source: dev/BasicCompiler32/Compile_Set_Var.cpp@ 96

#include "../BasicCompiler_Common/common.h"
#include "Opcode.h"

BOOL IsUse_ecx(RELATIVE_VAR *pRelativeVar){
    if(pRelativeVar->bOffsetOffset||pRelativeVar->dwKind==VAR_DIRECTMEM) return 1;
    return 0;
}

void SetStructVariable( const Type &varType, const Type &calcType, BOOL bUseHeap){
    if( calcType.IsStruct() ){
        if( varType.GetClass().IsEquals( &calcType.GetClass() ) ){          //等しい

                //双方のオブジェクト型が一致、または派生・継承関係にあるとき
                //※コピーを行う

                int object_size = varType.GetClass().GetSize();

                //mov ecx,object_size
                op_mov_RV(REG_ECX,object_size);

                //pop esi
                op_pop(REG_ESI);

                //pop edi
                op_pop(REG_EDI);

                if(bUseHeap){
                    //mov eax,esi
                    op_mov_RR(REG_EAX,REG_ESI);
                }

                //rep movs byte ptr[edi],byte ptr[esi]
                op_rep_movs(sizeof(BYTE));

                if(bUseHeap){
                    //push eax
                    op_push(REG_EAX);

                    //call free
                    extern UserProc *pSub_free;
                    op_call(pSub_free);
                }

                return;
        }
    }

    SetError(1,NULL,cp);
}


void SetRealVariable(int VarType,int CalcType,RELATIVE_VAR *pRelativeVar){
    if( !IsRealNumberType( CalcType ) ){
        // 実数へ変換
        // 64bit edx:eax -> st(0)
        // 32bit     eax -> st(0)

        if( Is64Type( CalcType ) ){
            //64ビット整数型

            //push edx
            op_push( REG_EDX );

            //push eax
            op_push( REG_EAX );

            //fild qword ptr[esp]
            op_fld_ptr_esp(DEF_INT64);

            //pop
            op_pop( REG_NON );

            //pop
            op_pop( REG_NON );
        }
        else{
            //push eax
            op_push( REG_EAX );

            //fild qword ptr[esp]
            op_fld_ptr_esp(DEF_LONG);

            //pop
            op_pop( REG_NON );
        }
    }

    if(pRelativeVar->dwKind==VAR_GLOBAL){
        if(pRelativeVar->bOffsetOffset){
            //fstp ptr[ecx+offset]
            op_fstp_base_offset(VarType,REG_ECX,(int)pRelativeVar->offset);
            obp-=sizeof(long);
            pobj_GlobalVarSchedule->add();
            obp+=sizeof(long);
        }
        else{
            //mov ecx,offset
            op_mov_RV(REG_ECX,(int)pRelativeVar->offset);
            obp-=sizeof(long);
            pobj_GlobalVarSchedule->add();
            obp+=sizeof(long);

            //fstp ptr[ecx]
            op_fstp_basereg(VarType,REG_ECX);
        }
    }
    else if(pRelativeVar->dwKind==VAR_REFGLOBAL){
        if(pRelativeVar->bOffsetOffset){
            //add ecx,qword ptr[offset]
            op_add_RM(sizeof(long),REG_ECX,REG_NON,(int)pRelativeVar->offset,MOD_DISP32);
        }
        else{
            //mov ecx,qword ptr[offset]
            op_mov_RM(sizeof(long),REG_ECX,REG_NON,(int)pRelativeVar->offset,MOD_DISP32);
        }
        obp-=sizeof(long);
        pobj_GlobalVarSchedule->add();
        obp+=sizeof(long);

