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61766fe9 RH |
1 | /* |
2 | * HPPA emulation cpu translation for qemu. | |
3 | * | |
4 | * Copyright (c) 2016 Richard Henderson <rth@twiddle.net> | |
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 | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "qemu/osdep.h" | |
21 | #include "cpu.h" | |
22 | #include "disas/disas.h" | |
23 | #include "qemu/host-utils.h" | |
24 | #include "exec/exec-all.h" | |
25 | #include "tcg-op.h" | |
26 | #include "exec/cpu_ldst.h" | |
27 | ||
28 | #include "exec/helper-proto.h" | |
29 | #include "exec/helper-gen.h" | |
30 | ||
31 | #include "trace-tcg.h" | |
32 | #include "exec/log.h" | |
33 | ||
34 | typedef struct DisasCond { | |
35 | TCGCond c; | |
36 | TCGv a0, a1; | |
37 | bool a0_is_n; | |
38 | bool a1_is_0; | |
39 | } DisasCond; | |
40 | ||
41 | typedef struct DisasContext { | |
42 | struct TranslationBlock *tb; | |
43 | CPUState *cs; | |
44 | ||
45 | target_ulong iaoq_f; | |
46 | target_ulong iaoq_b; | |
47 | target_ulong iaoq_n; | |
48 | TCGv iaoq_n_var; | |
49 | ||
50 | int ntemps; | |
51 | TCGv temps[8]; | |
52 | ||
53 | DisasCond null_cond; | |
54 | TCGLabel *null_lab; | |
55 | ||
56 | bool singlestep_enabled; | |
57 | bool psw_n_nonzero; | |
58 | } DisasContext; | |
59 | ||
60 | /* Return values from translate_one, indicating the state of the TB. | |
61 | Note that zero indicates that we are not exiting the TB. */ | |
62 | ||
63 | typedef enum { | |
64 | NO_EXIT, | |
65 | ||
66 | /* We have emitted one or more goto_tb. No fixup required. */ | |
67 | EXIT_GOTO_TB, | |
68 | ||
69 | /* We are not using a goto_tb (for whatever reason), but have updated | |
70 | the iaq (for whatever reason), so don't do it again on exit. */ | |
71 | EXIT_IAQ_N_UPDATED, | |
72 | ||
73 | /* We are exiting the TB, but have neither emitted a goto_tb, nor | |
74 | updated the iaq for the next instruction to be executed. */ | |
75 | EXIT_IAQ_N_STALE, | |
76 | ||
77 | /* We are ending the TB with a noreturn function call, e.g. longjmp. | |
78 | No following code will be executed. */ | |
79 | EXIT_NORETURN, | |
80 | } ExitStatus; | |
81 | ||
82 | typedef struct DisasInsn { | |
83 | uint32_t insn, mask; | |
84 | ExitStatus (*trans)(DisasContext *ctx, uint32_t insn, | |
85 | const struct DisasInsn *f); | |
b2167459 RH |
86 | union { |
87 | void (*f_ttt)(TCGv, TCGv, TCGv); | |
88 | }; | |
61766fe9 RH |
89 | } DisasInsn; |
90 | ||
91 | /* global register indexes */ | |
92 | static TCGv_env cpu_env; | |
93 | static TCGv cpu_gr[32]; | |
94 | static TCGv cpu_iaoq_f; | |
95 | static TCGv cpu_iaoq_b; | |
96 | static TCGv cpu_sar; | |
97 | static TCGv cpu_psw_n; | |
98 | static TCGv cpu_psw_v; | |
99 | static TCGv cpu_psw_cb; | |
100 | static TCGv cpu_psw_cb_msb; | |
101 | static TCGv cpu_cr26; | |
102 | static TCGv cpu_cr27; | |
103 | ||
104 | #include "exec/gen-icount.h" | |
105 | ||
106 | void hppa_translate_init(void) | |
107 | { | |
108 | #define DEF_VAR(V) { &cpu_##V, #V, offsetof(CPUHPPAState, V) } | |
109 | ||
110 | typedef struct { TCGv *var; const char *name; int ofs; } GlobalVar; | |
111 | static const GlobalVar vars[] = { | |
112 | DEF_VAR(sar), | |
113 | DEF_VAR(cr26), | |
114 | DEF_VAR(cr27), | |
115 | DEF_VAR(psw_n), | |
116 | DEF_VAR(psw_v), | |
117 | DEF_VAR(psw_cb), | |
118 | DEF_VAR(psw_cb_msb), | |
119 | DEF_VAR(iaoq_f), | |
120 | DEF_VAR(iaoq_b), | |
121 | }; | |
122 | ||
123 | #undef DEF_VAR | |
124 | ||
125 | /* Use the symbolic register names that match the disassembler. */ | |
126 | static const char gr_names[32][4] = { | |
127 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
128 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
129 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
130 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31" | |
131 | }; | |
132 | ||
133 | static bool done_init = 0; | |
134 | int i; | |
135 | ||
136 | if (done_init) { | |
137 | return; | |
138 | } | |
139 | done_init = 1; | |
140 | ||
141 | cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env"); | |
142 | tcg_ctx.tcg_env = cpu_env; | |
143 | ||
144 | TCGV_UNUSED(cpu_gr[0]); | |
145 | for (i = 1; i < 32; i++) { | |
146 | cpu_gr[i] = tcg_global_mem_new(cpu_env, | |
147 | offsetof(CPUHPPAState, gr[i]), | |
148 | gr_names[i]); | |
149 | } | |
150 | ||
151 | for (i = 0; i < ARRAY_SIZE(vars); ++i) { | |
152 | const GlobalVar *v = &vars[i]; | |
153 | *v->var = tcg_global_mem_new(cpu_env, v->ofs, v->name); | |
154 | } | |
155 | } | |
156 | ||
129e9cc3 RH |
157 | static DisasCond cond_make_f(void) |
158 | { | |
159 | DisasCond r = { .c = TCG_COND_NEVER }; | |
160 | TCGV_UNUSED(r.a0); | |
161 | TCGV_UNUSED(r.a1); | |
162 | return r; | |
163 | } | |
164 | ||
165 | static DisasCond cond_make_n(void) | |
166 | { | |
167 | DisasCond r = { .c = TCG_COND_NE, .a0_is_n = true, .a1_is_0 = true }; | |
168 | r.a0 = cpu_psw_n; | |
169 | TCGV_UNUSED(r.a1); | |
170 | return r; | |
171 | } | |
172 | ||
173 | static DisasCond cond_make_0(TCGCond c, TCGv a0) | |
174 | { | |
175 | DisasCond r = { .c = c, .a1_is_0 = true }; | |
176 | ||
177 | assert (c != TCG_COND_NEVER && c != TCG_COND_ALWAYS); | |
178 | r.a0 = tcg_temp_new(); | |
179 | tcg_gen_mov_tl(r.a0, a0); | |
180 | TCGV_UNUSED(r.a1); | |
181 | ||
182 | return r; | |
183 | } | |
184 | ||
185 | static DisasCond cond_make(TCGCond c, TCGv a0, TCGv a1) | |
186 | { | |
187 | DisasCond r = { .c = c }; | |
188 | ||
189 | assert (c != TCG_COND_NEVER && c != TCG_COND_ALWAYS); | |
190 | r.a0 = tcg_temp_new(); | |
191 | tcg_gen_mov_tl(r.a0, a0); | |
192 | r.a1 = tcg_temp_new(); | |
193 | tcg_gen_mov_tl(r.a1, a1); | |
194 | ||
195 | return r; | |
196 | } | |
197 | ||
198 | static void cond_prep(DisasCond *cond) | |
199 | { | |
200 | if (cond->a1_is_0) { | |
201 | cond->a1_is_0 = false; | |
202 | cond->a1 = tcg_const_tl(0); | |
203 | } | |
204 | } | |
205 | ||
206 | static void cond_free(DisasCond *cond) | |
207 | { | |
208 | switch (cond->c) { | |
209 | default: | |
210 | if (!cond->a0_is_n) { | |
211 | tcg_temp_free(cond->a0); | |
212 | } | |
213 | if (!cond->a1_is_0) { | |
214 | tcg_temp_free(cond->a1); | |
215 | } | |
216 | cond->a0_is_n = false; | |
217 | cond->a1_is_0 = false; | |
218 | TCGV_UNUSED(cond->a0); | |
219 | TCGV_UNUSED(cond->a1); | |
220 | /* fallthru */ | |
221 | case TCG_COND_ALWAYS: | |
222 | cond->c = TCG_COND_NEVER; | |
223 | break; | |
