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[/] [zipcpu/] [trunk/] [sw/] [zasm/] [zparser.cpp] - Blame information for rev 42

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1 2 dgisselq 
////////////////////////////////////////////////////////////////////////////////
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//
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// Filename:    zparser.cpp
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//
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// Project:     Zip CPU -- a small, lightweight, RISC CPU core
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//
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// Purpose:     This file is really mis-named.  At one time it was going to
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//              be the parser for the Zip Assembler, zasm.  Since then, I
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//              discovered Flex and Bison and have written a parser using
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//              those tools.  The true parser may therefore be found in zasm.y.
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//              This file, however, still contains some very valuable tools.
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//              In particular, all of the routines used to build instructions
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//              from the appropriate fields are kept in this file.  For example,
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//              op_noop() returns the instruction code for a NOOP  instruction.
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//
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// Creator:     Dan Gisselquist, Ph.D.
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//              Gisselquist Tecnology, LLC
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//
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////////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2015, Gisselquist Technology, LLC
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//
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// This program is free software (firmware): you can redistribute it and/or
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// modify it under the terms of  the GNU General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or (at
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// your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program.  (It's in the $(ROOT)/doc directory, run make with no
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// target there if the PDF file isn't present.)  If not, see
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// <http://www.gnu.org/licenses/> for a copy.
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//
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// License:     GPL, v3, as defined and found on www.gnu.org,
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//              http://www.gnu.org/licenses/gpl.html
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <strings.h>
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#include "zparser.h"
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#include "zopcodes.h"
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typedef ZPARSER::ZIPI ZIPI;     // A Zip Instruction (i.e. uint32)
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#define IMMOP(OP,CND,IMM,A) (((OP&0x0f)<<28)|((A&0x0f)<<24)|((CND&0x07)<<21) \
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                        | (IMM & 0x0fffff))
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#define DBLREGOP(OP,CND,IMM,B,A) (((OP&0x0f)<<28)|((A&0x0f)<<24)        \
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                        |((CND&0x07)<<21)|(1<<20)|((B&0x0f)<<16)         \
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                        | (IMM & 0x0ffff))
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ZIPI    ZPARSER::op_cmp(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0x0, cnd, imm, b, a);
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}
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ZIPI    ZPARSER::op_cmp(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return IMMOP(0x0, cnd, imm, a);
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}
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ZIPI    ZPARSER::op_tst(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0x1, cnd, imm, b, a);
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} ZIPI  ZPARSER::op_tst(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return IMMOP(0x1, cnd, imm, a);
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}
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ZIPI    ZPARSER::op_mov(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        ZIPI    in;
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        in = (0x02 << 28)|((a&0x0f)<<24)|((cnd&0x07)<<21);
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        in |= (a&0x10)<<16;
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        in |= (b&0x0f)<<16;
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        in |= (b&0x10)<<11;
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        in |= imm & 0x07fff;
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        return in;
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}
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ZIPI    ZPARSER::op_ldi(ZIPIMM imm, ZIPREG a) const {
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        ZIPI    in;
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        in = ((0x03)<<28) | ((a&0x0f)<<24) | (imm & ((1<<24)-1));
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        return in;
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}
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ZIPI    ZPARSER::op_trap(ZIPCOND cnd, ZIPIMM imm) const {
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        ZIPI    in;
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        if (cnd != ZIPC_ALWAYS)
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                return op_ldilo(cnd, imm, ZIP_CC);
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        else
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                return op_ldi(imm, ZIP_CC);
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        // in  = ((0x4f)<<24)|((cnd&0x07)<<21)|(1<<20)|((0x0e)<<16);
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        // in |= (imm & 0x0ffff);
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        return in;
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}
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ZIPI    ZPARSER::op_noop(void) const {
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        return 0x4e000000;
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}
