[thirdparty/binutils-gdb.git] / sim / arm / armemu.h

/*  armemu.h -- ARMulator emulation macros:  ARM6 Instruction Emulator.
    Copyright (C) 1994 Advanced RISC Machines Ltd.
 
    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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */

extern ARMword isize;

/***************************************************************************\
*                           Condition code values                           *
\***************************************************************************/

#define EQ 0
#define NE 1
#define CS 2
#define CC 3
#define MI 4
#define PL 5
#define VS 6
#define VC 7
#define HI 8
#define LS 9
#define GE 10
#define LT 11
#define GT 12
#define LE 13
#define AL 14
#define NV 15

/***************************************************************************\
*                               Shift Opcodes                               *
\***************************************************************************/

#define LSL 0
#define LSR 1
#define ASR 2
#define ROR 3

/***************************************************************************\
*               Macros to twiddle the status flags and mode                 *
\***************************************************************************/

#define NBIT ((unsigned)1L << 31)
#define ZBIT (1L << 30)
#define CBIT (1L << 29)
#define VBIT (1L << 28)
#define IBIT (1L << 7)
#define FBIT (1L << 6)
#define IFBITS (3L << 6)
#define R15IBIT (1L << 27)
#define R15FBIT (1L << 26)
#define R15IFBITS (3L << 26)

#define POS(i) ( (~(i)) >> 31 )
#define NEG(i) ( (i) >> 31 )

#ifdef MODET /* Thumb support */
/* ??? This bit is actually in the low order bit of the PC in the hardware.
   It isn't clear if the simulator needs to model that or not.  */
#define TBIT (1L << 5)
#define TFLAG state->TFlag
#define SETT state->TFlag = 1
#define CLEART state->TFlag = 0
#define ASSIGNT(res) state->TFlag = res
#endif

#define NFLAG state->NFlag
#define SETN state->NFlag = 1
#define CLEARN state->NFlag = 0
#define ASSIGNN(res) state->NFlag = res

#define ZFLAG state->ZFlag
#define SETZ state->ZFlag = 1
#define CLEARZ state->ZFlag = 0
#define ASSIGNZ(res) state->ZFlag = res

#define CFLAG state->CFlag
#define SETC state->CFlag = 1
#define CLEARC state->CFlag = 0
#define ASSIGNC(res) state->CFlag = res

#define VFLAG state->VFlag
#define SETV state->VFlag = 1
#define CLEARV state->VFlag = 0
#define ASSIGNV(res) state->VFlag = res

#define IFLAG (state->IFFlags >> 1)
#define FFLAG (state->IFFlags & 1)
#define IFFLAGS state->IFFlags
#define ASSIGNINT(res) state->IFFlags = (((res) >> 6) & 3)
#define ASSIGNR15INT(res) state->IFFlags = (((res) >> 26) & 3) ;

#define CCBITS (0xf0000000L)
#define INTBITS (0xc0L)

#if defined MODET && defined MODE32
#define PCBITS (0xffffffffL)
#else
#define PCBITS (0xfffffffcL)
#endif

#define MODEBITS (0x1fL)
#define R15INTBITS (3L << 26)

#if defined MODET && defined MODE32
#define R15PCBITS (0x03ffffffL)
#else
#define R15PCBITS (0x03fffffcL)
#endif

#define R15PCMODEBITS (0x03ffffffL)
#define R15MODEBITS (0x3L)

#ifdef MODE32
#define PCMASK PCBITS
#define PCWRAP(pc) (pc)
#else
#define PCMASK R15PCBITS
#define PCWRAP(pc) ((pc) & R15PCBITS)
#endif

#define PC (state->Reg[15] & PCMASK)
#define R15CCINTMODE (state->Reg[15] & (CCBITS | R15INTBITS | R15MODEBITS))
#define R15INT (state->Reg[15] & R15INTBITS)
#define R15INTPC (state->Reg[15] & (R15INTBITS | R15PCBITS))
#define R15INTPCMODE (state->Reg[15] & (R15INTBITS | R15PCBITS | R15MODEBITS))
#define R15INTMODE (state->Reg[15] & (R15INTBITS | R15MODEBITS))
#define R15PC (state->Reg[15] & R15PCBITS)
#define R15PCMODE (state->Reg[15] & (R15PCBITS | R15MODEBITS))
#define R15MODE (state->Reg[15] & R15MODEBITS)

#define ECC ((NFLAG << 31) | (ZFLAG << 30) | (CFLAG << 29) | (VFLAG << 28))
#define EINT (IFFLAGS << 6)
#define ER15INT (IFFLAGS << 26)
#define EMODE (state->Mode)

