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fpc/compiler/cpubase.pas

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{
$Id$
Copyright (c) 1998-2000 by Florian Klaempfl and Peter Vreman
Contains the base types for the i386
* This code was inspired by the NASM sources
The Netwide Assembler is copyright (C) 1996 Simon Tatham and
Julian Hall. All rights reserved.
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 cpubase;
{$ifdef newOptimizations}
{$define foropt}
{$define replacereg}
{$define arithopt}
{$define foldarithops}
{$endif newOptimizations}
interface
{$ifdef TP}
{$L-,Y-}
{$endif}
uses
globals,strings,cobjects,aasm;
const
{ Size of the instruction table converted by nasmconv.pas }
instabentries = 1309;
maxinfolen = 8;
{ By default we want everything }
{$define ATTOP}
{$define ATTREG}
{$define INTELOP}
{$define ITTABLE}
{ For TP we can't use asmdebug due the table sizes }
{$ifndef TP}
{$define ASMDEBUG}
{$endif}
{ We Don't need the intel style opcodes if we don't have a intel
reader or generator }
{$ifndef ASMDEBUG}
{$ifdef NORA386INT}
{$ifdef NOAG386NSM}
{$ifdef NOAG386INT}
{$undef INTELOP}
{$endif}
{$endif}
{$endif}
{$endif}
{ We Don't need the AT&T style opcodes if we don't have a AT&T
reader or generator }
{$ifdef NORA386ATT}
{$ifdef NOAG386ATT}
{$undef ATTOP}
{$ifdef NOAG386DIR}
{$undef ATTREG}
{$endif}
{$endif}
{$endif}
const
{ Operand types }
OT_NONE = $00000000;
OT_BITS8 = $00000001; { size, and other attributes, of the operand }
OT_BITS16 = $00000002;
OT_BITS32 = $00000004;
OT_BITS64 = $00000008; { FPU only }
OT_BITS80 = $00000010;
OT_FAR = $00000020; { this means 16:16 or 16:32, like in CALL/JMP }
OT_NEAR = $00000040;
OT_SHORT = $00000080;
OT_SIZE_MASK = $000000FF; { all the size attributes }
OT_NON_SIZE = not OT_SIZE_MASK;
OT_SIGNED = $00000100; { the operand need to be signed -128-127 }
OT_TO = $00000200; { operand is followed by a colon }
{ reverse effect in FADD, FSUB &c }
OT_COLON = $00000400;
OT_REGISTER = $00001000;
OT_IMMEDIATE = $00002000;
OT_IMM8 = $00002001;
OT_IMM16 = $00002002;
OT_IMM32 = $00002004;
OT_IMM64 = $00002008;
OT_IMM80 = $00002010;
OT_REGMEM = $00200000; { for r/m, ie EA, operands }
OT_REGNORM = $00201000; { 'normal' reg, qualifies as EA }
OT_REG8 = $00201001;
OT_REG16 = $00201002;
OT_REG32 = $00201004;
OT_MMXREG = $00201008; { MMX registers }
OT_XMMREG = $00201010; { Katmai registers }
OT_MEMORY = $00204000; { register number in 'basereg' }
OT_MEM8 = $00204001;
OT_MEM16 = $00204002;
OT_MEM32 = $00204004;
OT_MEM64 = $00204008;
OT_MEM80 = $00204010;
OT_FPUREG = $01000000; { floating point stack registers }
OT_FPU0 = $01000800; { FPU stack register zero }
OT_REG_SMASK = $00070000; { special register operands: these may be treated differently }
{ a mask for the following }
OT_REG_ACCUM = $00211000; { accumulator: AL, AX or EAX }
OT_REG_AL = $00211001; { REG_ACCUM | BITSxx }
OT_REG_AX = $00211002; { ditto }
OT_REG_EAX = $00211004; { and again }
OT_REG_COUNT = $00221000; { counter: CL, CX or ECX }
OT_REG_CL = $00221001; { REG_COUNT | BITSxx }
OT_REG_CX = $00221002; { ditto }
OT_REG_ECX = $00221004; { another one }
OT_REG_DX = $00241002;
OT_REG_SREG = $00081002; { any segment register }
OT_REG_CS = $01081002; { CS }
