| 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 | /* ARCHBITS_ESA and ARCH_ESAME correspond to the bit numbers defined |
| 27 | by s390_opcode_arch_val in include/opcode/s390.h: |
| 28 | ARCHBITS_ESAONLY = (1<<S390_OPCODE_ESA) |
| 29 | ARCHBITS_ESA = (1<<S390_OPCODE_ESA) + (1<<S390_OPCODE_ESAME) |
| 30 | ARCHBITS_ESA = (1<<S390_OPCODE_ESAME). */ |
| 31 | #define ARCHBITS_ESAONLY 1 |
| 32 | #define ARCHBITS_ESA 3 |
| 33 | #define ARCHBITS_ESAME 2 |
| 34 | |
| 35 | struct op_struct |
| 36 | { |
| 37 | char opcode[16]; |
| 38 | char mnemonic[16]; |
| 39 | char format[16]; |
| 40 | int archbits; |
| 41 | unsigned long long sort_value; |
| 42 | int no_nibbles; |
| 43 | }; |
| 44 | |
| 45 | struct op_struct *op_array; |
| 46 | int max_ops; |
| 47 | int no_ops; |
| 48 | |
| 49 | static void |
| 50 | createTable (void) |
| 51 | { |
| 52 | max_ops = 256; |
| 53 | op_array = malloc (max_ops * sizeof (struct op_struct)); |
| 54 | no_ops = 0; |
| 55 | } |
| 56 | |
| 57 | /* `insertOpcode': insert an op_struct into sorted opcode array. */ |
| 58 | |
| 59 | static void |
| 60 | insertOpcode (char *opcode, char *mnemonic, char *format, int archbits) |
| 61 | { |
| 62 | char *str; |
| 63 | unsigned long long sort_value; |
| 64 | int no_nibbles; |
| 65 | int ix, k; |
| 66 | |
| 67 | while (no_ops >= max_ops) |
| 68 | { |
| 69 | max_ops = max_ops * 2; |
| 70 | op_array = realloc (op_array, max_ops * sizeof (struct op_struct)); |
| 71 | } |
| 72 | |
| 73 | sort_value = 0; |
| 74 | str = opcode; |
| 75 | for (ix = 0; ix < 16; ix++) |
| 76 | { |
| 77 | if (*str >= '0' && *str <= '9') |
| 78 | sort_value = (sort_value << 4) + (*str - '0'); |
| 79 | else if (*str >= 'a' && *str <= 'f') |
| 80 | sort_value = (sort_value << 4) + (*str - 'a' + 10); |
| 81 | else if (*str >= 'A' && *str <= 'F') |
| 82 | sort_value = (sort_value << 4) + (*str - 'A' + 10); |
| 83 | else if (*str == '?') |
| 84 | sort_value <<= 4; |
| 85 | else |
| 86 | break; |
| 87 | str ++; |
| 88 | } |
| 89 | sort_value <<= 4*(16 - ix); |
| 90 | no_nibbles = ix; |
| 91 | for (ix = 0; ix < no_ops; ix++) |
| 92 | if (sort_value > op_array[ix].sort_value) |
| 93 | break; |
| 94 | for (k = no_ops; k > ix; k--) |
| 95 | op_array[k] = op_array[k-1]; |
| 96 | strcpy(op_array[ix].opcode, opcode); |
| 97 | strcpy(op_array[ix].mnemonic, mnemonic); |
| 98 | strcpy(op_array[ix].format, format); |
| 99 | op_array[ix].sort_value = sort_value; |
| 100 | op_array[ix].no_nibbles = no_nibbles; |
| 101 | op_array[ix].archbits = archbits; |
| 102 | no_ops++; |
| 103 | } |
| 104 | |
| 105 | static char file_header[] = |
| 106 | "/* The opcode table. This file was generated by s390-mkopc.\n\n" |
| 107 | " The format of the opcode table is:\n\n" |
| 108 | " NAME OPCODE MASK OPERANDS\n\n" |
| 109 | " Name is the name of the instruction.\n" |
| 110 | " OPCODE is the instruction opcode.\n" |
| 111 | " MASK is the opcode mask; this is used to tell the disassembler\n" |
| 112 | " which bits in the actual opcode must match OPCODE.\n" |
| 113 | " OPERANDS is the list of operands.\n\n" |
| 114 | " The disassembler reads the table in order and prints the first\n" |
| 115 | " instruction which matches. */\n\n" |
| 116 | "const struct s390_opcode s390_opcodes[] =\n {\n"; |
| 117 | |
| 118 | /* `dumpTable': write opcode table. */ |
| 119 | |
| 120 | static void |
| 121 | dumpTable (void) |
| 122 | { |
| 123 | char *str; |
| 124 | int ix; |
| 125 | |
| 126 | /* Write hash table entries (slots). */ |
| 127 | printf (file_header); |
| 128 | |
| 129 | for (ix = 0; ix < no_ops; ix++) |
| 130 | { |
| 131 | printf (" { \"%s\", ", op_array[ix].mnemonic); |
| 132 | for (str = op_array[ix].opcode; *str != 0; str++) |
| 133 | if (*str == '?') |
| 134 | *str = '0'; |
| 135 | printf ("OP%i(0x%sLL), ", |
| 136 | op_array[ix].no_nibbles*4, op_array[ix].opcode); |
| 137 | printf ("MASK_%s, INSTR_%s, ", |
| 138 | op_array[ix].format, op_array[ix].format); |
| 139 | printf ("%i}", op_array[ix].archbits); |
| 140 | if (ix < no_ops-1) |
| 141 | printf (",\n"); |
| 142 | else |
| 143 | printf ("\n"); |
| 144 | } |
| 145 | printf ("};\n\n"); |
| 146 | printf ("const int s390_num_opcodes =\n"); |
| 147 | printf (" sizeof (s390_opcodes) / sizeof (s390_opcodes[0]);\n\n"); |
| 148 | } |
| 149 | |
| 150 | int |
| 151 | main (void) |
| 152 | { |
| 153 | char currentLine[256]; |
| 154 | |
| 155 | createTable (); |
| 156 | |
| 157 | /* Read opcode descriptions from `stdin'. For each mnemonic, |
| 158 | make an entry into the opcode table. */ |
| 159 | while (fgets (currentLine, sizeof (currentLine), stdin) != NULL) |
| 160 | { |
| 161 | char opcode[16]; |
| 162 | char mnemonic[16]; |
| 163 | char format[16]; |
| 164 | char description[64]; |
| 165 | char archtag[16]; |
| 166 | int archbits; |
| 167 | |
| 168 | if (currentLine[0] == '#') |
| 169 | continue; |
| 170 | memset (opcode, 0, 8); |
| 171 | if (sscanf (currentLine, "%15s %15s %15s \"%[^\"]\" %15s", |
| 172 | opcode, mnemonic, format, description, archtag) == 5) |
| 173 | { |
| 174 | if (strcmp (archtag, "esaonly") == 0) |
| 175 | archbits = ARCHBITS_ESAONLY; |
| 176 | else if (strcmp (archtag, "esa") == 0) |
| 177 | archbits = ARCHBITS_ESA; |
| 178 | else if (strcmp (archtag, "esame") == 0) |
| 179 | archbits = ARCHBITS_ESAME; |
| 180 | else |
| 181 | archbits = 0; |
| 182 | insertOpcode (opcode, mnemonic, format, archbits); |
| 183 | } |
| 184 | else |
| 185 | fprintf (stderr, "Couldn't scan line %s\n", currentLine); |
| 186 | } |
| 187 | |
| 188 | dumpTable (); |
| 189 | return 0; |
| 190 | } |