mirror of
https://gitlab.com/freepascal.org/fpc/source.git
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23d69a5126
(adapted tgeni386 a bit for this) and enabled it by default
* fixed very big and stupid bug of mine in cg386mat that broke the
include() code (and make cycle :( ) if you compiled without
-dnewoptimizations
1009 lines
37 KiB
ObjectPascal
1009 lines
37 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2000 by Florian Klaempfl
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Generate i386 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 cg386set;
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interface
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uses
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tree;
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procedure secondsetelement(var p : ptree);
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procedure secondin(var p : ptree);
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procedure secondcase(var p : ptree);
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implementation
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uses
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globtype,systems,
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cobjects,verbose,globals,
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symconst,symtable,aasm,types,
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hcodegen,temp_gen,pass_2,
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cpubase,cpuasm,
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cgai386,tgeni386;
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const
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bytes2Sxx:array[1..4] of Topsize=(S_B,S_W,S_NO,S_L);
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{*****************************************************************************
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SecondSetElement
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*****************************************************************************}
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procedure secondsetelement(var p : ptree);
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begin
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{ load first value in 32bit register }
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secondpass(p^.left);
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if p^.left^.location.loc in [LOC_REGISTER,LOC_CREGISTER] then
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emit_to_reg32(p^.left^.location.register);
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{ also a second value ? }
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if assigned(p^.right) then
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begin
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secondpass(p^.right);
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if p^.right^.location.loc in [LOC_REGISTER,LOC_CREGISTER] then
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emit_to_reg32(p^.right^.location.register);
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end;
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{ we doesn't modify the left side, we check only the type }
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set_location(p^.location,p^.left^.location);
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end;
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{*****************************************************************************
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SecondIn
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*****************************************************************************}
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procedure secondin(var p : ptree);
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type
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Tsetpart=record
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range : boolean; {Part is a range.}
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start,stop : byte; {Start/stop when range; Stop=element when an element.}
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end;
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var
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genjumps,
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use_small,
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pushed,
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ranges : boolean;
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hr,hr2,
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pleftreg : tregister;
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opsize : topsize;
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setparts : array[1..8] of Tsetpart;
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i,numparts : byte;
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{href,href2 : Treference;}
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l,l2 : pasmlabel;
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{$ifdef CORRECT_SET_IN_FPC}
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AM : tasmop;
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{$endif CORRECT_SET_IN_FPC}
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function analizeset(Aset:pconstset;is_small:boolean):boolean;
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type
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byteset=set of byte;
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var
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compares,maxcompares:word;
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i:byte;
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begin
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analizeset:=false;
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ranges:=false;
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numparts:=0;
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compares:=0;
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{ Lots of comparisions take a lot of time, so do not allow
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too much comparisions. 8 comparisions are, however, still
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smalller than emitting the set }
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if cs_littlesize in aktglobalswitches then
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maxcompares:=8
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else
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maxcompares:=5;
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{ when smallset is possible allow only 3 compares the smallset
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code is for littlesize also smaller when more compares are used }
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if is_small then
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maxcompares:=3;
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for i:=0 to 255 do
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if i in byteset(Aset^) then
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begin
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if (numparts=0) or (i<>setparts[numparts].stop+1) then
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begin
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{Set element is a separate element.}
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inc(compares);
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if compares>maxcompares then
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exit;
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inc(numparts);
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setparts[numparts].range:=false;
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setparts[numparts].stop:=i;
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end
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else
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{Set element is part of a range.}
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if not setparts[numparts].range then
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begin
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{Transform an element into a range.}
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setparts[numparts].range:=true;
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setparts[numparts].start:=setparts[numparts].stop;
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setparts[numparts].stop:=i;
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inc(compares);
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if compares>maxcompares then
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exit;
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end
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else
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begin
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{Extend a range.}
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setparts[numparts].stop:=i;
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{A range of two elements can better
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be checked as two separate ones.