#ifdef MODET
#define CPSR (ECC | EINT | EMODE | (TFLAG << 5))
#else
#define CPSR (ECC | EINT | EMODE)
#endif

#ifdef MODE32
#define PATCHR15
#else
#define PATCHR15 state->Reg[15] = ECC | ER15INT | EMODE | R15PC
#endif

#define GETSPSR(bank) bank>0?state->Spsr[bank]:ECC | EINT | EMODE ;
#define SETPSR(d,s) d = (s) & (ARMword)(CCBITS | INTBITS | MODEBITS)
#define SETINTMODE(d,s) d = ((d) & CCBITS) | ((s) & (INTBITS | MODEBITS))
#define SETCC(d,s) d = ((d) & (INTBITS | MODEBITS)) | ((s) & CCBITS)
#define SETR15PSR(s) if (state->Mode == USER26MODE) { \
                        state->Reg[15] = ((s) & CCBITS) | R15PC | ER15INT | EMODE ; \
                        ASSIGNN((state->Reg[15] & NBIT) != 0) ; \
                        ASSIGNZ((state->Reg[15] & ZBIT) != 0) ; \
                        ASSIGNC((state->Reg[15] & CBIT) != 0) ; \
                        ASSIGNV((state->Reg[15] & VBIT) != 0) ; \
                        } \
                     else { \
                        state->Reg[15] = R15PC | (s) & (CCBITS | R15INTBITS | R15MODEBITS) ; \
                        ARMul_R15Altered(state) ; \
                        }
#define SETABORT(i,m) state->Cpsr = ECC | EINT | (i) | (m)

#ifndef MODE32
#define VECTORS 0x20
#define LEGALADDR 0x03ffffff
#define VECTORACCESS(address) (address < VECTORS && ARMul_MODE26BIT && state->prog32Sig)
#define ADDREXCEPT(address) (address > LEGALADDR && !state->data32Sig)
#endif

#define INTERNALABORT(address) if (address < VECTORS) \
                                  state->Aborted = ARMul_DataAbortV ; \
                               else \
                                  state->Aborted = ARMul_AddrExceptnV ;

#ifdef MODE32
#define TAKEABORT ARMul_Abort(state,ARMul_DataAbortV)
#else
#define TAKEABORT if (state->Aborted == ARMul_AddrExceptnV) \
                     ARMul_Abort(state,ARMul_AddrExceptnV) ; \
                  else \
                     ARMul_Abort(state,ARMul_DataAbortV)
#endif
#define CPTAKEABORT if (!state->Aborted) \
                       ARMul_Abort(state,ARMul_UndefinedInstrV) ; \
                    else if (state->Aborted == ARMul_AddrExceptnV) \
                       ARMul_Abort(state,ARMul_AddrExceptnV) ; \
                    else \
                       ARMul_Abort(state,ARMul_DataAbortV)


/***************************************************************************\
*               Different ways to start the next instruction                *
\***************************************************************************/

#define SEQ 0
#define NONSEQ 1
#define PCINCEDSEQ 2
#define PCINCEDNONSEQ 3
#define PRIMEPIPE 4
#define RESUME 8

#define NORMALCYCLE state->NextInstr = 0
#define BUSUSEDN state->NextInstr |= 1 /* the next fetch will be an N cycle */
#define BUSUSEDINCPCS state->Reg[15] += isize ; /* a standard PC inc and an S cycle */ \
                      state->NextInstr = (state->NextInstr & 0xff) | 2
#define BUSUSEDINCPCN state->Reg[15] += isize ; /* a standard PC inc and an N cycle */ \
                      state->NextInstr |= 3
#define INCPC state->Reg[15] += isize ; /* a standard PC inc */ \
              state->NextInstr |= 2
#define FLUSHPIPE state->NextInstr |= PRIMEPIPE

/***************************************************************************\
*                          Cycle based emulation                            *
\***************************************************************************/

#define OUTPUTCP(i,a,b)
#define NCYCLE
#define SCYCLE
#define ICYCLE
#define CCYCLE
#define NEXTCYCLE(c)

/***************************************************************************\
*                 States of the cycle based state machine                   *
\***************************************************************************/


/***************************************************************************\
*                 Macros to extract parts of instructions                   *
\***************************************************************************/

#define DESTReg (BITS(12,15))
#define LHSReg (BITS(16,19))
#define RHSReg (BITS(0,3))

#define DEST (state->Reg[DESTReg])

