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   };
  40
  41 struct op_struct
  42   {
  43     char  opcode[16];
  44     char  mnemonic[16];
  45     char  format[16];
  46     int   mode_bits;
  47     int   min_cpu;
  48
  49     unsigned long long sort_value;
  50     int   no_nibbles;
  51   };
  52
  53 struct op_struct *op_array;
  54 int max_ops;
  55 int no_ops;
  56
  57 static void
  58 createTable (void)
  59 {
  60   max_ops = 256;
  61   op_array = malloc (max_ops * sizeof (struct op_struct));
  62   no_ops = 0;
  63 }
  64
  65 /* `insertOpcode': insert an op_struct into sorted opcode array.  */
  66
  67 static void
  68 insertOpcode (char *opcode, char *mnemonic, char *format,
  69               int min_cpu, int mode_bits)
  70 {
  71   char *str;
  72   unsigned long long sort_value;
  73   int no_nibbles;
  74   int ix, k;
  75
  76   while (no_ops >= max_ops)
  77     {
  78       max_ops = max_ops * 2;
  79       op_array = realloc (op_array, max_ops * sizeof (struct op_struct));
  80     }
  81
  82   sort_value = 0;
  83   str = opcode;
  84   for (ix = 0; ix < 16; ix++)
  85     {
  86       if (*str >= '0' && *str <= '9')
  87         sort_value = (sort_value << 4) + (*str - '0');
  88       else if (*str >= 'a' && *str <= 'f')
  89         sort_value = (sort_value << 4) + (*str - 'a' + 10);
  90       else if (*str >= 'A' && *str <= 'F')
  91         sort_value = (sort_value << 4) + (*str - 'A' + 10);
  92       else if (*str == '?')
  93         sort_value <<= 4;
  94       else
  95         break;
  96       str ++;
  97     }
  98   sort_value <<= 4*(16 - ix);
  99   sort_value += (min_cpu << 8) + mode_bits;
 100   no_nibbles = ix;
 101   for (ix = 0; ix < no_ops; ix++)
 102     if (sort_value > op_array[ix].sort_value)
 103       break;
 104   for (k = no_ops; k > ix; k--)
 105     op_array[k] = op_array[k-1];
 106   strcpy(op_array[ix].opcode, opcode);
 107   strcpy(op_array[ix].mnemonic, mnemonic);
 108   strcpy(op_array[ix].format, format);
 109   op_array[ix].sort_value = sort_value;
 110   op_array[ix].no_nibbles = no_nibbles;
 111   op_array[ix].min_cpu = min_cpu;
 112   op_array[ix].mode_bits = mode_bits;
 113   no_ops++;
 114 }
 115
 116 static char file_header[] =
 117   "/* The opcode table. This file was generated by s390-mkopc.\n\n"
 118   "   The format of the opcode table is:\n\n"
 119   "   NAME           OPCODE     MASK    OPERANDS\n\n"
 120   "   Name is the name of the instruction.\n"
 121   "   OPCODE is the instruction opcode.\n"
 122   "   MASK is the opcode mask; this is used to tell the disassembler\n"
 123   "     which bits in the actual opcode must match OPCODE.\n"
 124   "   OPERANDS is the list of operands.\n\n"
 125   "   The disassembler reads the table in order and prints the first\n"
 126   "   instruction which matches.  */\n\n"
 127   "const struct s390_opcode s390_opcodes[] =\n  {\n";
 128
 129 /* `dumpTable': write opcode table.  */
 130
 131 static void
 132 dumpTable (void)
 133 {
 134   char *str;
 135   int  ix;
 136
 137   /*  Write hash table entries (slots).  */
 138   printf (file_header);
 139
 140   for (ix = 0; ix < no_ops; ix++)
 141     {
 142       printf ("  { \"%s\", ", op_array[ix].mnemonic);
 143       for (str = op_array[ix].opcode; *str != 0; str++)
 144         if (*str == '?')
 145           *str = '0';
 146       printf ("OP%i(0x%sLL), ",
 147               op_array[ix].no_nibbles*4, op_array[ix].opcode);
 148       printf ("MASK_%s, INSTR_%s, ",
 149               op_array[ix].format, op_array[ix].format);
 150       printf ("%i, ", op_array[ix].mode_bits);
 151       printf ("%i}", op_array[ix].min_cpu);
 152       if (ix < no_ops-1)
 153         printf (",\n");
 154       else
 155         printf ("\n");
 156     }
 157   printf ("};\n\n");
 158   printf ("const int s390_num_opcodes =\n");
 159   printf ("  sizeof (s390_opcodes) / sizeof (s390_opcodes[0]);\n\n");
 160 }
 161
 162 int
 163 main (void)
 164 {
 165   char currentLine[256];
 166
 167   createTable ();
 168
 169   /*  Read opcode descriptions from `stdin'.  For each mnemonic,
 170       make an entry into the opcode table.  */
 171   while (fgets (currentLine, sizeof (currentLine), stdin) != NULL)
 172     {
 173       char  opcode[16];
 174       char  mnemonic[16];
 175       char  format[16];
 176       char  description[64];
 177       char  cpu_string[16];
 178       char  modes_string[16];
 179       int   min_cpu;
 180       int   mode_bits;
 181       char  *str;
 182
 183       if (currentLine[0] == '#')
 184         continue;
 185       memset (opcode, 0, 8);
 186       if (sscanf (currentLine, "%15s %15s %15s \"%[^\"]\" %15s %15s",
 187                   opcode, mnemonic, format, description,
 188                   cpu_string, modes_string) == 6)
 189         {
 190           if (strcmp (cpu_string, "g5") == 0)
 191             min_cpu = S390_OPCODE_G5;
 192           else if (strcmp (cpu_string, "g6") == 0)
 193             min_cpu = S390_OPCODE_G6;
 194           else if (strcmp (cpu_string, "z900") == 0)
 195             min_cpu = S390_OPCODE_Z900;
 196           else if (strcmp (cpu_string, "z990") == 0)
 197             min_cpu = S390_OPCODE_Z990;
 198           else {
 199             fprintf (stderr, "Couldn't parse cpu string %s\n", cpu_string);
 200             exit (1);
 201           }
 202
 203           str = modes_string;
 204           mode_bits = 0;
 205           do {
 206             if (strncmp (str, "esa", 3) == 0
 207                 && (str[3] == 0 || str[3] == ',')) {
 208               mode_bits |= 1 << S390_OPCODE_ESA;
 209               str += 3;
 210             } else if (strncmp (str, "zarch", 5) == 0
 211                        && (str[5] == 0 || str[5] == ',')) {
 212               mode_bits |= 1 << S390_OPCODE_ZARCH;
 213               str += 5;
 214             } else {
 215               fprintf (stderr, "Couldn't parse modes string %s\n",
 216                        modes_string);
 217               exit (1);
 218             }
 219             if (*str == ',')
 220               str++;
 221           } while (*str != 0);
 222           insertOpcode (opcode, mnemonic, format, min_cpu, mode_bits);
 223         }
 224       else
 225         fprintf (stderr, "Couldn't scan line %s\n", currentLine);
 226     }
 227
 228   dumpTable ();
 229   return 0;
 230 }