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RELEASE.1.9.2
fpc/compiler/cgbase.pas
daniel cdbb601a4e * Degree=0 problem fixed 
* Degree to high problem fixed
2004-01-09 22:02:29 +00:00

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{
$Id$
Copyright (c) 1998-2002 by Florian Klaempfl
Some basic types and constants for the code generation
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.
****************************************************************************
}
{# This unit exports some types which are used across the code generator }
unit cgbase;
{$i fpcdefs.inc}
interface
uses
cpuinfo,
symconst;
type
{ Location types where value can be stored }
TCGLoc=(
LOC_INVALID, { added for tracking problems}
LOC_VOID, { no value is available }
LOC_CONSTANT, { constant value }
LOC_JUMP, { boolean results only, jump to false or true label }
LOC_FLAGS, { boolean results only, flags are set }
LOC_CREFERENCE, { in memory constant value reference (cannot change) }
LOC_REFERENCE, { in memory value }
LOC_REGISTER, { in a processor register }
LOC_CREGISTER, { Constant register which shouldn't be modified }
LOC_FPUREGISTER, { FPU stack }
LOC_CFPUREGISTER, { if it is a FPU register variable on the fpu stack }
LOC_MMXREGISTER, { MMX register }
{ MMX register variable }
LOC_CMMXREGISTER,
{ multimedia register }
LOC_MMREGISTER,
{ Constant multimedia reg which shouldn't be modified }
LOC_CMMREGISTER
);
{# Generic opcodes, which must be supported by all processors
}
topcg =
(
OP_NONE,
OP_ADD, { simple addition }
OP_AND, { simple logical and }
OP_DIV, { simple unsigned division }
OP_IDIV, { simple signed division }
OP_IMUL, { simple signed multiply }
OP_MUL, { simple unsigned multiply }
OP_NEG, { simple negate }
OP_NOT, { simple logical not }
OP_OR, { simple logical or }
OP_SAR, { arithmetic shift-right }
OP_SHL, { logical shift left }
OP_SHR, { logical shift right }
OP_SUB, { simple subtraction }
OP_XOR { simple exclusive or }
);
{# Generic flag values - used for jump locations }
TOpCmp =
(
OC_NONE,
OC_EQ, { equality comparison }
OC_GT, { greater than (signed) }
OC_LT, { less than (signed) }
OC_GTE, { greater or equal than (signed) }
OC_LTE, { less or equal than (signed) }
OC_NE, { not equal }
OC_BE, { less or equal than (unsigned) }
OC_B, { less than (unsigned) }
OC_AE, { greater or equal than (unsigned) }
OC_A { greater than (unsigned) }
);
{ OS_NO is also used memory references with large data that can
not be loaded in a register directly }
TCgSize = (OS_NO,
{ integer registers }
OS_8,OS_16,OS_32,OS_64,OS_S8,OS_S16,OS_S32,OS_S64,
{ single,double,extended,comp,float128 }
OS_F32,OS_F64,OS_F80,OS_C64,OS_F128,
{ multi-media sizes: split in byte, word, dword, ... }
{ entities, then the signed counterparts }
OS_M8,OS_M16,OS_M32,OS_M64,OS_M128,OS_MS8,OS_MS16,OS_MS32,
OS_MS64,OS_MS128);
{ Register types }
TRegisterType = (
R_INVALIDREGISTER, { = 0 }
R_INTREGISTER, { = 1 }
R_FPUREGISTER, { = 2 }
{ used by Intel only }
R_MMXREGISTER, { = 3 }
R_MMREGISTER, { = 4 }
R_SPECIALREGISTER, { = 5 }
R_ADDRESSREGISTER { = 6 }
);
{ Sub registers }
TSubRegister = (
R_SUBNONE, { = 0; no sub register possible }
