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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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vol_300
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335_01
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as2650.y
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1990-12-02
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1,634 lines
%{
/*
HEADER: ;
TITLE: Frankenstein Cross Assemblers;
VERSION: 2.0;
DESCRIPTION: " Reconfigurable Cross-assembler producing Intel (TM)
Hex format object records. ";
KEYWORDS: cross-assemblers, 1805, 2650, 6301, 6502, 6805, 6809,
6811, tms7000, 8048, 8051, 8096, z8, z80;
SYSTEM: UNIX, MS-Dos ;
FILENAME: as2650.y;
WARNINGS: "This software is in the public domain.
Any prior copyright claims are relinquished.
This software is distributed with no warranty whatever.
The author takes no responsibility for the consequences
of its use.
Yacc (or Bison) required to compile." ;
SEE-ALSO: as2650.doc,frasmain.c;
AUTHORS: Mark Zenier;
COMPILERS: Microport Sys V/AT, ATT Yacc, Turbo C V1.5, Bison (CUG disk 285)
(previous versions Xenix, Unisoft 68000 Version 7, Sun 3);
*/
/* 2650 instruction generation file, standard syntax */
/* November 17, 1990 */
/*
description frame work parser description for framework cross
assemblers
history February 2, 1988
September 11, 1990 - merge table definition
September 12, 1990 - short file names
September 14, 1990 - short variable names
September 17, 1990 - use yylex as external
*/
#include <stdio.h>
#include "frasmdat.h"
#include "fragcon.h"
#define yylex lexintercept
/* selectors for register */
/* 0000 0000 0000 xxxx */
#define REGMASK 0xf
#define REG0 0x1
#define REG1 0x2
#define REG2 0x4
#define REG3 0x8
/* selectors for conditions */
/* 0000 0000 xxxx 0000 */
#define CONDMASK 0xf0
#define COND0 0x10
#define COND1 0x20
#define COND2 0x40
#define COND3 0x80
#define PAGEBITS 0x6000
#define ST_INH 0x1
#define ST_EXP 0x2
#define ST_INDIR 0x4
#define ST_REG 0x8
#define ST_REGCOMMA 0x10
#define ST_REGEXP 0x20
#define ST_REGINDIR 0x40
#define ST_COND 0x80
#define ST_CONDEXP 0x100
#define ST_CONDINDIR 0x200
#define ST_BINDEX 0x400
#define ST_BINDIRX 0x800
#define API_ABS 0
#define API_INC 2
#define API_DEC 4
#define API_IND 6
#define API_IABS 8
#define API_IINC 0xa
#define API_IDEC 0xc
#define API_IIND 0xe
#define ST_ABSOLUTE 0x1
#define ST_INDEX 0x2
#define ST_INCINDEX 0x4
#define ST_DECINDEX 0x8
#define ST_AREGINDIR 0x10
#define ST_INDIRX 0x20
#define ST_INCINDIRX 0x40
#define ST_DECINDIRX 0x80
static int regsel[4] = {REG0, REG1, REG2, REG3};
static int condsel[4] = {COND0, COND1, COND2, COND3};
static int prevpage;
static char genbdef[] = "[1=];";
static char genwdef[] = "[1=]x"; /* x for normal, y for byte rev */
char ignosyn[] = "[Xinvalid syntax for instruction";
char ignosel[] = "[Xinvalid operands";
long labelloc;
static int satsub;
int ifstkpt = 0;
int fraifskip = FALSE;
struct symel * endsymbol = SYMNULL;
%}
%union {
int intv;
long longv;
char *strng;
struct symel *symb;
}
%token <intv> REGISTER
%token <intv> CONDITION
%token <intv> KOC_BDEF
%token <intv> KOC_ELSE
%token <intv> KOC_END
%token <intv> KOC_ENDI
%token <intv> KOC_EQU
%token <intv> KOC_IF
%token <intv> KOC_INCLUDE
%token <intv> KOC_ORG
%token <intv> KOC_RESM
%token <intv> KOC_SDEF
%token <intv> KOC_SET
%token <intv> KOC_WDEF
%token <intv> KOC_CHSET
%token <intv> KOC_CHDEF
%token <intv> KOC_CHUSE
%token <intv> KOC_ACON
%token <intv> KOC_opcode
%token <intv> KOC_indexabs
%token <longv> CONSTANT
%token EOL
%token KEOP_AND