OT_REG_DESS = $02081002; { DS, ES, SS (non-CS 86 registers) }
OT_REG_FSGS = $04081002; { FS, GS (386 extended registers) }
OT_REG_CDT = $00101004; { CRn, DRn and TRn }
OT_REG_CREG = $08101004; { CRn }
OT_REG_CR4 = $08101404; { CR4 (Pentium only) }
OT_REG_DREG = $10101004; { DRn }
OT_REG_TREG = $20101004; { TRn }
OT_MEM_OFFS = $00604000; { special type of EA }
{ simple [address] offset }
OT_ONENESS = $00800000; { special type of immediate operand }
{ so UNITY == IMMEDIATE | ONENESS }
OT_UNITY = $00802000; { for shift/rotate instructions }
{Instruction flags }
IF_NONE = $00000000;
IF_SM = $00000001; { size match first two operands }
IF_SM2 = $00000002;
IF_SB = $00000004; { unsized operands can't be non-byte }
IF_SW = $00000008; { unsized operands can't be non-word }
IF_SD = $00000010; { unsized operands can't be nondword }
IF_AR0 = $00000020; { SB, SW, SD applies to argument 0 }
IF_AR1 = $00000040; { SB, SW, SD applies to argument 1 }
IF_AR2 = $00000060; { SB, SW, SD applies to argument 2 }
IF_ARMASK = $00000060; { mask for unsized argument spec }
IF_PRIV = $00000100; { it's a privileged instruction }
IF_SMM = $00000200; { it's only valid in SMM }
IF_PROT = $00000400; { it's protected mode only }
IF_UNDOC = $00001000; { it's an undocumented instruction }
IF_FPU = $00002000; { it's an FPU instruction }
IF_MMX = $00004000; { it's an MMX instruction }
IF_3DNOW = $00008000; { it's a 3DNow! instruction }
IF_SSE = $00010000; { it's a SSE (KNI, MMX2) instruction }
IF_PMASK = $FF000000; { the mask for processor types }
IF_PFMASK = $F001FF00; { the mask for disassembly "prefer" }
IF_8086 = $00000000; { 8086 instruction }
IF_186 = $01000000; { 186+ instruction }
IF_286 = $02000000; { 286+ instruction }
IF_386 = $03000000; { 386+ instruction }
IF_486 = $04000000; { 486+ instruction }
IF_PENT = $05000000; { Pentium instruction }
IF_P6 = $06000000; { P6 instruction }
IF_KATMAI = $07000000; { Katmai instructions }
IF_CYRIX = $10000000; { Cyrix-specific instruction }
IF_AMD = $20000000; { AMD-specific instruction }
{ added flags }
IF_PRE = $40000000; { it's a prefix instruction }
IF_PASS2 = $80000000; { if the instruction can change in a second pass }
type
TAttSuffix = (AttSufNONE,AttSufINT,AttSufFPU);
TAsmOp=
{$i i386op.inc}
op2strtable=array[tasmop] of string[10];
const
firstop = low(tasmop);
lastop = high(tasmop);
AsmPrefixes = 6;
AsmPrefix : array[0..AsmPrefixes-1] of TasmOP =(
A_LOCK,A_REP,A_REPE,A_REPNE,A_REPNZ,A_REPZ
);
AsmOverrides = 6;
AsmOverride : array[0..AsmOverrides-1] of TasmOP =(
A_CS,A_ES,A_DS,A_FS,A_GS,A_SS
);
{$ifdef INTELOP}
int_op2str:op2strtable=
{$i i386int.inc}
{$endif INTELOP}
{$ifdef ATTOP}
att_op2str:op2strtable=
{$i i386att.inc}
att_needsuffix:array[tasmop] of TAttSuffix=
{$i i386atts.inc}
{$endif ATTOP}
{*****************************************************************************
Operand Sizes
*****************************************************************************}
type
topsize = (S_NO,
S_B,S_W,S_L,S_BW,S_BL,S_WL,
S_IS,S_IL,S_IQ,
S_FS,S_FL,S_FX,S_D,S_Q,S_FV
);
const
{ Intel style operands ! }
opsize_2_type:array[0..2,topsize] of longint=(
(OT_NONE,
OT_BITS8,OT_BITS16,OT_BITS32,OT_BITS16,OT_BITS32,OT_BITS32,
OT_BITS16,OT_BITS32,OT_BITS64,
OT_BITS32,OT_BITS64,OT_BITS80,OT_BITS64,OT_BITS64,OT_BITS64
),
