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fpc/compiler/powerpc/cpupi.pas
Jonas Maebe 92f038ebec * fixed saving/restoring of volatile fpu registers under sysv 
+ better provisions for abi differences regarding fpu registers that have
    to be saved
2003-12-29 14:17:50 +00:00

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{
$Id$
Copyright (c) 2002 by Florian Klaempfl
This unit contains the CPU specific part of tprocinfo
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.
****************************************************************************
}
{ This unit contains the CPU specific part of tprocinfo. }
unit cpupi;
{$i fpcdefs.inc}
interface
uses
cutils,
procinfo,cpuinfo,psub;
type
tppcprocinfo = class(tcgprocinfo)
{ offset where the frame pointer from the outer procedure is stored. }
parent_framepointer_offset : longint;
{ max. of space need for parameters, currently used by the PowerPC port only }
maxpushedparasize : aword;
constructor create(aparent:tprocinfo);override;
procedure set_first_temp_offset;override;
procedure allocate_push_parasize(size: longint);override;
function calc_stackframe_size:longint;override;
end;
implementation
uses
globtype,globals,systems,
cpubase,
aasmtai,
tgobj,
symconst,symsym,paramgr,symutil,
verbose;
constructor tppcprocinfo.create(aparent:tprocinfo);
begin
inherited create(aparent);
maxpushedparasize:=0;
end;
procedure tppcprocinfo.set_first_temp_offset;
var
ofs : aword;
locals: longint;
begin
if not(po_assembler in procdef.procoptions) then
begin
case target_info.abi of
abi_powerpc_aix:
ofs:=align(maxpushedparasize+LinkageAreaSizeAIX,16);
abi_powerpc_sysv:
ofs:=align(maxpushedparasize+LinkageAreaSizeSYSV,16);
end;
tg.setfirsttemp(ofs);
end
else
begin
locals := 0;
current_procinfo.procdef.localst.foreach_static({$ifdef FPCPROCVAR}@{$endif}count_locals,@locals);
if locals <> 0 then
{ at 0(r1), the previous value of r1 will be stored }
tg.setfirsttemp(4);
end;
end;
(*
procedure tppcprocinfo.after_pass1;
begin
if not(po_assembler in procdef.procoptions) then
begin
if cs_asm_source in aktglobalswitches then
aktproccode.insert(Tai_comment.Create(strpnew('Parameter copies start at: r1+'+tostr(procdef.parast.address_fixup))));
if cs_asm_source in aktglobalswitches then
aktproccode.insert(Tai_comment.Create(strpnew('Locals start at: r1+'+tostr(procdef.localst.address_fixup))));
firsttemp_offset:=align(procdef.localst.address_fixup+procdef.localst.datasize,16);
if cs_asm_source in aktglobalswitches then
aktproccode.insert(Tai_comment.Create(strpnew('Temp. space start: r1+'+tostr(firsttemp_offset))));
//!!!! tg.setfirsttemp(firsttemp_offset);
tg.firsttemp:=firsttemp_offset;
tg.lasttemp:=firsttemp_offset;
inherited after_pass1;
end;
end;
*)
procedure tppcprocinfo.allocate_push_parasize(size:longint);
begin
if size>maxpushedparasize then
maxpushedparasize:=size;
end;
function tppcprocinfo.calc_stackframe_size:longint;
var
first_save_fpu_register: longint;
begin
{ more or less copied from cgcpu.pas/g_stackframe_entry }
{ FIXME: has to be R_F14 instad of R_F8 for SYSV-64bit }
case target_info.abi of
abi_powerpc_aix:
first_save_fpu_register := 14;
abi_powerpc_sysv:
first_save_fpu_register := 9;
else
internalerror(2003122903);
end;
if not (po_assembler in procdef.procoptions) then
result := align(align((31-13+1)*4+(31-first_save_fpu_register+1)*8,16)+tg.lasttemp,16)
else
result := align(tg.lasttemp,16);
end;
begin
cprocinfo:=tppcprocinfo;
end.
{
$Log$
Revision 1.33 2003-12-29 14:17:50 jonas
* fixed saving/restoring of volatile fpu registers under sysv
+ better provisions for abi differences regarding fpu registers that have
to be saved
Revision 1.32 2003/12/07 16:40:45 jonas
* moved count_locals from pstatmnt to symutils
* use count_locals in powerpc/cpupi to check whether we should set the
first temp offset (and as such generate a stackframe)
Revision 1.31 2003/11/29 22:54:32 jonas
* more ppc fixes, hello world works again under linuxppc
Revision 1.30 2003/11/29 16:27:19 jonas
* fixed several ppc assembler reader related problems
* local vars in assembler procedures now start at offset 4
* fixed second_int_to_bool (apparently an integer can be in LOC_JUMP??)
