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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
{
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Copyright (c) 1998-2004 by Florian Klaempfl
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Generate sparc assembler for in set/case nodes
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit ncpuset;
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{$i fpcdefs.inc}
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interface
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uses
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globtype,
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nset,
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ncgset;
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type
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tcpucasenode = class(tcgcasenode)
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protected
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procedure optimizevalues(var max_linear_list:aint;var max_dist:aword);override;
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function has_jumptable : boolean;override;
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procedure genjumptable(hp : pcaselabel;min_,max_ : aint);override;
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end;
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implementation
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uses
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globals,constexp,
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systems,
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cpubase,
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aasmbase,aasmtai,aasmdata,aasmcpu,
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cgbase,cgutils,cgobj,
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procinfo;
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procedure tcpucasenode.optimizevalues(var max_linear_list:aint;var max_dist:aword);
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begin
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{ give the jump table a higher priority }
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max_dist:=(max_dist*3) div 2;
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end;
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function tcpucasenode.has_jumptable : boolean;
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begin
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has_jumptable:=true;
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end;
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procedure tcpucasenode.genjumptable(hp : pcaselabel;min_,max_ : aint);
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var
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table : tasmlabel;
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last : TConstExprInt;
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indexreg,jmpreg,basereg : tregister;
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href : treference;
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procedure genitem(list:TAsmList;t : pcaselabel);
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var
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i : aint;
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begin
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if assigned(t^.less) then
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genitem(list,t^.less);
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{ fill possible hole }
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for i:=last.svalue+1 to t^._low.svalue-1 do
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list.concat(Tai_const.Create_sym(elselabel));
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for i:=t^._low.svalue to t^._high.svalue do
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list.concat(Tai_const.Create_sym(blocklabel(t^.blockid)));
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last:=t^._high;
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if assigned(t^.greater) then
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genitem(list,t^.greater);
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end;
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begin
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if not(jumptable_no_range) then
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begin
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{ case expr less than min_ => goto elselabel }
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cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,opsize,jmp_lt,aint(min_),hregister,elselabel);
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{ case expr greater than max_ => goto elselabel }
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cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,opsize,jmp_gt,aint(max_),hregister,elselabel);
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end;
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current_asmdata.getjumplabel(table);
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indexreg:=cg.getaddressregister(current_asmdata.CurrAsmList);
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cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SHL,OS_ADDR,2,hregister,indexreg);
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{ create reference }
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reference_reset_symbol(href,table,0,sizeof(pint));
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href.offset:=(-aint(min_))*4;
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basereg:=cg.getaddressregister(current_asmdata.CurrAsmList);
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cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,href,basereg);
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jmpreg:=cg.getaddressregister(current_asmdata.CurrAsmList);
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reference_reset(href,sizeof(pint));
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href.index:=indexreg;
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href.base:=basereg;
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cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,href,jmpreg);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg(A_JMP,jmpreg));
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{ Delay slot }
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current_asmdata.CurrAsmList.concat(taicpu.op_none(A_NOP));
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{ generate jump table }
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new_section(current_procinfo.aktlocaldata,sec_data,current_procinfo.procdef.mangledname,sizeof(pint));
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current_procinfo.aktlocaldata.concat(Tai_label.Create(table));
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last:=min_;
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genitem(current_procinfo.aktlocaldata,hp);
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end;
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begin
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ccasenode:=tcpucasenode;
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end.
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