mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-26 23:23:41 +02:00
69 lines
2.0 KiB
ObjectPascal
69 lines
2.0 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.
|
|
|
|
****************************************************************************
|
|
}
|
|
unit cpupi;
|
|
|
|
{$i fpcdefs.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
procinfo,
|
|
psub;
|
|
|
|
type
|
|
tcpuprocinfo=class(tcgprocinfo)
|
|
constructor create(aparent: tprocinfo); override;
|
|
procedure set_first_temp_offset; override;
|
|
end;
|
|
|
|
implementation
|
|
|
|
uses
|
|
tgobj,
|
|
cpubase;
|
|
|
|
constructor tcpuprocinfo.create(aparent: tprocinfo);
|
|
begin
|
|
inherited;
|
|
{ use the stack pointer as framepointer, because
|
|
1) we exactly know the offsets of the temps from the stack pointer
|
|
after pass 1 (based on the require parameter stack size for called
|
|
routines), while we don't know it for the frame pointer (it depends
|
|
on the number of saved registers)
|
|
2) temp offsets from the stack pointer are positive while those from
|
|
the frame pointer are negative, and we can directly encode much
|
|
bigger positive offsets in the instructions
|
|
}
|
|
framepointer:=NR_STACK_POINTER_REG;
|
|
end;
|
|
|
|
procedure tcpuprocinfo.set_first_temp_offset;
|
|
begin
|
|
{ leave room for allocated parameters }
|
|
tg.setfirsttemp(align(maxpushedparasize,16));
|
|
end;
|
|
|
|
|
|
begin
|
|
cprocinfo:=tcpuprocinfo;
|
|
end.
|