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73fa0d3fb2
(z8k_inv_list): Delete global. (DIRTY_HACK): Delete macro. (makelist): Delete global. (main): Delete code making a list. Delete dirty hack code. Use lookup_inst instead of z8k_inv_list. * list.c: Delete file. * Makefile.in (writecode): Do not link in list.o. (list.o): Delete target.
1949 lines
38 KiB
C
1949 lines
38 KiB
C
/* generate instructions for Z8KSIM
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Copyright 1992, 1993, 2002 Free Software Foundation, Inc.
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This file is part of Z8KSIM
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Z8KSIM is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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Z8KSIM is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Z8KZIM; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This program generates the code which emulates each of the z8k
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instructions
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code goes into three files, tc-gen1.h, tc-gen2.h and tc-gen3.h.
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which file being made depends upon the options
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-1 tc-gen1.h contains the fully expanded code for some selected
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opcodes, (those in the quick.c list)
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-2 tc-gen2.h contains a list of pointers to functions, one for each
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opcode. It points to functions in tc-gen3.h and tc-gen1.h
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depending upon quick.c
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-3 tc-gen3.h contains all the opcodes in unexpanded form.
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-b3 tc-genb3.h same as -3 but for long pointers
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*/
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/* steve chamberlain
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sac@cygnus.com */
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#include "config.h"
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#include <ansidecl.h>
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#include <stdio.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#endif
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#define NICENAMES
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#define DEFINE_TABLE
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#include "../opcodes/z8k-opc.h"
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#define NOPS 500
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struct opcode_value
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{
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int n;
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struct opcode_value *next;
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};
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#define NICENAMES
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int BIG;
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static char *reg_names[] =
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{"bad", "src", "dst", "aux_a", "aux_b", "aux_r", "aux_x"};
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#define IS_DST(x) ((x & 0xf) == 2)
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#define IS_SRC(x) ((x & 0xf)==1)
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#define SIZE_ADDRESS (BIG ? 8 : 4) /* number of nibbles in a ptr*/
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static int file;
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static int nibs = 0;
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static char *current_size;
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static char *current_name;
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static char current_word0[40];
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static char current_byte0[40];
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static char current_byte1[40];
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static int indent;
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static char *p;
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static char *d;
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struct opcode_value *list[NOPS];
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static opcode_entry_type *
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lookup_inst (what)
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int what;
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{
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static short *z8k_inv_list = NULL;
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const nr_z8k_inv_list_elements = 1 << 16;
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if (z8k_inv_list == NULL)
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{
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/* Initialize the list to 0xff == -1 */
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z8k_inv_list = calloc (nr_z8k_inv_list_elements, sizeof (short));
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memset (z8k_inv_list, 0xff, nr_z8k_inv_list_elements * sizeof (short));
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}
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/* Entry empty? Fill it in. */
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if (z8k_inv_list[what] == -1)
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{
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int nibl_index;
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int nibl_matched;
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unsigned short instr_nibl;
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unsigned short tabl_datum, datum_class, datum_value;
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char instr_nibbles[8];
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opcode_entry_type *ptr = z8k_table;
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nibl_matched = 0;
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instr_nibbles[3] = (what >> 0) & 0xf;
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instr_nibbles[2] = (what >> 4) & 0xf;
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instr_nibbles[1] = (what >> 8) & 0xf;
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instr_nibbles[0] = (what >> 12) & 0xf;
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/* Assume it won't be found. */
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z8k_inv_list[what] = -2;
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while (ptr->name)
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{
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nibl_matched = 1;
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for (nibl_index = 0; nibl_index < 4 && nibl_matched; nibl_index++)
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{
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instr_nibl = instr_nibbles[nibl_index];
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tabl_datum = ptr->byte_info[nibl_index];
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datum_class = tabl_datum & CLASS_MASK;
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datum_value = ~CLASS_MASK & tabl_datum;
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switch (datum_class)
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{
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case CLASS_BIT_1OR2:
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if (datum_value != (instr_nibl & ~0x2))
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nibl_matched = 0;
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break;
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case CLASS_IGNORE:
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break;
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case CLASS_BIT:
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if (datum_value != instr_nibl)
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nibl_matched = 0;
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break;
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case CLASS_00II:
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if (!((~instr_nibl) & 0x4))
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nibl_matched = 0;
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break;
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case CLASS_01II:
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if (!(instr_nibl & 0x4))
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nibl_matched = 0;
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break;
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case CLASS_0CCC:
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if (!((~instr_nibl) & 0x8))
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nibl_matched = 0;
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break;
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case CLASS_1CCC:
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if (!(instr_nibl & 0x8))
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nibl_matched = 0;
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break;
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case CLASS_0DISP7:
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if (!((~instr_nibl) & 0x8))
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nibl_matched = 0;
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nibl_index += 1;
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break;
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case CLASS_1DISP7:
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if (!(instr_nibl & 0x8))
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nibl_matched = 0;
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nibl_index += 1;
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break;
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case CLASS_REGN0:
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if (instr_nibl == 0)
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nibl_matched = 0;
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break;
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default:
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break;
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}
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}
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if (nibl_matched)
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{
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z8k_inv_list[what] = ptr->idx;
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break; /* while */
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}
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ptr++;
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}
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}
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if (z8k_inv_list[what] >= 0)
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return z8k_table + z8k_inv_list[what];
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return 0;
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}
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static char *
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insn_4 (n)
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int n;
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{
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switch (n)
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{
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case 1:
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return "((iwords_0>>8) & 0xf)";
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case 2:
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return "((ibytes_1 >> 4) & 0xf)";
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case 3:
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return "((ibytes_1) & 0xf)";
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case 4:
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return "((ibytes_2>>4) & 0xf)";
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case 5:
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return "((ibytes_2) & 0xf)";
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case 6:
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return "((ibytes_3 >> 4) & 0xf)";
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case 7:
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return "((ibytes_3) & 0xf)";
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default:
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return "****";
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}
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}
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char *
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ptr_mode ()
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{
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if (BIG)
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{
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return "ptr_long";
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}
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return "word";
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}
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static
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char *
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ptr_size ()
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{
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if (BIG)
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return "4";
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return "2";
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}
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static char *
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reg_n (x)
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unsigned int x;
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{
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return reg_names[x & 0xf];
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}
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char *
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stack_ptr ()
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{
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return BIG ? "14" : "15";
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}
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char *
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mem ()
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{
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#if 0
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return BIG ? "segmem" : "unsegmem";
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#else
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return "mem";
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#endif
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}
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int
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match (a)
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char *a;
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{
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if (strncmp (p, a, strlen (a)) == 0)
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{
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p += strlen (a);
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return 1;
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}
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return 0;
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}
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static
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void
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sub (y)
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char *y;
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{
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sprintf (d, "%s", y);
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d += strlen (d);
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}
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static char *
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insn_16 (n)
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int n;
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{
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switch (n)
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{
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case 0:
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return "(iwords_0)";
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case 4:
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return "(iwords_1)";
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case 8:
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return "(iwords_2)";
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case 12:
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return "(iwords_3)";
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default:
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return "****";
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}
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}
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static
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char *
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insn_32 (n)
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int n;
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{
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switch (n)
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{
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case 0:
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return "((iwords_0<<16) | (iwords_1))";
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case 4:
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return "((iwords_1<<16) | (iwords_2))";
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case 8:
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return "((iwords_2<<16) | (iwords_3))";
