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f6b3e2e37f
* moved more tables from cpubase to cpuasm
* tai_align_abstract moved to tainst, cpuasm must define
the tai_align class now, which may be empty
357 lines
9.7 KiB
ObjectPascal
357 lines
9.7 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2000 by Michael Van Canneyt
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Contains a generic assembler instruction object;
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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 tainst;
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{$i defines.inc}
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interface
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Uses
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cpuinfo,cpubase,aasm,cclasses;
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Type
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tairegalloc = class(tai)
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allocation : boolean;
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reg : tregister;
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constructor alloc(r : tregister);
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constructor dealloc(r : tregister);
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end;
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taicpu_abstract = class(tai)
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condition : TAsmCond;
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ops : longint;
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oper : array[0..max_operands-1] of toper;
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opcode : tasmop;
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{$ifdef i386}
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segprefix : tregister;
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{$endif i386}
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is_jmp : boolean; { is this instruction a jump? (needed for optimizer) }
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Constructor Create(op : tasmop);
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Destructor Destroy;override;
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function getcopy:tlinkedlistitem;override;
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procedure loadconst(opidx:longint;l:aword);
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procedure loadsymbol(opidx:longint;s:tasmsymbol;sofs:longint);
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procedure loadref(opidx:longint;const r:treference);
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procedure loadreg(opidx:longint;r:tregister);
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procedure loadoper(opidx:longint;o:toper);
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procedure SetCondition(const c:TAsmCond);
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end;
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{ alignment for operator }
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tai_align_abstract = class(tai)
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buf : array[0..63] of char; { buf used for fill }
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aligntype : byte; { 1 = no align, 2 = word align, 4 = dword align }
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fillsize : byte; { real size to fill }
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fillop : byte; { value to fill with - optional }
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use_op : boolean;
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constructor Create(b:byte);
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constructor Create_op(b: byte; _op: byte);
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function getfillbuf:pchar;virtual;
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end;
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implementation
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uses
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verbose;
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{*****************************************************************************
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TaiRegAlloc
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*****************************************************************************}
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constructor tairegalloc.alloc(r : tregister);
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begin
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inherited create;
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typ:=ait_regalloc;
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allocation:=true;
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reg:=r;
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end;
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constructor tairegalloc.dealloc(r : tregister);
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begin
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inherited create;
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typ:=ait_regalloc;
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allocation:=false;
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reg:=r;
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end;
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{*****************************************************************************
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TaiInstruction
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*****************************************************************************}
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constructor taicpu_abstract.Create(op : tasmop);
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begin
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inherited create;
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typ:=ait_instruction;
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is_jmp:=false;
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opcode:=op;
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ops:=0;
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fillchar(condition,sizeof(condition),0);
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fillchar(oper,sizeof(oper),0);
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end;
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destructor taicpu_abstract.Destroy;
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var
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i : longint;
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begin
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for i:=0 to ops-1 do
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case oper[i].typ of
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top_ref:
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dispose(oper[i].ref);
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top_symbol:
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dec(tasmsymbol(oper[i].sym).refs);
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end;
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inherited destroy;
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end;
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{ ---------------------------------------------------------------------
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Loading of operands.
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---------------------------------------------------------------------}
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procedure taicpu_abstract.loadconst(opidx:longint;l:aword);
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begin
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if opidx>=ops then
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ops:=opidx+1;
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with oper[opidx] do
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begin
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if typ=top_ref then
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dispose(ref);
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val:=l;
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typ:=top_const;
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end;
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end;
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procedure taicpu_abstract.loadsymbol(opidx:longint;s:tasmsymbol;sofs:longint);
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begin
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if not assigned(s) then
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internalerror(200204251);
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if opidx>=ops then
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ops:=opidx+1;
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with oper[opidx] do
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begin
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if typ=top_ref then
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dispose(ref);
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sym:=s;
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symofs:=sofs;
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typ:=top_symbol;
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end;
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inc(s.refs);
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end;
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procedure taicpu_abstract.loadref(opidx:longint;const r:treference);
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begin
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if opidx>=ops then
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ops:=opidx+1;
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with oper[opidx] do
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begin
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if typ<>top_ref then
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new(ref);
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ref^:=r;
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{$ifdef i386}
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{ We allow this exception for i386, since overloading this would be
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too much of a a speed penalty}
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if not(ref^.segment in [R_DS,R_NO]) then
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segprefix:=ref^.segment;
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{$endif}
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typ:=top_ref;
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{ mark symbol as used }
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if assigned(ref^.symbol) then
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inc(ref^.symbol.refs);
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end;
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end;
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procedure taicpu_abstract.loadreg(opidx:longint;r:tregister);
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begin
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if opidx>=ops then
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ops:=opidx+1;
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with oper[opidx] do
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begin
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if typ=top_ref then
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dispose(ref);
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reg:=r;
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typ:=top_reg;
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end;
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end;
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procedure taicpu_abstract.loadoper(opidx:longint;o:toper);
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begin
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if opidx>=ops then
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ops:=opidx+1;
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if oper[opidx].typ=top_ref then
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dispose(oper[opidx].ref);
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oper[opidx]:=o;
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{ copy also the reference }
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if oper[opidx].typ=top_ref then
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begin
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new(oper[opidx].ref);
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oper[opidx].ref^:=o.ref^;
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end;
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end;
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{ ---------------------------------------------------------------------
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Miscellaneous methods.
