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{
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;
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);
else
internalerror(200402191);
end;
tg.setfirsttemp(ofs);
end
else
begin
locals := 0;
current_procinfo.procdef.localst.foreach_static(@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.
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