URL https://opencores.org/ocsvn/zipcpu/zipcpu/trunk

Subversion Repositories zipcpu

[/] [zipcpu/] [trunk/] [sw/] [zasm/] [zasm.y] - Blame information for rev 17

Go to most recent revision | Details | Compare with Previous | View Log


/*******************************************************************************
**
** Filename:    zasm.y
**
** Project:     Zip CPU -- a small, lightweight, RISC CPU core
**
** Purpose:     The parser for the Zip Assembler.  This is actually not just
**              the parser, but the main program as well.
**
** Creator:     Dan Gisselquist, Ph.D.
**              Gisselquist Tecnology, LLC
**
********************************************************************************
**
** Copyright (C) 2015, Gisselquist Technology, LLC
**
** This program is free software (firmware): you can redistribute it and/or
** modify it under the terms of  the GNU General Public License as published
** by the Free Software Foundation, either version 3 of the License, or (at
** your option) any later version.
**
** This program is distributed in the hope that it will be useful, but WITHOUT
** ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
** FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
** for more details.
**
** You should have received a copy of the GNU General Public License along
** with this program.  (It's in the $(ROOT)/doc directory, run make with no
** target there if the PDF file isn't present.)  If not, see
**  for a copy.
**
** License:     GPL, v3, as defined and found on www.gnu.org,
**              http://www.gnu.org/licenses/gpl.html
**
**
*******************************************************************************/
 
%{
 #include 
 #include 
 #include "asmdata.h"
 
  extern "C" int yylex(void);
  extern "C" int yyparse(void);
  // extern "C" FILE *yyin;
  void yyerror(const char *);
  unsigned int global_parser_pc;
  char *master_input_filename = NULL;
  extern int yylineno;
  char  *linecp = NULL; // A copy of the input line
%}
 
%token COMMA EQU PLUS MINUS TIMES HERE DOLLAR COLON
%token BOOLEANOR BITWISEOR BOOLEANAND BITWISEAND BITWISEXOR DOT
%token WORD FILL
%token LOADOP STOROP LDIOP
%token BAREOP BRANCHOP COND DUALOP IDENTIFIER INT LDHLOP REG SINGLOP
 
%union {
        ZPARSER::ZIPREG         u_reg;
        ZPARSER::ZIPCOND        u_cond;
        int                     u_ival;
        LEXOPCODE               u_op;
        char                    *u_id;
        ASMLINE                 *u_ln;
        AST                     *u_ast;
}
 
%type                   REG
%type           COND opcond
%type           INT
%type                   IDENTIFIER
%type                   BAREOP SINGLOP DUALOP BRANCHOP LDHLOP
%type                   unlabeledline instruction wordlist fillist opb
%type                   bareop singlop dualop loadop storop line
%type                   expr value multident
 
%% /* The grammar follows */
 
input:
  %empty
| input line { if ($2) {objcode += $2; global_parser_pc += $2->nlines(); if ($2->isdefined()) delete $2; } }
;
 
line:
   '\n' { $$ = NULL; }
| unlabeledline '\n' { $$ = $1; }
| multident COLON unlabeledline '\n' {
        if ($1->m_node_type == 'I') {
                if (((AST_IDENTIFIER*)$1)->m_id[0] == 'L')
                        stb_define(((AST_IDENTIFIER *)$1)->m_id, new AST_NUMBER(global_parser_pc));
                else
                        gbl_define(((AST_IDENTIFIER *)$1)->m_id, new AST_NUMBER(global_parser_pc));
                delete $1;
                }
        $$ = $3;
        }
| multident COLON '\n' {
        if ($1->m_node_type == 'I') {
                if (((AST_IDENTIFIER*)$1)->m_id[0] == 'L')
                        stb_define(((AST_IDENTIFIER *)$1)->m_id, new AST_NUMBER(global_parser_pc));
                else
                        gbl_define(((AST_IDENTIFIER *)$1)->m_id, new AST_NUMBER(global_parser_pc));
                delete $1;
        }
        $$ = new VLINE();
        }
| multident EQU expr '\n' {
        if ($1->m_node_type == 'I') {
                stb_define(((AST_IDENTIFIER *)$1)->m_id, $3);
                delete $1;
        }
        $$ = new VLINE();
        }
;
 
unlabeledline:
  instruction   { $$ = $1; }
| WORD wordlist { $$ = $2; }
| FILL fillist { $$ = $2; }
;
 
wordlist:
  expr  {
        if ($1->isdefined())
                $$ = new DLINE($1->eval());
        else {
                $$ = new VLINE();
                yyerror("ERROR: word list undefined");
        }}
| wordlist COMMA expr {
        if ($3->isdefined()) {
                LLINE   *ln;
                if ($1->m_state == 'L') {
                        ln = ((LLINE *)$1);
                } else {
                        ln = new LLINE();
                        ln->addline($1);
                } ln->addline(new DLINE($3->eval()));
                $$ = ln;
        } else {
                $$ = new VLINE();
                yyerror("ERROR: word list undefined\n");
        }}
;
 