(OT_NONE,
OT_BITS8,OT_BITS16,OT_BITS32,OT_BITS8,OT_BITS8,OT_BITS16,
OT_BITS16,OT_BITS32,OT_BITS64,
OT_BITS32,OT_BITS64,OT_BITS80,OT_BITS64,OT_BITS64,OT_BITS64
),
(OT_NONE,
OT_BITS8,OT_BITS16,OT_BITS32,OT_NONE,OT_NONE,OT_NONE,
OT_BITS16,OT_BITS32,OT_BITS64,
OT_BITS32,OT_BITS64,OT_BITS80,OT_BITS64,OT_BITS64,OT_BITS64
)
);
{$ifdef ATTOP}
att_opsize2str : array[topsize] of string[2] = ('',
'b','w','l','bw','bl','wl',
's','l','q',
's','l','t','d','q','v'
);
{$endif}
{*****************************************************************************
Conditions
*****************************************************************************}
type
TAsmCond=(C_None,
C_A,C_AE,C_B,C_BE,C_C,C_E,C_G,C_GE,C_L,C_LE,C_NA,C_NAE,
C_NB,C_NBE,C_NC,C_NE,C_NG,C_NGE,C_NL,C_NLE,C_NO,C_NP,
C_NS,C_NZ,C_O,C_P,C_PE,C_PO,C_S,C_Z
);
const
cond2str:array[TAsmCond] of string[3]=('',
'a','ae','b','be','c','e','g','ge','l','le','na','nae',
'nb','nbe','nc','ne','ng','nge','nl','nle','no','np',
'ns','nz','o','p','pe','po','s','z'
);
inverse_cond:array[TAsmCond] of TAsmCond=(C_None,
C_NA,C_NAE,C_NB,C_NBE,C_NC,C_NE,C_NG,C_NGE,C_NL,C_NLE,C_A,C_AE,
C_B,C_BE,C_C,C_E,C_G,C_GE,C_L,C_LE,C_O,C_P,
C_S,C_Z,C_NO,C_NP,C_NP,C_P,C_NS,C_NZ
);
const
CondAsmOps=3;
CondAsmOp:array[0..CondAsmOps-1] of TasmOp=(
A_CMOVcc, A_Jcc, A_SETcc
);
CondAsmOpStr:array[0..CondAsmOps-1] of string[4]=(
'CMOV','J','SET'
);
{*****************************************************************************
Registers
*****************************************************************************}
type
{ enumeration for registers, don't change the order }
{ it's used by the register size conversions }
tregister = (R_NO,
R_EAX,R_ECX,R_EDX,R_EBX,R_ESP,R_EBP,R_ESI,R_EDI,
R_AX,R_CX,R_DX,R_BX,R_SP,R_BP,R_SI,R_DI,
R_AL,R_CL,R_DL,R_BL,R_AH,R_CH,R_BH,R_DH,
R_CS,R_DS,R_ES,R_SS,R_FS,R_GS,
R_ST,R_ST0,R_ST1,R_ST2,R_ST3,R_ST4,R_ST5,R_ST6,R_ST7,
R_DR0,R_DR1,R_DR2,R_DR3,R_DR6,R_DR7,
R_CR0,R_CR2,R_CR3,R_CR4,
R_TR3,R_TR4,R_TR5,R_TR6,R_TR7,
R_MM0,R_MM1,R_MM2,R_MM3,R_MM4,R_MM5,R_MM6,R_MM7,
R_XMM0,R_XMM1,R_XMM2,R_XMM3,R_XMM4,R_XMM5,R_XMM6,R_XMM7
);
tregisterset = set of tregister;
reg2strtable = array[tregister] of string[6];
const
firstreg = low(tregister);
lastreg = high(tregister);
firstsreg = R_CS;
lastsreg = R_GS;
regset8bit : tregisterset = [R_AL..R_DH];
regset16bit : tregisterset = [R_AX..R_DI,R_CS..R_SS];
regset32bit : tregisterset = [R_EAX..R_EDI];
{ Convert reg to opsize }
reg_2_opsize:array[firstreg..lastreg] of topsize = (S_NO,
S_L,S_L,S_L,S_L,S_L,S_L,S_L,S_L,
S_W,S_W,S_W,S_W,S_W,S_W,S_W,S_W,
S_B,S_B,S_B,S_B,S_B,S_B,S_B,S_B,
S_W,S_W,S_W,S_W,S_W,S_W,
S_FL,S_FL,S_FL,S_FL,S_FL,S_FL,S_FL,S_FL,S_FL,
S_L,S_L,S_L,S_L,S_L,S_L,
S_L,S_L,S_L,S_L,
S_L,S_L,S_L,S_L,S_L,
S_D,S_D,S_D,S_D,S_D,S_D,S_D,S_D,
S_D,S_D,S_D,S_D,S_D,S_D,S_D,S_D
);
{ Convert reg to operand type }
reg_2_type:array[firstreg..lastreg] of longint = (OT_NONE,
OT_REG_EAX,OT_REG_ECX,OT_REG32,OT_REG32,OT_REG32,OT_REG32,OT_REG32,OT_REG32,
OT_REG_AX,OT_REG_CX,OT_REG_DX,OT_REG16,OT_REG16,OT_REG16,OT_REG16,OT_REG16,
OT_REG_AL,OT_REG_CL,OT_REG8,OT_REG8,OT_REG8,OT_REG8,OT_REG8,OT_REG8,
OT_REG_CS,OT_REG_DESS,OT_REG_DESS,OT_REG_DESS,OT_REG_FSGS,OT_REG_FSGS,
OT_FPU0,OT_FPU0,OT_FPUREG,OT_FPUREG,OT_FPUREG,OT_FPUREG,OT_FPUREG,OT_FPUREG,OT_FPUREG,