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When extending a range, our range
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becomes larger than two elements.}
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ranges:=true;
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end;
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end;
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analizeset:=true;
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end;
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begin
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{ We check first if we can generate jumps, this can be done
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because the resulttype is already set in firstpass }
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{ check if we can use smallset operation using btl which is limited
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to 32 bits, the left side may also not contain higher values !! }
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use_small:=(psetdef(p^.right^.resulttype)^.settype=smallset) and
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((p^.left^.resulttype^.deftype=orddef) and (porddef(p^.left^.resulttype)^.high<=32) or
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(p^.left^.resulttype^.deftype=enumdef) and (penumdef(p^.left^.resulttype)^.max<=32));
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{ Can we generate jumps? Possible for all types of sets }
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genjumps:=(p^.right^.treetype=setconstn) and
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analizeset(p^.right^.value_set,use_small);
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{ calculate both operators }
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{ the complex one first }
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firstcomplex(p);
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secondpass(p^.left);
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{ Only process the right if we are not generating jumps }
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if not genjumps then
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begin
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pushed:=maybe_push(p^.right^.registers32,p^.left,false);
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secondpass(p^.right);
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if pushed then
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restore(p^.left,false);
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end;
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if codegenerror then
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exit;
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{ ofcourse not commutative }
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if p^.swaped then
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swaptree(p);
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if genjumps then
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begin
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{ It gives us advantage to check for the set elements
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separately instead of using the SET_IN_BYTE procedure.
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To do: Build in support for LOC_JUMP }
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{ If register is used, use only lower 8 bits }
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if p^.left^.location.loc in [LOC_REGISTER,LOC_CREGISTER] then
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begin
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pleftreg:=p^.left^.location.register;
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if pleftreg in [R_AX..R_DX] then
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begin
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emit_const_reg(A_AND,S_W,255,pleftreg);
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opsize:=S_W;
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end
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else
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if pleftreg in [R_EAX..R_EDI] then
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begin
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emit_const_reg(A_AND,S_L,255,pleftreg);
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opsize:=S_L;
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end
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else
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opsize:=S_B;
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end;
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{ Get a label to jump to the end }
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p^.location.loc:=LOC_FLAGS;
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{ It's better to use the zero flag when there are
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no ranges }
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if ranges then
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p^.location.resflags:=F_C
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else
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p^.location.resflags:=F_E;
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getlabel(l);
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for i:=1 to numparts do
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if setparts[i].range then
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begin
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{ Check if left is in a range }
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{ Get a label to jump over the check }
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getlabel(l2);
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if setparts[i].start=setparts[i].stop-1 then
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begin
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case p^.left^.location.loc of
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LOC_REGISTER,
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LOC_CREGISTER : emit_const_reg(A_CMP,opsize,
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setparts[i].start,pleftreg);
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else
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emit_const_ref(A_CMP,S_B,
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setparts[i].start,newreference(p^.left^.location.reference));
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end;
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{ Result should be in carry flag when ranges are used }
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if ranges then
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emit_none(A_STC,S_NO);
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{ If found, jump to end }
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emitjmp(C_E,l);
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case p^.left^.location.loc of
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LOC_REGISTER,
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LOC_CREGISTER : emit_const_reg(A_CMP,opsize,
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setparts[i].stop,pleftreg);
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else
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emit_const_ref(A_CMP,S_B,
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setparts[i].stop,newreference(p^.left^.location.reference));
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end;
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{ Result should be in carry flag when ranges are used }
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if ranges then
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emit_none(A_STC,S_NO);