fillist:
  expr COMMA expr {
                if (($1->isdefined())&&($3->isdefined())) {
                        int     ntimes = $1->eval(),
                                val = $3->eval();
                        LLINE   *ln = new LLINE();
                        for(int i=0; i
                                ln->addline(new DLINE(val));
                        $$ = ln;
                } else {
                        yyerror("Fill list undefined\n");
                        $$ = new VLINE();
                }
        }
;
 
instruction:
  dualop  opb COMMA REG {
                $$ = $1;
                ((TLINE*)$1)->m_imm = ((TLINE*)$2)->m_imm; ((TLINE*)$2)->m_imm = NULL;
                ((TLINE*)$1)->m_opb = ((TLINE*)$2)->m_opb;
                ((TLINE*)$1)->m_opa = $4;
                if ($1->isdefined()) {
                        $$ = ((TLINE*)$1)->eval();
                        delete $1;
                        delete $2;
                }
        }
| dualop  opb COMMA multident {
                char    buf[256];
                sprintf(buf, "%s is not a register", ((AST_IDENTIFIER *)$4)->m_id.c_str());
                yyerror(buf);
                $$ = new VLINE();
                delete $1;
                delete $2;
                delete $4;
        }
| singlop opb   {
                $$ = $1;
                ((TLINE*)$1)->m_imm = ((TLINE*)$2)->m_imm; ((TLINE*)$2)->m_imm = NULL;
                ((TLINE*)$1)->m_opb = ((TLINE*)$2)->m_opb;
                if ($1->isdefined()) {
                        $$ = ((TLINE *)$1)->eval();
                        delete $1;
                }
        }
| bareop        { $$ = $1; }
| LDHLOP  opcond expr COMMA REG {
                TLINE *tln = new TLINE;
                tln->m_opcode = $1;
                tln->m_cond   = $2;
                tln->m_imm    = $3;
                tln->m_opa    = $5;
 
                if (tln->isdefined()) {
                        $$ = tln->eval();
                        delete tln;
                } else
                        $$ = tln;
        }
| LDHLOP  opcond expr COMMA multident {
                char    buf[256];
                sprintf(buf, "%s is not a register", ((AST_IDENTIFIER *)$5)->m_id.c_str());
                yyerror(buf);
                $$ = new VLINE();
                delete $3;
                delete $5;
        }
| LDIOP          expr COMMA REG {
                TLINE *tln = new TLINE;
                tln->m_opcode = OP_LDI;
                tln->m_cond   = ZPARSER::ZIPC_ALWAYS;
                tln->m_imm    = $2;
                tln->m_opa    = $4;
 
                if (tln->isdefined()) {
                        $$ = tln->eval();
                        delete tln;
                } else
                        $$ = tln;
        }
| LDIOP  expr COMMA multident {
                char    buf[256];
                sprintf(buf, "%s is not a register", ((AST_IDENTIFIER *)$4)->m_id.c_str());
                yyerror(buf);
                $$ = new VLINE();
                delete $2;
                delete $4;
        }
| BRANCHOP  expr        {
                TLINE *tln = new TLINE;
                tln->m_opcode = $1;
                tln->m_imm    = $2;
 
                if (tln->isdefined()) {
                        $$ = tln->eval();
                        delete tln;
                } else
                        $$ = tln;
        }
| loadop opb COMMA REG {
                TLINE *tln = new TLINE;
                ((TLINE*)$2)->m_opcode = OP_LOD;
                ((TLINE*)$2)->m_cond   = ((TLINE*)$1)->m_cond;
                ((TLINE*)$2)->m_opa    = $4;
 
                delete $1;
 
                if (((TLINE *)$2)->isdefined()) {
                        $$ = ((TLINE *)$2)->eval();
                        delete $2;
                } else
                        $$ = $2;
        }
| loadop opb COMMA multident {
                char    buf[256];
                sprintf(buf, "%s is not a register", ((AST_IDENTIFIER *)$4)->m_id.c_str());
                yyerror(buf);
                $$ = new VLINE();
                delete $1;
                delete $2;
                delete $4;
        }
| storop REG COMMA opb {
                TLINE *tln = new TLINE;
                tln->m_opcode = OP_STO;
                tln->m_cond   = ((TLINE*)$1)->m_cond;
                tln->m_imm    = ((TLINE*)$4)->m_imm;
                tln->m_opb    = ((TLINE*)$4)->m_opb;
                tln->m_opa    = $2;
 
                delete $1;
 
                if (tln->isdefined()) {
                        $$ = tln->eval();
                        delete tln;
                } else
                        $$ = tln;
        }
| storop multident COMMA opb {
                char    buf[256];
                sprintf(buf, "%s is not a register", ((AST_IDENTIFIER *)$2)->m_id.c_str());
                yyerror(buf);
                $$ = new VLINE();
                delete $1;
                delete $2;
                delete $4;
        }
;
 