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default:
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return "****";
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}
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}
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static char *
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size_name (x)
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int x;
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{
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switch (x)
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{
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case 8:
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return "byte";
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case 16:
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return "word";
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case 32:
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return "long";
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case 64:
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return "quad";
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}
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return "!!";
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}
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/*VARARGS*/
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void
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emit (string, a1, a2, a3, a4, a5)
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char *string;
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char* a1;
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char* a2;
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char* a3;
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char* a4;
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char* a5;
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{
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int indent_inc = 0;
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int indent_dec = 0;
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int i;
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char buffer[1000];
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d = buffer;
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p = string;
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while (*p)
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{
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if (match ("<fop>"))
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{
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if (BIG)
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{
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sub ("bfop");
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}
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else
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{
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sub ("sfop");
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}
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}
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else if (match ("<iptr>"))
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{
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if (BIG)
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{
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switch (nibs)
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{
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case 4:
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sub ("(((iwords_1 << 8) | (iwords_2)) & 0x7fffff)");
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break;
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default:
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sub ("fail(context,124)");
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break;
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}
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}
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else
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{
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switch (nibs)
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{
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case 4:
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sub ("iwords_1");
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break;
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default:
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sub ("fail(context,123)");
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break;
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}
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}
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}
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else if (match ("<name>"))
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{
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sub (current_name);
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}
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else if (match ("<size>"))
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{
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sub (current_size);
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}
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else if (match ("<insn_4>"))
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{
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sub (insn_4 (nibs));
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}
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else if (match ("<insn_16>"))
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{
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sub (insn_16 (nibs));
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}
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else if (match ("<insn_32>"))
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{
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sub (insn_32 (nibs));
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}
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else if (match ("iwords_0"))
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{
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sub (current_word0);
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}
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else if (match ("ibytes_0"))
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{
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sub (current_byte0);
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}
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else if (match ("<ibytes_1>"))
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{
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sub (current_byte1);
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}
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else if (match ("<next_size>"))
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{
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if (strcmp (current_size, "word") == 0)
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sub ("long");
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if (strcmp (current_size, "byte") == 0)
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sub ("word");
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else if (strcmp (current_size, "long") == 0)
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sub ("quad");
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else
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abort ();
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}
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else if (match ("<addr_type>"))
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{
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if (BIG)
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sub ("unsigned long");
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else
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sub ("unsigned short");
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}
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else if (match ("<c_size>"))
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{
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if (strcmp (current_size, "word") == 0)
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sub ("short");
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else if (strcmp (current_size, "byte") == 0)
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sub ("char");
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else if (strcmp (current_size, "long") == 0)
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sub ("long");
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else
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abort ();
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}
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else if (match ("<pc>"))
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{
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sub ("pc");
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}
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else if (match ("<mem>"))
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{
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sub (mem ());
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}
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else if (match ("<sp>"))
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{
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sub (stack_ptr ());
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}
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else if (match ("<ptr_size>"))
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{
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sub (ptr_size ());
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}
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else if (match ("<ptr_mode>"))
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{
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sub (ptr_mode ());
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}
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else if (match ("<insn_8>"))
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{
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switch (nibs)
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{
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case 2:
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sub ("(iwords_0&0xff)");
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break;
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case 4:
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sub ("(iwords_1>>8)");
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break;
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case 6:
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sub ("(iwords_1&0xff)");
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break;
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case 8:
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sub ("(iwords_2>>8)");
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break;
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case 12:
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sub ("(/* WHO */iwords_3&0xff)");
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break;
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default:
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abort ();
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}
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}
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else
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{
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if (*p == '{')
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indent_inc++;
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if (*p == '}')
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indent_dec++;
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*d++ = *p;
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p++;
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}
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}
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*d++ = 0;
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indent -= indent_dec;
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for (i = 0; i < indent; i++)
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printf ("\t");
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indent += indent_inc;
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printf (buffer, a1, a2, a3, a4, a5);
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}
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/* fetch the lvalues of the operands */
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void
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info_args (p)
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opcode_entry_type *p;
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{
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unsigned int *s;
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int done_one_imm8 = 0;
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/* int done_read = 4;*/
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s = p->byte_info;
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nibs = 0;
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while (*s)
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{
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switch (*s & CLASS_MASK)
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{
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case CLASS_BIT_1OR2:
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emit ("register unsigned int imm_src=(<insn_4>& 2)?2:1;\n");
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break;
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case CLASS_IGNORE:
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case CLASS_BIT:
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/* Just ignore these, we've already decoded this bit */
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nibs++;
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break;
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case CLASS_REGN0:
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case CLASS_REG:
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/* this nibble tells us which register to use as an arg,
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if we've already gobbled the nibble we know what to use */
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{
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int regname = *s & 0xf;
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emit ("register unsigned int reg_%s=<insn_4>;\n",
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reg_names[regname]);
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nibs++;
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}
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break;
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case CLASS_ADDRESS:
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emit ("register unsigned base_%s=<iptr>;\n", reg_n (*s));
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nibs += SIZE_ADDRESS;
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break;
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case CLASS_01II:
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case CLASS_00II:
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emit ("register unsigned int imm_src=<insn_4>&0x2;\n");
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nibs++;
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break;
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case CLASS_FLAGS:
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emit ("register unsigned int imm_src=<insn_4>;\n");
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nibs++;
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break;
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case CLASS_IMM:
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/* Work out the size of the think to fetch */
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{
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switch (*s & ~CLASS_MASK)
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{
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case ARG_IMM16:
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emit ("register unsigned imm_src=<insn_16>;\n");
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nibs += 4;
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break;
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case ARG_IMM32:
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emit ("register unsigned int imm_src= %s;\n", insn_32 (nibs));
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nibs += 8;
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break;
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case ARG_IMM4:
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emit ("register unsigned int imm_src=<insn_4>;\n");
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nibs++;
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break;
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case ARG_NIM4:
|
|
emit ("register unsigned int imm_src = - <insn_4>;\n");
|
|
nibs++;
|
|
break;
|
|
case ARG_IMM2:
|
|
emit ("register unsigned int imm_src=<insn_4> & 0x2;\n");
|
|
nibs++;
|
|
break;
|
|
|
|
case ARG_IMM4M1:
|
|
emit ("register unsigned int imm_src=(<insn_4> + 1);\n");
|
|
nibs++;
|
|
break;
|
|
case ARG_IMM_1:
|
|
emit ("register unsigned int imm_src=1;\n");
|
|
break;
|
|
case ARG_IMM_2:
|
|
emit ("register unsigned int imm_src=2;\n");
|
|
break;
|
|
case ARG_NIM8:
|
|
emit ("register unsigned int imm_src=-<insn_8>;\n");
|
|
nibs += 2;
|
|
break;
|
|
case ARG_IMM8:
|
|
if (!done_one_imm8)
|
|
{
|
|
emit ("register unsigned int imm_src=<insn_8>;\n");
|
|
nibs += 2;
|
|
done_one_imm8 = 1;
|
|
}
|
|
break;
|
|
default:
|
|
emit ("register int fail%d=fail(context,1);\n", nibs);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case CLASS_DISP8:
|
|
/* We can't use `(char)' since char might be unsigned.
