]>
Commit | Line | Data |
---|---|---|
b7bcbe95 FB |
1 | /* |
2 | * ARM helper routines | |
5fafdf24 | 3 | * |
9ee6e8bb | 4 | * Copyright (c) 2005-2007 CodeSourcery, LLC |
b7bcbe95 FB |
5 | * |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
8167ee88 | 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
b7bcbe95 | 18 | */ |
3e457172 BS |
19 | #include "cpu.h" |
20 | #include "dyngen-exec.h" | |
7b59220e | 21 | #include "helper.h" |
b7bcbe95 | 22 | |
ad69471c PB |
23 | #define SIGNBIT (uint32_t)0x80000000 |
24 | #define SIGNBIT64 ((uint64_t)1 << 63) | |
25 | ||
1ce94f81 | 26 | static void raise_exception(CPUARMState *env, int tt) |
b7bcbe95 FB |
27 | { |
28 | env->exception_index = tt; | |
1162c041 | 29 | cpu_loop_exit(env); |
b7bcbe95 FB |
30 | } |
31 | ||
9ef39277 | 32 | uint32_t HELPER(neon_tbl)(CPUARMState *env, uint32_t ireg, uint32_t def, |
8f8e3aa4 | 33 | uint32_t rn, uint32_t maxindex) |
9ee6e8bb PB |
34 | { |
35 | uint32_t val; | |
9ee6e8bb PB |
36 | uint32_t tmp; |
37 | int index; | |
38 | int shift; | |
39 | uint64_t *table; | |
40 | table = (uint64_t *)&env->vfp.regs[rn]; | |
41 | val = 0; | |
9ee6e8bb | 42 | for (shift = 0; shift < 32; shift += 8) { |
8f8e3aa4 PB |
43 | index = (ireg >> shift) & 0xff; |
44 | if (index < maxindex) { | |
3018f259 | 45 | tmp = (table[index >> 3] >> ((index & 7) << 3)) & 0xff; |
9ee6e8bb PB |
46 | val |= tmp << shift; |
47 | } else { | |
8f8e3aa4 | 48 | val |= def & (0xff << shift); |
9ee6e8bb PB |
49 | } |
50 | } | |
8f8e3aa4 | 51 | return val; |
9ee6e8bb PB |
52 | } |
53 | ||
b5ff1b31 FB |
54 | #if !defined(CONFIG_USER_ONLY) |
55 | ||
3e457172 BS |
56 | #include "softmmu_exec.h" |
57 | ||
b5ff1b31 | 58 | #define MMUSUFFIX _mmu |
b5ff1b31 FB |
59 | |
60 | #define SHIFT 0 | |
61 | #include "softmmu_template.h" | |
62 | ||
63 | #define SHIFT 1 | |
64 | #include "softmmu_template.h" | |
65 | ||
66 | #define SHIFT 2 | |
67 | #include "softmmu_template.h" | |
68 | ||
69 | #define SHIFT 3 | |
70 | #include "softmmu_template.h" | |
71 | ||
72 | /* try to fill the TLB and return an exception if error. If retaddr is | |
73 | NULL, it means that the function was called in C code (i.e. not | |
74 | from generated code or from helper.c) */ | |
75 | /* XXX: fix it to restore all registers */ | |
0ecb72a5 | 76 | void tlb_fill(CPUARMState *env1, target_ulong addr, int is_write, int mmu_idx, |
20503968 | 77 | uintptr_t retaddr) |
b5ff1b31 FB |
78 | { |
79 | TranslationBlock *tb; | |
0ecb72a5 | 80 | CPUARMState *saved_env; |
b5ff1b31 FB |
81 | int ret; |
82 | ||
b5ff1b31 | 83 | saved_env = env; |
6e19a137 | 84 | env = env1; |
97b348e7 | 85 | ret = cpu_arm_handle_mmu_fault(env, addr, is_write, mmu_idx); |
551bd27f | 86 | if (unlikely(ret)) { |
b5ff1b31 FB |
87 | if (retaddr) { |
88 | /* now we have a real cpu fault */ | |
20503968 | 89 | tb = tb_find_pc(retaddr); |
b5ff1b31 FB |
90 | if (tb) { |
91 | /* the PC is inside the translated code. It means that we have | |
92 | a virtual CPU fault */ | |
