mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-06 14:08:02 +02:00
9de2847865
(override/adjust cgutils.use_fixed_stack to change conditions where
this is done, currently only activated for darwin-i386)
* make sure the stack is always aligned to 16 bytes on darwin-i386
git-svn-id: trunk@2840 -
98 lines
3.2 KiB
ObjectPascal
98 lines
3.2 KiB
ObjectPascal
{
|
|
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
|
|
globtype,cutils,
|
|
procinfo,cpuinfo,psub;
|
|
|
|
type
|
|
tarmprocinfo = class(tcgprocinfo)
|
|
floatregstart : aint;
|
|
// procedure handle_body_start;override;
|
|
// procedure after_pass1;override;
|
|
procedure set_first_temp_offset;override;
|
|
function calc_stackframe_size:longint;override;
|
|
end;
|
|
|
|
|
|
implementation
|
|
|
|
uses
|
|
globals,systems,
|
|
cpubase,
|
|
aasmtai,
|
|
tgobj,
|
|
symconst,symsym,paramgr,
|
|
cgbase,
|
|
cgobj;
|
|
|
|
procedure tarmprocinfo.set_first_temp_offset;
|
|
begin
|
|
{ We allocate enough space to save all registers because we can't determine
|
|
the necessary space because the used registers aren't known before
|
|
secondpass is run. Even worse, patching
|
|
the local offsets after generating the code could cause trouble because
|
|
"shifter" constants could change to non-"shifter" constants. This
|
|
is especially a problem when taking the address of a local. For now,
|
|
this extra memory should hurt less than generating all local contants with offsets
|
|
>256 as non shifter constants }
|
|
tg.setfirsttemp(-12-28);
|
|
end;
|
|
|
|
|
|
function tarmprocinfo.calc_stackframe_size:longint;
|
|
var
|
|
firstfloatreg,lastfloatreg,
|
|
r : byte;
|
|
floatsavesize : aword;
|
|
begin
|
|
maxpushedparasize:=align(maxpushedparasize,max(aktalignment.localalignmin,4));
|
|
firstfloatreg:=RS_NO;
|
|
{ save floating point registers? }
|
|
for r:=RS_F0 to RS_F7 do
|
|
if r in cg.rg[R_FPUREGISTER].used_in_proc-paramanager.get_volatile_registers_fpu(pocall_stdcall) then
|
|
begin
|
|
if firstfloatreg=RS_NO then
|
|
firstfloatreg:=r;
|
|
lastfloatreg:=r;
|
|
end;
|
|
if firstfloatreg<>RS_NO then
|
|
floatsavesize:=(lastfloatreg-firstfloatreg+1)*12
|
|
else
|
|
floatsavesize:=0;
|
|
floatsavesize:=align(floatsavesize,max(aktalignment.localalignmin,4));
|
|
result:=Align(tg.direction*tg.lasttemp,max(aktalignment.localalignmin,4))+maxpushedparasize+floatsavesize;
|
|
floatregstart:=-result+maxpushedparasize;
|
|
end;
|
|
|
|
|
|
begin
|
|
cprocinfo:=tarmprocinfo;
|
|
end.
|