OT_REG_DREG,OT_REG_DREG,OT_REG_DREG,OT_REG_DREG,OT_REG_DREG,OT_REG_DREG,
OT_REG_CREG,OT_REG_CREG,OT_REG_CREG,OT_REG_CR4,
OT_REG_TREG,OT_REG_TREG,OT_REG_TREG,OT_REG_TREG,OT_REG_TREG,
OT_MMXREG,OT_MMXREG,OT_MMXREG,OT_MMXREG,OT_MMXREG,OT_MMXREG,OT_MMXREG,OT_MMXREG,
OT_XMMREG,OT_XMMREG,OT_XMMREG,OT_XMMREG,OT_XMMREG,OT_XMMREG,OT_XMMREG,OT_XMMREG
);
{$ifdef INTELOP}
int_reg2str : reg2strtable = ('',
'eax','ecx','edx','ebx','esp','ebp','esi','edi',
'ax','cx','dx','bx','sp','bp','si','di',
'al','cl','dl','bl','ah','ch','bh','dh',
'cs','ds','es','ss','fs','gs',
'st','st(0)','st(1)','st(2)','st(3)','st(4)','st(5)','st(6)','st(7)',
'dr0','dr1','dr2','dr3','dr6','dr7',
'cr0','cr2','cr3','cr4',
'tr3','tr4','tr5','tr6','tr7',
'mm0','mm1','mm2','mm3','mm4','mm5','mm6','mm7',
'xmm0','xmm1','xmm2','xmm3','xmm4','xmm5','xmm6','xmm7'
);
int_nasmreg2str : reg2strtable = ('',
'eax','ecx','edx','ebx','esp','ebp','esi','edi',
'ax','cx','dx','bx','sp','bp','si','di',
'al','cl','dl','bl','ah','ch','bh','dh',
'cs','ds','es','ss','fs','gs',
'st0','st0','st1','st2','st3','st4','st5','st6','st7',
'dr0','dr1','dr2','dr3','dr6','dr7',
'cr0','cr2','cr3','cr4',
'tr3','tr4','tr5','tr6','tr7',
'mm0','mm1','mm2','mm3','mm4','mm5','mm6','mm7',
'xmm0','xmm1','xmm2','xmm3','xmm4','xmm5','xmm6','xmm7'
);
{$endif}
{$ifdef ATTREG}
att_reg2str : reg2strtable = ('',
'%eax','%ecx','%edx','%ebx','%esp','%ebp','%esi','%edi',
'%ax','%cx','%dx','%bx','%sp','%bp','%si','%di',
'%al','%cl','%dl','%bl','%ah','%ch','%bh','%dh',
'%cs','%ds','%es','%ss','%fs','%gs',
'%st','%st(0)','%st(1)','%st(2)','%st(3)','%st(4)','%st(5)','%st(6)','%st(7)',
'%dr0','%dr1','%dr2','%dr3','%dr6','%dr7',
'%cr0','%cr2','%cr3','%cr4',
'%tr3','%tr4','%tr5','%tr6','%tr7',
'%mm0','%mm1','%mm2','%mm3','%mm4','%mm5','%mm6','%mm7',
'%xmm0','%xmm1','%xmm2','%xmm3','%xmm4','%xmm5','%xmm6','%xmm7'
);
{$endif ATTREG}
{*****************************************************************************
Flags
*****************************************************************************}
type
TResFlags = (F_E,F_NE,F_G,F_L,F_GE,F_LE,F_C,F_NC,F_A,F_AE,F_B,F_BE);
const
{ arrays for boolean location conversions }
flag_2_cond : array[TResFlags] of TAsmCond =
(C_E,C_NE,C_G,C_L,C_GE,C_LE,C_C,C_NC,C_A,C_AE,C_B,C_BE);
{*****************************************************************************
Reference
*****************************************************************************}
type
trefoptions=(ref_none,ref_parafixup,ref_localfixup,ref_selffixup);
{ immediate/reference record }
preference = ^treference;
treference = packed record
is_immediate : boolean; { is this used as reference or immediate }
segment,
base,
index : tregister;
scalefactor : byte;
offset : longint;
symbol : pasmsymbol;
offsetfixup : longint;
options : trefoptions;
{$ifdef newcg}
alignment : byte;
{$endif newcg}
end;
{*****************************************************************************
Operands
*****************************************************************************}
{ Types of operand }
toptype=(top_none,top_reg,top_ref,top_const,top_symbol);
toper=record
ot : longint;
case typ : toptype of
top_none : ();
top_reg : (reg:tregister);
top_ref : (ref:preference);
top_const : (val:longint);
top_symbol : (sym:pasmsymbol;symofs:longint);
