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{
Copyright (c) 2002-2006 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
psub,procinfo;
type
tx86_64procinfo = class(tcgprocinfo)
procedure set_first_temp_offset;override;
procedure generate_parameter_info;override;
function calc_stackframe_size:longint;override;
end;
implementation
uses
systems,
globtype,
globals,
cutils,
symconst,
tgobj;
procedure tx86_64procinfo.set_first_temp_offset;
begin
if target_info.system=system_x86_64_win64 then
begin
{ Fixes the case when there are calls done by low-level means
(cg.a_call_name) but no child callnode }
if (pi_do_call in flags) then
allocate_push_parasize(32);
if not(po_assembler in procdef.procoptions) and
(tg.direction > 0) then
{ maxpushedparasize already contains 32 bytes of spilling area }
tg.setfirsttemp(tg.direction*maxpushedparasize);
end
else
tg.setfirsttemp(tg.direction*maxpushedparasize);
end;
procedure tx86_64procinfo.generate_parameter_info;
begin
inherited generate_parameter_info;
if target_info.system=system_x86_64_win64 then
para_stack_size:=0;
end;
function tx86_64procinfo.calc_stackframe_size:longint;
begin
maxpushedparasize:=align(maxpushedparasize,max(current_settings.alignment.localalignmin,16));
{ Note 1: when tg.direction>0, tg.lasttemp is already offset by maxpushedparasize
(because tg.setfirsttemp also sets lasttemp)
Note 2: Align to 8 bytes here. The final 16-byte alignment is handled in
tcgx86.g_proc_entry, which considers saved rbp and the misalignment
caused by the call itself. }
if (tg.direction>0) then
result:=Align(tg.lasttemp,8)
else
result:=Align(tg.direction*tg.lasttemp+maxpushedparasize,8);
end;
begin
cprocinfo:=tx86_64procinfo;
end.
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