#ifdef MODE32
#ifdef MODET
#define LHS ((LHSReg == 15) ? (state->Reg[15] & 0xFFFFFFFC): (state->Reg[LHSReg]))
#else
#define LHS (state->Reg[LHSReg])
#endif
#else
#define LHS ((LHSReg == 15) ? R15PC : (state->Reg[LHSReg]) )
#endif

#define MULDESTReg (BITS(16,19))
#define MULLHSReg (BITS(0,3))
#define MULRHSReg (BITS(8,11))
#define MULACCReg (BITS(12,15))

#define DPImmRHS (ARMul_ImmedTable[BITS(0,11)])
#define DPSImmRHS temp = BITS(0,11) ; \
                  rhs = ARMul_ImmedTable[temp] ; \
                  if (temp > 255) /* there was a shift */ \
                     ASSIGNC(rhs >> 31) ;

#ifdef MODE32
#define DPRegRHS ((BITS(4,11)==0) ? state->Reg[RHSReg] \
                                  : GetDPRegRHS(state, instr))
#define DPSRegRHS ((BITS(4,11)==0) ? state->Reg[RHSReg] \
                                   : GetDPSRegRHS(state, instr))
#else
#define DPRegRHS ((BITS(0,11)<15) ? state->Reg[RHSReg] \
                                  : GetDPRegRHS(state, instr))
#define DPSRegRHS ((BITS(0,11)<15) ? state->Reg[RHSReg] \
                                   : GetDPSRegRHS(state, instr))
#endif

#define LSBase state->Reg[LHSReg]
#define LSImmRHS (BITS(0,11))

#ifdef MODE32
#define LSRegRHS ((BITS(4,11)==0) ? state->Reg[RHSReg] \
                                  : GetLSRegRHS(state, instr))
#else
#define LSRegRHS ((BITS(0,11)<15) ? state->Reg[RHSReg] \
                                  : GetLSRegRHS(state, instr))
#endif

#define LSMNumRegs ((ARMword)ARMul_BitList[BITS(0,7)] + \
                    (ARMword)ARMul_BitList[BITS(8,15)] )
#define LSMBaseFirst ((LHSReg == 0 && BIT(0)) || \
                      (BIT(LHSReg) && BITS(0,LHSReg-1) == 0))

#define SWAPSRC (state->Reg[RHSReg])

#define LSCOff (BITS(0,7) << 2)
#define CPNum BITS(8,11)

/***************************************************************************\
*                    Macro to rotate n right by b bits                      *
\***************************************************************************/

#define ROTATER(n,b) (((n)>>(b))|((n)<<(32-(b))))

/***************************************************************************\
*                 Macros to store results of instructions                   *
\***************************************************************************/

#define WRITEDEST(d) if (DESTReg==15) \
                        WriteR15(state, d) ; \
                     else \
                          DEST = d

#define WRITESDEST(d) if (DESTReg == 15) \
                         WriteSR15(state, d) ; \
                      else { \
                         DEST = d ; \
                         ARMul_NegZero(state, d) ; \
                         }

#define BYTETOBUS(data) ((data & 0xff) | \
                        ((data & 0xff) << 8) | \
                        ((data & 0xff) << 16) | \
                        ((data & 0xff) << 24))
#define BUSTOBYTE(address,data) \
           if (state->bigendSig) \
              temp = (data >> (((address ^ 3) & 3) << 3)) & 0xff ; \
           else \
              temp = (data >> ((address & 3) << 3)) & 0xff

#define LOADMULT(instr,address,wb) LoadMult(state,instr,address,wb)
#define LOADSMULT(instr,address,wb) LoadSMult(state,instr,address,wb)
#define STOREMULT(instr,address,wb) StoreMult(state,instr,address,wb)
#define STORESMULT(instr,address,wb) StoreSMult(state,instr,address,wb)

#define POSBRANCH ((instr & 0x7fffff) << 2)
#define NEGBRANCH (0xff000000 | ((instr & 0xffffff) << 2))

/***************************************************************************\
*                          Values for Emulate                               *
\***************************************************************************/

#define STOP            0 /* stop */
#define CHANGEMODE      1 /* change mode */
#define ONCE            2 /* execute just one interation */
#define RUN             3 /* continuous execution */

