mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-06-03 07:18:47 +02:00
2e131baa4c
are not a multiple of 8 bits, nor necessarily aligned at a
multiple of 8 bits). Supports both constant and variable bit
indices.
git-svn-id: trunk@4443 -
89 lines
3.0 KiB
ObjectPascal
89 lines
3.0 KiB
ObjectPascal
{
|
|
Copyright (c) 2006 by Florian Klaempfl
|
|
|
|
This unit implements the common part of the code generator for the PowerPC
|
|
|
|
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 cgppc;
|
|
|
|
{$i fpcdefs.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
globtype,symtype,symdef,
|
|
cgbase,cgobj,
|
|
aasmbase,aasmcpu,aasmtai,aasmdata,
|
|
cpubase,cpuinfo,cgutils,rgcpu;
|
|
|
|
type
|
|
tcgppcgen = class(tcg)
|
|
procedure a_call_ref(list : TAsmList;ref: treference); override;
|
|
protected
|
|
procedure a_load_subsetref_regs_noindex(list: TAsmList; subsetsize: tcgsize; loadbitsize: byte; const sref: tsubsetreference; valuereg, extra_value_reg: tregister); override;
|
|
end;
|
|
|
|
implementation
|
|
|
|
uses
|
|
globals,verbose,systems,cutils,
|
|
symconst,symsym,fmodule,
|
|
rgobj,tgobj,cpupi,procinfo,paramgr;
|
|
|
|
procedure tcgppcgen.a_call_ref(list : TAsmList;ref: treference);
|
|
var
|
|
tempreg : TRegister;
|
|
begin
|
|
tempreg := getintregister(list, OS_ADDR);
|
|
a_load_ref_reg(list,OS_ADDR,OS_ADDR,ref,tempreg);
|
|
a_call_reg(list,tempreg);
|
|
end;
|
|
|
|
|
|
procedure tcgppcgen.a_load_subsetref_regs_noindex(list: TAsmList; subsetsize: tcgsize; loadbitsize: byte; const sref: tsubsetreference; valuereg, extra_value_reg: tregister);
|
|
var
|
|
fromsreg, tosreg: tsubsetregister;
|
|
restbits: byte;
|
|
begin
|
|
restbits := (sref.bitlen - (loadbitsize - sref.startbit));
|
|
a_op_const_reg(list,OP_SHL,OS_INT,restbits,valuereg);
|
|
{ mask other bits }
|
|
a_op_const_reg(list,OP_AND,OS_INT,(1 shl sref.bitlen)-1,valuereg);
|
|
{ use subsetreg routine, it may have been overridden with an optimized version }
|
|
fromsreg.subsetreg := extra_value_reg;
|
|
fromsreg.subsetregsize := OS_INT;
|
|
{ subsetregs always count bits from right to left }
|
|
if (target_info.endian = endian_big) then
|
|
fromsreg.startbit := loadbitsize-restbits
|
|
else
|
|
fromsreg.startbit := 0;
|
|
fromsreg.bitlen := restbits;
|
|
|
|
tosreg.subsetreg := valuereg;
|
|
tosreg.subsetregsize := OS_INT;
|
|
if (target_info.endian = endian_big) then
|
|
tosreg.startbit := 0
|
|
else
|
|
tosreg.startbit := loadbitsize-sref.startbit;
|
|
tosreg.bitlen := restbits;
|
|
|
|
a_load_subsetreg_subsetreg(list,subsetsize,subsetsize,fromsreg,tosreg);
|
|
end;
|
|
|
|
end.
|