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{ If found, jump to end }
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emitjmp(C_E,l);
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end
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else
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begin
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if setparts[i].start<>0 then
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begin
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{ We only check for the lower bound if it is > 0, because
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set elements lower than 0 dont exist }
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case p^.left^.location.loc of
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LOC_REGISTER,
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LOC_CREGISTER :
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emit_const_reg(A_CMP,opsize,
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setparts[i].start,pleftreg);
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else
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emit_const_ref(A_CMP,S_B,
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setparts[i].start,newreference(p^.left^.location.reference));
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end;
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{ If lower, jump to next check }
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emitjmp(C_B,l2);
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end;
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{ We only check for the high bound if it is < 255, because
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set elements higher than 255 do nt exist, the its always true,
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so only a JMP is generated }
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if setparts[i].stop<>255 then
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begin
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case p^.left^.location.loc of
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LOC_REGISTER,
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LOC_CREGISTER : emit_const_reg(A_CMP,opsize,
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setparts[i].stop+1,pleftreg);
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else
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emit_const_ref(A_CMP,S_B,
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setparts[i].stop+1,newreference(p^.left^.location.reference));
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end;
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{ If higher, element is in set }
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emitjmp(C_B,l);
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end
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else
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begin
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emit_none(A_STC,S_NO);
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emitjmp(C_None,l);
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end;
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end;
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{ Emit the jump over label }
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emitlab(l2);
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end
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else
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begin
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{ Emit code to check if left is an element }
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case p^.left^.location.loc of
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LOC_REGISTER,
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LOC_CREGISTER : emit_const_reg(A_CMP,opsize,
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setparts[i].stop,pleftreg);
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else
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emit_const_ref(A_CMP,S_B,
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setparts[i].stop,newreference(p^.left^.location.reference));
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end;
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{ Result should be in carry flag when ranges are used }
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if ranges then
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emit_none(A_STC,S_NO);
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{ If found, jump to end }
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emitjmp(C_E,l);
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end;
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if ranges then
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emit_none(A_CLC,S_NO);
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{ To compensate for not doing a second pass }
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p^.right^.location.reference.symbol:=nil;
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{ Now place the end label }
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emitlab(l);
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case p^.left^.location.loc of
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LOC_REGISTER,
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LOC_CREGISTER : ungetregister32(pleftreg);
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else
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del_reference(p^.left^.location.reference);
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end;
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end
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else
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begin
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{ We will now generated code to check the set itself, no jmps,
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handle smallsets separate, because it allows faster checks }
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if use_small then
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begin
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if p^.left^.treetype=ordconstn then
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begin
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p^.location.resflags:=F_NE;
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case p^.right^.location.loc of
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LOC_REGISTER,
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LOC_CREGISTER:
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begin
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emit_const_reg(A_TEST,S_L,
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1 shl (p^.left^.value and 31),p^.right^.location.register);
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ungetregister32(p^.right^.location.register);
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end
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else
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begin
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emit_const_ref(A_TEST,S_L,1 shl (p^.left^.value and 31),
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newreference(p^.right^.location.reference));
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del_reference(p^.right^.location.reference);
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end;
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end;
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end
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else
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begin
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case p^.left^.location.loc of
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LOC_REGISTER,
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LOC_CREGISTER:
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begin
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hr:=p^.left^.location.register;
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emit_to_reg32(hr);
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end;
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else
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begin
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{ the set element isn't never samller than a byte }
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{ and because it's a small set we need only 5 bits }
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{ but 8 bits are easier to load }
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{$ifndef noAllocEdi}
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getexplicitregister32(R_EDI);
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{$endif noAllocEdi}
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emit_ref_reg(A_MOVZX,S_BL,
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newreference(p^.left^.location.reference),R_EDI);
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hr:=R_EDI;
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del_reference(p^.left^.location.reference);
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end;
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end;
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case p^.right^.location.loc of
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LOC_REGISTER,
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LOC_CREGISTER : emit_reg_reg(A_BT,S_L,hr,
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p^.right^.location.register);
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else
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begin
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del_reference(p^.right^.location.reference);
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if p^.right^.location.reference.is_immediate then
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begin
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{ We have to load the value into a register because
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btl does not accept values only refs or regs (PFV) }
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hr2:=getregister32;
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emit_const_reg(A_MOV,S_L,
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p^.right^.location.reference.offset,hr2);
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emit_reg_reg(A_BT,S_L,hr,hr2);
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ungetregister32(hr2);
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end
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else
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emit_reg_ref(A_BT,S_L,hr,
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newreference(p^.right^.location.reference));
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end;
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end;
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{$ifndef noAllocEdi}
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{ simply to indicate EDI is deallocated here too (JM) }
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ungetregister32(hr);
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{$else noAllocEdi}
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ungetregister32(hr);
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{$endif noAllocEdi}
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p^.location.loc:=LOC_FLAGS;
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p^.location.resflags:=F_C;
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end;
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end
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else
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begin
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if p^.right^.location.reference.is_immediate then
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begin
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p^.location.resflags:=F_C;
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getlabel(l);
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getlabel(l2);
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{ Is this treated in firstpass ?? }
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if p^.left^.treetype=ordconstn then
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begin
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hr:=getregister32;
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p^.left^.location.loc:=LOC_REGISTER;
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p^.left^.location.register:=hr;
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emit_const_reg(A_MOV,S_L,
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p^.left^.value,hr);
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end;
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case p^.left^.location.loc of
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LOC_REGISTER,
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LOC_CREGISTER:
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begin
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hr:=p^.left^.location.register;
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emit_to_reg32(hr);
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emit_const_reg(A_CMP,S_L,31,hr);
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emitjmp(C_NA,l);
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{ reset carry flag }
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emit_none(A_CLC,S_NO);
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emitjmp(C_NONE,l2);
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emitlab(l);
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{ We have to load the value into a register because
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btl does not accept values only refs or regs (PFV) }
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hr2:=getregister32;
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emit_const_reg(A_MOV,S_L,p^.right^.location.reference.offset,hr2);
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emit_reg_reg(A_BT,S_L,hr,hr2);
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ungetregister32(hr2);
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end;
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else
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begin
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{$ifdef CORRECT_SET_IN_FPC}
|
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if m_tp in aktmodeswitches then
|
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begin
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{***WARNING only correct if
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reference is 32 bits (PM) *****}
|
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emit_const_ref(A_CMP,S_L,
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31,newreference(p^.left^.location.reference));
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end
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else
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{$endif CORRECT_SET_IN_FPC}
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begin
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emit_const_ref(A_CMP,S_B,
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31,newreference(p^.left^.location.reference));
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end;
|
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emitjmp(C_NA,l);
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{ reset carry flag }
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emit_none(A_CLC,S_NO);
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emitjmp(C_NONE,l2);
