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https://gitlab.com/freepascal.org/fpc/source.git
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1119 lines
49 KiB
ObjectPascal
1119 lines
49 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate assembler for 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 ncgcal;
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{$i fpcdefs.inc}
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interface
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uses
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cpubase,
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globtype,
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parabase,cgutils,
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symdef,node,ncal;
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type
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tcgcallparanode = class(tcallparanode)
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private
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tempcgpara : tcgpara;
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procedure push_addr_para;
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procedure push_value_para;
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public
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constructor create(expr,next : tnode);override;
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destructor destroy;override;
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procedure secondcallparan;override;
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end;
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tcgcallnode = class(tcallnode)
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private
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procedure release_para_temps;
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procedure pushparas;
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procedure freeparas;
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protected
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framepointer_paraloc : tcgpara;
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refcountedtemp : treference;
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procedure handle_return_value;
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{# This routine is used to push the current frame pointer
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on the stack. This is used in nested routines where the
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value of the frame pointer is always pushed as an extra
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parameter.
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The default handling is the standard handling used on
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most stack based machines, where the frame pointer is
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the first invisible parameter.
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}
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procedure pop_parasize(pop_size:longint);virtual;
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procedure extra_interrupt_code;virtual;
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procedure extra_call_code;virtual;
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procedure extra_post_call_code;virtual;
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procedure do_syscall;virtual;abstract;
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public
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procedure pass_generate_code;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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cutils,verbose,globals,
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cpuinfo,
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symconst,symtable,defutil,paramgr,
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cgbase,pass_2,
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aasmbase,aasmtai,aasmdata,
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nbas,nmem,nld,ncnv,nutils,
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{$ifdef x86}
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cga,cgx86,
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{$endif x86}
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ncgutil,
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cgobj,tgobj,
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procinfo;
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{*****************************************************************************
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TCGCALLPARANODE
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*****************************************************************************}
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constructor tcgcallparanode.create(expr,next : tnode);
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begin
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inherited create(expr,next);
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tempcgpara.init;
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end;
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destructor tcgcallparanode.destroy;
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begin
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tempcgpara.done;
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inherited destroy;
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end;
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procedure tcgcallparanode.push_addr_para;
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begin
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if not(left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) then
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internalerror(200304235);
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cg.a_paramaddr_ref(current_asmdata.CurrAsmList,left.location.reference,tempcgpara);
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end;
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procedure tcgcallparanode.push_value_para;
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{$ifdef i386}
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var
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href : treference;
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size : longint;
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{$endif i386}
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begin
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{ we've nothing to push when the size of the parameter is 0 }
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if left.resultdef.size=0 then
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exit;
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{ Move flags and jump in register to make it less complex }
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if left.location.loc in [LOC_FLAGS,LOC_JUMP,LOC_SUBSETREG,LOC_CSUBSETREG,LOC_SUBSETREF,LOC_CSUBSETREF] then
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location_force_reg(current_asmdata.CurrAsmList,left.location,def_cgsize(left.resultdef),false);
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{ Handle Floating point types differently
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This doesn't depend on emulator settings, emulator settings should
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be handled by cpupara }
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if left.resultdef.typ=floatdef then
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begin
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{$ifdef i386}
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if tempcgpara.location^.loc<>LOC_REFERENCE then
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internalerror(200309291);
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case left.location.loc of
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LOC_FPUREGISTER,
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LOC_CFPUREGISTER:
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begin
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size:=align(TCGSize2Size[left.location.size],tempcgpara.alignment);
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if tempcgpara.location^.reference.index=NR_STACK_POINTER_REG then
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begin
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cg.g_stackpointer_alloc(current_asmdata.CurrAsmList,size);
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reference_reset_base(href,NR_STACK_POINTER_REG,0);
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end
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else
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reference_reset_base(href,tempcgpara.location^.reference.index,tempcgpara.location^.reference.offset);
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cg.a_loadfpu_reg_ref(current_asmdata.CurrAsmList,left.location.size,left.location.register,href);
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end;
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LOC_MMREGISTER,
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LOC_CMMREGISTER:
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begin
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size:=align(tfloatdef(left.resultdef).size,tempcgpara.alignment);
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if tempcgpara.location^.reference.index=NR_STACK_POINTER_REG then
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begin
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cg.g_stackpointer_alloc(current_asmdata.CurrAsmList,size);
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reference_reset_base(href,NR_STACK_POINTER_REG,0);
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end
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else
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reference_reset_base(href,tempcgpara.location^.reference.index,tempcgpara.location^.reference.offset);
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cg.a_loadmm_reg_ref(current_asmdata.CurrAsmList,left.location.size,left.location.size,left.location.register,href,mms_movescalar);
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end;
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LOC_REFERENCE,
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LOC_CREFERENCE :
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begin
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size:=align(left.resultdef.size,tempcgpara.alignment);
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if (not use_fixed_stack) and
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(tempcgpara.location^.reference.index=NR_STACK_POINTER_REG) then
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cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara)
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else
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begin
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reference_reset_base(href,tempcgpara.location^.reference.index,tempcgpara.location^.reference.offset);
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cg.g_concatcopy(current_asmdata.CurrAsmList,left.location.reference,href,size);
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end;
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end;
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else
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internalerror(2002042430);
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end;
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{$else i386}
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case left.location.loc of
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LOC_MMREGISTER,
