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/* cpu.h --- declarations for the RX core.
Copyright (C) 2005-2023 Free Software Foundation, Inc.
Contributed by Red Hat, Inc.
This file is part of the GNU simulators.
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 3 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, see <http://www.gnu.org/licenses/>. */
#include <stdint.h>
#include <setjmp.h>
extern int verbose;
extern int trace;
extern int enable_counting;
typedef uint8_t QI;
typedef uint16_t HI;
typedef uint32_t SI;
typedef uint64_t DI;
extern int rx_in_gdb;
extern int rx_big_endian;
typedef struct
{
SI r[16];
SI r_psw;
SI r_pc;
SI r_usp;
SI r_fpsw;
SI r__reserved_cr_4;
SI r__reserved_cr_5;
SI r__reserved_cr_6;
SI r__reserved_cr_7;
SI r_bpsw;
SI r_bpc;
SI r_isp;
SI r_fintv;
SI r_intb;
SI r__reserved_cr_13;
SI r__reserved_cr_14;
SI r__reserved_cr_15;
SI r__reserved_cr_16;
SI r__reserved_cr_17;
SI r__reserved_cr_18;
SI r__reserved_cr_19;
SI r__reserved_cr_20;
SI r__reserved_cr_21;
SI r__reserved_cr_22;
SI r__reserved_cr_23;
SI r__reserved_cr_24;
SI r__reserved_cr_25;
SI r__reserved_cr_26;
SI r__reserved_cr_27;
SI r__reserved_cr_28;
SI r__reserved_cr_29;
SI r__reserved_cr_30;
SI r__reserved_cr_31;
SI r_temp;
DI r_acc;
#ifdef CYCLE_ACCURATE
/* If set, RTS/RTSD take 2 fewer cycles. */
char fast_return;
SI link_register;
unsigned long long cycle_count;
/* Bits saying what kind of memory operands the previous insn had. */
int m2m;
/* Target register for load. */
int rt;
#endif
} regs_type;
#define M2M_SRC 0x01
#define M2M_DST 0x02
#define M2M_BOTH 0x03
#define sp 0
#define psw 16
#define pc 17
#define usp 18
#define fpsw 19
#define bpsw 24
#define bpc 25
#define isp 26
#define fintv 27
#define intb 28
#define r_temp_idx 48
#define acc64 49
#define acchi 50
#define accmi 51
#define acclo 52
extern regs_type regs;
#define FLAGBIT_C 0x00000001
#define FLAGBIT_Z 0x00000002
#define FLAGBIT_S 0x00000004
#define FLAGBIT_O 0x00000008
#define FLAGBIT_I 0x00010000
#define FLAGBIT_U 0x00020000
#define FLAGBIT_PM 0x00100000
#define FLAGBITS_IPL 0x0f000000
#define FLAGSHIFT_IPL 24
#define FPSWBITS_RM 0x00000003
#define FPSWBITS_CV 0x00000004 /* invalid operation */
#define FPSWBITS_CO 0x00000008 /* overflow */
#define FPSWBITS_CZ 0x00000010 /* divide-by-zero */
#define FPSWBITS_CU 0x00000020 /* underflow */
#define FPSWBITS_CX 0x00000040 /* inexact */
#define FPSWBITS_CE 0x00000080 /* unimplemented processing */
#define FPSWBITS_CMASK 0x000000fc /* all the above */
#define FPSWBITS_DN 0x00000100
#define FPSW_CESH 8
#define FPSWBITS_EV 0x00000400
#define FPSWBITS_EO 0x00000800
#define FPSWBITS_EZ 0x00001000
#define FPSWBITS_EU 0x00002000
#define FPSWBITS_EX 0x00004000
#define FPSW_EFSH 16
#define FPSW_CFSH 24
#define FPSWBITS_FV 0x04000000
#define FPSWBITS_FO 0x08000000
#define FPSWBITS_FZ 0x10000000
#define FPSWBITS_FU 0x20000000
#define FPSWBITS_FX 0x40000000
#define FPSWBITS_FSUM 0x80000000
#define FPSWBITS_FMASK 0x7c000000