|
|
We can't use `(signed char)' because the compiler might be K&R.
|
|
This seems safe, since it only assumes that bytes are 8
|
|
bits. */
|
|
emit ("register unsigned int oplval_dst=((ibytes_1 << (sizeof (int) * 8 - 8)) >> (sizeof (int) * 8 - 9)) + pc;\n");
|
|
#if 0
|
|
/* Original code: fails if characters are unsigned. */
|
|
emit ("register unsigned int oplval_dst=(((char)ibytes_1)<<1) + pc;\n");
|
|
#endif
|
|
nibs += 2;
|
|
break;
|
|
case CLASS_CC:
|
|
emit ("register unsigned int op_cc=<insn_4>;\n");
|
|
nibs++;
|
|
break;
|
|
default:
|
|
emit ("register int FAIL%d=fail(context,2);\n", nibs);
|
|
break;
|
|
}
|
|
;
|
|
/* work out how to fetch the immediate value */
|
|
}
|
|
|
|
s++;
|
|
}
|
|
}
|
|
|
|
void
|
|
info_special (p, getdst, nostore, before, nosrc)
|
|
opcode_entry_type *p;
|
|
int *getdst;
|
|
int *nostore;
|
|
int *before;
|
|
int *nosrc;
|
|
{
|
|
switch (p->opcode)
|
|
{
|
|
case OPC_exts:
|
|
case OPC_extsb:
|
|
case OPC_extsl:
|
|
*nostore = 1;
|
|
*nosrc = 1;
|
|
break;
|
|
case OPC_ldm:
|
|
*nostore = 1;
|
|
*nosrc = 1;
|
|
break;
|
|
case OPC_negb:
|
|
case OPC_neg:
|
|
case OPC_sla:
|
|
case OPC_slab:
|
|
case OPC_slal:
|
|
case OPC_sda:
|
|
case OPC_sdab:
|
|
case OPC_sdal:
|
|
case OPC_com:
|
|
case OPC_comb:
|
|
case OPC_adc:
|
|
case OPC_sbc:
|
|
case OPC_nop:
|
|
case OPC_adcb:
|
|
case OPC_add:
|
|
case OPC_addb:
|
|
case OPC_addl:
|
|
case OPC_inc:
|
|
case OPC_sub:
|
|
case OPC_subb:
|
|
case OPC_subl:
|
|
case OPC_and:
|
|
case OPC_andb:
|
|
case OPC_xorb:
|
|
case OPC_xor:
|
|
break;
|
|
|
|
case OPC_mult:
|
|
case OPC_multl:
|
|
case OPC_div:
|
|
case OPC_divl:
|
|
|
|
*nostore = 1;
|
|
break;
|
|
|
|
case OPC_testb:
|
|
case OPC_test:
|
|
case OPC_testl:
|
|
case OPC_cp:
|
|
case OPC_cpb:
|
|
case OPC_cpl:
|
|
case OPC_bit:
|
|
*nostore = 1;
|
|
*before = 0;
|
|
break;
|
|
|
|
case OPC_bpt:
|
|
case OPC_jr:
|
|
case OPC_jp:
|
|
case OPC_ret:
|
|
case OPC_call:
|
|
case OPC_tcc:
|
|
*nosrc = 1;
|
|
*nostore = 1;
|
|
*before = 1;
|
|
break;
|
|
case OPC_sc:
|
|
*nostore = 1;
|
|
*before = 0;
|
|
break;
|
|
case OPC_clrb:
|
|
case OPC_clr:
|
|
*before = 1;
|
|
*nosrc = 1;
|
|
break;
|
|
case OPC_ldi:
|
|
case OPC_ldib:
|
|
case OPC_lddb:
|
|
case OPC_ldd:
|
|
|
|
*before = 1;
|
|
*nostore = 1;
|
|
*nosrc = 1;
|
|
break;
|
|
case OPC_ldk:
|
|
case OPC_ld:
|
|
case OPC_ldb:
|
|
case OPC_ldl:
|
|
*before = 1;
|
|
*getdst = 0;
|
|
break;
|
|
case OPC_push:
|
|
case OPC_pushl:
|
|
case OPC_pop:
|
|
case OPC_popl:
|
|
*before = 1;
|
|
*getdst = 0;
|
|
break;
|
|
case OPC_lda:
|
|
*nosrc = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* calculate the lvalues required for the opcode */
|
|
void
|
|
info_lvals (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
/* emit code to work out lvalues, if any */
|
|
unsigned int *i = p->arg_info;
|
|
|
|
while (*i)
|
|
{
|
|
current_name = reg_n (*i);
|
|
current_size = size_name (p->type);
|
|
switch (*i & CLASS_MASK)
|
|
{
|
|
case CLASS_X:
|
|
/* address(reg) */
|
|
emit ("register <addr_type> oplval_<name>= ((base_<name> + (short)get_word_reg(context,reg_<name>)) & 0xffff) + (base_<name> & ~0xffff);\n");
|
|
break;
|
|
case CLASS_IR:
|
|
/* Indirect register */
|
|
emit ("register int oplval_<name> = get_<ptr_mode>_reg(context,reg_<name>);\n");
|
|
break;
|
|
case CLASS_DA:
|
|
emit ("register int oplval_<name>=base_<name>;\n");
|
|
break;
|
|
case CLASS_IMM:
|
|
case CLASS_REG_WORD:
|
|
case CLASS_REG_LONG:
|
|
case CLASS_REG_BYTE:
|
|
case CLASS_PR:
|
|
break;
|
|
case CLASS_BA:
|
|
emit ("register int oplval_<name> = get_<ptr_mode>_reg(context,reg_<name>) + (short)(imm_src);\n");
|
|
break;
|
|
case CLASS_BX:
|
|
emit ("register int oplval_<name> = get_<ptr_mode>_reg(context,reg_<name>)\n");
|
|
emit (" + get_word_reg(context,reg_aux_x);\n");
|
|
break;
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
|
|
/* emit code to fetch the args from calculated lvalues */
|
|
int allregs;
|
|
void
|
|
info_fetch (p, getdst)
|
|
opcode_entry_type *p;
|
|
int getdst;
|
|
{
|
|
unsigned int *i = p->arg_info;
|
|
int had_src = 0;
|
|
|
|
allregs = 1;
|
|
while (*i)
|
|
{
|
|
|
|
current_name = reg_n (*i);
|
|
current_size = size_name (p->type);
|
|
switch (*i & CLASS_MASK)
|
|
{
|
|
case CLASS_X:
|
|
case CLASS_IR:
|
|
case CLASS_BA:
|
|
case CLASS_BX:
|
|
case CLASS_DA:
|
|
if (!getdst && IS_DST (*i))
|
|
break;
|
|
emit ("register int op_<name>= get_<size>_<mem>_da(context,oplval_<name>);\n");
|
|
allregs = 0;
|
|
break;
|
|
case CLASS_IMM:
|
|
if (!had_src)
|
|
{
|
|
if (p->opcode == OPC_out ||
|
|
p->opcode == OPC_outb ||
|
|
p->opcode == OPC_sout ||
|
|
p->opcode == OPC_soutb)