end;
{*****************************************************************************
Generic Location
*****************************************************************************}
type
TLoc=(
LOC_INVALID, { added for tracking problems}
LOC_FPU, { FPU stack }
LOC_REGISTER, { in a processor register }
LOC_MEM, { in memory }
LOC_REFERENCE, { like LOC_MEM, but lvalue }
LOC_JUMP, { boolean results only, jump to false or true label }
LOC_FLAGS, { boolean results only, flags are set }
LOC_CREGISTER, { Constant register which shouldn't be modified }
LOC_MMXREGISTER, { MMX register }
LOC_CMMXREGISTER,{ Constant MMX register }
LOC_CFPUREGISTER { if it is a FPU register variable on the fpu stack }
);
plocation = ^tlocation;
tlocation = packed record
case loc : tloc of
LOC_MEM,LOC_REFERENCE : (reference : treference);
LOC_FPU : ();
LOC_JUMP : ();
LOC_FLAGS : (resflags : tresflags);
LOC_INVALID : ();
{ it's only for better handling }
LOC_MMXREGISTER : (mmxreg : tregister);
{ segment in reference at the same place as in loc_register }
LOC_REGISTER,LOC_CREGISTER : (
case longint of
1 : (register,segment,registerhigh : tregister);
{ overlay a registerlow }
2 : (registerlow : tregister);
);
end;
{*****************************************************************************
Constants
*****************************************************************************}
const
general_registers = [R_EAX,R_EBX,R_ECX,R_EDX];
intregs = general_registers;
fpuregs = [];
mmregs = [R_MM0..R_MM7];
registers_saved_on_cdecl = [R_ESI,R_EDI,R_EBX];
{ generic register names }
stack_pointer = R_ESP;
frame_pointer = R_EBP;
self_pointer = R_ESI;
accumulator = R_EAX;
{ the register where the vmt offset is passed to the destructor }
{ helper routine }
vmt_offset_reg = R_EDI;
scratch_regs : array[1..1] of tregister = (R_EDI);
max_scratch_regs = 1;
{ low and high of the available maximum width integer general purpose }
{ registers }
LoGPReg = R_EAX;
HiGPReg = R_EDI;
{ low and high of every possible width general purpose register (same as }
{ above on most architctures apart from the 80x86) }
LoReg = R_EAX;
HiReg = R_BL;
cpuflags = [];
{ sizes }
pointersize = 4;
extended_size = 10;
sizepostfix_pointer = S_L;
{*****************************************************************************
Instruction table
*****************************************************************************}
{$ifndef NOAG386BIN}
type
tinsentry=packed record
opcode : tasmop;
ops : byte;
optypes : array[0..2] of longint;
code : array[0..maxinfolen] of char;
flags : longint;
end;
pinsentry=^tinsentry;
TInsTabCache=array[TasmOp] of longint;
PInsTabCache=^TInsTabCache;
const
InsTab:array[0..instabentries-1] of TInsEntry=
{$i i386tab.inc}
var
InsTabCache : PInsTabCache;
{$endif NOAG386BIN}
{*****************************************************************************
Opcode propeties (needed for optimizer)
*****************************************************************************}
{$ifndef NOOPT}
Type
{What an instruction can change}
TInsChange = (Ch_None,
{Read from a register}
Ch_REAX, Ch_RECX, Ch_REDX, Ch_REBX, Ch_RESP, Ch_REBP, Ch_RESI, Ch_REDI,
{write from a register}
Ch_WEAX, Ch_WECX, Ch_WEDX, Ch_WEBX, Ch_WESP, Ch_WEBP, Ch_WESI, Ch_WEDI,