        goto directmem;
    }
    else if(pRelativeVar->dwKind==VAR_LOCAL){
        if(pRelativeVar->bOffsetOffset){
            //fstp ptr[ebp+ecx+offset]
            op_fstp_base_offset_ex(VarType,REG_EBP,REG_ECX,(int)pRelativeVar->offset,USE_OFFSET);
        }
        else{
            //fstp ptr[ebp+offset]
            op_fstp_base_offset(VarType,REG_EBP,(int)pRelativeVar->offset);
        }
        obp-=sizeof(long);
        AddLocalVarAddrSchedule();
        obp+=sizeof(long);
    }
    else if(pRelativeVar->dwKind==VAR_REFLOCAL){
        if(pRelativeVar->bOffsetOffset){
            //add ecx,qword ptr[ebp+offset]
            op_add_RM(sizeof(long),REG_ECX,REG_EBP,(int)pRelativeVar->offset,MOD_BASE_DISP32);
        }
        else{
            //mov ecx,qword ptr[ebp+offset]
            op_mov_RM(sizeof(long),REG_ECX,REG_EBP,(int)pRelativeVar->offset,MOD_BASE_DISP32);
        }
        obp-=sizeof(long);
        AddLocalVarAddrSchedule();
        obp+=sizeof(long);

        goto directmem;
    }
    else if(pRelativeVar->dwKind==VAR_DIRECTMEM){
directmem:
        //fstp ptr[ecx]
        op_fstp_basereg(VarType,REG_ECX);
    }
}

void SetBooleanVariable(int type,RELATIVE_VAR *pRelative){
    if(type==DEF_DOUBLE){
        // TODO: 実装
        SetError();
    }
    else if(type==DEF_SINGLE){
        // TODO: 実装
        SetError();
    }
    else if(type==DEF_INT64||type==DEF_QWORD){
        //cmp eax,0
        op_cmp_value(GetTypeSize(type,-1),REG_EAX,0);

        //setne al
        op_setne( REG_EAX );

        //cmp edx,0
        op_cmp_value(GetTypeSize(type,-1),REG_EDX,0);

        //setne cl
        op_setne( REG_ECX );

        //or al,cl
        op_or_RR( sizeof( _int8 ), REG_EAX, REG_ECX );
    }
    else{
        if(!IsWholeNumberType(type)){
            //不正な型の場合
            SetError(9,NULL,cp);
            return;
        }
    }

    //cmp eax,0
    op_cmp_value(GetTypeSize(type,-1),REG_EAX,0);

    //setne al
    op_setne( REG_EAX );

    SetWholeVariable( sizeof(char), DEF_BYTE, pRelative );
}

void ExtendTypeTo32(int type,int reg);
void ExtendTypeTo64(int type){
    if(Is64Type(type)) return;

    ExtendTypeTo32(type,REG_EAX);

    if(IsSignedType(type)){
        //cdq
        op_cdq();
    }
    else{
        //xor edx,edx
        op_zero_reg(REG_EDX);
    }
}
void ExtendTypeTo32(int type,int reg){
    if(type==DEF_INTEGER || (isUnicode&&type==DEF_CHAR)){
        //movsx reg32,reg16
        op_movsx_R32R16(reg,reg);
    }
    else if(type==DEF_WORD){
        //and reg,0000FFFFh
        op_and_RV(reg,(int)0x0000FFFF);
    }
    else if(type==DEF_SBYTE || (isUnicode==false&&type==DEF_CHAR)){
        //movsx reg32,reg8
        op_movsx_R32R8(reg,reg);
    }
    else if(type==DEF_BYTE||type==DEF_BOOLEAN){
        //and reg,000000FFh
        op_and_RV(reg,(int)0xFF);
    }
}
void ExtendTypeTo16(int type,int reg){
    if(type==DEF_SBYTE || (isUnicode==false&&type==DEF_CHAR)){
        //movsx reg16,reg8
        op_movsx_R16R8(reg,reg);
    }
    else if(type==DEF_BYTE||type==DEF_BOOLEAN){
        //and reg,000000FFh
        op_and_RV(reg,(int)0xFF);
    }
}

void SetWholeVariable(int varSize,int calcType,RELATIVE_VAR *pRelative){
    if( IsRealNumberType( calcType ) ){
        // 実数型から整数型へ変換する

        if( varSize == sizeof(_int64) ){
            // 64bitへ
            // st(0) -> edx:eax
            breakpoint;

            //push
            //push
            op_sub_esp( PTR_SIZE * 2 );

            //fistp qword ptr[esp]
            op_fistp_ptr_esp( sizeof(_int64) );

            //pop eax
            op_pop( REG_EAX );

            //pop edx
            op_pop( REG_EDX );
        }
        else{
            // 32bit
            // st(0) -> eax

