mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-11-04 15:39:24 +01:00
780e75bfac
* generate add.w instead of add for thumb-2 in case one of the registers
is > r8
* add register interferences for the "add" instruction so the register
allocator can detect invalid instruction forms (even for assembler code)
* fixed error in thumb2.inc detected by the previous change
git-svn-id: trunk@16633 -
382 lines
13 KiB
ObjectPascal
382 lines
13 KiB
ObjectPascal
{
|
||
Copyright (c) 1998-2003 by Florian Klaempfl
|
||
|
||
This unit implements the arm specific class for the register
|
||
allocator
|
||
|
||
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 rgcpu;
|
||
|
||
{$i fpcdefs.inc}
|
||
|
||
interface
|
||
|
||
uses
|
||
aasmbase,aasmtai,aasmdata,aasmcpu,
|
||
cgbase,cgutils,
|
||
cpubase,
|
||
rgobj;
|
||
|
||
type
|
||
trgcpu = class(trgobj)
|
||
procedure do_spill_read(list:TAsmList;pos:tai;const spilltemp:treference;tempreg:tregister);override;
|
||
procedure do_spill_written(list:TAsmList;pos:tai;const spilltemp:treference;tempreg:tregister);override;
|
||
procedure add_constraints(reg:tregister);override;
|
||
function get_spill_subreg(r:tregister) : tsubregister;override;
|
||
end;
|
||
|
||
trgcputhumb2 = class(trgobj)
|
||
procedure do_spill_read(list:TAsmList;pos:tai;const spilltemp:treference;tempreg:tregister);override;
|
||
procedure do_spill_written(list:TAsmList;pos:tai;const spilltemp:treference;tempreg:tregister);override;
|
||
end;
|
||
|
||
trgintcputhumb2 = class(trgcputhumb2)
|
||
procedure add_cpu_interferences(p : tai);override;
|
||
end;
|
||
|
||
trgintcpu = class(trgcpu)
|
||
procedure add_cpu_interferences(p : tai);override;
|
||
end;
|
||
|
||
implementation
|
||
|
||
uses
|
||
verbose, cutils,globtype,
|
||
cgobj,
|
||
procinfo;
|
||
|
||
procedure trgintcputhumb2.add_cpu_interferences(p: tai);
|
||
begin
|
||
if p.typ=ait_instruction then
|
||
begin
|
||
case taicpu(p).opcode of
|
||
A_ADD:
|
||
begin
|
||
if taicpu(p).ops = 3 then
|
||
begin
|
||
if (taicpu(p).oper[0]^.typ = top_reg) and
|
||
(taicpu(p).oper[1]^.typ = top_reg) and
|
||
(taicpu(p).oper[2]^.typ in [top_reg, top_shifterop]) then
|
||
begin
|
||
{ if d == 13 || (d == 15 && S == ‘0’) || n == 15 || m IN [13,15] then UNPREDICTABLE; }
|
||
add_edge(getsupreg(taicpu(p).oper[0]^.reg), RS_R13);
|
||
if taicpu(p).oppostfix <> PF_S then
|
||
add_edge(getsupreg(taicpu(p).oper[0]^.reg), RS_R15);
|
||
|
||
add_edge(getsupreg(taicpu(p).oper[1]^.reg), RS_R15);
|
||
|
||
if (taicpu(p).oper[2]^.typ = top_shifterop) and
|
||
(taicpu(p).oper[2]^.shifterop^.rs <> NR_NO) then
|
||
begin
|
||
add_edge(getsupreg(taicpu(p).oper[2]^.shifterop^.rs), RS_R13);
|
||
add_edge(getsupreg(taicpu(p).oper[2]^.shifterop^.rs), RS_R15);
|
||
end
|
||
else if (taicpu(p).oper[2]^.typ = top_reg) then
|
||
begin
|
||
add_edge(getsupreg(taicpu(p).oper[2]^.reg), RS_R13);
|
||