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ZIPI    ZPARSER::op_break(void) const {
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        return 0x4e000001;
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}
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ZIPI    ZPARSER::op_ldihi(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        ZIPI    in;
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        in  = ((0x4f)<<24)|((cnd&0x07)<<21)|(1<<20)|((a&0x0f)<<16);
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        in |= (imm & 0x0ffff);
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        return in;
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}
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ZIPI    ZPARSER::op_ldilo(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        ZIPI    in;
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        in  = ((0x4f)<<24)|((cnd&0x07)<<21)|(0<<20)|((a&0x0f)<<16);
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        in |= (imm & 0x0ffff);
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        return in;
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}
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ZIPI    ZPARSER::op_mpyu(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return (0x04<<28)|((a&0x0f)<<24)|((cnd&0x7)<<21)|(0<<20)|((b&0x0f)<<16)|(imm & 0x0ffff);
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} ZIPI  ZPARSER::op_mpyu(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return (0x04<<28)|((a&0x0f)<<24)|((cnd&0x7)<<21)|(0<<20)|((0x0f)<<16)|(imm & 0x0ffff);
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}
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ZIPI    ZPARSER::op_mpys(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return (0x04<<28)|((a&0x0f)<<24)|((cnd&0x7)<<21)|(1<<20)|((b&0x0f)<<16)|(imm & 0x0ffff);
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} ZIPI  ZPARSER::op_mpys(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return (0x04<<28)|((a&0x0f)<<24)|((cnd&0x7)<<21)|(1<<20)|((0x0f)<<16)|(imm & 0x0ffff);
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}
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ZIPI    ZPARSER::op_rol(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0x5, cnd, imm, b, a);
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} ZIPI  ZPARSER::op_rol(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return IMMOP(0x5, cnd, imm, a);
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}
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ZIPI    ZPARSER::op_lod(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0x6, cnd, imm, b, a);
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} ZIPI  ZPARSER::op_lod(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return IMMOP(0x6, cnd, imm, a);
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}
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ZIPI    ZPARSER::op_sto(ZIPCOND cnd, ZIPREG v, ZIPIMM imm, ZIPREG b) const {
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        return DBLREGOP(0x7, cnd, imm, b, v);
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} ZIPI  ZPARSER::op_sto(ZIPCOND cnd, ZIPREG v, ZIPIMM imm) const {
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        return IMMOP(0x7, cnd, imm, v);
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}
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ZIPI    ZPARSER::op_sub(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0x8, cnd, imm, b, a);
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} ZIPI  ZPARSER::op_sub(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        // While it seems like we might do well replacing a subtract immediate
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        // with an add of the negative same, the conditions aren't the same
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        // when doing so.  Hence this is an invalid substitution.
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        // return IMMOP(0xa, cnd, -imm, a); // Do an add of the negative of imm
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        return IMMOP(0x8, cnd, imm, a);
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}
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ZIPI    ZPARSER::op_and(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0x9, cnd, imm, b, a);
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} ZIPI  ZPARSER::op_and(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return IMMOP(0x9, cnd, imm, a);
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}
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ZIPI    ZPARSER::op_add(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0xa, cnd, imm, b, a);
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} ZIPI  ZPARSER::op_add(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return IMMOP(0xa, cnd, imm, a);
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}
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ZIPI    ZPARSER::op_or(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0xb, cnd, imm, b, a);
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} ZIPI  ZPARSER::op_or(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return IMMOP(0xb, cnd, imm, a);
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}
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ZIPI    ZPARSER::op_xor(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0xc, cnd, imm, b, a);
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} ZIPI  ZPARSER::op_xor(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return IMMOP(0xc, cnd, imm, a);
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}
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ZIPI    ZPARSER::op_lsl(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0xd, cnd, imm, b, a);
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} ZIPI  ZPARSER::op_lsl(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return IMMOP(0xd, cnd, imm, a);
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}
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ZIPI    ZPARSER::op_asr(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0xe, cnd, imm, b, a);
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} ZIPI  ZPARSER::op_asr(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return IMMOP(0xe, cnd, imm, a);
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}
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ZIPI    ZPARSER::op_lsr(ZIPCOND cnd, ZIPIMM imm, ZIPREG b, ZIPREG a) const {
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        return DBLREGOP(0xf, cnd, imm, b, a);
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} ZIPI  ZPARSER::op_lsr(ZIPCOND cnd, ZIPIMM imm, ZIPREG a) const {
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        return IMMOP(0xf, cnd, imm, a);
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}
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