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{
Copyright (c) 1998-2010 by Florian Klaempfl and Jonas Maebe
Member of the Free Pascal development team
This unit contains high-level code generator support for ppc64
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit hlcgcpu;
{$i fpcdefs.inc}
interface
uses
globtype,
aasmdata,
symtype,
cgbase,cgutils,hlcgobj,hlcgppc;
type
thlcgcpu = class(thlcgppcgen)
procedure a_load_subsetreg_reg(list : TAsmList; subsetsize, tosize: tdef; const sreg: tsubsetregister; destreg: tregister); override;
procedure a_load_const_subsetreg(list: TAsmlist; tosubsetsize: tdef; a: tcgint; const sreg: tsubsetregister); override;
protected
procedure a_load_regconst_subsetreg_intern(list : TAsmList; fromsize, subsetsize: tdef; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt); override;
end;
procedure create_hlcodegen;
implementation
uses
cpubase,aasmcpu,
defutil,
cgobj,cgcpu;
{ thlcgcpu }
procedure thlcgcpu.a_load_subsetreg_reg(list: TAsmList; subsetsize, tosize: tdef; const sreg: tsubsetregister; destreg: tregister);
var
subsetcgsize: tcgsize;
begin
subsetcgsize:=def_cgsize(subsetsize);
{$ifdef extdebug}
list.concat(tai_comment.create(strpnew('a_load_subsetreg_reg subsetregsize = ' + cgsize2string(sreg.subsetregsize) + ' subsetsize = ' + cgsize2string(subsetcgsize) + ' startbit = ' + intToStr(sreg.startbit) + ' tosize = ' + cgsize2string(def_cgsize(tosize)))));
{$endif}
{ do the extraction if required and then extend the sign correctly. (The latter is actually required only for signed subsets
and if that subset is not >= the tosize). }
if (sreg.startbit<>0) or
(sreg.bitlen<>tcgsize2size[subsetcgsize]*8) then
begin
list.concat(taicpu.op_reg_reg_const_const(A_RLDICL,destreg,sreg.subsetreg,(64-sreg.startbit) and 63,64-sreg.bitlen));
if subsetcgsize in [OS_S8..OS_S128] then
if (sreg.bitlen mod 8)=0 then
begin
cg.a_load_reg_reg(list, tcgsize2unsigned[subsetcgsize],subsetcgsize,destreg,destreg);
cg.a_load_reg_reg(list,subsetcgsize,def_cgsize(tosize),destreg,destreg);
end
else
begin
cg.a_op_const_reg(list,OP_SHL,OS_INT,64-sreg.bitlen,destreg);
cg.a_op_const_reg(list,OP_SAR,OS_INT,64-sreg.bitlen,destreg);
end;
end
else
begin
cg.a_load_reg_reg(list,tcgsize2unsigned[sreg.subsetregsize],subsetcgsize,sreg.subsetreg,destreg);
cg.a_load_reg_reg(list,subsetcgsize,def_cgsize(tosize),destreg,destreg);
end;
end;
procedure thlcgcpu.a_load_const_subsetreg(list: TAsmlist; tosubsetsize: tdef; a: tcgint; const sreg: tsubsetregister);
var
tmpreg : TRegister;
begin
{$ifdef extdebug}
list.concat(tai_comment.create(strpnew('a_load_const_subsetreg subsetregsize = ' + cgsize2string(sreg.subsetregsize) + ' subsetsize = ' + cgsize2string(def_cgsize(subsetsize)) + ' startbit = ' + intToStr(sreg.startbit) + ' a = ' + intToStr(a))));
{$endif}
{ loading the constant into the lowest bits of a temp register and then inserting is
better than loading some usually large constants and do some masking and shifting on ppc64 }
tmpreg:=getintregister(list,tosubsetsize);
a_load_const_reg(list,tosubsetsize,a,tmpreg);
a_load_reg_subsetreg(list,tosubsetsize,tosubsetsize,tmpreg,sreg);
end;
procedure thlcgcpu.a_load_regconst_subsetreg_intern(list: TAsmList; fromsize, subsetsize: tdef; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt);
begin
{$ifdef extdebug}
list.concat(tai_comment.create(strpnew('a_load_reg_subsetreg fromsize = ' + cgsize2string(def_cgsize(fromsize)) + ' subsetregsize = ' + cgsize2string(sreg.subsetregsize) + ' subsetsize = ' + cgsize2string(def_cgsize(subsetsize)) + ' startbit = ' + IntToStr(sreg.startbit))));
{$endif}
if slopt in [SL_SETZERO,SL_SETMAX] then
inherited a_load_regconst_subsetreg_intern(list,fromsize,subsetsize,fromreg,sreg,slopt)
else if sreg.bitlen<>sizeof(aint)*8 then
{ simply use the INSRDI instruction }
list.concat(taicpu.op_reg_reg_const_const(A_INSRDI,sreg.subsetreg,fromreg,sreg.bitlen,(64-(sreg.startbit+sreg.bitlen)) and 63))
else
a_load_reg_reg(list,fromsize,subsetsize,fromreg,sreg.subsetreg);
end;
procedure create_hlcodegen;
begin
hlcg:=thlcgcpu.create;
create_codegen;
end;
begin
chlcgobj:=thlcgcpu;
end.
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