Subversion Repositories pentevo

/* codemic8.c */

/*****************************************************************************/

/* SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only                     */

/*                                                                           */

/* AS-Portierung                                                             */

/*                                                                           */

/* Codegenerator LatticeMico8                                                */

/*                                                                           */

/*****************************************************************************/

#include "stdinc.h"

#include <stdio.h>

#include <string.h>

#include <ctype.h>

#include "nls.h"

#include "strutil.h"

#include "bpemu.h"

#include "asmdef.h"

#include "asmsub.h"

#include "asmpars.h"

#include "asmitree.h"

#include "asmallg.h"

#include "intpseudo.h"

#include "codevars.h"

#include "headids.h"

#include "errmsg.h"

#include "codepseudo.h"

#include "codemic8.h"

/* define as needed by address space */

#define CodeAddrInt UInt12

#define DataAddrInt UInt5

typedef struct

{

  LongWord Code;

} FixedOrder;

typedef struct

{

  LongWord Code;

  Boolean MayImm;

} ALUOrder;

typedef struct

{

  LongWord Code;

  Byte Space;

} MemOrder;

static FixedOrder *FixedOrders, *ShortBranchOrders, *RegOrders, *LongBranchOrders;

static MemOrder *MemOrders;

static ALUOrder *ALUOrders;

static CPUVar CPUMico8_05, CPUMico8_V3, CPUMico8_V31;

/*--------------------------------------------------------------------------

 * Address Expression Parsing

 *--------------------------------------------------------------------------*/

/*!------------------------------------------------------------------------

 * \fn     IsWRegCore(const char *pArg, LongWord *pValue)

 * \brief  check whether argument is a CPU register

 * \param  pArg argument to check

 * \param  pValue register number if it is a register

 * \return True if it is a register

 * ------------------------------------------------------------------------ */

static Boolean IsWRegCore(const char *pArg, LongWord *pValue)

{

  Boolean OK;

  if ((strlen(pArg) < 2) || (as_toupper(*pArg) != 'R'))

    return False;

  *pValue = ConstLongInt(pArg + 1, &OK, 10);

  if (!OK)

    return False;

  return (*pValue < 32);

}

/*!------------------------------------------------------------------------

 * \fn     DissectReg_Mico8(char *pDest, size_t DestSize, tRegInt Value, tSymbolSize InpSize)

 * \brief  dissect register symbols - MICO8 variant

 * \param  pDest destination buffer

 * \param  DestSize destination buffer size

 * \param  Value numeric register value

 * \param  InpSize register size

 * ------------------------------------------------------------------------ */

static void DissectReg_Mico8(char *pDest, size_t DestSize, tRegInt Value, tSymbolSize InpSize)

{

  switch (InpSize)

  {

    case eSymbolSize8Bit:

      as_snprintf(pDest, DestSize, "R%u", (unsigned)Value);

      break;

    default:

      as_snprintf(pDest, DestSize, "%d-%u", (int)InpSize, (unsigned)Value);

  }

}

/*!------------------------------------------------------------------------

 * \fn     IsWReg(const tStrComp *pArg, LongWord *pValue, Boolean MustBeReg)

 * \brief  check whether argument is a CPU register or register alias

 * \param  pArg argument to check

 * \param  pValue register number if it is a register

 * \param  MustBeReg expecting register as arg?

 * \return register parse result

 * ------------------------------------------------------------------------ */

static tRegEvalResult IsWReg(const tStrComp *pArg, LongWord *pValue, Boolean MustBeReg)

{

  tRegDescr RegDescr;

  tEvalResult EvalResult;

  tRegEvalResult RegEvalResult;

  if (IsWRegCore(pArg->str.p_str, pValue))

    return eIsReg;

  RegEvalResult = EvalStrRegExpressionAsOperand(pArg, &RegDescr, &EvalResult, eSymbolSize8Bit, MustBeReg);

  *pValue = RegDescr.Reg;

  return RegEvalResult;

}

/*--------------------------------------------------------------------------

 * Code Handlers

 *--------------------------------------------------------------------------*/

static void DecodePort(Word Index)

{

  UNUSED(Index);

