mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-26 16:13:48 +02:00
121 lines
3.8 KiB
ObjectPascal
121 lines
3.8 KiB
ObjectPascal
{
|
|
Copyright (c) 2002 by Florian Klaempfl
|
|
|
|
Implements the x86-64 specific part of call nodes
|
|
|
|
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 nx64cal;
|
|
|
|
{$i fpcdefs.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
symdef,
|
|
ncal,nx86cal;
|
|
|
|
type
|
|
tx8664callnode = class(tx86callnode)
|
|
protected
|
|
procedure gen_syscall_para(para: tcallparanode); override;
|
|
procedure extra_call_code;override;
|
|
procedure set_result_location(realresdef: tstoreddef);override;
|
|
public
|
|
procedure do_syscall;override;
|
|
end;
|
|
|
|
|
|
implementation
|
|
|
|
uses
|
|
globtype,
|
|
systems,verbose,cutils,
|
|
cpubase,cgbase,cgutils,cgobj,
|
|
symconst,symcpu,nld,
|
|
aasmtai,aasmdata,aasmcpu,
|
|
cpupi;
|
|
|
|
procedure tx8664callnode.do_syscall;
|
|
var
|
|
tmpref: treference;
|
|
begin
|
|
case target_info.system of
|
|
system_x86_64_aros:
|
|
begin
|
|
if ([po_syscall_baselast,po_syscall_basereg] * tprocdef(procdefinition).procoptions) <> [] then
|
|
begin
|
|
current_asmdata.CurrAsmList.concat(tai_comment.create(strpnew('AROS SysCall')));
|
|
|
|
cg.getcpuregister(current_asmdata.CurrAsmList,NR_RAX);
|
|
get_syscall_call_ref(tmpref,NR_RAX);
|
|
|
|
current_asmdata.CurrAsmList.concat(taicpu.op_ref(A_CALL,S_NO,tmpref));
|
|
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_RAX);
|
|
exit;
|
|
end;
|
|
internalerror(2016120101);
|
|
end;
|
|
else
|
|
internalerror(2015062801);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tx8664callnode.gen_syscall_para(para: tcallparanode);
|
|
begin
|
|
{ lib parameter has no special type but proccalloptions must be a syscall }
|
|
para.left:=cloadnode.create(tcpuprocdef(procdefinition).libsym,tcpuprocdef(procdefinition).libsym.owner);
|
|
end;
|
|
|
|
|
|
procedure tx8664callnode.extra_call_code;
|
|
var
|
|
mmregs : aint;
|
|
begin
|
|
{ x86_64 requires %al to contain the no. SSE regs passed }
|
|
if (cnf_uses_varargs in callnodeflags) and not x86_64_use_ms_abi(procdefinition.proccalloption) then
|
|
begin
|
|
if assigned(varargsparas) then
|
|
mmregs:=varargsparas.mmregsused
|
|
else
|
|
mmregs:=0;
|
|
current_asmdata.CurrAsmList.concat(taicpu.op_const_reg(A_MOV,S_Q,mmregs,NR_RAX))
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tx8664callnode.set_result_location(realresdef: tstoreddef);
|
|
begin
|
|
{ avoid useless "movq %xmm0,%rax" and "movq %rax,%xmm0" instructions
|
|
(which moreover for some reason are not supported by the Darwin
|
|
x86-64 assembler) }
|
|
if assigned(retloc.location) and
|
|
not assigned(retloc.location^.next) and
|
|
(retloc.location^.loc in [LOC_MMREGISTER,LOC_CMMREGISTER]) then
|
|
begin
|
|
location_reset(location,LOC_MMREGISTER,retloc.location^.size);
|
|
location.register:=cg.getmmregister(current_asmdata.CurrAsmList,retloc.location^.size);
|
|
end
|
|
else
|
|
inherited
|
|
end;
|
|
|
|
begin
|
|
ccallnode:=tx8664callnode;
|
|
end.
|