R_SUBL, { = 1; 8 bits, Like AL }
R_SUBH, { = 2; 8 bits, Like AH }
R_SUBW, { = 3; 16 bits, Like AX }
R_SUBD, { = 4; 32 bits, Like EAX }
R_SUBQ, { = 5; 64 bits, Like RAX }
R_SUBFD { = 6; Float that allocates 2 FPU registers }
);
TSuperRegister = type word;
{
The new register coding:
SuperRegister (bits 0..15)
Subregister (bits 16..23)
Register type (bits 24..31)
TRegister is defined as an enum to make it incompatible
with TSuperRegister to avoid mixing them
}
TRegister = (
TRegisterLowEnum := Low(longint),
TRegisterHighEnum := High(longint)
);
TRegisterRec=packed record
{$ifdef FPC_BIG_ENDIAN}
regtype : Tregistertype;
subreg : Tsubregister;
supreg : Tsuperregister;
{$else FPC_BIG_ENDIAN}
supreg : Tsuperregister;
subreg : Tsubregister;
regtype : Tregistertype;
{$endif FPC_BIG_ENDIAN}
end;
{ A type to store register locations for 64 Bit values. }
{$ifdef cpu64bit}
tregister64 = tregister;
{$else cpu64bit}
tregister64 = packed record
reglo,reghi : tregister;
end;
{$endif cpu64bit}
Tregistermmxset = packed record
reg0,reg1,reg2,reg3:Tregister
end;
{ Set type definition for registers }
tcpuregisterset = set of byte;
tsuperregisterset = array[byte] of set of byte;
{ Temp types }
ttemptype = (tt_none,
tt_free,tt_normal,tt_persistent,
tt_noreuse,tt_freenoreuse);
pmmshuffle = ^tmmshuffle;
{ this record describes shuffle operations for mm operations; if a pointer a shuffle record
passed to an mm operation is nil, it means that the whole location is moved }
tmmshuffle = record
{ describes how many shuffles are actually described, if len=0 then
moving the scalar with index 0 to the scalar with index 0 is meant }
len : byte;
{ lower nibble of each entry of this array describes index of the source data index while
the upper nibble describes the destination index }
shuffles : array[1..1] of byte;
end;
Tsuperregisterarray=array[0..$ff] of Tsuperregister;
Psuperregisterarray=^Tsuperregisterarray;
Tsuperregisterworklist=object
buflength,
buflengthinc,
length:word;
buf:Psuperregisterarray;
constructor init;
constructor copyfrom(const x:Tsuperregisterworklist);
destructor done;
procedure clear;
procedure add(s:tsuperregister);
function get:tsuperregister;
procedure deleteidx(i:word);
function delete(s:tsuperregister):boolean;
end;
psuperregisterworklist=^tsuperregisterworklist;
const
{ alias for easier understanding }
R_SSEREGISTER = R_MMREGISTER;
{ Invalid register number }
RS_INVALID = high(tsuperregister);
{ Maximum number of cpu registers per register type,
this must fit in tcpuregisterset }
maxcpuregister = 32;
tcgsize2size : Array[tcgsize] of integer =
{ integer values }
(0,1,2,4,8,1,2,4,8,
{ floating point values }
4,8,EXTENDED_SIZE,8,16,
{ multimedia values }
1,2,4,8,16,1,2,4,8,16);
tfloat2tcgsize: array[tfloattype] of tcgsize =
(OS_F32,OS_F64,OS_F80,OS_C64,OS_C64,OS_F128);
tcgsize2tfloat: array[OS_F32..OS_C64] of tfloattype =
(s32real,s64real,s80real,s64comp);
{ Table to convert tcgsize variables to the correspondending
unsigned types }
tcgsize2unsigned : array[tcgsize] of tcgsize = (OS_NO,
OS_8,OS_16,OS_32,OS_64,OS_8,OS_16,OS_32,OS_64,
OS_F32,OS_F64,OS_F80,OS_C64,OS_F128,
