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b7da785688
* Parameter offsets are now calculated similar to other targets, target_info,first_parm_offset is applied only to callee side, while at caller side offsets start from 0. * For cdecl procedures, parameters are removed by caller, for the rest it's still done by callee (resembles i386 target, except there is no 'register' calling convention). git-svn-id: trunk@28185 -
97 lines
3.1 KiB
ObjectPascal
97 lines
3.1 KiB
ObjectPascal
{
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Copyright (c) 2002 by Florian Klaempfl
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Implements the M68K specific part of call nodes
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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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unit n68kcal;
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{$i fpcdefs.inc}
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interface
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uses
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symdef,node,ncal,ncgcal;
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type
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tm68kcallnode = class(tcgcallnode)
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protected
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procedure gen_syscall_para(para: tcallparanode); override;
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public
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procedure do_syscall;override;
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procedure pop_parasize(pop_size: longint);override;
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end;
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implementation
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uses
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globtype,systems,
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cutils,verbose,globals,
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symconst,symbase,symsym,symcpu,symtable,defutil,paramgr,parabase,
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cgbase,pass_2,
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cpuinfo,cpubase,aasmbase,aasmtai,aasmdata,aasmcpu,
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nmem,nld,ncnv,
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ncgutil,cgutils,cgobj,tgobj,regvars,rgobj,rgcpu,
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cg64f32,cgcpu,cpupi,procinfo;
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procedure tm68kcallnode.pop_parasize(pop_size: longint);
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begin
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if pop_size<>0 then
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current_asmdata.CurrAsmList.concat(taicpu.op_const_reg(A_ADD,S_L,pop_size,NR_SP));
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end;
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procedure tm68kcallnode.gen_syscall_para(para: tcallparanode);
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begin
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{ lib parameter has no special type but proccalloptions must be a syscall }
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para.left:=cloadnode.create(tcpuprocdef(procdefinition).libsym,tcpuprocdef(procdefinition).libsym.owner);
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end;
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procedure tm68kcallnode.do_syscall;
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var
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tmpref: treference;
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begin
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case target_info.system of
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system_m68k_amiga:
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begin
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if po_syscall_legacy in tprocdef(procdefinition).procoptions then
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begin
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{ according to Amiga Developer CD 2.1, system functions destroy the
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scratch regs D0-D1 and A0-A1, but preserve all other regs. A6 is
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not used as FP on Amiga any more (we use A5), so we don't need to
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save it. (KB)
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http://amigadev.elowar.com/read/ADCD_2.1/Libraries_Manual_guide/node0290.html }
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reference_reset_base(tmpref,NR_A6,-tprocdef(procdefinition).extnumber,4);
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current_asmdata.CurrAsmList.concat(taicpu.op_ref(A_JSR,S_NO,tmpref));
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end
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else
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internalerror(2005010403);
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end;
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else
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internalerror(2004042901);
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end;
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end;
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begin
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ccallnode:=tm68kcallnode;
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end.
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