  CodeEquate(SegIO, 0, SegLimits[SegIO]);

}

static void DecodeFixed(Word Index)

{

  FixedOrder *pOrder = FixedOrders + Index;

  if (ChkArgCnt(0, 0))

  {

    DAsmCode[0] = pOrder->Code;

    CodeLen = 1;

  }

}

static void DecodeALU(Word Index)

{

  ALUOrder *pOrder = ALUOrders + Index;

  LongWord Src, DReg;

  if (ChkArgCnt(2, 2)

   && IsWReg(&ArgStr[1], &DReg, True))

    switch (IsWReg(&ArgStr[2], &Src, True))

    {

      case eIsReg:

        DAsmCode[0] = pOrder->Code | (DReg << 8) | (Src << 3);

        CodeLen = 1;

        break;

      case eIsNoReg:

        if (!pOrder->MayImm) WrStrErrorPos(ErrNum_InvAddrMode, &ArgStr[2]);

        else

        {

          Boolean OK;

          Src = EvalStrIntExpression(&ArgStr[2], Int8, &OK);

          if (OK)

          {

            DAsmCode[0] = pOrder->Code | (1 << 13) | (DReg << 8) | (Src & 0xff);

           CodeLen = 1;

          }

        }

        break;

      default:

        break;

    }

}

static void DecodeALUI(Word Index)

{

  ALUOrder *pOrder = ALUOrders + Index;

  LongWord Src, DReg;

  Boolean OK;

  if (ChkArgCnt(2, 2)

   && IsWReg(&ArgStr[1], &DReg, True))

  {

    Src = EvalStrIntExpression(&ArgStr[2], Int8, &OK);

    if (OK)

    {

      DAsmCode[0] = pOrder->Code | (1 << 13) | (DReg << 8) | (Src & 0xff);

      CodeLen = 1;

    }

  }

}

static void DecodeShortBranch(Word Index)

{

  FixedOrder *pOrder = ShortBranchOrders + Index;

  LongInt Dest;

  Boolean OK;

  tSymbolFlags Flags;

  if (ChkArgCnt(1, 1))

  {

    Dest = EvalStrIntExpressionWithFlags(&ArgStr[1], CodeAddrInt, &OK, &Flags);

    if (OK)

    {

      Dest -= EProgCounter();

      if (((Dest < -512) || (Dest > 511)) && !mSymbolQuestionable(Flags)) WrError(ErrNum_JmpDistTooBig);

      else

      {

        DAsmCode[0] = pOrder->Code | (Dest & 0x3ff);

        CodeLen = 1;

      }

    }

  }

}

static void DecodeLongBranch(Word Index)

{

  FixedOrder *pOrder = LongBranchOrders + Index;

  LongInt Dest;

  Boolean OK;

  tSymbolFlags Flags;

  if (ChkArgCnt(1, 1))

  {

    Dest = EvalStrIntExpressionWithFlags(&ArgStr[1], CodeAddrInt, &OK, &Flags);

    if (OK)

    {

      Dest -= EProgCounter();

      if (((Dest < -2048) || (Dest > 2047)) && !mSymbolQuestionable(Flags)) WrError(ErrNum_JmpDistTooBig);

      else

      {

        DAsmCode[0] = pOrder->Code | (Dest & 0xfff);

        CodeLen = 1;

      }

    }

  }

}

static void DecodeMem(Word Index)

{

  MemOrder *pOrder = MemOrders + Index;

  LongWord DReg, Src;

  if (ChkArgCnt(2, 2)

   && IsWReg(&ArgStr[1], &DReg, True))

    switch (IsWReg(&ArgStr[2], &Src, False))

    {

      case eIsReg:

        DAsmCode[0] = pOrder->Code | (DReg << 8) | ((Src & 0x1f) << 3) | 2;

        CodeLen = 1;

        break;

      case eIsNoReg:

      {

        tEvalResult EvalResult;

        Src = EvalStrIntExpressionWithResult(&ArgStr[2], DataAddrInt, &EvalResult);

        if (EvalResult.OK)

        {

          ChkSpace(pOrder->Space, EvalResult.AddrSpaceMask);