/***************************************************************************\
*                      Stuff that is shared across modes                    *
\***************************************************************************/

extern ARMword ARMul_Emulate26(ARMul_State *state) ;
extern ARMword ARMul_Emulate32(ARMul_State *state) ;
extern unsigned ARMul_MultTable[] ; /* Number of I cycles for a mult */
extern ARMword ARMul_ImmedTable[] ; /* immediate DP LHS values */
extern char ARMul_BitList[] ; /* number of bits in a byte table */
extern void ARMul_Abort26(ARMul_State *state, ARMword) ;
extern void ARMul_Abort32(ARMul_State *state, ARMword) ;
extern unsigned ARMul_NthReg(ARMword instr,unsigned number) ;
extern void ARMul_MSRCpsr(ARMul_State *state, ARMword instr, ARMword rhs) ;
extern void ARMul_NegZero(ARMul_State *state, ARMword result) ;
extern void ARMul_AddCarry(ARMul_State *state, ARMword a, ARMword b, ARMword result) ;
extern void ARMul_AddOverflow(ARMul_State *state, ARMword a, ARMword b, ARMword result) ;
extern void ARMul_SubCarry(ARMul_State *state, ARMword a, ARMword b, ARMword result) ;
extern void ARMul_SubOverflow(ARMul_State *state, ARMword a, ARMword b, ARMword result) ;
extern void ARMul_CPSRAltered(ARMul_State *state) ;
extern void ARMul_R15Altered(ARMul_State *state) ;
extern ARMword ARMul_SwitchMode(ARMul_State *state,ARMword oldmode, ARMword newmode) ;
extern unsigned ARMul_NthReg(ARMword instr, unsigned number) ;
extern void ARMul_LDC(ARMul_State *state,ARMword instr,ARMword address) ;
extern void ARMul_STC(ARMul_State *state,ARMword instr,ARMword address) ;
extern void ARMul_MCR(ARMul_State *state,ARMword instr, ARMword source) ;
extern ARMword ARMul_MRC(ARMul_State *state,ARMword instr) ;
extern void ARMul_CDP(ARMul_State *state,ARMword instr) ;
extern unsigned IntPending(ARMul_State *state) ;
extern ARMword ARMul_Align(ARMul_State *state, ARMword address, ARMword data) ;
#define EVENTLISTSIZE 1024L

/* Thumb support: */

typedef enum {
  t_undefined,  /* undefined Thumb instruction */
  t_decoded,    /* instruction decoded to ARM equivalent */
  t_branch      /* Thumb branch (already processed) */
} tdstate;

extern tdstate ARMul_ThumbDecode(ARMul_State *state,ARMword pc,ARMword tinstr, ARMword *ainstr);

/***************************************************************************\
*                      Macros to scrutinize instructions                    *
\***************************************************************************/