{read and write from/to a register}
Ch_RWEAX, Ch_RWECX, Ch_RWEDX, Ch_RWEBX, Ch_RWESP, Ch_RWEBP, Ch_RWESI, Ch_RWEDI,
{modify the contents of a register with the purpose of using
this changed content afterwards (add/sub/..., but e.g. not rep
or movsd)}
{$ifdef arithopt}
Ch_MEAX, Ch_MECX, Ch_MEDX, Ch_MEBX, Ch_MESP, Ch_MEBP, Ch_MESI, Ch_MEDI,
{$endif arithopt}
Ch_CDirFlag {clear direction flag}, Ch_SDirFlag {set dir flag},
Ch_RFlags, Ch_WFlags, Ch_RWFlags, Ch_FPU,
Ch_Rop1, Ch_Wop1, Ch_RWop1,
Ch_Rop2, Ch_Wop2, Ch_RWop2,
Ch_Rop3, Ch_WOp3, Ch_RWOp3,
{$ifdef arithopt}
Ch_Mop1, Ch_Mop2, Ch_Mop3,
{$endif arithopt}
Ch_WMemEDI,
Ch_All
);
{$ifndef arithopt}
Const
Ch_MEAX = Ch_RWEAX;
Ch_MECX = Ch_RWECX;
Ch_MEDX = Ch_RWEDX;
Ch_MEBX = Ch_RWEBX;
Ch_MESP = Ch_RWESP;
Ch_MEBP = Ch_RWEBP;
Ch_MESI = Ch_RWESI;
Ch_MEDI = Ch_RWEDI;
Ch_Mop1 = Ch_RWOp1;
Ch_Mop2 = Ch_RWOp2;
Ch_Mop3 = Ch_RWOp3;
{$endif arithopt}
const
MaxCh = 3; { Max things a instruction can change }
type
TInsProp = packed record
Ch : Array[1..MaxCh] of TInsChange;
end;
const
InsProp : array[tasmop] of TInsProp =
{$i i386prop.inc}
{$endif NOOPT}
{*****************************************************************************
Init/Done
*****************************************************************************}
procedure InitCpu;
procedure DoneCpu;
{*****************************************************************************
Helpers
*****************************************************************************}
const
maxvarregs = 4;
varregs : array[1..maxvarregs] of tregister =
(R_EBX,R_EDX,R_ECX,R_EAX);
maxfpuvarregs = 8;
max_operands = 3;
function imm_2_type(l:longint):longint;
{ the following functions allow to convert registers }
{ for example reg8toreg32(R_AL) returns R_EAX }
{ for example reg16toreg32(R_AL) gives an undefined }
{ result }
{ these functions expects that the turn of }
{ tregister isn't changed }
function reg8toreg16(reg : tregister) : tregister;
function reg8toreg32(reg : tregister) : tregister;
function reg16toreg8(reg : tregister) : tregister;
function reg32toreg8(reg : tregister) : tregister;
function reg32toreg16(reg : tregister) : tregister;
function reg16toreg32(reg : tregister) : tregister;
{ these procedures must be defined by all target cpus }
function regtoreg8(reg : tregister) : tregister;
function regtoreg16(reg : tregister) : tregister;
function regtoreg32(reg : tregister) : tregister;
{ can be ignored on 32 bit systems }
function regtoreg64(reg : tregister) : tregister;
{ returns the operand prefix for a given register }
function regsize(reg : tregister) : topsize;
{ resets all values of ref to defaults }
procedure reset_reference(var ref : treference);
{ set mostly used values of a new reference }
function new_reference(base : tregister;offset : longint) : preference;
function newreference(const r : treference) : preference;
procedure disposereference(var r : preference);
function reg2str(r : tregister) : string;
function is_calljmp(o:tasmop):boolean;
implementation
{$ifdef heaptrc}
uses
ppheap;
{$endif heaptrc}
{*****************************************************************************
Helpers
*****************************************************************************}
function imm_2_type(l:longint):longint;
begin
if (l>=-128) and (l<=127) then