224 | case TCG_COND_NEVER: | |
225 | break; | |
226 | } | |
227 | } | |
228 | ||
61766fe9 RH |
229 | static TCGv get_temp(DisasContext *ctx) |
230 | { | |
231 | unsigned i = ctx->ntemps++; | |
232 | g_assert(i < ARRAY_SIZE(ctx->temps)); | |
233 | return ctx->temps[i] = tcg_temp_new(); | |
234 | } | |
235 | ||
236 | static TCGv load_const(DisasContext *ctx, target_long v) | |
237 | { | |
238 | TCGv t = get_temp(ctx); | |
239 | tcg_gen_movi_tl(t, v); | |
240 | return t; | |
241 | } | |
242 | ||
243 | static TCGv load_gpr(DisasContext *ctx, unsigned reg) | |
244 | { | |
245 | if (reg == 0) { | |
246 | TCGv t = get_temp(ctx); | |
247 | tcg_gen_movi_tl(t, 0); | |
248 | return t; | |
249 | } else { | |
250 | return cpu_gr[reg]; | |
251 | } | |
252 | } | |
253 | ||
254 | static TCGv dest_gpr(DisasContext *ctx, unsigned reg) | |
255 | { | |
129e9cc3 | 256 | if (reg == 0 || ctx->null_cond.c != TCG_COND_NEVER) { |
61766fe9 RH |
257 | return get_temp(ctx); |
258 | } else { | |
259 | return cpu_gr[reg]; | |
260 | } | |
261 | } | |
262 | ||
129e9cc3 RH |
263 | static void save_or_nullify(DisasContext *ctx, TCGv dest, TCGv t) |
264 | { | |
265 | if (ctx->null_cond.c != TCG_COND_NEVER) { | |
266 | cond_prep(&ctx->null_cond); | |
267 | tcg_gen_movcond_tl(ctx->null_cond.c, dest, ctx->null_cond.a0, | |
268 | ctx->null_cond.a1, dest, t); | |
269 | } else { | |
270 | tcg_gen_mov_tl(dest, t); | |
271 | } | |
272 | } | |
273 | ||
274 | static void save_gpr(DisasContext *ctx, unsigned reg, TCGv t) | |
275 | { | |
276 | if (reg != 0) { | |
277 | save_or_nullify(ctx, cpu_gr[reg], t); | |
278 | } | |
279 | } | |
280 | ||
281 | /* Skip over the implementation of an insn that has been nullified. | |
282 | Use this when the insn is too complex for a conditional move. */ | |
283 | static void nullify_over(DisasContext *ctx) | |
284 | { | |
285 | if (ctx->null_cond.c != TCG_COND_NEVER) { | |
286 | /* The always condition should have been handled in the main loop. */ | |
287 | assert(ctx->null_cond.c != TCG_COND_ALWAYS); | |
288 | ||
289 | ctx->null_lab = gen_new_label(); | |
290 | cond_prep(&ctx->null_cond); | |
291 | ||
292 | /* If we're using PSW[N], copy it to a temp because... */ | |
293 | if (ctx->null_cond.a0_is_n) { | |
294 | ctx->null_cond.a0_is_n = false; | |
295 | ctx->null_cond.a0 = tcg_temp_new(); | |
296 | tcg_gen_mov_tl(ctx->null_cond.a0, cpu_psw_n); | |
297 | } | |
298 | /* ... we clear it before branching over the implementation, | |
299 | so that (1) it's clear after nullifying this insn and | |
300 | (2) if this insn nullifies the next, PSW[N] is valid. */ | |
301 | if (ctx->psw_n_nonzero) { | |
302 | ctx->psw_n_nonzero = false; | |
303 | tcg_gen_movi_tl(cpu_psw_n, 0); | |
304 | } | |
305 | ||
306 | tcg_gen_brcond_tl(ctx->null_cond.c, ctx->null_cond.a0, | |
307 | ctx->null_cond.a1, ctx->null_lab); | |
308 | cond_free(&ctx->null_cond); | |
309 | } | |
310 | } | |
311 | ||
312 | /* Save the current nullification state to PSW[N]. */ | |
313 | static void nullify_save(DisasContext *ctx) | |
314 | { | |
315 | if (ctx->null_cond.c == TCG_COND_NEVER) { | |
316 | if (ctx->psw_n_nonzero) { | |
317 | tcg_gen_movi_tl(cpu_psw_n, 0); | |
318 | } | |
319 | return; | |
320 | } | |
321 | if (!ctx->null_cond.a0_is_n) { | |
322 | cond_prep(&ctx->null_cond); | |
323 | tcg_gen_setcond_tl(ctx->null_cond.c, cpu_psw_n, | |
324 | ctx->null_cond.a0, ctx->null_cond.a1); | |
325 | ctx->psw_n_nonzero = true; | |
326 | } | |
327 | cond_free(&ctx->null_cond); | |
328 | } | |
329 | ||
330 | /* Set a PSW[N] to X. The intention is that this is used immediately | |
331 | before a goto_tb/exit_tb, so that there is no fallthru path to other | |
332 | code within the TB. Therefore we do not update psw_n_nonzero. */ | |
333 | static void nullify_set(DisasContext *ctx, bool x) | |
334 | { | |
335 | if (ctx->psw_n_nonzero || x) { | |
336 | tcg_gen_movi_tl(cpu_psw_n, x); | |
337 | } | |
338 | } | |
339 | ||
340 | /* Mark the end of an instruction that may have been nullified. | |
341 | This is the pair to nullify_over. */ | |
342 | static ExitStatus nullify_end(DisasContext *ctx, ExitStatus status) | |
343 | { | |
344 | TCGLabel *null_lab = ctx->null_lab; | |
345 | ||
346 | if (likely(null_lab == NULL)) { | |
347 | /* The current insn wasn't conditional or handled the condition | |
348 | applied to it without a branch, so the (new) setting of | |
349 | NULL_COND can be applied directly to the next insn. */ | |
350 | return status; | |
351 | } | |
352 | ctx->null_lab = NULL; | |
353 | ||
354 | if (likely(ctx->null_cond.c == TCG_COND_NEVER)) { | |
355 | /* The next instruction will be unconditional, | |
356 | and NULL_COND already reflects that. */ | |
357 | gen_set_label(null_lab); | |
358 | } else { | |
359 | /* The insn that we just executed is itself nullifying the next | |
360 | instruction. Store the condition in the PSW[N] global. | |
361 | We asserted PSW[N] = 0 in nullify_over, so that after the | |
362 | label we have the proper value in place. */ | |
363 | nullify_save(ctx); | |
364 | gen_set_label(null_lab); | |
365 | ctx->null_cond = cond_make_n(); | |
366 | } | |
367 | ||
368 | assert(status != EXIT_GOTO_TB && status != EXIT_IAQ_N_UPDATED); | |
369 | if (status == EXIT_NORETURN) { | |
370 | status = NO_EXIT; | |
371 | } | |
372 | return status; | |
373 | } | |
374 | ||
61766fe9 RH |
375 | static void copy_iaoq_entry(TCGv dest, target_ulong ival, TCGv vval) |
376 | { | |
377 | if (unlikely(ival == -1)) { | |
378 | tcg_gen_mov_tl(dest, vval); | |
379 | } else { | |
380 | tcg_gen_movi_tl(dest, ival); | |
381 | } | |
382 | } | |
383 | ||
384 | static inline target_ulong iaoq_dest(DisasContext *ctx, target_long disp) | |
385 | { | |
386 | return ctx->iaoq_f + disp + 8; | |
387 | } | |
388 | ||
389 | static void gen_excp_1(int exception) | |
390 | { | |
391 | TCGv_i32 t = tcg_const_i32(exception); | |
392 | gen_helper_excp(cpu_env, t); | |
393 | tcg_temp_free_i32(t); | |
394 | } | |
395 | ||
396 | static ExitStatus gen_excp(DisasContext *ctx, int exception) | |
397 | { | |
398 | copy_iaoq_entry(cpu_iaoq_f, ctx->iaoq_f, cpu_iaoq_f); | |
399 | copy_iaoq_entry(cpu_iaoq_b, ctx->iaoq_b, cpu_iaoq_b); | |
129e9cc3 | 400 | nullify_save(ctx); |
61766fe9 RH |
401 | gen_excp_1(exception); |
402 | return EXIT_NORETURN; | |
403 | } | |
404 | ||
405 | static ExitStatus gen_illegal(DisasContext *ctx) | |
406 | { | |
