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55a161bbbf
fpc/compiler/sparc/ncpumat.pas
daniel 55a161bbbf * Tregister changed into a record
2003-01-08 18:43:56 +00:00

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{
$Id$
Copyright (c) 1998-2002 by Florian Klaempfl
Generate PowerPC assembler for math nodes
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit ncpumat;
{$i fpcdefs.inc}
interface
uses
node,nmat;
type
tSparcmoddivnode = class(tmoddivnode)
procedure pass_2;override;
end;
tSparcshlshrnode = class(tshlshrnode)
procedure pass_2;override;
{ everything will be handled in pass_2 }
function first_shlshr64bitint: tnode; override;
end;
tSparcunaryminusnode = class(tunaryminusnode)
procedure pass_2;override;
end;
tSparcnotnode = class(tnotnode)
procedure pass_2;override;
end;
implementation
uses
globtype,systems,
cutils,verbose,globals,
symconst,symdef,
aasmbase,aasmcpu,aasmtai,
defutil,
cgbase,cgobj,pass_1,pass_2,
ncon,
cpubase,cpuinfo,cginfo,
ncgutil,cgcpu,cg64f32,rgobj;
{*****************************************************************************
TSparcMODDIVNODE
*****************************************************************************}
procedure tSparcmoddivnode.pass_2;
const
{ signed overflow }
divops: array[boolean, boolean] of tasmop =
((A_SDIV,A_UDIV),(A_SDIVcc,A_UDIVcc));
var
power,
l1, l2 : longint;
op : tasmop;
numerator,
divider,
resultreg : tregister;
saved : tmaybesave;
begin
secondpass(left);
maybe_save(exprasmlist,right.registers32,left.location,saved);
secondpass(right);
maybe_restore(exprasmlist,left.location,saved);
location_copy(location,left.location);
{ put numerator in register }
location_force_reg(exprasmlist,left.location,
def_cgsize(left.resulttype.def),true);
location_copy(location,left.location);
numerator := location.register;
resultreg := location.register;
if (location.loc = LOC_CREGISTER) then
begin
location.loc := LOC_REGISTER;
location.register := rg.getregisterint(exprasmlist);
resultreg := location.register;
end;
if (nodetype = modn) then
begin
resultreg := cg.get_scratch_reg_int(exprasmlist);
end;
if (nodetype = divn) and
(right.nodetype = ordconstn) and
ispowerof2(tordconstnode(right).value,power) then
begin
{ From "The PowerPC Compiler Writer's Guide": }
{ This code uses the fact that, in the PowerPC architecture, }
{ the shift right algebraic instructions set the Carry bit if }
{ the source register contains a negative number and one or }
{ more 1-bits are shifted out. Otherwise, the carry bit is }
{ cleared. The addze instruction corrects the quotient, if }
{ necessary, when the dividend is negative. For example, if }
{ n = -13, (0xFFFF_FFF3), and k = 2, after executing the srawi }
{ instruction, q = -4 (0xFFFF_FFFC) and CA = 1. After executing }
{ the addze instruction, q = -3, the correct quotient. }
cg.a_op_const_reg_reg(exprasmlist,OP_SAR,OS_32,aword(power),
numerator,resultreg);
exprasmlist.concat(taicpu.op_reg_reg(A_ADD,resultreg,resultreg));
end
else
begin
{ load divider in a register if necessary }
location_force_reg(exprasmlist,right.location,
def_cgsize(right.resulttype.def),true);
divider := right.location.register;
{ needs overflow checking, (-maxlongint-1) div (-1) overflows! }
{ And on Sparc, the only way to catch a div-by-0 is by checking }
{ the overflow flag (JM) }
op := divops[is_signed(right.resulttype.def),
cs_check_overflow in aktlocalswitches];
exprasmlist.concat(taicpu.op_reg_reg_reg(op,resultreg,numerator,
divider));
if (nodetype = modn) then
begin
exprasmlist.concat(taicpu.op_reg_reg_reg(A_SMUL,resultreg,
divider,resultreg));
rg.ungetregister(exprasmlist,divider);
exprasmlist.concat(taicpu.op_reg_reg_reg(A_SUB,location.register,
numerator,resultreg));
cg.free_scratch_reg(exprasmlist,resultreg);
resultreg := location.register;
end
else
rg.ungetregister(exprasmlist,divider);
end;
{ free used registers }
if numerator.enum <> resultreg.enum then
rg.ungetregisterint(exprasmlist,numerator);
{ set result location }
