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