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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [opcodes/] [s390-mkopc.c] - Rev 321
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/* s390-mkopc.c -- Generates opcode table out of s390-opc.txt Copyright 2000, 2001, 2003, 2005, 2007, 2008 Free Software Foundation, Inc. Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). This file is part of the GNU opcodes library. This library is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. It is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this file; see the file COPYING. If not, write to the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #include <stdio.h> #include <stdlib.h> #include <string.h> /* Taken from opcodes/s390.h */ enum s390_opcode_mode_val { S390_OPCODE_ESA = 0, S390_OPCODE_ZARCH }; enum s390_opcode_cpu_val { S390_OPCODE_G5 = 0, S390_OPCODE_G6, S390_OPCODE_Z900, S390_OPCODE_Z990, S390_OPCODE_Z9_109, S390_OPCODE_Z9_EC, S390_OPCODE_Z10 }; struct op_struct { char opcode[16]; char mnemonic[16]; char format[16]; int mode_bits; int min_cpu; unsigned long long sort_value; int no_nibbles; }; struct op_struct *op_array; int max_ops; int no_ops; static void createTable (void) { max_ops = 256; op_array = malloc (max_ops * sizeof (struct op_struct)); no_ops = 0; } /* `insertOpcode': insert an op_struct into sorted opcode array. */ static void insertOpcode (char *opcode, char *mnemonic, char *format, int min_cpu, int mode_bits) { char *str; unsigned long long sort_value; int no_nibbles; int ix, k; while (no_ops >= max_ops) { max_ops = max_ops * 2; op_array = realloc (op_array, max_ops * sizeof (struct op_struct)); } sort_value = 0; str = opcode; for (ix = 0; ix < 16; ix++) { if (*str >= '0' && *str <= '9') sort_value = (sort_value << 4) + (*str - '0'); else if (*str >= 'a' && *str <= 'f') sort_value = (sort_value << 4) + (*str - 'a' + 10); else if (*str >= 'A' && *str <= 'F') sort_value = (sort_value << 4) + (*str - 'A' + 10); else if (*str == '?') sort_value <<= 4; else break; str ++; } sort_value <<= 4*(16 - ix); sort_value += (min_cpu << 8) + mode_bits; no_nibbles = ix; for (ix = 0; ix < no_ops; ix++) if (sort_value > op_array[ix].sort_value) break; for (k = no_ops; k > ix; k--) op_array[k] = op_array[k-1]; strcpy(op_array[ix].opcode, opcode); strcpy(op_array[ix].mnemonic, mnemonic); strcpy(op_array[ix].format, format); op_array[ix].sort_value = sort_value; op_array[ix].no_nibbles = no_nibbles; op_array[ix].min_cpu = min_cpu; op_array[ix].mode_bits = mode_bits; no_ops++; } struct s390_cond_ext_format { char nibble; char extension[4]; }; /* The mnemonic extensions for conditional jumps used to replace the '*' tag. */ #define NUM_COND_EXTENSIONS 20 const struct s390_cond_ext_format s390_cond_extensions[NUM_COND_EXTENSIONS] = { { '1', "o" }, /* jump on overflow / if ones */ { '2', "h" }, /* jump on A high */ { '2', "p" }, /* jump on plus */ { '3', "nle" }, /* jump on not low or equal */ { '4', "l" }, /* jump on A low */ { '4', "m" }, /* jump on minus / if mixed */ { '5', "nhe" }, /* jump on not high or equal */ { '6', "lh" }, /* jump on low or high */ { '7', "ne" }, /* jump on A not equal B */ { '7', "nz" }, /* jump on not zero / if not zeros */ { '8', "e" }, /* jump on A equal B */ { '8', "z" }, /* jump on zero / if zeros */ { '9', "nlh" }, /* jump on not low or high */ { 'a', "he" }, /* jump on high or equal */ { 'b', "nl" }, /* jump on A not low */ { 'b', "nm" }, /* jump on not minus / if not mixed */ { 'c', "le" }, /* jump on low or equal */ { 'd', "nh" }, /* jump on A not high */ { 'd', "np" }, /* jump on not plus */ { 'e', "no" }, /* jump on not overflow / if not ones */ }; /* The mnemonic extensions for conditional branches used to replace the '$' tag. */ #define NUM_CRB_EXTENSIONS 12 const struct s390_cond_ext_format s390_crb_extensions[NUM_CRB_EXTENSIONS] = { { '2', "h" }, /* jump on A high */ { '2', "nle" }, /* jump on not low or equal */ { '4', "l" }, /* jump on A low */ { '4', "nhe" }, /* jump on not high or equal */ { '6', "ne" }, /* jump on A not equal B */ { '6', "lh" }, /* jump on low or high */ { '8', "e" }, /* jump on A equal B */ { '8', "nlh" }, /* jump on not low or high */ { 'a', "nl" }, /* jump on A not low */ { 'a', "he" }, /* jump on high or equal */ { 'c', "nh" }, /* jump on A not high */ { 'c', "le" }, /* jump on low or equal */ }; /* As with insertOpcode instructions are added to the sorted opcode array. Additionally mnemonics containing the '*<number>' tag are expanded to the set of conditional instructions described by s390_cond_extensions with the tag replaced by the respective mnemonic extensions. */ static void insertExpandedMnemonic (char *opcode, char *mnemonic, char *format, int min_cpu, int mode_bits) { char *tag; char prefix[15]; char suffix[15]; char number[15]; int mask_start, i = 0, tag_found = 0, reading_number = 0; int number_p = 0, suffix_p = 0, prefix_p = 0; const struct s390_cond_ext_format *ext_table; int ext_table_length; if (!