', "e" },    /* jump on A equal B */
 162   { '8', "nlh" },  /* jump on not low or high */
 163   { 'a', "nl" },   /* jump on A not low */
 164   { 'a', "he" },   /* jump on high or equal */
 165   { 'c', "nh" },   /* jump on A not high */
 166   { 'c', "le" },   /* jump on low or equal */
 167 };
 168
 169 /* As with insertOpcode instructions are added to the sorted opcode
 170    array.  Additionally mnemonics containing the '*<number>' tag are
 171    expanded to the set of conditional instructions described by
 172    s390_cond_extensions with the tag replaced by the respective
 173    mnemonic extensions.  */
 174
 175 static void
 176 insertExpandedMnemonic (char *opcode, char *mnemonic, char *format,
 177                         int min_cpu, int mode_bits)
 178 {
 179   char *tag;
 180   char prefix[15];
 181   char suffix[15];
 182   char number[15];
 183   int mask_start, i = 0, tag_found = 0, reading_number = 0;
 184   int number_p = 0, suffix_p = 0, prefix_p = 0;
 185   const struct s390_cond_ext_format *ext_table;
 186   int ext_table_length;
 187
 188   if (!(tag = strpbrk (mnemonic, "*$")))
 189     {
 190       insertOpcode (opcode, mnemonic, format, min_cpu, mode_bits);
 191       return;
 192     }
 193
 194   while (mnemonic[i] != '\0')
 195     {
 196       if (mnemonic[i] == *tag)
 197         {
 198           if (tag_found)
 199             goto malformed_mnemonic;
 200
 201           tag_found = 1;
 202           reading_number = 1;
 203         }
 204       else
 205         switch (mnemonic[i])
 206           {
 207           case '0': case '1': case '2': case '3': case '4':
 208           case '5': case '6': case '7': case '8': case '9':
 209             if (!tag_found || !reading_number)
 210               goto malformed_mnemonic;
 211
 212             number[number_p++] = mnemonic[i];
 213             break;
 214
 215           default:
 216             if (reading_number)
 217               {
 218                 if (!number_p)
 219                   goto malformed_mnemonic;
 220                 else
 221                   reading_number = 0;
 222               }
 223
 224             if (tag_found)
 225               suffix[suffix_p++] = mnemonic[i];
 226             else
 227               prefix[prefix_p++] = mnemonic[i];
 228           }
 229       i++;
 230     }
 231
 232   prefix[prefix_p] = '\0';
 233   suffix[suffix_p] = '\0';
 234   number[number_p] = '\0';
 235
 236   if (sscanf (number, "%d", &mask_start) != 1)
 237     goto malformed_mnemonic;
 238
 239   if (mask_start & 3)
 240     {
 241       fprintf (stderr, "Conditional mask not at nibble boundary in: %s\n",
 242                mnemonic);
 243       return;
 244     }
 245
 246   mask_start >>= 2;
 247
 248   switch (*tag)
 249     {
 250     case '*':
 251       ext_table = s390_cond_extensions;
 252       ext_table_length = NUM_COND_EXTENSIONS;
 253       break;
 254     case '$':
 255       ext_table = s390_crb_extensions;
 256       ext_table_length = NUM_CRB_EXTENSIONS;
 257       break;
 258     default: fprintf (stderr, "Unknown tag char: %c\n", *tag);
 259     }
 260
 261   for (i = 0; i < ext_table_length; i++)
 262     {
 263       char new_mnemonic[15];
 264
 265       strcpy (new_mnemonic, prefix);
 266       opcode[mask_start] = ext_table[i].nibble;
 267       strcat (new_mnemonic, ext_table[i].extension);
 268       strcat (new_mnemonic, suffix);
 269       insertOpcode (opcode, new_mnemonic, format, min_cpu, mode_bits);
 270     }
 271   return;
 272
 273  malformed_mnemonic:
 274   fprintf (stderr, "Malformed mnemonic: %s\n", mnemonic);
 275 }
 276
 277 static char file_header[] =
 278   "/* The opcode table. This file was generated by s390-mkopc.\n\n"
 279   "   The format of the opcode table is:\n\n"
 280   "   NAME           OPCODE     MASK    OPERANDS\n\n"
 281   "   Name is the name of the instruction.\n"
 282   "   OPCODE is the instruction opcode.\n"
 283   "   MASK is the opcode mask; this is used to tell the disassembler\n"
 284   "     which bits in the actual opcode must match OPCODE.\n"
 285   "   OPERANDS is the list of operands.\n\n"
 286   "   The disassembler reads the table in order and prints the first\n"
 287   "   instruction which matches.  */\n\n"
 288   "const struct s390_opcode s390_opcodes[] =\n  {\n";
 289
 290 /* `dumpTable': write opcode table.  */
 291
 292 static void
 293 dumpTable (void)
 294 {
 295   char *str;
 296   int  ix;
 297
 298   /*  Write hash table entries (slots).  */
 299   printf (file_header);
 300
 301   for (ix = 0; ix < no_ops; ix++)
 302     {
 303       printf ("  { \"%s\", ", op_array[ix].mnemonic);
 304       for (str = op_array[ix].opcode; *str != 0; str++)
 305         if (*str == '?')