#define UNDEF_Test
#define UNDEF_Shift
#define UNDEF_MSRPC
#define UNDEF_MRSPC
#define UNDEF_MULPCDest
#define UNDEF_MULDestEQOp1
#define UNDEF_LSRBPC
#define UNDEF_LSRBaseEQOffWb
#define UNDEF_LSRBaseEQDestWb
#define UNDEF_LSRPCBaseWb
#define UNDEF_LSRPCOffWb
#define UNDEF_LSMNoRegs
#define UNDEF_LSMPCBase
#define UNDEF_LSMUserBankWb
#define UNDEF_LSMBaseInListWb
#define UNDEF_SWPPC
#define UNDEF_CoProHS
#define UNDEF_MCRPC
#define UNDEF_LSCPCBaseWb
#define UNDEF_UndefNotBounced
#define UNDEF_ShortInt
#define UNDEF_IllegalMode
#define UNDEF_Prog32SigChange
#define UNDEF_Data32SigChange
Commit	Line	Data
c906108c SS	1	/* armemu.h -- ARMulator emulation macros: ARM6 Instruction Emulator.
	2	Copyright (C) 1994 Advanced RISC Machines Ltd.
	3
	4	This program is free software; you can redistribute it and/or modify
	5	it under the terms of the GNU General Public License as published by
	6	the Free Software Foundation; either version 2 of the License, or
	7	(at your option) any later version.
	8
	9	This program is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	GNU General Public License for more details.
	13
	14	You should have received a copy of the GNU General Public License
	15	along with this program; if not, write to the Free Software
	16	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	17
	18	extern ARMword isize;
	19
	20	/***************************************************************************\
	21	* Condition code values *
	22	\***************************************************************************/
	23
	24	#define EQ 0
	25	#define NE 1
	26	#define CS 2
	27	#define CC 3
	28	#define MI 4
	29	#define PL 5
	30	#define VS 6
	31	#define VC 7
	32	#define HI 8
	33	#define LS 9
	34	#define GE 10
	35	#define LT 11
	36	#define GT 12
	37	#define LE 13
	38	#define AL 14
	39	#define NV 15
	40
	41	/***************************************************************************\
	42	* Shift Opcodes *
	43	\***************************************************************************/
	44
	45	#define LSL 0
	46	#define LSR 1
	47	#define ASR 2
	48	#define ROR 3
	49
	50	/***************************************************************************\
	51	* Macros to twiddle the status flags and mode *
	52	\***************************************************************************/
	53
	54	#define NBIT ((unsigned)1L << 31)
	55	#define ZBIT (1L << 30)
	56	#define CBIT (1L << 29)
	57	#define VBIT (1L << 28)
	58	#define IBIT (1L << 7)
	59	#define FBIT (1L << 6)
	60	#define IFBITS (3L << 6)
	61	#define R15IBIT (1L << 27)
	62	#define R15FBIT (1L << 26)
	63	#define R15IFBITS (3L << 26)
	64
65	#define POS(i) ( (~(i)) >> 31 )
66	#define NEG(i) ( (i) >> 31 )
67
68	#ifdef MODET /* Thumb support */
69	/* ??? This bit is actually in the low order bit of the PC in the hardware.
70	It isn't clear if the simulator needs to model that or not. */
71	#define TBIT (1L << 5)
72	#define TFLAG state->TFlag
73	#define SETT state->TFlag = 1
74	#define CLEART state->TFlag = 0
75	#define ASSIGNT(res) state->TFlag = res
76	#endif
77
78	#define NFLAG state->NFlag
79	#define SETN state->NFlag = 1
80	#define CLEARN state->NFlag = 0
81	#define ASSIGNN(res) state->NFlag = res
82
83	#define ZFLAG state->ZFlag
84	#define SETZ state->ZFlag = 1
85	#define CLEARZ state->ZFlag = 0
86	#define ASSIGNZ(res) state->ZFlag = res
87
88	#define CFLAG state->CFlag
89	#define SETC state->CFlag = 1
90	#define CLEARC state->CFlag = 0
91	#define ASSIGNC(res) state->CFlag = res
92
93	#define VFLAG state->VFlag
94	#define SETV state->VFlag = 1
95	#define CLEARV state->VFlag = 0
96	#define ASSIGNV(res) state->VFlag = res
97
98	#define IFLAG (state->IFFlags >> 1)
99	#define FFLAG (state->IFFlags & 1)
100	#define IFFLAGS state->IFFlags
101	#define ASSIGNINT(res) state->IFFlags = (((res) >> 6) & 3)
102	#define ASSIGNR15INT(res) state->IFFlags = (((res) >> 26) & 3) ;
103
104	#define CCBITS (0xf0000000L)
105	#define INTBITS (0xc0L)
106
107	#if defined MODET && defined MODE32
