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asl/codest6.c

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/* codest6.c */
/*****************************************************************************/
/* AS-Portierung */
/* */
/* Codegenerator ST6-Familie */
/* */
/* Historie: 14.11.1996 Grundsteinlegung */
/* 2. 1.1998 ChkPC ersetzt */
/* */
/*****************************************************************************/
#include "stdinc.h"
#include <string.h>
#include "strutil.h"
#include "bpemu.h"
#include "asmdef.h"
#include "asmsub.h"
#include "asmpars.h"
#include "codepseudo.h"
#include "codevars.h"
typedef struct
{
char *Name;
Byte Code;
} FixedOrder;
typedef struct
{
char *Name;
Word Code;
} AccOrder;
#define FixedOrderCnt 5
#define RelOrderCnt 4
#define ALUOrderCnt 4
#define AccOrderCnt 3
#define ModNone (-1)
#define ModAcc 0
#define MModAcc (1 << ModAcc)
#define ModDir 1
#define MModDir (1 << ModDir)
#define ModInd 2
#define MModInd (1 << ModInd)
static Byte AdrMode;
static ShortInt AdrType;
static Byte AdrVal;
static LongInt WinAssume;
static SimpProc SaveInitProc;
static CPUVar CPUST6210,CPUST6215,CPUST6220,CPUST6225;
static FixedOrder *FixedOrders;
static FixedOrder *RelOrders;
static FixedOrder *ALUOrders;
static AccOrder *AccOrders;
/*---------------------------------------------------------------------------------*/
static void AddFixed(char *NName, Byte NCode)
BEGIN
if (InstrZ>=FixedOrderCnt) exit(255);
FixedOrders[InstrZ].Name=NName;
FixedOrders[InstrZ++].Code=NCode;
END
static void AddRel(char *NName, Byte NCode)
BEGIN
if (InstrZ>=RelOrderCnt) exit(255);
RelOrders[InstrZ].Name=NName;
RelOrders[InstrZ++].Code=NCode;
END
static void AddALU(char *NName, Byte NCode)
BEGIN
if (InstrZ>=ALUOrderCnt) exit(255);
ALUOrders[InstrZ].Name=NName;
ALUOrders[InstrZ++].Code=NCode;
END
static void AddAcc(char *NName, Word NCode)
BEGIN
if (InstrZ>=AccOrderCnt) exit(255);
AccOrders[InstrZ].Name=NName;
AccOrders[InstrZ++].Code=NCode;
END
static void InitFields(void)
BEGIN
FixedOrders=(FixedOrder *) malloc(sizeof(FixedOrder)*FixedOrderCnt); InstrZ=0;
AddFixed("NOP" , 0x04);
AddFixed("RET" , 0xcd);
AddFixed("RETI", 0x4d);
AddFixed("STOP", 0x6d);
AddFixed("WAIT", 0xed);
RelOrders=(FixedOrder *) malloc(sizeof(FixedOrder)*RelOrderCnt); InstrZ=0;
AddRel("JRZ" , 0x04);
AddRel("JRNZ", 0x00);
AddRel("JRC" , 0x06);
AddRel("JRNC", 0x02);
ALUOrders=(FixedOrder *) malloc(sizeof(FixedOrder)*ALUOrderCnt); InstrZ=0;
AddALU("ADD" , 0x47);
AddALU("AND" , 0xa7);
AddALU("CP" , 0x27);
AddALU("SUB" , 0xc7);
AccOrders=(AccOrder *) malloc(sizeof(AccOrder)*AccOrderCnt); InstrZ=0;
AddAcc("COM", 0x002d);
AddAcc("RLC", 0x00ad);
AddAcc("SLA", 0xff5f);
END
static void DeinitFields(void)
BEGIN
free(FixedOrders);
free(RelOrders);
free(ALUOrders);
free(AccOrders);
END
/*---------------------------------------------------------------------------------*/