20503968 | 93 | cpu_restore_state(tb, env, retaddr); |
b5ff1b31 FB |
94 | } |
95 | } | |
1ce94f81 | 96 | raise_exception(env, env->exception_index); |
b5ff1b31 FB |
97 | } |
98 | env = saved_env; | |
99 | } | |
b5ff1b31 | 100 | #endif |
1497c961 | 101 | |
b90372ad | 102 | /* FIXME: Pass an explicit pointer to QF to CPUARMState, and move saturating |
ad69471c | 103 | instructions into helper.c */ |
9ef39277 | 104 | uint32_t HELPER(add_setq)(CPUARMState *env, uint32_t a, uint32_t b) |
1497c961 PB |
105 | { |
106 | uint32_t res = a + b; | |
107 | if (((res ^ a) & SIGNBIT) && !((a ^ b) & SIGNBIT)) | |
108 | env->QF = 1; | |
109 | return res; | |
110 | } | |
111 | ||
9ef39277 | 112 | uint32_t HELPER(add_saturate)(CPUARMState *env, uint32_t a, uint32_t b) |
1497c961 PB |
113 | { |
114 | uint32_t res = a + b; | |
115 | if (((res ^ a) & SIGNBIT) && !((a ^ b) & SIGNBIT)) { | |
116 | env->QF = 1; | |
117 | res = ~(((int32_t)a >> 31) ^ SIGNBIT); | |
118 | } | |
119 | return res; | |
120 | } | |
121 | ||
9ef39277 | 122 | uint32_t HELPER(sub_saturate)(CPUARMState *env, uint32_t a, uint32_t b) |
1497c961 PB |
123 | { |
124 | uint32_t res = a - b; | |
125 | if (((res ^ a) & SIGNBIT) && ((a ^ b) & SIGNBIT)) { | |
126 | env->QF = 1; | |
127 | res = ~(((int32_t)a >> 31) ^ SIGNBIT); | |
128 | } | |
129 | return res; | |
130 | } | |
131 | ||
9ef39277 | 132 | uint32_t HELPER(double_saturate)(CPUARMState *env, int32_t val) |
1497c961 PB |
133 | { |
134 | uint32_t res; | |
135 | if (val >= 0x40000000) { | |
136 | res = ~SIGNBIT; | |
137 | env->QF = 1; | |
138 | } else if (val <= (int32_t)0xc0000000) { | |
139 | res = SIGNBIT; | |
140 | env->QF = 1; | |
141 | } else { | |
142 | res = val << 1; | |
143 | } | |
144 | return res; | |
145 | } | |
146 | ||
9ef39277 | 147 | uint32_t HELPER(add_usaturate)(CPUARMState *env, uint32_t a, uint32_t b) |
1497c961 PB |
148 | { |
149 | uint32_t res = a + b; | |
150 | if (res < a) { | |
151 | env->QF = 1; | |
152 | res = ~0; | |
153 | } | |
154 | return res; | |
155 | } | |
156 | ||
9ef39277 | 157 | uint32_t HELPER(sub_usaturate)(CPUARMState *env, uint32_t a, uint32_t b) |
1497c961 PB |
158 | { |
159 | uint32_t res = a - b; | |
160 | if (res > a) { | |
161 | env->QF = 1; | |
162 | res = 0; | |
163 | } | |
164 | return res; | |
165 | } | |
166 | ||
6ddbc6e4 | 167 | /* Signed saturation. */ |
9ef39277 | 168 | static inline uint32_t do_ssat(CPUARMState *env, int32_t val, int shift) |
6ddbc6e4 PB |
169 | { |
170 | int32_t top; | |
171 | uint32_t mask; | |
172 | ||
6ddbc6e4 PB |
173 | top = val >> shift; |
174 | mask = (1u << shift) - 1; | |
175 | if (top > 0) { | |
176 | env->QF = 1; | |
177 | return mask; | |
178 | } else if (top < -1) { | |
179 | env->QF = 1; | |
180 | return ~mask; | |
181 | } | |
182 | return val; | |
183 | } | |
184 | ||
185 | /* Unsigned saturation. */ | |
9ef39277 | 186 | static inline uint32_t do_usat(CPUARMState *env, int32_t val, int shift) |
6ddbc6e4 PB |
187 | { |
188 | uint32_t max; | |
189 | ||
6ddbc6e4 PB |
190 | max = (1u << shift) - 1; |