          DAsmCode[0] = pOrder->Code | (DReg << 8) | ((Src & 0x1f) << 3);

          CodeLen = 1;

        }

        break;

      }

      default:

        break;

    }

}

static void DecodeMemI(Word Index)

{

  MemOrder *pOrder = MemOrders + Index;

  LongWord DReg, SReg;

  if (ChkArgCnt(2, 2)

   && IsWReg(&ArgStr[1], &DReg, True)

   && IsWReg(&ArgStr[2], &SReg, True))

  {

    DAsmCode[0] = pOrder->Code | (DReg << 8) | (SReg << 3) | 2;

    CodeLen = 1;

  }

}

static void DecodeReg(Word Index)

{

  FixedOrder *pOrder = RegOrders + Index;

  LongWord Reg = 0;

  if (!ChkArgCnt(1, 1));

  else if (IsWReg(&ArgStr[1], &Reg, True))

  {

    DAsmCode[0] = pOrder->Code | (Reg << 8);

    CodeLen = 1;

  }

}

/*--------------------------------------------------------------------------

 * Instruction Table Handling

 *--------------------------------------------------------------------------*/

static void AddFixed(const char *NName, LongWord NCode)

{

  order_array_rsv_end(FixedOrders, FixedOrder);

  FixedOrders[InstrZ].Code = NCode;

  AddInstTable(InstTable, NName, InstrZ++, DecodeFixed);

}

static void AddALU(const char *NName, const char *NImmName, LongWord NCode)

{

  order_array_rsv_end(ALUOrders, ALUOrder);

  ALUOrders[InstrZ].Code = NCode;

  AddInstTable(InstTable, NName, InstrZ, DecodeALU);

  ALUOrders[InstrZ].MayImm = NImmName != NULL;

  if (ALUOrders[InstrZ].MayImm)

    AddInstTable(InstTable, NImmName, InstrZ, DecodeALUI);

  InstrZ++;

}

static void AddShortBranch(const char *NName, LongWord NCode)

{

  order_array_rsv_end(ShortBranchOrders, FixedOrder);

  ShortBranchOrders[InstrZ].Code = NCode;

  AddInstTable(InstTable, NName, InstrZ++, DecodeShortBranch);

}

static void AddLongBranch(const char *NName, LongWord NCode)

{

  order_array_rsv_end(LongBranchOrders, FixedOrder);

  LongBranchOrders[InstrZ].Code = NCode;

  AddInstTable(InstTable, NName, InstrZ++, DecodeLongBranch);

}

static void AddMem(const char *NName, const char *NImmName, LongWord NCode, Byte NSpace)

{

  order_array_rsv_end(MemOrders, MemOrder);

  MemOrders[InstrZ].Code = NCode;

  MemOrders[InstrZ].Space = NSpace;

  AddInstTable(InstTable, NName, InstrZ, DecodeMem);

  AddInstTable(InstTable, NImmName, InstrZ, DecodeMemI);

  InstrZ++;

}

static void AddReg(const char *NName, LongWord NCode)

{

  order_array_rsv_end(RegOrders, FixedOrder);

  RegOrders[InstrZ].Code = NCode;

  AddInstTable(InstTable, NName, InstrZ++, DecodeReg);

}

static void InitFields(void)

{

  InstTable = CreateInstTable(97);

  InstrZ = 0;

  AddFixed("CLRC"  , 0x2c000);

  AddFixed("SETC"  , 0x2c001);

  AddFixed("CLRZ"  , 0x2c002);

  AddFixed("SETZ"  , 0x2c003);

  AddFixed("CLRI"  , 0x2c004);

  AddFixed("SETI"  , 0x2c005);

  if (MomCPU == CPUMico8_05)

  {

    AddFixed("RET"   , 0x3a000);

    AddFixed("IRET"  , 0x3a001);

  }

  else if (MomCPU == CPUMico8_V3)

  {

    AddFixed("RET"   , 0x38000);

    AddFixed("IRET"  , 0x39000);

  }

  else if (MomCPU == CPUMico8_V31)

  {

    AddFixed("RET"   , 0x39000);

    AddFixed("IRET"  , 0x3a000);

  }

  AddFixed("NOP"   , 0x10000);