|
|
{
|
|
/* The imm is a dest here */
|
|
emit ("register int op_dst = imm_src;\n");
|
|
}
|
|
else
|
|
{
|
|
emit ("register int op_src = imm_src;\n");
|
|
}
|
|
}
|
|
break;
|
|
case CLASS_REG_QUAD:
|
|
if (!getdst && IS_DST (*i))
|
|
break;
|
|
had_src |= IS_SRC (*i);
|
|
emit ("UDItype op_<name> ;\n");
|
|
|
|
break;
|
|
case CLASS_REG_WORD:
|
|
if (!getdst && IS_DST (*i))
|
|
break;
|
|
had_src |= IS_SRC (*i);
|
|
emit ("register int op_<name> = get_word_reg(context,reg_<name>);\n");
|
|
break;
|
|
|
|
case CLASS_REG_LONG:
|
|
if (!getdst && IS_DST (*i))
|
|
break;
|
|
had_src |= IS_SRC (*i);
|
|
emit ("register int op_<name> = get_long_reg(context,reg_<name>);\n");
|
|
break;
|
|
case CLASS_REG_BYTE:
|
|
if (!getdst && IS_DST (*i))
|
|
break;
|
|
had_src |= IS_SRC (*i);
|
|
emit ("register int op_<name> = get_byte_reg(context,reg_<name>);\n");
|
|
break;
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
|
|
static void
|
|
normal_flags (p, s, neg)
|
|
opcode_entry_type *p;
|
|
char *s;
|
|
{
|
|
emit (" %s;\n", s);
|
|
emit ("NORMAL_FLAGS(context,%d, tmp, op_dst, op_src,%d); \n", p->type,neg);
|
|
}
|
|
|
|
static void
|
|
test_normal_flags (p, s, opt)
|
|
opcode_entry_type *p;
|
|
char *s;
|
|
int opt;
|
|
{
|
|
emit (" %s;\n", s);
|
|
if (0 && opt)
|
|
{
|
|
emit ("context->broken_flags = TST_FLAGS;\n");
|
|
emit ("context->size = %d;\n", p->type);
|
|
}
|
|
else
|
|
{
|
|
emit ("TEST_NORMAL_FLAGS(context,%d, tmp); \n", p->type);
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
optimize_normal_flags (p, s,neg)
|
|
opcode_entry_type *p;
|
|
char *s;
|
|
{
|
|
emit (" %s;\n", s);
|
|
#if 0
|
|
emit ("context->broken_flags = CMP_FLAGS;\n");
|
|
#else
|
|
emit ("NORMAL_FLAGS(context,%d, tmp, op_dst, op_src,%d); \n", p->type, neg);
|
|
#endif
|
|
}
|
|
|
|
static
|
|
void
|
|
jp (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
|
|
emit ("if(op_cc == 8 || COND(context,op_cc)) pc = oplval_dst;\n");
|
|
}
|
|
|
|
static void
|
|
jr (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
emit ("if(op_cc == 8 || COND(context,op_cc)) pc = oplval_dst;\n");
|
|
}
|
|
|
|
static void
|
|
ret (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
emit ("if(op_cc == 8 || COND(context,op_cc))\n{\n");
|
|
emit ("pc = get_<ptr_mode>_<mem>_ir(context,<sp>);\n");
|
|
emit ("put_<ptr_mode>_reg(context,<sp>, get_<ptr_mode>_reg(context,<sp>) + <ptr_size>);\n");
|
|
emit ("};\n");
|
|
}
|
|
|
|
static void
|
|
call (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
emit ("put_<ptr_mode>_reg(context,<sp>,tmp = get_<ptr_mode>_reg(context,<sp>) - <ptr_size>);\n");
|
|
emit ("put_<ptr_mode>_<mem>_da(context,tmp, pc);\n");
|
|
emit ("pc = oplval_dst;\n");
|
|
}
|
|
|
|
static void
|
|
push (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
emit ("tmp = op_src;\n");
|
|
emit ("oplval_dst -= %d;\n", p->type / 8);
|
|
emit ("put_<ptr_mode>_reg(context,reg_dst, oplval_dst);\n");
|
|
}
|
|
|
|
static void
|
|
pop (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
emit ("tmp = op_src;\n");
|
|
emit ("put_<ptr_mode>_reg(context,reg_src, oplval_src + %d);\n", p->type / 8);
|
|
}
|
|
|
|
static void
|
|
ld (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
emit ("tmp = op_src;\n");
|
|
}
|
|
|
|
static void
|
|
sc ()
|
|
{
|
|
emit ("support_call(context,imm_src);\n");
|
|
}
|
|
|
|
static void
|
|
bpt ()
|
|
{
|
|
emit ("pc -=2; \n");
|
|
emit ("context->exception = SIM_BREAKPOINT;\n");
|
|
}
|
|
|
|
static void
|
|
ldi (p, size, inc)
|
|
opcode_entry_type *p;
|
|
int size;
|
|
int inc;
|
|
{
|
|
int dinc = (size / 8) * inc;
|
|
|
|
current_size = size_name (size);
|
|
emit ("{ \n");
|
|
emit ("int type = %s;\n", insn_4 (7));
|
|
emit ("int rs = get_<ptr_mode>_reg(context,reg_src);\n");
|
|
emit ("int rd = get_<ptr_mode>_reg(context,reg_dst);\n");
|
|
emit ("int rr = get_word_reg(context,reg_aux_r);\n");
|
|
emit ("do {\n");
|
|
emit ("put_<size>_<mem>_da(context,rd, get_<size>_<mem>_da(context,rs));\n");
|
|
emit ("rd += %d;\n", dinc);
|
|
emit ("rs += %d;\n", dinc);
|
|
emit ("rr --;\n");
|
|
emit ("context->cycles += 9;\n");
|
|
emit ("} while (!type && rr != 0 && context->exception <= 1);\n");
|
|
emit ("if (context->exception>1) pc -=4;\n");
|
|
emit ("put_<ptr_mode>_reg(context,reg_src, rs);\n");
|
|
emit ("put_<ptr_mode>_reg(context,reg_dst, rd);\n");
|
|
emit ("put_word_reg(context,reg_aux_r, rr);\n");
|
|
emit ("}\n");
|
|
|
|
}
|
|
|
|
static void
|
|
shift (p, arith)
|
|
opcode_entry_type *p;
|
|
int arith;
|
|
{
|
|
|
|
/* We can't use `(char)' since char might be unsigned.
|
|
We can't use `(signed char)' because the compiler might be K&R.