108	#define PCBITS (0xffffffffL)
109	#else
110	#define PCBITS (0xfffffffcL)
111	#endif
112
113	#define MODEBITS (0x1fL)
114	#define R15INTBITS (3L << 26)
115
116	#if defined MODET && defined MODE32
117	#define R15PCBITS (0x03ffffffL)
118	#else
119	#define R15PCBITS (0x03fffffcL)
120	#endif
121
122	#define R15PCMODEBITS (0x03ffffffL)
123	#define R15MODEBITS (0x3L)
124
125	#ifdef MODE32
126	#define PCMASK PCBITS
127	#define PCWRAP(pc) (pc)
128	#else
129	#define PCMASK R15PCBITS
130	#define PCWRAP(pc) ((pc) & R15PCBITS)
131	#endif
132
133	#define PC (state->Reg[15] & PCMASK)
134	#define R15CCINTMODE (state->Reg[15] & (CCBITS \| R15INTBITS \| R15MODEBITS))
135	#define R15INT (state->Reg[15] & R15INTBITS)
136	#define R15INTPC (state->Reg[15] & (R15INTBITS \| R15PCBITS))
137	#define R15INTPCMODE (state->Reg[15] & (R15INTBITS \| R15PCBITS \| R15MODEBITS))
138	#define R15INTMODE (state->Reg[15] & (R15INTBITS \| R15MODEBITS))
139	#define R15PC (state->Reg[15] & R15PCBITS)
140	#define R15PCMODE (state->Reg[15] & (R15PCBITS \| R15MODEBITS))
141	#define R15MODE (state->Reg[15] & R15MODEBITS)
142
143	#define ECC ((NFLAG << 31) \| (ZFLAG << 30) \| (CFLAG << 29) \| (VFLAG << 28))
144	#define EINT (IFFLAGS << 6)
145	#define ER15INT (IFFLAGS << 26)
146	#define EMODE (state->Mode)
147
148	#ifdef MODET
149	#define CPSR (ECC \| EINT \| EMODE \| (TFLAG << 5))
150	#else
151	#define CPSR (ECC \| EINT \| EMODE)
152	#endif
153
154	#ifdef MODE32
155	#define PATCHR15
156	#else
157	#define PATCHR15 state->Reg[15] = ECC \| ER15INT \| EMODE \| R15PC
158	#endif
159
160	#define GETSPSR(bank) bank>0?state->Spsr[bank]:ECC \| EINT \| EMODE ;
161	#define SETPSR(d,s) d = (s) & (ARMword)(CCBITS \| INTBITS \| MODEBITS)
162	#define SETINTMODE(d,s) d = ((d) & CCBITS) \| ((s) & (INTBITS \| MODEBITS))
163	#define SETCC(d,s) d = ((d) & (INTBITS \| MODEBITS)) \| ((s) & CCBITS)
164	#define SETR15PSR(s) if (state->Mode == USER26MODE) { \
165	state->Reg[15] = ((s) & CCBITS) \| R15PC \| ER15INT \| EMODE ; \
166	ASSIGNN((state->Reg[15] & NBIT) != 0) ; \
167	ASSIGNZ((state->Reg[15] & ZBIT) != 0) ; \
168	ASSIGNC((state->Reg[15] & CBIT) != 0) ; \
169	ASSIGNV((state->Reg[15] & VBIT) != 0) ; \
170	} \
171	else { \
172	state->Reg[15] = R15PC \| (s) & (CCBITS \| R15INTBITS \| R15MODEBITS) ; \
173	ARMul_R15Altered(state) ; \
174	}
175	#define SETABORT(i,m) state->Cpsr = ECC \| EINT \| (i) \| (m)
176
177	#ifndef MODE32
178	#define VECTORS 0x20
179	#define LEGALADDR 0x03ffffff
180	#define VECTORACCESS(address) (address < VECTORS && ARMul_MODE26BIT && state->prog32Sig)
181	#define ADDREXCEPT(address) (address > LEGALADDR && !state->data32Sig)
182	#endif
183
184	#define INTERNALABORT(address) if (address < VECTORS) \
185	state->Aborted = ARMul_DataAbortV ; \
186	else \
187	state->Aborted = ARMul_AddrExceptnV ;
188
189	#ifdef MODE32
190	#define TAKEABORT ARMul_Abort(state,ARMul_DataAbortV)
191	#else
192	#define TAKEABORT if (state->Aborted == ARMul_AddrExceptnV) \
193	ARMul_Abort(state,ARMul_AddrExceptnV) ; \
194	else \
195	ARMul_Abort(state,ARMul_DataAbortV)
196	#endif
197	#define CPTAKEABORT if (!state->Aborted) \
198	ARMul_Abort(state,ARMul_UndefinedInstrV) ; \
199	else if (state->Aborted == ARMul_AddrExceptnV) \
200	ARMul_Abort(state,ARMul_AddrExceptnV) ; \
201	else \
202	ARMul_Abort(state,ARMul_DataAbortV)
203
204
205	/***************************************************************************\
206	* Different ways to start the next instruction *
207	\***************************************************************************/
208
209	#define SEQ 0
210	#define NONSEQ 1
211	#define PCINCEDSEQ 2
212	#define PCINCEDNONSEQ 3
213	#define PRIMEPIPE 4
214	#define RESUME 8
215
216	#define NORMALCYCLE state->NextInstr = 0
217	#define BUSUSEDN state->NextInstr \|= 1 /* the next fetch will be an N cycle */
218	#define BUSUSEDINCPCS state->Reg[15] += isize ; /* a standard PC inc and an S cycle */ \
219	state->NextInstr = (state->NextInstr & 0xff) \| 2