            //push
            op_push( REG_NON );

            //fistp dword ptr[esp]
            op_fistp_ptr_esp( sizeof(long) );

            //pop eax
            op_pop( REG_EAX );
        }
    }
    else{
        //その他の整数

        if(varSize==sizeof(_int64)){
            //eaxの値を64ビット（edx:eax）に拡張する
            ExtendTypeTo64(calcType);
        }
        else if(varSize==sizeof(long)){
            //レジスタの値を32ビット（eax）に拡張する
            ExtendTypeTo32(calcType,REG_EAX);
        }
        else if(varSize==sizeof(short)){
            //レジスタの値を16ビット（ax）に拡張する
            ExtendTypeTo16(calcType,REG_EAX);
        }
        //8ビットは拡張なし
    }

    if(varSize==sizeof(_int64)){
        //下位32ビット
        SetWholeVariable(sizeof(long),DEF_LONG,pRelative);

        //上位32ビット

        //直接参照に切り替え
        SetVarPtrToEax(pRelative);
        pRelative->dwKind=VAR_DIRECTMEM;

        //mov ecx,eax
        op_mov_RR( REG_ECX, REG_EAX );

        //add ecx,sizeof(long)
        op_add_RV8( REG_ECX, sizeof(long) );

        //mov eax,edx
        op_mov_RR( REG_EAX, REG_EDX );

        SetWholeVariable(sizeof(long),DEF_LONG,pRelative);

        return;
    }

    if(pRelative->dwKind==VAR_GLOBAL){
        if(pRelative->bOffsetOffset){
            //mov ptr[ecx+offset],eax/ax/al
            op_mov_MR(varSize,REG_EAX,REG_ECX,(int)pRelative->offset,MOD_BASE_DISP32);
        }
        else{
            //mov ptr[offset],eax/ax/al
            op_mov_MR(varSize,REG_EAX,0,(int)pRelative->offset,MOD_DISP32);
        }
        obp-=sizeof(long);
        pobj_GlobalVarSchedule->add();
        obp+=sizeof(long);
    }
    else if(pRelative->dwKind==VAR_REFGLOBAL){
        if(pRelative->bOffsetOffset){
            //add ecx,qword ptr[offset]
            op_add_RM(varSize,REG_ECX,REG_NON,(int)pRelative->offset,MOD_DISP32);
        }
        else{
            //mov ecx,qword ptr[offset]
            op_mov_RM(varSize,REG_ECX,REG_NON,(int)pRelative->offset,MOD_DISP32);
        }
        obp-=sizeof(long);
        pobj_GlobalVarSchedule->add();
        obp+=sizeof(long);

        goto directmem;
    }
    else if(pRelative->dwKind==VAR_LOCAL){
        if(pRelative->bOffsetOffset){
            //mov ptr[ebp+ecx+offset],eax/ax/al
            op_mov_MR_ex(varSize,REG_EAX,REG_EBP,REG_ECX,(int)pRelative->offset,USE_OFFSET);
        }
        else{
            //mov ptr[ebp+offset],eax/ax/al
            op_mov_MR(varSize,REG_EAX,REG_EBP,(int)pRelative->offset,MOD_BASE_DISP32);
        }
        obp-=sizeof(long);
        AddLocalVarAddrSchedule();
        obp+=sizeof(long);
    }
    else if(pRelative->dwKind==VAR_REFLOCAL){
        if(pRelative->bOffsetOffset){
            //add ecx,qword ptr[ebp+offset]
            op_add_RM(varSize,REG_ECX,REG_EBP,(int)pRelative->offset,MOD_BASE_DISP32);
        }
        else{
            //mov ecx,qword ptr[ebp+offset]
            op_mov_RM(varSize,REG_ECX,REG_EBP,(int)pRelative->offset,MOD_BASE_DISP32);
        }
        obp-=sizeof(long);
        AddLocalVarAddrSchedule();
        obp+=sizeof(long);

        goto directmem;
    }
    else if(pRelative->dwKind==VAR_DIRECTMEM){
directmem:

        //mov ptr[ecx],eax/ax/al
        op_mov_MR(varSize,REG_EAX,REG_ECX,0,MOD_BASE);
    }
}