1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
{
Copyright (c) 1998-2011 by Florian Klaempfl, Jonas Maebe
Generates i8086 assembler for typed constant declarations
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit n8086tcon;
{$i fpcdefs.inc}
interface
uses
node,symdef,ngtcon;
type
{ ti8086typedconstbuilder }
ti8086typedconstbuilder = class(tasmlisttypedconstbuilder)
protected
procedure tc_emit_orddef(def: torddef; var node: tnode);override;
procedure tc_emit_pointerdef(def: tpointerdef; var node: tnode);override;
end;
implementation
uses
verbose,compinnr,
ncon,ncnv,ninl,nld,
defcmp,defutil,
aasmtai,
symconst,symtype,symsym,symcpu,
htypechk;
{ ti8086typedconstbuilder }
procedure ti8086typedconstbuilder.tc_emit_orddef(def: torddef; var node: tnode);
var
hp: tnode;
srsym: tsym;
pd: tprocdef;
begin
{ support word/smallint constants, initialized with Seg() }
if (def.ordtype in [u16bit,s16bit]) and (node.nodetype=inlinen) and
(tinlinenode(node).inlinenumber=in_seg_x) then
begin
hp:=tunarynode(node).left;
if (hp.nodetype=typeconvn) and
(ttypeconvnode(hp).convtype=tc_proc_2_procvar) then
hp:=tunarynode(hp).left;
if hp.nodetype=loadn then
begin
srsym:=tloadnode(hp).symtableentry;
case srsym.typ of
procsym :
begin
pd:=tprocdef(tprocsym(srsym).ProcdefList[0]);
if Tprocsym(srsym).ProcdefList.Count>1 then
Message(parser_e_no_overloaded_procvars);
if po_abstractmethod in pd.procoptions then
Message(type_e_cant_take_address_of_abstract_method)
else
ftcb.emit_tai(Tai_const.Create_seg_name(pd.mangledname),u16inttype);
end;
staticvarsym :
ftcb.emit_tai(Tai_const.Create_seg_name(tstaticvarsym(srsym).mangledname),u16inttype);
labelsym :
ftcb.emit_tai(Tai_const.Create_seg_name(tlabelsym(srsym).mangledname),u16inttype);
else
Message(type_e_variable_id_expected);
end;
end
else
Message(parser_e_illegal_expression);
end
{ support word/smallint constants, initialized with Ofs() or Word(@s) }
else if (def.ordtype in [u16bit,s16bit]) and (node.nodetype=typeconvn) and
((Ttypeconvnode(node).left.nodetype=addrn) or
is_proc2procvar_load(Ttypeconvnode(node).left,pd)) then
begin
hp:=tunarynode(Ttypeconvnode(node).left).left;
if (hp.nodetype=typeconvn) and
(ttypeconvnode(hp).convtype=tc_proc_2_procvar) then
hp:=tunarynode(hp).left;
if hp.nodetype=loadn then
begin
srsym:=tloadnode(hp).symtableentry;
case srsym.typ of
procsym :
begin
pd:=tprocdef(tprocsym(srsym).ProcdefList[0]);
if Tprocsym(srsym).ProcdefList.Count>1 then
Message(parser_e_no_overloaded_procvars);
if po_abstractmethod in pd.procoptions then
Message(type_e_cant_take_address_of_abstract_method)
else
ftcb.emit_tai(Tai_const.Createname_near(pd.mangledname,0),u16inttype);
end;
staticvarsym :
ftcb.emit_tai(Tai_const.Createname_near(tstaticvarsym(srsym).mangledname,0),u16inttype);
labelsym :
ftcb.emit_tai(Tai_const.Createname_near(tlabelsym(srsym).mangledname,0),u16inttype);
else
Message(type_e_variable_id_expected);
end;
end
else
Message(parser_e_illegal_expression);
end
else
inherited;
end;
procedure ti8086typedconstbuilder.tc_emit_pointerdef(def: tpointerdef; var node: tnode);
var
hp: tnode;
begin
{ remove equal typecasts for pointer/nil addresses }
if (node.nodetype=typeconvn) then
with Ttypeconvnode(node) do
if (left.nodetype in [addrn,niln]) and equal_defs(def,node.resultdef) then
begin
hp:=left;
left:=nil;
node.free;
node:=hp;
end;
{ const pointer ? }
if (node.nodetype = pointerconstn) then
begin
ftcb.queue_init(def);
if is_farpointer(def) or is_hugepointer(def) then
begin
ftcb.queue_typeconvn(s32inttype,def);
ftcb.queue_emit_ordconst(longint(tpointerconstnode(node).value),s32inttype);
end
else
begin
ftcb.queue_typeconvn(s16inttype,def);
ftcb.queue_emit_ordconst(smallint(tpointerconstnode(node).value),s16inttype);
end;
end
else if node.nodetype=niln then
begin
if is_farpointer(def) or is_hugepointer(def) then
ftcb.emit_tai(Tai_const.Create_32bit(0),u32inttype)
else
ftcb.emit_tai(Tai_const.Create_16bit(0),u16inttype);
end
else
inherited tc_emit_pointerdef(def, node);
end;
begin
ctypedconstbuilder:=ti8086typedconstbuilder;
end.
|