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LOC_CMMREGISTER:
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case tempcgpara.location^.loc of
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LOC_REFERENCE,
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LOC_CREFERENCE,
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LOC_MMREGISTER,
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LOC_CMMREGISTER:
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cg.a_parammm_reg(current_asmdata.CurrAsmList,left.location.size,left.location.register,tempcgpara,mms_movescalar);
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LOC_FPUREGISTER,
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LOC_CFPUREGISTER:
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begin
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location_force_fpureg(current_asmdata.CurrAsmList,left.location,false);
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cg.a_paramfpu_reg(current_asmdata.CurrAsmList,left.location.size,left.location.register,tempcgpara);
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end;
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else
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internalerror(200204249);
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end;
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LOC_FPUREGISTER,
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LOC_CFPUREGISTER:
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case tempcgpara.location^.loc of
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LOC_MMREGISTER,
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LOC_CMMREGISTER:
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begin
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location_force_mmregscalar(current_asmdata.CurrAsmList,left.location,false);
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cg.a_parammm_reg(current_asmdata.CurrAsmList,left.location.size,left.location.register,tempcgpara,mms_movescalar);
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end;
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{$ifdef x86_64}
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{ x86_64 pushes s64comp in normal register }
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LOC_REGISTER,
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LOC_CREGISTER :
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begin
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location_force_mem(current_asmdata.CurrAsmList,left.location);
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{ force integer size }
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left.location.size:=int_cgsize(tcgsize2size[left.location.size]);
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cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara);
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end;
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{$endif x86_64}
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{$ifdef powerpc}
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LOC_REGISTER,
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LOC_CREGISTER :
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begin
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{ aix abi passes floats of varargs in both fpu and }
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{ integer registers }
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location_force_mem(current_asmdata.CurrAsmList,left.location);
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{ force integer size }
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left.location.size:=int_cgsize(tcgsize2size[left.location.size]);
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if (left.location.size in [OS_32,OS_S32]) then
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cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara)
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else
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cg64.a_param64_ref(current_asmdata.CurrAsmList,left.location.reference,tempcgpara);
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end;
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{$endif powerpc}
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{$ifdef powerpc64}
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LOC_REGISTER,
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LOC_CREGISTER :
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begin
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{ ppc64 abi passes floats of varargs in integer registers, so force a store }
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location_force_mem(current_asmdata.CurrAsmList,left.location);
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{ force integer size }
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left.location.size:=int_cgsize(tcgsize2size[tempcgpara.location^.size]);
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cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara)
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end;
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{$endif powerpc64}
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{$if defined(sparc) or defined(arm)}
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{ sparc and arm pass floats in normal registers }
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LOC_REGISTER,
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LOC_CREGISTER,
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{$endif sparc}
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LOC_REFERENCE,
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LOC_CREFERENCE,
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LOC_FPUREGISTER,
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LOC_CFPUREGISTER:
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cg.a_paramfpu_reg(current_asmdata.CurrAsmList,left.location.size,left.location.register,tempcgpara);
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else
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internalerror(2002042433);
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end;
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LOC_REFERENCE,
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LOC_CREFERENCE:
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case tempcgpara.location^.loc of
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LOC_MMREGISTER,
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LOC_CMMREGISTER:
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cg.a_parammm_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara,mms_movescalar);
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{$ifdef x86_64}
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{ x86_64 pushes s64comp in normal register }
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LOC_REGISTER,
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LOC_CREGISTER :
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begin
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{ force integer size }
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left.location.size:=int_cgsize(tcgsize2size[left.location.size]);
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cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara);
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end;
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{$endif x86_64}
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{$ifdef powerpc}
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{ x86_64 pushes s64comp in normal register }
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LOC_REGISTER,
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LOC_CREGISTER :
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begin
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{ force integer size }
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left.location.size:=int_cgsize(tcgsize2size[left.location.size]);
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if (left.location.size in [OS_32,OS_S32]) then
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cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara)
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else
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cg64.a_param64_ref(current_asmdata.CurrAsmList,left.location.reference,tempcgpara);
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end;
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{$endif powerpc}
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{$ifdef powerpc64}
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LOC_REGISTER,
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LOC_CREGISTER :
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begin
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{ force integer size }
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left.location.size:=int_cgsize(tcgsize2size[tempcgpara.location^.size]);
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cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara)
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end;
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{$endif powerpc64}
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{$if defined(sparc) or defined(arm) }
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{ sparc and arm pass floats in normal registers }
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LOC_REGISTER,
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LOC_CREGISTER,
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{$endif sparc}
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LOC_REFERENCE,
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LOC_CREFERENCE,
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LOC_FPUREGISTER,
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LOC_CFPUREGISTER:
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cg.a_paramfpu_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara);
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else
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internalerror(2002042431);
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end;
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else
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internalerror(2002042432);
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end;
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{$endif i386}
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end
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else
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begin
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case left.location.loc of
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LOC_CONSTANT,
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LOC_REGISTER,
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LOC_CREGISTER,
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LOC_REFERENCE,
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LOC_CREFERENCE :
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begin
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{$ifndef cpu64bit}
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{ use cg64 only for int64, not for 8 byte records }
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if is_64bit(left.resultdef) then
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cg64.a_param64_loc(current_asmdata.CurrAsmList,left.location,tempcgpara)
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else
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{$endif cpu64bit}
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begin
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{$ifndef cpu64bit}
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{ Only a_param_ref supports multiple locations, when the
