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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_03
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as8051.y
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1990-12-02
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40KB
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1,680 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: as8051.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: as8051.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);
*/
/* 8051 structured generation file */
/* 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
/* 0000.0000.0000.0xxx register value */
#define REGVALMASK 0x7
/* 0xxx.xxxx.0000.0000 register and special select bits */
#define REGSEL_ALL 0x7f00
#define REG2NDSHFT 8
#define REGSEL_ACC 0x100
#define REGSEL_AB 0x200
#define REGSEL_C 0x400
#define REGSEL_DPTR 0x800
#define REGSEL_PC 0x1000
#define REGSEL_R01 0x2000
#define REGSEL_R07 0x4000
#define REG2SEL_ACC 0x1
#define REG2SEL_AB 0x2
#define REG2SEL_C 0x4
#define REG2SEL_DPTR 0x8
#define REG2SEL_PC 0x10
#define REG2SEL_R01 0x20
#define REG2SEL_R07 0x40
#define ST_INH 0x1
#define ST_UOP01 0x2
#define ST_UOP02 0x4
#define ST_UOP03 0x8
#define ST_UOP04 0x10
#define ST_UOP05 0x20
#define ST_ALU01 0x1
#define ST_ALU02 0x2
#define ST_ALU02E 0x4
#define ST_ALU03 0x8
#define ST_ALU04 0x10
#define ST_ALU05 0x20
#define ST_ALU06 0x40
#define ST_ALU07 0x80
#define ST_ALU08 0x100
#define ST_ALU09 0x200
#define ST_ALU10 0x400
#define ST_MOV01 0x1
#define ST_MOV02 0x2
#define ST_MOV03 0x4
#define ST_MOV04 0x8
#define ST_MOV05 0x10
#define ST_MOV06 0x20
#define ST_MOV07 0x40
#define ST_MOV08 0x80
#define ST_MOV09 0x100
#define ST_MOV10 0x200
#define ST_MOV11 0x400
#define ST_MOV12 0x800
#define ST_MOV13 0x1000
#define ST_MOV14 0x2000
#define ST_CJNE1 0x1
#define ST_CJNE2 0x2
#define ST_CJNE3 0x4
static char genbdef[] = "[1=];";
static char genwdef[] = "[1=]y"; /* 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> REG
%type <intv> bit
%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_opcode
%token <intv> KOC_aluop
%token <intv> KOC_mov
%token <intv> KOC_cjne
%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 c