add_edge(getsupreg(taicpu(p).oper[2]^.reg), RS_R15);
|
||
end;
|
||
end;
|
||
end;
|
||
end;
|
||
end;
|
||
end;
|
||
end;
|
||
|
||
|
||
procedure trgcpu.do_spill_read(list:TAsmList;pos:tai;const spilltemp:treference;tempreg:tregister);
|
||
var
|
||
tmpref : treference;
|
||
helplist : TAsmList;
|
||
l : tasmlabel;
|
||
hreg : tregister;
|
||
begin
|
||
{ don't load spilled register between
|
||
mov lr,pc
|
||
mov pc,r4
|
||
but befure the mov lr,pc
|
||
}
|
||
if assigned(pos.previous) and
|
||
(pos.typ=ait_instruction) and
|
||
(taicpu(pos).opcode=A_MOV) and
|
||
(taicpu(pos).oper[0]^.typ=top_reg) and
|
||
(taicpu(pos).oper[0]^.reg=NR_R14) and
|
||
(taicpu(pos).oper[1]^.typ=top_reg) and
|
||
(taicpu(pos).oper[1]^.reg=NR_PC) then
|
||
pos:=tai(pos.previous);
|
||
|
||
if abs(spilltemp.offset)>4095 then
|
||
begin
|
||
helplist:=TAsmList.create;
|
||
reference_reset(tmpref,sizeof(aint));
|
||
{ create consts entry }
|
||
current_asmdata.getjumplabel(l);
|
||
cg.a_label(current_procinfo.aktlocaldata,l);
|
||
tmpref.symboldata:=current_procinfo.aktlocaldata.last;
|
||
|
||
current_procinfo.aktlocaldata.concat(tai_const.Create_32bit(spilltemp.offset));
|
||
|
||
{ load consts entry }
|
||
if getregtype(tempreg)=R_INTREGISTER then
|
||
hreg:=getregisterinline(helplist,[R_SUBWHOLE])
|
||
else
|
||
hreg:=cg.getintregister(helplist,OS_ADDR);
|
||
|
||
tmpref.symbol:=l;
|
||
tmpref.base:=NR_R15;
|
||
helplist.concat(taicpu.op_reg_ref(A_LDR,hreg,tmpref));
|
||
|
||
reference_reset_base(tmpref,current_procinfo.framepointer,0,sizeof(aint));
|
||
tmpref.index:=hreg;
|
||
|
||
if spilltemp.index<>NR_NO then
|
||
internalerror(200401263);
|
||
|
||
helplist.concat(spilling_create_load(tmpref,tempreg));
|
||
if getregtype(tempreg)=R_INTREGISTER then
|
||
ungetregisterinline(helplist,hreg);
|
||
|
||
list.insertlistafter(pos,helplist);
|
||
helplist.free;
|
||
end
|
||
else
|
||
inherited do_spill_read(list,pos,spilltemp,tempreg);
|
||
end;
|
||
|
||
|
||
procedure trgcpu.do_spill_written(list:TAsmList;pos:tai;const spilltemp:treference;tempreg:tregister);
|
||
var
|
||
tmpref : treference;
|
||
helplist : TAsmList;
|
||
l : tasmlabel;
|
||
hreg : tregister;
|
||
begin
|
||
if abs(spilltemp.offset)>4095 then
|
||
begin
|
||
helplist:=TAsmList.create;
|
||
reference_reset(tmpref,sizeof(aint));
|
||
{ create consts entry }
|
||
current_asmdata.getjumplabel(l);
|
||
cg.a_label(current_procinfo.aktlocaldata,l);
|
||
tmpref.symboldata:=current_procinfo.aktlocaldata.last;
|
||
|
||
current_procinfo.aktlocaldata.concat(tai_const.Create_32bit(spilltemp.offset));
|
||
|
||
{ load consts entry }
|
||
if getregtype(tempreg)=R_INTREGISTER then
|
||
hreg:=getregisterinline(helplist,[R_SUBWHOLE])
|
||
else
|
||
hreg:=cg.getintregister(helplist,OS_ADDR);
|
||
tmpref.symbol:=l;
|
||
tmpref.base:=NR_R15;
|
||
helplist.concat(taicpu.op_reg_ref(A_LDR,hreg,tmpref));