  InstrZ = 0;

  AddALU("ADD"    , "ADDI"  ,   2UL << 14);

  AddALU("ADDC"   , "ADDIC" ,   3UL << 14);

  AddALU("SUB"    , "SUBI"  ,   0UL << 14);

  AddALU("SUBC"   , "SUBIC" ,   1UL << 14);

  AddALU("MOV"    , "MOVI"  ,   4UL << 14);

  AddALU("AND"    , "ANDI"  ,   5UL << 14);

  AddALU("OR"     , "ORI"   ,   6UL << 14);

  AddALU("XOR"    , "XORI"  ,   7UL << 14);

  AddALU("CMP"    , "CMPI"  ,   8UL << 14);

  AddALU("TEST"   , "TESTI" ,   9UL << 14);

  AddALU("ROR"    , NULL    , (10UL << 14) | 0); /* Note: The User guide (Feb '08) differs  */

  AddALU("ROL"    , NULL    , (10UL << 14) | 1); /* from the actual implementation in */

  AddALU("RORC"   , NULL    , (10UL << 14) | 2); /* decoding the last 3 bits of the Rotate */

  AddALU("ROLC"   , NULL    , (10UL << 14) | 3); /* instructions. These values are correct. */

  InstrZ = 0;

  AddReg("INC"    , (2UL << 14)  | (1UL << 13) | 1);

  AddReg("DEC"    , (0UL << 14)  | (1UL << 13) | 1);

  InstrZ = 0;

  if (MomCPU != CPUMico8_V31)

  {

    AddShortBranch("BZ"    , 0x32000);

    AddShortBranch("BNZ"   , 0x32400);

    AddShortBranch("BC"    , 0x32800);

    AddShortBranch("BNC"   , 0x32c00);

    AddShortBranch("CALLZ" , 0x36000);

    AddShortBranch("CALLNZ", 0x36400);

    AddShortBranch("CALLC" , 0x36800);

    AddShortBranch("CALLNC", 0x36c00);

  }

  /* AcQ/MA: a group for unconditional branches, which can support

   *         larger branches then the conditional branches (not supported

   *         in the earliest versions of the Mico8 processor). The branch

   *         range is +2047 to -2048 instead of +511 to -512. */

  InstrZ = 0;

  if (MomCPU != CPUMico8_05)

  {

    if (MomCPU == CPUMico8_V31)

    {

      AddLongBranch("BZ"    , 0x30000);

      AddLongBranch("BNZ"   , 0x31000);

      AddLongBranch("BC"    , 0x32000);

      AddLongBranch("BNC"   , 0x33000);

      AddLongBranch("CALLZ" , 0x34000);

      AddLongBranch("CALLNZ", 0x35000);

      AddLongBranch("CALLC" , 0x36000);

      AddLongBranch("CALLNC", 0x37000);

      AddLongBranch("CALL"  , 0x38000);

      AddLongBranch("B"     , 0x3b000);

    }

    else

    {

      AddLongBranch("B"     , 0x33000);

      AddLongBranch("CALL"  , 0x37000);

    }

  }

  InstrZ = 0;

  if (MomCPU == CPUMico8_V31)

  {

    AddMem("INP"    , "INPI"   , (23UL << 13) | 1, SegIO);

    AddMem("IMPORT" , "IMPORTI", (23UL << 13) | 1, SegIO);

    AddMem("OUTP"   , "OUTPI"  , (23UL << 13) | 0, SegIO);

    AddMem("EXPORT" , "EXPORTI", (23UL << 13) | 0, SegIO);

    AddMem("LSP"    , "LSPI"   , (23UL << 13) | 5, SegData);

    AddMem("SSP"    , "SSPI"   , (23UL << 13) | 4, SegData);

  }

  else

  {

    if (MomCPU == CPUMico8_V3)

    {

      AddMem("INP"    , "INPI"   , (15UL << 14) | 1, SegIO);

      AddMem("OUTP"   , "OUTPI"  , (15UL << 14) | 0, SegIO);

    }

    AddMem("IMPORT" , "IMPORTI", (15UL << 14) | 1, SegIO);