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---------------------------------------------------------------------}
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procedure taicpu_abstract.SetCondition(const c:TAsmCond);
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begin
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condition:=c;
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end;
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Function taicpu_abstract.getcopy:tlinkedlistitem;
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var
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i : longint;
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p : tlinkedlistitem;
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begin
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p:=inherited getcopy;
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{ make a copy of the references }
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for i:=1 to ops do
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if (taicpu_abstract(p).oper[i-1].typ=top_ref) then
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begin
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new(taicpu_abstract(p).oper[i-1].ref);
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taicpu_abstract(p).oper[i-1].ref^:=oper[i-1].ref^;
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end;
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getcopy:=p;
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end;
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{****************************************************************************
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tai_align_abstract
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****************************************************************************}
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constructor tai_align_abstract.Create(b: byte);
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begin
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inherited Create;
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typ:=ait_align;
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if b in [1,2,4,8,16,32] then
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aligntype := b
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else
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aligntype := 1;
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fillsize:=0;
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fillop:=0;
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use_op:=false;
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end;
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constructor tai_align_abstract.Create_op(b: byte; _op: byte);
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begin
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inherited Create;
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typ:=ait_align;
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if b in [1,2,4,8,16,32] then
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aligntype := b
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else
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aligntype := 1;
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fillsize:=0;
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fillop:=_op;
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use_op:=true;
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fillchar(buf,sizeof(buf),_op)
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end;
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function tai_align_abstract.getfillbuf:pchar;
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begin
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getfillbuf:=@buf;
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end;
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end.
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{
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$Log$
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Revision 1.6 2002-05-14 17:28:09 peter
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* synchronized cpubase between powerpc and i386
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* moved more tables from cpubase to cpuasm
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* tai_align_abstract moved to tainst, cpuasm must define
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the tai_align class now, which may be empty
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Revision 1.5 2002/04/25 20:16:39 peter
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* moved more routines from cga/n386util
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Revision 1.4 2002/04/02 17:11:32 peter
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* tlocation,treference update
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* LOC_CONSTANT added for better constant handling
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* secondadd splitted in multiple routines
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* location_force_reg added for loading a location to a register
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of a specified size
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* secondassignment parses now first the right and then the left node
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(this is compatible with Kylix). This saves a lot of push/pop especially
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with string operations
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* adapted some routines to use the new cg methods
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Revision 1.3 2001/12/29 16:29:08 jonas
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* fixed stupid copy-paste bug
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Revision 1.2 2001/12/29 15:28:57 jonas
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* powerpc/cgcpu.pas compiles :)
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* several powerpc-related fixes
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* cpuasm unit is now based on common tainst unit
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+ nppcmat unit for powerpc (almost complete)
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Revision 1.1 2001/08/26 13:36:52 florian
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* some cg reorganisation
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* some PPC updates
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Revision 1.1 2000/07/13 06:30:08 michael
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+ Initial import
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Revision 1.6 2000/01/07 01:14:54 peter
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* updated copyright to 2000
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Revision 1.5 1999/09/10 18:48:11 florian
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* some bug fixes (e.g. must_be_valid and procinfo.funcret_is_valid)
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* most things for stored properties fixed
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Revision 1.4 1999/09/03 13:10:11 jonas
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* condition is now zeroed using fillchar
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because on powerpc it's a record now
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Revision 1.3 1999/08/26 14:52:59 jonas
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* added segprefix field for i386 in taicpu_abstract object
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Revision 1.2 1999/08/06 16:38:37 jonas
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* declared getcopy virtual, since it's already declared as such
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in cobjects.pas (FPC doesn't error on that, TP does)
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Revision 1.1 1999/08/06 16:04:05 michael
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+ introduced taicpu_abstract
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}
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