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   };
  41
  42 struct op_struct
  43   {
  44     char  opcode[16];
  45     char  mnemonic[16];
  46     char  format[16];
  47     int   mode_bits;
  48     int   min_cpu;
  49
  50     unsigned long long sort_value;
  51     int   no_nibbles;
  52   };
  53
  54 struct op_struct *op_array;
  55 int max_ops;
  56 int no_ops;
  57
  58 static void
  59 createTable (void)
  60 {
  61   max_ops = 256;
  62   op_array = malloc (max_ops * sizeof (struct op_struct));
  63   no_ops = 0;
  64 }
  65
  66 /* `insertOpcode': insert an op_struct into sorted opcode array.  */
  67
  68 static void
  69 insertOpcode (char *opcode, char *mnemonic, char *format,
  70               int min_cpu, int mode_bits)
  71 {
  72   char *str;
  73   unsigned long long sort_value;
  74   int no_nibbles;
  75   int ix, k;
  76
  77   while (no_ops >= max_ops)
  78     {
  79       max_ops = max_ops * 2;
  80       op_array = realloc (op_array, max_ops * sizeof (struct op_struct));
  81     }
  82
  83   sort_value = 0;
  84   str = opcode;
  85   for (ix = 0; ix < 16; ix++)
  86     {
  87       if (*str >= '0' && *str <= '9')
  88         sort_value = (sort_value << 4) + (*str - '0');
  89       else if (*str >= 'a' && *str <= 'f')
  90         sort_value = (sort_value << 4) + (*str - 'a' + 10);
  91       else if (*str >= 'A' && *str <= 'F')
  92         sort_value = (sort_value << 4) + (*str - 'A' + 10);
  93       else if (*str == '?')
  94         sort_value <<= 4;
  95       else
  96         break;
  97       str ++;
  98     }
  99   sort_value <<= 4*(16 - ix);
 100   sort_value += (min_cpu << 8) + mode_bits;
 101   no_nibbles = ix;
 102   for (ix = 0; ix < no_ops; ix++)
 103     if (sort_value > op_array[ix].sort_value)
 104       break;
 105   for (k = no_ops; k > ix; k--)
 106     op_array[k] = op_array[k-1];
 107   strcpy(op_array[ix].opcode, opcode);
 108   strcpy(op_array[ix].mnemonic, mnemonic);
 109   strcpy(op_array[ix].format, format);
 110   op_array[ix].sort_value = sort_value;
 111   op_array[ix].no_nibbles = no_nibbles;
 112   op_array[ix].min_cpu = min_cpu;
 113   op_array[ix].mode_bits = mode_bits;
 114   no_ops++;
 115 }
 116
 117 static char file_header[] =
 118   "/* The opcode table. This file was generated by s390-mkopc.\n\n"
 119   "   The format of the opcode table is:\n\n"
 120   "   NAME           OPCODE     MASK    OPERANDS\n\n"
 121   "   Name is the name of the instruction.\n"
 122   "   OPCODE is the instruction opcode.\n"
 123   "   MASK is the opcode mask; this is used to tell the disassembler\n"
 124   "     which bits in the actual opcode must match OPCODE.\n"
 125   "   OPERANDS is the list of operands.\n\n"
 126   "   The disassembler reads the table in order and prints the first\n"
 127   "   instruction which matches.  */\n\n"
 128   "const struct s390_opcode s390_opcodes[] =\n  {\n";
 129
 130 /* `dumpTable': write opcode table.  */
 131
 132 static void
 133 dumpTable (void)
 134 {
 135   char *str;
 136   int  ix;
 137
 138   /*  Write hash table entries (slots).  */
 139   printf (file_header);
 140
 141   for (ix = 0; ix < no_ops; ix++)
 142     {
 143       printf ("  { \"%s\", ", op_array[ix].mnemonic);
 144       for (str = op_array[ix].opcode; *str != 0; str++)
 145         if (*str == '?')
 146           *str = '0';
 147       printf ("OP%i(0x%sLL), ",
 148               op_array[ix].no_nibbles*4, op_array[ix].opcode);
 149       printf ("MASK_%s, INSTR_%s, ",
 150               op_array[ix].format, op_array[ix].format);
 151       printf ("%i, ", op_array[ix].mode_bits);
 152       printf ("%i}", op_array[ix].min_cpu);
 153       if (ix < no_ops-1)
 154         printf (",\n");
 155       else
 156         printf ("\n");
 157     }
 158   printf ("};\n\n");
 159   printf ("const int s390_num_opcodes =\n");
 160   printf ("  sizeof (s390_opcodes) / sizeof (s390_opcodes[0]);\n\n");
 161 }
 162
 163 int
 164 main (void)
 165 {
 166   char currentLine[256];
 167
 168   createTable ();
 169
 170   /*  Read opcode descriptions from `stdin'.  For each mnemonic,
 171       make an entry into the opcode table.  */
 172   while (fgets (currentLine, sizeof (currentLine), stdin) != NULL)
 173     {
 174       char  opcode[16];
 175       char  mnemonic[16];
 176       char  format[16];
 177       char  description[64];
 178       char  cpu_string[16];
 179       char  modes_string[16];
 180       int   min_cpu;
 181       int   mode_bits;
 182       char  *str;
 183
 184       if (currentLine[0] == '#')
 185         continue;
 186       memset (opcode, 0, 8);
 187       if (sscanf (currentLine, "%15s %15s %15s \"%[^\"]\" %15s %15s",
 188                   opcode, mnemonic, format, description,
 189                   cpu_string, modes_string) == 6)
 190         {
 191           if (strcmp (cpu_string, "g5") == 0)
 192             min_cpu = S390_OPCODE_G5;
 193           else if (strcmp (cpu_string, "g6") == 0)
 194             min_cpu = S390_OPCODE_G6;
 195           else if (strcmp (cpu_string, "z900") == 0)
 196             min_cpu = S390_OPCODE_Z900;
 197           else if (strcmp (cpu_string, "z990") == 0)
 198             min_cpu = S390_OPCODE_Z990;
 199           else if (strcmp (cpu_string, "z9-109") == 0)
 200             min_cpu = S390_OPCODE_Z9_109;
 201           else {
 202             fprintf (stderr, "Couldn't parse cpu string %s\n", cpu_string);
 203             exit (1);
 204           }
 205
 206           str = modes_string;
 207           mode_bits = 0;
 208           do {
 209             if (strncmp (str, "esa", 3) == 0
 210                 && (str[3] == 0 || str[3] == ',')) {
 211               mode_bits |= 1 << S390_OPCODE_ESA;
 212               str += 3;
 213             } else if (strncmp (str, "zarch", 5) == 0
 214                        && (str[5] == 0 || str[5] == ',')) {
 215               mode_bits |= 1 << S390_OPCODE_ZARCH;
 216               str += 5;
 217             } else {
 218               fprintf (stderr, "Couldn't parse modes string %s\n",
 219                        modes_string);
 220               exit (1);
 221             }
 222             if (*str == ',')
 223               str++;
 224           } while (*str != 0);
 225           insertOpcode (opcode, mnemonic, format, min_cpu, mode_bits);
 226         }
 227       else
 228         fprintf (stderr, "Couldn't scan line %s\n", currentLine);
 229     }
 230
 231   dumpTable ();
 232   return 0;
 233 }