opcodes/s390-mkopc.c

   1 /* s390-mkopc.c -- Generates opcode table out of s390-opc.txt
   2    Copyright 2000, 2001 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., 59 Temple Place - Suite 330, Boston, MA
  20    02111-1307, 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   };
  39
  40 struct op_struct
  41   {
  42     char  opcode[16];
  43     char  mnemonic[16];
  44     char  format[16];
  45     int   mode_bits;
  46     int   min_cpu;
  47
  48     unsigned long long sort_value;
  49     int   no_nibbles;
  50   };
  51
  52 struct op_struct *op_array;
  53 int max_ops;
  54 int no_ops;
  55
  56 static void
  57 createTable (void)
  58 {
  59   max_ops = 256;
  60   op_array = malloc (max_ops * sizeof (struct op_struct));
  61   no_ops = 0;
  62 }
  63
  64 /* `insertOpcode': insert an op_struct into sorted opcode array.  */
  65
  66 static void
  67 insertOpcode (char *opcode, char *mnemonic, char *format,
  68               int min_cpu, int mode_bits)
  69 {
  70   char *str;
  71   unsigned long long sort_value;
  72   int no_nibbles;
  73   int ix, k;
  74
  75   while (no_ops >= max_ops)
  76     {
  77       max_ops = max_ops * 2;
  78       op_array = realloc (op_array, max_ops * sizeof (struct op_struct));
  79     }
  80
  81   sort_value = 0;
  82   str = opcode;
  83   for (ix = 0; ix < 16; ix++)
  84     {
  85       if (*str >= '0' && *str <= '9')
  86         sort_value = (sort_value << 4) + (*str - '0');
  87       else if (*str >= 'a' && *str <= 'f')
  88         sort_value = (sort_value << 4) + (*str - 'a' + 10);
  89       else if (*str >= 'A' && *str <= 'F')
  90         sort_value = (sort_value << 4) + (*str - 'A' + 10);
  91       else if (*str == '?')
  92         sort_value <<= 4;
  93       else
  94         break;
  95       str ++;
  96     }
  97   sort_value <<= 4*(16 - ix);
  98   sort_value += (min_cpu << 8) + mode_bits;
  99   no_nibbles = ix;
 100   for (ix = 0; ix < no_ops; ix++)
 101     if (sort_value > op_array[ix].sort_value)
 102       break;
 103   for (k = no_ops; k > ix; k--)
 104     op_array[k] = op_array[k-1];
 105   strcpy(op_array[ix].opcode, opcode);
 106   strcpy(op_array[ix].mnemonic, mnemonic);
 107   strcpy(op_array[ix].format, format);
 108   op_array[ix].sort_value = sort_value;
 109   op_array[ix].no_nibbles = no_nibbles;
 110   op_array[ix].min_cpu = min_cpu;
 111   op_array[ix].mode_bits = mode_bits;
 112   no_ops++;
 113 }
 114
 115 static char file_header[] =
 116   "/* The opcode table. This file was generated by s390-mkopc.\n\n"
 117   "   The format of the opcode table is:\n\n"
 118   "   NAME           OPCODE     MASK    OPERANDS\n\n"
 119   "   Name is the name of the instruction.\n"
 120   "   OPCODE is the instruction opcode.\n"
 121   "   MASK is the opcode mask; this is used to tell the disassembler\n"
 122   "     which bits in the actual opcode must match OPCODE.\n"
 123   "   OPERANDS is the list of operands.\n\n"
 124   "   The disassembler reads the table in order and prints the first\n"
 125   "   instruction which matches.  */\n\n"
 126   "const struct s390_opcode s390_opcodes[] =\n  {\n";
 127
 128 /* `dumpTable': write opcode table.  */
 129
 130 static void
 131 dumpTable (void)
 132 {
 133   char *str;
 134   int  ix;
 135
 136   /*  Write hash table entries (slots).  */
 137   printf (file_header);
 138
 139   for (ix = 0; ix < no_ops; ix++)
 140     {
 141       printf ("  { \"%s\", ", op_array[ix].mnemonic);
 142       for (str = op_array[ix].opcode; *str != 0; str++)
 143         if (*str == '?')
 144           *str = '0';
 145       printf ("OP%i(0x%sLL), ",
 146               op_array[ix].no_nibbles*4, op_array[ix].opcode);
 147       printf ("MASK_%s, INSTR_%s, ",
 148               op_array[ix].format, op_array[ix].format);
 149       printf ("%i, ", op_array[ix].mode_bits);
 150       printf ("%i}", op_array[ix].min_cpu);
 151       if (ix < no_ops-1)
 152         printf (",\n");
 153       else
 154         printf ("\n");
 155     }
 156   printf ("};\n\n");
 157   printf ("const int s390_num_opcodes =\n");
 158   printf ("  sizeof (s390_opcodes) / sizeof (s390_opcodes[0]);\n\n");
 159 }
 160
 161 int
 162 main (void)
 163 {
 164   char currentLine[256];
 165
 166   createTable ();
 167
 168   /*  Read opcode descriptions from `stdin'.  For each mnemonic,
 169       make an entry into the opcode table.  */
 170   while (fgets (currentLine, sizeof (currentLine), stdin) != NULL)
 171     {
 172       char  opcode[16];
 173       char  mnemonic[16];
 174       char  format[16];
 175       char  description[64];
 176       char  cpu_string[16];
 177       char  modes_string[16];
 178       int   min_cpu;
 179       int   mode_bits;
 180       char  *str;
 181
 182       if (currentLine[0] == '#')
 183         continue;
 184       memset (opcode, 0, 8);
 185       if (sscanf (currentLine, "%15s %15s %15s \"%[^\"]\" %15s %15s",
 186                   opcode, mnemonic, format, description,
 187                   cpu_string, modes_string) == 6)
 188         {
 189           if (strcmp (cpu_string, "g5") == 0)
 190             min_cpu = S390_OPCODE_G5;
 191           else if (strcmp (cpu_string, "g6") == 0)
 192             min_cpu = S390_OPCODE_G6;
 193           else if (strcmp (cpu_string, "z900") == 0)
 194             min_cpu = S390_OPCODE_Z900;
 195           else {
 196             fprintf (stderr, "Couldn't parse cpu string %s\n", cpu_string);
 197             exit (1);
 198           }
 199
 200           str = modes_string;
 201           mode_bits = 0;
 202           do {
 203             if (strncmp (str, "esa", 3) == 0
 204                 && (str[3] == 0 || str[3] == ',')) {
 205               mode_bits |= 1 << S390_OPCODE_ESA;
 206               str += 3;
 207             } else if (strncmp (str, "zarch", 5) == 0
 208                        && (str[5] == 0 || str[5] == ',')) {
 209               mode_bits |= 1 << S390_OPCODE_ZARCH;
 210               str += 5;
 211             } else {
 212               fprintf (stderr, "Couldn't parse modes string %s\n",
 213                        modes_string);
 214               exit (1);
 215             }
 216             if (*str == ',')
 217               str++;
 218           } while (*str != 0);
 219           insertOpcode (opcode, mnemonic, format, min_cpu, mode_bits);
 220         }
 221       else
 222         fprintf (stderr, "Couldn't scan line %s\n", currentLine);
 223     }
 224
 225   dumpTable ();
 226   return 0;
 227 }