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   };
  42
  43 struct op_struct
  44   {
  45     char  opcode[16];
  46     char  mnemonic[16];
  47     char  format[16];
  48     int   mode_bits;
  49     int   min_cpu;
  50
  51     unsigned long long sort_value;
  52     int   no_nibbles;
  53   };
  54
  55 struct op_struct *op_array;
  56 int max_ops;
  57 int no_ops;
  58
  59 static void
  60 createTable (void)
  61 {
  62   max_ops = 256;
  63   op_array = malloc (max_ops * sizeof (struct op_struct));
  64   no_ops = 0;
  65 }
  66
  67 /* `insertOpcode': insert an op_struct into sorted opcode array.  */
  68
  69 static void
  70 insertOpcode (char *opcode, char *mnemonic, char *format,
  71               int min_cpu, int mode_bits)
  72 {
  73   char *str;
  74   unsigned long long sort_value;
  75   int no_nibbles;
  76   int ix, k;
  77
  78   while (no_ops >= max_ops)
  79     {
  80       max_ops = max_ops * 2;
  81       op_array = realloc (op_array, max_ops * sizeof (struct op_struct));
  82     }
  83
  84   sort_value = 0;
  85   str = opcode;
  86   for (ix = 0; ix < 16; ix++)
  87     {
  88       if (*str >= '0' && *str <= '9')
  89         sort_value = (sort_value << 4) + (*str - '0');
  90       else if (*str >= 'a' && *str <= 'f')
  91         sort_value = (sort_value << 4) + (*str - 'a' + 10);
  92       else if (*str >= 'A' && *str <= 'F')
  93         sort_value = (sort_value << 4) + (*str - 'A' + 10);
  94       else if (*str == '?')
  95         sort_value <<= 4;
  96       else
  97         break;
  98       str ++;
  99     }
 100   sort_value <<= 4*(16 - ix);
 101   sort_value += (min_cpu << 8) + mode_bits;
 102   no_nibbles = ix;
 103   for (ix = 0; ix < no_ops; ix++)
 104     if (sort_value > op_array[ix].sort_value)
 105       break;
 106   for (k = no_ops; k > ix; k--)
 107     op_array[k] = op_array[k-1];
 108   strcpy(op_array[ix].opcode, opcode);
 109   strcpy(op_array[ix].mnemonic, mnemonic);
 110   strcpy(op_array[ix].format, format);
 111   op_array[ix].sort_value = sort_value;
 112   op_array[ix].no_nibbles = no_nibbles;
 113   op_array[ix].min_cpu = min_cpu;
 114   op_array[ix].mode_bits = mode_bits;
 115   no_ops++;
 116 }
 117
 118 struct s390_cond_ext_format
 119 {
 120   char nibble;
 121   char extension[4];
 122 };
 123
 124 #define NUM_COND_EXTENSIONS 20
 125
 126 const struct s390_cond_ext_format s390_cond_extensions[NUM_COND_EXTENSIONS] =
 127   {
 128     { '1', "o" },    /* jump on overflow / if ones */
 129     { '2', "h" },    /* jump on A high */
 130     { '2', "p" },    /* jump on plus */
 131     { '3', "nle" },  /* jump on not low or equal */
 132     { '4', "l" },    /* jump on A low */
 133     { '4', "m" },    /* jump on minus / if mixed */
 134     { '5', "nhe" },  /* jump on not high or equal */
 135     { '6', "lh" },   /* jump on low or high */
 136     { '7', "ne" },   /* jump on A not equal B */
 137     { '7', "nz" },   /* jump on not zero / if not zeros */
 138     { '8', "e" },    /* jump on A equal B */
 139     { '8', "z" },    /* jump on zero / if zeros */
 140     { '9', "nlh" },  /* jump on not low or high */
 141     { 'a', "he" },   /* jump on high or equal */
 142     { 'b', "nl" },   /* jump on A not low */
 143     { 'b', "nm" },   /* jump on not minus / if not mixed */
 144     { 'c', "le" },   /* jump on low or equal */
 145     { 'd', "nh" },   /* jump on A not high */
 146     { 'd', "np" },   /* jump on not plus */
 147     { 'e', "no" },   /* jump on not overflow / if not ones */
 148   };
 149
 150 /* As with insertOpcode instructions are added to the sorted opcode