129e9cc3 RH |
407 | nullify_over(ctx); |
408 | return nullify_end(ctx, gen_excp(ctx, EXCP_SIGILL)); | |
61766fe9 RH |
409 | } |
410 | ||
411 | static bool use_goto_tb(DisasContext *ctx, target_ulong dest) | |
412 | { | |
413 | /* Suppress goto_tb in the case of single-steping and IO. */ | |
414 | if ((ctx->tb->cflags & CF_LAST_IO) || ctx->singlestep_enabled) { | |
415 | return false; | |
416 | } | |
417 | return true; | |
418 | } | |
419 | ||
129e9cc3 RH |
420 | /* If the next insn is to be nullified, and it's on the same page, |
421 | and we're not attempting to set a breakpoint on it, then we can | |
422 | totally skip the nullified insn. This avoids creating and | |
423 | executing a TB that merely branches to the next TB. */ | |
424 | static bool use_nullify_skip(DisasContext *ctx) | |
425 | { | |
426 | return (((ctx->iaoq_b ^ ctx->iaoq_f) & TARGET_PAGE_MASK) == 0 | |
427 | && !cpu_breakpoint_test(ctx->cs, ctx->iaoq_b, BP_ANY)); | |
428 | } | |
429 | ||
61766fe9 RH |
430 | static void gen_goto_tb(DisasContext *ctx, int which, |
431 | target_ulong f, target_ulong b) | |
432 | { | |
433 | if (f != -1 && b != -1 && use_goto_tb(ctx, f)) { | |
434 | tcg_gen_goto_tb(which); | |
435 | tcg_gen_movi_tl(cpu_iaoq_f, f); | |
436 | tcg_gen_movi_tl(cpu_iaoq_b, b); | |
437 | tcg_gen_exit_tb((uintptr_t)ctx->tb + which); | |
438 | } else { | |
439 | copy_iaoq_entry(cpu_iaoq_f, f, cpu_iaoq_b); | |
440 | copy_iaoq_entry(cpu_iaoq_b, b, ctx->iaoq_n_var); | |
441 | if (ctx->singlestep_enabled) { | |
442 | gen_excp_1(EXCP_DEBUG); | |
443 | } else { | |
444 | tcg_gen_exit_tb(0); | |
445 | } | |
446 | } | |
447 | } | |
448 | ||
b2167459 RH |
449 | /* PA has a habit of taking the LSB of a field and using that as the sign, |
450 | with the rest of the field becoming the least significant bits. */ | |
451 | static target_long low_sextract(uint32_t val, int pos, int len) | |
452 | { | |
453 | target_ulong x = -(target_ulong)extract32(val, pos, 1); | |
454 | x = (x << (len - 1)) | extract32(val, pos + 1, len - 1); | |
455 | return x; | |
456 | } | |
457 | ||
98cd9ca7 RH |
458 | static target_long assemble_12(uint32_t insn) |
459 | { | |
460 | target_ulong x = -(target_ulong)(insn & 1); | |
461 | x = (x << 1) | extract32(insn, 2, 1); | |
462 | x = (x << 10) | extract32(insn, 3, 10); | |
463 | return x; | |
464 | } | |
465 | ||
b2167459 RH |
466 | static target_long assemble_16(uint32_t insn) |
467 | { | |
468 | /* Take the name from PA2.0, which produces a 16-bit number | |
469 | only with wide mode; otherwise a 14-bit number. Since we don't | |
470 | implement wide mode, this is always the 14-bit number. */ | |
471 | return low_sextract(insn, 0, 14); | |
472 | } | |
473 | ||
98cd9ca7 RH |
474 | static target_long assemble_17(uint32_t insn) |
475 | { | |
476 | target_ulong x = -(target_ulong)(insn & 1); | |
477 | x = (x << 5) | extract32(insn, 16, 5); | |
478 | x = (x << 1) | extract32(insn, 2, 1); | |
479 | x = (x << 10) | extract32(insn, 3, 10); | |
480 | return x << 2; | |
481 | } | |
482 | ||
b2167459 RH |
483 | static target_long assemble_21(uint32_t insn) |
484 | { | |
485 | target_ulong x = -(target_ulong)(insn & 1); | |
486 | x = (x << 11) | extract32(insn, 1, 11); | |
487 | x = (x << 2) | extract32(insn, 14, 2); | |
488 | x = (x << 5) | extract32(insn, 16, 5); | |
489 | x = (x << 2) | extract32(insn, 12, 2); | |
490 | return x << 11; | |
491 | } | |
492 | ||
98cd9ca7 RH |
493 | static target_long assemble_22(uint32_t insn) |
494 | { | |
495 | target_ulong x = -(target_ulong)(insn & 1); | |
496 | x = (x << 10) | extract32(insn, 16, 10); | |
497 | x = (x << 1) | extract32(insn, 2, 1); | |
498 | x = (x << 10) | extract32(insn, 3, 10); | |
499 | return x << 2; | |
500 | } | |
501 | ||
b2167459 RH |
502 | /* The parisc documentation describes only the general interpretation of |
503 | the conditions, without describing their exact implementation. The | |
504 | interpretations do not stand up well when considering ADD,C and SUB,B. | |
505 | However, considering the Addition, Subtraction and Logical conditions | |
506 | as a whole it would appear that these relations are similar to what | |
507 | a traditional NZCV set of flags would produce. */ | |
508 | ||
509 | static DisasCond do_cond(unsigned cf, TCGv res, TCGv cb_msb, TCGv sv) | |
510 | { | |
511 | DisasCond cond; | |
512 | TCGv tmp; | |
513 | ||
514 | switch (cf >> 1) { | |
515 | case 0: /* Never / TR */ | |
516 | cond = cond_make_f(); | |
517 | break; | |
518 | case 1: /* = / <> (Z / !Z) */ | |
519 | cond = cond_make_0(TCG_COND_EQ, res); | |
520 | break; | |
521 | case 2: /* < / >= (N / !N) */ | |
522 | cond = cond_make_0(TCG_COND_LT, res); | |
523 | break; | |
524 | case 3: /* <= / > (N | Z / !N & !Z) */ | |
525 | cond = cond_make_0(TCG_COND_LE, res); | |
526 | break; | |
527 | case 4: /* NUV / UV (!C / C) */ | |
528 | cond = cond_make_0(TCG_COND_EQ, cb_msb); | |
529 | break; | |
530 | case 5: /* ZNV / VNZ (!C | Z / C & !Z) */ | |
531 | tmp = tcg_temp_new(); | |
532 | tcg_gen_neg_tl(tmp, cb_msb); | |
533 | tcg_gen_and_tl(tmp, tmp, res); | |
534 | cond = cond_make_0(TCG_COND_EQ, tmp); | |
535 | tcg_temp_free(tmp); | |
536 | break; | |
537 | case 6: /* SV / NSV (V / !V) */ | |
538 | cond = cond_make_0(TCG_COND_LT, sv); | |
539 | break; | |
540 | case 7: /* OD / EV */ | |
541 | tmp = tcg_temp_new(); | |
542 | tcg_gen_andi_tl(tmp, res, 1); | |
543 | cond = cond_make_0(TCG_COND_NE, tmp); | |
544 | tcg_temp_free(tmp); | |
545 | break; | |
546 | default: | |
547 | g_assert_not_reached(); | |
548 | } | |
549 | if (cf & 1) { | |
550 | cond.c = tcg_invert_cond(cond.c); | |
551 | } | |
552 | ||
553 | return cond; | |
554 | } | |
555 | ||
556 | /* Similar, but for the special case of subtraction without borrow, we | |
557 | can use the inputs directly. This can allow other computation to be | |
558 | deleted as unused. */ | |
559 | ||
560 | static DisasCond do_sub_cond(unsigned cf, TCGv res, TCGv in1, TCGv in2, TCGv sv) | |
561 | { | |
562 | DisasCond cond; | |
563 | ||
564 | switch (cf >> 1) { | |
565 | case 1: /* = / <> */ | |
566 | cond = cond_make(TCG_COND_EQ, in1, in2); | |
567 | break; | |
568 | case 2: /* < / >= */ | |
569 | cond = cond_make(TCG_COND_LT, in1, in2); | |
570 | break; | |
571 | case 3: /* <= / > */ | |
572 | cond = cond_make(TCG_COND_LE, in1, in2); | |
573 | break; | |
574 | case 4: /* << / >>= */ | |