%token KEOP_DEFINED
%token KEOP_EQ
%token KEOP_GE
%token KEOP_GT
%token KEOP_HIGH
%token KEOP_LE
%token KEOP_LOW
%token KEOP_LT
%token KEOP_MOD
%token KEOP_MUN
%token KEOP_NE
%token KEOP_NOT
%token KEOP_OR
%token KEOP_SHL
%token KEOP_SHR
%token KEOP_XOR
%token KEOP_locctr
%token <symb> LABEL
%token <strng> STRING
%token <symb> SYMBOL
%token KTK_invalid
%right KEOP_HIGH KEOP_LOW
%left KEOP_OR KEOP_XOR
%left KEOP_AND
%right KEOP_NOT
%nonassoc KEOP_GT KEOP_GE KEOP_LE KEOP_LT KEOP_NE KEOP_EQ
%left '+' '-'
%left '*' '/' KEOP_MOD KEOP_SHL KEOP_SHR
%right KEOP_MUN
%type <intv> expr exprlist stringlist
%start file
%%
file : file allline
| allline
;
allline : line EOL
{
clrexpr();
}
| EOL
| error EOL
{
clrexpr();
yyerrok;
}
;
line : LABEL KOC_END
{
endsymbol = $1;
nextreadact = Nra_end;
}
| KOC_END
{
nextreadact = Nra_end;
}
| KOC_INCLUDE STRING
{
if(nextfstk >= FILESTKDPTH)
{
fraerror("include file nesting limit exceeded");
}
else
{
infilestk[nextfstk].fnm = savestring($2,strlen($2));
if( (infilestk[nextfstk].fpt = fopen($2,"r"))
==(FILE *)NULL )
{
fraerror("cannot open include file");
}
else
{
nextreadact = Nra_new;
}
}
}
| LABEL KOC_EQU expr
{
if($1 -> seg == SSG_UNDEF)
{
pevalexpr(0, $3);
if(evalr[0].seg == SSG_ABS)
{
$1 -> seg = SSG_EQU;
$1 -> value = evalr[0].value;
prtequvalue("C: 0x%lx\n",
evalr[0].value);
}
else
{
fraerror(
"noncomputable expression for EQU");
}
}
else
{
fraerror(
"cannot change symbol value with EQU");
}
}
| LABEL KOC_SET expr
{
if($1 -> seg == SSG_UNDEF
|| $1 -> seg == SSG_SET)
{
pevalexpr(0, $3);
if(evalr[0].seg == SSG_ABS)
{
$1 -> seg = SSG_SET;
$1 -> value = evalr[0].value;
prtequvalue("C: 0x%lx\n",
evalr[0].value);
}
else
{
fraerror(
"noncomputable expression for SET");
}
}
else
{
fraerror(
"cannot change symbol value with SET");
}
}
| KOC_IF expr
{
if((++ifstkpt) < IFSTKDEPTH)
{
pevalexpr(0, $2);
if(evalr[0].seg == SSG_ABS)
{
if(evalr[0].value != 0)
{
elseifstk[ifstkpt] = If_Skip;
endifstk[ifstkpt] = If_Active;
}
else
{
fraifskip = TRUE;
elseifstk[ifstkpt] = If_Active;
endifstk[ifstkpt] = If_Active;
}
}
else
{
fraifskip = TRUE;
elseifstk[ifstkpt] = If_Active;
endifstk[ifstkpt] = If_Active;
}
}
else
{
fraerror("IF stack overflow");
}
}
| KOC_IF
{
if(fraifskip)
{
if((++ifstkpt) < IFSTKDEPTH)
{
elseifstk[ifstkpt] = If_Skip;
endifstk[ifstkpt] = If_Skip;
}
else
{
fraerror("IF stack overflow");
}
}
else
{
yyerror("syntax error");
YYERROR;
}
}
| KOC_ELSE
{
switch(elseifstk[ifstkpt])
{
case If_Active:
fraifskip = FALSE;
break;
case If_Skip:
fraifskip = TRUE;
break;
case If_Err:
fraerror("ELSE with no matching if");
break;
}
}
| KOC_ENDI
{
switch(endifstk[ifstkpt])
{
case If_Active:
fraifskip = FALSE;
ifstkpt--;
break;
case If_Skip:
fraifskip = TRUE;
ifstkpt--;
break;
case If_Err:
fraerror("ENDI with no matching if");
break;
}
}
| LABEL KOC_ORG expr
{
pevalexpr(0, $3);
if(evalr[0].seg == SSG_ABS)
{
locctr = labelloc = evalr[0].value;
if($1 -> seg == SSG_UNDEF)
{
$1 -> seg = SSG_ABS;
$1 -> value = labelloc;
}
else
fraerror(
"multiple definition of label");
prtequvalue("C: 0x%lx\n",
evalr[0].value);
}
else
{
fraerror(
"noncomputable expression for ORG");
}
}
| KOC_ORG expr
{
pevalexpr(0, $2);
if(evalr[0].seg == SSG_ABS)
{
locctr = labelloc = evalr[0].value;
prtequvalue("C: 0x%lx\n",
evalr[0].value);
}
else
{
fraerror(
"noncomputable expression for ORG");
}
}
| LABEL KOC_CHSET
{
if($1 -> seg == SSG_UNDEF)
{
$1 -> seg = SSG_EQU;
if( ($1->value = chtcreate()) <= 0)
{
fraerror( "cannot create character translation table");
}
prtequvalue("C: 0x%lx\n", $1 -> value);
}
else
{
fraerror( "multiple definition of label");
}
}