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value is still a const or in a register then write it
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to a reference first. This situation can be triggered
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by typecasting an int64 constant to a record of 8 bytes }
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if left.location.size in [OS_64,OS_S64] then
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location_force_mem(current_asmdata.CurrAsmList,left.location);
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{$endif cpu64bit}
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cg.a_param_loc(current_asmdata.CurrAsmList,left.location,tempcgpara);
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end;
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end;
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{$ifdef SUPPORT_MMX}
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LOC_MMXREGISTER,
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LOC_CMMXREGISTER:
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cg.a_parammm_reg(current_asmdata.CurrAsmList,OS_M64,left.location.register,tempcgpara,nil);
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{$endif SUPPORT_MMX}
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else
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internalerror(200204241);
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end;
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end;
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end;
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procedure tcgcallparanode.secondcallparan;
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var
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href : treference;
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otlabel,
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oflabel : tasmlabel;
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begin
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if not(assigned(parasym)) then
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internalerror(200304242);
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{ Skip nothingn nodes which are used after disabling
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a parameter }
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if (left.nodetype<>nothingn) then
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begin
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otlabel:=current_procinfo.CurrTrueLabel;
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oflabel:=current_procinfo.CurrFalseLabel;
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current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
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current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
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secondpass(left);
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maybechangeloadnodereg(current_asmdata.CurrAsmList,left,true);
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{ release memory for refcnt out parameters }
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if (parasym.varspez=vs_out) and
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(left.resultdef.needs_inittable) then
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begin
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location_get_data_ref(current_asmdata.CurrAsmList,left.location,href,false);
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cg.g_decrrefcount(current_asmdata.CurrAsmList,left.resultdef,href);
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end;
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paramanager.createtempparaloc(current_asmdata.CurrAsmList,aktcallnode.procdefinition.proccalloption,parasym,tempcgpara);
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{ handle varargs first, because parasym is not valid }
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if (cpf_varargs_para in callparaflags) then
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begin
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if paramanager.push_addr_param(vs_value,left.resultdef,
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aktcallnode.procdefinition.proccalloption) then
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push_addr_para
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else
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push_value_para;
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end
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{ hidden parameters }
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else if (vo_is_hidden_para in parasym.varoptions) then
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begin
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{ don't push a node that already generated a pointer type
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by address for implicit hidden parameters }
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if (vo_is_funcret in parasym.varoptions) or
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(not(left.resultdef.typ in [pointerdef,classrefdef]) and
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paramanager.push_addr_param(parasym.varspez,parasym.vardef,
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aktcallnode.procdefinition.proccalloption)) then
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push_addr_para
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else
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push_value_para;
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end
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{ formal def }
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else if (parasym.vardef.typ=formaldef) then
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begin
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{ allow passing of a constant to a const formaldef }
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if (parasym.varspez=vs_const) and
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(left.location.loc in [LOC_CONSTANT,LOC_REGISTER]) then
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location_force_mem(current_asmdata.CurrAsmList,left.location);
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push_addr_para;
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end
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{ Normal parameter }
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else
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begin
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{ don't push a node that already generated a pointer type
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by address for implicit hidden parameters }
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if (not(
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(vo_is_hidden_para in parasym.varoptions) and
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(left.resultdef.typ in [pointerdef,classrefdef])
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) and
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paramanager.push_addr_param(parasym.varspez,parasym.vardef,
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aktcallnode.procdefinition.proccalloption)) and
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{ dyn. arrays passed to an array of const must be passed by value, see tests/webtbs/tw4219.pp }
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not(
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is_array_of_const(parasym.vardef) and
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is_dynamic_array(left.resultdef)
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) then
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begin
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{ Passing a var parameter to a var parameter, we can
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just push the address transparently }
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if (left.nodetype=loadn) and
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(tloadnode(left).is_addr_param_load) then
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begin
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if (left.location.reference.index<>NR_NO) or
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(left.location.reference.offset<>0) then
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internalerror(200410107);
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cg.a_param_reg(current_asmdata.CurrAsmList,OS_ADDR,left.location.reference.base,tempcgpara)
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end
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else
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begin
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{ Force to be in memory }
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if not(left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) then
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location_force_mem(current_asmdata.CurrAsmList,left.location);
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push_addr_para;
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end;
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end
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else
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push_value_para;
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end;
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current_procinfo.CurrTrueLabel:=otlabel;
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current_procinfo.CurrFalseLabel:=oflabel;
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|
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{ update return location in callnode when this is the function
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result }
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if assigned(parasym) and
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(vo_is_funcret in parasym.varoptions) then
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location_copy(aktcallnode.location,left.location);
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end;
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{ next parameter }
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if assigned(right) then
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tcallparanode(right).secondcallparan;
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end;
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|
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{*****************************************************************************
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TCGCALLNODE
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*****************************************************************************}
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|
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procedure tcgcallnode.extra_interrupt_code;
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begin
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end;
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|
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procedure tcgcallnode.extra_call_code;
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begin
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end;
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|
|
|
|
|
procedure tcgcallnode.extra_post_call_code;
|
|
begin
|
|
end;
|
|
|
|
|
|
procedure tcgcallnode.pop_parasize(pop_size:longint);
|
|
begin
|
|
end;
|
|
|
|
|
|
procedure tcgcallnode.handle_return_value;
|
|
var
|
|
cgsize : tcgsize;
|
|
retloc : tlocation;
|
|
hregister : tregister;
|
|
tempnode : tnode;
|
|
begin
|
|
cgsize:=procdefinition.funcretloc[callerside].size;
|
|
|
|
{ structured results are easy to handle....