dualop: DUALOP  opcond {
        TLINE *tln = new TLINE();
        tln->m_opcode = $1;
        tln->m_cond   = $2;
        $$ = tln;
        }
;
 
singlop: SINGLOP opcond {
        TLINE *tln = new TLINE();
        tln->m_opcode = $1;
        tln->m_cond   = $2;
        $$ = tln;
        }
;
 
storop: STOROP opcond {
        TLINE *tln = new TLINE();
        tln->m_opcode = OP_STO;
        tln->m_cond   = $2;
        $$ = tln;
        }
;
 
loadop: LOADOP opcond {
        TLINE *tln = new TLINE();
        tln->m_opcode = OP_LOD;
        tln->m_cond   = $2;
        $$ = tln;
        }
;
 
bareop: BAREOP  opcond {
        TLINE *tln = new TLINE();
        tln->m_opcode = $1;
        tln->m_cond   = $2;
        $$ = tln;
        }
;
 
opcond:
        COND    { $$ = $1; }
|       %empty  { $$ = ZPARSER::ZIPC_ALWAYS; }
;
 
opb:
        expr    {
                TLINE *tln = new TLINE();
                tln->m_imm = $1;
                $$ = tln;
        }
|       expr PLUS REG {
                TLINE *tln = new TLINE();
                tln->m_imm = $1;
                tln->m_opb = $3;
                $$ = tln;
        }
|       expr '(' REG ')' {
                TLINE *tln = new TLINE();
                tln->m_imm = $1;
                tln->m_opb = $3;
                $$ = tln;
        }
|       '(' REG ')' {
                TLINE *tln = new TLINE();
                tln->m_imm = new AST_NUMBER(0);
                tln->m_opb = $2;
                $$ = tln;
        }
|       REG {
                TLINE *tln = new TLINE();
                tln->m_imm = new AST_NUMBER(0);
                tln->m_opb = $1;
                $$ = tln;
        }
;
 
expr:
        value                   { $$ = $1; }
|       MINUS value             { $$ = new AST_BRANCH('-',new AST_NUMBER(0), $2); }
|       expr PLUS value         { $$ = new AST_BRANCH('+',$1,$3); }
|       expr MINUS value        { $$ = new AST_BRANCH('-',$1,$3); }
|       expr TIMES value        { $$ = new AST_BRANCH('*',$1,$3); }
|       expr BOOLEANOR value    { $$ = new AST_BRANCH('o',$1,$3); }
|       expr BITWISEOR value    { $$ = new AST_BRANCH('|',$1,$3); }
|       expr BOOLEANAND value   { $$ = new AST_BRANCH('a',$1,$3); }
|       expr BITWISEAND value   { $$ = new AST_BRANCH('&',$1,$3); }
|       expr BITWISEXOR value   { $$ = new AST_BRANCH('^',$1,$3); }
|       '(' expr ')'            { $$ = $2; }
;
        /* expr OR  (|) value */
        /* expr XOR (^) value */
        /* expr AND (&) value */
 
value:
        INT     { $$ = new AST_NUMBER($1); }
| multident     { $$ = $1; }
| HERE          { $$ = new AST_NUMBER(global_parser_pc); }
;
 
multident:
        IDENTIFIER              { $$ = new AST_IDENTIFIER($1); delete $1; }
| multident DOT IDENTIFIER      { $$ = new AST_IDENTIFIER($1,$3); delete $3; }
;
%%
 
#include 
#include 
#include 
#include 
#include 
 
OBJFILE objcode;
 
void    yyerror(const char *str) {
        fprintf(stderr, "%s:%d: ERROR: %s\n", master_input_filename, yylineno, str);
        if (linecp) fprintf(stderr, "Offending line was: %s\n", linecp);
}
 
FILE    *run_preprocessor(const char *path = NULL, const char *zname = NULL) {
        int     pipefd[2];
        int     pid;
 
        if (pipe(pipefd)!=0) {
                fprintf(stderr, "PIPE FAILED!\n");
                perror("O/S Err:");
                exit(-2);
        } if ((zname)&&(access(zname, R_OK)!=0)) { // if !zname, then use stdin
                fprintf(stderr, "Cannot open %s\n", zname);
                perror("O/S Err:");
                exit(-2);
        }
 
 
        if (0 == (pid = fork())) {
                int     fdin, fdout;
 
                // Child process -- run the preprocessor
 
                // Close the reader: we write only
                close(pipefd[0]);
 
                // Adjust stdout to write to our pipe instead of anywhere else
                fdout = pipefd[1];
                close(STDOUT_FILENO);
                dup2(fdout, STDOUT_FILENO);
 
                char    *zpp_path;
                if (path != NULL) {
                        zpp_path = new char[strlen(path+1+strlen("/zpp"))];
                        strcpy(zpp_path, path);
                        strcat(zpp_path, "/zpp");
                } else zpp_path = strdup("zpp");
 