220	#define BUSUSEDINCPCN state->Reg[15] += isize ; /* a standard PC inc and an N cycle */ \
221	state->NextInstr \|= 3
222	#define INCPC state->Reg[15] += isize ; /* a standard PC inc */ \
223	state->NextInstr \|= 2
224	#define FLUSHPIPE state->NextInstr \|= PRIMEPIPE
225
226	/***************************************************************************\
227	* Cycle based emulation *
228	\***************************************************************************/
229
230	#define OUTPUTCP(i,a,b)
231	#define NCYCLE
232	#define SCYCLE
233	#define ICYCLE
234	#define CCYCLE
235	#define NEXTCYCLE(c)
236
237	/***************************************************************************\
238	* States of the cycle based state machine *
239	\***************************************************************************/
240
241
242	/***************************************************************************\
243	* Macros to extract parts of instructions *
244	\***************************************************************************/
245
246	#define DESTReg (BITS(12,15))
247	#define LHSReg (BITS(16,19))
248	#define RHSReg (BITS(0,3))
249
250	#define DEST (state->Reg[DESTReg])
251
252	#ifdef MODE32
253	#ifdef MODET
254	#define LHS ((LHSReg == 15) ? (state->Reg[15] & 0xFFFFFFFC): (state->Reg[LHSReg]))
255	#else
256	#define LHS (state->Reg[LHSReg])
257	#endif
258	#else
259	#define LHS ((LHSReg == 15) ? R15PC : (state->Reg[LHSReg]) )
260	#endif
261
262	#define MULDESTReg (BITS(16,19))
263	#define MULLHSReg (BITS(0,3))
264	#define MULRHSReg (BITS(8,11))
265	#define MULACCReg (BITS(12,15))
266
267	#define DPImmRHS (ARMul_ImmedTable[BITS(0,11)])
268	#define DPSImmRHS temp = BITS(0,11) ; \
269	rhs = ARMul_ImmedTable[temp] ; \
270	if (temp > 255) /* there was a shift */ \
271	ASSIGNC(rhs >> 31) ;
272
273	#ifdef MODE32
274	#define DPRegRHS ((BITS(4,11)==0) ? state->Reg[RHSReg] \
275	: GetDPRegRHS(state, instr))
276	#define DPSRegRHS ((BITS(4,11)==0) ? state->Reg[RHSReg] \
277	: GetDPSRegRHS(state, instr))
278	#else
279	#define DPRegRHS ((BITS(0,11)<15) ? state->Reg[RHSReg] \
280	: GetDPRegRHS(state, instr))
281	#define DPSRegRHS ((BITS(0,11)<15) ? state->Reg[RHSReg] \
282	: GetDPSRegRHS(state, instr))
283	#endif
284
285	#define LSBase state->Reg[LHSReg]
286	#define LSImmRHS (BITS(0,11))
287
288	#ifdef MODE32
289	#define LSRegRHS ((BITS(4,11)==0) ? state->Reg[RHSReg] \
290	: GetLSRegRHS(state, instr))
291	#else
292	#define LSRegRHS ((BITS(0,11)<15) ? state->Reg[RHSReg] \
293	: GetLSRegRHS(state, instr))
294	#endif
295
296	#define LSMNumRegs ((ARMword)ARMul_BitList[BITS(0,7)] + \
297	(ARMword)ARMul_BitList[BITS(8,15)] )
298	#define LSMBaseFirst ((LHSReg == 0 && BIT(0)) \|\| \
299	(BIT(LHSReg) && BITS(0,LHSReg-1) == 0))
300
301	#define SWAPSRC (state->Reg[RHSReg])
302
303	#define LSCOff (BITS(0,7) << 2)
304	#define CPNum BITS(8,11)
305
306	/***************************************************************************\
307	* Macro to rotate n right by b bits *
308	\***************************************************************************/
309
310	#define ROTATER(n,b) (((n)>>(b))\|((n)<<(32-(b))))
311
312	/***************************************************************************\
313	* Macros to store results of instructions *
314	\***************************************************************************/
315
316	#define WRITEDEST(d) if (DESTReg==15) \
317	WriteR15(state, d) ; \
318	else \
319	DEST = d
320
321	#define WRITESDEST(d) if (DESTReg == 15) \
322	WriteSR15(state, d) ; \
323	else { \
324	DEST = d ; \
325	ARMul_NegZero(state, d) ; \
326	}
327
328	#define BYTETOBUS(data) ((data & 0xff) \| \
329	((data & 0xff) << 8) \| \
330	((data & 0xff) << 16) \| \
331	((data & 0xff) << 24))
332	#define BUSTOBYTE(address,data) \
333	if (state->bigendSig) \
334	temp = (data >> (((address ^ 3) & 3) << 3)) & 0xff ; \
335	else \
336	temp = (data >> ((address & 3) << 3)) & 0xff
337
338	#define LOADMULT(instr,address,wb) LoadMult(state,instr,address,wb)
