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https://gitlab.com/freepascal.org/fpc/source.git
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c84ec623dd
longer aligns the temp offset in case it's odd (not required for
jvm)
* ignore the "def" argument in alloctemp() for the jvm since all stack
slots can be reused for anything there, and reformatted its alloctemp()
git-svn-id: branches/jvmbackend@18297 -
79 lines
2.2 KiB
ObjectPascal
79 lines
2.2 KiB
ObjectPascal
{
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Copyright (C) 2010 by Jonas Maebe
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This unit handles the temporary variables for the JVM
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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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{
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This unit handles the temporary variables for the JVM.
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}
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unit tgcpu;
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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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aasmdata,
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symtype,tgobj;
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type
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{ ttgjvm }
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ttgjvm = class(ttgobj)
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protected
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function alloctemp(list: TAsmList; size, alignment: longint; temptype: ttemptype; def: tdef): longint; override;
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public
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procedure setfirsttemp(l : longint); override;
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end;
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implementation
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uses
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verbose;
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{ ttgjvm }
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function ttgjvm.alloctemp(list: TAsmList; size, alignment: longint; temptype: ttemptype; def: tdef): longint;
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begin
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{ the JVM only supports 1 slot (= 4 bytes in FPC) and 2 slot (= 8 bytes in
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FPC) temps on the stack. double and int64 are 2 slots, the rest is one slot.
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There are no problems with reusing the same slot for a value of a different
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type. There are no alignment requirements either. }
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if size<4 then
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size:=4;
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if not(size in [4,8]) then
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internalerror(2010121401);
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{ don't pass on "def", since we don't care if a slot is used again for a
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different type }
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result:=inherited alloctemp(list, size shr 2, 1, temptype, nil);
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end;
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procedure ttgjvm.setfirsttemp(l: longint);
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begin
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firsttemp:=l;
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lasttemp:=l;
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end;
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begin
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tgobjclass:=ttgjvm;
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end.
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