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fpc/compiler/cgbase.pas
peter 70fe77ca7c * procinfo unit contains tprocinfo 
* cginfo renamed to cgbase
  * moved cgmessage to verbose
  * fixed ppc and sparc compiles
2003-10-01 20:34:48 +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,
LOC_SSEREGISTER,
LOC_CSSEREGISTER,
{ 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 }
);
TSuperRegister = type byte;
{
The new register coding:
SuperRegister (bits 0..7)
Unused (bits 8..15)
Subregister (bits 16..23)
Register type (bits 24..31)
}
TRegister = type cardinal;
TRegisterRec=packed record
{$ifdef FPC_BIG_ENDIAN}
regtype : Tregistertype;
subreg : Tsubregister;
unused : byte;
supreg : Tsuperregister;
{$else FPC_BIG_ENDIAN}
supreg : Tsuperregister;
unused : byte;
subreg : Tsubregister;
regtype : Tregistertype;
{$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}
{ Set type definition for registers }
tsuperregisterset = set of tsuperregister;
{ Temp types }
ttemptype = (tt_none,
tt_free,tt_normal,tt_persistent,
tt_noreuse,tt_freenoreuse,
tt_ansistring,tt_freeansistring,
tt_widestring,tt_freewidestring,
tt_interfacecom,tt_freeinterfacecom);
ttemptypeset = set of ttemptype;
const
{ Invalid register number }
RS_INVALID = $ff;
tcgsize2size : Array[tcgsize] of integer =
{ integer values }
(0,1,2,4,8,1,2,4,8,
{ floating point values }
4,8,EXTENDED_SIZE,8,16,
{ multimedia values }
1,2,4,8,16,1,2,4,8,16);
tfloat2tcgsize: array[tfloattype] of tcgsize =
(OS_F32,OS_F64,OS_F80,OS_C64,OS_C64,OS_F128);
tcgsize2tfloat: array[OS_F32..OS_C64] of tfloattype =
(s32real,s64real,s80real,s64comp);
{ Table to convert tcgsize variables to the correspondending
unsigned types }
tcgsize2unsigned : array[tcgsize] of tcgsize = (OS_NO,
OS_8,OS_16,OS_32,OS_64,OS_8,OS_16,OS_32,OS_64,
OS_F32,OS_F64,OS_F80,OS_C64,OS_F128,
OS_M8,OS_M16,OS_M32,OS_M64,OS_M128,OS_M8,OS_M16,OS_M32,
OS_M64,OS_M128);
tcgloc2str : array[TCGLoc] of string[11] = (
'LOC_INVALID',
'LOC_VOID',
'LOC_CONST',
'LOC_JUMP',
'LOC_FLAGS',
'LOC_CREF',
'LOC_REF',
'LOC_REG',
'LOC_CREG',
'LOC_FPUREG',
'LOC_CFPUREG',
'LOC_MMXREG',
'LOC_CMMXREG',
'LOC_SSEREG',
'LOC_CSSEREG',
'LOC_MMREG',
'LOC_CMMREG');
function newreg(rt:tregistertype;sr:tsuperregister;sb:tsubregister):tregister;{$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;{$endif}
function generic_regname(r:tregister):string;
{# From a constant numeric value, return the abstract code generator
size.
}
function int_cgsize(const a: aword): tcgsize;
{ return the inverse condition of opcmp }
function inverse_opcmp(opcmp: topcmp): topcmp;
{ return whether op is commutative }
function commutativeop(op: topcg): boolean;
implementation
uses
verbose;
function newreg(rt:tregistertype;sr:tsuperregister;sb:tsubregister):tregister;{$ifdef USEINLINE}inline;{$endif}
begin
tregisterrec(result).regtype:=rt;
tregisterrec(result).unused:=0;
tregisterrec(result).supreg:=sr;
tregisterrec(result).subreg:=sb;
end;
function getsubreg(r:tregister):tsubregister;{$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';
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;
begin
if a > 8 then
begin
int_cgsize := OS_NO;
exit;
end;
case byte(a) of
1 :
result := OS_8;
2 :
result := OS_16;
3,4 :
result := OS_32;
5..8 :
result := OS_64;
end;
end;
function inverse_opcmp(opcmp: topcmp): topcmp;
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;
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;
end.
{
$Log$
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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