mirror of
https://github.com/pConst/basic_verilog.git
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280 lines
7.6 KiB
Java
280 lines
7.6 KiB
Java
/*
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Copyright (c) 2004, 2006 Pablo Bleyer Kocik.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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import java.util.Vector;
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import java.util.HashMap;
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/** Assembly instruction factory for PicoBlaze-3. */
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public class Instruction3 extends Instruction {
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static final String[] opname = {
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"add",
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"addcy",
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"and",
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"compare",
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"or",
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"rl",
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"sl0",
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"sl1",
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"sla",
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"slx",
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"rr",
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"sr0",
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"sr1",
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"sra",
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"srx",
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"sub",
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"subcy",
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"test",
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"xor",
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"call",
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"interrupt",
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"enable",
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"disable",
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"fetch",
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"input",
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"jump",
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"load",
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"output",
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"return",
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"returni",
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"store",
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"mul",
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"addw",
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"addwcy",
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"subw",
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"subwcy"
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};
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static final int[] opcode = {
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0x0c<<13, // add
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0x0d<<13, // addcy
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0x05<<13, // and
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0x0a<<13, // compare
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0x06<<13, // or
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0x10<<13|0x2, // rl
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0x10<<13|0x6, // sl0
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0x10<<13|0x7, // sl1
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0x10<<13|0x0, // sla
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0x10<<13|0x4, // slx
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0x10<<13|0xc, // rr
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0x10<<13|0xe, // sr0
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0x10<<13|0xf, // sr1
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0x10<<13|0x8, // sra
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0x10<<13|0xa, // srx
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0x0e<<13, // sub
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0x0f<<13, // subcy
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0x09<<13, // test
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0x07<<13, // xor
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0x18<<13, // call
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0x1e<<13, // interrupt
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0x1e<<13, // interrupt
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0x1e<<13, // interrupt
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0x03<<13, // fetch
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0x02<<13, // input
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0x1a<<13, // jump
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0x00<<13, // load
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0x16<<13, // output
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0x15<<13, // return
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0x1c<<13, // returni
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0x17<<13, // store
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0x1f<<13, // mul
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0x11<<13, // addw
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0x12<<13, // addwcy
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0x13<<13, // subw
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0x14<<13, // subwcy
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};
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public Instruction3() {
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super(opname, opcode);
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ifz = 0x4<<10;
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ifnz = 0x5<<10;
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ifc = 0x6<<10;
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ifnc = 0x7<<10;
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implied = 0<<12;
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register = 1<<12;
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disable = 0<<0;
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enable = 1<<0;
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posx = 8;
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posy = 4;
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}
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public int code(String insn, Vector arg, Environment env)
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throws IllegalArgumentException {
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String ins = insn.toLowerCase();
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if (!map.containsKey(ins))
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throw new IllegalArgumentException(
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"Unrecognized instruction '" + ins + "'"
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);
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int ic = map.get(ins);
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if (
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ins.equalsIgnoreCase("add")
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|| ins.equalsIgnoreCase("addcy")
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|| ins.equalsIgnoreCase("and")
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|| ins.equalsIgnoreCase("compare")
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|| ins.equalsIgnoreCase("or")
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|| ins.equalsIgnoreCase("sub")
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|| ins.equalsIgnoreCase("subcy")
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|| ins.equalsIgnoreCase("test")
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|| ins.equalsIgnoreCase("xor")
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|| ins.equalsIgnoreCase("fetch")
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|| ins.equalsIgnoreCase("store")
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|| ins.equalsIgnoreCase("input")
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|| ins.equalsIgnoreCase("output")
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|| ins.equalsIgnoreCase("load")
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|| ins.equalsIgnoreCase("mul")
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|| ins.equalsIgnoreCase("addw")
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|| ins.equalsIgnoreCase("addwcy")
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|| ins.equalsIgnoreCase("subw")
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|| ins.equalsIgnoreCase("subwcy")
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) {
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if (arg == null || arg.size() != 2)
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throw new IllegalArgumentException();