 151    array.  Additionally mnemonics containing the '*<number>' tag are
 152    expanded to the set of conditional instructions described by
 153    s390_cond_extensions with the '*<number>' tag replaced by the
 154    respective mnemonic extensions.  */
 155
 156 static void
 157 expandConditionalJump (char *opcode, char *mnemonic, char *format,
 158                        int min_cpu, int mode_bits)
 159 {
 160   char prefix[5];
 161   char suffix[5];
 162   char number[5];
 163   int mask_start, i = 0, star_found = 0, reading_number = 0;
 164   int number_p = 0, suffix_p = 0, prefix_p = 0;
 165
 166   while (mnemonic[i] != '\0')
 167     {
 168       switch (mnemonic[i])
 169         {
 170         case '*':
 171           if (star_found)
 172             goto malformed_mnemonic;
 173
 174           star_found = 1;
 175           reading_number = 1;
 176           break;
 177
 178         case '0': case '1': case '2': case '3': case '4':
 179         case '5': case '6': case '7': case '8': case '9':
 180           if (!star_found || !reading_number)
 181             goto malformed_mnemonic;
 182
 183           number[number_p++] = mnemonic[i];
 184           break;
 185
 186         default:
 187           if (reading_number)
 188             {
 189               if (!number_p)
 190                 goto malformed_mnemonic;
 191               else
 192                 reading_number = 0;
 193             }
 194
 195           if (star_found)
 196             suffix[suffix_p++] = mnemonic[i];
 197           else
 198             prefix[prefix_p++] = mnemonic[i];
 199         }
 200       i++;
 201     }
 202
 203   prefix[prefix_p] = '\0';
 204   suffix[suffix_p] = '\0';
 205   number[number_p] = '\0';
 206
 207   if (sscanf (number, "%d", &mask_start) != 1)
 208     goto malformed_mnemonic;
 209
 210   if (mask_start & 3)
 211     {
 212       fprintf (stderr, "Conditional mask not at nibble boundary in: %s\n",
 213                mnemonic);
 214       return;
 215     }
 216
 217   mask_start >>= 2;
 218
 219   for (i = 0; i < NUM_COND_EXTENSIONS; i++)
 220     {
 221       char new_mnemonic[15];
 222
 223       strcpy (new_mnemonic, prefix);
 224       strcat (new_mnemonic, s390_cond_extensions[i].extension);
 225       strcat (new_mnemonic, suffix);
 226       opcode[mask_start] = s390_cond_extensions[i].nibble;
 227       insertOpcode (opcode, new_mnemonic, format, min_cpu, mode_bits);
 228     }
 229   return;
 230
 231  malformed_mnemonic:
 232   fprintf (stderr, "Malformed mnemonic: %s\n", mnemonic);
 233 }
 234
 235 static char file_header[] =
 236   "/* The opcode table. This file was generated by s390-mkopc.\n\n"
 237   "   The format of the opcode table is:\n\n"
 238   "   NAME           OPCODE     MASK    OPERANDS\n\n"
 239   "   Name is the name of the instruction.\n"
 240   "   OPCODE is the instruction opcode.\n"
 241   "   MASK is the opcode mask; this is used to tell the disassembler\n"
 242   "     which bits in the actual opcode must match OPCODE.\n"
 243   "   OPERANDS is the list of operands.\n\n"
 244   "   The disassembler reads the table in order and prints the first\n"
 245   "   instruction which matches.  */\n\n"
 246   "const struct s390_opcode s390_opcodes[] =\n  {\n";
 247
 248 /* `dumpTable': write opcode table.  */
 249
 250 static void
 251 dumpTable (void)
 252 {
 253   char *str;
 254   int  ix;
 255
 256   /*  Write hash table entries (slots).  */
 257   printf (file_header);
 258
 259   for (ix = 0; ix < no_ops; ix++)
 260     {
 261       printf ("  { \"%s\", ", op_array[ix].mnemonic);
 262       for (str = op_array[ix].opcode; *str != 0; str++)
 263         if (*str == '?')