                // This call should never return
                //      We have to pass the name here, rather than an open file,
                // since zpp needs to mark for us what file it is in at all
                // times.
                if (zname)
                        execlp(zpp_path, "zpp", zname, NULL);
                else
                        execlp(zpp_path, "zpp", NULL);
 
                fprintf(stderr, "Could not start pre-processor!\n");
                perror("O/S Err:");
 
                exit(-5);
        }
 
        close(pipefd[1]);
        return fdopen(pipefd[0], "r");
}
 
int     main(int argc, char **argv) {
        int     skp = 0;
        const char      *zout_fname = NULL;
        char            *path_to_zasm = NULL;
        bool    preprocess_only = false;
        master_input_filename = NULL;
 
        // Find what directory zasm is in, so that we can find zpp when
        // necessary.
        path_to_zasm = NULL;
        if (strchr(argv[0], '/')) {
                path_to_zasm = strdup(argv[0]);
                char *ptr = strrchr(path_to_zasm,'/');
                *ptr = '\0';
        }
 
        skp=1;
        for(int argn=0; argn+skp
                if (argv[argn+skp][0] == '-') {
                        if (argv[argn+skp][1] == 'o') {
                                if (zout_fname)
                                        free((void *)zout_fname);
                                zout_fname = strdup(argv[argn+skp+1]);
                                skp++;
                        } else if (argv[argn+skp][1] == 'E')
                                preprocess_only = true;
 
                        skp++;
                } argv[argn] = argv[argn+skp];
        } argc -= skp;
 
        if (preprocess_only) {
                objcode.open("/dev/null");
        } else {
                if (!zout_fname)
                        zout_fname = "z.out";
 
                objcode.open(zout_fname);
        }
 
        master_input_filename = NULL;
 
        if (argc > 0) {
                for(int argn=0; argn
                        extern  FILE    *yyin;
                        extern  void    yyrestart(FILE *);
                        FILE    *tst;
 
                        create_new_context();
                        if (master_input_filename)
                                free(master_input_filename);
                        master_input_filename = strdup(argv[argn]);
                        if (preprocess_only) {
                                FILE    *fp = run_preprocessor(path_to_zasm, master_input_filename);
                                int     ch;
                                while(EOF != (ch = fgetc(fp)))
                                        fputc(ch, stdout);
                        } else {
                                yyrestart(run_preprocessor(path_to_zasm, master_input_filename));
                                yylineno = 1;
                                yyparse();
                        }
                }
        } else { // Run from Stdin
                extern  FILE    *yyin;
                extern  void    yyrestart(FILE *);
 
                create_new_context();
                master_input_filename = strdup("(stdin)");
                if (preprocess_only) {
                        int     ch;
                                FILE    *fp = run_preprocessor(path_to_zasm, master_input_filename);
                        while(EOF != (ch = fgetc(fp)))
                                fputc(ch, stdout);
                } else {
                        yyin = run_preprocessor(NULL);
                        yyrestart(yyin);
                        yyparse();
                }
        }
 
        if (!objcode.reduce())
                fprintf(stderr, "Not all symbols defined!\n");
}
 
 