    AddMem("EXPORT" , "EXPORTI", (15UL << 14) | 0, SegIO);

    AddMem("LSP"    , "LSPI"   , (15UL << 14) | 5, SegData);

    AddMem("SSP"    , "SSPI"   , (15UL << 14) | 4, SegData);

  }

  AddInstTable(InstTable, "REG", 0, CodeREG);

  AddInstTable(InstTable, "PORT", 0, DecodePort);

}

static void DeinitFields(void)

{

  DestroyInstTable(InstTable);

  order_array_free(FixedOrders);

  order_array_free(ALUOrders);

  order_array_free(LongBranchOrders);

  order_array_free(ShortBranchOrders);

  order_array_free(MemOrders);

  order_array_free(RegOrders);

}

/*--------------------------------------------------------------------------

 * Semipublic Functions

 *--------------------------------------------------------------------------*/

/*!------------------------------------------------------------------------

 * \fn     InternSymbol_Mico8(char *pArg, TempResult *pResult)

 * \brief  handle built-in (register) symbols for MICO8

 * \param  pArg source argument

 * \param  pResult result buffer

 * ------------------------------------------------------------------------ */

static void InternSymbol_Mico8(char *pArg, TempResult *pResult)

{

  LongWord RegNum;

  if (IsWRegCore(pArg, &RegNum))

  {

    pResult->Typ = TempReg;

    pResult->DataSize = eSymbolSize8Bit;

    pResult->Contents.RegDescr.Reg = RegNum;

    pResult->Contents.RegDescr.Dissect = DissectReg_Mico8;

    pResult->Contents.RegDescr.compare = NULL;

  }

}

static Boolean IsDef_Mico8(void)

{

   return (Memo("REG")) || (Memo("PORT"));

}

static void SwitchFrom_Mico8(void)

{

   DeinitFields();

}

static void MakeCode_Mico8(void)

{

  CodeLen = 0; DontPrint = False;

  /* zu ignorierendes */

   if (Memo("")) return;

   /* Pseudoanweisungen */

   if (DecodeIntelPseudo(True)) return;

   if (!LookupInstTable(InstTable, OpPart.str.p_str))

     WrStrErrorPos(ErrNum_UnknownInstruction, &OpPart);

}

static void SwitchTo_Mico8(void)

{

   const TFamilyDescr *FoundDescr;

   FoundDescr = FindFamilyByName("Mico8");

   TurnWords = True;

   SetIntConstMode(eIntConstModeC);

   PCSymbol = "$"; HeaderID = FoundDescr->Id;

   /* NOP = mov R0,R0 */

   NOPCode = 0x10000;

   DivideChars = ","; HasAttrs = False;

   ValidSegs = (1 << SegCode) | (1 << SegData) | (1 << SegXData) | (1 << SegIO);

   Grans[SegCode] = 4; ListGrans[SegCode] = 4; SegInits[SegCode] = 0;

   SegLimits[SegCode] = IntTypeDefs[CodeAddrInt].Max;

   Grans[SegData] = 1; ListGrans[SegData] = 1; SegInits[SegData] = 0;

   SegLimits[SegData] = IntTypeDefs[DataAddrInt].Max;

   Grans[SegXData] = 1; ListGrans[SegXData] = 1; SegInits[SegXData] = 0;

   SegLimits[SegXData] = 0xff;

   Grans[SegIO] = 1; ListGrans[SegIO] = 1; SegInits[SegIO] = 0;

   SegLimits[SegIO] = 0xff;

   MakeCode = MakeCode_Mico8;

   IsDef = IsDef_Mico8;

   InternSymbol = InternSymbol_Mico8;

   DissectReg = DissectReg_Mico8;

   SwitchFrom = SwitchFrom_Mico8; InitFields();

}

/*--------------------------------------------------------------------------

 * Initialization

 *--------------------------------------------------------------------------*/

void codemico8_init(void)

{

   CPUMico8_05  = AddCPU("Mico8_05" , SwitchTo_Mico8);

   CPUMico8_V3  = AddCPU("Mico8_V3" , SwitchTo_Mico8);

   CPUMico8_V31 = AddCPU("Mico8_V31", SwitchTo_Mico8);

}