imm_2_type:=OT_IMM8 or OT_SIGNED
else
if (l>=-255) and (l<=255) then
imm_2_type:=OT_IMM8
else
if (l>=-32768) and (l<=32767) then
imm_2_type:=OT_IMM16 or OT_SIGNED
else
if (l>=-65536) and (l<=65535) then
imm_2_type:=OT_IMM16 or OT_SIGNED
else
imm_2_type:=OT_IMM32;
end;
function reg2str(r : tregister) : string;
const
a : array[R_NO..R_BL] of string[3] =
('','EAX','ECX','EDX','EBX','ESP','EBP','ESI','EDI',
'AX','CX','DX','BX','SP','BP','SI','DI',
'AL','CL','DL','BL');
begin
if r in [R_ST0..R_ST7] then
reg2str:='ST('+tostr(longint(r)-longint(R_ST0))+')'
else
reg2str:=a[r];
end;
function is_calljmp(o:tasmop):boolean;
begin
case o of
A_CALL,
A_JCXZ,
A_JECXZ,
A_JMP,
A_LOOP,
A_LOOPE,
A_LOOPNE,
A_LOOPNZ,
A_LOOPZ,
A_Jcc :
is_calljmp:=true;
else
is_calljmp:=false;
end;
end;
procedure disposereference(var r : preference);
begin
dispose(r);
r:=nil;
end;
function newreference(const r : treference) : preference;
var
p : preference;
begin
new(p);
p^:=r;
newreference:=p;
end;
function reg8toreg16(reg : tregister) : tregister;
begin
reg8toreg16:=reg32toreg16(reg8toreg32(reg));
end;
function reg16toreg8(reg : tregister) : tregister;
begin
reg16toreg8:=reg32toreg8(reg16toreg32(reg));
end;
function reg16toreg32(reg : tregister) : tregister;
begin
reg16toreg32:=tregister(byte(reg)-byte(R_EDI));
end;
function reg32toreg16(reg : tregister) : tregister;
begin
reg32toreg16:=tregister(byte(reg)+byte(R_EDI));
end;
function reg32toreg8(reg : tregister) : tregister;
begin
reg32toreg8:=tregister(byte(reg)+byte(R_DI));
end;
function reg8toreg32(reg : tregister) : tregister;
begin
reg8toreg32:=tregister(byte(reg)-byte(R_DI));
end;
function regtoreg8(reg : tregister) : tregister;
begin
regtoreg8:=reg32toreg8(reg);
end;
function regtoreg16(reg : tregister) : tregister;
begin
regtoreg16:=reg32toreg16(reg);
end;
function regtoreg32(reg : tregister) : tregister;
begin
regtoreg32:=reg;
end;
function regtoreg64(reg : tregister) : tregister;
begin
{ to avoid warning }
regtoreg64:=R_NO;
end;
function regsize(reg : tregister) : topsize;
begin
if reg in regset8bit then
regsize:=S_B
else if reg in regset16bit then
regsize:=S_W
else if reg in regset32bit then
regsize:=S_L;
end;
procedure reset_reference(var ref : treference);
begin
FillChar(ref,sizeof(treference),0);
end;
function new_reference(base : tregister;offset : longint) : preference;
var
r : preference;
begin
new(r);
FillChar(r^,sizeof(treference),0);
r^.base:=base;
r^.offset:=offset;
new_reference:=r;
end;
{*****************************************************************************
Instruction table
*****************************************************************************}
procedure DoneCpu;
begin
{exitproc:=saveexit; }
{$ifndef NOAG386BIN}
if assigned(instabcache) then
dispose(instabcache);
{$endif NOAG386BIN}
end;
procedure BuildInsTabCache;
{$ifndef NOAG386BIN}
var
i : longint;
{$endif}
begin
{$ifndef NOAG386BIN}
new(instabcache);
FillChar(instabcache^,sizeof(tinstabcache),$ff);
i:=0;
while (i<InsTabEntries) do
begin
if InsTabCache^[InsTab[i].OPcode]=-1 then
InsTabCache^[InsTab[i].OPcode]:=i;
inc(i);
end;
{$endif NOAG386BIN}
end;
procedure InitCpu;
begin
{$ifndef NOAG386BIN}
if not assigned(instabcache) then
BuildInsTabCache;
{$endif NOAG386BIN}
end;
end.
