/* s390-mkopc.c -- Generates opcode table out of s390-opc.txt
Copyright 2000, 2001 Free Software Foundation, Inc.
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
This file is part of GDB, GAS, and the GNU binutils.
This program 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 2 of the License, or
(at your option) any later version.
This program 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 program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* ARCHBITS_ESA and ARCH_ESAME correspond to the bit numbers defined
by s390_opcode_arch_val in include/opcode/s390.h:
ARCHBITS_ESAONLY = (1<<S390_OPCODE_ESA)
ARCHBITS_ESA = (1<<S390_OPCODE_ESA) + (1<<S390_OPCODE_ESAME)
ARCHBITS_ESA = (1<<S390_OPCODE_ESAME). */
#define ARCHBITS_ESAONLY 1
#define ARCHBITS_ESA 3
#define ARCHBITS_ESAME 2
struct op_struct
{
char opcode[16];
char mnemonic[16];
char format[16];
int archbits;
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 archbits)
{
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);
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].archbits = archbits;
no_ops++;
}
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].archbits);
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 archtag[16];
int archbits;
if (currentLine[0] == '#')
continue;
memset (opcode, 0, 8);
if (sscanf (currentLine, "%15s %15s %15s \"%[^\"]\" %15s",
opcode, mnemonic, format, description, archtag) == 5)
{
if (strcmp (archtag, "esaonly") == 0)
archbits = ARCHBITS_ESAONLY;
else if (strcmp (archtag, "esa") == 0)
archbits = ARCHBITS_ESA;
else if (strcmp (archtag, "esame") == 0)
archbits = ARCHBITS_ESAME;
else
archbits = 0;
insertOpcode (opcode, mnemonic, format, archbits);
}
else
fprintf (stderr, "Couldn't scan line %s\n", currentLine);
}
dumpTable ();
return 0;
}
