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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 ppc32
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
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_subsetreg_subsetreg(list: TAsmlist; fromsubsetsize, tosubsetsize: tdef; const fromsreg, tosreg: tsubsetregister); override;
protected
procedure a_load_regconst_subsetreg_intern(list: TAsmList; fromsize, subsetsize: tdef; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt); override;
end;
implementation
uses
verbose,
cpubase,aasmcpu,
defutil,
cgobj,cgcpu;
{ thlcgppc }
procedure thlcgcpu.a_load_subsetreg_reg(list: TAsmList; subsetsize, tosize: tdef; const sreg: tsubsetregister; destreg: tregister);
var
cgsubsetsize,
cgtosize: tcgsize;
begin
if (sreg.bitlen > 32) then
internalerror(2008020701);
cgsubsetsize:=def_cgsize(subsetsize);
cgtosize:=def_cgsize(tosize);
if (sreg.bitlen <> 32) then
begin
list.concat(taicpu.op_reg_reg_const_const_const(A_RLWINM,destreg,
sreg.subsetreg,(32-sreg.startbit) and 31,32-sreg.bitlen,31));
{ types with a negative lower bound are always a base type (8, 16, 32 bits) }
if (cgsubsetsize in [OS_S8..OS_S128]) then
if ((sreg.bitlen mod 8) = 0) then
begin
cg.a_load_reg_reg(list,tcgsize2unsigned[cgsubsetsize],cgsubsetsize,destreg,destreg);
cg.a_load_reg_reg(list,cgsubsetsize,cgtosize,destreg,destreg);
end
else
begin
cg.a_op_const_reg(list,OP_SHL,OS_INT,32-sreg.bitlen,destreg);
cg.a_op_const_reg(list,OP_SAR,OS_INT,32-sreg.bitlen,destreg);
end;
end
else
cg.a_load_reg_reg(list,cgsubsetsize,cgtosize,sreg.subsetreg,destreg);
end;
procedure thlcgcpu.a_load_subsetreg_subsetreg(list: TAsmlist; fromsubsetsize, tosubsetsize: tdef; const fromsreg, tosreg: tsubsetregister);
begin
if (tosreg.bitlen>32) or (tosreg.startbit>31) then
internalerror(2008020703);
if (fromsreg.bitlen>=tosreg.bitlen) then
list.concat(taicpu.op_reg_reg_const_const_const(A_RLWIMI,tosreg.subsetreg, fromsreg.subsetreg,
(tosreg.startbit-fromsreg.startbit) and 31,
32-tosreg.startbit-tosreg.bitlen,31-tosreg.startbit))
else
inherited a_load_subsetreg_subsetreg(list,fromsubsetsize,tosubsetsize,fromsreg,tosreg);
end;
procedure thlcgcpu.a_load_regconst_subsetreg_intern(list: TAsmList; fromsize, subsetsize: tdef; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt);
begin
if (slopt in [SL_SETZERO,SL_SETMAX]) then
inherited a_load_regconst_subsetreg_intern(list,fromsize,subsetsize,fromreg,sreg,slopt)
else if (sreg.bitlen>32) then
internalerror(2008020702)
else if (sreg.bitlen<>32) then
list.concat(taicpu.op_reg_reg_const_const_const(A_RLWIMI,sreg.subsetreg,fromreg,
sreg.startbit,32-sreg.startbit-sreg.bitlen,31-sreg.startbit))
else
cg.a_load_reg_reg(list,def_cgsize(fromsize),def_cgsize(subsetsize),fromreg,sreg.subsetreg);
end;
procedure create_hlcodegen_cpu;
begin
hlcg:=thlcgcpu.create;
create_codegen;
end;
begin
chlcgobj:=thlcgcpu;
create_hlcodegen:=@create_hlcodegen_cpu;
end.
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