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/* codescmp.c */
/*****************************************************************************/
/* AS-Portierung */
/* */
/* Codegenerator National SC/MP */
/* */
/* Historie: 17. 2.1996 Grundsteinlegung */
/* 2. 1.1998 ChkPC umgestellt */
/* */
/*****************************************************************************/
#include "stdinc.h"
#include <ctype.h>
#include <string.h>
#include "nls.h"
#include "strutil.h"
#include "chunks.h"
#include "asmdef.h"
#include "asmsub.h"
#include "asmpars.h"
#include "codepseudo.h"
#include "codevars.h"
#define FixedOrderCnt 21
#define ImmOrderCnt 8
#define RegOrderCnt 3
#define MemOrderCnt 8
#define JmpOrderCnt 4
typedef struct
{
char *Name;
Byte Code;
} FixedOrder;
static CPUVar CPUSCMP;
static FixedOrder *FixedOrders;
static FixedOrder *ImmOrders;
static FixedOrder *RegOrders;
static FixedOrder *MemOrders;
static FixedOrder *JmpOrders;
/*---------------------------------------------------------------------------*/
static void AddFixed(char *NName, Byte NCode)
BEGIN
if (InstrZ>=FixedOrderCnt) exit(255);
FixedOrders[InstrZ].Name=NName;
FixedOrders[InstrZ++].Code=NCode;
END
static void AddImm(char *NName, Byte NCode)
BEGIN
if (InstrZ>=ImmOrderCnt) exit(255);
ImmOrders[InstrZ].Name=NName;
ImmOrders[InstrZ++].Code=NCode;
END
static void AddReg(char *NName, Byte NCode)
BEGIN
if (InstrZ>=RegOrderCnt) exit(255);
RegOrders[InstrZ].Name=NName;
RegOrders[InstrZ++].Code=NCode;
END
static void AddMem(char *NName, Byte NCode)
BEGIN
if (InstrZ>=MemOrderCnt) exit(255);
MemOrders[InstrZ].Name=NName;
MemOrders[InstrZ++].Code=NCode;
END
static void AddJmp(char *NName, Byte NCode)
BEGIN
if (InstrZ>=JmpOrderCnt) exit(255);
JmpOrders[InstrZ].Name=NName;
JmpOrders[InstrZ++].Code=NCode;
END
static void InitFields(void)
BEGIN
FixedOrders=(FixedOrder *) malloc(sizeof(FixedOrder)*FixedOrderCnt); InstrZ=0;
AddFixed("LDE" ,0x40); AddFixed("XAE" ,0x01); AddFixed("ANE" ,0x50);
AddFixed("ORE" ,0x58); AddFixed("XRE" ,0x60); AddFixed("DAE" ,0x68);
AddFixed("ADE" ,0x70); AddFixed("CAE" ,0x78); AddFixed("SIO" ,0x19);
AddFixed("SR" ,0x1c); AddFixed("SRL" ,0x1d); AddFixed("RR" ,0x1e);
AddFixed("RRL" ,0x1f); AddFixed("HALT",0x00); AddFixed("CCL" ,0x02);
AddFixed("SCL" ,0x03); AddFixed("DINT",0x04); AddFixed("IEN" ,0x05);
AddFixed("CSA" ,0x06); AddFixed("CAS" ,0x07); AddFixed("NOP" ,0x08);
ImmOrders=(FixedOrder *) malloc(sizeof(FixedOrder)*ImmOrderCnt); InstrZ=0;
AddImm("LDI" ,0xc4); AddImm("ANI" ,0xd4); AddImm("ORI" ,0xdc);
AddImm("XRI" ,0xe4); AddImm("DAI" ,0xec); AddImm("ADI" ,0xf4);
AddImm("CAI" ,0xfc); AddImm("DLY" ,0x8f);
RegOrders=(FixedOrder *) malloc(sizeof(FixedOrder)*RegOrderCnt); InstrZ=0;
AddReg("XPAL",0x30); AddReg("XPAH",0x34); AddReg("XPPC",0x3c);
MemOrders=(FixedOrder *) malloc(sizeof(FixedOrder)*MemOrderCnt); InstrZ=0;
AddMem("LD" ,0xc0); AddMem("ST" ,0xc8); AddMem("AND" ,0xd0);
AddMem("OR" ,0xd8); AddMem("XOR" ,0xe0); AddMem("DAD" ,0xe8);
AddMem("ADD" ,0xf0); AddMem("CAD" ,0xf8);
JmpOrders=(FixedOrder *) malloc(sizeof(FixedOrder)*JmpOrderCnt); InstrZ=0;
AddJmp("JMP" ,0x90); AddJmp("JP" ,0x94); AddJmp("JZ" ,0x98);
AddJmp("JNZ" ,0x9c);
END
static void DeinitFields(void)
BEGIN
free(FixedOrders);
free(ImmOrders);
free(RegOrders);
free(MemOrders);
free(JmpOrders);
END
/*---------------------------------------------------------------------------*/
static Boolean DecodeReg(char *Asc, Byte *Erg)
BEGIN
if ((strlen(Asc)!=2) OR (toupper(*Asc)!='P')) return False;
switch (toupper(Asc[1]))
BEGIN
