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{
Copyright (c) 2002 by Florian Klaempfl
Implements the PowerPC 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 nppccal;
{$i fpcdefs.inc}
interface
uses
symdef,node,ncal,ncgcal;
type
tppccallnode = class(tcgcallnode)
procedure extra_call_code;override;
procedure do_syscall;override;
end;
implementation
uses
globtype,systems,
cutils,verbose,globals,
symconst,symbase,symsym,symtable,defutil,paramgr,parabase,
cgbase,pass_2,
cpuinfo,cpubase,aasmbase,aasmtai,aasmdata,aasmcpu,
nmem,nld,ncnv,
ncgutil,cgutils,cgobj,tgobj,regvars,rgobj,rgcpu,
cg64f32,cgcpu,cpupi,procinfo;
procedure tppccallnode.extra_call_code;
begin
if assigned(varargsparas) then
begin
if (target_info.abi = abi_powerpc_sysv) then
begin
if va_uses_float_reg in varargsparas.varargsinfo then
current_asmdata.CurrAsmList.concat(taicpu.op_const_const_const(A_CREQV,6,6,6))
else
current_asmdata.CurrAsmList.concat(taicpu.op_const_const_const(A_CRXOR,6,6,6));
end;
end;
end;
procedure tppccallnode.do_syscall;
var
tmpref: treference;
begin
case target_info.system of
system_powerpc_amiga:
begin
// one syscall convention for Amiga/PowerPC
// which is very similar to basesysv on MorphOS
cg.getcpuregister(current_asmdata.CurrAsmList,NR_R0);
reference_reset_base(tmpref,NR_R3,tprocdef(procdefinition).extnumber,sizeof(pint));
current_asmdata.CurrAsmList.concat(taicpu.op_reg_ref(A_LWZ,NR_R0,tmpref));
current_asmdata.CurrAsmList.concat(taicpu.op_reg(A_MTCTR,NR_R0));
current_asmdata.CurrAsmList.concat(taicpu.op_none(A_BCTRL));
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_R0);
end;
system_powerpc_morphos:
begin
if (po_syscall_sysv in tprocdef(procdefinition).procoptions) or
(po_syscall_sysvbase in tprocdef(procdefinition).procoptions) then
begin
cg.getcpuregister(current_asmdata.CurrAsmList,NR_R0);
cg.getcpuregister(current_asmdata.CurrAsmList,NR_R12);
reference_reset(tmpref,sizeof(pint));
tmpref.symbol:=current_asmdata.RefAsmSymbol(tstaticvarsym(tprocdef(procdefinition).libsym).mangledname);
tmpref.refaddr:=addr_higha;
current_asmdata.CurrAsmList.concat(taicpu.op_reg_ref(A_LIS,NR_R12,tmpref));
tmpref.base:=NR_R12;
tmpref.refaddr:=addr_low;
current_asmdata.CurrAsmList.concat(taicpu.op_reg_ref(A_LWZ,NR_R12,tmpref));
reference_reset_base(tmpref,NR_R12,-tprocdef(procdefinition).extnumber,sizeof(pint));
current_asmdata.CurrAsmList.concat(taicpu.op_reg_ref(A_LWZ,NR_R0,tmpref));
current_asmdata.CurrAsmList.concat(taicpu.op_reg(A_MTCTR,NR_R0));
current_asmdata.CurrAsmList.concat(taicpu.op_none(A_BCTRL));
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_R12);
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_R0);
end
else if (po_syscall_basesysv in tprocdef(procdefinition).procoptions) or
(po_syscall_r12base in tprocdef(procdefinition).procoptions) then
begin
cg.getcpuregister(current_asmdata.CurrAsmList,NR_R0);
if (po_syscall_basesysv in tprocdef(procdefinition).procoptions) then
reference_reset_base(tmpref,NR_R3,-tprocdef(procdefinition).extnumber,sizeof(pint))
else
reference_reset_base(tmpref,NR_R12,-tprocdef(procdefinition).extnumber,sizeof(pint));
current_asmdata.CurrAsmList.concat(taicpu.op_reg_ref(A_LWZ,NR_R0,tmpref));
current_asmdata.CurrAsmList.concat(taicpu.op_reg(A_MTCTR,NR_R0));
current_asmdata.CurrAsmList.concat(taicpu.op_none(A_BCTRL));
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_R0);
end
else if po_syscall_legacy in tprocdef(procdefinition).procoptions then
begin
cg.getcpuregister(current_asmdata.CurrAsmList,NR_R0);
cg.getcpuregister(current_asmdata.CurrAsmList,NR_R3);
{ store call offset into R3 }
current_asmdata.CurrAsmList.concat(taicpu.op_reg_const(A_LI,NR_R3,-tprocdef(procdefinition).extnumber));
{ prepare LR, and call function }
reference_reset_base(tmpref,NR_R2,100,4); { 100 ($64) is EmulDirectCallOS offset }
current_asmdata.CurrAsmList.concat(taicpu.op_reg_ref(A_LWZ,NR_R0,tmpref));
current_asmdata.CurrAsmList.concat(taicpu.op_reg(A_MTLR,NR_R0));
current_asmdata.CurrAsmList.concat(taicpu.op_none(A_BLRL));
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_R3);
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_R0);
end
else
internalerror(2005010403);
end;
else
internalerror(2004042901);
end;
end;
begin
ccallnode:=tppccallnode;
end.
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