location.loc:=LOC_REGISTER;
location.register:=resultreg;
cg.g_overflowcheck(exprasmlist,self);
end;
{*****************************************************************************
TSparcSHLRSHRNODE
*****************************************************************************}
function TSparcShlShrNode.first_shlshr64bitint:TNode;
begin
result := nil;
end;
procedure tSparcshlshrnode.pass_2;
var
resultreg, hregister1,hregister2,
hregisterhigh,hregisterlow : tregister;
op : topcg;
asmop1, asmop2: tasmop;
shiftval: aword;
saved : tmaybesave;
r:Tregister;
begin
secondpass(left);
maybe_save(exprasmlist,right.registers32,left.location,saved);
secondpass(right);
maybe_restore(exprasmlist,left.location,saved);
if is_64bitint(left.resulttype.def)
then
begin
location_force_reg(exprasmlist,left.location,def_cgsize(left.resulttype.def),true);
location_copy(location,left.location);
hregisterhigh := location.registerhigh;
hregisterlow := location.registerlow;
if (location.loc = LOC_CREGISTER)
then
begin
location.loc := LOC_REGISTER;
location.registerhigh := rg.getregisterint(exprasmlist);
location.registerlow := rg.getregisterint(exprasmlist);
end;
if (right.nodetype = ordconstn)
then
begin
shiftval := tordconstnode(right).value;
if tordconstnode(right).value > 31
then
begin
if nodetype = shln
then
begin
if (shiftval and 31) <> 0
then
cg.a_op_const_reg_reg(exprasmlist,OP_SHL,OS_32,shiftval and 31,hregisterlow,location.registerhigh);
cg.a_load_const_reg(exprasmlist,OS_32,0,location.registerlow);
end
else
begin
if (shiftval and 31) <> 0
then
cg.a_op_const_reg_reg(exprasmlist,OP_SHR,OS_32,shiftval and 31,hregisterhigh,location.registerlow);
cg.a_load_const_reg(exprasmlist,OS_32,0,location.registerhigh);
end;
end
else
begin
if nodetype = shln
then
begin
{exprasmlist.concat(taicpu.op_reg_reg_const_const_const(A_RLWINM,location.registerhigh,hregisterhigh,shiftval,0,31-shiftval));
exprasmlist.concat(taicpu.op_reg_reg_const_const_const(A_RLWIMI,location.registerhigh,hregisterlow,shiftval,32-shiftval,31));
exprasmlist.concat(taicpu.op_reg_reg_const_const_const(A_RLWINM,location.registerlow,hregisterlow,shiftval,0,31-shiftval));}
end
else
begin
{exprasmlist.concat(taicpu.op_reg_reg_const_const_const(A_RLWINM,location.registerlow,hregisterlow,32-shiftval,shiftval,31));
exprasmlist.concat(taicpu.op_reg_reg_const_const_const(A_RLWIMI,location.registerlow,hregisterhigh,32-shiftval,0,shiftval-1));
exprasmlist.concat(taicpu.op_reg_reg_const_const_const(A_RLWINM,location.registerhigh,hregisterhigh,32-shiftval,shiftval,31));}
end;
end;
end
else
{ no constant shiftcount }
begin
location_force_reg(exprasmlist,right.location,OS_S32,true);
hregister1 := right.location.register;
if nodetype = shln
then
begin
asmop1 := A_SLL;
asmop2 := A_SRL;
end
else
begin
asmop1 := A_SRL;
asmop2 := A_SLL;
resultreg := location.registerhigh;
location.registerhigh := location.registerlow;
location.registerlow := resultreg;
end;
r.enum:=R_G0;
rg.getexplicitregisterint(exprasmlist,R_G0);
{ exprasmlist.concat(taicpu.op_reg_reg_const(A_SUBFIC,R_0,hregister1,32));
exprasmlist.concat(taicpu.op_reg_reg_reg(asmop1,location.registerhigh,hregisterhigh,hregister1));
exprasmlist.concat(taicpu.op_reg_reg_reg(asmop2,R_0,hregisterlow,R_0));
exprasmlist.concat(taicpu.op_reg_reg_reg(A_OR,location.registerhigh,location.registerhigh,R_0));
exprasmlist.concat(taicpu.op_reg_reg_const(A_SUBI,R_0,hregister1,32));
exprasmlist.concat(taicpu.op_reg_reg_reg(asmop1,R_0,hregisterlow,R_0));
exprasmlist.concat(taicpu.op_reg_reg_reg(A_OR,location.registerhigh,location.registerhigh,R_0));
exprasmlist.concat(taicpu.op_reg_reg_reg(asmop1,location.registerlow,hregisterlow,hregister1));}
rg.ungetregister(exprasmlist,r);
if right.location.loc in [LOC_CREFERENCE,LOC_REFERENCE]
then
cg.free_scratch_reg(exprasmlist,hregister1)
else
rg.ungetregister(exprasmlist,hregister1);
end
end
else
begin
{ load left operators in a register }
location_force_reg(exprasmlist,left.location,def_cgsize(left.resulttype.def),true);
