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https://gitlab.com/freepascal.org/fpc/source.git
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362 lines
12 KiB
ObjectPascal
362 lines
12 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 2002 by Florian Klaempfl
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Generates the argument location information for x86-64 target
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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 bymethodpointer
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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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{ Generates the argument location information for x86-64 target.
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}
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unit cpupara;
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{$i fpcdefs.inc}
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interface
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uses
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globtype,
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cpubase,cgbase,
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symconst,symbase,symtype,symdef,
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paramgr;
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type
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tx86_64paramanager = class(tparamanager)
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private
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procedure create_funcret_paraloc_info(p : tabstractprocdef; side: tcallercallee);
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public
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function getintparaloc(calloption : tproccalloption; nr : longint) : tparalocation;override;
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function get_volatile_registers_int(calloption : tproccalloption):tcpuregisterset;override;
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function get_volatile_registers_mm(calloption : tproccalloption):tcpuregisterset;override;
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function get_volatile_registers_fpu(calloption : tproccalloption):tcpuregisterset;override;
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function create_paraloc_info(p : tabstractprocdef; side: tcallercallee):longint;override;
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end;
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implementation
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uses
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cutils,verbose,
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cpuinfo,systems,
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defutil;
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const
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paraintsupregs : array[0..5] of tsuperregister = (RS_RDI,RS_RSI,RS_RDX,RS_RCX,RS_R8,RS_R9);
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parammsupregs : array[0..7] of tsuperregister = (RS_XMM0,RS_XMM1,RS_XMM2,RS_XMM3,RS_XMM4,RS_XMM5,RS_XMM6,RS_XMM7);
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procedure getvalueparaloc(p : tdef;var loc_lo,loc_hi:tcgloc);
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begin
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loc_lo:=LOC_INVALID;
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loc_hi:=LOC_INVALID;
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case p.deftype of
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orddef:
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begin
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loc_lo:=LOC_REGISTER;
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{$warning TODO 128bit also needs lochigh}
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end;
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floatdef:
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begin
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case tfloatdef(p).typ of
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s80real:
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loc_lo:=LOC_REFERENCE;
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s32real,
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s64real,
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s64comp,
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s64currency :
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loc_lo:=LOC_MMREGISTER;
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s128real:
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begin
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loc_lo:=LOC_MMREGISTER;
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loc_hi:=LOC_MMREGISTER;
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{$warning TODO float 128bit needs SSEUP lochigh}
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end;
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end;
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end;
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recorddef:
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begin
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if p.size<=16 then
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begin
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{$warning TODO location depends on the fields}
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loc_lo:=LOC_REFERENCE;
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end
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else
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loc_lo:=LOC_REFERENCE;
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end;
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objectdef:
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begin
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if is_object(p) then
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loc_lo:=LOC_REFERENCE
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else
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loc_lo:=LOC_REGISTER;
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end;
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arraydef:
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loc_lo:=LOC_REFERENCE;
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variantdef:
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loc_lo:=LOC_REFERENCE;
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stringdef:
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if is_shortstring(p) or is_longstring(p) then
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loc_lo:=LOC_REFERENCE
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else
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loc_lo:=LOC_REGISTER;
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setdef:
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if is_smallset(p) then
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loc_lo:=LOC_REGISTER
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else
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loc_lo:=LOC_REFERENCE;
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procvardef:
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begin
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{ This is a record < 16 bytes }
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if (po_methodpointer in tprocvardef(p).procoptions) then
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begin
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loc_lo:=LOC_REGISTER;
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loc_hi:=LOC_REGISTER;
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end
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else
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loc_lo:=LOC_REGISTER;
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end;
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else
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begin
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{ default for pointers,enums,etc }
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loc_lo:=LOC_REGISTER;
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end;