|
|
This seems safe, since it only assumes that bytes are 8 bits. */
|
|
emit ("op_src = (op_src << (sizeof (int) * 8 - 8)) >> (sizeof (int) * 8 - 8);\n");
|
|
#if 0
|
|
/* Original code: fails if characters are unsigned. */
|
|
emit ("op_src = (char)op_src;\n");
|
|
#endif
|
|
emit ("if (op_src < 0) \n");
|
|
emit ("{\n");
|
|
emit ("op_src = -op_src;\n");
|
|
emit ("op_dst = (%s <c_size>)op_dst;\n", arith ? "" : "unsigned");
|
|
emit ("tmp = (%s op_dst) >> op_src;\n", arith ? "" : "(unsigned)");
|
|
emit ("context->carry = op_dst >> (op_src-1);\n", p->type);
|
|
emit ("}\n");
|
|
emit ("else\n");
|
|
emit ("{\n");
|
|
emit ("tmp = op_dst << op_src;\n");
|
|
emit ("context->carry = op_dst >> (%d - op_src);\n", p->type);
|
|
emit ("}\n");
|
|
emit ("context->zero = (<c_size>)tmp == 0;\n");
|
|
emit ("context->sign = (int)((<c_size>)tmp) < 0;\n");
|
|
emit ("context->overflow = ((int)tmp < 0) != ((int)op_dst < 0);\n");
|
|
emit ("context->cycles += 3*op_src;\n");
|
|
emit ("context->broken_flags = 0;\n");
|
|
|
|
}
|
|
|
|
static void
|
|
rotate (p, through_carry, size, left)
|
|
opcode_entry_type *p;
|
|
int through_carry;
|
|
int size;
|
|
int left;
|
|
{
|
|
|
|
if (!left)
|
|
{
|
|
emit ("while (op_src--) {\n");
|
|
emit ("int rotbit;\n");
|
|
emit ("rotbit = op_dst & 1;\n");
|
|
emit ("op_dst = ((unsigned)op_dst) >> 1;\n");
|
|
|
|
if (through_carry)
|
|
{
|
|
emit ("op_dst |= context->carry << %d;\n", size - 1);
|
|
}
|
|
else
|
|
{
|
|
emit ("op_dst |= rotbit << %d;\n", size - 1);
|
|
}
|
|
emit ("context->carry = rotbit;\n");
|
|
emit ("}\n");
|
|
}
|
|
else
|
|
{
|
|
emit ("while (op_src--) {\n");
|
|
emit ("int rotbit;\n");
|
|
|
|
emit ("rotbit = (op_dst >> (%d))&1;\n", size - 1);
|
|
emit ("op_dst <<=1;\n");
|
|
if (through_carry)
|
|
{
|
|
emit ("if (context->carry) op_dst |=1;\n");
|
|
}
|
|
else
|
|
{
|
|
emit ("if (rotbit) op_dst |= 1;\n");
|
|
}
|
|
emit ("context->carry = rotbit;\n");
|
|
emit ("}\n");
|
|
}
|
|
emit ("tmp = (<c_size>)op_dst;\n");
|
|
emit ("context->zero = tmp == 0;\n");
|
|
emit ("context->sign = (int)tmp < 0;\n");
|
|
emit ("context->overflow = ((int)tmp < 0) != ((int)op_dst < 0);\n");
|
|
emit ("context->cycles += 3*op_src;\n");
|
|
emit ("context->broken_flags = 0;\n");
|
|
|
|
}
|
|
|
|
static void
|
|
adiv (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
emit ("if (op_src==0)\n");
|
|
emit ("{\n");
|
|
emit ("context->exception = SIM_DIV_ZERO;\n");
|
|
emit ("}\n");
|
|
emit ("else\n");
|
|
emit ("{\n");
|
|
|
|
if (p->type == 32)
|
|
{
|
|
emit ("op_dst.low = (int)get_long_reg(context,reg_dst+2);\n");
|
|
emit ("op_dst.high = (int)get_long_reg(context,reg_dst+0);\n");
|
|
#ifdef __GNUC__
|
|
emit ("tmp = (((long long)op_dst.high << 32) + (op_dst.low)) / (int)op_src;\n");
|
|
#else
|
|
emit ("tmp = (long)op_dst.low / (int)op_src;\n");
|
|
#endif
|
|
emit ("put_long_reg(context,reg_dst+2, tmp);\n");
|
|
#ifdef __GNUC__
|
|
emit ("put_long_reg(context,reg_dst, (((long long)op_dst.high << 32) + (op_dst.low)) %% (int)op_src);\n");
|
|
#else
|
|
emit ("put_long_reg(context,reg_dst, (int)op_dst.low %% (int)op_src);\n");
|
|
#endif
|
|
|
|
emit ("context->zero = op_src == 0 || (op_dst.low==0 && op_dst.high==0);\n");
|
|
}
|
|
else
|
|
{
|
|
emit ("tmp = (long)op_dst / (short)op_src;\n");
|
|
emit ("put_word_reg(context,reg_dst+1, tmp);\n");
|
|
emit ("put_word_reg(context,reg_dst, (long) op_dst %% (short)op_src);\n");
|
|
emit ("context->zero = op_src == 0 || op_dst==0;\n");
|
|
}
|
|
|
|
emit ("context->sign = (int)tmp < 0;\n");
|
|
emit ("context->overflow =(tmp & 0x%x) != 0;\n",
|
|
~((1 << (p->type)) - 1));
|
|
emit ("context->carry = (tmp & 0x%x) != 0;\n",
|
|
~(1 << (p->type)));
|
|
|
|
emit ("}\n");
|
|
}
|
|
|
|
static void
|
|
dobit (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
emit("context->zero = (op_dst & (1<<op_src))==0;\n");
|
|
emit("context->broken_flags = 0;\n");
|
|
}
|
|
static void
|
|
doset (p, v)
|
|
opcode_entry_type*p;
|
|
int v;
|
|
{
|
|
if (v)
|
|
emit (" tmp = op_dst | (1<< op_src);\n");
|
|
else
|
|
emit (" tmp = op_dst & ~(1<< op_src);\n");
|
|
}
|
|
|
|
static void
|
|
mult (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
|
|
if (p->type == 32)
|
|
{
|
|
emit ("op_dst.low = get_long_reg(context,reg_dst+2);\n");
|
|
emit ("tmp = op_dst.low * op_src;\n");
|
|
emit ("put_long_reg(context,reg_dst+2, tmp);\n");
|
|
emit ("put_long_reg(context,reg_dst, 0);\n");
|
|
}
|
|
else
|
|
{
|
|
emit ("op_dst = get_word_reg(context,reg_dst+1);\n");
|
|
emit ("tmp = op_dst * op_src;\n");
|
|
emit ("put_long_reg(context,reg_dst, tmp);\n");
|
|
}
|
|
|
|
emit ("context->sign = (int)tmp < 0;\n");
|
|
