| 1 |
879 |
markom |
/* insn.c -- OpenRISC Custom Unit Compiler, instruction support
|
| 2 |
|
|
* Copyright (C) 2002 Marko Mlinar, markom@opencores.org
|
| 3 |
|
|
*
|
| 4 |
|
|
* This file is part of OpenRISC 1000 Architectural Simulator.
|
| 5 |
|
|
*
|
| 6 |
|
|
* This program is free software; you can redistribute it and/or modify
|
| 7 |
|
|
* it under the terms of the GNU General Public License as published by
|
| 8 |
|
|
* the Free Software Foundation; either version 2 of the License, or
|
| 9 |
|
|
* (at your option) any later version.
|
| 10 |
|
|
*
|
| 11 |
|
|
* This program is distributed in the hope that it will be useful,
|
| 12 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 13 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 14 |
|
|
* GNU General Public License for more details.
|
| 15 |
|
|
*
|
| 16 |
|
|
* You should have received a copy of the GNU General Public License
|
| 17 |
|
|
* along with this program; if not, write to the Free Software
|
| 18 |
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
| 19 |
|
|
|
| 20 |
|
|
#include <stdio.h>
|
| 21 |
|
|
#include <stdlib.h>
|
| 22 |
|
|
#include <stdarg.h>
|
| 23 |
|
|
#include <assert.h>
|
| 24 |
|
|
#include "cuc.h"
|
| 25 |
|
|
#include "insn.h"
|
| 26 |
|
|
|
| 27 |
|
|
/* Table of known instructions. Watch out for indexes I_*! */
|
| 28 |
|
|
const cuc_known_insn known[II_LAST + 1] = {
|
| 29 |
|
|
{"add", 1, "assign \1 = \2 + \3;"},
|
| 30 |
|
|
{"sub", 0, "assign \1 = \2 - \3;"},
|
| 31 |
|
|
{"and", 1, "assign \1 = \2 & \3;"},
|
| 32 |
|
|
{"or", 1, "assign \1 = \2 | \3;"},
|
| 33 |
|
|
{"xor", 1, "assign \1 = \2 ^ \3;"},
|
| 34 |
|
|
{"mul", 1, "assign \1 = \2 * \3;"},
|
| 35 |
|
|
|
| 36 |
|
|
{"srl", 0, "assign \1 = \2 >> \3;"},
|
| 37 |
|
|
{"sll", 0, "assign \1 = \2 << \3;"},
|
| 38 |
|
|
{"sra", 0, "assign \1 = ({32{\2[31]}} << (6'd32-{1'b0, \3}))\n\
|
| 39 |
|
|
| \2 >> \3;"},
|
| 40 |
|
|
|
| 41 |
|
|
{"lb", 0, "always @(posedge clk or posedge rst)"},
|
| 42 |
|
|
{"lh", 0, "always @(posedge clk or posedge rst)"},
|
| 43 |
|
|
{"lw", 0, "always @(posedge clk or posedge rst)"},
|
| 44 |
|
|
{"sb", 0, "/* mem8[\2] = \1 */"},
|
| 45 |
|
|
{"sh", 0, "/* mem16[\2] = \1 */"},
|
| 46 |
|
|
{"sw", 0, "/* mem32[\2] = \1 */"},
|
| 47 |
|
|
|
| 48 |
|
|
{"sfeq", 1, "assign \1 = \2 == \3;"},
|
| 49 |
|
|
{"sfne", 1, "assign \1 = \2 != \3;"},
|
| 50 |
|
|
{"sfle", 0, "assign \1 = \2 <= \3;"},
|
| 51 |
|
|
{"sflt", 0, "assign \1 = \2 < \3;"},
|
| 52 |
|
|
{"sfgt", 0, "assign \1 = \2 > \3;"},
|
| 53 |
|
|
{"sfge", 0, "assign \1 = \2 >= \3;"},
|
| 54 |
|
|
{"sfor", 1, "assign \1 = \2 || \3;"},
|
| 55 |
|
|
{"bf", 0, ""},
|
| 56 |
|
|
|
| 57 |
|
|
{"lrbb", 0,"always @(posedge clk or posedge rst)"},
|
| 58 |
|
|
{"cmov", 0,"assign \1 = \4 ? \2 : \3;"},
|
| 59 |
|
|
{"reg", 0, "always @(posedge clk or posedge rst)"},
|
| 60 |
|
|
|
| 61 |
|
|
{"nop", 0, NULL}};
|
| 62 |
|
|
|
| 63 |
|
|
/* Find known instruction and attach them to insn */
|
| 64 |
|
|
void change_insn_type (cuc_insn *i, int index)
|
| 65 |
|
|
{
|
| 66 |
|
|
int j;
|
| 67 |
|
|
assert (index >= 0 && index <= II_LAST);
|
| 68 |
|
|
i->index = index;
|
| 69 |
|
|
if (i->index == II_NOP) {
|
| 70 |
|
|
for (j = 0; j < MAX_OPERANDS; j++) i->opt[j] = OPT_NONE;
|
| 71 |
|
|
i->type = 0;
|
| 72 |
|
|
i->dep = NULL;
|
| 73 |
|
|
}
|
| 74 |
|
|
}
|
| 75 |
|
|
|
| 76 |
|
|
/* Returns instruction name */
|
| 77 |
|
|
const char *cuc_insn_name (cuc_insn *ii) {
|
| 78 |
|
|
if (ii->index < 0 || ii->index > II_LAST) return "???";
|
| 79 |
|
|
else return known[ii->index].name;
|
| 80 |
|
|
}
|