Browse

Tools

Subversion Repositories zipcpu

[/] [zipcpu/] [trunk/] [sw/] [zasm/] [zasm.y] - Blame information for rev 17

Line No.	Rev	Author	Line
1	13	dgisselq	`/*******************************************************************************`
2			`**`
3			`** Filename: zasm.y`
4			`**`
5			`** Project: Zip CPU -- a small, lightweight, RISC CPU core`
6			`**`
7			`** Purpose: The parser for the Zip Assembler. This is actually not just`
8			`** the parser, but the main program as well.`
9			`**`
10			`** Creator: Dan Gisselquist, Ph.D.`
11			`** Gisselquist Tecnology, LLC`
12			`**`
13			`********************************************************************************`
14			`**`
15			`** Copyright (C) 2015, Gisselquist Technology, LLC`
16			`**`
17			`** This program is free software (firmware): you can redistribute it and/or`
18			`** modify it under the terms of the GNU General Public License as published`
19			`** by the Free Software Foundation, either version 3 of the License, or (at`
20			`** your option) any later version.`
21			`**`
22			`** This program is distributed in the hope that it will be useful, but WITHOUT`
23			`** ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or`
24			`** FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License`
25			`** for more details.`
26			`**`
27			`** You should have received a copy of the GNU General Public License along`
28			`** with this program. (It's in the $(ROOT)/doc directory, run make with no`
29			`** target there if the PDF file isn't present.) If not, see`
30			`** for a copy.`
31			`**`
32			`** License: GPL, v3, as defined and found on www.gnu.org,`
33			`** http://www.gnu.org/licenses/gpl.html`
34			`**`
35			`**`
36			`*******************************************************************************/`
37
38			`%{`
39			`#include`
40			`#include`
41			`#include "asmdata.h"`
42
43			`extern "C" int yylex(void);`
44			`extern "C" int yyparse(void);`
45			`// extern "C" FILE *yyin;`
46			`void yyerror(const char *);`
47			`unsigned int global_parser_pc;`
48			`char *master_input_filename = NULL;`
49			`extern int yylineno;`
50			`char *linecp = NULL; // A copy of the input line`
51			`%}`
52
53			`%token COMMA EQU PLUS MINUS TIMES HERE DOLLAR COLON`
54			`%token BOOLEANOR BITWISEOR BOOLEANAND BITWISEAND BITWISEXOR DOT`
55			`%token WORD FILL`
56			`%token LOADOP STOROP LDIOP`
57			`%token BAREOP BRANCHOP COND DUALOP IDENTIFIER INT LDHLOP REG SINGLOP`
58
59			`%union {`
60			`ZPARSER::ZIPREG u_reg;`
61			`ZPARSER::ZIPCOND u_cond;`
62			`int u_ival;`
63			`LEXOPCODE u_op;`
64			`char *u_id;`
65			`ASMLINE *u_ln;`
66			`AST *u_ast;`
67			`}`
68
69			`%type REG`
70			`%type COND opcond`
71			`%type INT`
72			`%type IDENTIFIER`
73			`%type BAREOP SINGLOP DUALOP BRANCHOP LDHLOP`
74			`%type unlabeledline instruction wordlist fillist opb`
75			`%type bareop singlop dualop loadop storop line`
76			`%type expr value multident`
77
78			`%% /* The grammar follows */`
79
80			`input:`
81			`%empty`
82			`\| input line { if ($2) {objcode += $2; global_parser_pc += $2->nlines(); if ($2->isdefined()) delete $2; } }`
83			`;`
84
85			`line:`
86			`'\n' { $$ = NULL; }`
87			`\| unlabeledline '\n' { $$ = $1; }`
88			`\| multident COLON unlabeledline '\n' {`
89			`if ($1->m_node_type == 'I') {`
90			`if (((AST_IDENTIFIER*)$1)->m_id[0] == 'L')`
91			`stb_define(((AST_IDENTIFIER *)$1)->m_id, new AST_NUMBER(global_parser_pc));`
92			`else`
93			`gbl_define(((AST_IDENTIFIER *)$1)->m_id, new AST_NUMBER(global_parser_pc));`
94			`delete $1;`
95			`}`
96			`$$ = $3;`
97			`}`
98			`\| multident COLON '\n' {`
99			`if ($1->m_node_type == 'I') {`
100			`if (((AST_IDENTIFIER*)$1)->m_id[0] == 'L')`
101			`stb_define(((AST_IDENTIFIER *)$1)->m_id, new AST_NUMBER(global_parser_pc));`
102			`else`
103			`gbl_define(((AST_IDENTIFIER *)$1)->m_id, new AST_NUMBER(global_parser_pc));`
104			`delete $1;`
105			`}`
106			`$$ = new VLINE();`
107			`}`
108			`\| multident EQU expr '\n' {`
109			`if ($1->m_node_type == 'I') {`
