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176d8434e4
+ Enable registers %i0..%i5 and %o7 for use by reg.allocator. Some notable properties of this implementation are: o pi_needs_got flag can be safely set during pass 2, so not setting it occasionally in pass 1 does not result in internal error. o Reg.allocator configuration is independent from PIC. If procedure requires GOT, register %l7 is allocated at the prologue, making it unavailable to RA. o GOT is stored in fixed %l7 register, but it is trivial to switch over to virtual register. git-svn-id: trunk@26293 -
82 lines
2.3 KiB
ObjectPascal
82 lines
2.3 KiB
ObjectPascal
{
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Copyright (c) 2002 by Florian Klaempfl
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This unit contains the CPU specific part of tprocinfo
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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 cpupi;
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{$i fpcdefs.inc}
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interface
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uses
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cutils,
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procinfo,cpuinfo,
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psub;
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type
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TSparcProcInfo=class(tcgprocinfo)
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public
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constructor create(aparent:tprocinfo);override;
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function calc_stackframe_size:longint;override;
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end;
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implementation
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uses
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systems,globals,
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cpubase,cgbase,
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tgobj,paramgr,symconst;
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constructor tsparcprocinfo.create(aparent:tprocinfo);
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begin
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inherited create(aparent);
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maxpushedparasize:=0;
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got:=NR_L7;
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end;
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function TSparcProcInfo.calc_stackframe_size:longint;
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begin
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{
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Stackframe layout:
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%fp
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<locals>
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<temp>
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<arguments 6-n for calling>
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%sp+92
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<space for arguments 0-5> \
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<return pointer for calling> | included in first_parm_offset
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<register window save area for calling> /
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%sp
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Alignment must be the max available, as doubles require
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8 byte alignment
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}
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if (po_nostackframe in procdef.procoptions) then
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result:=Align(tg.direction*tg.lasttemp+maxpushedparasize,current_settings.alignment.localalignmax)
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else
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result:=Align(tg.direction*tg.lasttemp+maxpushedparasize+target_info.first_parm_offset,current_settings.alignment.localalignmax);
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end;
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begin
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cprocinfo:=TSparcProcInfo;
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end.
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