OS_M8,OS_M16,OS_M32,OS_M64,OS_M128,OS_M8,OS_M16,OS_M32,
OS_M64,OS_M128);
tcgloc2str : array[TCGLoc] of string[11] = (
'LOC_INVALID',
'LOC_VOID',
'LOC_CONST',
'LOC_JUMP',
'LOC_FLAGS',
'LOC_CREF',
'LOC_REF',
'LOC_REG',
'LOC_CREG',
'LOC_FPUREG',
'LOC_CFPUREG',
'LOC_MMXREG',
'LOC_CMMXREG',
'LOC_MMREG',
'LOC_CMMREG');
var
mms_movescalar : pmmshuffle;
procedure supregset_reset(var regs:tsuperregisterset;setall:boolean);{$ifdef USEINLINE}inline;{$endif}
procedure supregset_include(var regs:tsuperregisterset;s:tsuperregister);{$ifdef USEINLINE}inline;{$endif}
procedure supregset_exclude(var regs:tsuperregisterset;s:tsuperregister);{$ifdef USEINLINE}inline;{$endif}
function supregset_in(const regs:tsuperregisterset;s:tsuperregister):boolean;{$ifdef USEINLINE}inline;{$endif}
function newreg(rt:tregistertype;sr:tsuperregister;sb:tsubregister):tregister;{$ifdef USEINLINE}inline;{$endif}
function getsubreg(r:tregister):tsubregister;{$ifdef USEINLINE}inline;{$endif}
function getsupreg(r:tregister):tsuperregister;{$ifdef USEINLINE}inline;{$endif}
function getregtype(r:tregister):tregistertype;{$ifdef USEINLINE}inline;{$endif}
procedure setsubreg(var r:tregister;sr:tsubregister);{$ifdef USEINLINE}inline;{$endif}
procedure setsupreg(var r:tregister;sr:tsuperregister);{$ifdef USEINLINE}inline;{$endif}
function generic_regname(r:tregister):string;
{# From a constant numeric value, return the abstract code generator
size.
}
function int_cgsize(const a: aword): tcgsize;{$ifdef USEINLINE}inline;{$endif}
{ return the inverse condition of opcmp }
function inverse_opcmp(opcmp: topcmp): topcmp;{$ifdef USEINLINE}inline;{$endif}
{ return whether op is commutative }
function commutativeop(op: topcg): boolean;{$ifdef USEINLINE}inline;{$endif}
{ returns true, if shuffle describes a real shuffle operation and not only a move }
function realshuffle(shuffle : pmmshuffle) : boolean;
{ returns true, if the shuffle describes only a move of the scalar at index 0 }
function shufflescalar(shuffle : pmmshuffle) : boolean;
{ removes shuffling from shuffle, this means that the destenation index of each shuffle is copied to
the source }
procedure removeshuffles(var shuffle : tmmshuffle);
implementation
uses
verbose;
{******************************************************************************
tsuperregisterworklist
******************************************************************************}
constructor tsuperregisterworklist.init;
begin
length:=0;
buflength:=0;
buflengthinc:=16;
buf:=nil;
end;
constructor Tsuperregisterworklist.copyfrom(const x:Tsuperregisterworklist);
begin
self:=x;
if x.buf<>nil then
begin
getmem(buf,buflength*sizeof(Tsuperregister));
move(x.buf^,buf^,length*sizeof(Tsuperregister));
end;
end;
destructor tsuperregisterworklist.done;
begin
if assigned(buf) then
freemem(buf);
end;
procedure tsuperregisterworklist.add(s:tsuperregister);
begin
inc(length);
{ Need to increase buffer length? }
if length>=buflength then
begin
inc(buflength,buflengthinc);
buflengthinc:=buflengthinc*2;
if buflengthinc>256 then
buflengthinc:=256;
reallocmem(buf,buflength*sizeof(Tsuperregister));
end;