|
|
needed also when result_no_used !! }
|
|
if (procdefinition.proctypeoption<>potype_constructor) and
|
|
paramanager.ret_in_param(resultdef,procdefinition.proccalloption) then
|
|
begin
|
|
{ Location should be setup by the funcret para }
|
|
if location.loc<>LOC_REFERENCE then
|
|
internalerror(200304241);
|
|
end
|
|
else
|
|
{ ansi/widestrings must be registered, so we can dispose them }
|
|
if resultdef.needs_inittable then
|
|
begin
|
|
if procdefinition.funcretloc[callerside].loc<>LOC_REGISTER then
|
|
internalerror(200409261);
|
|
|
|
{ the FUNCTION_RESULT_REG is already allocated }
|
|
if getsupreg(procdefinition.funcretloc[callerside].register)<first_int_imreg then
|
|
cg.ungetcpuregister(current_asmdata.CurrAsmList,procdefinition.funcretloc[callerside].register);
|
|
if not assigned(funcretnode) then
|
|
begin
|
|
{ reg_ref could generate two instrcutions and allocate a register so we've to
|
|
save the result first before releasing it }
|
|
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
|
|
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,procdefinition.funcretloc[callerside].register,hregister);
|
|
|
|
location_reset(location,LOC_REFERENCE,OS_ADDR);
|
|
location.reference:=refcountedtemp;
|
|
cg.a_load_reg_ref(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,hregister,location.reference);
|
|
end
|
|
else
|
|
begin
|
|
hregister := cg.getaddressregister(current_asmdata.CurrAsmList);
|
|
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,procdefinition.funcretloc[callerside].register,hregister);
|
|
{ in case of a regular funcretnode with ret_in_param, the }
|
|
{ original funcretnode isn't touched -> make sure it's }
|
|
{ the same here (not sure if it's necessary) }
|
|
tempnode := funcretnode.getcopy;
|
|
tempnode.pass_generate_code;
|
|
location := tempnode.location;
|
|
tempnode.free;
|
|
cg.g_decrrefcount(current_asmdata.CurrAsmList,resultdef,location.reference);
|
|
cg.a_load_reg_ref(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,hregister,location.reference);
|
|
end;
|
|
end
|
|
else
|
|
{ normal (ordinal,float,pointer) result value }
|
|
begin
|
|
{ we have only to handle the result if it is used }
|
|
if (cnf_return_value_used in callnodeflags) then
|
|
begin
|
|
location.loc:=procdefinition.funcretloc[callerside].loc;
|
|
case procdefinition.funcretloc[callerside].loc of
|
|
LOC_FPUREGISTER:
|
|
begin
|
|
location_reset(location,LOC_FPUREGISTER,cgsize);
|
|
location.register:=procdefinition.funcretloc[callerside].register;
|
|
{$ifdef x86}
|
|
tcgx86(cg).inc_fpu_stack;
|
|
{$else x86}
|
|
if getsupreg(procdefinition.funcretloc[callerside].register)<first_fpu_imreg then
|
|
cg.ungetcpuregister(current_asmdata.CurrAsmList,procdefinition.funcretloc[callerside].register);
|
|
hregister:=cg.getfpuregister(current_asmdata.CurrAsmList,location.size);
|
|
cg.a_loadfpu_reg_reg(current_asmdata.CurrAsmList,location.size,location.register,hregister);
|
|
location.register:=hregister;
|
|
{$endif x86}
|
|
end;
|
|
|
|
LOC_REGISTER:
|
|
begin
|
|
if cgsize<>OS_NO then
|
|
begin
|
|
location_reset(location,LOC_REGISTER,cgsize);
|
|
{$ifndef cpu64bit}
|
|
if cgsize in [OS_64,OS_S64] then
|
|
begin
|
|
retloc:=procdefinition.funcretloc[callerside];
|
|
if retloc.loc<>LOC_REGISTER then
|
|
internalerror(200409141);
|
|
{ the function result registers are already allocated }
|
|
if getsupreg(retloc.register64.reglo)<first_int_imreg then
|
|
cg.ungetcpuregister(current_asmdata.CurrAsmList,retloc.register64.reglo);
|
|
location.register64.reglo:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
|
|
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_32,OS_32,retloc.register64.reglo,location.register64.reglo);
|
|
if getsupreg(retloc.register64.reghi)<first_int_imreg then
|
|
cg.ungetcpuregister(current_asmdata.CurrAsmList,retloc.register64.reghi);
|
|
location.register64.reghi:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
|
|
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_32,OS_32,retloc.register64.reghi,location.register64.reghi);
|
|
end
|
|
else
|
|
{$endif cpu64bit}
|
|
begin
|
|
{ change register size after the unget because the
|
|
getregister was done for the full register
|
|
def_cgsize(resultdef) is used here because
|
|
it could be a constructor call }
|
|
if getsupreg(procdefinition.funcretloc[callerside].register)<first_int_imreg then
|
|
cg.ungetcpuregister(current_asmdata.CurrAsmList,procdefinition.funcretloc[callerside].register);