575 | cond = cond_make(TCG_COND_LTU, in1, in2); | |
576 | break; | |
577 | case 5: /* <<= / >> */ | |
578 | cond = cond_make(TCG_COND_LEU, in1, in2); | |
579 | break; | |
580 | default: | |
581 | return do_cond(cf, res, sv, sv); | |
582 | } | |
583 | if (cf & 1) { | |
584 | cond.c = tcg_invert_cond(cond.c); | |
585 | } | |
586 | ||
587 | return cond; | |
588 | } | |
589 | ||
590 | /* Similar, but for logicals, where the carry and overflow bits are not | |
591 | computed, and use of them is undefined. */ | |
592 | ||
593 | static DisasCond do_log_cond(unsigned cf, TCGv res) | |
594 | { | |
595 | switch (cf >> 1) { | |
596 | case 4: case 5: case 6: | |
597 | cf &= 1; | |
598 | break; | |
599 | } | |
600 | return do_cond(cf, res, res, res); | |
601 | } | |
602 | ||
98cd9ca7 RH |
603 | /* Similar, but for shift/extract/deposit conditions. */ |
604 | ||
605 | static DisasCond do_sed_cond(unsigned orig, TCGv res) | |
606 | { | |
607 | unsigned c, f; | |
608 | ||
609 | /* Convert the compressed condition codes to standard. | |
610 | 0-2 are the same as logicals (nv,<,<=), while 3 is OD. | |
611 | 4-7 are the reverse of 0-3. */ | |
612 | c = orig & 3; | |
613 | if (c == 3) { | |
614 | c = 7; | |
615 | } | |
616 | f = (orig & 4) / 4; | |
617 | ||
618 | return do_log_cond(c * 2 + f, res); | |
619 | } | |
620 | ||
b2167459 RH |
621 | /* Similar, but for unit conditions. */ |
622 | ||
623 | static DisasCond do_unit_cond(unsigned cf, TCGv res, TCGv in1, TCGv in2) | |
624 | { | |
625 | DisasCond cond; | |
626 | TCGv tmp, cb; | |
627 | ||
628 | TCGV_UNUSED(cb); | |
629 | if (cf & 8) { | |
630 | /* Since we want to test lots of carry-out bits all at once, do not | |
631 | * do our normal thing and compute carry-in of bit B+1 since that | |
632 | * leaves us with carry bits spread across two words. | |
633 | */ | |
634 | cb = tcg_temp_new(); | |
635 | tmp = tcg_temp_new(); | |
636 | tcg_gen_or_tl(cb, in1, in2); | |
637 | tcg_gen_and_tl(tmp, in1, in2); | |
638 | tcg_gen_andc_tl(cb, cb, res); | |
639 | tcg_gen_or_tl(cb, cb, tmp); | |
640 | tcg_temp_free(tmp); | |
641 | } | |
642 | ||
643 | switch (cf >> 1) { | |
644 | case 0: /* never / TR */ | |
645 | case 1: /* undefined */ | |
646 | case 5: /* undefined */ | |
647 | cond = cond_make_f(); | |
648 | break; | |
649 | ||
650 | case 2: /* SBZ / NBZ */ | |
651 | /* See hasless(v,1) from | |
652 | * https://graphics.stanford.edu/~seander/bithacks.html#ZeroInWord | |
653 | */ | |
654 | tmp = tcg_temp_new(); | |
655 | tcg_gen_subi_tl(tmp, res, 0x01010101u); | |
656 | tcg_gen_andc_tl(tmp, tmp, res); | |
657 | tcg_gen_andi_tl(tmp, tmp, 0x80808080u); | |
658 | cond = cond_make_0(TCG_COND_NE, tmp); | |
659 | tcg_temp_free(tmp); | |
660 | break; | |
661 | ||
662 | case 3: /* SHZ / NHZ */ | |
663 | tmp = tcg_temp_new(); | |
664 | tcg_gen_subi_tl(tmp, res, 0x00010001u); | |
665 | tcg_gen_andc_tl(tmp, tmp, res); | |
666 | tcg_gen_andi_tl(tmp, tmp, 0x80008000u); | |
667 | cond = cond_make_0(TCG_COND_NE, tmp); | |
668 | tcg_temp_free(tmp); | |
669 | break; | |
670 | ||
671 | case 4: /* SDC / NDC */ | |
672 | tcg_gen_andi_tl(cb, cb, 0x88888888u); | |
673 | cond = cond_make_0(TCG_COND_NE, cb); | |
674 | break; | |
675 | ||
676 | case 6: /* SBC / NBC */ | |
677 | tcg_gen_andi_tl(cb, cb, 0x80808080u); | |
678 | cond = cond_make_0(TCG_COND_NE, cb); | |
679 | break; | |
680 | ||
681 | case 7: /* SHC / NHC */ | |
682 | tcg_gen_andi_tl(cb, cb, 0x80008000u); | |
683 | cond = cond_make_0(TCG_COND_NE, cb); | |
684 | break; | |
685 | ||
686 | default: | |
687 | g_assert_not_reached(); | |
688 | } | |
689 | if (cf & 8) { | |
690 | tcg_temp_free(cb); | |
691 | } | |
692 | if (cf & 1) { | |
693 | cond.c = tcg_invert_cond(cond.c); | |
694 | } | |
695 | ||
696 | return cond; | |
697 | } | |
698 | ||
699 | /* Compute signed overflow for addition. */ | |
700 | static TCGv do_add_sv(DisasContext *ctx, TCGv res, TCGv in1, TCGv in2) | |
701 | { | |
702 | TCGv sv = get_temp(ctx); | |
703 | TCGv tmp = tcg_temp_new(); | |
704 | ||
705 | tcg_gen_xor_tl(sv, res, in1); | |
706 | tcg_gen_xor_tl(tmp, in1, in2); | |
707 | tcg_gen_andc_tl(sv, sv, tmp); | |
708 | tcg_temp_free(tmp); | |
709 | ||
710 | return sv; | |
711 | } | |
712 | ||
713 | /* Compute signed overflow for subtraction. */ | |
714 | static TCGv do_sub_sv(DisasContext *ctx, TCGv res, TCGv in1, TCGv in2) | |
715 | { | |
716 | TCGv sv = get_temp(ctx); | |
717 | TCGv tmp = tcg_temp_new(); | |
718 | ||
719 | tcg_gen_xor_tl(sv, res, in1); | |
720 | tcg_gen_xor_tl(tmp, in1, in2); | |
721 | tcg_gen_and_tl(sv, sv, tmp); | |
722 | tcg_temp_free(tmp); | |
723 | ||
724 | return sv; | |
725 | } | |
726 | ||
727 | static ExitStatus do_add(DisasContext *ctx, unsigned rt, TCGv in1, TCGv in2, | |
728 | unsigned shift, bool is_l, bool is_tsv, bool is_tc, | |
729 | bool is_c, unsigned cf) | |
730 | { | |
731 | TCGv dest, cb, cb_msb, sv, tmp; | |
732 | unsigned c = cf >> 1; | |
733 | DisasCond cond; | |
734 | ||
735 | dest = tcg_temp_new(); | |
736 | TCGV_UNUSED(cb); | |
737 | TCGV_UNUSED(cb_msb); | |
738 | ||
739 | if (shift) { | |
740 | tmp = get_temp(ctx); | |
741 | tcg_gen_shli_tl(tmp, in1, shift); | |
742 | in1 = tmp; | |
743 | } | |
744 | ||
745 | if (!is_l || c == 4 || c == 5) { | |
746 | TCGv zero = tcg_const_tl(0); | |
747 | cb_msb = get_temp(ctx); | |
748 | tcg_gen_add2_tl(dest, cb_msb, in1, zero, in2, zero); | |
749 | if (is_c) { | |
750 | tcg_gen_add2_tl(dest, cb_msb, dest, cb_msb, cpu_psw_cb_msb, zero); | |
751 | } | |
752 | tcg_temp_free(zero); | |
753 | if (!is_l) { | |
754 | cb = get_temp(ctx); | |
755 | tcg_gen_xor_tl(cb, in1, in2); | |
756 | tcg_gen_xor_tl(cb, cb, dest); | |
757 | } | |
758 | } else { | |
759 | tcg_gen_add_tl(dest, in1, in2); | |
760 | if (is_c) { | |
761 | tcg_gen_add_tl(dest, dest, cpu_psw_cb_msb); | |
762 | } | |
763 | } | |
764 | ||
765 | /* Compute signed overflow if required. */ | |
766 | TCGV_UNUSED(sv); | |
767 | if (is_tsv || c == 6) { | |
768 | sv = do_add_sv(ctx, dest, in1, in2); | |
769 | if (is_tsv) { | |
770 | /* ??? Need to include overflow from shift. */ | |
771 | gen_helper_tsv(cpu_env, sv); | |
772 | } | |
773 | } | |
774 | ||
775 | /* Emit any conditional trap before any writeback. */ | |
776 | cond = do_cond(cf, dest, cb_msb, sv); | |
777 | if (is_tc) { | |
778 | cond_prep(&cond); | |
779 | tmp = tcg_temp_new(); | |
780 | tcg_gen_setcond_tl(cond.c, tmp, cond.a0, cond.a1); | |