location_copy(location,left.location);
resultreg := location.register;
hregister1 := location.register;
if (location.loc = LOC_CREGISTER)
then
begin
location.loc := LOC_REGISTER;
resultreg := rg.getregisterint(exprasmlist);
location.register := resultreg;
end;
{ determine operator }
if nodetype=shln
then
op:=OP_SHL
else
op:=OP_SHR;
{ shifting by a constant directly coded: }
if (right.nodetype=ordconstn)
then
cg.a_op_const_reg_reg(exprasmlist,op,OS_32,tordconstnode(right).value and 31,hregister1,resultreg)
else
begin
{ load shift count in a register if necessary }
location_force_reg(exprasmlist,right.location,def_cgsize(right.resulttype.def),true);
hregister2 := right.location.register;
cg.a_op_reg_reg_reg(exprasmlist,op,OS_32,hregister2,hregister1,resultreg);
rg.ungetregister(exprasmlist,hregister2);
end;
end;
end;
{*****************************************************************************
TSparcUNARYMINUSNODE
*****************************************************************************}
procedure tSparcunaryminusnode.pass_2;
var
src1, src2, tmp: tregister;
op: tasmop;
begin
secondpass(left);
if is_64bitint(left.resulttype.def) then
begin
location_force_reg(exprasmlist,left.location,def_cgsize(left.resulttype.def),true);
location_copy(location,left.location);
if (location.loc = LOC_CREGISTER) then
begin
location.registerlow := rg.getregisterint(exprasmlist);
location.registerhigh := rg.getregisterint(exprasmlist);
location.loc := LOC_CREGISTER;
end;
exprasmlist.concat(taicpu.op_reg_const_reg(A_SUB,location.registerlow,0,left.location.registerlow));
if not(cs_check_overflow in aktlocalswitches) then
exprasmlist.concat(taicpu.op_reg_reg(A_SUB,location.registerhigh,left.location.registerhigh))
else
exprasmlist.concat(taicpu.op_reg_reg(A_SUB,location.registerhigh,left.location.registerhigh));
end
else
begin
location_copy(location,left.location);
location.loc:=LOC_REGISTER;
case left.location.loc of
LOC_FPUREGISTER, LOC_REGISTER:
begin
src1 := left.location.register;
location.register := src1;
end;
LOC_CFPUREGISTER, LOC_CREGISTER:
begin
src1 := left.location.register;
if left.location.loc = LOC_CREGISTER then
location.register := rg.getregisterint(exprasmlist)
else
location.register := rg.getregisterfpu(exprasmlist);
end;
LOC_REFERENCE,LOC_CREFERENCE:
begin
if (left.resulttype.def.deftype=floatdef) then
begin
src1 := rg.getregisterfpu(exprasmlist);
location.register := src1;
cg.a_loadfpu_ref_reg(exprasmlist,
def_cgsize(left.resulttype.def),
left.location.reference,src1);
end
else
begin
src1 := rg.getregisterint(exprasmlist);
location.register:= src1;
cg.a_load_ref_reg(exprasmlist,OS_32,
left.location.reference,src1);
end;
reference_release(exprasmlist,left.location.reference);
end;
end;
{ choose appropriate operand }
if left.resulttype.def.deftype <> floatdef then
begin
if not(cs_check_overflow in aktlocalswitches) then
op := A_NEG
else
op := A_NEG;
location.loc := LOC_REGISTER;
end
else
begin
op := A_NEG;
location.loc := LOC_FPUREGISTER;
end;
{ emit operation }
exprasmlist.concat(taicpu.op_reg_reg(op,location.register,src1));
end;
{ Here was a problem... }
{ Operand to be negated always }
{ seems to be converted to signed }
{ 32-bit before doing neg!! }
{ So this is useless... }
{ that's not true: -2^31 gives an overflow error if it is negated (FK) }
cg.g_overflowcheck(exprasmlist,self);
end;
{*****************************************************************************
TSparcNOTNODE
*****************************************************************************}
procedure tSparcnotnode.pass_2;
var
hl : tasmlabel;
regl, regh: tregister;
begin
if is_boolean(resulttype.def) then
begin
{ the second pass could change the location of left }
{ if it is a register variable, so we've to do }
{ this before the case statement }
if left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE,
LOC_FLAGS,LOC_REGISTER,LOC_CREGISTER] then
secondpass(left);
case left.location.loc of