191 | if (val < 0) { | |
192 | env->QF = 1; | |
193 | return 0; | |
194 | } else if (val > max) { | |
195 | env->QF = 1; | |
196 | return max; | |
197 | } | |
198 | return val; | |
199 | } | |
200 | ||
201 | /* Signed saturate. */ | |
9ef39277 | 202 | uint32_t HELPER(ssat)(CPUARMState *env, uint32_t x, uint32_t shift) |
6ddbc6e4 | 203 | { |
9ef39277 | 204 | return do_ssat(env, x, shift); |
6ddbc6e4 PB |
205 | } |
206 | ||
207 | /* Dual halfword signed saturate. */ | |
9ef39277 | 208 | uint32_t HELPER(ssat16)(CPUARMState *env, uint32_t x, uint32_t shift) |
6ddbc6e4 PB |
209 | { |
210 | uint32_t res; | |
211 | ||
9ef39277 BS |
212 | res = (uint16_t)do_ssat(env, (int16_t)x, shift); |
213 | res |= do_ssat(env, ((int32_t)x) >> 16, shift) << 16; | |
6ddbc6e4 PB |
214 | return res; |
215 | } | |
216 | ||
217 | /* Unsigned saturate. */ | |
9ef39277 | 218 | uint32_t HELPER(usat)(CPUARMState *env, uint32_t x, uint32_t shift) |
6ddbc6e4 | 219 | { |
9ef39277 | 220 | return do_usat(env, x, shift); |
6ddbc6e4 PB |
221 | } |
222 | ||
223 | /* Dual halfword unsigned saturate. */ | |
9ef39277 | 224 | uint32_t HELPER(usat16)(CPUARMState *env, uint32_t x, uint32_t shift) |
6ddbc6e4 PB |
225 | { |
226 | uint32_t res; | |
227 | ||
9ef39277 BS |
228 | res = (uint16_t)do_usat(env, (int16_t)x, shift); |
229 | res |= do_usat(env, ((int32_t)x) >> 16, shift) << 16; | |
6ddbc6e4 PB |
230 | return res; |
231 | } | |
d9ba4830 | 232 | |
1ce94f81 | 233 | void HELPER(wfi)(CPUARMState *env) |
d9ba4830 PB |
234 | { |
235 | env->exception_index = EXCP_HLT; | |
236 | env->halted = 1; | |
1162c041 | 237 | cpu_loop_exit(env); |
d9ba4830 PB |
238 | } |
239 | ||
1ce94f81 | 240 | void HELPER(exception)(CPUARMState *env, uint32_t excp) |
d9ba4830 PB |
241 | { |
242 | env->exception_index = excp; | |
1162c041 | 243 | cpu_loop_exit(env); |
d9ba4830 PB |
244 | } |
245 | ||
9ef39277 | 246 | uint32_t HELPER(cpsr_read)(CPUARMState *env) |
d9ba4830 PB |
247 | { |
248 | return cpsr_read(env) & ~CPSR_EXEC; | |
249 | } | |
250 | ||
1ce94f81 | 251 | void HELPER(cpsr_write)(CPUARMState *env, uint32_t val, uint32_t mask) |
d9ba4830 PB |
252 | { |
253 | cpsr_write(env, val, mask); | |
254 | } | |
b0109805 PB |
255 | |
256 | /* Access to user mode registers from privileged modes. */ | |
9ef39277 | 257 | uint32_t HELPER(get_user_reg)(CPUARMState *env, uint32_t regno) |
b0109805 PB |
258 | { |
259 | uint32_t val; | |
260 | ||
261 | if (regno == 13) { | |
262 | val = env->banked_r13[0]; | |
263 | } else if (regno == 14) { | |
264 | val = env->banked_r14[0]; | |
265 | } else if (regno >= 8 | |
266 | && (env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_FIQ) { | |
267 | val = env->usr_regs[regno - 8]; | |
268 | } else { | |
269 | val = env->regs[regno]; | |
270 | } | |
271 | return val; | |
272 | } | |
273 | ||
1ce94f81 | 274 | void HELPER(set_user_reg)(CPUARMState *env, uint32_t regno, uint32_t val) |
b0109805 PB |
275 | { |
276 | if (regno == 13) { | |
277 | env->banked_r13[0] = val; | |
278 | } else if (regno == 14) { | |
