PTREE FoldUnary( PTREE expr )
/***************************/
{
PTREE op1;
TYPE result_type;
bool dont_care;
op1 = expr->u.subtree[0];
if( notFoldable( op1 ) ) {
switch( expr->cgop ) {
case CO_EXCLAMATION:
if( nonZeroExpr( op1 ) ) {
expr = makeTrueFalse( expr, op1, 0 );
}
break;
}
return( expr );
}
result_type = expr->type;
if( op1->op == PT_FLOATING_CONSTANT ) {
switch( expr->cgop ) {
case CO_EXCLAMATION:
op1->u.int64_constant.u._32[ I64HI32 ] = 0;
op1->u.int64_constant.u._32[ I64LO32 ]
= ( BFSign( op1->u.floating_constant ) == 0 );
op1->op = PT_INT_CONSTANT;
op1 = NodeSetBooleanType( op1 );
break;
case CO_UMINUS:
BFNegate( op1->u.floating_constant );
break;
case CO_UPLUS:
break;
default:
return( expr );
}
op1 = PTreeCopySrcLocation( op1, expr );
PTreeFree( expr );
return( castConstant( op1, result_type, &dont_care ) );
}
switch( expr->cgop ) {
case CO_TILDE:
op1->u.int64_constant.u._32[0] = ~ op1->u.int64_constant.u._32[0];
op1->u.int64_constant.u._32[1] = ~ op1->u.int64_constant.u._32[1];
break;
case CO_EXCLAMATION:
op1 = makeBooleanConst( op1, ! nonZeroExpr( op1 ) );
break;
case CO_UMINUS:
U64Neg( &op1->u.int64_constant, &op1->u.int64_constant );
break;
case CO_UPLUS:
break;
default:
return( expr );
}
op1 = PTreeCopySrcLocation( op1, expr );
PTreeFree( expr );
return( castConstant( op1, result_type, &dont_care ) );
}
BOOL StrToU64( char *str, unsigned_64 *u64, BOOL neg )
{
unsigned_64 r64;
unsigned_64 v64;
int value;
int radix;
str = eatSpace( str );
U32ToU64( 0, u64 );
if( neg == TRUE ) {
if( *str == '-') {
str++;
} else {
if( *str == '+' ) {
str++;
neg = FALSE;
}
}
}
str = eatSpace( str );
switch( *str ){
case '\0':
return( FALSE );
case '0':
str++;
if( tolower(*str) == 'x' ) {
radix = 16;
str++;
} else {
radix = 8;
}
break;
default:
radix = 10;
}
U32ToU64( radix, &r64 );
while( *str != '\0' ) {
if( isdigit( *str ) ) {
value = *str - '0';
} else {
value = 10 + tolower( *str ) - 'a';
}
if( value < 0 || value >= radix ) {
return ( FALSE );
}
U32ToU64( value, &v64 );
U64Mul( u64, &r64, u64 );
U64Add( &v64, u64, u64 );
str++;
}
if( neg == TRUE) {
U64Neg( u64, u64 );
}
return( TRUE );
}
static
signed_64 BFCnvF64( float_handle flt )
{
signed_64 result;
float_handle absol, t0, t1, t2, t3;
bool positive;
int sign = BFSign( flt );
if( 0 == sign ) {
result.u._32[0] = 0;
result.u._32[1] = 0;
return result;
}
positive = true;
absol = flt;
if( sign < 0 ) {
positive = false;
absol = BFCopy( flt );
BFNegate( absol );
}
t0 = TwoTo32();
t1 = BFDiv( flt, t0 );
t3 = BFTrunc( t1 );
BFFree( t1 );
result.u._32[ I64HI32 ] = BFCnvF32( t3 );
BFFree( t3 );
t1 = BFCnvUF( result.u._32[ I64HI32 ] );
t2 = BFMul( t0, t1 );
BFFree( t0 );
BFFree( t1 );
t0 = BFSub( flt, t2 );
BFFree( t2 );
t3 = BFTrunc( t0 );
BFFree( t0 );
result.u._32[ I64LO32 ] = BFCnvF32( t3 );
BFFree( t3 );
if( ! positive ) {
signed_64 neg;
BFFree( absol );
neg = result;
U64Neg( &neg, &result );
}
return result;
}
int64 operator-() const
{
int64 neg;
U64Neg( &this->_d, &neg._d );
return( neg );
}
