void
Compile_LogicalNot ( Compiler * compiler )
{
Word *one = Compiler_WordStack ( compiler, - 1 ) ;
int optFlag = CheckOptimizeOperands ( compiler, 2 ) ;
if ( optFlag == OPTIMIZE_DONE ) return ;
else if ( optFlag )
{
if ( compiler->Optimizer->OptimizeFlag & OPTIMIZE_IMM )
{
_Compile_MoveImm_To_Reg ( EAX, compiler->Optimizer->Optimize_Imm, CELL ) ;
}
else if ( compiler->Optimizer->Optimize_Rm == DSP )
{
_Compile_Move_StackN_To_Reg ( EAX, DSP, 0 ) ;
}
else if ( compiler->Optimizer->Optimize_Rm != EAX )
{
_Compile_VarConstOrLit_RValue_To_Reg ( one, EAX ) ;
}
_Compile_TEST_Reg_To_Reg ( EAX, EAX ) ;
_Compile_SET_tttn_REG ( ZERO, 0, EAX ) ; // SET : this only sets one byte of reg
_Compile_MOVZX_REG ( EAX ) ; // so Zero eXtend reg
if ( compiler->Optimizer->Optimize_Rm != DSP ) // optimize sets this
{
Word *zero = Compiler_WordStack ( compiler, 0 ) ;
_Word_CompileAndRecord_PushEAX ( zero ) ;
}
else Compile_Move_EAX_To_TOS ( DSP ) ;
}
else
{
if ( one->StackPushRegisterCode ) SetHere ( one->StackPushRegisterCode ) ;
else Compile_Move_TOS_To_EAX ( DSP ) ; //_Compile_Move_StackN_To_Reg ( EAX, DSP, 0 ) ;
_Compile_TEST_Reg_To_Reg ( EAX, EAX ) ; //logical and eax eax => if ( eax > 0 ) 1 else 0
_Compile_SET_tttn_REG ( ZERO, 0, EAX ) ; // if (eax == zero) => zero flag is 1 if zero flag is true (1) set EAX to 1 else set eax to 0 :: SET : this only sets one byte of reg
_Compile_MOVZX_REG ( EAX ) ; // so Zero eXtend reg
Word *zero = Compiler_WordStack ( compiler, 0 ) ;
zero->StackPushRegisterCode = Here ;
Compile_Move_EAX_To_TOS ( DSP ) ;
//int a, b, c= 0, d ; a = 1; b = !a, d= !c ; Printf ( "a = %d b = %d c =%d ~d = %d", a, b, c, d ) ;
}
}
void
_CfrTil_EndBlock1 ( BlockInfo * bi )
{
Compiler * compiler = _Context_->Compiler0 ;
if ( _Stack_IsEmpty ( compiler->BlockStack ) )
{
_CfrTil_InstallGotoCallPoints_Keyed ( bi, GI_RETURN ) ;
if ( compiler->NumberOfRegisterVariables && ( compiler->NumberOfStackVariables == 1 ) &&
Compiler_GetState ( compiler, ( RETURN_TOS | RETURN_EAX ) ) )
{
bi->bp_First = bi->Start ;
if ( Compiler_GetState ( compiler, RETURN_EAX ) )
{
Compile_Move_EAX_To_TOS ( DSP ) ;
}
}
else if ( _Compiler_IsFrameNecessary ( compiler ) && ( ! GetState ( compiler, DONT_REMOVE_STACK_VARIABLES ) ) )
{
if ( Compiler_GetState ( compiler, SAVE_ESP ) ) // SAVE_ESP is set by 'return'
{
_ESP_Setup ( ) ;
bi->bp_First = bi->FrameStart ;
}
else bi->bp_First = bi->AfterEspSave ; // 3 : after ESP_Save code in frame setup code
_Compiler_RemoveLocalFrame ( compiler ) ;
}
else
{
bi->bp_First = bi->Start ;
}
}
_Compile_Return ( ) ;
_DataStack_Push ( ( int32 ) bi->bp_First ) ;
bi->bp_Last = Here ;
_SetOffsetForCallOrJump ( bi->JumpOffset, Here, 0 ) ;
}
void
_Compiler_RemoveLocalFrame ( Compiler * compiler )
{
int32 parameterVarsSubAmount, returnValueFlag ;
Compiler_SetLocalsFrameSize_AtItsCellOffset ( compiler ) ;