110			`stb_define(((AST_IDENTIFIER *)$1)->m_id, $3);`
111			`delete $1;`
112			`}`
113			`$$ = new VLINE();`
114			`}`
115			`;`
116
117			`unlabeledline:`
118			`instruction { $$ = $1; }`
119			`\| WORD wordlist { $$ = $2; }`
120			`\| FILL fillist { $$ = $2; }`
121			`;`
122
123			`wordlist:`
124			`expr {`
125			`if ($1->isdefined())`
126			`$$ = new DLINE($1->eval());`
127			`else {`
128			`$$ = new VLINE();`
129			`yyerror("ERROR: word list undefined");`
130			`}}`
131	16	dgisselq	`\| wordlist COMMA expr {`
132			`if ($3->isdefined()) {`
133			`LLINE *ln;`
134			`if ($1->m_state == 'L') {`
135			`ln = ((LLINE *)$1);`
136			`} else {`
137			`ln = new LLINE();`
138			`ln->addline($1);`
139			`} ln->addline(new DLINE($3->eval()));`
140			`$$ = ln;`
141			`} else {`
142	13	dgisselq	`$$ = new VLINE();`
143			`yyerror("ERROR: word list undefined\n");`
144			`}}`
145			`;`
146
147			`fillist:`
148			`expr COMMA expr {`
149			`if (($1->isdefined())&&($3->isdefined())) {`
150			`int ntimes = $1->eval(),`
151			`val = $3->eval();`
152			`LLINE *ln = new LLINE();`
153			`for(int i=0; i`
154			`ln->addline(new DLINE(val));`
155			`$$ = ln;`
156			`} else {`
157			`yyerror("Fill list undefined\n");`
158			`$$ = new VLINE();`
159			`}`
160			`}`
161			`;`
162
163			`instruction:`
164			`dualop opb COMMA REG {`
165			`$$ = $1;`
166			`((TLINE)$1)->m_imm = ((TLINE)$2)->m_imm; ((TLINE*)$2)->m_imm = NULL;`
167			`((TLINE)$1)->m_opb = ((TLINE)$2)->m_opb;`
168			`((TLINE*)$1)->m_opa = $4;`
169			`if ($1->isdefined()) {`
170			`$$ = ((TLINE*)$1)->eval();`
171			`delete $1;`
172			`delete $2;`
173			`}`
174			`}`
175			`\| dualop opb COMMA multident {`
176			`char buf[256];`
177			`sprintf(buf, "%s is not a register", ((AST_IDENTIFIER *)$4)->m_id.c_str());`
178			`yyerror(buf);`
179			`$$ = new VLINE();`
180			`delete $1;`
181			`delete $2;`
182			`delete $4;`
183			`}`
184			`\| singlop opb {`
185			`$$ = $1;`
186			`((TLINE)$1)->m_imm = ((TLINE)$2)->m_imm; ((TLINE*)$2)->m_imm = NULL;`
187			`((TLINE)$1)->m_opb = ((TLINE)$2)->m_opb;`
188			`if ($1->isdefined()) {`
189			`$$ = ((TLINE *)$1)->eval();`
190			`delete $1;`
191			`}`
192			`}`
193			`\| bareop { $$ = $1; }`
194			`\| LDHLOP opcond expr COMMA REG {`
195			`TLINE *tln = new TLINE;`
196			`tln->m_opcode = $1;`
197			`tln->m_cond = $2;`
198			`tln->m_imm = $3;`
199			`tln->m_opa = $5;`
200
201			`if (tln->isdefined()) {`
202			`$$ = tln->eval();`
203			`delete tln;`
204			`} else`
205			`$$ = tln;`
206			`}`
207			`\| LDHLOP opcond expr COMMA multident {`
208			`char buf[256];`
209			`sprintf(buf, "%s is not a register", ((AST_IDENTIFIER *)$5)->m_id.c_str());`
210			`yyerror(buf);`
211			`$$ = new VLINE();`
212			`delete $3;`
213			`delete $5;`
214			`}`
215			`\| LDIOP expr COMMA REG {`
216			`TLINE *tln = new TLINE;`
217			`tln->m_opcode = OP_LDI;`
218			`tln->m_cond = ZPARSER::ZIPC_ALWAYS;`
219			`tln->m_imm = $2;`
220			`tln->m_opa = $4;`
221
222			`if (tln->isdefined()) {`
223			`$$ = tln->eval();`
224			`delete tln;`
225			`} else`
226			`$$ = tln;`
227			`}`
228			`\| LDIOP expr COMMA multident {`
229			`char buf[256];`
230			`sprintf(buf, "%s is not a register", ((AST_IDENTIFIER *)$4)->m_id.c_str());`
231			`yyerror(buf);`
232			`$$ = new VLINE();`
233			`delete $2;`
234			`delete $4;`
235			`}`
236			`\| BRANCHOP expr {`
237			`TLINE *tln = new TLINE;`
238			`tln->m_opcode = $1;`
239			`tln->m_imm = $2;`
240
241			`if (tln->isdefined()) {`
242			`$$ = tln->eval();`
243			`delete tln;`
244			`} else`
245			`$$ = tln;`
246			`}`
247			`\| loadop opb COMMA REG {`
248			`TLINE *tln = new TLINE;`
249			`((TLINE*)$2)->m_opcode = OP_LOD;`
250			`((TLINE)$2)->m_cond = ((TLINE)$1)->m_cond;`
251			`((TLINE*)$2)->m_opa = $4;`
252
253			`delete $1;`
254
255			`if (((TLINE *)$2)->isdefined()) {`
256			`$$ = ((TLINE *)$2)->eval();`
257			`delete $2;`
258			`} else`
259			`$$ = $2;`
260			`}`
261			`\| loadop opb COMMA multident {`
262			`char buf[256];`
263			`sprintf(buf, "%s is not a register", ((AST_IDENTIFIER *)$4)->m_id.c_str());`
