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- {
- $Id: hcodegen.pas,v 1.1.1.1 1998/03/25 11:18:13 root Exp $
- Copyright (c) 1996-98 by Florian Klaempfl
-
- This unit exports some help routines for the code generation
-
- 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 hcodegen;
-
- interface
-
- uses
- cobjects,systems,globals,tree,symtable,types,strings,aasm
- {$ifdef i386}
- ,i386
- {$endif}
- {$ifdef m68k}
- ,m68k
- {$endif}
- ;
-
- const
- { set, if the procedure uses asm }
- pi_uses_asm = $1;
- { set, if the procedure is exported by an unit }
- pi_is_global = $2;
- { set, if the procedure does a call }
- { this is for the optimizer }
- pi_do_call = $4;
- { if the procedure is an operator }
- pi_operator = $8;
- { set, if the procedure is an external C function }
- pi_C_import = $10;
-
- type
- pprocinfo = ^tprocinfo;
-
- tprocinfo = record
- { pointer to parent in nested procedures }
- parent : pprocinfo;
- { current class, if we are in a method }
- _class : pobjectdef;
- { return type }
- retdef : pdef;
- { frame pointer offset }
- framepointer_offset : longint;
- { self pointer offset }
- ESI_offset : longint;
- { result value offset }
- retoffset : longint;
-
- { firsttemp position }
- firsttemp : longint;
-
- funcret_is_valid : boolean;
-
- { parameter offset }
- call_offset : longint;
-
- { some collected informations about the procedure }
- { see pi_xxxx above }
- flags : longint;
-
- { register used as frame pointer }
- framepointer : tregister;
-
- {$ifdef GDB}
- { true, if the procedure is exported by an unit }
- globalsymbol : boolean;
- {$endif * GDB *}
-
- { true, if the procedure should be exported (only OS/2) }
- exported : boolean;
-
- { code for the current procedure }
- aktproccode,aktentrycode,aktexitcode : paasmoutput;
- end;
-
- var
- { info about the current sub routine }
- procinfo : tprocinfo;
-
- { Die Nummer der Label die bei BREAK bzw CONTINUE }
- { angesprungen werden sollen }
- aktbreaklabel,aktcontinuelabel : plabel;
-
- { truelabel wird angesprungen, wenn ein Ausdruck true ist, falselabel }
- { entsprechend }
- truelabel,falselabel : plabel;
-
- { Nr des Labels welches zum Verlassen eines Unterprogramm }
- { angesprungen wird }
- aktexitlabel : plabel;
-
- { also an exit label, only used we need to clear only the }
- { stack }
- aktexit2label : plabel;
-
- { only used in constructor for fail or if getmem fails }
- quickexitlabel : plabel;
-
- { this asm list contains the debug info }
- {debuginfos : paasmoutput; debuglist is enough }
-
- { Boolean, wenn eine loadn kein Assembler erzeugt hat }
- simple_loadn : boolean;
-
- { enthlt die geschtzte Durchlaufanzahl*100 fr den }
- { momentan bearbeiteten Baum }
- t_times : longint;
-
- { true, if an error while code generation occurs }
- codegenerror : boolean;
-
- { some support routines for the case instruction }
-
- { counts the labels }
- function case_count_labels(root : pcaserecord) : longint;
-
- { searches the highest label }
- function case_get_max(root : pcaserecord) : longint;
-
- { searches the lowest label }
- function case_get_min(root : pcaserecord) : longint;
-
- { concates the ASCII string to the const segment }
- procedure generate_ascii(hs : string);
-
- { inserts the ASCII string to the const segment }
- procedure generate_ascii_insert(hs : string);
-
- procedure generate_interrupt_stackframe_entry;
- procedure generate_interrupt_stackframe_exit;
-
- implementation
-
- {$ifdef i386}
- procedure generate_interrupt_stackframe_entry;
-
- begin
- { save the registers of an interrupt procedure }
- procinfo.aktentrycode^.insert(new(pai386,op_reg(A_PUSH,S_L,R_EAX)));
- procinfo.aktentrycode^.insert(new(pai386,op_reg(A_PUSH,S_L,R_EBX)));
- procinfo.aktentrycode^.insert(new(pai386,op_reg(A_PUSH,S_L,R_ECX)));
- procinfo.aktentrycode^.insert(new(pai386,op_reg(A_PUSH,S_L,R_EDX)));
- procinfo.aktentrycode^.insert(new(pai386,op_reg(A_PUSH,S_L,R_ESI)));
- procinfo.aktentrycode^.insert(new(pai386,op_reg(A_PUSH,S_L,R_EDI)));
-
- { .... also the segment registers }
- procinfo.aktentrycode^.insert(new(pai386,op_reg(A_PUSH,S_W,R_DS)));