LOC_JUMP :
begin
hl:=truelabel;
truelabel:=falselabel;
falselabel:=hl;
secondpass(left);
maketojumpbool(exprasmlist,left,lr_load_regvars);
hl:=truelabel;
truelabel:=falselabel;
falselabel:=hl;
end;
LOC_FLAGS :
begin
location_copy(location,left.location);
//inverse_flags(location.resflags);
end;
LOC_REGISTER, LOC_CREGISTER, LOC_REFERENCE, LOC_CREFERENCE :
begin
location_force_reg(exprasmlist,left.location,def_cgsize(left.resulttype.def),true);
exprasmlist.concat(taicpu.op_reg_const(A_SUBcc,left.location.register,0));
location_release(exprasmlist,left.location);
location_reset(location,LOC_FLAGS,OS_NO);
//location.resflags.cr:=r_NONE;
//location.resflags.flag:=F_NONE;
end;
end;
end
else if is_64bitint(left.resulttype.def) then
begin
secondpass(left);
location_force_reg(exprasmlist,left.location,def_cgsize(left.resulttype.def),false);
location_copy(location,left.location);
{ perform the NOT operation }
exprasmlist.concat(taicpu.op_reg_reg(A_NOT,location.registerhigh,
location.registerhigh));
exprasmlist.concat(taicpu.op_reg_reg(A_NOT,location.registerlow,
location.registerlow));
end
else
begin
secondpass(left);
location_force_reg(exprasmlist,left.location,def_cgsize(left.resulttype.def),false);
location_copy(location,left.location);
if location.loc=LOC_CREGISTER then
location.register := rg.getregisterint(exprasmlist);
{ perform the NOT operation }
exprasmlist.concat(taicpu.op_reg_reg(A_NOT,location.register,
left.location.register));
end;
end;
begin
cmoddivnode:=tSparcmoddivnode;
cshlshrnode:=tSparcshlshrnode;
cunaryminusnode:=tSparcunaryminusnode;
cnotnode:=tSparcnotnode;
end.
{
$Log$
Revision 1.3 2003-01-08 18:43:58 daniel
* Tregister changed into a record
Revision 1.2 2002/12/30 21:17:22 mazen
- unit cga no more used in sparc compiler.
Revision 1.1 2002/12/21 23:22:59 mazen
+ added shift support
Revision 1.20 2002/11/25 17:43:28 peter
* splitted defbase in defutil,symutil,defcmp
* merged isconvertable and is_equal into compare_defs(_ext)
* made operator search faster by walking the list only once
Revision 1.19 2002/09/10 21:21:29 jonas
* fixed unary minus of 64bit values
Revision 1.18 2002/09/07 15:25:14 peter
* old logs removed and tabs fixed
Revision 1.17 2002/08/15 15:15:55 carl
* jmpbuf size allocation for exceptions is now cpu specific (as it should)
* more generic nodes for maths
* several fixes for better m68k support
Revision 1.16 2002/08/10 17:15:31 jonas
* various fixes and optimizations
Revision 1.15 2002/07/26 10:48:34 jonas
* fixed bug in shl/shr code
Revision 1.14 2002/07/20 11:58:05 florian
* types.pas renamed to defbase.pas because D6 contains a types
unit so this would conflicts if D6 programms are compiled
+ Willamette/SSE2 instructions to assembler added
Revision 1.13 2002/07/11 07:41:27 jonas
* fixed tSparcmoddivnode
* fixed 64bit parts of tSparcshlshrnode
Revision 1.12 2002/07/09 19:45:01 jonas
* unarynminus and shlshr node fixed for 32bit and smaller ordinals
* small fixes in the assembler writer
* changed scratch registers, because they were used by the linker (r11
and r12) and by the abi under linux (r31)
Revision 1.11 2002/07/07 09:44:32 florian
* powerpc target fixed, very simple units can be compiled
Revision 1.10 2002/05/20 13:30:42 carl
* bugfix of hdisponen (base must be set, not index)
* more portability fixes
Revision 1.9 2002/05/18 13:34:26 peter
* readded missing revisions
Revision 1.8 2002/05/16 19:46:53 carl
+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
+ try to fix temp allocation (still in ifdef)
+ generic constructor calls
+ start of tassembler / tmodulebase class cleanup
Revision 1.5 2002/05/13 19:52:46 peter
* a ppcSparc can be build again
Revision 1.4 2002/04/21 15:48:39 carl
* some small updates according to i386 version
Revision 1.3 2002/04/06 18:13:02 jonas
* several powerpc-related additions and fixes
Revision 1.2 2002/01/03 14:57:52 jonas
* completed (not compilale yet though)
}
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