mirror of
https://gitlab.com/freepascal.org/fpc/source.git
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05a628447f
array and string data * added al_rodata * renamed tasmlist enum names to include al_ prefix git-svn-id: trunk@899 -
134 lines
4.1 KiB
ObjectPascal
134 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,
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systems,
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cpubase,
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aasmbase,aasmtai,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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jumpsegment : TAAsmOutput;
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procedure genitem(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(t^.less);
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{ fill possible hole }
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for i:=last+1 to t^._low-1 do
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jumpSegment.concat(Tai_const.Create_sym(elselabel));
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for i:=t^._low to t^._high do
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jumpSegment.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(t^.greater);
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end;
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begin
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if (cs_create_smart in aktmoduleswitches) or
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(af_smartlink_sections in target_asm.flags) then
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jumpsegment:=current_procinfo.aktlocaldata
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else
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jumpsegment:=asmlist[al_data];
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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(exprasmlist,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(exprasmlist,opsize,jmp_gt,aint(max_),hregister,elselabel);
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end;
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objectlibrary.getlabel(table);
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indexreg:=cg.getaddressregister(exprasmlist);
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cg.a_op_const_reg_reg(exprasmlist,OP_SHL,OS_ADDR,2,hregister,indexreg);
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{ create reference }
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reference_reset_symbol(href,table,0);
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href.offset:=(-aint(min_))*4;
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basereg:=cg.getaddressregister(exprasmlist);
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cg.a_loadaddr_ref_reg(exprasmlist,href,basereg);
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jmpreg:=cg.getaddressregister(exprasmlist);
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reference_reset(href);
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href.index:=indexreg;
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href.base:=basereg;
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cg.a_load_ref_reg(exprasmlist,OS_ADDR,OS_ADDR,href,jmpreg);
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exprasmlist.concat(taicpu.op_reg(A_JMP,jmpreg));
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{ Delay slot }
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exprasmlist.concat(taicpu.op_none(A_NOP));
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{ generate jump table }
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if not(cs_littlesize in aktglobalswitches) then
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jumpSegment.concat(Tai_Align.Create_Op(4,0));
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jumpSegment.concat(Tai_label.Create(table));
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last:=min_;
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genitem(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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