- procinfo.aktentrycode^.insert(new(pai386,op_reg(A_PUSH,S_W,R_ES)));
- procinfo.aktentrycode^.insert(new(pai386,op_reg(A_PUSH,S_W,R_FS)));
- procinfo.aktentrycode^.insert(new(pai386,op_reg(A_PUSH,S_W,R_GS)));
- end;
-
- procedure generate_interrupt_stackframe_exit;
-
- begin
- { restore the registers of an interrupt procedure }
- { this was all with entrycode instead of exitcode !!}
- procinfo.aktexitcode^.concat(new(pai386,op_reg(A_POP,S_L,R_EAX)));
- procinfo.aktexitcode^.concat(new(pai386,op_reg(A_POP,S_L,R_EBX)));
- procinfo.aktexitcode^.concat(new(pai386,op_reg(A_POP,S_L,R_ECX)));
- procinfo.aktexitcode^.concat(new(pai386,op_reg(A_POP,S_L,R_EDX)));
- procinfo.aktexitcode^.concat(new(pai386,op_reg(A_POP,S_L,R_ESI)));
- procinfo.aktexitcode^.concat(new(pai386,op_reg(A_POP,S_L,R_EDI)));
-
- { .... also the segment registers }
- procinfo.aktexitcode^.concat(new(pai386,op_reg(A_POP,S_W,R_DS)));
- procinfo.aktexitcode^.concat(new(pai386,op_reg(A_POP,S_W,R_ES)));
- procinfo.aktexitcode^.concat(new(pai386,op_reg(A_POP,S_W,R_FS)));
- procinfo.aktexitcode^.concat(new(pai386,op_reg(A_POP,S_W,R_GS)));
-
- { this restores the flags }
- procinfo.aktexitcode^.concat(new(pai386,op_none(A_IRET,S_NO)));
- end;
- {$endif}
- {$ifdef m68k}
- procedure generate_interrupt_stackframe_entry;
- begin
- { save the registers of an interrupt procedure }
-
- { .... also the segment registers }
- end;
-
- procedure generate_interrupt_stackframe_exit;
-
- begin
- { restore the registers of an interrupt procedure }
- end;
- {$endif}
-
- procedure generate_ascii(hs : string);
-
- begin
- while length(hs)>32 do
- begin
- datasegment^.concat(new(pai_string,init(copy(hs,1,32))));
- delete(hs,1,32);
- end;
- datasegment^.concat(new(pai_string,init(hs)))
- end;
-
- procedure generate_ascii_insert(hs : string);
-
- begin
- while length(hs)>32 do
- begin
- datasegment^.insert(new(pai_string,init(copy(hs,length(hs)-32+1,length(hs)))));
- delete(hs,length(hs)-32+1,length(hs));
- end;
- datasegment^.insert(new(pai_string,init(hs)));
- end;
-
- function case_count_labels(root : pcaserecord) : longint;
-
- var
- _l : longint;
-
- procedure count(p : pcaserecord);
-
- begin
- inc(_l);
- if assigned(p^.less) then
- count(p^.less);
- if assigned(p^.greater) then
- count(p^.greater);
- end;
-
- begin
- _l:=0;
- count(root);
- case_count_labels:=_l;
- end;
-
- function case_get_max(root : pcaserecord) : longint;
-
- var
- hp : pcaserecord;
-
- begin
- hp:=root;
- while assigned(hp^.greater) do
- hp:=hp^.greater;
- case_get_max:=hp^._high;
- end;
-
- function case_get_min(root : pcaserecord) : longint;
-
- var
- hp : pcaserecord;
-
- begin
- hp:=root;
- while assigned(hp^.less) do
- hp:=hp^.less;
- case_get_min:=hp^._low;
- end;
-
- end.
-
- {
- $Log: hcodegen.pas,v $
- Revision 1.1.1.1 1998/03/25 11:18:13 root
- * Restored version
-
- Revision 1.6 1998/03/10 16:27:38 pierre
- * better line info in stabs debug
- * symtabletype and lexlevel separated into two fields of tsymtable
- + ifdef MAKELIB for direct library output, not complete
- + ifdef CHAINPROCSYMS for overloaded seach across units, not fully
- working
- + ifdef TESTFUNCRET for setting func result in underfunction, not
- working
-
- Revision 1.5 1998/03/10 01:17:19 peter
- * all files have the same header
- * messages are fully implemented, EXTDEBUG uses Comment()
- + AG... files for the Assembler generation
-
- Revision 1.4 1998/03/02 01:48:37 peter
- * renamed target_DOS to target_GO32V1
- + new verbose system, merged old errors and verbose units into one new
- verbose.pas, so errors.pas is obsolete
-
- Revision 1.3 1998/02/13 10:35:03 daniel
- * Made Motorola version compilable.
- * Fixed optimizer
-
- Revision 1.2 1998/01/16 18:03:15 florian
- * small bug fixes, some stuff of delphi styled constructores added
-
- Revision 1.1.1.1 1997/11/27 08:32:56 michael
- FPC Compiler CVS start
-
- Pre-CVS log:
-
- CEC Carl-Eric Codere
- FK Florian Klaempfl
- PM Pierre Muller
- + feature added
- - removed
- * bug fixed or changed
-
- History:
- 5th september 1997:
- + added support for MC68000 (CEC)
- 22th september 1997:
- + added tprocinfo member parent (FK)
- }
-