emit ("context->overflow =0;\n");
|
|
emit ("context->carry = (tmp & 0x%x) != 0;\n", ~((1 << (p->type)) - 1));
|
|
emit ("context->zero = tmp == 0;\n");
|
|
|
|
}
|
|
|
|
static void
|
|
exts (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
/* Fetch the ls part of the src */
|
|
current_size = size_name (p->type * 2);
|
|
|
|
if (p->type == 32)
|
|
{
|
|
emit ("tmp= get_long_reg(context,reg_dst+2);\n");
|
|
emit ("if (tmp & (1<<%d)) {\n", p->type - 1);
|
|
emit ("put_long_reg(context,reg_dst, 0xffffffff);\n");
|
|
emit ("}\n");
|
|
emit ("else\n");
|
|
emit ("{\n");
|
|
emit ("put_long_reg(context,reg_dst, 0);\n");
|
|
emit ("}\n");
|
|
}
|
|
else
|
|
{
|
|
emit ("tmp= get_<size>_reg(context,reg_dst);\n");
|
|
emit ("if (tmp & (1<<%d)) {\n", p->type - 1);
|
|
emit ("tmp |= 0x%x;\n", ~((1 << p->type) - 1));
|
|
emit ("}\n");
|
|
emit ("else\n");
|
|
emit ("{\n");
|
|
|
|
emit ("tmp &= 0x%x;\n", ((1 << p->type) - 1));
|
|
emit ("}\n");
|
|
emit ("put_<size>_reg(context,reg_dst, tmp);\n");
|
|
}
|
|
}
|
|
doflag(on)
|
|
int on;
|
|
{
|
|
/* Load up the flags */
|
|
emit(" COND (context, 0x0b);\n");
|
|
|
|
if (on)
|
|
emit ("{ int on =1;\n ");
|
|
else
|
|
emit ("{ int on =0;\n ");
|
|
|
|
emit ("if (imm_src & 1)\n");
|
|
emit ("PSW_OVERFLOW = on;\n");
|
|
|
|
emit ("if (imm_src & 2)\n");
|
|
emit ("PSW_SIGN = on;\n");
|
|
|
|
emit ("if (imm_src & 4)\n");
|
|
emit ("PSW_ZERO = on;\n");
|
|
|
|
emit ("if (imm_src & 8)\n");
|
|
emit ("PSW_CARRY = on;\n");
|
|
emit("}\n");
|
|
|
|
|
|
}
|
|
/* emit code to perform operation */
|
|
void
|
|
info_docode (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
switch (p->opcode)
|
|
{
|
|
case OPC_clr:
|
|
case OPC_clrb:
|
|
emit ("tmp = 0;\n");
|
|
break;
|
|
case OPC_ex:
|
|
case OPC_exb:
|
|
|
|
emit ("tmp = op_src; \n");
|
|
if (allregs)
|
|
{
|
|
emit ("put_<size>_reg(context,reg_src, op_dst);\n");
|
|
}
|
|
else
|
|
{
|
|
emit ("put_<size>_mem_da(context, oplval_src, op_dst);\n");
|
|
}
|
|
break;
|
|
case OPC_adc:
|
|
case OPC_adcb:
|
|
normal_flags (p, "op_src += COND(context,7);tmp = op_dst + op_src ;",0);
|
|
break;
|
|
case OPC_sbc:
|
|
normal_flags (p, "op_src += COND(context,7);tmp = op_dst - op_src ;",1);
|
|
break;
|
|
case OPC_nop:
|
|
break;
|
|
case OPC_com:
|
|
case OPC_comb:
|
|
test_normal_flags (p, "tmp = ~ op_dst", 1);
|
|
break;
|
|
case OPC_and:
|
|
case OPC_andb:
|
|
test_normal_flags (p, "tmp = op_dst & op_src", 1);
|
|
break;
|
|
case OPC_xor:
|
|
case OPC_xorb:
|
|
test_normal_flags (p, "tmp = op_dst ^ op_src", 1);
|
|
break;
|
|
case OPC_or:
|
|
case OPC_orb:
|
|
test_normal_flags (p, "tmp = op_dst | op_src", 1);
|
|
break;
|
|
case OPC_sla:
|
|
case OPC_slab:
|
|
case OPC_slal:
|
|
case OPC_sda:
|
|
case OPC_sdab:
|
|
case OPC_sdal:
|
|
shift (p, 1);
|
|
break;
|
|
|
|
case OPC_sll:
|
|
case OPC_sllb:
|
|
case OPC_slll:
|
|
case OPC_sdl:
|
|
case OPC_sdlb:
|
|
case OPC_sdll:
|
|
shift (p, 0);
|
|
break;
|
|
case OPC_rl:
|
|
rotate (p, 0, 16, 1);
|
|
break;
|
|
case OPC_rlb:
|
|
rotate (p, 0, 8, 1);
|
|
break;
|
|
case OPC_rr:
|
|
rotate (p, 0, 16, 0);
|
|
break;
|
|
case OPC_rrb:
|
|
rotate (p, 0, 8, 0);
|
|
break;
|
|
case OPC_rrc:
|
|
rotate (p, 1, 16, 0);
|
|
break;
|
|
case OPC_rrcb:
|
|
rotate (p, 1, 8, 0);
|
|
break;
|
|
case OPC_rlc:
|
|
rotate (p, 1, 16, 1);
|
|
break;
|
|
case OPC_rlcb:
|
|
rotate (p, 1, 8, 1);
|
|
break;
|
|
|
|
case OPC_extsb:
|
|
case OPC_exts:
|
|
case OPC_extsl:
|
|
exts (p);
|
|
break;
|
|
case OPC_add:
|
|
case OPC_addb:
|
|
case OPC_addl:
|
|
case OPC_inc:
|
|
case OPC_incb:
|
|
optimize_normal_flags (p, "tmp = op_dst + op_src",0);
|
|
break;
|
|
case OPC_testb:
|
|
case OPC_test:
|
|
case OPC_testl:
|
|
test_normal_flags (p, "tmp = op_dst", 0);
|
|
break;
|
|
case OPC_cp:
|
|
case OPC_cpb:
|
|
case OPC_cpl:
|
|
normal_flags (p, "tmp = op_dst - op_src",1);
|
|
break;
|
|
case OPC_negb:
|
|
case OPC_neg:
|
|
emit ("{\n");
|
|
emit ("int op_src = -op_dst;\n");
|
|
emit ("op_dst = 0;\n");
|
|
optimize_normal_flags (p, "tmp = op_dst + op_src;\n",1);
|
|
emit ("}");
|
|
break;
|
|
|
|
case OPC_sub:
|
|
case OPC_subb:
|
|
case OPC_subl:
|
|
case OPC_dec:
|
|
case OPC_decb:
|
|
optimize_normal_flags (p, "tmp = op_dst - op_src",1);
|
|
break;
|
|
case OPC_bpt:
|
|
bpt ();
|
|
break;
|
|
case OPC_jr:
|
|
jr (p);
|
|
break;
|
|
case OPC_sc:
|
|
sc ();
|
|
break;
|
|
case OPC_jp:
|
|
jp (p);
|
|
break;
|
|
case OPC_ret:
|
|
ret (p);
|
|
break;
|
|
case OPC_call:
|
|
call (p);
|
|
break;
|
|
case OPC_tcc:
|
|
case OPC_tccb:
|
|
emit ("if(op_cc == 8 || COND(context,op_cc)) put_word_reg(context,reg_dst, 1);\n");
|
|
break;
|
|
case OPC_lda:
|
|
emit ("tmp = oplval_src; \n");
|
|