|
|
location.register:=cg.getintregister(current_asmdata.CurrAsmList,def_cgsize(resultdef));
|
|
cg.a_load_reg_reg(current_asmdata.CurrAsmList,cgsize,def_cgsize(resultdef),procdefinition.funcretloc[callerside].register,location.register);
|
|
end;
|
|
{$ifdef arm}
|
|
if (resultdef.typ=floatdef) and (current_settings.fputype in [fpu_fpa,fpu_fpa10,fpu_fpa11]) then
|
|
begin
|
|
location_force_mem(current_asmdata.CurrAsmList,location);
|
|
end;
|
|
{$endif arm}
|
|
end
|
|
else
|
|
begin
|
|
if resultdef.size>0 then
|
|
internalerror(200305131);
|
|
end;
|
|
end;
|
|
|
|
LOC_MMREGISTER:
|
|
begin
|
|
location_reset(location,LOC_MMREGISTER,cgsize);
|
|
if getsupreg(procdefinition.funcretloc[callerside].register)<first_mm_imreg then
|
|
cg.ungetcpuregister(current_asmdata.CurrAsmList,procdefinition.funcretloc[callerside].register);
|
|
location.register:=cg.getmmregister(current_asmdata.CurrAsmList,cgsize);
|
|
cg.a_loadmm_reg_reg(current_asmdata.CurrAsmList,cgsize,cgsize,procdefinition.funcretloc[callerside].register,location.register,mms_movescalar);
|
|
end;
|
|
|
|
else
|
|
internalerror(200405023);
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
{$ifdef x86}
|
|
{ release FPU stack }
|
|
if procdefinition.funcretloc[callerside].loc=LOC_FPUREGISTER then
|
|
emit_reg(A_FSTP,S_NO,NR_FPU_RESULT_REG);
|
|
{$endif x86}
|
|
if cgsize<>OS_NO then
|
|
location_free(current_asmdata.CurrAsmList,procdefinition.funcretloc[callerside]);
|
|
location_reset(location,LOC_VOID,OS_NO);
|
|
end;
|
|
end;
|
|
|
|
{ When the result is not used we need to finalize the result and
|
|
can release the temp }
|
|
if not(cnf_return_value_used in callnodeflags) then
|
|
begin
|
|
if location.loc=LOC_REFERENCE then
|
|
begin
|
|
if resultdef.needs_inittable then
|
|
cg.g_finalize(current_asmdata.CurrAsmList,resultdef,location.reference);
|
|
tg.ungetiftemp(current_asmdata.CurrAsmList,location.reference)
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcgcallnode.release_para_temps;
|
|
var
|
|
hp : tnode;
|
|
ppn : tcallparanode;
|
|
begin
|
|
{ Release temps from parameters }
|
|
ppn:=tcallparanode(left);
|
|
while assigned(ppn) do
|
|
begin
|
|
if assigned(ppn.left) then
|
|
begin
|
|
{ don't release the funcret temp }
|
|
if not(assigned(ppn.parasym)) or
|
|
not(vo_is_funcret in ppn.parasym.varoptions) then
|
|
location_freetemp(current_asmdata.CurrAsmList,ppn.left.location);
|
|
{ process also all nodes of an array of const }
|
|
hp:=ppn.left;
|
|
while (hp.nodetype=typeconvn) do
|
|
hp:=ttypeconvnode(hp).left;
|
|
if (hp.nodetype=arrayconstructorn) and
|
|
assigned(tarrayconstructornode(hp).left) then
|
|
begin
|
|
while assigned(hp) do
|
|
begin
|
|
location_freetemp(current_asmdata.CurrAsmList,tarrayconstructornode(hp).left.location);
|
|
hp:=tarrayconstructornode(hp).right;
|
|
end;
|
|
end;
|
|
end;
|
|
ppn:=tcallparanode(ppn.right);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcgcallnode.pushparas;
|
|
var
|
|
ppn : tcgcallparanode;
|
|
callerparaloc,
|
|
tmpparaloc : pcgparalocation;
|
|
sizeleft: aint;
|
|
htempref,
|
|
href : treference;
|
|
begin
|
|
{ copy all resources to the allocated registers }
|
|
ppn:=tcgcallparanode(left);
|
|
while assigned(ppn) do
|
|
begin
|
|
if (ppn.left.nodetype<>nothingn) then
|
|
begin
|
|
{ better check for the real location of the parameter here, when stack passed parameters
|
|
are saved temporary in registers, checking for the tmpparaloc.loc is wrong
|
|
}
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,ppn.tempcgpara);
|
|
tmpparaloc:=ppn.tempcgpara.location;
|
|
sizeleft:=ppn.tempcgpara.intsize;
|
|
callerparaloc:=ppn.parasym.paraloc[callerside].location;
|
|
while assigned(callerparaloc) do
|
|
begin
|
|
{ Every paraloc must have a matching tmpparaloc }
|
|
if not assigned(tmpparaloc) then
|
|
internalerror(200408224);
|
|
if callerparaloc^.size<>tmpparaloc^.size then
|
|
internalerror(200408225);
|
|
case callerparaloc^.loc of
|
|
LOC_REGISTER:
|
|
begin
|
|
if tmpparaloc^.loc<>LOC_REGISTER then
|
|
internalerror(200408221);
|
|
if getsupreg(callerparaloc^.register)<first_int_imreg then
|
|
cg.getcpuregister(current_asmdata.CurrAsmList,callerparaloc^.register);
|
|
cg.a_load_reg_reg(current_asmdata.CurrAsmList,tmpparaloc^.size,tmpparaloc^.size,
|
|
tmpparaloc^.register,callerparaloc^.register);
|
|
end;
|
|
LOC_FPUREGISTER:
|
|
begin
|
|
if tmpparaloc^.loc<>LOC_FPUREGISTER then
|
|
internalerror(200408222);
|
|
