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 */
27enum s390_opcode_mode_val
28  {
29    S390_OPCODE_ESA = 0,
30    S390_OPCODE_ZARCH
31  };
32
33enum 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
42struct 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
54struct op_struct *op_array;
55int max_ops;
56int no_ops;
57
58static void
59createTable (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
68static void
69insertOpcode (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
117static 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
132static void
133dumpTable (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
163int
164main (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}
234