cg_name Concat( uint num_args, cg_name dest ) {
//=============================================
// Do concatenation operation.
int count;
call_handle call;
cg_name dest_1;
cg_name dest_2;
if( num_args & CAT_TEMP ) {
call = InitCall( RT_TCAT );
num_args &= ~CAT_TEMP;
} else if( num_args == 1 ) {
call = InitCall( RT_MOVE );
} else {
call = InitCall( RT_CAT );
}
count = num_args;
while( count > 0 ) {
CGAddParm( call, StkElement( count ), TY_LOCAL_POINTER );
--count;
}
PopStkElements( num_args );
CloneCGName( dest, &dest_1, &dest_2 );
CGAddParm( call, dest_1, TY_LOCAL_POINTER );
if( num_args != 1 ) {
CGAddParm( call, CGInteger( num_args, TY_UNSIGNED ), TY_UNSIGNED );
}
return( CGBinary( O_COMMA, CGCall( call ), dest_2, TY_LOCAL_POINTER ) );
}
static void XMulDivMix( int op, bool cmplx_scalar, uint_16 typ_info ) {
//=====================================================================
// Binary F-Code processor for mixed multiplication and division.
cg_cmplx z;
cg_name s;
cg_type s_typ;
cg_type z_typ;
cg_name s_1;
cg_name s_2;
if( cmplx_scalar ) {
z_typ = GetType1( typ_info );
s_typ = GetType2( typ_info );
XPopCmplx( &z, z_typ );
s = XPopValue( s_typ );
} else {
s_typ = GetType1( typ_info );
z_typ = GetType2( typ_info );
s = XPopValue( s_typ );
XPopCmplx( &z, z_typ );
}
z_typ = ResCGType( s_typ, CmplxBaseType( z_typ ) );
CloneCGName( s, &s_1, &s_2 );
XPush( CGBinary( op, z.imagpart, s_1, z_typ ) );
XPush( CGBinary( op, z.realpart, s_2, z_typ ) );
}
void SplitCmplx( cg_name cmplx_addr, cg_type typ ) {
//=====================================================
// Split real and imaginary parts of complex number.
cg_name cmplx_1;
cg_name cmplx_2;
typ = CmplxBaseType( typ );
CloneCGName( cmplx_addr, &cmplx_1, &cmplx_2 );
XPush( CGUnary( O_POINTS, ImagPtr( cmplx_1, typ ), typ ) );
XPush( CGUnary( O_POINTS, cmplx_2, typ ) );
}
static void InLineMulCC( uint_16 typ_info ) {
//===========================================
// Do complex multiplication in-line.
// (c,d) * (a,b).
cg_name d_1;
cg_name d_2;
cg_name c_1;
cg_name c_2;
cg_name b_1;
cg_name b_2;
cg_name a_1;
cg_name a_2;
cg_type typ1;
cg_type typ2;
cg_cmplx x;
cg_cmplx y;
typ1 = GetType1( typ_info );
typ2 = GetType2( typ_info );
XPopCmplx( &x, typ1 );
XPopCmplx( &y, typ2 );
typ1 = CmplxBaseType( typ1 );
typ2 = CmplxBaseType( typ2 );
CloneCGName( x.realpart, &a_1, &a_2 );
CloneCGName( x.imagpart, &b_1, &b_2 );
CloneCGName( y.realpart, &c_1, &c_2 );
CloneCGName( y.imagpart, &d_1, &d_2 );
typ1 = ResCGType( typ1, typ2 );
XPush( CGBinary( O_PLUS,
CGBinary( O_TIMES, a_1, d_1, typ1 ),
CGBinary( O_TIMES, b_1, c_1, typ1 ),
typ1 ) );
XPush( CGBinary( O_MINUS,
CGBinary( O_TIMES, a_2, c_2, typ1 ),
CGBinary( O_TIMES, b_2, d_2, typ1 ),
typ1 ) );
}
void FCCharNMove( void ) {
//=====================
// Perform N character assignment of non optimal lengths.
int src_len;
int dst_len;
cg_name dst;
cg_name dst2;
call_handle call;
bool equal = FALSE;
src_len = GetInt();
dst_len = GetInt();
if( src_len < dst_len ) {
call = InitInlineCall( INLINE_STRBLAST_NE );
} else {
src_len = dst_len;
equal = TRUE;
call = InitInlineCall( INLINE_STRBLAST_EQ );
}
dst = XPop();
CloneCGName( dst, &dst, &dst2 );
if( OZOpts & OZOPT_O_SPACE || !equal ) {
CGAddParm( call, CGInteger( src_len, TY_INTEGER ), TY_INTEGER );
} else {
// Special but common case, so we optimize it.
CGAddParm( call, CGInteger( src_len & TAIL_MASK, TY_INTEGER ),
TY_INTEGER );
CGAddParm( call, CGInteger( src_len >> TAIL_SHIFT, TY_INTEGER ),
TY_INTEGER );
}
CGAddParm( call, SCBPointer( XPop() ), TY_LOCAL_POINTER );
if( !equal ) {
CGAddParm( call, CGInteger( dst_len - src_len, TY_INTEGER ), TY_INTEGER );
}
CGAddParm( call, SCBPointer( dst ), TY_LOCAL_POINTER );
XPush( CGBinary( O_COMMA, CGCall( call ), dst2, TY_LOCAL_POINTER ) );
}
void FCSubString( void ) {
//=====================
// Do substring operation.