#define FPSWBITS_CLEAR 0xffffff03 /* masked at start of any FP opcode */
#define FPRM_NEAREST 0
#define FPRM_ZERO 1
#define FPRM_PINF 2
#define FPRM_NINF 3
extern char *reg_names[];
extern int rx_flagmask;
extern int rx_flagand;
extern int rx_flagor;
extern unsigned int b2mask[];
extern unsigned int b2signbit[];
extern int b2maxsigned[];
extern int b2minsigned[];
void init_regs (void);
void stack_heap_stats (void);
void set_pointer_width (int bytes);
unsigned int get_reg (int id);
unsigned long long get_reg64 (int id);
void put_reg (int id, unsigned int value);
void put_reg64 (int id, unsigned long long value);
void set_flags (int mask, int newbits);
void set_oszc (long long value, int bytes, int c);
void set_szc (long long value, int bytes, int c);
void set_osz (long long value, int bytes);
void set_sz (long long value, int bytes);
void set_zc (int z, int c);
void set_c (int c);
const char *bits (int v, int b);
int condition_true (int cond_id);
#define FLAG(f) ((regs.r_psw & f) ? 1 : 0)
#define FLAG_C FLAG(FLAGBIT_C)
#define FLAG_D FLAG(FLAGBIT_D)
#define FLAG_Z FLAG(FLAGBIT_Z)
#define FLAG_S FLAG(FLAGBIT_S)
#define FLAG_B FLAG(FLAGBIT_B)
#define FLAG_O FLAG(FLAGBIT_O)
#define FLAG_I FLAG(FLAGBIT_I)
#define FLAG_U FLAG(FLAGBIT_U)
#define FLAG_PM FLAG(FLAGBIT_PM)
/* Instruction step return codes.
Suppose one of the decode_* functions below returns a value R:
- If RX_STEPPED (R), then the single-step completed normally.
- If RX_HIT_BREAK (R), then the program hit a breakpoint.
- If RX_EXITED (R), then the program has done an 'exit' system
call, and the exit code is RX_EXIT_STATUS (R).
- If RX_STOPPED (R), then a signal (number RX_STOP_SIG (R)) was
generated.
For building step return codes:
- RX_MAKE_STEPPED is the return code for finishing a normal step.
- RX_MAKE_HIT_BREAK is the return code for hitting a breakpoint.
- RX_MAKE_EXITED (C) is the return code for exiting with status C.
- RX_MAKE_STOPPED (S) is the return code for stopping on signal S. */
#define RX_MAKE_STEPPED() (1)
#define RX_MAKE_HIT_BREAK() (2)
#define RX_MAKE_EXITED(c) (((int) (c) << 8) + 3)
#define RX_MAKE_STOPPED(s) (((int) (s) << 8) + 4)
#define RX_STEPPED(r) ((r) == RX_MAKE_STEPPED ())
#define RX_HIT_BREAK(r) ((r) == RX_MAKE_HIT_BREAK ())
#define RX_EXITED(r) (((r) & 0xff) == 3)
#define RX_EXIT_STATUS(r) ((r) >> 8)
#define RX_STOPPED(r) (((r) & 0xff) == 4)
#define RX_STOP_SIG(r) ((r) >> 8)
/* The step result for the current step. Global to allow
communication between the stepping function and the system
calls. */
extern int step_result;
extern unsigned int rx_cycles;
/* Used to detect heap/stack collisions. */
extern unsigned int heaptop;
extern unsigned int heapbottom;
extern int decode_opcode (void);
extern void reset_decoder (void);
extern void reset_pipeline_stats (void);
extern void halt_pipeline_stats (void);
extern void pipeline_stats (void);
extern void trace_register_changes (void);
extern void generate_access_exception (void);
extern jmp_buf decode_jmp_buf;
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