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emitlab(l);
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del_reference(p^.left^.location.reference);
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hr:=getregister32;
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emit_ref_reg(A_MOV,S_L,
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newreference(p^.left^.location.reference),hr);
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{ We have to load the value into a register because
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btl does not accept values only refs or regs (PFV) }
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hr2:=getregister32;
|
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emit_const_reg(A_MOV,S_L,
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p^.right^.location.reference.offset,hr2);
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emit_reg_reg(A_BT,S_L,hr,hr2);
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ungetregister32(hr2);
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end;
|
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end;
|
|
emitlab(l2);
|
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end { of p^.right^.location.reference.is_immediate }
|
|
{ do search in a normal set which could have >32 elementsm
|
|
but also used if the left side contains higher values > 32 }
|
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else if p^.left^.treetype=ordconstn then
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begin
|
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p^.location.resflags:=F_NE;
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inc(p^.right^.location.reference.offset,p^.left^.value shr 3);
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emit_const_ref(A_TEST,S_B,1 shl (p^.left^.value and 7),
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newreference(p^.right^.location.reference));
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del_reference(p^.right^.location.reference);
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end
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else
|
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begin
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pushsetelement(p^.left);
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emitpushreferenceaddr(p^.right^.location.reference);
|
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del_reference(p^.right^.location.reference);
|
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{ registers need not be save. that happens in SET_IN_BYTE }
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{ (EDI is changed) }
|
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emitcall('FPC_SET_IN_BYTE');
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{ ungetiftemp(p^.right^.location.reference); }
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p^.location.loc:=LOC_FLAGS;
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p^.location.resflags:=F_C;
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end;
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end;
|
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end;
|
|
if (p^.right^.location.loc in [LOC_MEM,LOC_REFERENCE]) then
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ungetiftemp(p^.right^.location.reference);
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end;
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{*****************************************************************************
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SecondCase
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*****************************************************************************}
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procedure secondcase(var p : ptree);
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var
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with_sign : boolean;
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opsize : topsize;
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jmp_gt,jmp_le,jmp_lee : tasmcond;
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hp : ptree;
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{ register with case expression }
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hregister : tregister;
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endlabel,elselabel : pasmlabel;
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{ true, if we can omit the range check of the jump table }
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jumptable_no_range : boolean;
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{ where to put the jump table }
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jumpsegment : paasmoutput;
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procedure gentreejmp(p : pcaserecord);
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var
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lesslabel,greaterlabel : pasmlabel;
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begin
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emitlab(p^._at);
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{ calculate labels for left and right }
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if (p^.less=nil) then
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lesslabel:=elselabel
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else
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lesslabel:=p^.less^._at;
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if (p^.greater=nil) then
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greaterlabel:=elselabel
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else
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greaterlabel:=p^.greater^._at;
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{ calculate labels for left and right }
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{ no range label: }
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if p^._low=p^._high then
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begin
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emit_const_reg(A_CMP,opsize,p^._low,hregister);
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if greaterlabel=lesslabel then
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emitjmp(C_NE,lesslabel)
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else
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begin
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emitjmp(jmp_le,lesslabel);
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emitjmp(jmp_gt,greaterlabel);
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end;
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emitjmp(C_None,p^.statement);
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end
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else
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begin
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emit_const_reg(A_CMP,opsize,p^._low,hregister);
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emitjmp(jmp_le,lesslabel);
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emit_const_reg(A_CMP,opsize,p^._high,hregister);
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emitjmp(jmp_gt,greaterlabel);
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emitjmp(C_None,p^.statement);
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end;
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if assigned(p^.less) then
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gentreejmp(p^.less);
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if assigned(p^.greater) then
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gentreejmp(p^.greater);
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end;
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procedure genlinearlist(hp : pcaserecord);
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var