/*(((oplval_src) & 0xff0000) << 8) | (oplval_src & 0xffff); \n");*/
|
|
break;
|
|
case OPC_ldk:
|
|
case OPC_ld:
|
|
|
|
case OPC_ldb:
|
|
case OPC_ldl:
|
|
ld (p);
|
|
break;
|
|
case OPC_ldib:
|
|
ldi (p, 8, 1);
|
|
break;
|
|
case OPC_ldi:
|
|
ldi (p, 16, 1);
|
|
break;
|
|
|
|
case OPC_lddb:
|
|
ldi (p, 8, -1);
|
|
break;
|
|
case OPC_ldd:
|
|
ldi (p, 16, -1);
|
|
break;
|
|
|
|
case OPC_push:
|
|
case OPC_pushl:
|
|
push (p);
|
|
break;
|
|
|
|
case OPC_div:
|
|
case OPC_divl:
|
|
adiv (p);
|
|
break;
|
|
case OPC_mult:
|
|
case OPC_multl:
|
|
mult (p);
|
|
break;
|
|
case OPC_pop:
|
|
case OPC_popl:
|
|
pop (p);
|
|
break;
|
|
case OPC_set:
|
|
doset (p,1);
|
|
break;
|
|
case OPC_res:
|
|
doset (p,0);
|
|
break;
|
|
case OPC_bit:
|
|
dobit(p);
|
|
break;
|
|
case OPC_resflg:
|
|
doflag(0);
|
|
break;
|
|
case OPC_setflg:
|
|
doflag(1);
|
|
break;
|
|
default:
|
|
|
|
emit ("tmp = fail(context,%d);\n", p->opcode);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* emit code to store result in calculated lvalue */
|
|
|
|
void
|
|
info_store (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
unsigned int *i = p->arg_info;
|
|
|
|
while (*i)
|
|
{
|
|
current_name = reg_n (*i);
|
|
current_size = size_name (p->type);
|
|
|
|
if (IS_DST (*i))
|
|
{
|
|
switch (*i & CLASS_MASK)
|
|
{
|
|
case CLASS_PR:
|
|
emit ("put_<ptr_mode>_reg(context,reg_<name>, tmp);\n");
|
|
break;
|
|
case CLASS_REG_LONG:
|
|
case CLASS_REG_WORD:
|
|
case CLASS_REG_BYTE:
|
|
|
|
emit ("put_<size>_reg(context,reg_<name>,tmp);\n");
|
|
break;
|
|
case CLASS_X:
|
|
case CLASS_IR:
|
|
case CLASS_DA:
|
|
case CLASS_BX:
|
|
case CLASS_BA:
|
|
|
|
emit ("put_<size>_<mem>_da(context,oplval_<name>, tmp);\n");
|
|
break;
|
|
case CLASS_IMM:
|
|
break;
|
|
default:
|
|
emit ("abort(); ");
|
|
break;
|
|
}
|
|
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
|
|
static
|
|
void
|
|
mangle (p, shortcut, value)
|
|
opcode_entry_type *p;
|
|
int shortcut;
|
|
int value;
|
|
{
|
|
int nostore = 0;
|
|
int extra;
|
|
int getdst = 1;
|
|
int before = 0;
|
|
int nosrc = 0;
|
|
|
|
emit ("/\052 %s \052/\n", p->nicename);
|
|
if (shortcut)
|
|
{
|
|
emit ("int <fop>_%04x(context,pc)\n", value);
|
|
}
|
|
else
|
|
{
|
|
emit ("int <fop>_%d(context,pc,iwords0)\n", p->idx);
|
|
emit ("int iwords0;\n");
|
|
}
|
|
emit ("sim_state_type *context;\n");
|
|
emit ("int pc;\n");
|
|
emit ("{\n");
|
|
emit ("register unsigned int tmp;\n");
|
|
if (shortcut)
|
|
{
|
|
emit ("register unsigned int iwords0 = 0x%x;\n", value);
|
|
}
|
|
|
|
/* work out how much bigger this opcode could be because it's large
|
|
model */
|
|
if (BIG)
|
|
{
|
|
int i;
|
|
|
|
extra = 0;
|
|
for (i = 0; i < 4; i++)
|
|
{
|
|
if ((p->arg_info[i] & CLASS_MASK) == CLASS_DA
|
|
|| (p->arg_info[i] & CLASS_MASK) == CLASS_X)
|
|
extra += 2;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
extra = 0;
|
|
}
|
|
printf (" /* Length %d */ \n", p->length + extra);
|
|
switch (p->length + extra)
|
|
{
|
|
case 2:
|
|
emit ("pc += 2\n;");
|
|
break;
|
|
case 4:
|
|
emit ("register unsigned int iwords1 = get_word_mem_da(context,pc+2);\n");
|
|
emit ("pc += 4;\n");
|
|
break;
|
|
case 6:
|
|
|
|
emit ("register unsigned int iwords1 = get_word_mem_da(context,pc+2);\n");
|
|
emit ("register unsigned int iwords2 = get_word_mem_da(context,pc+4);\n");
|
|
emit ("pc += 6;\n");
|
|
break;
|
|
case 8:
|
|
emit ("register unsigned int iwords1 = get_word_mem_da(context,pc+2);\n");
|
|
emit ("register unsigned int iwords2 = get_word_mem_da(context,pc+4);\n");
|
|
emit ("register unsigned int iwords3 = get_word_mem_da(context,pc+6);\n");
|
|
emit ("pc += 8;\n");
|
|
break;
|
|
default:
|
|
break;
|
|
|
|
}
|
|
emit ("context->cycles += %d;\n", p->cycles);
|
|
|
|
emit ("{\n");
|
|
info_args (p);
|
|
info_special (p, &getdst, &nostore, &before, &nosrc);
|
|
|
|
info_lvals (p);
|
|
if (!nosrc)
|
|
{
|
|
info_fetch (p, getdst);
|
|
}
|
|
|
|
if (before)
|
|
{
|
|
info_docode (p);
|
|
}
|
|
else
|
|
{
|
|
info_docode (p);
|
|
}
|
|
if (!nostore)
|
|
info_store (p);
|
|
emit ("}\n");
|
|
emit ("return pc;\n");
|
|
emit ("}\n");
|
|
}
|
|
|
|
void
|
|
static
|
|
one_instruction (i)
|
|
int i;
|
|
{
|
|
/* find the table entry */
|
|
opcode_entry_type *p = z8k_table + i;
|
|
|
|
if (!p)
|
|
return;
|
|
mangle (p, 0, 0);
|
|
}
|
|
|
|
void
|
|
add_to_list (ptr, value)
|
|
struct opcode_value **ptr;
|
|
int value;
|
|
{
|
|
struct opcode_value *prev;
|
|
|
|
prev = *ptr;
|
|
*ptr = (struct opcode_value *) malloc (sizeof (struct opcode_value));
|
|
|
|
(*ptr)->n = value;
|
|
(*ptr)->next = prev;
|
|
}
|
|
|
|
void
|
|
build_list (i)
|
|
int i;
|
|
{
|
|
opcode_entry_type *p = lookup_inst (i);
|
|
|
|
