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81 lines
2.4 KiB
ObjectPascal
81 lines
2.4 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Helper routines for register allocator
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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 rgbase;
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{$i fpcdefs.inc}
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interface
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uses
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cpuBase,cgBase;
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type
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TRegNameTable = array[tregisterindex] of string[19];
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TRegisterIndexTable = array[tregisterindex] of tregisterindex;
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function findreg_by_number_table(r:Tregister;const regnumber_index:TRegisterIndexTable):tregisterindex;
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function findreg_by_name_table(const s:string;const regname_table:TRegNameTable;const regname_index:TRegisterIndexTable):tregisterindex;
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implementation
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function findreg_by_name_table(const s:string;const regname_table:TRegNameTable;const regname_index:TRegisterIndexTable):tregisterindex;
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var
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i,p,q : tregisterindex;
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begin
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p:=Low(tregisterindex);
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q:=high(tregisterindex);
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repeat
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i:=(p+q) shr 1;
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if s>regname_table[regname_index[i]] then
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p:=i+1
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else
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q:=i;
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until p=q;
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if regname_table[regname_index[p]]=s then
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result:=regname_index[p]
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else
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result:=0;
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end;
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function findreg_by_number_table(r:Tregister;const regnumber_index:TRegisterIndexTable):tregisterindex;
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var
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i,p,q : longint;
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begin
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p:=Low(tregisterindex);
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q:=high(tregisterindex);
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repeat
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i:=(p+q) shr 1;
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if r>regnumber_table[regnumber_index[i]] then
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p:=i+1
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else
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q:=i;
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until p=q;
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if regnumber_table[regnumber_index[p]]=r then
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result:=regnumber_index[p]
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else
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result:=0;
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end;
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end.
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