279 | env->banked_r14[0] = val; | |
280 | } else if (regno >= 8 | |
281 | && (env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_FIQ) { | |
282 | env->usr_regs[regno - 8] = val; | |
283 | } else { | |
284 | env->regs[regno] = val; | |
285 | } | |
286 | } | |
4b6a83fb PM |
287 | |
288 | void HELPER(set_cp_reg)(CPUARMState *env, void *rip, uint32_t value) | |
289 | { | |
290 | const ARMCPRegInfo *ri = rip; | |
291 | int excp = ri->writefn(env, ri, value); | |
292 | if (excp) { | |
1ce94f81 | 293 | raise_exception(env, excp); |
4b6a83fb PM |
294 | } |
295 | } | |
296 | ||
297 | uint32_t HELPER(get_cp_reg)(CPUARMState *env, void *rip) | |
298 | { | |
299 | const ARMCPRegInfo *ri = rip; | |
300 | uint64_t value; | |
301 | int excp = ri->readfn(env, ri, &value); | |
302 | if (excp) { | |
1ce94f81 | 303 | raise_exception(env, excp); |
4b6a83fb PM |
304 | } |
305 | return value; | |
306 | } | |
307 | ||
308 | void HELPER(set_cp_reg64)(CPUARMState *env, void *rip, uint64_t value) | |
309 | { | |
310 | const ARMCPRegInfo *ri = rip; | |
311 | int excp = ri->writefn(env, ri, value); | |
312 | if (excp) { | |
1ce94f81 | 313 | raise_exception(env, excp); |
4b6a83fb PM |
314 | } |
315 | } | |
316 | ||
317 | uint64_t HELPER(get_cp_reg64)(CPUARMState *env, void *rip) | |
318 | { | |
319 | const ARMCPRegInfo *ri = rip; | |
320 | uint64_t value; | |
321 | int excp = ri->readfn(env, ri, &value); | |
322 | if (excp) { | |
1ce94f81 | 323 | raise_exception(env, excp); |
4b6a83fb PM |
324 | } |
325 | return value; | |
326 | } | |
b0109805 | 327 | |
8984bd2e PB |
328 | /* ??? Flag setting arithmetic is awkward because we need to do comparisons. |
329 | The only way to do that in TCG is a conditional branch, which clobbers | |
330 | all our temporaries. For now implement these as helper functions. */ | |
331 | ||
9ef39277 | 332 | uint32_t HELPER (add_cc)(CPUARMState *env, uint32_t a, uint32_t b) |
8984bd2e PB |
333 | { |
334 | uint32_t result; | |
37f9ba46 | 335 | result = a + b; |
6fbe23d5 | 336 | env->NF = env->ZF = result; |
8984bd2e PB |
337 | env->CF = result < a; |
338 | env->VF = (a ^ b ^ -1) & (a ^ result); | |
339 | return result; | |
340 | } | |
341 | ||
9ef39277 | 342 | uint32_t HELPER(adc_cc)(CPUARMState *env, uint32_t a, uint32_t b) |
8984bd2e PB |
343 | { |
344 | uint32_t result; | |
345 | if (!env->CF) { | |
346 | result = a + b; | |
347 | env->CF = result < a; | |
348 | } else { | |
349 | result = a + b + 1; | |
350 | env->CF = result <= a; | |
351 | } | |
352 | env->VF = (a ^ b ^ -1) & (a ^ result); | |
6fbe23d5 | 353 | env->NF = env->ZF = result; |
8984bd2e PB |
354 | return result; |
355 | } | |
356 | ||
9ef39277 | 357 | uint32_t HELPER(sub_cc)(CPUARMState *env, uint32_t a, uint32_t b) |
8984bd2e PB |
358 | { |
359 | uint32_t result; | |
360 | result = a - b; | |
6fbe23d5 | 361 | env->NF = env->ZF = result; |
8984bd2e PB |
362 | env->CF = a >= b; |
363 | env->VF = (a ^ b) & (a ^ result); | |
364 | return result; | |
365 | } | |
366 | ||