264			`yyerror(buf);`
265			`$$ = new VLINE();`
266			`delete $1;`
267			`delete $2;`
268			`delete $4;`
269			`}`
270			`\| storop REG COMMA opb {`
271			`TLINE *tln = new TLINE;`
272			`tln->m_opcode = OP_STO;`
273			`tln->m_cond = ((TLINE*)$1)->m_cond;`
274			`tln->m_imm = ((TLINE*)$4)->m_imm;`
275			`tln->m_opb = ((TLINE*)$4)->m_opb;`
276			`tln->m_opa = $2;`
277
278			`delete $1;`
279
280			`if (tln->isdefined()) {`
281			`$$ = tln->eval();`
282			`delete tln;`
283			`} else`
284			`$$ = tln;`
285			`}`
286			`\| storop multident COMMA opb {`
287			`char buf[256];`
288			`sprintf(buf, "%s is not a register", ((AST_IDENTIFIER *)$2)->m_id.c_str());`
289			`yyerror(buf);`
290			`$$ = new VLINE();`
291			`delete $1;`
292			`delete $2;`
293			`delete $4;`
294			`}`
295			`;`
296
297			`dualop: DUALOP opcond {`
298			`TLINE *tln = new TLINE();`
299			`tln->m_opcode = $1;`
300			`tln->m_cond = $2;`
301			`$$ = tln;`
302			`}`
303			`;`
304
305			`singlop: SINGLOP opcond {`
306			`TLINE *tln = new TLINE();`
307			`tln->m_opcode = $1;`
308			`tln->m_cond = $2;`
309			`$$ = tln;`
310			`}`
311			`;`
312
313			`storop: STOROP opcond {`
314			`TLINE *tln = new TLINE();`
315			`tln->m_opcode = OP_STO;`
316			`tln->m_cond = $2;`
317			`$$ = tln;`
318			`}`
319			`;`
320
321			`loadop: LOADOP opcond {`
322			`TLINE *tln = new TLINE();`
323			`tln->m_opcode = OP_LOD;`
324			`tln->m_cond = $2;`
325			`$$ = tln;`
326			`}`
327			`;`
328
329			`bareop: BAREOP opcond {`
330			`TLINE *tln = new TLINE();`
331			`tln->m_opcode = $1;`
332			`tln->m_cond = $2;`
333			`$$ = tln;`
334			`}`
335			`;`
336
337			`opcond:`
338			`COND { $$ = $1; }`
339			`\| %empty { $$ = ZPARSER::ZIPC_ALWAYS; }`
340			`;`
341
342			`opb:`
343			`expr {`
344			`TLINE *tln = new TLINE();`
345			`tln->m_imm = $1;`
346			`$$ = tln;`
347			`}`
348			`\| expr PLUS REG {`
349			`TLINE *tln = new TLINE();`
350			`tln->m_imm = $1;`
351			`tln->m_opb = $3;`
352			`$$ = tln;`
353			`}`
354			`\| expr '(' REG ')' {`
355			`TLINE *tln = new TLINE();`
356			`tln->m_imm = $1;`
357			`tln->m_opb = $3;`
358			`$$ = tln;`
359			`}`
360			`\| '(' REG ')' {`
361			`TLINE *tln = new TLINE();`
362			`tln->m_imm = new AST_NUMBER(0);`
363			`tln->m_opb = $2;`
364			`$$ = tln;`
365			`}`
366			`\| REG {`
367			`TLINE *tln = new TLINE();`
368			`tln->m_imm = new AST_NUMBER(0);`
369			`tln->m_opb = $1;`
370			`$$ = tln;`
371			`}`
372			`;`
373
374			`expr:`
375			`value { $$ = $1; }`
376			`\| MINUS value { $$ = new AST_BRANCH('-',new AST_NUMBER(0), $2); }`
377			`\| expr PLUS value { $$ = new AST_BRANCH('+',$1,$3); }`
378			`\| expr MINUS value { $$ = new AST_BRANCH('-',$1,$3); }`
379			`\| expr TIMES value { $$ = new AST_BRANCH('*',$1,$3); }`
380			`\| expr BOOLEANOR value { $$ = new AST_BRANCH('o',$1,$3); }`
381			`\| expr BITWISEOR value { $$ = new AST_BRANCH('\|',$1,$3); }`
382			`\| expr BOOLEANAND value { $$ = new AST_BRANCH('a',$1,$3); }`
383			`\| expr BITWISEAND value { $$ = new AST_BRANCH('&',$1,$3); }`
384			`\| expr BITWISEXOR value { $$ = new AST_BRANCH('^',$1,$3); }`
385			`\| '(' expr ')' { $$ = $2; }`
386			`;`
387			`/* expr OR (\|) value */`
388			`/* expr XOR (^) value */`
389			`/* expr AND (&) value */`
390
391			`value:`
392			`INT { $$ = new AST_NUMBER($1); }`
393			`\| multident { $$ = $1; }`
394			`\| HERE { $$ = new AST_NUMBER(global_parser_pc); }`
395			`;`
396
397			`multident:`
398			`IDENTIFIER { $$ = new AST_IDENTIFIER($1); delete $1; }`
399			`\| multident DOT IDENTIFIER { $$ = new AST_IDENTIFIER($1,$3); delete $3; }`
400			`;`
401			`%%`
402
403			`#include`
404			`#include`
405			`#include`
406			`#include`
407			`#include`
408
409			`OBJFILE objcode;`
410
411			`void yyerror(const char *str) {`
412			`fprintf(stderr, "%s:%d: ERROR: %s\n", master_input_filename, yylineno, str);`
413			`if (linecp) fprintf(stderr, "Offending line was: %s\n", linecp);`
414			`}`
415
416	16	dgisselq	`FILE run_preprocessor(const char path = NULL, const char *zname = NULL) {`
417	13	dgisselq	`int pipefd[2];`
