{
$Id: cpubase.pas,v 1.22 2003/12/26 14:02:30 peter Exp $
Copyright (c) 1998-2002 by Florian Klaempfl and Peter Vreman
Contains the base types for the ARM
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.
****************************************************************************
}
{# Base unit for processor information. This unit contains
enumerations of registers, opcodes, sizes, and other
such things which are processor specific.
}
unit cpubase;
{$i fpcdefs.inc}
interface
uses
cutils,cclasses,
globtype,globals,
cpuinfo,
aasmbase,
cgbase
{$ifdef delphi}
,dmisc
{$endif}
;
{*****************************************************************************
Assembler Opcodes
*****************************************************************************}
type
TAsmOp=(A_None,A_ADC,A_ADD,A_AND,A_N,A_BIC,A_BKPT,A_B,A_BL,A_BLX,A_BX,
A_CDP,A_CDP2,A_CLZ,A_CMN,A_CMP,A_EOR,A_LDC,_A_LDC2,
A_LDM,A_LDR,A_LDRB,A_LDRD,A_LDRBT,A_LDRH,A_LDRSB,
A_LDRSH,A_LDRT,A_MCR,A_MCR2,A_MCRR,A_MLA,A_MOV,
A_MRC,A_MRC2,A_MRRC,A_RS,A_MSR,A_MUL,A_MVN,
A_ORR,A_PLD,A_QADD,A_QDADD,A_QDSUB,A_QSUB,A_RSB,A_RSC,
A_SBC,A_SMLAL,A_SMULL,A_SMUL,
A_SMULW,A_STC,A_STC2,A_STM,A_STR,A_STRB,A_STRBT,A_STRD,
A_STRH,A_STRT,A_SUB,A_SWI,A_SWP,A_SWPB,A_TEQ,A_TST,
A_UMLAL,A_UMULL,
{ FPA coprocessor instructions }
A_LDF,A_STF,A_LFM,A_SFM,A_FLT,A_FIX,A_WFS,A_RFS,A_RFC,
A_ADF,A_DVF,A_FDV,A_FML,A_FRD,A_MUF,A_POL,A_PW,A_RDF,
A_RMF,A_RPW,A_RSF,A_SUF,A_ABS,A_ACS,A_ASN,A_ATN,A_COS,
A_EXP,A_LOG,A_LGN,A_MVF,A_MNF,A_NRM,A_RND,A_SIN,A_SQT,A_TAN,A_URD,
A_CMF,A_CNF
{ VPA coprocessor codes }
);
{ This should define the array of instructions as string }
op2strtable=array[tasmop] of string[11];
const
{ First value of opcode enumeration }
firstop = low(tasmop);
{ Last value of opcode enumeration }
lastop = high(tasmop);
{*****************************************************************************
Registers
*****************************************************************************}
type
{ Number of registers used for indexing in tables }
tregisterindex=0..{$i rarmnor.inc}-1;
const
{ Available Superregisters }
{$i rarmsup.inc}
RS_PC = RS_R15;
{ No Subregisters }
R_SUBWHOLE = R_SUBNONE;
{ Available Registers }
{$i rarmcon.inc}
{ aliases }
NR_PC = NR_R15;
{ Integer Super registers first and last }
first_int_supreg = RS_R0;
first_int_imreg = $10;
{ Float Super register first and last }
first_fpu_supreg = RS_F0;
first_fpu_imreg = $08;
{ MM Super register first and last }
first_mm_supreg = RS_S0;
first_mm_imreg = $20;
{$warning TODO Calculate bsstart}
regnumber_count_bsstart = 64;
regnumber_table : array[tregisterindex] of tregister = (
{$i rarmnum.inc}
);
regstabs_table : array[tregisterindex] of shortint = (
{$i rarmsta.inc}
);
{ registers which may be destroyed by calls }
VOLATILE_INTREGISTERS = [RS_R0..RS_R3,RS_R12..RS_R15];
VOLATILE_FPUREGISTERS = [RS_F0..RS_F3];
type
totherregisterset = set of tregisterindex;
{*****************************************************************************
Instruction post fixes
*****************************************************************************}
type
{ ARM instructions load/store and arithmetic instructions