if getsupreg(callerparaloc^.register)<first_fpu_imreg then
|
|
cg.getcpuregister(current_asmdata.CurrAsmList,callerparaloc^.register);
|
|
cg.a_loadfpu_reg_reg(current_asmdata.CurrAsmList,ppn.tempcgpara.size,tmpparaloc^.register,callerparaloc^.register);
|
|
end;
|
|
LOC_MMREGISTER:
|
|
begin
|
|
if tmpparaloc^.loc<>LOC_MMREGISTER then
|
|
internalerror(200408223);
|
|
if getsupreg(callerparaloc^.register)<first_mm_imreg then
|
|
cg.getcpuregister(current_asmdata.CurrAsmList,callerparaloc^.register);
|
|
cg.a_loadmm_reg_reg(current_asmdata.CurrAsmList,tmpparaloc^.size,tmpparaloc^.size,
|
|
tmpparaloc^.register,callerparaloc^.register,mms_movescalar);
|
|
end;
|
|
LOC_REFERENCE:
|
|
begin
|
|
if use_fixed_stack then
|
|
begin
|
|
{ Can't have a data copied to the stack, every location
|
|
must contain a valid size field }
|
|
|
|
if (ppn.tempcgpara.size=OS_NO) and
|
|
((tmpparaloc^.loc<>LOC_REFERENCE) or
|
|
assigned(tmpparaloc^.next)) then
|
|
internalerror(200501281);
|
|
reference_reset_base(href,callerparaloc^.reference.index,callerparaloc^.reference.offset);
|
|
{ copy parameters in case they were moved to a temp. location because we've a fixed stack }
|
|
case tmpparaloc^.loc of
|
|
LOC_REFERENCE:
|
|
begin
|
|
reference_reset_base(htempref,tmpparaloc^.reference.index,tmpparaloc^.reference.offset);
|
|
{ use concatcopy, because it can also be a float which fails when
|
|
load_ref_ref is used }
|
|
if (ppn.tempcgpara.size <> OS_NO) then
|
|
cg.g_concatcopy(current_asmdata.CurrAsmList,htempref,href,tcgsize2size[tmpparaloc^.size])
|
|
else
|
|
cg.g_concatcopy(current_asmdata.CurrAsmList,htempref,href,sizeleft)
|
|
end;
|
|
LOC_REGISTER:
|
|
cg.a_load_reg_ref(current_asmdata.CurrAsmList,tmpparaloc^.size,tmpparaloc^.size,tmpparaloc^.register,href);
|
|
LOC_FPUREGISTER:
|
|
cg.a_loadfpu_reg_ref(current_asmdata.CurrAsmList,tmpparaloc^.size,tmpparaloc^.register,href);
|
|
LOC_MMREGISTER:
|
|
cg.a_loadmm_reg_ref(current_asmdata.CurrAsmList,tmpparaloc^.size,tmpparaloc^.size,tmpparaloc^.register,href,mms_movescalar);
|
|
else
|
|
internalerror(200402081);
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
dec(sizeleft,tcgsize2size[tmpparaloc^.size]);
|
|
callerparaloc:=callerparaloc^.next;
|
|
tmpparaloc:=tmpparaloc^.next;
|
|
end;
|
|
end;
|
|
ppn:=tcgcallparanode(ppn.right);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcgcallnode.freeparas;
|
|
var
|
|
ppn : tcgcallparanode;
|
|
begin
|
|
{ free the resources allocated for the parameters }
|
|
ppn:=tcgcallparanode(left);
|
|
while assigned(ppn) do
|
|
begin
|
|
if (ppn.left.nodetype<>nothingn) then
|
|
begin
|
|
if (ppn.parasym.paraloc[callerside].location^.loc <> LOC_REFERENCE) then
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,ppn.parasym.paraloc[callerside]);
|
|
end;
|
|
ppn:=tcgcallparanode(ppn.right);
|
|
end;
|
|
end;
|
|
|
|
|
|
|
|
procedure tcgcallnode.pass_generate_code;
|
|
var
|
|
regs_to_save_int,
|
|
regs_to_save_fpu,
|
|
regs_to_save_mm : Tcpuregisterset;
|
|
href : treference;
|
|
pop_size : longint;
|
|
vmtoffset : aint;
|
|
pvreg,
|
|
vmtreg : tregister;
|
|
oldaktcallnode : tcallnode;
|
|
{$ifdef vtentry}
|
|
sym : tasmsymbol;
|
|
{$endif vtentry}
|
|
begin
|
|
if not assigned(procdefinition) or
|
|
not procdefinition.has_paraloc_info then
|
|
internalerror(200305264);
|
|
|
|
if assigned(methodpointerinit) then
|
|
secondpass(methodpointerinit);
|
|
|
|
if resultdef.needs_inittable and
|
|
not paramanager.ret_in_param(resultdef,procdefinition.proccalloption) and
|
|
not assigned(funcretnode) then
|
|
begin
|
|
tg.gettemptyped(current_asmdata.CurrAsmList,resultdef,tt_normal,refcountedtemp);
|
|
{ finalize instead of only decrref, because if the called }
|
|
{ function throws an exception this temp will be decrref'd }
|
|
{ again (tw7100) }
|
|
cg.g_finalize(current_asmdata.CurrAsmList,resultdef,refcountedtemp);
|
|
end;
|
|
|
|
regs_to_save_int:=paramanager.get_volatile_registers_int(procdefinition.proccalloption);
|
|
regs_to_save_fpu:=paramanager.get_volatile_registers_fpu(procdefinition.proccalloption);
|
|
regs_to_save_mm:=paramanager.get_volatile_registers_mm(procdefinition.proccalloption);
|
|
|
|
{ Include Function result registers }
|
|
if (not is_void(resultdef)) then
|
|
begin
|
|
case procdefinition.funcretloc[callerside].loc of
|
|
LOC_REGISTER,
|
|
LOC_CREGISTER:
|
|
include(regs_to_save_int,getsupreg(procdefinition.funcretloc[callerside].register));
|
|
LOC_FPUREGISTER,
|
|
LOC_CFPUREGISTER:
|