781 | gen_helper_tcond(cpu_env, tmp); | |
782 | tcg_temp_free(tmp); | |
783 | } | |
784 | ||
785 | /* Write back the result. */ | |
786 | if (!is_l) { | |
787 | save_or_nullify(ctx, cpu_psw_cb, cb); | |
788 | save_or_nullify(ctx, cpu_psw_cb_msb, cb_msb); | |
789 | } | |
790 | save_gpr(ctx, rt, dest); | |
791 | tcg_temp_free(dest); | |
792 | ||
793 | /* Install the new nullification. */ | |
794 | cond_free(&ctx->null_cond); | |
795 | ctx->null_cond = cond; | |
796 | return NO_EXIT; | |
797 | } | |
798 | ||
799 | static ExitStatus do_sub(DisasContext *ctx, unsigned rt, TCGv in1, TCGv in2, | |
800 | bool is_tsv, bool is_b, bool is_tc, unsigned cf) | |
801 | { | |
802 | TCGv dest, sv, cb, cb_msb, zero, tmp; | |
803 | unsigned c = cf >> 1; | |
804 | DisasCond cond; | |
805 | ||
806 | dest = tcg_temp_new(); | |
807 | cb = tcg_temp_new(); | |
808 | cb_msb = tcg_temp_new(); | |
809 | ||
810 | zero = tcg_const_tl(0); | |
811 | if (is_b) { | |
812 | /* DEST,C = IN1 + ~IN2 + C. */ | |
813 | tcg_gen_not_tl(cb, in2); | |
814 | tcg_gen_add2_tl(dest, cb_msb, in1, zero, cpu_psw_cb_msb, zero); | |
815 | tcg_gen_add2_tl(dest, cb_msb, dest, cb_msb, cb, zero); | |
816 | tcg_gen_xor_tl(cb, cb, in1); | |
817 | tcg_gen_xor_tl(cb, cb, dest); | |
818 | } else { | |
819 | /* DEST,C = IN1 + ~IN2 + 1. We can produce the same result in fewer | |
820 | operations by seeding the high word with 1 and subtracting. */ | |
821 | tcg_gen_movi_tl(cb_msb, 1); | |
822 | tcg_gen_sub2_tl(dest, cb_msb, in1, cb_msb, in2, zero); | |
823 | tcg_gen_eqv_tl(cb, in1, in2); | |
824 | tcg_gen_xor_tl(cb, cb, dest); | |
825 | } | |
826 | tcg_temp_free(zero); | |
827 | ||
828 | /* Compute signed overflow if required. */ | |
829 | TCGV_UNUSED(sv); | |
830 | if (is_tsv || c == 6) { | |
831 | sv = do_sub_sv(ctx, dest, in1, in2); | |
832 | if (is_tsv) { | |
833 | gen_helper_tsv(cpu_env, sv); | |
834 | } | |
835 | } | |
836 | ||
837 | /* Compute the condition. We cannot use the special case for borrow. */ | |
838 | if (!is_b) { | |
839 | cond = do_sub_cond(cf, dest, in1, in2, sv); | |
840 | } else { | |
841 | cond = do_cond(cf, dest, cb_msb, sv); | |
842 | } | |
843 | ||
844 | /* Emit any conditional trap before any writeback. */ | |
845 | if (is_tc) { | |
846 | cond_prep(&cond); | |
847 | tmp = tcg_temp_new(); | |
848 | tcg_gen_setcond_tl(cond.c, tmp, cond.a0, cond.a1); | |
849 | gen_helper_tcond(cpu_env, tmp); | |
850 | tcg_temp_free(tmp); | |
851 | } | |
852 | ||
853 | /* Write back the result. */ | |
854 | save_or_nullify(ctx, cpu_psw_cb, cb); | |
855 | save_or_nullify(ctx, cpu_psw_cb_msb, cb_msb); | |
856 | save_gpr(ctx, rt, dest); | |
857 | tcg_temp_free(dest); | |
858 | ||
859 | /* Install the new nullification. */ | |
860 | cond_free(&ctx->null_cond); | |
861 | ctx->null_cond = cond; | |
862 | return NO_EXIT; | |
863 | } | |
864 | ||
865 | static ExitStatus do_cmpclr(DisasContext *ctx, unsigned rt, TCGv in1, | |
866 | TCGv in2, unsigned cf) | |
867 | { | |
868 | TCGv dest, sv; | |
869 | DisasCond cond; | |
870 | ||
871 | dest = tcg_temp_new(); | |
872 | tcg_gen_sub_tl(dest, in1, in2); | |
873 | ||
874 | /* Compute signed overflow if required. */ | |
875 | TCGV_UNUSED(sv); | |
876 | if ((cf >> 1) == 6) { | |
877 | sv = do_sub_sv(ctx, dest, in1, in2); | |
878 | } | |
879 | ||
880 | /* Form the condition for the compare. */ | |
881 | cond = do_sub_cond(cf, dest, in1, in2, sv); | |
882 | ||
883 | /* Clear. */ | |
884 | tcg_gen_movi_tl(dest, 0); | |
885 | save_gpr(ctx, rt, dest); | |
886 | tcg_temp_free(dest); | |
887 | ||
888 | /* Install the new nullification. */ | |
889 | cond_free(&ctx->null_cond); | |
890 | ctx->null_cond = cond; | |
891 | return NO_EXIT; | |
892 | } | |
893 | ||
894 | static ExitStatus do_log(DisasContext *ctx, unsigned rt, TCGv in1, TCGv in2, | |
895 | unsigned cf, void (*fn)(TCGv, TCGv, TCGv)) | |
896 | { | |
897 | TCGv dest = dest_gpr(ctx, rt); | |
898 | ||
899 | /* Perform the operation, and writeback. */ | |
900 | fn(dest, in1, in2); | |
901 | save_gpr(ctx, rt, dest); | |
902 | ||
903 | /* Install the new nullification. */ | |
904 | cond_free(&ctx->null_cond); | |
905 | if (cf) { | |
906 | ctx->null_cond = do_log_cond(cf, dest); | |
907 | } | |
908 | return NO_EXIT; | |
909 | } | |
910 | ||
911 | static ExitStatus do_unit(DisasContext *ctx, unsigned rt, TCGv in1, | |
912 | TCGv in2, unsigned cf, bool is_tc, | |
913 | void (*fn)(TCGv, TCGv, TCGv)) | |
914 | { | |
915 | TCGv dest; | |
916 | DisasCond cond; | |
917 | ||
918 | if (cf == 0) { | |
919 | dest = dest_gpr(ctx, rt); | |
920 | fn(dest, in1, in2); | |
921 | save_gpr(ctx, rt, dest); | |
922 | cond_free(&ctx->null_cond); | |
923 | } else { | |
924 | dest = tcg_temp_new(); | |
925 | fn(dest, in1, in2); | |
926 | ||
927 | cond = do_unit_cond(cf, dest, in1, in2); | |
928 | ||
929 | if (is_tc) { | |
930 | TCGv tmp = tcg_temp_new(); | |
931 | cond_prep(&cond); | |
932 | tcg_gen_setcond_tl(cond.c, tmp, cond.a0, cond.a1); | |
933 | gen_helper_tcond(cpu_env, tmp); | |
934 | tcg_temp_free(tmp); | |
935 | } | |
936 | save_gpr(ctx, rt, dest); | |
937 | ||
938 | cond_free(&ctx->null_cond); | |
939 | ctx->null_cond = cond; | |
940 | } | |
941 | return NO_EXIT; | |
942 | } | |
943 | ||
98cd9ca7 RH |
944 | /* Emit an unconditional branch to a direct target, which may or may not |
945 | have already had nullification handled. */ | |
946 | static ExitStatus do_dbranch(DisasContext *ctx, target_ulong dest, | |
947 | unsigned link, bool is_n) | |
948 | { | |
949 | if (ctx->null_cond.c == TCG_COND_NEVER && ctx->null_lab == NULL) { | |
950 | if (link != 0) { | |
951 | copy_iaoq_entry(cpu_gr[link], ctx->iaoq_n, ctx->iaoq_n_var); | |
952 | } | |
953 | ctx->iaoq_n = dest; | |
954 | if (is_n) { | |
955 | ctx->null_cond.c = TCG_COND_ALWAYS; | |
956 | } | |
957 | return NO_EXIT; | |
958 | } else { | |
959 | nullify_over(ctx); | |
960 | ||
961 | if (link != 0) { | |
962 | copy_iaoq_entry(cpu_gr[link], ctx->iaoq_n, ctx->iaoq_n_var); | |
963 | } | |
964 | ||
965 | if (is_n && use_nullify_skip(ctx)) { | |
966 | nullify_set(ctx, 0); | |
967 | gen_goto_tb(ctx, 0, dest, dest + 4); | |
968 | } else { | |
969 | nullify_set(ctx, is_n); | |
970 | gen_goto_tb(ctx, 0, ctx->iaoq_b, dest); | |
971 | } | |
972 | ||
973 | nullify_end(ctx, NO_EXIT); | |
974 | ||
975 | nullify_set(ctx, 0); | |
976 | gen_goto_tb(ctx, 1, ctx->iaoq_b, ctx->iaoq_n); | |
977 | return EXIT_GOTO_TB; | |
978 | } | |