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end;
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end;
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function tx86_64paramanager.get_volatile_registers_int(calloption : tproccalloption):tcpuregisterset;
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begin
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result:=[RS_RAX,RS_RCX,RS_RDX,RS_RSI,RS_RDI,RS_R8,RS_R9,RS_R10,RS_R11];
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end;
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function tx86_64paramanager.get_volatile_registers_mm(calloption : tproccalloption):tcpuregisterset;
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begin
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result:=[RS_XMM0..RS_XMM15];
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end;
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function tx86_64paramanager.get_volatile_registers_fpu(calloption : tproccalloption):tcpuregisterset;
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begin
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result:=[RS_ST0..RS_ST7];
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end;
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function tx86_64paramanager.getintparaloc(calloption : tproccalloption; nr : longint): tparalocation;
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begin
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fillchar(result,sizeof(tparalocation),0);
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result.size:=OS_INT;
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if nr<1 then
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internalerror(200304303)
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else if nr<=high(paraintsupregs)+1 then
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begin
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result.loc:=LOC_REGISTER;
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result.register:=newreg(R_INTREGISTER,paraintsupregs[nr-1],R_SUBWHOLE);
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end
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else
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begin
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result.loc:=LOC_REFERENCE;
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result.reference.index:=NR_STACK_POINTER_REG;
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result.reference.offset:=(nr-6)*8;
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end;
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end;
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procedure tx86_64paramanager.create_funcret_paraloc_info(p : tabstractprocdef; side: tcallercallee);
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var
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paraloc : tparalocation;
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begin
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{ Function return }
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fillchar(paraloc,sizeof(tparalocation),0);
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paraloc.size:=def_cgsize(p.rettype.def);
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{ Return in FPU register? }
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if is_extended(p.rettype.def) then
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begin
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paraloc.loc:=LOC_FPUREGISTER;
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paraloc.register:=NR_FPU_RESULT_REG;
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end
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else
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{ Return in register? }
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if not ret_in_param(p.rettype.def,p.proccalloption) then
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begin
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paraloc.loc:=LOC_REGISTER;
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paraloc.register:=NR_FUNCTION_RETURN_REG;
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end
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else
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begin
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paraloc.loc:=LOC_REFERENCE;
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end;
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p.funcret_paraloc[side]:=paraloc;
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end;
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function tx86_64paramanager.create_paraloc_info(p : tabstractprocdef; side: tcallercallee):longint;
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var
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hp : tparaitem;
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paraloc : tparalocation;
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subreg : tsubregister;
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pushaddr : boolean;
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l,intparareg,mmparareg,
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varalign,
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paraalign,
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parasize : longint;
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begin
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intparareg:=0;
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mmparareg:=0;
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parasize:=0;
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paraalign:=get_para_align(p.proccalloption);
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{ Register parameters are assigned from left to right }
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hp:=tparaitem(p.para.first);
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while assigned(hp) do
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begin
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pushaddr:=push_addr_param(hp.paratyp,hp.paratype.def,p.proccalloption);
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if pushaddr then
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begin
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paraloc.size:=OS_ADDR;
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paraloc.loc:=LOC_REGISTER;
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paraloc.lochigh:=LOC_INVALID;
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end
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else
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begin
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paraloc.size:=def_cgsize(hp.paratype.def);
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getvalueparaloc(hp.paratype.def,paraloc.loc,paraloc.lochigh);
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end;
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paraloc.alignment:=paraalign;
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{ Location low }
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if (paraloc.loc=LOC_REGISTER) and
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(intparareg<=high(paraintsupregs)) then
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begin
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if (paraloc.size=OS_NO) or (paraloc.lochigh<>LOC_INVALID) then
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subreg:=R_SUBWHOLE
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else
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subreg:=cgsize2subreg(paraloc.size);
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paraloc.register:=newreg(R_INTREGISTER,paraintsupregs[intparareg],subreg);
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inc(intparareg);
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end
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else
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if (paraloc.loc=LOC_MMREGISTER) and
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(mmparareg<=high(parammsupregs)) then
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begin
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paraloc.register:=newreg(R_MMREGISTER,parammsupregs[mmparareg],R_SUBNONE);