|
include(regs_to_save_fpu,getsupreg(procdefinition.funcretloc[callerside].register));
|
|
LOC_MMREGISTER,
|
|
LOC_CMMREGISTER:
|
|
include(regs_to_save_mm,getsupreg(procdefinition.funcretloc[callerside].register));
|
|
LOC_REFERENCE,
|
|
LOC_VOID:
|
|
;
|
|
else
|
|
internalerror(2004110213);
|
|
end;
|
|
end;
|
|
|
|
{ Process parameters, register parameters will be loaded
|
|
in imaginary registers. The actual load to the correct
|
|
register is done just before the call }
|
|
oldaktcallnode:=aktcallnode;
|
|
aktcallnode:=self;
|
|
if assigned(left) then
|
|
tcallparanode(left).secondcallparan;
|
|
aktcallnode:=oldaktcallnode;
|
|
|
|
{ procedure variable or normal function call ? }
|
|
if (right=nil) then
|
|
begin
|
|
{ When methodpointer is typen we don't need (and can't) load
|
|
a pointer. We can directly call the correct procdef (PFV) }
|
|
if (po_virtualmethod in procdefinition.procoptions) and
|
|
assigned(methodpointer) and
|
|
(methodpointer.nodetype<>typen) then
|
|
begin
|
|
{ virtual methods require an index }
|
|
if tprocdef(procdefinition).extnumber=$ffff then
|
|
internalerror(200304021);
|
|
|
|
secondpass(methodpointer);
|
|
|
|
{ Load VMT from self }
|
|
if methodpointer.resultdef.typ=objectdef then
|
|
gen_load_vmt_register(current_asmdata.CurrAsmList,tobjectdef(methodpointer.resultdef),methodpointer.location,vmtreg)
|
|
else
|
|
begin
|
|
{ Load VMT value in register }
|
|
location_force_reg(current_asmdata.CurrAsmList,methodpointer.location,OS_ADDR,false);
|
|
vmtreg:=methodpointer.location.register;
|
|
end;
|
|
|
|
{ test validity of VMT }
|
|
if not(is_interface(tprocdef(procdefinition)._class)) and
|
|
not(is_cppclass(tprocdef(procdefinition)._class)) then
|
|
cg.g_maybe_testvmt(current_asmdata.CurrAsmList,vmtreg,tprocdef(procdefinition)._class);
|
|
|
|
{ Call through VMT, generate a VTREF symbol to notify the linker }
|
|
vmtoffset:=tprocdef(procdefinition)._class.vmtmethodoffset(tprocdef(procdefinition).extnumber);
|
|
{$ifdef vtentry}
|
|
if not is_interface(tprocdef(procdefinition)._class) then
|
|
begin
|
|
inc(current_asmdata.NextVTEntryNr);
|
|
current_asmdata.CurrAsmList.Concat(tai_symbol.CreateName('VTREF'+tostr(current_asmdata.NextVTEntryNr)+'_'+tprocdef(procdefinition)._class.vmt_mangledname+'$$'+tostr(vmtoffset div sizeof(aint)),AT_FUNCTION,0));
|
|
end;
|
|
{$endif vtentry}
|
|
|
|
{$ifndef x86}
|
|
pvreg:=cg.getintregister(current_asmdata.CurrAsmList,OS_ADDR);
|
|
{$endif not x86}
|
|
reference_reset_base(href,vmtreg,vmtoffset);
|
|
{$ifndef x86}
|
|
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,href,pvreg);
|
|
{$endif not x86}
|
|
|
|
{ Load parameters that are in temporary registers in the
|
|
correct parameter register }
|
|
if assigned(left) then
|
|
begin
|
|
pushparas;
|
|
{ free the resources allocated for the parameters }
|
|
freeparas;
|
|
end;
|
|
|
|
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_INTREGISTER,regs_to_save_int);
|
|
if cg.uses_registers(R_FPUREGISTER) then
|
|
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_FPUREGISTER,regs_to_save_fpu);
|
|
if cg.uses_registers(R_MMREGISTER) then
|
|
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_MMREGISTER,regs_to_save_mm);
|
|
|
|
{ call method }
|
|
extra_call_code;
|
|
{$ifdef x86}
|
|
cg.a_call_ref(current_asmdata.CurrAsmList,href);
|
|
{$else x86}
|
|
cg.a_call_reg(current_asmdata.CurrAsmList,pvreg);
|
|
{$endif x86}
|
|
extra_post_call_code;
|
|
end
|
|
else
|
|
begin
|
|
{ Load parameters that are in temporary registers in the
|
|
correct parameter register }
|
|
if assigned(left) then
|
|
begin
|
|
pushparas;
|
|
{ free the resources allocated for the parameters }
|
|
freeparas;
|
|
end;
|
|
|
|
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_INTREGISTER,regs_to_save_int);
|
|
if cg.uses_registers(R_FPUREGISTER) then
|
|
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_FPUREGISTER,regs_to_save_fpu);
|
|
if cg.uses_registers(R_MMREGISTER) then
|
|
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_MMREGISTER,regs_to_save_mm);
|
|
|
|
if procdefinition.proccalloption=pocall_syscall then
|
|
do_syscall
|
|
else
|
|
begin
|
|
{ Calling interrupt from the same code requires some
|
|
extra code }
|
|
if (po_interrupt in procdefinition.procoptions) then
|
|
extra_interrupt_code;
|
|
extra_call_code;
|
|
cg.a_call_name(current_asmdata.CurrAsmList,tprocdef(procdefinition).mangledname);
|
|
extra_post_call_code;
|
|
end;
|
|
end;
|
|
end
|