sym_id char_var;
sym_id dest;
cg_name src;
cg_name first_1;
cg_name first_2;
cg_name last;
unsigned_16 typ_info;
cg_name len;
cg_name ptr;
call_handle call;
char_var = GetPtr();
typ_info = GetU16();
src = XPop();
first_1 = XPopValue( GetType1( typ_info ) );
if( char_var == NULL ) { // i.e. chr(i:i)
len = CGInteger( GetInt(), TY_INTEGER );
if( Options & OPT_BOUNDS ) {
CloneCGName( first_1, &first_1, &last );
last = CGBinary( O_PLUS, last, len, TY_INTEGER );
last = CGBinary( O_MINUS, last, CGInteger( 1, TY_INTEGER ),
TY_INTEGER );
}
} else {
last = XPop();
if( last == NULL ) {
if( char_var->ns.xt.size == 0 ) {
last = CharItemLen( char_var );
} else {
last = CGInteger( char_var->ns.xt.size, TY_INTEGER );
}
} else {
XPush( last );
last = XPopValue( GetType2( typ_info ) );
}
if( !( Options & OPT_BOUNDS ) ) {
CloneCGName( first_1, &first_1, &first_2 );
len = CGBinary( O_MINUS, last, first_2, TY_INTEGER );
len = CGBinary( O_PLUS, len, CGInteger( 1, TY_INTEGER ), TY_INTEGER );
}
}
dest = GetPtr();
if( Options & OPT_BOUNDS ) {
call = InitCall( RT_SUBSTRING );
CGAddParm( call, CGFEName( dest, TY_CHAR ), TY_LOCAL_POINTER );
CGAddParm( call, last, TY_INT_4 );
CGAddParm( call, first_1, TY_INT_4 );
CGAddParm( call, src, TY_LOCAL_POINTER );
XPush( CGBinary( O_COMMA, CGCall( call ), CGFEName( dest, TY_CHAR ),
TY_LOCAL_POINTER ) );
} else {
ptr = CGBinary( O_PLUS, SCBPointer( src ),
CGBinary( O_MINUS, first_1, CGInteger( 1, TY_INTEGER ),
TY_INTEGER ),
TY_GLOBAL_POINTER );
CGTrash( CGAssign( SCBLenAddr( CGFEName( dest, TY_CHAR ) ),
len, TY_INTEGER ) );
// Assumption is that the pointer in the SCB is the first field in
// the SCB so that when we push the cg_name returned by CGAssign()
// it is a pointer to the SCB. We must leave the assignment of the
// pointer into the SCB in the tree so that the aliasing information
// is not lost.
XPush( CGLVAssign( SCBPtrAddr( CGFEName( dest, TY_CHAR ) ),
ptr, TY_GLOBAL_POINTER ) );
// Don't do it the following way:
// CGTrash( CGAssign( SCBPtrAddr( CGFEName( dest, TY_CHAR ) ),
// ptr, TY_GLOBAL_POINTER ) );
// XPush( CGFEName( dest, TY_CHAR ) );
}
}
void CmplxAssign( sym_id sym, cg_type dst_typ, cg_type src_typ ) {
//===========================================================================
// Do complex assignment.
cg_type typ;
cg_name dest;
cg_name dest_1;
cg_name dest_2;
cg_cmplx z;
uint_16 flags;
temp_handle tr;
temp_handle ti;
flags = sym->u.ns.flags;
dest = NULL;
if( (flags & SY_CLASS) == SY_SUBPROGRAM ) {
// assigning to statement function
if( (OZOpts & OZOPT_O_INLINE) == 0 ) {
dest = SymAddr( sym );
}
} else {
// check for structure type before checking for array
// Consider: A(1).X = A(2).X
// where A is an array of structures containing complex field X
if( sym->u.ns.u1.s.typ == FT_STRUCTURE ) {
dest = XPop();
GetU16(); // ignore structure information
} else if( flags & SY_SUBSCRIPTED ) {
dest = XPop();
} else {
dest = SymAddr( sym );
}
}
typ = CmplxBaseType( dst_typ );
if( ( src_typ != TY_COMPLEX ) && ( src_typ != TY_DCOMPLEX ) &&
( src_typ != TY_XCOMPLEX ) ) {
z.realpart = XPopValue( src_typ );
z.imagpart = CGInteger( 0, typ );
} else {
XPopCmplx( &z, src_typ );
z.imagpart = CGEval( z.imagpart );
}
z.realpart = CGEval( z.realpart );
// Before assigning the real and imaginary parts, force evaluation of each.
// Consider: Z = Z * Z
// The above expression will be evaluated as follows.
// z.r = z.r*z.r - z.i*z.i
// z.i = z.r*z.i + z.r*z.i
// In the expression that evaluates the imaginary part, the value of "z.r"
// must be the original value and not the new value.
if( ((flags & SY_CLASS) == SY_SUBPROGRAM) && (OZOpts & OZOPT_O_INLINE) ) {
XPush( z.imagpart );
XPush( z.realpart );
return;
}
// Code to avoid the criss cross problem
// i.e. z = complx(imag(z), real(z))
// or similar problems due to overwriting of one part with the other
// before accessing it.
// This should not affect efficiency (for optimized code) very much
// because the temps will not be used when they are not required
tr = CGTemp( typ );
ti = CGTemp( typ );
CGDone( CGAssign( CGTempName( tr, typ ), z.realpart, typ ) );
CGDone( CGAssign( CGTempName( ti, typ ), z.imagpart, typ ) );
CloneCGName( dest, &dest_1, &dest_2 );
XPush( CGAssign( ImagPtr( dest_2, typ ),
CGUnary( O_POINTS, CGTempName( ti, typ ), typ ), typ ) );
XPush( CGAssign( dest_1, CGUnary( O_POINTS, CGTempName( tr, typ ), typ ),
typ ) );
}