418			`int pid;`
419
420			`if (pipe(pipefd)!=0) {`
421			`fprintf(stderr, "PIPE FAILED!\n");`
422			`perror("O/S Err:");`
423			`exit(-2);`
424			`} if ((zname)&&(access(zname, R_OK)!=0)) { // if !zname, then use stdin`
425			`fprintf(stderr, "Cannot open %s\n", zname);`
426			`perror("O/S Err:");`
427			`exit(-2);`
428			`}`
429
430
431			`if (0 == (pid = fork())) {`
432			`int fdin, fdout;`
433
434			`// Child process -- run the preprocessor`
435
436	16	dgisselq	`// Close the reader: we write only`
437	13	dgisselq	`close(pipefd[0]);`
438
439	16	dgisselq	`// Adjust stdout to write to our pipe instead of anywhere else`
440	13	dgisselq	`fdout = pipefd[1];`
441			`close(STDOUT_FILENO);`
442			`dup2(fdout, STDOUT_FILENO);`
443
444	16	dgisselq	`char *zpp_path;`
445			`if (path != NULL) {`
446			`zpp_path = new char[strlen(path+1+strlen("/zpp"))];`
447			`strcpy(zpp_path, path);`
448			`strcat(zpp_path, "/zpp");`
449			`} else zpp_path = strdup("zpp");`
450
451	13	dgisselq	`// This call should never return`
452	16	dgisselq	`// We have to pass the name here, rather than an open file,`
453			`// since zpp needs to mark for us what file it is in at all`
454			`// times.`
455			`if (zname)`
456			`execlp(zpp_path, "zpp", zname, NULL);`
457			`else`
458			`execlp(zpp_path, "zpp", NULL);`
459	13	dgisselq
460			`fprintf(stderr, "Could not start pre-processor!\n");`
461			`perror("O/S Err:");`
462
463			`exit(-5);`
464			`}`
465
466			`close(pipefd[1]);`
467			`return fdopen(pipefd[0], "r");`
468			`}`
469
470			`int main(int argc, char **argv) {`
471			`int skp = 0;`
472			`const char *zout_fname = NULL;`
473	16	dgisselq	`char *path_to_zasm = NULL;`
474			`bool preprocess_only = false;`
475	13	dgisselq	`master_input_filename = NULL;`
476
477	16	dgisselq	`// Find what directory zasm is in, so that we can find zpp when`
478			`// necessary.`
479			`path_to_zasm = NULL;`
480			`if (strchr(argv[0], '/')) {`
481			`path_to_zasm = strdup(argv[0]);`
482			`char *ptr = strrchr(path_to_zasm,'/');`
483			`*ptr = '\0';`
484			`}`
485
486	13	dgisselq	`skp=1;`
487			`for(int argn=0; argn+skp`
488			`if (argv[argn+skp][0] == '-') {`
489			`if (argv[argn+skp][1] == 'o') {`
490			`if (zout_fname)`
491			`free((void *)zout_fname);`
492			`zout_fname = strdup(argv[argn+skp+1]);`
493			`skp++;`
494	16	dgisselq	`} else if (argv[argn+skp][1] == 'E')`
495			`preprocess_only = true;`
496	13	dgisselq
497			`skp++;`
498			`} argv[argn] = argv[argn+skp];`
499			`} argc -= skp;`
500
501	16	dgisselq	`if (preprocess_only) {`
502			`objcode.open("/dev/null");`
503			`} else {`
504			`if (!zout_fname)`
505			`zout_fname = "z.out";`
506	13	dgisselq
507	16	dgisselq	`objcode.open(zout_fname);`
508			`}`
509	13	dgisselq
510			`master_input_filename = NULL;`
511
512			`if (argc > 0) {`
513			`for(int argn=0; argn`
514			`extern FILE *yyin;`
515			`extern void yyrestart(FILE *);`
516			`FILE *tst;`
517
518			`create_new_context();`
519			`if (master_input_filename)`
520			`free(master_input_filename);`
521			`master_input_filename = strdup(argv[argn]);`
522	16	dgisselq	`if (preprocess_only) {`
523			`FILE *fp = run_preprocessor(path_to_zasm, master_input_filename);`
524			`int ch;`
525			`while(EOF != (ch = fgetc(fp)))`
526			`fputc(ch, stdout);`
527			`} else {`
528			`yyrestart(run_preprocessor(path_to_zasm, master_input_filename));`
529			`yylineno = 1;`
530			`yyparse();`
531			`}`
532	13	dgisselq	`}`
533			`} else { // Run from Stdin`
534			`extern FILE *yyin;`
535			`extern void yyrestart(FILE *);`
536
537			`create_new_context();`
538			`master_input_filename = strdup("(stdin)");`
539	16	dgisselq	`if (preprocess_only) {`
540			`int ch;`
541			`FILE *fp = run_preprocessor(path_to_zasm, master_input_filename);`
542			`while(EOF != (ch = fgetc(fp)))`
543			`fputc(ch, stdout);`
544			`} else {`
545			`yyin = run_preprocessor(NULL);`
546			`yyrestart(yyin);`
547			`yyparse();`
548			`}`
549	13	dgisselq	`}`
550
551			`if (!objcode.reduce())`
552			`fprintf(stderr, "Not all symbols defined!\n");`
553			`}`
554
555