opcodes/s390-mkopc.c

   1 /* s390-mkopc.c -- Generates opcode table out of s390-opc.txt
   2    Copyright 2000, 2001, 2003, 2007 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 branches used to replace
 126    the '*' tag.  */
 127 #define NUM_COND_EXTENSIONS 12
 128 const struct s390_cond_ext_format s390_cond_extensions[NUM_COND_EXTENSIONS] =
 129 { { '2', "h" },    /* jump on A high */
 130   { '3', "nle" },  /* jump on not low or equal */
 131   { '4', "l" },    /* jump on A low */
 132   { '5', "nhe" },  /* jump on not high or equal */
 133   { '6', "lh" },   /* jump on low or high */
 134   { '7', "ne" },   /* jump on A not equal B */
 135   { '8', "e" },    /* jump on A equal B */
 136   { '9', "nlh" },  /* jump on not low or high */
 137   { 'a', "he" },   /* jump on high or equal */
 138   { 'b', "nl" },   /* jump on A not low */
 139   { 'c', "le" },   /* jump on low or equal */
 140   { 'd', "nh" },   /* jump on A not high */
 141 };
 142
 143 /* As with insertOpcode instructions are added to the sorted opcode
 144    array.  Additionally mnemonics containing the '*<number>' tag are
 145    expanded to the set of conditional instructions described by
 146    s390_cond_extensions with the tag replaced by the respective
 147    mnemonic extensions.  */
 148
 149 static void
 150 insertExpandedMnemonic (char *opcode, char *mnemonic, char *format,
 151                         int min_cpu, int mode_bits)
 152 {
 153   char *tag;
 154   char prefix[5];
 155   char suffix[5];
 156   char number[5];
 157   int mask_start, i = 0, tag_found = 0, reading_number = 0;
 158   int number_p = 0, suffix_p = 0, prefix_p = 0;
 159
 160   if (!(tag = strchr (mnemonic, '*')))
 161     {
 162       insertOpcode (opcode, mnemonic, format, min_cpu, mode_bits);
 163       return;
 164     }
 165
 166   while (mnemonic[i] != '\0')
 167     {
 168       if (mnemonic[i] == *tag)
 169         {
 170           if (tag_found)
 171             goto malformed_mnemonic;
 172
 173           tag_found = 1;
 174           reading_number = 1;
 175         }
 176       else
 177         switch (mnemonic[i])
 178           {
 179           case '0': case '1': case '2': case '3': case '4':
 180           case '5': case '6': case '7': case '8': case '9':
 181             if (!tag_found || !reading_number)
 182               goto malformed_mnemonic;
 183
 184             number[number_p++] = mnemonic[i];
 185             break;
 186
 187           default:
 188             if (reading_number)
 189               {
 190                 if (!number_p)
 191                   goto malformed_mnemonic;
 192                 else
 193                   reading_number = 0;
 194               }
 195
 196             if (tag_found)
 197               suffix[suffix_p++] = mnemonic[i];
 198             else
 199               prefix[prefix_p++] = mnemonic[i];
 200           }
 201       i++;
 202     }
 203
 204   prefix[prefix_p] = '\0';
 205   suffix[suffix_p] = '\0';
 206   number[number_p] = '\0';
 207
 208   if (sscanf (number, "%d", &mask_start) != 1)
 209     goto malformed_mnemonic;
 210
 211   if (mask_start & 3)
 212     {
 213       fprintf (stderr, "Conditional mask not at nibble boundary in: %s\n",
 214                mnemonic);
 215       return;
 216     }
 217
 218   mask_start >>= 2;
 219
 220   for (i = 0; i < NUM_COND_EXTENSIONS; i++)
 221     {
 222       char new_mnemonic[15];
 223
 224       strcpy (new_mnemonic, prefix);
 225       opcode[mask_start] = s390_cond_extensions[i].nibble;
 226       strcat (new_mnemonic, s390_cond_extensions[i].extension);
 227       strcat (new_mnemonic, suffix);
 228       insertOpcode (opcode, new_mnemonic, format, min_cpu, mode_bits);
 229     }
 230   return;
 231
 232  malformed_mnemonic:
 233   fprintf (stderr, "Malformed mnemonic: %s\n", mnemonic);
 234 }
 235
 236 static char file_header[] =
 237   "/* The opcode table. This file was generated by s390-mkopc.\n\n"
 238   "   The format of the opcode table is:\n\n"
 239   "   NAME           OPCODE     MASK    OPERANDS\n\n"
 240   "   Name is the name of the instruction.\n"
 241   "   OPCODE is the instruction opcode.\n"
 242   "   MASK is the opcode mask; this is used to tell the disassembler\n"
 243   "     which bits in the actual opcode must match OPCODE.\n"
 244   "   OPERANDS is the list of operands.\n\n"
 245   "   The disassembler reads the table in order and prints the first\n"
 246   "   instruction which matches.  */\n\n"
 247   "const struct s390_opcode s390_opcodes[] =\n  {\n";
 248
 249 /* `dumpTable': write opcode table.  */
 250
 251 static void
 252 dumpTable (void)
 253 {
 254   char *str;
 255   int  ix;
 256
 257   /*  Write hash table entries (slots).  */
 258   printf (file_header);
 259
 260   for (ix = 0; ix < no_ops; ix++)
 261     {
 262       printf ("  { \"%s\", ", op_array[ix].mnemonic);
 263       for (str = op_array[ix].opcode; *str != 0; str++)
 264         if (*str == '?')