if (!p)
|
|
return;
|
|
add_to_list (&list[p->idx], i);
|
|
}
|
|
|
|
int
|
|
main (ac, av)
|
|
int ac;
|
|
char **av;
|
|
{
|
|
int i;
|
|
int needcomma = 0;
|
|
|
|
for (i = 1; i < ac; i++)
|
|
{
|
|
if (strcmp (av[i], "-1") == 0)
|
|
file = 1;
|
|
if (strcmp (av[i], "-2") == 0)
|
|
file = 2;
|
|
if (strcmp (av[i], "-3") == 0)
|
|
file = 3;
|
|
if (strcmp (av[i], "-b3") == 0)
|
|
{
|
|
file = 3;
|
|
BIG = 1;
|
|
}
|
|
|
|
}
|
|
|
|
/* First work out which opcodes use which bit patterns,
|
|
build a list of all matching bit pattens */
|
|
for (i = 0; i < 1 << 16; i++)
|
|
{
|
|
build_list (i);
|
|
}
|
|
#if DUMP_LIST
|
|
for (i = 0; i < NOPS; i++)
|
|
{
|
|
struct opcode_value *p;
|
|
|
|
printf ("%d,", i);
|
|
p = list[i];
|
|
while (p)
|
|
{
|
|
printf (" %04x,", p->n);
|
|
p = p->next;
|
|
}
|
|
printf ("-1\n");
|
|
}
|
|
|
|
#endif
|
|
|
|
if (file == 1)
|
|
{
|
|
extern int quick[];
|
|
|
|
/* Do the shortcuts */
|
|
printf (" /* SHORTCUTS */\n");
|
|
for (i = 0; quick[i]; i++)
|
|
{
|
|
int t = quick[i];
|
|
|
|
mangle (lookup_inst (t), 1, t);
|
|
}
|
|
}
|
|
if (file == 3)
|
|
{
|
|
printf (" /* NOT -SHORTCUTS */\n");
|
|
for (i = 0; i < NOPS; i++)
|
|
{
|
|
if (list[i])
|
|
{
|
|
one_instruction (i);
|
|
}
|
|
else
|
|
{
|
|
emit ("int <fop>_%d(context,pc)\n", i);
|
|
printf ("sim_state_type *context;\n");
|
|
printf ("int pc;\n");
|
|
emit ("{ <fop>_bad1();return pc; }\n");
|
|
}
|
|
}
|
|
emit ("int <fop>_bad() ;\n");
|
|
|
|
/* Write the jump table */
|
|
emit ("int (*(<fop>_table[]))() = {");
|
|
needcomma = 0;
|
|
for (i = 0; i < NOPS; i++)
|
|
{
|
|
if (needcomma)
|
|
printf (",");
|
|
emit ("<fop>_%d\n", i);
|
|
needcomma = 1;
|
|
}
|
|
emit ("};\n");
|
|
}
|
|
|
|
if (file == 2)
|
|
{
|
|
extern int quick[];
|
|
/* Static - since it's too be to be automatic on the apollo */
|
|
static int big[64 * 1024];
|
|
|
|
for (i = 0; i < 64 * 1024; i++)
|
|
big[i] = 0;
|
|
|
|
for (i = 0; quick[i]; i++)
|
|
{
|
|
#if 0
|
|
|
|
printf ("extern int <fop>_%04x();\n", quick[i]);
|
|
#endif
|
|
|
|
big[quick[i]] = 1;
|
|
}
|
|
|
|
for (i = 0; i < NOPS; i++)
|
|
{
|
|
#if 0
|
|
printf ("extern int fop_%d();\n", i);
|
|
#endif
|
|
}
|
|
#if 0
|
|
printf ("extern int fop_bad();\n");
|
|
#endif
|
|
printf ("struct op_info op_info_table[] = {\n");
|
|
for (i = 0; i < 1 << 16; i++)
|
|
{
|
|
opcode_entry_type *p = lookup_inst (i);
|
|
|
|
if (needcomma)
|
|
printf (",");
|
|
#if 0
|
|
if (big[i])
|
|
{
|
|
printf ("<fop>_%04x", i);
|
|
}
|
|
else
|
|
#endif
|
|
if (p != NULL)
|
|
{
|
|
printf ("%d", p->idx);
|
|
}
|
|
else
|
|
printf ("400");
|
|
if (p != NULL)
|
|
{
|
|
printf (" /* %04x %s */\n", i, p->nicename);
|
|
}
|
|
else
|
|
{
|
|
printf ("\n");
|
|
}
|
|
needcomma = 1;
|
|
}
|
|
printf ("};\n");
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
char *
|
|
insn_ptr (n)
|
|
int n;
|
|
{
|
|
if (BIG)
|
|
{
|
|
abort ();
|
|
}
|
|
|
|
switch (n)
|
|
{
|
|
case 4:
|
|
return "iwords_1";
|
|
default:
|
|
return "fail(context,123)";
|
|
}
|
|
}
|
|
|
|
/* work out if the opcode only wants lvalues */
|
|
int
|
|
lvalue (p)
|
|
opcode_entry_type *p;
|
|
{
|
|
switch (p->opcode)
|
|
{
|
|
case OPC_lda:
|
|
return 1;
|
|
case OPC_call:
|
|
case OPC_jp:
|
|
return 1;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int
|
|
info_len_in_words (o)
|
|
opcode_entry_type *o;
|
|
{
|
|
unsigned int *p = o->byte_info;
|
|
int nibs = 0;
|
|
|
|
while (*p)
|
|
{
|
|
switch (*p & CLASS_MASK)
|
|
{
|
|
case CLASS_IGNORE:
|
|
case CLASS_BIT:
|
|
case CLASS_REGN0:
|
|
case CLASS_REG:
|
|
case CLASS_01II:
|
|
case CLASS_00II:
|
|
nibs++;
|
|
break;
|
|
case CLASS_ADDRESS:
|
|
nibs += SIZE_ADDRESS;
|
|
break;
|
|
case CLASS_IMM:
|
|
switch (*p & ~CLASS_MASK)
|
|
{
|
|
case ARG_IMM16:
|
|
nibs += 4;
|
|
break;
|
|
case ARG_IMM32:
|
|
nibs += 8;
|
|
break;
|
|
case ARG_IMM2:
|
|
case ARG_IMM4:
|
|
case ARG_NIM4:
|
|
case ARG_IMM4M1:
|
|
case ARG_IMM_1:
|
|
case ARG_IMM_2:
|
|
case ARG_IMMNMINUS1:
|
|
nibs++;
|
|
break;
|
|
case ARG_NIM8:
|
|
|
|
case ARG_IMM8:
|
|
nibs += 2;
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
break;
|
|
case CLASS_DISP:
|
|
switch (*p & ~CLASS_MASK)
|
|
{
|
|
case ARG_DISP16:
|
|
nibs += 4;
|
|
break;
|
|
case ARG_DISP12:
|
|
nibs += 3;
|
|
break;
|
|
case ARG_DISP8:
|
|
nibs += 2;
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
break;
|
|
case CLASS_0DISP7:
|
|
case CLASS_1DISP7:
|
|
case CLASS_DISP8:
|
|
nibs += 2;
|
|
break;
|
|
case CLASS_BIT_1OR2:
|
|
case CLASS_0CCC:
|
|
case CLASS_1CCC:
|
|
case CLASS_CC:
|
|
nibs++;
|
|
break;
|
|
default:
|
|
emit ("don't know %x\n", *p);
|
|
}
|
|
p++;
|
|
}
|
|
|
|
return nibs / 4; /* return umber of words */
|
|
}
|