 306           *str = '0';
 307       printf ("OP%i(0x%sLL), ",
 308               op_array[ix].no_nibbles*4, op_array[ix].opcode);
 309       printf ("MASK_%s, INSTR_%s, ",
 310               op_array[ix].format, op_array[ix].format);
 311       printf ("%i, ", op_array[ix].mode_bits);
 312       printf ("%i}", op_array[ix].min_cpu);
 313       if (ix < no_ops-1)
 314         printf (",\n");
 315       else
 316         printf ("\n");
 317     }
 318   printf ("};\n\n");
 319   printf ("const int s390_num_opcodes =\n");
 320   printf ("  sizeof (s390_opcodes) / sizeof (s390_opcodes[0]);\n\n");
 321 }
 322
 323 int
 324 main (void)
 325 {
 326   char currentLine[256];
 327
 328   createTable ();
 329
 330   /*  Read opcode descriptions from `stdin'.  For each mnemonic,
 331       make an entry into the opcode table.  */
 332   while (fgets (currentLine, sizeof (currentLine), stdin) != NULL)
 333     {
 334       char  opcode[16];
 335       char  mnemonic[16];
 336       char  format[16];
 337       char  description[64];
 338       char  cpu_string[16];
 339       char  modes_string[16];
 340       int   min_cpu;
 341       int   mode_bits;
 342       char  *str;
 343
 344       if (currentLine[0] == '#')
 345         continue;
 346       memset (opcode, 0, 8);
 347       if (sscanf (currentLine, "%15s %15s %15s \"%[^\"]\" %15s %15s",
 348                   opcode, mnemonic, format, description,
 349                   cpu_string, modes_string) == 6)
 350         {
 351           if (strcmp (cpu_string, "g5") == 0)
 352             min_cpu = S390_OPCODE_G5;
 353           else if (strcmp (cpu_string, "g6") == 0)
 354             min_cpu = S390_OPCODE_G6;
 355           else if (strcmp (cpu_string, "z900") == 0)
 356             min_cpu = S390_OPCODE_Z900;
 357           else if (strcmp (cpu_string, "z990") == 0)
 358             min_cpu = S390_OPCODE_Z990;
 359           else if (strcmp (cpu_string, "z9-109") == 0)
 360             min_cpu = S390_OPCODE_Z9_109;
 361           else if (strcmp (cpu_string, "z9-ec") == 0)
 362             min_cpu = S390_OPCODE_Z9_EC;
 363           else if (strcmp (cpu_string, "z10") == 0)
 364             min_cpu = S390_OPCODE_Z10;
 365           else {
 366             fprintf (stderr, "Couldn't parse cpu string %s\n", cpu_string);
 367             exit (1);
 368           }
 369
 370           str = modes_string;
 371           mode_bits = 0;
 372           do {
 373             if (strncmp (str, "esa", 3) == 0
 374                 && (str[3] == 0 || str[3] == ',')) {
 375               mode_bits |= 1 << S390_OPCODE_ESA;
 376               str += 3;
 377             } else if (strncmp (str, "zarch", 5) == 0
 378                        && (str[5] == 0 || str[5] == ',')) {
 379               mode_bits |= 1 << S390_OPCODE_ZARCH;
 380               str += 5;
 381             } else {
 382               fprintf (stderr, "Couldn't parse modes string %s\n",
 383                        modes_string);
 384               exit (1);
 385             }
 386             if (*str == ',')
 387               str++;
 388           } while (*str != 0);
 389
 390           insertExpandedMnemonic (opcode, mnemonic, format, min_cpu, mode_bits);
 391         }
 392       else
 393         fprintf (stderr, "Couldn't scan line %s\n", currentLine);
 394     }
 395
 396   dumpTable ();
 397   return 0;
 398 }