1 /* cpu.h --- declarations for the RX core.
3 Copyright (C) 2005, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5 Contributed by Red Hat, Inc.
7 This file is part of the GNU simulators.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 extern int enable_counting;
35 extern int rx_big_endian;
82 /* If set, RTS/RTSD take 2 fewer cycles. */
86 unsigned long long cycle_count;
87 /* Bits saying what kind of memory operands the previous insn had. */
89 /* Target register for load. */
110 #define r_temp_idx 48
116 extern regs_type regs;
118 #define FLAGBIT_C 0x00000001
119 #define FLAGBIT_Z 0x00000002
120 #define FLAGBIT_S 0x00000004
121 #define FLAGBIT_O 0x00000008
122 #define FLAGBIT_I 0x00010000
123 #define FLAGBIT_U 0x00020000
124 #define FLAGBIT_PM 0x00100000
125 #define FLAGBITS_IPL 0x0f000000
126 #define FLAGSHIFT_IPL 24
128 #define FPSWBITS_RM 0x00000003
129 #define FPSWBITS_CV 0x00000004 /* invalid operation */
130 #define FPSWBITS_CO 0x00000008 /* overflow */
131 #define FPSWBITS_CZ 0x00000010 /* divide-by-zero */
132 #define FPSWBITS_CU 0x00000020 /* underflow */
133 #define FPSWBITS_CX 0x00000040 /* inexact */
134 #define FPSWBITS_CE 0x00000080 /* unimplemented processing */
135 #define FPSWBITS_CMASK 0x000000fc /* all the above */
136 #define FPSWBITS_DN 0x00000100
138 #define FPSWBITS_EV 0x00000400
139 #define FPSWBITS_EO 0x00000800
140 #define FPSWBITS_EZ 0x00001000
141 #define FPSWBITS_EU 0x00002000
142 #define FPSWBITS_EX 0x00004000
145 #define FPSWBITS_FV 0x04000000
146 #define FPSWBITS_FO 0x08000000
147 #define FPSWBITS_FZ 0x10000000
148 #define FPSWBITS_FU 0x20000000
149 #define FPSWBITS_FX 0x40000000
150 #define FPSWBITS_FSUM 0x80000000
151 #define FPSWBITS_FMASK 0x7c000000
152 #define FPSWBITS_CLEAR 0xffffff03 /* masked at start of any FP opcode */
154 #define FPRM_NEAREST 0
159 extern char *reg_names[];
161 extern int rx_flagmask;
162 extern int rx_flagand;
163 extern int rx_flagor;
165 extern unsigned int b2mask[];
166 extern unsigned int b2signbit[];
167 extern int b2maxsigned[];
168 extern int b2minsigned[];
170 void init_regs (void);
171 void stack_heap_stats (void);
172 void set_pointer_width (int bytes);
173 unsigned int get_reg (int id);
174 unsigned long long get_reg64 (int id);
175 void put_reg (int id, unsigned int value);
176 void put_reg64 (int id, unsigned long long value);
178 void set_flags (int mask, int newbits);
179 void set_oszc (long long value, int bytes, int c);
180 void set_szc (long long value, int bytes, int c);
181 void set_osz (long long value, int bytes);
182 void set_sz (long long value, int bytes);
183 void set_zc (int z, int c);
186 const char *bits (int v, int b);
188 int condition_true (int cond_id);
190 #define FLAG(f) ((regs.r_psw & f) ? 1 : 0)
191 #define FLAG_C FLAG(FLAGBIT_C)
192 #define FLAG_D FLAG(FLAGBIT_D)
193 #define FLAG_Z FLAG(FLAGBIT_Z)
194 #define FLAG_S FLAG(FLAGBIT_S)
195 #define FLAG_B FLAG(FLAGBIT_B)
196 #define FLAG_O FLAG(FLAGBIT_O)
197 #define FLAG_I FLAG(FLAGBIT_I)
198 #define FLAG_U FLAG(FLAGBIT_U)
199 #define FLAG_PM FLAG(FLAGBIT_PM)
201 /* Instruction step return codes.
202 Suppose one of the decode_* functions below returns a value R:
203 - If RX_STEPPED (R), then the single-step completed normally.
204 - If RX_HIT_BREAK (R), then the program hit a breakpoint.
205 - If RX_EXITED (R), then the program has done an 'exit' system
206 call, and the exit code is RX_EXIT_STATUS (R).
207 - If RX_STOPPED (R), then a signal (number RX_STOP_SIG (R)) was
210 For building step return codes:
211 - RX_MAKE_STEPPED is the return code for finishing a normal step.
212 - RX_MAKE_HIT_BREAK is the return code for hitting a breakpoint.
213 - RX_MAKE_EXITED (C) is the return code for exiting with status C.
214 - RX_MAKE_STOPPED (S) is the return code for stopping on signal S. */
215 #define RX_MAKE_STEPPED() (1)
216 #define RX_MAKE_HIT_BREAK() (2)
217 #define RX_MAKE_EXITED(c) (((int) (c) << 8) + 3)
218 #define RX_MAKE_STOPPED(s) (((int) (s) << 8) + 4)
220 #define RX_STEPPED(r) ((r) == RX_MAKE_STEPPED ())
221 #define RX_HIT_BREAK(r) ((r) == RX_MAKE_HIT_BREAK ())
222 #define RX_EXITED(r) (((r) & 0xff) == 3)
223 #define RX_EXIT_STATUS(r) ((r) >> 8)
224 #define RX_STOPPED(r) (((r) & 0xff) == 4)
225 #define RX_STOP_SIG(r) ((r) >> 8)
227 /* The step result for the current step. Global to allow
228 communication between the stepping function and the system
230 extern int step_result;
232 extern unsigned int rx_cycles;
234 /* Used to detect heap/stack collisions. */
235 extern unsigned int heaptop;
236 extern unsigned int heapbottom;
238 extern int decode_opcode (void);
239 extern void reset_decoder (void);
240 extern void reset_pipeline_stats (void);
241 extern void halt_pipeline_stats (void);
242 extern void pipeline_stats (void);
244 extern void trace_register_changes ();
245 extern void generate_access_exception (void);
246 extern jmp_buf decode_jmp_buf;