can have several instruction post fixes which are collected
in this enumeration
}
TOpPostfix = (PF_None,
{ update condition flags
or floating point single }
PF_S,
{ floating point size }
PF_D,PF_E,PF_P,PF_EP,
{ load/store }
PF_B,PF_SB,PF_BT,PF_H,PF_SH,PF_T,
{ multiple load/store address modes }
PF_IA,PF_IB,PF_DA,PF_DB,PF_FD,PF_FA,PF_ED,PF_EA
);
TRoundingMode = (RM_None,RM_P,RM_M,RM_Z);
const
cgsize2fpuoppostfix : array[OS_NO..OS_F128] of toppostfix = (
PF_E,
PF_None,PF_None,PF_None,PF_None,PF_None,PF_None,PF_None,PF_None,
PF_S,PF_D,PF_E,PF_None,PF_None);
oppostfix2str : array[TOpPostfix] of string[2] = ('',
's',
'd','e','p','ep',
'b','sb','bt','h','sh','t',
'ia','ib','da','db','fd','fa','ed','ea');
roundingmode2str : array[TRoundingMode] of string[1] = ('',
'p','m','z');
{*****************************************************************************
Conditions
*****************************************************************************}
type
TAsmCond=(C_None,
C_EQ,C_NE,C_CS,C_CC,C_MI,C_PL,C_VS,C_VC,C_HI,C_LS,
C_GE,C_LT,C_GT,C_LE,C_AL,C_NV
);
const
cond2str : array[TAsmCond] of string[2]=('',
'eq','ne','cs','cc','mi','pl','vs','vc','hi','ls',
'ge','lt','gt','le','al','nv'
);
uppercond2str : array[TAsmCond] of string[2]=('',
'EQ','NE','CS','CC','MI','PL','VS','VC','HI','LS',
'GE','LT','GT','LE','AL','NV'
);
inverse_cond : array[TAsmCond] of TAsmCond=(C_None,
C_NE,C_EQ,C_CC,C_CS,C_PL,C_MI,C_VC,C_VS,C_LS,C_HI,
C_LT,C_GE,C_LE,C_GT,C_None,C_None
);
{*****************************************************************************
Flags
*****************************************************************************}
type
TResFlags = (F_EQ,F_NE,F_CS,F_CC,F_MI,F_PL,F_VS,F_VC,F_HI,F_LS,
F_GE,F_LT,F_GT,F_LE);
{*****************************************************************************
Reference
*****************************************************************************}
type
trefoptions=(ref_none,ref_parafixup,ref_localfixup,ref_selffixup);
taddressmode = (AM_OFFSET,AM_PREINDEXED,AM_POSTINDEXED);
tshiftmode = (SM_None,SM_LSL,SM_LSR,SM_ASR,SM_ROR,SM_RRX);
{ reference record }
preference = ^treference;
treference = packed record
base,
index : tregister;
shiftimm : byte;
signindex : shortint;
offset : longint;
symbol : tasmsymbol;
offsetfixup : longint;
options : trefoptions;
addressmode : taddressmode;
shiftmode : tshiftmode;
end;
{ reference record }
pparareference = ^tparareference;
tparareference = packed record
index : tregister;
offset : longint;
end;
{*****************************************************************************
Operands
*****************************************************************************}
tupdatereg = (UR_None,UR_Update);
pshifterop = ^tshifterop;
tshifterop = record
shiftmode : tshiftmode;
rs : tregister;
shiftimm : byte;
end;
{*****************************************************************************
Generic Location
*****************************************************************************}
type
{ tparamlocation describes where a parameter for a procedure is stored.
References are given from the caller's point of view. The usual
TLocation isn't used, because contains a lot of unnessary fields.
