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110 lines
3.1 KiB
ObjectPascal
110 lines
3.1 KiB
ObjectPascal
{
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Copyright (c) 2002 by Florian Klaempfl
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This unit contains the CPU specific part of tprocinfo
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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{ This unit contains the CPU specific part of tprocinfo. }
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unit cpupi;
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{$I fpcdefs.inc}
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interface
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uses
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cutils,
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procinfo, cpuinfo, psub;
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type
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tppcprocinfo = class(tcgprocinfo)
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{ offset where the frame pointer from the outer procedure is stored. }
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parent_framepointer_offset: longint;
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constructor create(aparent: tprocinfo); override;
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procedure set_first_temp_offset; override;
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procedure allocate_push_parasize(size: longint); override;
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function calc_stackframe_size: longint; override;
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function calc_stackframe_size(numgpr, numfpr : longint): longint;
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end;
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implementation
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uses
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globtype, globals, systems,
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cpubase, cgbase,
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aasmtai,
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tgobj,
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symconst, symsym, paramgr, symutil,
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verbose;
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constructor tppcprocinfo.create(aparent: tprocinfo);
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begin
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inherited create(aparent);
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maxpushedparasize := 0;
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end;
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procedure tppcprocinfo.set_first_temp_offset;
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var
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ofs: aword;
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locals: longint;
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begin
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if not (po_assembler in procdef.procoptions) then begin
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{ always allocate space for 8 * 8 bytes for registers R3-R10 and stack header if
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there's a stack frame }
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if (maxpushedparasize < 64) then begin
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maxpushedparasize := 64;
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end;
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ofs := align(maxpushedparasize + LinkageAreaSizeELF, ELF_STACK_ALIGN);
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tg.setfirsttemp(ofs);
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end else begin
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locals := 0;
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current_procinfo.procdef.localst.foreach_static(@count_locals, @locals);
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if locals <> 0 then
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{ at 0(r1), the previous value of r1 will be stored }
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tg.setfirsttemp(8);
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end;
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end;
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procedure tppcprocinfo.allocate_push_parasize(size: longint);
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begin
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if size > maxpushedparasize then
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maxpushedparasize := size;
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end;
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function tppcprocinfo.calc_stackframe_size: longint;
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begin
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calc_stackframe_size(18, 18);
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end;
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function tppcprocinfo.calc_stackframe_size(numgpr, numfpr : longint) : longint;
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begin
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{ more or less copied from cgcpu.pas/g_stackframe_entry }
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if not (po_assembler in procdef.procoptions) then begin
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// no VMX support
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result := align(align(numgpr * tcgsize2size[OS_INT] +
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numfpr * tcgsize2size[OS_FLOAT], ELF_STACK_ALIGN) + tg.lasttemp, ELF_STACK_ALIGN);
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end else
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result := align(tg.lasttemp, ELF_STACK_ALIGN);
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end;
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begin
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cprocinfo := tppcprocinfo;
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end.
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