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// find target/first operand register
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Integer a = env.resolve(arg.get(0), Symbol.Type.REGISTER);
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if (a == null) throw new IllegalArgumentException();
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// find second operand
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Object b = arg.get(1);
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if (b == null) throw new IllegalArgumentException();
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// implied integer value operand
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if (b instanceof Integer)
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return ic|implied|(a<<posx)|((Integer)b);
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// search symbol
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else {
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Symbol s = env.symbols.get((String)b);
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if (s == null) { // try converting to hex number
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Integer x = env.resolve((String)b);
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if (x != null) return ic|implied|(a<<posx)|x; // implied hex
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else throw new IllegalArgumentException();
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}
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else { // symbol found
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if (s.type == Symbol.Type.REGISTER)
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return ic|register|(a<<posx)|(((Integer)s.value)<<posy);
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else
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return ic|implied|(a<<posx)|((Integer)s.value);
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}
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}
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}
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else if (
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ins.equalsIgnoreCase("rl")
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|| ins.equalsIgnoreCase("sl0")
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|| ins.equalsIgnoreCase("sl1")
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|| ins.equalsIgnoreCase("sla")
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|| ins.equalsIgnoreCase("slx")
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|| ins.equalsIgnoreCase("rr")
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|| ins.equalsIgnoreCase("sr0")
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|| ins.equalsIgnoreCase("sr1")
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|| ins.equalsIgnoreCase("sra")
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|| ins.equalsIgnoreCase("srx")
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) {
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if (arg == null || arg.size() != 1)
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throw new IllegalArgumentException("Bad shift/rotate arguments");
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// find target/first operand register
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Integer a = env.resolve(arg.get(0), Symbol.Type.REGISTER);
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if (a == null) throw new IllegalArgumentException();
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return ic|(a<<posx);
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}
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else if (
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ins.equalsIgnoreCase("call")
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|| ins.equalsIgnoreCase("jump")
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) {
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Object a = null, b = null;
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int l = (arg == null) ? 0 : arg.size();
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if (l > 2) throw new IllegalArgumentException();
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if (l > 0) a = arg.get(0);
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if (l > 1) b = arg.get(1);
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if (l == 1) {
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if (a instanceof Integer) return ic|((Integer)a);
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else if (a instanceof String) {
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Symbol s = env.symbols.get(a);
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if (s == null || s.type == Symbol.Type.REGISTER) throw new IllegalArgumentException();
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return ic|((Integer)s.value);
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}
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}
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else if (l == 2) {
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// a is condition code
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if (!(a instanceof String)) throw new IllegalArgumentException();
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if (b instanceof Integer)
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return ic|translateCondition((String)a)|((Integer)b);
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else if (b instanceof String) {
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Symbol s = env.symbols.get((String)b);
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if (s == null) {
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Integer x = env.resolve((String)b);
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if (x!= null) return ic|translateCondition((String)a)|x;
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else throw new IllegalArgumentException();
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}
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else if (s.type == Symbol.Type.REGISTER) throw new IllegalArgumentException();
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return ic|translateCondition((String)a)|((Integer)s.value);
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}
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}
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}
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else if (
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ins.equalsIgnoreCase("return")
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|| ins.equalsIgnoreCase("returni")
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|| ins.equalsIgnoreCase("interrupt")
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) {
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Object a = null;
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int l = (arg == null) ? 0 : arg.size();
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if (l > 1) throw new IllegalArgumentException();
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if (l == 1) a = arg.get(0);
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if (l == 0) {
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if (ins.equalsIgnoreCase("return")) return ic;
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}
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else {
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if (!(a instanceof String)) throw new IllegalArgumentException();
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if (ins.equalsIgnoreCase("return")) return ic|translateCondition((String)a);
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else return ic|translateAction((String)a);
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}
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}
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else if (
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ins.equalsIgnoreCase("enable")
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|| ins.equalsIgnoreCase("disable")
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) {
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Object a = null;
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int l = (arg == null) ? 0 : arg.size();
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if (arg == null || arg.size() != 1) throw new IllegalArgumentException();
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a = arg.get(0);
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if (!(a instanceof String) || !((String)a).equalsIgnoreCase("interrupt"))
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throw new IllegalArgumentException();
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return ic|translateAction(ins);
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}
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throw new IllegalArgumentException();
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}
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}
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