}
tparalocation = packed record
size : TCGSize;
loc : TCGLoc;
alignment : byte;
case TCGLoc of
LOC_REFERENCE : (reference : tparareference);
{ segment in reference at the same place as in loc_register }
LOC_MMREGISTER,LOC_CMMREGISTER,
LOC_FPUREGISTER,LOC_CFPUREGISTER,
LOC_REGISTER,LOC_CREGISTER : (
case longint of
1 : (register,registerhigh : tregister);
{ overlay a registerlow }
2 : (registerlow : tregister);
{ overlay a 64 Bit register type }
3 : (reg64 : tregister64);
4 : (register64 : tregister64);
);
end;
tlocation = packed record
loc : TCGLoc;
size : TCGSize;
case TCGLoc of
LOC_FLAGS : (resflags : tresflags);
LOC_CONSTANT : (
case longint of
1 : (value : AWord);
{ can't do this, this layout depends on the host cpu. Use }
{ lo(valueqword)/hi(valueqword) instead (JM) }
{ 2 : (valuelow, valuehigh:AWord); }
{ overlay a complete 64 Bit value }
3 : (valueqword : qword);
);
LOC_CREFERENCE,
LOC_REFERENCE : (reference : treference);
{ segment in reference at the same place as in loc_register }
LOC_REGISTER,LOC_CREGISTER : (
case longint of
1 : (register,registerhigh,segment : tregister);
{ overlay a registerlow }
2 : (registerlow : tregister);
{ overlay a 64 Bit register type }
3 : (reg64 : tregister64);
4 : (register64 : tregister64);
);
{ it's only for better handling }
LOC_MMXREGISTER,LOC_CMMXREGISTER : (mmxreg : tregister);
end;
{*****************************************************************************
Constants
*****************************************************************************}
const
max_operands = 3;
{# Constant defining possibly all registers which might require saving }
ALL_OTHERREGISTERS = [];
general_superregisters = [RS_R0..RS_PC];
{# Table of registers which can be allocated by the code generator
internally, when generating the code.
}
{ legend: }
{ xxxregs = set of all possibly used registers of that type in the code }
{ generator }
{ usableregsxxx = set of all 32bit components of registers that can be }
{ possible allocated to a regvar or using getregisterxxx (this }
{ excludes registers which can be only used for parameter }
{ passing on ABI's that define this) }
{ c_countusableregsxxx = amount of registers in the usableregsxxx set }
maxintregs = 15;
{ to determine how many registers to use for regvars }
maxintscratchregs = 3;
usableregsint = [RS_R4..RS_R10];
c_countusableregsint = 7;
maxfpuregs = 8;
fpuregs = [RS_F0..RS_F7];
usableregsfpu = [RS_F4..RS_F7];
c_countusableregsfpu = 4;
mmregs = [RS_D0..RS_D15];
usableregsmm = [RS_D8..RS_D15];
c_countusableregsmm = 8;
maxaddrregs = 0;
addrregs = [];
usableregsaddr = [];
c_countusableregsaddr = 0;
{*****************************************************************************
Operand Sizes
*****************************************************************************}
type
topsize = (S_NO,
S_B,S_W,S_L,S_BW,S_BL,S_WL,
S_IS,S_IL,S_IQ,
S_FS,S_FL,S_FX,S_D,S_Q,S_FV,S_FXX
);
{*****************************************************************************
Constants
*****************************************************************************}
const
firstsaveintreg = RS_R4;
lastsaveintreg = RS_R10;
firstsavefpureg = RS_F4;
lastsavefpureg = RS_F7;
firstsavemmreg = RS_D8;
lastsavemmreg = RS_D15;
maxvarregs = 7;
varregs : Array [1..maxvarregs] of tsuperregister =
(RS_R4,RS_R5,RS_R6,RS_R7,RS_R8,RS_R9,RS_R10);
maxfpuvarregs = 4;
fpuvarregs : Array [1..maxfpuvarregs] of tsuperregister =
(RS_F4,RS_F5,RS_F6,RS_F7);
{*****************************************************************************
Default generic sizes
*****************************************************************************}
{ Defines the default address size for a processor, }
OS_ADDR = OS_32;