339	#define LOADSMULT(instr,address,wb) LoadSMult(state,instr,address,wb)
340	#define STOREMULT(instr,address,wb) StoreMult(state,instr,address,wb)
341	#define STORESMULT(instr,address,wb) StoreSMult(state,instr,address,wb)
342
343	#define POSBRANCH ((instr & 0x7fffff) << 2)
344	#define NEGBRANCH (0xff000000 \| ((instr & 0xffffff) << 2))
345
346	/***************************************************************************\
347	* Values for Emulate *
348	\***************************************************************************/
349
350	#define STOP 0 /* stop */
351	#define CHANGEMODE 1 /* change mode */
352	#define ONCE 2 /* execute just one interation */
353	#define RUN 3 /* continuous execution */
354
355	/***************************************************************************\
356	* Stuff that is shared across modes *
357	\***************************************************************************/
358
359	extern ARMword ARMul_Emulate26(ARMul_State *state) ;
360	extern ARMword ARMul_Emulate32(ARMul_State *state) ;
361	extern unsigned ARMul_MultTable[] ; /* Number of I cycles for a mult */
362	extern ARMword ARMul_ImmedTable[] ; /* immediate DP LHS values */
363	extern char ARMul_BitList[] ; /* number of bits in a byte table */
364	extern void ARMul_Abort26(ARMul_State *state, ARMword) ;
365	extern void ARMul_Abort32(ARMul_State *state, ARMword) ;
366	extern unsigned ARMul_NthReg(ARMword instr,unsigned number) ;
367	extern void ARMul_MSRCpsr(ARMul_State *state, ARMword instr, ARMword rhs) ;
368	extern void ARMul_NegZero(ARMul_State *state, ARMword result) ;
369	extern void ARMul_AddCarry(ARMul_State *state, ARMword a, ARMword b, ARMword result) ;
370	extern void ARMul_AddOverflow(ARMul_State *state, ARMword a, ARMword b, ARMword result) ;
371	extern void ARMul_SubCarry(ARMul_State *state, ARMword a, ARMword b, ARMword result) ;
372	extern void ARMul_SubOverflow(ARMul_State *state, ARMword a, ARMword b, ARMword result) ;
373	extern void ARMul_CPSRAltered(ARMul_State *state) ;
374	extern void ARMul_R15Altered(ARMul_State *state) ;
375	extern ARMword ARMul_SwitchMode(ARMul_State *state,ARMword oldmode, ARMword newmode) ;
376	extern unsigned ARMul_NthReg(ARMword instr, unsigned number) ;
377	extern void ARMul_LDC(ARMul_State *state,ARMword instr,ARMword address) ;
378	extern void ARMul_STC(ARMul_State *state,ARMword instr,ARMword address) ;
379	extern void ARMul_MCR(ARMul_State *state,ARMword instr, ARMword source) ;
380	extern ARMword ARMul_MRC(ARMul_State *state,ARMword instr) ;
381	extern void ARMul_CDP(ARMul_State *state,ARMword instr) ;
382	extern unsigned IntPending(ARMul_State *state) ;
383	extern ARMword ARMul_Align(ARMul_State *state, ARMword address, ARMword data) ;
384	#define EVENTLISTSIZE 1024L
385
386	/* Thumb support: */
387
388	typedef enum {
389	t_undefined, /* undefined Thumb instruction */
390	t_decoded, /* instruction decoded to ARM equivalent */
391	t_branch /* Thumb branch (already processed) */
392	} tdstate;
393
394	extern tdstate ARMul_ThumbDecode(ARMul_State state,ARMword pc,ARMword tinstr, ARMword ainstr);
395
396	/***************************************************************************\
397	* Macros to scrutinize instructions *
398	\***************************************************************************/
399
400
401	#define UNDEF_Test
402	#define UNDEF_Shift
403	#define UNDEF_MSRPC
404	#define UNDEF_MRSPC
405	#define UNDEF_MULPCDest
406	#define UNDEF_MULDestEQOp1
407	#define UNDEF_LSRBPC
408	#define UNDEF_LSRBaseEQOffWb
409	#define UNDEF_LSRBaseEQDestWb
410	#define UNDEF_LSRPCBaseWb
411	#define UNDEF_LSRPCOffWb
412	#define UNDEF_LSMNoRegs
413	#define UNDEF_LSMPCBase
414	#define UNDEF_LSMUserBankWb
415	#define UNDEF_LSMBaseInListWb
416	#define UNDEF_SWPPC
417	#define UNDEF_CoProHS
418	#define UNDEF_MCRPC
419	#define UNDEF_LSCPCBaseWb
420	#define UNDEF_UndefNotBounced
421	#define UNDEF_ShortInt
422	#define UNDEF_IllegalMode
423	#define UNDEF_Prog32SigChange
424	#define UNDEF_Data32SigChange
425