/compiler/arm/narmmem.pas

 1{
 2    Copyright (c) 2012 by Florian Klaempfl
 3
 4    Generate arm assembler for in memory related nodes
 5
 6    This program is free software; you can redistribute it and/or modify
 7    it under the terms of the GNU General Public License as published by
 8    the Free Software Foundation; either version 2 of the License, or
 9    (at your option) any later version.
10
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15
16    You should have received a copy of the GNU General Public License
17    along with this program; if not, write to the Free Software
18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19
20 ****************************************************************************
21}
22unit narmmem;
23
24{$i fpcdefs.inc}
25
26interface
27
28    uses
29      globtype,
30      cgbase,cpubase,nmem,ncgmem;
31
32    type
33      tarmvecnode = class(tcgvecnode)
34        procedure update_reference_reg_mul(maybe_const_reg: tregister; l: aint);override;
35      end;
36
37implementation
38
39    uses
40      cutils,verbose,aasmdata,aasmcpu,cgobj;
41
42{*****************************************************************************
43                             TARMVECNODE
44*****************************************************************************}
45
46     procedure tarmvecnode.update_reference_reg_mul(maybe_const_reg:tregister;l:aint);
47       var
48         hreg: tregister;
49         hl : longint;
50       begin
51         if ((location.reference.base=NR_NO) and (location.reference.index=NR_NO)) or
52            { simple constant? }
53            (l=1) or ispowerof2(l,hl) or ispowerof2(l+1,hl) or ispowerof2(l-1,hl) then
54           inherited update_reference_reg_mul(maybe_const_reg,l)
55         else if (location.reference.base<>NR_NO) then
56           begin
57             hreg:=cg.getaddressregister(current_asmdata.CurrAsmList);
58             cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_ADDR,l,hreg);
59             current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg_reg(A_MLA,hreg,maybe_const_reg,hreg,location.reference.base));
60             location.reference.base:=hreg;
61             { update alignment }
62             if (location.reference.alignment=0) then
63               internalerror(2012052202);
64             location.reference.alignment:=newalignment(location.reference.alignment,l);
65           end
66         else if (location.reference.index<>NR_NO) then
67           begin
68             hreg:=cg.getaddressregister(current_asmdata.CurrAsmList);
69             cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_ADDR,l,hreg);
70             current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg_reg(A_MLA,hreg,maybe_const_reg,hreg,location.reference.index));
71             location.reference.base:=hreg;
72             location.reference.index:=NR_NO;
73             { update alignment }
74             if (location.reference.alignment=0) then
75               internalerror(2012052203);
76             location.reference.alignment:=newalignment(location.reference.alignment,l);
77           end
78         else
79           internalerror(2012052201);
80       end;
81
82
83begin
84  cvecnode:=tarmvecnode;
85end.