static void ResetAdr(void)
BEGIN
AdrType=ModNone; AdrCnt=0;
END
static void ChkAdr(Byte Mask)
BEGIN
if ((AdrType!=ModNone) AND ((Mask AND (1 << AdrType))==0))
BEGIN
ResetAdr(); WrError(1350);
END
END
static void DecodeAdr(char *Asc, Byte Mask)
BEGIN
#define RegCnt 5
static char *RegNames[RegCnt+1]={"A","V","W","X","Y"};
static Byte RegCodes[RegCnt+1]={0xff,0x82,0x83,0x80,0x81};
Boolean OK;
int z;
Integer AdrInt;
ResetAdr();
if ((strcasecmp(Asc,"A")==0) AND ((Mask & MModAcc)!=0))
BEGIN
AdrType=ModAcc; ChkAdr(Mask); return;
END
for (z=0; z<RegCnt; z++)
if (strcasecmp(Asc,RegNames[z])==0)
BEGIN
AdrType=ModDir; AdrCnt=1; AdrVal=RegCodes[z];
ChkAdr(Mask); return;
END
if (strcasecmp(Asc,"(X)")==0)
BEGIN
AdrType=ModInd; AdrMode=0; ChkAdr(Mask); return;
END
if (strcasecmp(Asc,"(Y)")==0)
BEGIN
AdrType=ModInd; AdrMode=1; ChkAdr(Mask); return;
END
AdrInt=EvalIntExpression(Asc,UInt16,&OK);
if (OK)
if ((TypeFlag & (1 << SegCode))!=0)
BEGIN
AdrType=ModDir; AdrVal=(AdrInt & 0x3f)+0x40; AdrCnt=1;
if (NOT FirstPassUnknown)
if (WinAssume!=(AdrInt >> 6)) WrError(110);
END
else
BEGIN
if (FirstPassUnknown) AdrInt=Lo(AdrInt);
if (AdrInt>0xff) WrError(1320);
else
BEGIN
AdrType=ModDir; AdrVal=AdrInt; ChkAdr(Mask); return;
END
END
ChkAdr(Mask);
END
static Boolean DecodePseudo(void)
BEGIN
#define ASSUME62Count 1
static ASSUMERec ASSUME62s[ASSUME62Count]=
{{"ROMBASE", &WinAssume, 0, 0x3f, 0x40}};
Boolean OK,Flag;
int z;
String s;
if (Memo("SFR"))
BEGIN
CodeEquate(SegData,0,0xff);
return True;
END
if ((Memo("ASCII")) OR (Memo("ASCIZ")))
BEGIN
if (ArgCnt==0) WrError(1110);
else
BEGIN
z=1; Flag=Memo("ASCIZ");
do
BEGIN
EvalStringExpression(ArgStr[z],&OK,s);
if (OK)
BEGIN
TranslateString(s);
if (CodeLen+strlen(s)+Ord(Flag)>MaxCodeLen)
BEGIN
WrError(1920); OK=False;
END
else
BEGIN
memcpy(BAsmCode+CodeLen,s,strlen(s)); CodeLen+=strlen(s);
if (Flag) BAsmCode[CodeLen++]=0;
END
END
z++;
END
while ((OK) AND (z<=ArgCnt));
if (NOT OK) CodeLen=0;
END
return True;
END
if (Memo("BYTE"))
BEGIN
strmaxcpy(OpPart,"BYT",255); DecodeMotoPseudo(False);
return True;
END
if (Memo("WORD"))
BEGIN
strmaxcpy(OpPart,"ADR",255); DecodeMotoPseudo(False);
return True;
END
if (Memo("BLOCK"))
BEGIN
strmaxcpy(OpPart,"DFS",255); DecodeMotoPseudo(False);
return True;
END
if (Memo("ASSUME"))
BEGIN
CodeASSUME(ASSUME62s,ASSUME62Count);
return True;
END
return False;
END
static Boolean IsReg(Byte Adr)
BEGIN
return ((Adr & 0xfc)==0x80);
END
static Byte MirrBit(Byte inp)
BEGIN
return (((inp & 1) << 2)+(inp & 2)+((inp & 4) >> 2));
END
static void MakeCode_ST62(void)
BEGIN
Integer AdrInt;
int z;
Boolean OK;
CodeLen=0; DontPrint=False;
/* zu ignorierendes */
if (Memo("")) return;
/* Pseudoanweisungen */
if (DecodePseudo()) return;
/* ohne Argument */
for (z=0; z<FixedOrderCnt; z++)
if (Memo(FixedOrders[z].Name))
BEGIN
if (ArgCnt!=0) WrError(1110);
else