9ef39277 | 367 | uint32_t HELPER(sbc_cc)(CPUARMState *env, uint32_t a, uint32_t b) |
8984bd2e PB |
368 | { |
369 | uint32_t result; | |
370 | if (!env->CF) { | |
371 | result = a - b - 1; | |
372 | env->CF = a > b; | |
373 | } else { | |
374 | result = a - b; | |
375 | env->CF = a >= b; | |
376 | } | |
377 | env->VF = (a ^ b) & (a ^ result); | |
6fbe23d5 | 378 | env->NF = env->ZF = result; |
8984bd2e PB |
379 | return result; |
380 | } | |
381 | ||
382 | /* Similarly for variable shift instructions. */ | |
383 | ||
9ef39277 | 384 | uint32_t HELPER(shl)(CPUARMState *env, uint32_t x, uint32_t i) |
8984bd2e PB |
385 | { |
386 | int shift = i & 0xff; | |
387 | if (shift >= 32) | |
388 | return 0; | |
389 | return x << shift; | |
390 | } | |
391 | ||
9ef39277 | 392 | uint32_t HELPER(shr)(CPUARMState *env, uint32_t x, uint32_t i) |
8984bd2e PB |
393 | { |
394 | int shift = i & 0xff; | |
395 | if (shift >= 32) | |
396 | return 0; | |
397 | return (uint32_t)x >> shift; | |
398 | } | |
399 | ||
9ef39277 | 400 | uint32_t HELPER(sar)(CPUARMState *env, uint32_t x, uint32_t i) |
8984bd2e PB |
401 | { |
402 | int shift = i & 0xff; | |
403 | if (shift >= 32) | |
404 | shift = 31; | |
405 | return (int32_t)x >> shift; | |
406 | } | |
407 | ||
9ef39277 | 408 | uint32_t HELPER(shl_cc)(CPUARMState *env, uint32_t x, uint32_t i) |
8984bd2e PB |
409 | { |
410 | int shift = i & 0xff; | |
411 | if (shift >= 32) { | |
412 | if (shift == 32) | |
413 | env->CF = x & 1; | |
414 | else | |
415 | env->CF = 0; | |
416 | return 0; | |
417 | } else if (shift != 0) { | |
418 | env->CF = (x >> (32 - shift)) & 1; | |
419 | return x << shift; | |
420 | } | |
421 | return x; | |
422 | } | |
423 | ||
9ef39277 | 424 | uint32_t HELPER(shr_cc)(CPUARMState *env, uint32_t x, uint32_t i) |
8984bd2e PB |
425 | { |
426 | int shift = i & 0xff; | |
427 | if (shift >= 32) { | |
428 | if (shift == 32) | |
429 | env->CF = (x >> 31) & 1; | |
430 | else | |
431 | env->CF = 0; | |
432 | return 0; | |
433 | } else if (shift != 0) { | |
434 | env->CF = (x >> (shift - 1)) & 1; | |
435 | return x >> shift; | |
436 | } | |
437 | return x; | |
438 | } | |
439 | ||
9ef39277 | 440 | uint32_t HELPER(sar_cc)(CPUARMState *env, uint32_t x, uint32_t i) |
8984bd2e PB |
441 | { |
442 | int shift = i & 0xff; | |
443 | if (shift >= 32) { | |
444 | env->CF = (x >> 31) & 1; | |
445 | return (int32_t)x >> 31; | |
446 | } else if (shift != 0) { | |
447 | env->CF = (x >> (shift - 1)) & 1; | |
448 | return (int32_t)x >> shift; | |
449 | } | |
450 | return x; | |
451 | } | |
452 | ||
9ef39277 | 453 | uint32_t HELPER(ror_cc)(CPUARMState *env, uint32_t x, uint32_t i) |
8984bd2e PB |
454 | { |
455 | int shift1, shift; | |
456 | shift1 = i & 0xff; | |
457 | shift = shift1 & 0x1f; | |
458 | if (shift == 0) { | |
459 | if (shift1 != 0) | |
460 | env->CF = (x >> 31) & 1; | |
461 | return x; | |
462 | } else { | |
463 | env->CF = (x >> (shift - 1)) & 1; | |
464 | return ((uint32_t)x >> shift) | (x << (32 - shift)); | |
465 | } | |
466 | } |