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inc(mmparareg);
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end
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else
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begin
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paraloc.loc:=LOC_REFERENCE;
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paraloc.lochigh:=LOC_INVALID;
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if side=callerside then
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paraloc.reference.index:=NR_STACK_POINTER_REG
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else
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paraloc.reference.index:=NR_FRAME_POINTER_REG;
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l:=push_size(hp.paratyp,hp.paratype.def,p.proccalloption);
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varalign:=size_2_align(l);
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paraloc.reference.offset:=parasize;
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varalign:=used_align(varalign,paraalign,paraalign);
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parasize:=align(parasize+l,varalign);
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end;
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{ Location High if required }
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if (paraloc.lochigh<>LOC_INVALID) then
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begin
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if (paraloc.lochigh=LOC_REGISTER) and
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(intparareg<=high(paraintsupregs)) then
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begin
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paraloc.registerhigh:=newreg(R_INTREGISTER,paraintsupregs[intparareg],R_SUBWHOLE);
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inc(intparareg);
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end
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else
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if (paraloc.lochigh=LOC_MMREGISTER) and
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(mmparareg<=high(parammsupregs)) then
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begin
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paraloc.registerhigh:=newreg(R_MMREGISTER,parammsupregs[mmparareg],R_SUBNONE);
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inc(mmparareg);
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end
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else
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begin
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{ Release when location low has already registers
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assigned }
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if paraloc.loc=LOC_REGISTER then
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dec(intparareg);
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if paraloc.loc=LOC_MMREGISTER then
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dec(mmparareg);
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{ Overwrite with LOC_REFERENCE }
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paraloc.loc:=LOC_REFERENCE;
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paraloc.lochigh:=LOC_INVALID;
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fillchar(paraloc.reference,sizeof(paraloc.reference),0);
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if side=callerside then
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paraloc.reference.index:=NR_STACK_POINTER_REG
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else
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paraloc.reference.index:=NR_FRAME_POINTER_REG;
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l:=push_size(hp.paratyp,hp.paratype.def,p.proccalloption);
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varalign:=size_2_align(l);
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paraloc.reference.offset:=parasize;
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varalign:=used_align(varalign,paraalign,paraalign);
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parasize:=align(parasize+l,varalign);
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end;
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end;
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hp.paraloc[side]:=paraloc;
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hp:=tparaitem(hp.next);
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end;
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{ Register parameters are assigned from left-to-right, but the
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offsets on the stack are right-to-left. There is no need
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to reverse the offset, only adapt the calleeside with the
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start offset of the first param on the stack }
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if side=calleeside then
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begin
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hp:=tparaitem(p.para.first);
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while assigned(hp) do
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begin
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if (hp.paraloc[side].loc=LOC_REFERENCE) then
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inc(hp.paraloc[side].reference.offset,target_info.first_parm_offset);
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hp:=tparaitem(hp.next);
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end;
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end;
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{ Create Function result paraloc }
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create_funcret_paraloc_info(p,side);
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{ We need to return the size allocated on the stack }
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result:=parasize;
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end;
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begin
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paramanager:=tx86_64paramanager.create;
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end.
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{
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$Log$
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Revision 1.7 2004-02-04 22:01:13 peter
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* first try to get cpupara working for x86_64
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Revision 1.6 2004/01/14 23:39:05 florian
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* another bunch of x86-64 fixes mainly calling convention and
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assembler reader related
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Revision 1.5 2003/12/24 00:10:03 florian
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- delete parameter in cg64 methods removed
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Revision 1.4 2003/04/30 20:53:32 florian
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* error when address of an abstract method is taken
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* fixed some x86-64 problems
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* merged some more x86-64 and i386 code
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Revision 1.3 2002/04/25 16:12:09 florian
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* fixed more problems with cpubase and x86-64
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Revision 1.2 2003/01/05 13:36:54 florian
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* x86-64 compiles
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+ very basic support for float128 type (x86-64 only)
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Revision 1.1 2002/07/24 22:38:15 florian
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+ initial release of x86-64 target code
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}
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