/* s390-mkopc.c -- Generates opcode table out of s390-opc.txt
Copyright (C) 2000-2018 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>
#include "opcode/s390.h"
struct op_struct
{
char opcode[16];
char mnemonic[16];
char format[16];
int mode_bits;
int min_cpu;
int flags;
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, int flags)
{
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;
op_array[ix].flags = flags;
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 '$' tag. */
#define NUM_CRB_EXTENSIONS 12
const struct s390_cond_ext_format s390_crb_extensions[NUM_CRB_EXTENSIONS] =
{ { '2', "h" }, /* jump on A high */
{ '2', "nle" }, /* jump on not low or equal */
{ '4', "l" }, /* jump on A low */
{ '4', "nhe" }, /* jump on not high or equal */
{ '6', "ne" }, /* jump on A not equal B */
{ '6', "lh" }, /* jump on low or high */
{ '8', "e" }, /* jump on A equal B */
{ '8', "nlh" }, /* jump on not low or high */
{ 'a', "nl" }, /* jump on A not low */
{ 'a', "he" }, /* jump on high or equal */
{ 'c', "nh" }, /* jump on A not high */
{ 'c', "le" }, /* jump on low or equal */
};
/* As with insertOpcode instructions are added to the sorted opcode
array. Additionally mnemonics containing the '*<number>' tag are
expanded to the set of conditional instructions described by
s390_cond_extensions with the tag replaced by the respective
mnemonic extensions. */
static void
insertExpandedMnemonic (char *opcode, char *mnemonic, char *format,
int min_cpu, int mode_bits, int flags)
{
char *tag;
char prefix[15];
char suffix[15];
char number[15];
int mask_start, i = 0, tag_found = 0, reading_number = 0;
int number_p = 0, suffix_p = 0, prefix_p = 0;
const struct s390_cond_ext_format *ext_table;
int ext_table_length;
if (!(tag = strpbrk (mnemonic, "*$")))
{
insertOpcode (opcode, mnemonic, format, min_cpu, mode_bits, flags);
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, flags);
}
return;
malformed_mnemonic:
fprintf (stderr, "Malformed mnemonic: %s\n", mnemonic);
}
static const 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"
" MODE_BITS - zarch or esa\n"
" MIN_CPU - number of the min cpu level required\n"
" FLAGS - instruction flags. */\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 ("%s", 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);
printf ("%i}", op_array[ix].flags);
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[80];
char cpu_string[16];
char modes_string[16];
char flags_string[80];
int min_cpu;
int mode_bits;
int flag_bits;
int num_matched;
char *str;
if (currentLine[0] == '#' || currentLine[0] == '\n')
continue;
memset (opcode, 0, 8);
num_matched =
sscanf (currentLine, "%15s %15s %15s \"%79[^\"]\" %15s %15s %79[^\n]",
opcode, mnemonic, format, description,
cpu_string, modes_string, flags_string);
if (num_matched != 6 && num_matched != 7)
{
fprintf (stderr, "Couldn't scan line %s\n", currentLine);
exit (1);
}
if (strcmp (cpu_string, "g5") == 0
|| strcmp (cpu_string, "arch3") == 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
|| strcmp (cpu_string, "arch5") == 0)
min_cpu = S390_OPCODE_Z900;
else if (strcmp (cpu_string, "z990") == 0
|| strcmp (cpu_string, "arch6") == 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
|| strcmp (cpu_string, "arch7") == 0)
min_cpu = S390_OPCODE_Z9_EC;
else if (strcmp (cpu_string, "z10") == 0
|| strcmp (cpu_string, "arch8") == 0)
min_cpu = S390_OPCODE_Z10;
else if (strcmp (cpu_string, "z196") == 0
|| strcmp (cpu_string, "arch9") == 0)
min_cpu = S390_OPCODE_Z196;
else if (strcmp (cpu_string, "zEC12") == 0
|| strcmp (cpu_string, "arch10") == 0)
min_cpu = S390_OPCODE_ZEC12;
else if (strcmp (cpu_string, "z13") == 0
|| strcmp (cpu_string, "arch11") == 0)
min_cpu = S390_OPCODE_Z13;
else if (strcmp (cpu_string, "z14") == 0
|| strcmp (cpu_string, "arch12") == 0)
min_cpu = S390_OPCODE_ARCH12;
else if (strcmp (cpu_string, "arch13") == 0)
min_cpu = S390_OPCODE_ARCH13;
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);
flag_bits = 0;
if (num_matched == 7)
{
str = flags_string;
do {
if (strncmp (str, "optparm", 7) == 0
&& (str[7] == 0 || str[7] == ',')) {
flag_bits |= S390_INSTR_FLAG_OPTPARM;
str += 7;
} else if (strncmp (str, "optparm2", 8) == 0
&& (str[8] == 0 || str[8] == ',')) {
flag_bits |= S390_INSTR_FLAG_OPTPARM2;
str += 8;
} else if (strncmp (str, "htm", 3) == 0
&& (str[3] == 0 || str[3] == ',')) {
flag_bits |= S390_INSTR_FLAG_HTM;
str += 3;
} else if (strncmp (str, "vx", 2) == 0
&& (str[2] == 0 || str[2] == ',')) {
flag_bits |= S390_INSTR_FLAG_VX;
str += 2;
} else {
fprintf (stderr, "Couldn't parse flags string %s\n",
flags_string);
exit (1);
}
if (*str == ',')
str++;
} while (*str != 0);
}
insertExpandedMnemonic (opcode, mnemonic, format, min_cpu, mode_bits, flag_bits);
}
dumpTable ();
return 0;
}