{ the natural int size for a processor, }
OS_INT = OS_32;
{ the maximum float size for a processor, }
OS_FLOAT = OS_F64;
{ the size of a vector register for a processor }
OS_VECTOR = OS_M32;
{*****************************************************************************
Generic Register names
*****************************************************************************}
{ Stack pointer register }
NR_STACK_POINTER_REG = NR_R13;
RS_STACK_POINTER_REG = RS_R13;
{ Frame pointer register }
RS_FRAME_POINTER_REG = RS_R11;
NR_FRAME_POINTER_REG = NR_R11;
{ Register for addressing absolute data in a position independant way,
such as in PIC code. The exact meaning is ABI specific. For
further information look at GCC source : PIC_OFFSET_TABLE_REGNUM
}
NR_PIC_OFFSET_REG = NR_R9;
{ Results are returned in this register (32-bit values) }
NR_FUNCTION_RETURN_REG = NR_R0;
RS_FUNCTION_RETURN_REG = RS_R0;
{ Low part of 64bit return value }
NR_FUNCTION_RETURN64_LOW_REG = NR_R0;
RS_FUNCTION_RETURN64_LOW_REG = RS_R0;
{ High part of 64bit return value }
NR_FUNCTION_RETURN64_HIGH_REG = NR_R1;
RS_FUNCTION_RETURN64_HIGH_REG = RS_R1;
{ The value returned from a function is available in this register }
NR_FUNCTION_RESULT_REG = NR_FUNCTION_RETURN_REG;
RS_FUNCTION_RESULT_REG = RS_FUNCTION_RETURN_REG;
{ The lowh part of 64bit value returned from a function }
NR_FUNCTION_RESULT64_LOW_REG = NR_FUNCTION_RETURN64_LOW_REG;
RS_FUNCTION_RESULT64_LOW_REG = RS_FUNCTION_RETURN64_LOW_REG;
{ The high part of 64bit value returned from a function }
NR_FUNCTION_RESULT64_HIGH_REG = NR_FUNCTION_RETURN64_HIGH_REG;
RS_FUNCTION_RESULT64_HIGH_REG = RS_FUNCTION_RETURN64_HIGH_REG;
NR_FPU_RESULT_REG = NR_F0;
NR_MM_RESULT_REG = NR_NO;
{ Offset where the parent framepointer is pushed }
PARENT_FRAMEPOINTER_OFFSET = 0;
{*****************************************************************************
GCC /ABI linking information
*****************************************************************************}
const
{ Registers which must be saved when calling a routine declared as
cppdecl, cdecl, stdcall, safecall, palmossyscall. The registers
saved should be the ones as defined in the target ABI and / or GCC.
This value can be deduced from the CALLED_USED_REGISTERS array in the
GCC source.
}
std_saved_registers = [RS_R4..RS_R10];
{ Required parameter alignment when calling a routine declared as
stdcall and cdecl. The alignment value should be the one defined
by GCC or the target ABI.
The value of this constant is equal to the constant
PARM_BOUNDARY / BITS_PER_UNIT in the GCC source.
}
std_param_align = 4;
{*****************************************************************************
Helpers
*****************************************************************************}
function cgsize2subreg(s:Tcgsize):Tsubregister;
function is_calljmp(o:tasmop):boolean;
procedure inverse_flags(var f: TResFlags);
function flags_to_cond(const f: TResFlags) : TAsmCond;
function findreg_by_number(r:Tregister):tregisterindex;
function std_regnum_search(const s:string):Tregister;
function std_regname(r:Tregister):string;
procedure shifterop_reset(var so : tshifterop);
function is_pc(const r : tregister) : boolean;
implementation
uses
rgBase,verbose;
const
std_regname_table : array[tregisterindex] of string[7] = (
{$i rarmstd.inc}
);
regnumber_index : array[tregisterindex] of tregisterindex = (
{$i rarmrni.inc}
);
std_regname_index : array[tregisterindex] of tregisterindex = (
{$i rarmsri.inc}
);
function cgsize2subreg(s:Tcgsize):Tsubregister;
begin
cgsize2subreg:=R_SUBWHOLE;
end;
function is_calljmp(o:tasmop):boolean;
begin
{ This isn't 100% perfect because the arm allows jumps also by writing to PC=R15.