 264           *str = '0';
 265       printf ("OP%i(0x%sLL), ",
 266               op_array[ix].no_nibbles*4, op_array[ix].opcode);
 267       printf ("MASK_%s, INSTR_%s, ",
 268               op_array[ix].format, op_array[ix].format);
 269       printf ("%i, ", op_array[ix].mode_bits);
 270       printf ("%i}", op_array[ix].min_cpu);
 271       if (ix < no_ops-1)
 272         printf (",\n");
 273       else
 274         printf ("\n");
 275     }
 276   printf ("};\n\n");
 277   printf ("const int s390_num_opcodes =\n");
 278   printf ("  sizeof (s390_opcodes) / sizeof (s390_opcodes[0]);\n\n");
 279 }
 280
 281 int
 282 main (void)
 283 {
 284   char currentLine[256];
 285
 286   createTable ();
 287
 288   /*  Read opcode descriptions from `stdin'.  For each mnemonic,
 289       make an entry into the opcode table.  */
 290   while (fgets (currentLine, sizeof (currentLine), stdin) != NULL)
 291     {
 292       char  opcode[16];
 293       char  mnemonic[16];
 294       char  format[16];
 295       char  description[64];
 296       char  cpu_string[16];
 297       char  modes_string[16];
 298       int   min_cpu;
 299       int   mode_bits;
 300       char  *str;
 301
 302       if (currentLine[0] == '#')
 303         continue;
 304       memset (opcode, 0, 8);
 305       if (sscanf (currentLine, "%15s %15s %15s \"%[^\"]\" %15s %15s",
 306                   opcode, mnemonic, format, description,
 307                   cpu_string, modes_string) == 6)
 308         {
 309           if (strcmp (cpu_string, "g5") == 0)
 310             min_cpu = S390_OPCODE_G5;
 311           else if (strcmp (cpu_string, "g6") == 0)
 312             min_cpu = S390_OPCODE_G6;
 313           else if (strcmp (cpu_string, "z900") == 0)
 314             min_cpu = S390_OPCODE_Z900;
 315           else if (strcmp (cpu_string, "z990") == 0)
 316             min_cpu = S390_OPCODE_Z990;
 317           else if (strcmp (cpu_string, "z9-109") == 0)
 318             min_cpu = S390_OPCODE_Z9_109;
 319           else if (strcmp (cpu_string, "z9-ec") == 0)
 320             min_cpu = S390_OPCODE_Z9_EC;
 321           else {
 322             fprintf (stderr, "Couldn't parse cpu string %s\n", cpu_string);
 323             exit (1);
 324           }
 325
 326           str = modes_string;
 327           mode_bits = 0;
 328           do {
 329             if (strncmp (str, "esa", 3) == 0
 330                 && (str[3] == 0 || str[3] == ',')) {
 331               mode_bits |= 1 << S390_OPCODE_ESA;
 332               str += 3;
 333             } else if (strncmp (str, "zarch", 5) == 0
 334                        && (str[5] == 0 || str[5] == ',')) {
 335               mode_bits |= 1 << S390_OPCODE_ZARCH;
 336               str += 5;
 337             } else {
 338               fprintf (stderr, "Couldn't parse modes string %s\n",
 339                        modes_string);
 340               exit (1);
 341             }
 342             if (*str == ',')
 343               str++;
 344           } while (*str != 0);
 345
 346           if (!strchr (mnemonic, '*'))
 347             insertOpcode (opcode, mnemonic, format, min_cpu, mode_bits);
 348           else
 349             expandConditionalJump (opcode, mnemonic, format,
 350                                    min_cpu, mode_bits);
 351         }
 352       else
 353         fprintf (stderr, "Couldn't scan line %s\n", currentLine);
 354     }
 355
 356   dumpTable ();
 357   return 0;
 358 }