mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-05-01 22:13:46 +02:00
7d459cf12a
alignment for each memory reference (mantis #12137, and test/packages/fcl-registry/tregistry1.pp on sparc). This also enables better code generation for packed records in many cases. o several changes were made to the compiler to minimise the chances of accidentally forgetting to set the alignment of memory references in the future: - reference_reset*() now has an extra alignment parameter - location_reset() can now only be used for non LOC_(C)REFERENCE, use location_reset_ref() for those (split the tloc enum so the compiler can catch errors using range checking) git-svn-id: trunk@12719 -
127 lines
4.1 KiB
ObjectPascal
127 lines
4.1 KiB
ObjectPascal
{
|
|
Copyright (c) 1998-2004 by Florian Klaempfl
|
|
|
|
Generate sparc assembler for in set/case nodes
|
|
|
|
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 ncpuset;
|
|
|
|
{$i fpcdefs.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
globtype,
|
|
nset,
|
|
ncgset;
|
|
|
|
type
|
|
tcpucasenode = class(tcgcasenode)
|
|
protected
|
|
procedure optimizevalues(var max_linear_list:aint;var max_dist:aword);override;
|
|
function has_jumptable : boolean;override;
|
|
procedure genjumptable(hp : pcaselabel;min_,max_ : aint);override;
|
|
end;
|
|
|
|
|
|
implementation
|
|
|
|
uses
|
|
globals,constexp,
|
|
systems,
|
|
cpubase,
|
|
aasmbase,aasmtai,aasmdata,aasmcpu,
|
|
cgbase,cgutils,cgobj,
|
|
procinfo;
|
|
|
|
procedure tcpucasenode.optimizevalues(var max_linear_list:aint;var max_dist:aword);
|
|
begin
|
|
{ give the jump table a higher priority }
|
|
max_dist:=(max_dist*3) div 2;
|
|
end;
|
|
|
|
|
|
function tcpucasenode.has_jumptable : boolean;
|
|
begin
|
|
has_jumptable:=true;
|
|
end;
|
|
|
|
|
|
procedure tcpucasenode.genjumptable(hp : pcaselabel;min_,max_ : aint);
|
|
var
|
|
table : tasmlabel;
|
|
last : TConstExprInt;
|
|
indexreg,jmpreg,basereg : tregister;
|
|
href : treference;
|
|
|
|
procedure genitem(list:TAsmList;t : pcaselabel);
|
|
var
|
|
i : aint;
|
|
begin
|
|
if assigned(t^.less) then
|
|
genitem(list,t^.less);
|
|
{ fill possible hole }
|
|
for i:=last.svalue+1 to t^._low.svalue-1 do
|
|
list.concat(Tai_const.Create_sym(elselabel));
|
|
for i:=t^._low.svalue to t^._high.svalue do
|
|
list.concat(Tai_const.Create_sym(blocklabel(t^.blockid)));
|
|
last:=t^._high;
|
|
if assigned(t^.greater) then
|
|
genitem(list,t^.greater);
|
|
end;
|
|
|
|
begin
|
|
if not(jumptable_no_range) then
|
|
begin
|
|
{ case expr less than min_ => goto elselabel }
|
|
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,opsize,jmp_lt,aint(min_),hregister,elselabel);
|
|
{ case expr greater than max_ => goto elselabel }
|
|
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,opsize,jmp_gt,aint(max_),hregister,elselabel);
|
|
end;
|
|
current_asmdata.getjumplabel(table);
|
|
indexreg:=cg.getaddressregister(current_asmdata.CurrAsmList);
|
|
cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SHL,OS_ADDR,2,hregister,indexreg);
|
|
{ create reference }
|
|
reference_reset_symbol(href,table,0,sizeof(pint));
|
|
href.offset:=(-aint(min_))*4;
|
|
basereg:=cg.getaddressregister(current_asmdata.CurrAsmList);
|
|
cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,href,basereg);
|
|
|
|
jmpreg:=cg.getaddressregister(current_asmdata.CurrAsmList);
|
|
|
|
reference_reset(href,sizeof(pint));
|
|
href.index:=indexreg;
|
|
href.base:=basereg;
|
|
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,href,jmpreg);
|
|
|
|
current_asmdata.CurrAsmList.concat(taicpu.op_reg(A_JMP,jmpreg));
|
|
{ Delay slot }
|
|
current_asmdata.CurrAsmList.concat(taicpu.op_none(A_NOP));
|
|
{ generate jump table }
|
|
new_section(current_procinfo.aktlocaldata,sec_data,current_procinfo.procdef.mangledname,sizeof(pint));
|
|
current_procinfo.aktlocaldata.concat(Tai_label.Create(table));
|
|
last:=min_;
|
|
genitem(current_procinfo.aktlocaldata,hp);
|
|
end;
|
|
|
|
|
|
|
|
begin
|
|
ccasenode:=tcpucasenode;
|
|
end.
|