opcodes/s390-mkopc.c

   1 /* s390-mkopc.c -- Generates opcode table out of s390-opc.txt
   2    Copyright 2000, 2001, 2003 Free Software Foundation, Inc.
   3    Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
   4
   5    This file is part of GDB, GAS, and the GNU binutils.
   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
  20    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 static char file_header[] =
 119   "/* The opcode table. This file was generated by s390-mkopc.\n\n"
 120   "   The format of the opcode table is:\n\n"
 121   "   NAME           OPCODE     MASK    OPERANDS\n\n"
 122   "   Name is the name of the instruction.\n"
 123   "   OPCODE is the instruction opcode.\n"
 124   "   MASK is the opcode mask; this is used to tell the disassembler\n"
 125   "     which bits in the actual opcode must match OPCODE.\n"
 126   "   OPERANDS is the list of operands.\n\n"
 127   "   The disassembler reads the table in order and prints the first\n"
 128   "   instruction which matches.  */\n\n"
 129   "const struct s390_opcode s390_opcodes[] =\n  {\n";
 130
 131 /* `dumpTable': write opcode table.  */
 132
 133 static void
 134 dumpTable (void)
 135 {
 136   char *str;
 137   int  ix;
 138
 139   /*  Write hash table entries (slots).  */
 140   printf (file_header);
 141
 142   for (ix = 0; ix < no_ops; ix++)
 143     {
 144       printf ("  { \"%s\", ", op_array[ix].mnemonic);
 145       for (str = op_array[ix].opcode; *str != 0; str++)
 146         if (*str == '?')
 147           *str = '0';
 148       printf ("OP%i(0x%sLL), ",
 149               op_array[ix].no_nibbles*4, op_array[ix].opcode);
 150       printf ("MASK_%s, INSTR_%s, ",
 151               op_array[ix].format, op_array[ix].format);
 152       printf ("%i, ", op_array[ix].mode_bits);
 153       printf ("%i}", op_array[ix].min_cpu);
 154       if (ix < no_ops-1)
 155         printf (",\n");
 156       else
 157         printf ("\n");
 158     }
 159   printf ("};\n\n");
 160   printf ("const int s390_num_opcodes =\n");
 161   printf ("  sizeof (s390_opcodes) / sizeof (s390_opcodes[0]);\n\n");
 162 }
 163
 164 int
 165 main (void)
 166 {
 167   char currentLine[256];
 168
 169   createTable ();
 170
 171   /*  Read opcode descriptions from `stdin'.  For each mnemonic,
 172       make an entry into the opcode table.  */
 173   while (fgets (currentLine, sizeof (currentLine), stdin) != NULL)
 174     {
 175       char  opcode[16];
 176       char  mnemonic[16];
 177       char  format[16];
 178       char  description[64];
 179       char  cpu_string[16];
 180       char  modes_string[16];
 181       int   min_cpu;
 182       int   mode_bits;
 183       char  *str;
 184
 185       if (currentLine[0] == '#')
 186         continue;
 187       memset (opcode, 0, 8);
 188       if (sscanf (currentLine, "%15s %15s %15s \"%[^\"]\" %15s %15s",
 189                   opcode, mnemonic, format, description,
 190                   cpu_string, modes_string) == 6)
 191         {
 192           if (strcmp (cpu_string, "g5") == 0)
 193             min_cpu = S390_OPCODE_G5;
 194           else if (strcmp (cpu_string, "g6") == 0)
 195             min_cpu = S390_OPCODE_G6;
 196           else if (strcmp (cpu_string, "z900") == 0)
 197             min_cpu = S390_OPCODE_Z900;
 198           else if (strcmp (cpu_string, "z990") == 0)
 199             min_cpu = S390_OPCODE_Z990;
 200           else if (strcmp (cpu_string, "z9-109") == 0)
 201             min_cpu = S390_OPCODE_Z9_109;
 202           else if (strcmp (cpu_string, "z9-ec") == 0)
 203             min_cpu = S390_OPCODE_Z9_EC;
 204           else {
 205             fprintf (stderr, "Couldn't parse cpu string %s\n", cpu_string);
 206             exit (1);
 207           }
 208
 209           str = modes_string;
 210           mode_bits = 0;
 211           do {
 212             if (strncmp (str, "esa", 3) == 0
 213                 && (str[3] == 0 || str[3] == ',')) {
 214               mode_bits |= 1 << S390_OPCODE_ESA;
 215               str += 3;
 216             } else if (strncmp (str, "zarch", 5) == 0
 217                        && (str[5] == 0 || str[5] == ',')) {
 218               mode_bits |= 1 << S390_OPCODE_ZARCH;
 219               str += 5;
 220             } else {
 221               fprintf (stderr, "Couldn't parse modes string %s\n",
 222                        modes_string);
 223               exit (1);
 224             }
 225             if (*str == ',')
 226               str++;
 227           } while (*str != 0);
 228           insertOpcode (opcode, mnemonic, format, min_cpu, mode_bits);
 229         }
 230       else
 231         fprintf (stderr, "Couldn't scan line %s\n", currentLine);
 232     }
 233
 234   dumpTable ();
 235   return 0;
 236 }