|
||
|
||
if spilltemp.index<>NR_NO then
|
||
internalerror(200401263);
|
||
|
||
reference_reset_base(tmpref,current_procinfo.framepointer,0,sizeof(pint));
|
||
tmpref.index:=hreg;
|
||
|
||
helplist.concat(spilling_create_store(tempreg,tmpref));
|
||
|
||
if getregtype(tempreg)=R_INTREGISTER then
|
||
ungetregisterinline(helplist,hreg);
|
||
|
||
list.insertlistafter(pos,helplist);
|
||
helplist.free;
|
||
end
|
||
else
|
||
inherited do_spill_written(list,pos,spilltemp,tempreg);
|
||
end;
|
||
|
||
|
||
procedure trgcpu.add_constraints(reg:tregister);
|
||
var
|
||
supreg,i : Tsuperregister;
|
||
begin
|
||
case getsubreg(reg) of
|
||
{ Let 32bit floats conflict with all double precision regs > 15
|
||
(since these don't have 32 bit equivalents) }
|
||
R_SUBFS:
|
||
begin
|
||
supreg:=getsupreg(reg);
|
||
for i:=RS_D16 to RS_D31 do
|
||
add_edge(supreg,i);
|
||
end;
|
||
end;
|
||
end;
|
||
|
||
|
||
function trgcpu.get_spill_subreg(r:tregister) : tsubregister;
|
||
begin
|
||
if (getregtype(r)<>R_MMREGISTER) then
|
||
result:=defaultsub
|
||
else
|
||
result:=getsubreg(r);
|
||
end;
|
||
|
||
|
||
procedure trgcputhumb2.do_spill_read(list:TAsmList;pos:tai;const spilltemp:treference;tempreg:tregister);
|
||
var
|
||
tmpref : treference;
|
||
helplist : TAsmList;
|
||
l : tasmlabel;
|
||
hreg : tregister;
|
||
begin
|
||
{ don't load spilled register between
|
||
mov lr,pc
|
||
mov pc,r4
|
||
but befure the mov lr,pc
|
||
}
|
||
if assigned(pos.previous) and
|
||
(pos.typ=ait_instruction) and
|
||
(taicpu(pos).opcode=A_MOV) and
|
||
(taicpu(pos).oper[0]^.typ=top_reg) and
|
||
(taicpu(pos).oper[0]^.reg=NR_R14) and
|
||
(taicpu(pos).oper[1]^.typ=top_reg) and
|
||
(taicpu(pos).oper[1]^.reg=NR_PC) then
|
||
pos:=tai(pos.previous);
|
||
|
||
if (spilltemp.offset>4095) or (spilltemp.offset<-255) then
|
||
begin
|
||
helplist:=TAsmList.create;
|
||
reference_reset(tmpref,sizeof(aint));
|
||
{ create consts entry }
|
||
current_asmdata.getjumplabel(l);
|
||
cg.a_label(current_procinfo.aktlocaldata,l);
|
||
tmpref.symboldata:=current_procinfo.aktlocaldata.last;
|
||
|
||
current_procinfo.aktlocaldata.concat(tai_const.Create_32bit(spilltemp.offset));
|
||
|
||
{ load consts entry }
|
||
if getregtype(tempreg)=R_INTREGISTER then
|
||
hreg:=getregisterinline(helplist,[R_SUBWHOLE])
|
||
else
|
||
hreg:=cg.getintregister(helplist,OS_ADDR);
|
||
|
||
tmpref.symbol:=l;
|
||
tmpref.base:=NR_R15;
|
||
helplist.concat(taicpu.op_reg_ref(A_LDR,hreg,tmpref));
|
||
|
||
reference_reset_base(tmpref,current_procinfo.framepointer,0,sizeof(aint));
|
||
tmpref.index:=hreg;
|
||
|
||
if spilltemp.index<>NR_NO then
|
||
internalerror(200401263);
|
||
|
||
helplist.concat(spilling_create_load(tmpref,tempreg));
|
||
if getregtype(tempreg)=R_INTREGISTER then
|
||
ungetregisterinline(helplist,hreg);
|
||
|
||
list.insertlistafter(pos,helplist);
|
||