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first : boolean;
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last : longint;
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{helplabel : longint;}
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procedure genitem(t : pcaserecord);
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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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{ need we to test the first value }
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if first and (t^._low>get_min_value(p^.left^.resulttype)) then
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begin
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emit_const_reg(A_CMP,opsize,t^._low,hregister);
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emitjmp(jmp_le,elselabel);
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end;
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if t^._low=t^._high then
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begin
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if t^._low-last=1 then
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emit_reg(A_DEC,opsize,hregister)
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else if t^._low-last=0 then
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emit_reg_reg(A_OR,opsize,hregister,hregister)
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else
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emit_const_reg(A_SUB,opsize,t^._low-last,hregister);
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last:=t^._low;
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emitjmp(C_Z,t^.statement);
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end
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else
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begin
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{ it begins with the smallest label, if the value }
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{ is even smaller then jump immediately to the }
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{ ELSE-label }
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if first then
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begin
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{ have we to ajust the first value ? }
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if t^._low>get_min_value(p^.left^.resulttype) then
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begin
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if t^._low=1 then
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emit_reg(A_DEC,opsize,
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hregister)
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else
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emit_const_reg(A_SUB,opsize,
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t^._low,hregister);
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end;
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end
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else
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{ if there is no unused label between the last and the }
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{ present label then the lower limit can be checked }
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{ immediately. else check the range in between: }
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if (t^._low-last>1) then
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begin
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emit_const_reg(A_SUB,opsize,t^._low-last,hregister);
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emitjmp(jmp_le,elselabel);
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end
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else
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emit_reg(A_DEC,opsize,hregister);
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emit_const_reg(A_SUB,opsize,t^._high-t^._low,hregister);
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emitjmp(jmp_lee,t^.statement);
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last:=t^._high;
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end;
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first:=false;
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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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last:=0;
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first:=true;
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genitem(hp);
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emitjmp(C_None,elselabel);
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end;
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procedure genjumptable(hp : pcaserecord;min_,max_ : longint);
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var
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table : pasmlabel;
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last : longint;
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hr : preference;
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procedure genitem(t : pcaserecord);
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var
|
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i : longint;
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|
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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(new(pai_const_symbol,init(elselabel)));
|
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for i:=t^._low to t^._high do
|
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jumpsegment^.concat(new(pai_const_symbol,init(t^.statement)));
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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 not(jumptable_no_range) then
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begin
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emit_const_reg(A_CMP,opsize,min_,hregister);
|
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{ case expr less than min_ => goto elselabel }
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emitjmp(jmp_le,elselabel);
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emit_const_reg(A_CMP,opsize,max_,hregister);
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emitjmp(jmp_gt,elselabel);
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end;
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getlabel(table);
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{ extend with sign }
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if opsize=S_W then
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begin
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if with_sign then
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emit_reg_reg(A_MOVSX,S_WL,hregister,
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reg16toreg32(hregister))
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else
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emit_reg_reg(A_MOVZX,S_WL,hregister,
|
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reg16toreg32(hregister));
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hregister:=reg16toreg32(hregister);
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end
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else if opsize=S_B then
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begin
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if with_sign then
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emit_reg_reg(A_MOVSX,S_BL,hregister,
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reg8toreg32(hregister))
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else
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emit_reg_reg(A_MOVZX,S_BL,hregister,
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reg8toreg32(hregister));