case 'C': *Erg=0; break;
case '0': case '1': case '2':
case '3': *Erg=Asc[1]-'0'; break;
default: return False;
END
return True;
END
static Boolean DecodeAdr(char *Asc, Boolean MayInc, Byte PCDisp, Byte *Arg)
BEGIN
Integer Disp;
Word PCVal;
Boolean OK;
int l=strlen(Asc);
if ((l>=4) AND (Asc[l-1]==')') AND (Asc[l-4]=='('))
BEGIN
Asc[l-1]='\0';
if (DecodeReg(Asc+l-3,Arg))
BEGIN
Asc[l-4]='\0';
if (*Asc=='@')
BEGIN
if (NOT MayInc)
BEGIN
WrError(1350); return False;
END
strcpy(Asc,Asc+1); *Arg+=4;
END
if (strcasecmp(Asc,"E")==0) BAsmCode[1]=0x80;
else if (*Arg==0)
BEGIN
WrXError(1445,Asc+l-3); return False;
END
else
BEGIN
BAsmCode[1]=EvalIntExpression(Asc,SInt8,&OK);
if (NOT OK) return False;
END
return True;
END
else Asc[l-1]=')';
END
PCVal=(EProgCounter() & 0xf000)+((EProgCounter()+1) & 0xfff);
Disp=EvalIntExpression(Asc,UInt16,&OK)-PCDisp-PCVal;
if (OK)
if ((NOT SymbolQuestionable) AND ((Disp<-128) OR (Disp>127))) WrError(1370);
else
BEGIN
BAsmCode[1]=Disp & 0xff; *Arg=0; return True;
END
return False;
END
/*---------------------------------------------------------------------------*/
static Boolean DecodePseudo(void)
BEGIN
return False;
END
static void ChkPage(void)
BEGIN
if (((EProgCounter()) & 0xf000)!=((EProgCounter()+CodeLen) & 0xf000)) WrError(250);
END
static void MakeCode_SCMP(void)
BEGIN
int z;
Boolean OK;
CodeLen=0; DontPrint=False;
/* zu ignorierendes */
if (Memo("")) return;
/* Pseudoanweisungen */
if (DecodePseudo()) return;
if (DecodeIntelPseudo(False)) return;
/* ohne Argument */
for (z=0; z<FixedOrderCnt; z++)
if (Memo(FixedOrders[z].Name))
BEGIN
if (ArgCnt!=0) WrError(1110);
else
BEGIN
BAsmCode[0]=FixedOrders[z].Code; CodeLen=1;
END
return;
END
/* immediate */
for (z=0; z<ImmOrderCnt; z++)
if (Memo(ImmOrders[z].Name))
BEGIN
if (ArgCnt!=1) WrError(1110);
else
BEGIN
BAsmCode[1]=EvalIntExpression(ArgStr[1],Int8,&OK);
if (OK)
BEGIN
BAsmCode[0]=ImmOrders[z].Code; CodeLen=2; ChkPage();
END
END
return;
END
/* ein Register */
for (z=0; z<RegOrderCnt; z++)
if (Memo(RegOrders[z].Name))
BEGIN
if (ArgCnt!=1) WrError(1110);
else if (NOT DecodeReg(ArgStr[1],BAsmCode+0)) WrXError(1445,ArgStr[1]);
else
BEGIN
BAsmCode[0]+=RegOrders[z].Code; CodeLen=1;
END
return;
END
/* ein Speicheroperand */
for (z=0; z<MemOrderCnt; z++)
if (Memo(MemOrders[z].Name))
BEGIN
if (ArgCnt!=1) WrError(1110);
else if (DecodeAdr(ArgStr[1],True,0,BAsmCode+0))
BEGIN
BAsmCode[0]+=MemOrders[z].Code; CodeLen=2; ChkPage();
END
return;
END
for (z=0; z<JmpOrderCnt; z++)
if (Memo(JmpOrders[z].Name))
BEGIN
if (ArgCnt!=1) WrError(1110);
else if (DecodeAdr(ArgStr[1],False,1,BAsmCode+0))
BEGIN
BAsmCode[0]+=JmpOrders[z].Code; CodeLen=2; ChkPage();
END
return;
END
if ((Memo("ILD")) OR (Memo("DLD")))
BEGIN
if (ArgCnt!=1) WrError(1110);
else if (DecodeAdr(ArgStr[1],False,0,BAsmCode+0))
BEGIN
BAsmCode[0]+=0xa8+(Ord(Memo("DLD")) << 4); CodeLen=2; ChkPage();
END
return;
END
WrXError(1200,OpPart);
END
static Boolean IsDef_SCMP(void)
BEGIN
return False;
END
static void SwitchFrom_SCMP(void)
BEGIN
DeinitFields();
END
static void SwitchTo_SCMP(void)
BEGIN
TurnWords=False; ConstMode=ConstModeC; SetIsOccupied=False;
PCSymbol="$"; HeaderID=0x6e; NOPCode=0x08;
DivideChars=","; HasAttrs=False;
ValidSegs=1<<SegCode;
Grans[SegCode]=1; ListGrans[SegCode]=1; SegInits[SegCode]=0;
SegLimits[SegCode] = 0xffff;
MakeCode=MakeCode_SCMP; IsDef=IsDef_SCMP;
SwitchFrom=SwitchFrom_SCMP; InitFields();
END
void codescmp_init(void)
BEGIN
CPUSCMP=AddCPU("SC/MP",SwitchTo_SCMP);
END
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