Revision 1.29 2003/10/01 20:34:49 peter
* procinfo unit contains tprocinfo
* cginfo renamed to cgbase
* moved cgmessage to verbose
* fixed ppc and sparc compiles
Revision 1.28 2003/09/28 17:55:04 peter
* parent framepointer changed to hidden parameter
* tloadparentfpnode added
Revision 1.27 2003/08/18 11:51:19 olle
+ cleaning up in proc entry and exit, now calc_stack_frame always is used.
Revision 1.26 2003/08/16 14:26:44 jonas
* set correct localsymtable fixup already in handle_body_start instead
of in after_pass1, as it's necessary to get the correct offsets for
the calleeside paralocs (and those are now setup in the generic
handle_body_start)
Revision 1.25 2003/08/08 15:52:50 olle
* merged macos entry/exit code generation into the general one.
Revision 1.24 2003/07/06 20:25:03 jonas
* fixed ppc compiler
Revision 1.23 2003/06/13 21:19:32 peter
* current_procdef removed, use current_procinfo.procdef instead
Revision 1.22 2003/06/02 21:42:05 jonas
* function results can now also be regvars
- removed tprocinfo.return_offset, never use it again since it's invalid
if the result is a regvar
Revision 1.21 2003/05/24 11:47:27 jonas
* fixed framepointer storage: it's now always stored at r1+12, which is
a place in the link area reserved for compiler use.
Revision 1.20 2003/05/23 18:51:26 jonas
* fixed support for nested procedures and more parameters than those
which fit in registers (untested/probably not working: calling a
nested procedure from a deeper nested procedure)
Revision 1.19 2003/05/22 21:34:11 peter
* inherite from tcgprocinfo
Revision 1.18 2003/05/17 14:05:30 jonas
* fixed para/localst calculations (note to self: don't commit at
extremely late/early hours :)
Revision 1.17 2003/05/16 23:15:51 jonas
* workaround for nested procedures until Peter fixes it properly :)
Revision 1.16 2003/05/16 20:00:39 jonas
* powerpc nested procedure fixes, should work completely now if all
local variables of the parent procedure are declared before the
nested procedures are declared
Revision 1.15 2003/05/15 19:39:09 florian
* fixed ppc compiler which was broken by Peter's changes
Revision 1.14 2003/05/10 23:57:23 florian
* vmtpointer_offset must be adjusted in after_pass1 as well
Revision 1.13 2003/05/09 19:00:30 jonas
* call inherited after_header as well
Revision 1.12 2003/04/27 11:21:36 peter
* aktprocdef renamed to current_procinfo.procdef
* procinfo renamed to current_procinfo
* procinfo will now be stored in current_module so it can be
cleaned up properly
* gen_main_procsym changed to create_main_proc and release_main_proc
to also generate a tprocinfo structure
* fixed unit implicit initfinal
Revision 1.11 2003/04/27 07:48:05 peter
* updated for removed lexlevel
Revision 1.10 2003/04/26 11:31:00 florian
* fixed the powerpc to work with the new function result handling
Revision 1.9 2003/04/24 11:24:00 florian
* fixed several issues with nested procedures
Revision 1.8 2003/04/06 16:39:11 jonas
* don't generate entry/exit code for assembler procedures
Revision 1.7 2003/04/05 21:09:32 jonas
* several ppc/generic result offset related fixes. The "normal" result
offset seems now to be calculated correctly and a lot of duplicate
calculations have been removed. Nested functions accessing the parent's
function result don't work at all though :(
Revision 1.6 2002/12/15 19:22:01 florian
* fixed some crashes and a rte 201
Revision 1.5 2002/11/18 17:32:01 peter
* pass proccalloption to ret_in_xxx and push_xxx functions
Revision 1.4 2002/09/10 20:30:42 florian
* fixed offset calculation for symtables etc.
Revision 1.3 2002/09/07 17:54:59 florian
* first part of PowerPC fixes
Revision 1.2 2002/08/18 20:06:30 peter
* inlining is now also allowed in interface
* renamed write/load to ppuwrite/ppuload
* tnode storing in ppu
* nld,ncon,nbas are already updated for storing in ppu
Revision 1.1 2002/08/17 09:23:49 florian
* first part of procinfo rewrite
}
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