{
$Log$
Revision 1.21 2000-01-28 09:41:39 peter
* fixed fpu suffix parsing for att reader
Revision 1.20 2000/01/07 01:14:23 peter
* updated copyright to 2000
Revision 1.19 1999/12/02 19:28:29 peter
* more A_LOOP<Cond> to is_calljmp
Revision 1.18 1999/12/02 11:26:41 peter
* newoptimizations define added
Revision 1.17 1999/11/09 23:06:45 peter
* esi_offset -> selfpointer_offset to be newcg compatible
* hcogegen -> cgbase fixes for newcg
Revision 1.16 1999/11/06 14:34:20 peter
* truncated log to 20 revs
Revision 1.15 1999/10/27 16:11:28 peter
* insns.dat is used to generate all i386*.inc files
Revision 1.14 1999/10/14 14:57:51 florian
- removed the hcodegen use in the new cg, use cgbase instead
Revision 1.13 1999/09/15 20:35:39 florian
* small fix to operator overloading when in MMX mode
+ the compiler uses now fldz and fld1 if possible
+ some fixes to floating point registers
+ some math. functions (arctan, ln, sin, cos, sqrt, sqr, pi) are now inlined
* .... ???
Revision 1.12 1999/09/10 18:48:01 florian
* some bug fixes (e.g. must_be_valid and procinfo.funcret_is_valid)
* most things for stored properties fixed
Revision 1.11 1999/09/08 16:04:05 peter
* better support for object fields and more error checks for
field accesses which create buggy code
Revision 1.10 1999/08/28 15:34:19 florian
* bug 519 fixed
Revision 1.9 1999/08/19 20:05:09 michael
+ Fixed ifdef NOAG386BIN bug
Revision 1.8 1999/08/19 13:02:10 pierre
+ label faillabel added for _FAIL support
Revision 1.7 1999/08/18 13:26:23 jonas
+ some constants for the new optimizer
Revision 1.6 1999/08/13 15:36:30 peter
* fixed suffix writing for a_setcc
Revision 1.5 1999/08/12 14:36:02 peter
+ KNI instructions
Revision 1.4 1999/08/07 14:20:58 florian
* some small problems fixed
Revision 1.3 1999/08/05 14:58:09 florian
* some fixes for the floating point registers
* more things for the new code generator
Revision 1.2 1999/08/04 13:45:25 florian
+ floating point register variables !!
* pairegalloc is now generated for register variables
Revision 1.1 1999/08/04 00:22:58 florian
* renamed i386asm and i386base to cpuasm and cpubase
Revision 1.10 1999/08/02 21:28:58 florian
* the main branch psub.pas is now used for
newcg compiler
Revision 1.9 1999/08/02 21:01:45 michael
* Moved toperand type back =(
Revision 1.8 1999/08/02 20:45:49 michael
* Moved toperand type to aasm
Revision 1.7 1999/08/02 17:17:09 florian
* small changes for the new code generator
Revision 1.6 1999/06/06 15:53:15 peter
* suffix adding can be turned of for some tasmops in att_nosuffix array
}
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