buf^[length-1]:=s;
end;
procedure tsuperregisterworklist.clear;
begin
length:=0;
end;
procedure tsuperregisterworklist.deleteidx(i:word);
begin
if length=0 then
internalerror(200310144);
buf^[i]:=buf^[length-1];
dec(length);
end;
function tsuperregisterworklist.get:tsuperregister;
begin
if length=0 then
internalerror(200310142);
get:=buf^[0];
buf^[0]:=buf^[length-1];
dec(length);
end;
function tsuperregisterworklist.delete(s:tsuperregister):boolean;
var i:word;
begin
delete:=false;
for i:=1 to length do
if buf^[i-1]=s then
begin
deleteidx(i-1);
delete:=true;
break;
end;
end;
procedure supregset_reset(var regs:tsuperregisterset;setall:boolean);{$ifdef USEINLINE}inline;{$endif}
var
b : byte;
begin
if setall then
b:=$ff
else
b:=0;
fillchar(regs,sizeof(regs),b);
end;
procedure supregset_include(var regs:tsuperregisterset;s:tsuperregister);{$ifdef USEINLINE}inline;{$endif}
begin
include(regs[s shr 8],(s and $ff));
end;
procedure supregset_exclude(var regs:tsuperregisterset;s:tsuperregister);{$ifdef USEINLINE}inline;{$endif}
begin
exclude(regs[s shr 8],(s and $ff));
end;
function supregset_in(const regs:tsuperregisterset;s:tsuperregister):boolean;{$ifdef USEINLINE}inline;{$endif}
begin
result:=(s and $ff) in regs[s shr 8];
end;
function newreg(rt:tregistertype;sr:tsuperregister;sb:tsubregister):tregister;{$ifdef USEINLINE}inline;{$endif}
begin
tregisterrec(result).regtype:=rt;
tregisterrec(result).supreg:=sr;
tregisterrec(result).subreg:=sb;
end;
function getsubreg(r:tregister):tsubregister;{$ifdef USEINLINE}inline;{$endif}
begin
result:=tregisterrec(r).subreg;
end;
function getsupreg(r:tregister):tsuperregister;{$ifdef USEINLINE}inline;{$endif}
begin
result:=tregisterrec(r).supreg;
end;
function getregtype(r:tregister):tregistertype;{$ifdef USEINLINE}inline;{$endif}
begin
result:=tregisterrec(r).regtype;
end;
procedure setsubreg(var r:tregister;sr:tsubregister);{$ifdef USEINLINE}inline;{$endif}
begin
tregisterrec(r).subreg:=sr;
end;
procedure setsupreg(var r:tregister;sr:tsuperregister);{$ifdef USEINLINE}inline;{$endif}
begin
tregisterrec(r).supreg:=sr;
end;
function generic_regname(r:tregister):string;
var
t,sub : char;
nr : string[12];
begin
case getregtype(r) of
R_INTREGISTER:
t:='i';
R_FPUREGISTER:
t:='f';
R_MMXREGISTER:
t:='x';
R_MMREGISTER:
t:='m';
else
begin
result:='INVALID';
exit;
end;
end;
str(getsupreg(r),nr);
case getsubreg(r) of
R_SUBNONE:
sub:=' ';
R_SUBL:
sub:='l';
R_SUBH:
sub:='h';
R_SUBW:
sub:='w';
R_SUBD:
sub:='d';
R_SUBQ:
sub:='q';
R_SUBFD:
sub:='f';
else
internalerror(200308252);
end;
if sub<>' ' then
result:=t+'reg'+nr+sub
else
result:=t+'reg'+nr;
end;
function int_cgsize(const a: aword): tcgsize;{$ifdef USEINLINE}inline;{$endif}
const
size2cgsize : array[0..8] of tcgsize = (
OS_NO,OS_8,OS_16,OS_32,OS_32,OS_64,OS_64,OS_64,OS_64
);
begin
if a>8 then
result:=OS_NO
else
result:=size2cgsize[a];
end;
function inverse_opcmp(opcmp: topcmp): topcmp;{$ifdef USEINLINE}inline;{$endif}
const
list: array[TOpCmp] of TOpCmp =
(OC_NONE,OC_NE,OC_LTE,OC_GTE,OC_LT,OC_GT,OC_EQ,OC_A,OC_AE,
OC_B,OC_BE);
begin
inverse_opcmp := list[opcmp];
end;