979 | } | |
980 | ||
981 | /* Emit a conditional branch to a direct target. If the branch itself | |
982 | is nullified, we should have already used nullify_over. */ | |
983 | static ExitStatus do_cbranch(DisasContext *ctx, target_long disp, bool is_n, | |
984 | DisasCond *cond) | |
985 | { | |
986 | target_ulong dest = iaoq_dest(ctx, disp); | |
987 | TCGLabel *taken = NULL; | |
988 | TCGCond c = cond->c; | |
989 | int which = 0; | |
990 | bool n; | |
991 | ||
992 | assert(ctx->null_cond.c == TCG_COND_NEVER); | |
993 | ||
994 | /* Handle TRUE and NEVER as direct branches. */ | |
995 | if (c == TCG_COND_ALWAYS) { | |
996 | return do_dbranch(ctx, dest, 0, is_n && disp >= 0); | |
997 | } | |
998 | if (c == TCG_COND_NEVER) { | |
999 | return do_dbranch(ctx, ctx->iaoq_n, 0, is_n && disp < 0); | |
1000 | } | |
1001 | ||
1002 | taken = gen_new_label(); | |
1003 | cond_prep(cond); | |
1004 | tcg_gen_brcond_tl(c, cond->a0, cond->a1, taken); | |
1005 | cond_free(cond); | |
1006 | ||
1007 | /* Not taken: Condition not satisfied; nullify on backward branches. */ | |
1008 | n = is_n && disp < 0; | |
1009 | if (n && use_nullify_skip(ctx)) { | |
1010 | nullify_set(ctx, 0); | |
1011 | gen_goto_tb(ctx, which++, ctx->iaoq_n, ctx->iaoq_n + 4); | |
1012 | } else { | |
1013 | if (!n && ctx->null_lab) { | |
1014 | gen_set_label(ctx->null_lab); | |
1015 | ctx->null_lab = NULL; | |
1016 | } | |
1017 | nullify_set(ctx, n); | |
1018 | gen_goto_tb(ctx, which++, ctx->iaoq_b, ctx->iaoq_n); | |
1019 | } | |
1020 | ||
1021 | gen_set_label(taken); | |
1022 | ||
1023 | /* Taken: Condition satisfied; nullify on forward branches. */ | |
1024 | n = is_n && disp >= 0; | |
1025 | if (n && use_nullify_skip(ctx)) { | |
1026 | nullify_set(ctx, 0); | |
1027 | gen_goto_tb(ctx, which++, dest, dest + 4); | |
1028 | } else { | |
1029 | nullify_set(ctx, n); | |
1030 | gen_goto_tb(ctx, which++, ctx->iaoq_b, dest); | |
1031 | } | |
1032 | ||
1033 | /* Not taken: the branch itself was nullified. */ | |
1034 | if (ctx->null_lab) { | |
1035 | gen_set_label(ctx->null_lab); | |
1036 | ctx->null_lab = NULL; | |
1037 | if (which < 2) { | |
1038 | nullify_set(ctx, 0); | |
1039 | gen_goto_tb(ctx, which, ctx->iaoq_b, ctx->iaoq_n); | |
1040 | return EXIT_GOTO_TB; | |
1041 | } else { | |
1042 | return EXIT_IAQ_N_STALE; | |
1043 | } | |
1044 | } else { | |
1045 | return EXIT_GOTO_TB; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | /* Emit an unconditional branch to an indirect target. This handles | |
1050 | nullification of the branch itself. */ | |
1051 | static ExitStatus do_ibranch(DisasContext *ctx, TCGv dest, | |
1052 | unsigned link, bool is_n) | |
1053 | { | |
1054 | TCGv a0, a1, next, tmp; | |
1055 | TCGCond c; | |
1056 | ||
1057 | assert(ctx->null_lab == NULL); | |
1058 | ||
1059 | if (ctx->null_cond.c == TCG_COND_NEVER) { | |
1060 | if (link != 0) { | |
1061 | copy_iaoq_entry(cpu_gr[link], ctx->iaoq_n, ctx->iaoq_n_var); | |
1062 | } | |
1063 | next = get_temp(ctx); | |
1064 | tcg_gen_mov_tl(next, dest); | |
1065 | ctx->iaoq_n = -1; | |
1066 | ctx->iaoq_n_var = next; | |
1067 | if (is_n) { | |
1068 | ctx->null_cond.c = TCG_COND_ALWAYS; | |
1069 | } | |
1070 | } else if (is_n && use_nullify_skip(ctx)) { | |
1071 | /* The (conditional) branch, B, nullifies the next insn, N, | |
1072 | and we're allowed to skip execution N (no single-step or | |
1073 | tracepoint in effect). Since the exit_tb that we must use | |
1074 | for the indirect branch consumes no special resources, we | |
1075 | can (conditionally) skip B and continue execution. */ | |
1076 | /* The use_nullify_skip test implies we have a known control path. */ | |
1077 | tcg_debug_assert(ctx->iaoq_b != -1); | |
1078 | tcg_debug_assert(ctx->iaoq_n != -1); | |
1079 | ||
1080 | /* We do have to handle the non-local temporary, DEST, before | |
1081 | branching. Since IOAQ_F is not really live at this point, we | |
1082 | can simply store DEST optimistically. Similarly with IAOQ_B. */ | |
1083 | tcg_gen_mov_tl(cpu_iaoq_f, dest); | |
1084 | tcg_gen_addi_tl(cpu_iaoq_b, dest, 4); | |
1085 | ||
1086 | nullify_over(ctx); | |
1087 | if (link != 0) { | |
1088 | tcg_gen_movi_tl(cpu_gr[link], ctx->iaoq_n); | |
1089 | } | |
1090 | tcg_gen_exit_tb(0); | |
1091 | return nullify_end(ctx, NO_EXIT); | |
1092 | } else { | |
1093 | cond_prep(&ctx->null_cond); | |
1094 | c = ctx->null_cond.c; | |
1095 | a0 = ctx->null_cond.a0; | |
1096 | a1 = ctx->null_cond.a1; | |
1097 | ||
1098 | tmp = tcg_temp_new(); | |
1099 | next = get_temp(ctx); | |
1100 | ||
1101 | copy_iaoq_entry(tmp, ctx->iaoq_n, ctx->iaoq_n_var); | |
1102 | tcg_gen_movcond_tl(c, next, a0, a1, tmp, dest); | |
1103 | ctx->iaoq_n = -1; | |
1104 | ctx->iaoq_n_var = next; | |
1105 | ||
1106 | if (link != 0) { | |
1107 | tcg_gen_movcond_tl(c, cpu_gr[link], a0, a1, cpu_gr[link], tmp); | |
1108 | } | |
1109 | ||
1110 | if (is_n) { | |
1111 | /* The branch nullifies the next insn, which means the state of N | |
1112 | after the branch is the inverse of the state of N that applied | |
1113 | to the branch. */ | |
1114 | tcg_gen_setcond_tl(tcg_invert_cond(c), cpu_psw_n, a0, a1); | |
1115 | cond_free(&ctx->null_cond); | |
1116 | ctx->null_cond = cond_make_n(); | |
1117 | ctx->psw_n_nonzero = true; | |
1118 | } else { | |
1119 | cond_free(&ctx->null_cond); | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | return NO_EXIT; | |
1124 | } | |
1125 | ||
7ad439df RH |
1126 | /* On Linux, page zero is normally marked execute only + gateway. |
1127 | Therefore normal read or write is supposed to fail, but specific | |
1128 | offsets have kernel code mapped to raise permissions to implement | |
1129 | system calls. Handling this via an explicit check here, rather | |
1130 | in than the "be disp(sr2,r0)" instruction that probably sent us | |
1131 | here, is the easiest way to handle the branch delay slot on the | |
1132 | aforementioned BE. */ | |
1133 | static ExitStatus do_page_zero(DisasContext *ctx) | |
1134 | { | |
1135 | /* If by some means we get here with PSW[N]=1, that implies that | |
1136 | the B,GATE instruction would be skipped, and we'd fault on the | |
1137 | next insn within the privilaged page. */ | |
1138 | switch (ctx->null_cond.c) { | |
1139 | case TCG_COND_NEVER: | |
1140 | break; | |
1141 | case TCG_COND_ALWAYS: | |
1142 | tcg_gen_movi_tl(cpu_psw_n, 0); | |
1143 | goto do_sigill; | |
1144 | default: | |