To overcome this problem we simply forbid that FPC generates jumps by loading R15 }
is_calljmp:= o in [A_B,A_BL,A_BX,A_BLX];
end;
procedure inverse_flags(var f: TResFlags);
const
inv_flags: array[TResFlags] of TResFlags =
(F_NE,F_NE,F_CC,F_CS,F_PL,F_MI,F_VC,F_VS,F_LS,F_HI,
F_LT,F_GE,F_LE,F_GT);
begin
f:=inv_flags[f];
end;
function flags_to_cond(const f: TResFlags) : TAsmCond;
const
flag_2_cond: array[F_EQ..F_LE] of TAsmCond =
(C_EQ,C_NE,C_CS,C_CC,C_MI,C_PL,C_VS,C_VC,C_HI,C_LS,
C_GE,C_LT,C_GT,C_LE);
begin
if f>high(flag_2_cond) then
internalerror(200112301);
result:=flag_2_cond[f];
end;
function findreg_by_number(r:Tregister):tregisterindex;
begin
result:=rgBase.findreg_by_number_table(r,regnumber_index);
end;
function std_regnum_search(const s:string):Tregister;
begin
result:=regnumber_table[findreg_by_name_table(s,std_regname_table,std_regname_index)];
end;
function std_regname(r:Tregister):string;
var
p : tregisterindex;
begin
p:=findreg_by_number_table(r,regnumber_index);
if p<>0 then
result:=std_regname_table[p]
else
result:=generic_regname(r);
end;
procedure shifterop_reset(var so : tshifterop);
begin
FillChar(so,sizeof(so),0);
end;
function is_pc(const r : tregister) : boolean;
begin
is_pc:=(r=NR_R15);
end;
end.
{
$Log: cpubase.pas,v $
Revision 1.22 2003/12/26 14:02:30 peter
* sparc updates
* use registertype in spill_register
Revision 1.21 2003/12/18 17:06:21 florian
* arm compiler compilation fixed
Revision 1.20 2003/11/29 17:36:56 peter
* fixed is_move
Revision 1.19 2003/11/21 16:29:26 florian
* fixed reading of reg. sets in the arm assembler reader
Revision 1.18 2003/11/17 23:23:47 florian
+ first part of arm assembler reader
Revision 1.17 2003/11/02 14:30:03 florian
* fixed ARM for new reg. allocation scheme
Revision 1.16 2003/10/31 08:40:51 mazen
* rgHelper renamed to rgBase
* using findreg_by_<name|number>_table directly to decrease heap overheading
Revision 1.15 2003/10/30 15:02:04 mazen
* now uses standard routines in rgBase unit to search registers by number and by name
Revision 1.14 2003/09/05 23:57:01 florian
* arm is working again as before the new register naming scheme was implemented
Revision 1.13 2003/09/04 21:07:03 florian
* ARM compiler compiles again
Revision 1.12 2003/09/04 00:15:29 florian
* first bunch of adaptions of arm compiler for new register type
Revision 1.11 2003/09/03 19:10:30 florian
* initial revision of new register naming
Revision 1.10 2003/09/01 15:11:16 florian
* fixed reference handling
* fixed operand postfix for floating point instructions
* fixed wrong shifter constant handling
Revision 1.9 2003/08/29 21:36:28 florian
* fixed procedure entry/exit code
* started to fix reference handling
Revision 1.8 2003/08/28 00:05:29 florian
* today's arm patches
Revision 1.7 2003/08/25 23:20:38 florian
+ started to implement FPU support for the ARM
* fixed a lot of other things
Revision 1.6 2003/08/24 12:27:26 florian
* continued to work on the arm port
Revision 1.5 2003/08/21 03:14:00 florian
* arm compiler can be compiled; far from being working
Revision 1.4 2003/08/20 15:50:13 florian
* more arm stuff
Revision 1.3 2003/08/16 13:23:01 florian
* several arm related stuff fixed
Revision 1.2 2003/07/26 00:55:57 florian
* basic stuff fixed
Revision 1.1 2003/07/21 16:35:30 florian
* very basic stuff for the arm
}
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