BEGIN
CodeLen=1; BAsmCode[0]=FixedOrders[z].Code;
END
return;
END
/* Datentransfer */
if (Memo("LD"))
BEGIN
if (ArgCnt!=2) WrError(1110);
else
BEGIN
DecodeAdr(ArgStr[1],MModAcc+MModDir+MModInd);
switch (AdrType)
BEGIN
case ModAcc:
DecodeAdr(ArgStr[2],MModDir+MModInd);
switch (AdrType)
BEGIN
case ModDir:
if (IsReg(AdrVal))
BEGIN
CodeLen=1; BAsmCode[0]=0x35+((AdrVal & 3) << 6);
END
else
BEGIN
CodeLen=2; BAsmCode[0]=0x1f; BAsmCode[1]=AdrVal;
END
break;
case ModInd:
CodeLen=1; BAsmCode[0]=0x07+(AdrMode << 3);
break;
END
break;
case ModDir:
DecodeAdr(ArgStr[2],MModAcc);
if (AdrType!=ModNone)
if (IsReg(AdrVal))
BEGIN
CodeLen=1; BAsmCode[0]=0x3d+((AdrVal & 3) << 6);
END
else
BEGIN
CodeLen=2; BAsmCode[0]=0x9f; BAsmCode[1]=AdrVal;
END
break;
case ModInd:
DecodeAdr(ArgStr[2],MModAcc);
if (AdrType!=ModNone)
BEGIN
CodeLen=1; BAsmCode[0]=0x87+(AdrMode << 3);
END
break;
END
END
return;
END
if (Memo("LDI"))
BEGIN
if (ArgCnt!=2) WrError(1110);
else
BEGIN
AdrInt=EvalIntExpression(ArgStr[2],Int8,&OK);
if (OK)
BEGIN
DecodeAdr(ArgStr[1],MModAcc+MModDir);
switch (AdrType)
BEGIN
case ModAcc:
CodeLen=2; BAsmCode[0]=0x17; BAsmCode[1]=Lo(AdrInt);
break;
case ModDir:
CodeLen=3; BAsmCode[0]=0x0d; BAsmCode[1]=AdrVal;
BAsmCode[2]=Lo(AdrInt);
break;
END
END
END
return;
END
/* Spruenge */
for (z=0; z<RelOrderCnt; z++)
if (Memo(RelOrders[z].Name))
BEGIN
if (ArgCnt!=1) WrError(1110);
else
BEGIN
AdrInt=EvalIntExpression(ArgStr[1],UInt16,&OK)-(EProgCounter()+1);
if (OK)
if ((NOT SymbolQuestionable) AND ((AdrInt<-16) OR (AdrInt>15))) WrError(1370);
else
BEGIN
CodeLen=1;
BAsmCode[0]=RelOrders[z].Code+((AdrInt << 3) & 0xf8);
END
END
return;
END
if ((Memo("JP")) OR (Memo("CALL")))
BEGIN
if (ArgCnt!=1) WrError(1110);
else
BEGIN
AdrInt=EvalIntExpression(ArgStr[1],Int16,&OK);
if (OK)
if ((AdrInt<0) OR (AdrInt>0xfff)) WrError(1925);
else
BEGIN
CodeLen=2;
BAsmCode[0]=0x01+(Ord(Memo("JP")) << 3)+((AdrInt & 0x00f) << 4);
BAsmCode[1]=AdrInt >> 4;
END
END
return;
END
/* Arithmetik */
for (z=0; z<ALUOrderCnt; z++)
if (strncmp(ALUOrders[z].Name,OpPart,strlen(ALUOrders[z].Name))==0)
switch (OpPart[strlen(ALUOrders[z].Name)])
BEGIN
case '\0':
if (ArgCnt!=2) WrError(1110);
else
BEGIN
DecodeAdr(ArgStr[1],MModAcc);
if (AdrType!=ModNone)
BEGIN
DecodeAdr(ArgStr[2],MModDir+MModInd);
switch (AdrType)
BEGIN
case ModDir:
CodeLen=2; BAsmCode[0]=ALUOrders[z].Code+0x18;
BAsmCode[1]=AdrVal;
break;
case ModInd:
CodeLen=1; BAsmCode[0]=ALUOrders[z].Code+(AdrMode << 3);
break;
END
END
END
return;
case 'I':
if (ArgCnt!=2) WrError(1110);
else
BEGIN
DecodeAdr(ArgStr[1],MModAcc);
if (AdrType!=ModNone)
BEGIN
BAsmCode[1]=EvalIntExpression(ArgStr[2],Int8,&OK);
if (OK)
BEGIN
CodeLen=2; BAsmCode[0]=ALUOrders[z].Code+0x10;
END
END
END
return;
END
if (Memo("CLR"))
BEGIN
if (ArgCnt!=1) WrError(1110);
else
BEGIN
DecodeAdr(ArgStr[1],MModAcc+MModDir);
switch (AdrType)
BEGIN
case ModAcc:
CodeLen=2; BAsmCode[0]=0xdf; BAsmCode[1]=0xff;
break;
case ModDir:
CodeLen=3; BAsmCode[0]=0x0d; BAsmCode[1]=AdrVal; BAsmCode[2]=0;
break;
END
END
return;
END
for (z=0; z<AccOrderCnt; z++)
if (Memo(AccOrders[z].Name))
BEGIN
if (ArgCnt!=1) WrError(1110);
else
BEGIN
DecodeAdr(ArgStr[1],MModAcc);
if (AdrType!=ModNone)
BEGIN
OK=(Hi(AccOrders[z].Code)!=0);
CodeLen=1+Ord(OK);
BAsmCode[0]=Lo(AccOrders[z].Code);
if (OK) BAsmCode[1]=Hi(AccOrders[z].Code);
END
END
return;
END
if ((Memo("INC")) OR (Memo("DEC")))
BEGIN
if (ArgCnt!=1) WrError(1110);
else
BEGIN
DecodeAdr(ArgStr[1],MModDir+MModInd);
switch (AdrType)
BEGIN
case ModDir:
if (IsReg(AdrVal))
BEGIN
CodeLen=1; BAsmCode[0]=0x15+((AdrVal & 3) << 6);
if (Memo("DEC")) BAsmCode[0]+=8;
END
else
BEGIN
CodeLen=2; BAsmCode[0]=0x7f+(Ord(Memo("DEC")) << 7);
BAsmCode[1]=AdrVal;
END
break;
case ModInd:
CodeLen=1;
BAsmCode[0]=0x67+(AdrMode << 3)+(Ord(Memo("DEC")) << 7);
break;
END
END
return;
END
/* Bitbefehle */
if ((Memo("SET")) OR (Memo("RES")))
BEGIN
if (ArgCnt!=2) WrError(1110);
else
BEGIN
BAsmCode[0]=MirrBit(EvalIntExpression(ArgStr[1],UInt3,&OK));
if (OK)
BEGIN
DecodeAdr(ArgStr[2],MModDir);
if (AdrType!=ModNone)
BEGIN
CodeLen=2;
BAsmCode[0]=(BAsmCode[0] << 5)+(Ord(Memo("SET")) << 4)+0x0b;
BAsmCode[1]=AdrVal;
END
END
END
return;
END
if ((Memo("JRR")) OR (Memo("JRS")))
BEGIN
if (ArgCnt!=3) WrError(1110);
else
BEGIN
BAsmCode[0]=MirrBit(EvalIntExpression(ArgStr[1],UInt3,&OK));
if (OK)
BEGIN
BAsmCode[0]=(BAsmCode[0] << 5)+3+(Ord(Memo("JRS")) << 4);
DecodeAdr(ArgStr[2],MModDir);
if (AdrType!=ModNone)
BEGIN
BAsmCode[1]=AdrVal;
AdrInt=EvalIntExpression(ArgStr[3],UInt16,&OK)-(EProgCounter()+3);
if (OK)
if ((NOT SymbolQuestionable) AND ((AdrInt>127) OR (AdrInt<-128))) WrError(1370);
else
BEGIN
CodeLen=3; BAsmCode[2]=Lo(AdrInt);
END
END
END
END
return;
END
WrXError(1200,OpPart);
END
static void InitCode_ST62(void)
BEGIN
SaveInitProc();
WinAssume=0x40;
END
static Boolean IsDef_ST62(void)
BEGIN
return (Memo("SFR"));
END
static void SwitchFrom_ST62(void)
BEGIN
DeinitFields();
END
static void SwitchTo_ST62(void)
BEGIN
TurnWords=False; ConstMode=ConstModeIntel; SetIsOccupied=True;
PCSymbol="PC"; HeaderID=0x78; NOPCode=0x04;
DivideChars=","; HasAttrs=False;
ValidSegs=(1<<SegCode)+(1<<SegData);
Grans[SegCode]=1; ListGrans[SegCode]=1; SegInits[SegCode]=0;
SegLimits[SegCode] = (MomCPU < CPUST6220) ? 0xfff : 0x7ff;
Grans[SegData]=1; ListGrans[SegData]=1; SegInits[SegData]=0;
SegLimits[SegData] = 0xff;
MakeCode=MakeCode_ST62; IsDef=IsDef_ST62;
SwitchFrom=SwitchFrom_ST62; InitFields();
END
void codest6_init(void)
BEGIN
CPUST6210=AddCPU("ST6210",SwitchTo_ST62);
CPUST6215=AddCPU("ST6215",SwitchTo_ST62);
CPUST6220=AddCPU("ST6220",SwitchTo_ST62);
CPUST6225=AddCPU("ST6225",SwitchTo_ST62);
SaveInitProc=InitPassProc; InitPassProc=InitCode_ST62;
END
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