1145 | /* Since this is always the first (and only) insn within the | |
1146 | TB, we should know the state of PSW[N] from TB->FLAGS. */ | |
1147 | g_assert_not_reached(); | |
1148 | } | |
1149 | ||
1150 | /* Check that we didn't arrive here via some means that allowed | |
1151 | non-sequential instruction execution. Normally the PSW[B] bit | |
1152 | detects this by disallowing the B,GATE instruction to execute | |
1153 | under such conditions. */ | |
1154 | if (ctx->iaoq_b != ctx->iaoq_f + 4) { | |
1155 | goto do_sigill; | |
1156 | } | |
1157 | ||
1158 | switch (ctx->iaoq_f) { | |
1159 | case 0x00: /* Null pointer call */ | |
1160 | gen_excp_1(EXCP_SIGSEGV); | |
1161 | return EXIT_NORETURN; | |
1162 | ||
1163 | case 0xb0: /* LWS */ | |
1164 | gen_excp_1(EXCP_SYSCALL_LWS); | |
1165 | return EXIT_NORETURN; | |
1166 | ||
1167 | case 0xe0: /* SET_THREAD_POINTER */ | |
1168 | tcg_gen_mov_tl(cpu_cr27, cpu_gr[26]); | |
1169 | tcg_gen_mov_tl(cpu_iaoq_f, cpu_gr[31]); | |
1170 | tcg_gen_addi_tl(cpu_iaoq_b, cpu_iaoq_f, 4); | |
1171 | return EXIT_IAQ_N_UPDATED; | |
1172 | ||
1173 | case 0x100: /* SYSCALL */ | |
1174 | gen_excp_1(EXCP_SYSCALL); | |
1175 | return EXIT_NORETURN; | |
1176 | ||
1177 | default: | |
1178 | do_sigill: | |
1179 | gen_excp_1(EXCP_SIGILL); | |
1180 | return EXIT_NORETURN; | |
1181 | } | |
1182 | } | |
1183 | ||
b2167459 RH |
1184 | static ExitStatus trans_nop(DisasContext *ctx, uint32_t insn, |
1185 | const DisasInsn *di) | |
1186 | { | |
1187 | cond_free(&ctx->null_cond); | |
1188 | return NO_EXIT; | |
1189 | } | |
1190 | ||
1191 | static ExitStatus trans_add(DisasContext *ctx, uint32_t insn, | |
1192 | const DisasInsn *di) | |
1193 | { | |
1194 | unsigned r2 = extract32(insn, 21, 5); | |
1195 | unsigned r1 = extract32(insn, 16, 5); | |
1196 | unsigned cf = extract32(insn, 12, 4); | |
1197 | unsigned ext = extract32(insn, 8, 4); | |
1198 | unsigned shift = extract32(insn, 6, 2); | |
1199 | unsigned rt = extract32(insn, 0, 5); | |
1200 | TCGv tcg_r1, tcg_r2; | |
1201 | bool is_c = false; | |
1202 | bool is_l = false; | |
1203 | bool is_tc = false; | |
1204 | bool is_tsv = false; | |
1205 | ExitStatus ret; | |
1206 | ||
1207 | switch (ext) { | |
1208 | case 0x6: /* ADD, SHLADD */ | |
1209 | break; | |
1210 | case 0xa: /* ADD,L, SHLADD,L */ | |
1211 | is_l = true; | |
1212 | break; | |
1213 | case 0xe: /* ADD,TSV, SHLADD,TSV (1) */ | |
1214 | is_tsv = true; | |
1215 | break; | |
1216 | case 0x7: /* ADD,C */ | |
1217 | is_c = true; | |
1218 | break; | |
1219 | case 0xf: /* ADD,C,TSV */ | |
1220 | is_c = is_tsv = true; | |
1221 | break; | |
1222 | default: | |
1223 | return gen_illegal(ctx); | |
1224 | } | |
1225 | ||
1226 | if (cf) { | |
1227 | nullify_over(ctx); | |
1228 | } | |
1229 | tcg_r1 = load_gpr(ctx, r1); | |
1230 | tcg_r2 = load_gpr(ctx, r2); | |
1231 | ret = do_add(ctx, rt, tcg_r1, tcg_r2, shift, is_l, is_tsv, is_tc, is_c, cf); | |
1232 | return nullify_end(ctx, ret); | |
1233 | } | |
1234 | ||
1235 | static ExitStatus trans_sub(DisasContext *ctx, uint32_t insn, | |
1236 | const DisasInsn *di) | |
1237 | { | |
1238 | unsigned r2 = extract32(insn, 21, 5); | |
1239 | unsigned r1 = extract32(insn, 16, 5); | |
1240 | unsigned cf = extract32(insn, 12, 4); | |
1241 | unsigned ext = extract32(insn, 6, 6); | |
1242 | unsigned rt = extract32(insn, 0, 5); | |
1243 | TCGv tcg_r1, tcg_r2; | |
1244 | bool is_b = false; | |
1245 | bool is_tc = false; | |
1246 | bool is_tsv = false; | |
1247 | ExitStatus ret; | |
1248 | ||
1249 | switch (ext) { | |
1250 | case 0x10: /* SUB */ | |
1251 | break; | |
1252 | case 0x30: /* SUB,TSV */ | |
1253 | is_tsv = true; | |
1254 | break; | |
1255 | case 0x14: /* SUB,B */ | |
1256 | is_b = true; | |
1257 | break; | |
1258 | case 0x34: /* SUB,B,TSV */ | |
1259 | is_b = is_tsv = true; | |
1260 | break; | |
1261 | case 0x13: /* SUB,TC */ | |
1262 | is_tc = true; | |
1263 | break; | |
1264 | case 0x33: /* SUB,TSV,TC */ | |
1265 | is_tc = is_tsv = true; | |
1266 | break; | |
1267 | default: | |
1268 | return gen_illegal(ctx); | |
1269 | } | |
1270 | ||
1271 | if (cf) { | |
1272 | nullify_over(ctx); | |
1273 | } | |
1274 | tcg_r1 = load_gpr(ctx, r1); | |
1275 | tcg_r2 = load_gpr(ctx, r2); | |
1276 | ret = do_sub(ctx, rt, tcg_r1, tcg_r2, is_tsv, is_b, is_tc, cf); | |
1277 | return nullify_end(ctx, ret); | |
1278 | } | |
1279 | ||
1280 | static ExitStatus trans_log(DisasContext *ctx, uint32_t insn, | |
1281 | const DisasInsn *di) | |
1282 | { | |
1283 | unsigned r2 = extract32(insn, 21, 5); | |
1284 | unsigned r1 = extract32(insn, 16, 5); | |
1285 | unsigned cf = extract32(insn, 12, 4); | |
1286 | unsigned rt = extract32(insn, 0, 5); | |
1287 | TCGv tcg_r1, tcg_r2; | |
1288 | ExitStatus ret; | |
1289 | ||
1290 | if (cf) { | |
1291 | nullify_over(ctx); | |
1292 | } | |
1293 | tcg_r1 = load_gpr(ctx, r1); | |
1294 | tcg_r2 = load_gpr(ctx, r2); | |
1295 | ret = do_log(ctx, rt, tcg_r1, tcg_r2, cf, di->f_ttt); | |
1296 | return nullify_end(ctx, ret); | |
1297 | } | |
1298 | ||
1299 | /* OR r,0,t -> COPY (according to gas) */ | |
1300 | static ExitStatus trans_copy(DisasContext *ctx, uint32_t insn, | |
1301 | const DisasInsn *di) | |
1302 | { | |
1303 | unsigned r1 = extract32(insn, 16, 5); | |
1304 | unsigned rt = extract32(insn, 0, 5); | |
1305 | ||
1306 | if (r1 == 0) { | |
1307 | TCGv dest = dest_gpr(ctx, rt); | |
1308 | tcg_gen_movi_tl(dest, 0); | |
1309 | save_gpr(ctx, rt, dest); | |
1310 | } else { | |
1311 | save_gpr(ctx, rt, cpu_gr[r1]); | |
1312 | } | |
1313 | cond_free(&ctx->null_cond); | |
1314 | return NO_EXIT; | |
1315 | } | |
1316 | ||
1317 | static ExitStatus trans_cmpclr(DisasContext *ctx, uint32_t insn, | |
1318 | const DisasInsn *di) | |
1319 | { | |
1320 | unsigned r2 = extract32(insn, 21, 5); | |
1321 | unsigned r1 = extract32(insn, 16, 5); | |
1322 | unsigned cf = extract32(insn, 12, 4); | |
1323 | unsigned rt = extract32(insn, 0, 5); | |
1324 | TCGv tcg_r1, tcg_r2; | |
1325 | ExitStatus ret; | |
1326 | ||
1327 | if (cf) { | |
1328 | nullify_over(ctx); | |
1329 | } | |
1330 | tcg_r1 = load_gpr(ctx, r1); | |
1331 | tcg_r2 = load_gpr(ctx, r2); | |
1332 | ret = do_cmpclr(ctx, rt, tcg_r1, tcg_r2, cf); | |
1333 | return nullify_end(ctx, ret); | |
1334 | } | |
1335 | ||
1336 | static ExitStatus trans_uxor(DisasContext *ctx, uint32_t insn, | |
1337 | const DisasInsn *di) | |
1338 | { | |
1339 | unsigned r2 = extract32(insn, 21, 5); | |