parameterVarsSubAmount = ( compiler->NumberOfParameterVariables * CELL ) ;
if ( GetState ( _Context_, C_SYNTAX ) && ( ! String_Equal ( compiler->CurrentWord->S_ContainingNamespace->Name, "void" ) ) )
{
SetState ( compiler, RETURN_TOS, true ) ;
}
//returnValueFlag = rvf = ( _Context_->CurrentRunWord->CProperty & C_RETURN ) || ( GetState ( compiler, RETURN_TOS | RETURN_EAX ) ) || IsWordRecursive || compiler->ReturnVariableWord ;
returnValueFlag = ( _Context_->CurrentlyRunningWord->CProperty & C_RETURN ) || ( GetState ( compiler, RETURN_TOS | RETURN_EAX ) ) || IsWordRecursive || compiler->ReturnVariableWord ;
Word * word = compiler->ReturnVariableWord ;
#if 0
if ( GetState ( _Context_->Compiler0, SAVE_ESP ) )
{
_Compile_ESP_Restore ( ) ;
}
#endif
if ( word )
{
_Compile_GetVarLitObj_RValue_To_Reg ( word, EAX, 0 ) ; // nb. these variables have no lasting lvalue - they exist on the stack - therefore we can only return there rvalue
}
//else if ( compiler->NumberOfParameterVariables && returnValueFlag && ( ! compiler->NumberOfRegisterVariables ) && ( ! GetState ( compiler, RETURN_EAX ) ) )
else if ( compiler->NumberOfParameterVariables && returnValueFlag && ( ! GetState ( compiler, RETURN_EAX ) ) )
{
#if 0 // for some unknown reason this code will overwrite the function call address also
byte add_esi_eax [ ] = { 0x01, 0x06 } ; //0106 add [esi], eax
byte * here = _Q_CodeByteArray->EndIndex ;
if ( memcmp ( add_esi_eax, here - 2, 2 ) )
{
//_ByteArray_UnAppendSpace ( _Q_CodeByteArray, 2 ) ;
SetHere ( Here - 2 ) ;
_Compile_X_Group1 ( ADD, REG, MEM, EAX, DSP, 0, 0, CELL ) ; // result is on TOS
}
//{returnValueFlag ++ ; rvf = 0 ;}
//else
#else
Compile_Move_TOS_To_EAX ( DSP ) ; // save TOS to EAX so we can set return it as TOS below
#endif
//else { parameterVarsSubAmount += CELL ; rvf = 0 ; }
}
else if ( GetState ( compiler, RETURN_TOS ) )
{
Compile_Move_TOS_To_EAX ( DSP ) ;
}
_Compile_LEA ( DSP, FP, 0, - LocalVarIndex_Disp ( 1 ) ) ; // restore sp - release locals stack frame
_Compile_Move_StackN_To_Reg ( FP, DSP, 1 ) ; // restore the saved pre fp - cf AddLocalsFrame
// remove the incoming parameters -- like in C
parameterVarsSubAmount -= returnValueFlag * CELL ; // reduce the subtract amount to make room for the return value
if ( parameterVarsSubAmount > 0 )
{
Compile_SUBI ( REG, DSP, 0, parameterVarsSubAmount, CELL ) ; // remove stack variables
}
else if ( parameterVarsSubAmount < 0 )
{
Compile_ADDI ( REG, DSP, 0, - parameterVarsSubAmount, CELL ) ; // add a place on the stack for return value
}
//if ( rvf && returnValueFlag && ( ! GetState ( compiler, RETURN_EAX ) ) )
if ( returnValueFlag && ( ! GetState ( compiler, RETURN_EAX ) ) )
{
// nb : stack was already adjusted accordingly for this above by reducing the SUBI subAmount or adding if there weren't any parameter variables
Compile_Move_EAX_To_TOS ( DSP ) ;
}
}