(tag = strpbrk (mnemonic, "*$"))) { insertOpcode (opcode, mnemonic, format, min_cpu, mode_bits); return; } while (mnemonic[i] != '\0') { if (mnemonic[i] == *tag) { if (tag_found) goto malformed_mnemonic; tag_found = 1; reading_number = 1; } else switch (mnemonic[i]) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if (!tag_found || !reading_number) goto malformed_mnemonic; number[number_p++] = mnemonic[i]; break; default: if (reading_number) { if (!number_p) goto malformed_mnemonic; else reading_number = 0; } if (tag_found) suffix[suffix_p++] = mnemonic[i]; else prefix[prefix_p++] = mnemonic[i]; } i++; } prefix[prefix_p] = '\0'; suffix[suffix_p] = '\0'; number[number_p] = '\0'; if (sscanf (number, "%d", &mask_start) != 1) goto malformed_mnemonic; if (mask_start & 3) { fprintf (stderr, "Conditional mask not at nibble boundary in: %s\n", mnemonic); return; } mask_start >>= 2; switch (*tag) { case '*': ext_table = s390_cond_extensions; ext_table_length = NUM_COND_EXTENSIONS; break; case '$': ext_table = s390_crb_extensions; ext_table_length = NUM_CRB_EXTENSIONS; break; default: fprintf (stderr, "Unknown tag char: %c\n", *tag); } for (i = 0; i < ext_table_length; i++) { char new_mnemonic[15]; strcpy (new_mnemonic, prefix); opcode[mask_start] = ext_table[i].nibble; strcat (new_mnemonic, ext_table[i].extension); strcat (new_mnemonic, suffix); insertOpcode (opcode, new_mnemonic, format, min_cpu, mode_bits); } return; malformed_mnemonic: fprintf (stderr, "Malformed mnemonic: %s\n", mnemonic); } static char file_header[] = "/* The opcode table. This file was generated by s390-mkopc.\n\n" " The format of the opcode table is:\n\n" " NAME OPCODE MASK OPERANDS\n\n" " Name is the name of the instruction.\n" " OPCODE is the instruction opcode.\n" " MASK is the opcode mask; this is used to tell the disassembler\n" " which bits in the actual opcode must match OPCODE.\n" " OPERANDS is the list of operands.\n\n" " The disassembler reads the table in order and prints the first\n" " instruction which matches. */\n\n" "const struct s390_opcode s390_opcodes[] =\n {\n"; /* `dumpTable': write opcode table. */ static void dumpTable (void) { char *str; int ix; /* Write hash table entries (slots). */ printf (file_header); for (ix = 0; ix < no_ops; ix++) { printf (" { \"%s\", ", op_array[ix].mnemonic); for (str = op_array[ix].opcode; *str != 0; str++) if (*str == '?') *str = '0'; printf ("OP%i(0x%sLL), ", op_array[ix].no_nibbles*4, op_array[ix].opcode); printf ("MASK_%s, INSTR_%s, ", op_array[ix].format, op_array[ix].format); printf ("%i, ", op_array[ix].mode_bits); printf ("%i}", op_array[ix].min_cpu); if (ix < no_ops-1) printf (",\n"); else printf ("\n"); } printf ("};\n\n"); printf ("const int s390_num_opcodes =\n"); printf (" sizeof (s390_opcodes) / sizeof (s390_opcodes[0]);\n\n"); } int main (void) { char currentLine[256]; createTable (); /* Read opcode descriptions from `stdin'. For each mnemonic, make an entry into the opcode table. */ while (fgets (currentLine, sizeof (currentLine), stdin) != NULL) { char opcode[16]; char mnemonic[16]; char format[16]; char description[64]; char cpu_string[16]; char modes_string[16]; int min_cpu; int mode_bits; char *str; if (currentLine[0] == '#') continue; memset (opcode, 0, 8); if (sscanf (currentLine, "%15s %15s %15s \"%[^\"]\" %15s %15s", opcode, mnemonic, format, description, cpu_string, modes_string) == 6) { if (strcmp (cpu_string, "g5") == 0) min_cpu = S390_OPCODE_G5; else if (strcmp (cpu_string, "g6") == 0) min_cpu = S390_OPCODE_G6; else if (strcmp (cpu_string, "z900") == 0) min_cpu = S390_OPCODE_Z900; else if (strcmp (cpu_string, "z990") == 0) min_cpu = S390_OPCODE_Z990; else if (strcmp (cpu_string, "z9-109") == 0) min_cpu = S390_OPCODE_Z9_109; else if (strcmp (cpu_string, "z9-ec") == 0) min_cpu = S390_OPCODE_Z9_EC; else if (strcmp (cpu_string, "z10") == 0) min_cpu = S390_OPCODE_Z10; else { fprintf (stderr, "Couldn't parse cpu string %s\n", cpu_string); exit (1); } str = modes_string; mode_bits = 0; do { if (strncmp (str, "esa", 3) == 0 && (str[3] == 0 || str[3] == ',')) { mode_bits |= 1 << S390_OPCODE_ESA; str += 3; } else if (strncmp (str, "zarch", 5) == 0 && (str[5] == 0 || str[5] == ',')) { mode_bits |= 1 << S390_OPCODE_ZARCH; str += 5; } else { fprintf (stderr, "Couldn't parse modes string %s\n", modes_string); exit (1); } if (*str == ',') str++; } while (*str != 0); insertExpandedMnemonic (opcode, mnemonic, format, min_cpu, mode_bits); } else fprintf (stderr, "Couldn't scan line %s\n", currentLine); } dumpTable (); return 0; }
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