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hregister:=reg8toreg32(hregister);
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end;
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new(hr);
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reset_reference(hr^);
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hr^.symbol:=table;
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hr^.offset:=(-min_)*4;
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hr^.index:=hregister;
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hr^.scalefactor:=4;
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emit_ref(A_JMP,S_NO,hr);
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{ !!!!! generate tables
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if not(cs_littlesize in aktlocalswitches) then
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jumpsegment^.concat(new(paicpu,op_const(A_ALIGN,S_NO,4)));
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}
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jumpsegment^.concat(new(pai_label,init(table)));
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last:=min_;
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genitem(hp);
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{ !!!!!!!
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if not(cs_littlesize in aktlocalswitches) then
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emit_const(A_ALIGN,S_NO,4);
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}
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end;
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var
|
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lv,hv,min_label,max_label,labels : longint;
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|
max_linear_list : longint;
|
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{$ifdef Delphi}
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dist : cardinal;
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{$else Delphi}
|
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dist : dword;
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|
{$endif Delphi}
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begin
|
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getlabel(endlabel);
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getlabel(elselabel);
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|
if (cs_create_smart in aktmoduleswitches) then
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|
jumpsegment:=procinfo^.aktlocaldata
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else
|
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jumpsegment:=datasegment;
|
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with_sign:=is_signed(p^.left^.resulttype);
|
|
if with_sign then
|
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begin
|
|
jmp_gt:=C_G;
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jmp_le:=C_L;
|
|
jmp_lee:=C_LE;
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|
end
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else
|
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begin
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|
jmp_gt:=C_A;
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|
jmp_le:=C_B;
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|
jmp_lee:=C_BE;
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end;
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cleartempgen;
|
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secondpass(p^.left);
|
|
{ determines the size of the operand }
|
|
opsize:=bytes2Sxx[p^.left^.resulttype^.size];
|
|
{ copy the case expression to a register }
|
|
case p^.left^.location.loc of
|
|
LOC_REGISTER:
|
|
hregister:=p^.left^.location.register;
|
|
LOC_FLAGS :
|
|
begin
|
|
hregister:=getregister32;
|
|
case opsize of
|
|
S_B : hregister:=reg32toreg8(hregister);
|
|
S_W : hregister:=reg32toreg16(hregister);
|
|
end;
|
|
emit_flag2reg(p^.left^.location.resflags,hregister);
|
|
end;
|
|
LOC_CREGISTER:
|
|
begin
|
|
hregister:=getregister32;
|
|
case opsize of
|
|
S_B : hregister:=reg32toreg8(hregister);
|
|
S_W : hregister:=reg32toreg16(hregister);
|
|
end;
|
|
emit_reg_reg(A_MOV,opsize,
|
|
p^.left^.location.register,hregister);
|
|
end;
|
|
LOC_MEM,LOC_REFERENCE : begin
|
|
del_reference(p^.left^.location.reference);
|
|
hregister:=getregister32;
|
|
case opsize of
|
|
S_B : hregister:=reg32toreg8(hregister);
|
|
S_W : hregister:=reg32toreg16(hregister);
|
|
end;
|
|
emit_ref_reg(A_MOV,opsize,newreference(
|
|
p^.left^.location.reference),hregister);
|
|
end;
|
|
else internalerror(2002);
|
|
end;
|
|
{ now generate the jumps }
|
|
if cs_optimize in aktglobalswitches then
|
|
begin
|
|
{ procedures are empirically passed on }
|
|
{ consumption can also be calculated }
|
|
{ but does it pay on the different }
|
|
{ processors? }
|
|
{ moreover can the size only be appro- }
|
|
{ ximated as it is not known if rel8, }
|
|
{ rel16 or rel32 jumps are used }
|
|
min_label:=case_get_min(p^.nodes);
|
|
max_label:=case_get_max(p^.nodes);
|
|
labels:=case_count_labels(p^.nodes);
|
|
{ can we omit the range check of the jump table ? }
|
|
getrange(p^.left^.resulttype,lv,hv);
|
|
jumptable_no_range:=(lv=min_label) and (hv=max_label);
|
|
{ hack a little bit, because the range can be greater }
|
|
{ than the positive range of a longint }
|
|
|
|
if (min_label<0) and (max_label>0) then
|
|
begin
|
|
{$ifdef Delphi}
|
|
if min_label=$80000000 then
|
|
dist:=Cardinal(max_label)+Cardinal($80000000)
|
|
else
|
|
dist:=Cardinal(max_label)+Cardinal(-min_label)
|
|
{$else Delphi}
|
|
if min_label=$80000000 then
|
|
dist:=dword(max_label)+dword($80000000)
|
|
else
|
|
dist:=dword(max_label)+dword(-min_label)
|
|
{$endif Delphi}
|
|
end
|
|
else
|
|
dist:=max_label-min_label;
|
|
|
|
{ optimize for size ? }
|
|
if cs_littlesize in aktglobalswitches then
|
|
begin
|
|
if (labels<=2) or
|
|
((max_label-min_label)<0) or
|
|
((max_label-min_label)>3*labels) then
|
|
{ a linear list is always smaller than a jump tree }
|
|
genlinearlist(p^.nodes)
|
|
else
|
|
{ if the labels less or more a continuum then }
|
|
genjumptable(p^.nodes,min_label,max_label);
|
|
end
|
|
else
|
|
begin
|
|
if jumptable_no_range then
|
|
max_linear_list:=4
|
|
else
|
|
max_linear_list:=2;
|
|
{ a jump table crashes the pipeline! }
|
|
if aktoptprocessor=Class386 then
|
|
inc(max_linear_list,3);
|
|
if aktoptprocessor=ClassP5 then
|
|
inc(max_linear_list,6);
|
|
if aktoptprocessor>=ClassP6 then
|
|
inc(max_linear_list,9);
|
|
|
|
if (labels<=max_linear_list) then
|
|
genlinearlist(p^.nodes)
|
|
else
|
|
begin
|
|
if (dist>4*labels) then
|
|
begin
|
|
if labels>16 then
|
|
gentreejmp(p^.nodes)
|
|
else
|
|
genlinearlist(p^.nodes);
|
|
end
|
|
else
|
|
genjumptable(p^.nodes,min_label,max_label);
|
|
end;
|
|
end;
|
|
end
|
|
else
|
|
{ it's always not bad }
|
|
genlinearlist(p^.nodes);
|
|
{$IfDef regallocfix}
|
|
ungetregister(hregister);
|
|
{$EndIf regallocfix}
|
|
|
|
|
|
{ now generate the instructions }
|
|
hp:=p^.right;
|
|
while assigned(hp) do
|
|
begin
|
|
cleartempgen;
|
|
secondpass(hp^.right);
|
|
{ don't come back to case line }
|
|
aktfilepos:=exprasmlist^.getlasttaifilepos^;
|
|
emitjmp(C_None,endlabel);
|
|
hp:=hp^.left;
|
|
end;
|
|
emitlab(elselabel);
|
|
{ ...and the else block }
|
|
if assigned(p^.elseblock) then
|
|
begin
|
|
cleartempgen;
|
|
secondpass(p^.elseblock);
|
|
end;
|
|
emitlab(endlabel);
|
|
end;
|
|
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.47 2000-01-09 12:35:02 jonas
|
|
* changed edi allocation to use getexplicitregister32/ungetregister
|
|
(adapted tgeni386 a bit for this) and enabled it by default
|
|
* fixed very big and stupid bug of mine in cg386mat that broke the
|
|
include() code (and make cycle :( ) if you compiled without
|
|
-dnewoptimizations
|
|
|
|
Revision 1.46 2000/01/09 01:44:21 jonas
|
|
+ (de)allocation info for EDI to fix reported bug on mailinglist.