|
else
|
|
{ now procedure variable case }
|
|
begin
|
|
secondpass(right);
|
|
|
|
pvreg:=cg.getintregister(current_asmdata.CurrAsmList,OS_ADDR);
|
|
{ Only load OS_ADDR from the reference }
|
|
if right.location.loc in [LOC_REFERENCE,LOC_CREFERENCE] then
|
|
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,right.location.reference,pvreg)
|
|
else
|
|
cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_ADDR,right.location,pvreg);
|
|
location_freetemp(current_asmdata.CurrAsmList,right.location);
|
|
|
|
{ Load parameters that are in temporary registers in the
|
|
correct parameter register }
|
|
if assigned(left) then
|
|
begin
|
|
pushparas;
|
|
{ free the resources allocated for the parameters }
|
|
freeparas;
|
|
end;
|
|
|
|
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_INTREGISTER,regs_to_save_int);
|
|
if cg.uses_registers(R_FPUREGISTER) then
|
|
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_FPUREGISTER,regs_to_save_fpu);
|
|
if cg.uses_registers(R_MMREGISTER) then
|
|
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_MMREGISTER,regs_to_save_mm);
|
|
|
|
{ Calling interrupt from the same code requires some
|
|
extra code }
|
|
if (po_interrupt in procdefinition.procoptions) then
|
|
extra_interrupt_code;
|
|
extra_call_code;
|
|
cg.a_call_reg(current_asmdata.CurrAsmList,pvreg);
|
|
extra_post_call_code;
|
|
end;
|
|
|
|
{ Need to remove the parameters from the stack? }
|
|
if (procdefinition.proccalloption in clearstack_pocalls) then
|
|
begin
|
|
pop_size:=pushedparasize;
|
|
{ for Cdecl functions we don't need to pop the funcret when it
|
|
was pushed by para }
|
|
if paramanager.ret_in_param(procdefinition.returndef,procdefinition.proccalloption) then
|
|
dec(pop_size,sizeof(aint));
|
|
{ Remove parameters/alignment from the stack }
|
|
pop_parasize(pop_size);
|
|
end;
|
|
|
|
{ Release registers, but not the registers that contain the
|
|
function result }
|
|
if (not is_void(resultdef)) then
|
|
begin
|
|
case procdefinition.funcretloc[callerside].loc of
|
|
LOC_REGISTER,
|
|
LOC_CREGISTER:
|
|
begin
|
|
{$ifndef cpu64bit}
|
|
if procdefinition.funcretloc[callerside].size in [OS_64,OS_S64] then
|
|
begin
|
|
exclude(regs_to_save_int,getsupreg(procdefinition.funcretloc[callerside].register64.reghi));
|
|
exclude(regs_to_save_int,getsupreg(procdefinition.funcretloc[callerside].register64.reglo));
|
|
end
|
|
else
|
|
{$endif cpu64bit}
|
|
exclude(regs_to_save_int,getsupreg(procdefinition.funcretloc[callerside].register));
|
|
end;
|
|
LOC_FPUREGISTER,
|
|
LOC_CFPUREGISTER:
|
|
exclude(regs_to_save_fpu,getsupreg(procdefinition.funcretloc[callerside].register));
|
|
LOC_MMREGISTER,
|
|
LOC_CMMREGISTER:
|
|
exclude(regs_to_save_mm,getsupreg(procdefinition.funcretloc[callerside].register));
|
|
LOC_REFERENCE,
|
|
LOC_VOID:
|
|
;
|
|
else
|
|
internalerror(2004110214);
|
|
end;
|
|
end;
|
|
|
|
{$if defined(x86) or defined(arm)}
|
|
if procdefinition.proccalloption=pocall_safecall then
|
|
begin
|
|
{$ifdef x86_64}
|
|
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,NR_RAX,NR_RCX);
|
|
{$endif x86_64}
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_SAFECALLCHECK');
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
end;
|
|
{$endif}
|
|
|
|
if cg.uses_registers(R_MMREGISTER) then
|
|
cg.dealloccpuregisters(current_asmdata.CurrAsmList,R_MMREGISTER,regs_to_save_mm);
|
|
if cg.uses_registers(R_FPUREGISTER) then
|
|
cg.dealloccpuregisters(current_asmdata.CurrAsmList,R_FPUREGISTER,regs_to_save_fpu);
|
|
cg.dealloccpuregisters(current_asmdata.CurrAsmList,R_INTREGISTER,regs_to_save_int);
|
|
|
|
{ handle function results }
|
|
if (not is_void(resultdef)) then
|
|
handle_return_value
|
|
else
|
|
location_reset(location,LOC_VOID,OS_NO);
|
|
|
|
{ perhaps i/o check ? }
|
|
if (cs_check_io in current_settings.localswitches) and
|
|
(po_iocheck in procdefinition.procoptions) and
|
|
not(po_iocheck in current_procinfo.procdef.procoptions) and
|
|
{ no IO check for methods and procedure variables }
|
|
(right=nil) and
|
|
not(po_virtualmethod in procdefinition.procoptions) then
|
|
begin
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_IOCHECK');
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
end;
|
|
|
|
{ release temps of paras }
|
|
release_para_temps;
|
|
|
|
|
|
if assigned(methodpointerdone) then
|
|
secondpass(methodpointerdone);
|
|
end;
|
|
|
|
|
|
begin
|
|
ccallparanode:=tcgcallparanode;
|
|
ccallnode:=tcgcallnode;
|
|
end.
|