function commutativeop(op: topcg): boolean;{$ifdef USEINLINE}inline;{$endif}
const
list: array[topcg] of boolean =
(true,true,true,false,false,true,true,false,false,
true,false,false,false,false,true);
begin
commutativeop := list[op];
end;
function realshuffle(shuffle : pmmshuffle) : boolean;
var
i : longint;
begin
realshuffle:=true;
if (shuffle=nil) or (shuffle^.len=0) then
realshuffle:=false
else
begin
for i:=1 to shuffle^.len do
begin
if (shuffle^.shuffles[i] and $f)<>((shuffle^.shuffles[i] and $f0) shr 8) then
exit;
end;
realshuffle:=false;
end;
end;
function shufflescalar(shuffle : pmmshuffle) : boolean;
begin
result:=shuffle^.len=0;
end;
procedure removeshuffles(var shuffle : tmmshuffle);
var
i : longint;
begin
if shuffle.len=0 then
exit;
for i:=1 to shuffle.len do
shuffle.shuffles[i]:=(shuffle.shuffles[i] and $f0) or ((shuffle.shuffles[i] and $f0) shr 8);
end;
initialization
new(mms_movescalar);
mms_movescalar^.len:=0;
finalization
dispose(mms_movescalar);
end.
{
$Log$
Revision 1.84 2004-01-09 22:02:29 daniel
* Degree=0 problem fixed
* Degree to high problem fixed
Revision 1.83 2003/12/25 01:07:09 florian
+ $fputype directive support
+ single data type operations with sse unit
* fixed more x86-64 stuff
Revision 1.82 2003/12/22 23:10:21 peter
* use low(longint) instead of $8000000
Revision 1.81 2003/12/21 19:42:42 florian
* fixed ppc inlining stuff
* fixed wrong unit writing
+ added some sse stuff
Revision 1.80 2003/12/19 22:08:44 daniel
* Some work to restore the MMX capabilities
Revision 1.79 2003/12/15 21:25:48 peter
* reg allocations for imaginary register are now inserted just
before reg allocation
* tregister changed to enum to allow compile time check
* fixed several tregister-tsuperregister errors
Revision 1.78 2003/12/14 20:24:28 daniel
* Register allocator speed optimizations
- Worklist no longer a ringbuffer
- No find operations are left
- Simplify now done in constant time
- unusedregs is now a Tsuperregisterworklist
- Microoptimizations
Revision 1.77 2003/11/04 15:35:13 peter
* fix for referencecounted temps
Revision 1.76 2003/11/03 17:48:04 peter
* int_cgsize returned garbage for a=0
Revision 1.75 2003/10/31 15:51:11 peter
* USEINLINE directive added (not enabled yet)
Revision 1.74 2003/10/30 14:56:40 mazen
+ add support for double float register vars
Revision 1.73 2003/10/29 15:07:01 mazen
* 32 registers are available
Revision 1.72 2003/10/24 15:21:31 peter
* renamed R_SUBF64 to R_SUBFD
Revision 1.71 2003/10/17 14:38:32 peter
* 64k registers supported
* fixed some memory leaks
Revision 1.70 2003/10/13 01:10:01 florian
* some ideas for mm support implemented
Revision 1.69 2003/10/11 16:06:42 florian
* fixed some MMX<->SSE
* started to fix ppc, needs an overhaul
+ stabs info improve for spilling, not sure if it works correctly/completly
- MMX_SUPPORT removed from Makefile.fpc
Revision 1.68 2003/10/09 21:31:37 daniel
* Register allocator splitted, ans abstract now
Revision 1.67 2003/10/01 20:34:48 peter
* procinfo unit contains tprocinfo
* cginfo renamed to cgbase
* moved cgmessage to verbose
* fixed ppc and sparc compiles
}
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