|
|
Also some (de)allocation info for ESI added. Between -dallocEDI
|
|
because at this time of the night bugs could easily slip in ;)
|
|
|
|
Revision 1.45 2000/01/07 01:14:21 peter
|
|
* updated copyright to 2000
|
|
|
|
Revision 1.44 1999/12/01 22:45:54 peter
|
|
* fixed wrong assembler with in-node
|
|
|
|
Revision 1.43 1999/11/06 14:34:18 peter
|
|
* truncated log to 20 revs
|
|
|
|
Revision 1.42 1999/09/27 23:44:48 peter
|
|
* procinfo is now a pointer
|
|
* support for result setting in sub procedure
|
|
|
|
Revision 1.41 1999/09/20 16:38:52 peter
|
|
* cs_create_smart instead of cs_smartlink
|
|
* -CX is create smartlink
|
|
* -CD is create dynamic, but does nothing atm.
|
|
|
|
Revision 1.40 1999/08/25 11:59:47 jonas
|
|
* changed pai386, paippc and paiapha (same for tai*) to paicpu (taicpu)
|
|
|
|
Revision 1.39 1999/08/23 23:46:42 pierre
|
|
* del_reference moved to respect registers32 in secondin
|
|
|
|
Revision 1.38 1999/08/19 13:08:53 pierre
|
|
* emit_??? used
|
|
|
|
Revision 1.37 1999/08/04 00:22:54 florian
|
|
* renamed i386asm and i386base to cpuasm and cpubase
|
|
|
|
Revision 1.36 1999/08/03 22:02:48 peter
|
|
* moved bitmask constants to sets
|
|
* some other type/const renamings
|
|
|
|
Revision 1.35 1999/07/18 14:01:16 florian
|
|
* handling of integer and shortint in case was wrong, if a case
|
|
label was negative and a jump table was generated
|
|
|
|
Revision 1.34 1999/06/08 15:27:24 pierre
|
|
* fix for bug0258
|
|
|
|
Revision 1.33 1999/06/02 10:11:48 florian
|
|
* make cycle fixed i.e. compilation with 0.99.10
|
|
* some fixes for qword
|
|
* start of register calling conventions
|
|
|
|
Revision 1.32 1999/05/27 19:44:19 peter
|
|
* removed oldasm
|
|
* plabel -> pasmlabel
|
|
* -a switches to source writing automaticly
|
|
* assembler readers OOPed
|
|
* asmsymbol automaticly external
|
|
* jumptables and other label fixes for asm readers
|
|
|
|
Revision 1.31 1999/05/21 13:54:54 peter
|
|
* NEWLAB for label as symbol
|
|
|
|
Revision 1.30 1999/05/05 08:09:24 michael
|
|
* Changed longword to cardinal
|
|
|
|
Revision 1.29 1999/05/04 21:44:34 florian
|
|
* changes to compile it with Delphi 4.0
|
|
|
|
Revision 1.28 1999/05/01 13:24:15 peter
|
|
* merged nasm compiler
|
|
* old asm moved to oldasm/
|
|
|
|
Revision 1.27 1999/04/16 13:42:30 jonas
|
|
* more regalloc fixes (still not complete)
|
|
|
|
Revision 1.26 1999/04/09 08:36:36 peter
|
|
* fix also for -Og
|
|
|
|
Revision 1.25 1999/04/08 20:59:37 florian
|
|
* fixed problem with default properties which are a class
|
|
* case bug (from the mailing list with -O2) fixed, the
|
|
distance of the case labels can be greater than the positive
|
|
range of a longint => it is now a dword for fpc
|
|
|
|
Revision 1.24 1999/03/02 18:21:35 peter
|
|
+ flags support for add and case
|
|
|
|
Revision 1.23 1999/02/25 21:02:31 peter
|
|
* ag386bin updates
|
|
+ coff writer
|
|
|
|
}
|
|
|