 265           *str = '0';
 266       printf ("OP%i(0x%sLL), ",
 267               op_array[ix].no_nibbles*4, op_array[ix].opcode);
 268       printf ("MASK_%s, INSTR_%s, ",
 269               op_array[ix].format, op_array[ix].format);
 270       printf ("%i, ", op_array[ix].mode_bits);
 271       printf ("%i}", op_array[ix].min_cpu);
 272       if (ix < no_ops-1)
 273         printf (",\n");
 274       else
 275         printf ("\n");
 276     }
 277   printf ("};\n\n");
 278   printf ("const int s390_num_opcodes =\n");
 279   printf ("  sizeof (s390_opcodes) / sizeof (s390_opcodes[0]);\n\n");
 280 }
 281
 282 int
 283 main (void)
 284 {
 285   char currentLine[256];
 286
 287   createTable ();
 288
 289   /*  Read opcode descriptions from `stdin'.  For each mnemonic,
 290       make an entry into the opcode table.  */
 291   while (fgets (currentLine, sizeof (currentLine), stdin) != NULL)
 292     {
 293       char  opcode[16];
 294       char  mnemonic[16];
 295       char  format[16];
 296       char  description[64];
 297       char  cpu_string[16];
 298       char  modes_string[16];
 299       int   min_cpu;
 300       int   mode_bits;
 301       char  *str;
 302
 303       if (currentLine[0] == '#')
 304         continue;
 305       memset (opcode, 0, 8);
 306       if (sscanf (currentLine, "%15s %15s %15s \"%[^\"]\" %15s %15s",
 307                   opcode, mnemonic, format, description,
 308                   cpu_string, modes_string) == 6)
 309         {
 310           if (strcmp (cpu_string, "g5") == 0)
 311             min_cpu = S390_OPCODE_G5;
 312           else if (strcmp (cpu_string, "g6") == 0)
 313             min_cpu = S390_OPCODE_G6;
 314           else if (strcmp (cpu_string, "z900") == 0)
 315             min_cpu = S390_OPCODE_Z900;
 316           else if (strcmp (cpu_string, "z990") == 0)
 317             min_cpu = S390_OPCODE_Z990;
 318           else if (strcmp (cpu_string, "z9-109") == 0)
 319             min_cpu = S390_OPCODE_Z9_109;
 320           else if (strcmp (cpu_string, "z9-ec") == 0)
 321             min_cpu = S390_OPCODE_Z9_EC;
 322           else if (strcmp (cpu_string, "z10") == 0)
 323             min_cpu = S390_OPCODE_Z10;
 324           else {
 325             fprintf (stderr, "Couldn't parse cpu string %s\n", cpu_string);
 326             exit (1);
 327           }
 328
 329           str = modes_string;
 330           mode_bits = 0;
 331           do {
 332             if (strncmp (str, "esa", 3) == 0
 333                 && (str[3] == 0 || str[3] == ',')) {
 334               mode_bits |= 1 << S390_OPCODE_ESA;
 335               str += 3;
 336             } else if (strncmp (str, "zarch", 5) == 0
 337                        && (str[5] == 0 || str[5] == ',')) {
 338               mode_bits |= 1 << S390_OPCODE_ZARCH;
 339               str += 5;
 340             } else {
 341               fprintf (stderr, "Couldn't parse modes string %s\n",
 342                        modes_string);
 343               exit (1);
 344             }
 345             if (*str == ',')
 346               str++;
 347           } while (*str != 0);
 348
 349           insertExpandedMnemonic (opcode, mnemonic, format, min_cpu, mode_bits);
 350         }
 351       else
 352         fprintf (stderr, "Couldn't scan line %s\n", currentLine);
 353     }
 354
 355   dumpTable ();
 356   return 0;
 357 }