helplist.free;
|
||
end
|
||
else
|
||
inherited do_spill_read(list,pos,spilltemp,tempreg);
|
||
end;
|
||
|
||
|
||
procedure trgcputhumb2.do_spill_written(list:TAsmList;pos:tai;const spilltemp:treference;tempreg:tregister);
|
||
var
|
||
tmpref : treference;
|
||
helplist : TAsmList;
|
||
l : tasmlabel;
|
||
hreg : tregister;
|
||
begin
|
||
if (spilltemp.offset>4095) or (spilltemp.offset<-255) then
|
||
begin
|
||
helplist:=TAsmList.create;
|
||
reference_reset(tmpref,sizeof(aint));
|
||
{ create consts entry }
|
||
current_asmdata.getjumplabel(l);
|
||
cg.a_label(current_procinfo.aktlocaldata,l);
|
||
tmpref.symboldata:=current_procinfo.aktlocaldata.last;
|
||
|
||
current_procinfo.aktlocaldata.concat(tai_const.Create_32bit(spilltemp.offset));
|
||
|
||
{ load consts entry }
|
||
if getregtype(tempreg)=R_INTREGISTER then
|
||
hreg:=getregisterinline(helplist,[R_SUBWHOLE])
|
||
else
|
||
hreg:=cg.getintregister(helplist,OS_ADDR);
|
||
tmpref.symbol:=l;
|
||
tmpref.base:=NR_R15;
|
||
helplist.concat(taicpu.op_reg_ref(A_LDR,hreg,tmpref));
|
||
|
||
if spilltemp.index<>NR_NO then
|
||
internalerror(200401263);
|
||
|
||
reference_reset_base(tmpref,current_procinfo.framepointer,0,sizeof(pint));
|
||
tmpref.index:=hreg;
|
||
|
||
helplist.concat(spilling_create_store(tempreg,tmpref));
|
||
|
||
if getregtype(tempreg)=R_INTREGISTER then
|
||
ungetregisterinline(helplist,hreg);
|
||
|
||
list.insertlistafter(pos,helplist);
|
||
helplist.free;
|
||
end
|
||
else
|
||
inherited do_spill_written(list,pos,spilltemp,tempreg);
|
||
end;
|
||
|
||
|
||
procedure trgintcpu.add_cpu_interferences(p : tai);
|
||
var
|
||
r : tregister;
|
||
begin
|
||
if p.typ=ait_instruction then
|
||
begin
|
||
case taicpu(p).opcode of
|
||
A_MUL:
|
||
add_edge(getsupreg(taicpu(p).oper[0]^.reg),getsupreg(taicpu(p).oper[1]^.reg));
|
||
A_UMULL,
|
||
A_UMLAL,
|
||
A_SMULL,
|
||
A_SMLAL:
|
||
begin
|
||
add_edge(getsupreg(taicpu(p).oper[0]^.reg),getsupreg(taicpu(p).oper[1]^.reg));
|
||
add_edge(getsupreg(taicpu(p).oper[1]^.reg),getsupreg(taicpu(p).oper[2]^.reg));
|
||
add_edge(getsupreg(taicpu(p).oper[0]^.reg),getsupreg(taicpu(p).oper[2]^.reg));
|
||
end;
|
||
A_LDRB,
|
||
A_STRB,
|
||
A_STR,
|
||
A_LDR,
|
||
A_LDRH,
|
||
A_STRH:
|
||
{ don't mix up the framepointer and stackpointer with pre/post indexed operations }
|
||
if (taicpu(p).oper[1]^.typ=top_ref) and
|
||
(taicpu(p).oper[1]^.ref^.addressmode in [AM_PREINDEXED,AM_POSTINDEXED]) then
|
||
begin
|
||
add_edge(getsupreg(taicpu(p).oper[1]^.ref^.base),getsupreg(current_procinfo.framepointer));
|
||
{ FIXME: temp variable r is needed here to avoid Internal error 20060521 }
|
||
{ while compiling the compiler. }
|
||
r:=NR_STACK_POINTER_REG;
|
||
if current_procinfo.framepointer<>r then
|
||
add_edge(getsupreg(taicpu(p).oper[1]^.ref^.base),getsupreg(r));
|
||
end;
|
||
end;
|
||
end;
|
||
end;
|
||
|
||
|
||
end.
|