1340 | unsigned r1 = extract32(insn, 16, 5); | |
1341 | unsigned cf = extract32(insn, 12, 4); | |
1342 | unsigned rt = extract32(insn, 0, 5); | |
1343 | TCGv tcg_r1, tcg_r2; | |
1344 | ExitStatus ret; | |
1345 | ||
1346 | if (cf) { | |
1347 | nullify_over(ctx); | |
1348 | } | |
1349 | tcg_r1 = load_gpr(ctx, r1); | |
1350 | tcg_r2 = load_gpr(ctx, r2); | |
1351 | ret = do_unit(ctx, rt, tcg_r1, tcg_r2, cf, false, tcg_gen_xor_tl); | |
1352 | return nullify_end(ctx, ret); | |
1353 | } | |
1354 | ||
1355 | static ExitStatus trans_uaddcm(DisasContext *ctx, uint32_t insn, | |
1356 | const DisasInsn *di) | |
1357 | { | |
1358 | unsigned r2 = extract32(insn, 21, 5); | |
1359 | unsigned r1 = extract32(insn, 16, 5); | |
1360 | unsigned cf = extract32(insn, 12, 4); | |
1361 | unsigned is_tc = extract32(insn, 6, 1); | |
1362 | unsigned rt = extract32(insn, 0, 5); | |
1363 | TCGv tcg_r1, tcg_r2, tmp; | |
1364 | ExitStatus ret; | |
1365 | ||
1366 | if (cf) { | |
1367 | nullify_over(ctx); | |
1368 | } | |
1369 | tcg_r1 = load_gpr(ctx, r1); | |
1370 | tcg_r2 = load_gpr(ctx, r2); | |
1371 | tmp = get_temp(ctx); | |
1372 | tcg_gen_not_tl(tmp, tcg_r2); | |
1373 | ret = do_unit(ctx, rt, tcg_r1, tmp, cf, is_tc, tcg_gen_add_tl); | |
1374 | return nullify_end(ctx, ret); | |
1375 | } | |
1376 | ||
1377 | static ExitStatus trans_dcor(DisasContext *ctx, uint32_t insn, | |
1378 | const DisasInsn *di) | |
1379 | { | |
1380 | unsigned r2 = extract32(insn, 21, 5); | |
1381 | unsigned cf = extract32(insn, 12, 4); | |
1382 | unsigned is_i = extract32(insn, 6, 1); | |
1383 | unsigned rt = extract32(insn, 0, 5); | |
1384 | TCGv tmp; | |
1385 | ExitStatus ret; | |
1386 | ||
1387 | nullify_over(ctx); | |
1388 | ||
1389 | tmp = get_temp(ctx); | |
1390 | tcg_gen_shri_tl(tmp, cpu_psw_cb, 3); | |
1391 | if (!is_i) { | |
1392 | tcg_gen_not_tl(tmp, tmp); | |
1393 | } | |
1394 | tcg_gen_andi_tl(tmp, tmp, 0x11111111); | |
1395 | tcg_gen_muli_tl(tmp, tmp, 6); | |
1396 | ret = do_unit(ctx, rt, tmp, load_gpr(ctx, r2), cf, false, | |
1397 | is_i ? tcg_gen_add_tl : tcg_gen_sub_tl); | |
1398 | ||
1399 | return nullify_end(ctx, ret); | |
1400 | } | |
1401 | ||
1402 | static ExitStatus trans_ds(DisasContext *ctx, uint32_t insn, | |
1403 | const DisasInsn *di) | |
1404 | { | |
1405 | unsigned r2 = extract32(insn, 21, 5); | |
1406 | unsigned r1 = extract32(insn, 16, 5); | |
1407 | unsigned cf = extract32(insn, 12, 4); | |
1408 | unsigned rt = extract32(insn, 0, 5); | |
1409 | TCGv dest, add1, add2, addc, zero, in1, in2; | |
1410 | ||
1411 | nullify_over(ctx); | |
1412 | ||
1413 | in1 = load_gpr(ctx, r1); | |
1414 | in2 = load_gpr(ctx, r2); | |
1415 | ||
1416 | add1 = tcg_temp_new(); | |
1417 | add2 = tcg_temp_new(); | |
1418 | addc = tcg_temp_new(); | |
1419 | dest = tcg_temp_new(); | |
1420 | zero = tcg_const_tl(0); | |
1421 | ||
1422 | /* Form R1 << 1 | PSW[CB]{8}. */ | |
1423 | tcg_gen_add_tl(add1, in1, in1); | |
1424 | tcg_gen_add_tl(add1, add1, cpu_psw_cb_msb); | |
1425 | ||
1426 | /* Add or subtract R2, depending on PSW[V]. Proper computation of | |
1427 | carry{8} requires that we subtract via + ~R2 + 1, as described in | |
1428 | the manual. By extracting and masking V, we can produce the | |
1429 | proper inputs to the addition without movcond. */ | |
1430 | tcg_gen_sari_tl(addc, cpu_psw_v, TARGET_LONG_BITS - 1); | |
1431 | tcg_gen_xor_tl(add2, in2, addc); | |
1432 | tcg_gen_andi_tl(addc, addc, 1); | |
1433 | /* ??? This is only correct for 32-bit. */ | |
1434 | tcg_gen_add2_i32(dest, cpu_psw_cb_msb, add1, zero, add2, zero); | |
1435 | tcg_gen_add2_i32(dest, cpu_psw_cb_msb, dest, cpu_psw_cb_msb, addc, zero); | |
1436 | ||
1437 | tcg_temp_free(addc); | |
1438 | tcg_temp_free(zero); | |
1439 | ||
1440 | /* Write back the result register. */ | |
1441 | save_gpr(ctx, rt, dest); | |
1442 | ||
1443 | /* Write back PSW[CB]. */ | |
1444 | tcg_gen_xor_tl(cpu_psw_cb, add1, add2); | |
1445 | tcg_gen_xor_tl(cpu_psw_cb, cpu_psw_cb, dest); | |
1446 | ||
1447 | /* Write back PSW[V] for the division step. */ | |
1448 | tcg_gen_neg_tl(cpu_psw_v, cpu_psw_cb_msb); | |
1449 | tcg_gen_xor_tl(cpu_psw_v, cpu_psw_v, in2); | |
1450 | ||
1451 | /* Install the new nullification. */ | |
1452 | if (cf) { | |
1453 | TCGv sv; | |
1454 | TCGV_UNUSED(sv); | |
1455 | if (cf >> 1 == 6) { | |
1456 | /* ??? The lshift is supposed to contribute to overflow. */ | |
1457 | sv = do_add_sv(ctx, dest, add1, add2); | |
1458 | } | |
1459 | ctx->null_cond = do_cond(cf, dest, cpu_psw_cb_msb, sv); | |
1460 | } | |
1461 | ||
1462 | tcg_temp_free(add1); | |
1463 | tcg_temp_free(add2); | |
1464 | tcg_temp_free(dest); | |
1465 | ||
1466 | return nullify_end(ctx, NO_EXIT); | |
1467 | } | |
1468 | ||
1469 | static const DisasInsn table_arith_log[] = { | |
1470 | { 0x08000240u, 0xfc00ffffu, trans_nop }, /* or x,y,0 */ | |
1471 | { 0x08000240u, 0xffe0ffe0u, trans_copy }, /* or x,0,t */ | |
1472 | { 0x08000000u, 0xfc000fe0u, trans_log, .f_ttt = tcg_gen_andc_tl }, | |
1473 | { 0x08000200u, 0xfc000fe0u, trans_log, .f_ttt = tcg_gen_and_tl }, | |
1474 | { 0x08000240u, 0xfc000fe0u, trans_log, .f_ttt = tcg_gen_or_tl }, | |
1475 | { 0x08000280u, 0xfc000fe0u, trans_log, .f_ttt = tcg_gen_xor_tl }, | |
1476 | { 0x08000880u, 0xfc000fe0u, trans_cmpclr }, | |
1477 | { 0x08000380u, 0xfc000fe0u, trans_uxor }, | |
1478 | { 0x08000980u, 0xfc000fa0u, trans_uaddcm }, | |
1479 | { 0x08000b80u, 0xfc1f0fa0u, trans_dcor }, | |
1480 | { 0x08000440u, 0xfc000fe0u, trans_ds }, | |
1481 | { 0x08000700u, 0xfc0007e0u, trans_add }, /* add */ | |
1482 | { 0x08000400u, 0xfc0006e0u, trans_sub }, /* sub; sub,b; sub,tsv */ | |
1483 | { 0x080004c0u, 0xfc0007e0u, trans_sub }, /* sub,tc; sub,tsv,tc */ | |
1484 | { 0x08000200u, 0xfc000320u, trans_add }, /* shladd */ | |
1485 | }; | |
1486 | ||
1487 | static ExitStatus trans_addi(DisasContext *ctx, uint32_t insn) | |
1488 | { | |
1489 | target_long im = low_sextract(insn, 0, 11); | |
1490 | unsigned e1 = extract32(insn, 11, 1); | |
1491 | unsigned cf = extract32(insn, 12, 4); | |
1492 | unsigned rt = extract32(insn, 16, 5); | |
1493 | unsigned r2 = extract32(insn, 21, 5); | |
1494 | unsigned o1 = extract32(insn, 26, 1); | |
1495 | TCGv tcg_im, tcg_r2; | |
1496 | ExitStatus ret; | |
1497 | ||
1498 | if (cf) { | |
1499 | nullify_over(ctx); | |
1500 | } | |
1501 | ||
1502 | tcg_im = load_const(ctx, im); | |
1503 | tcg_r2 = load_gpr(ctx, r2); | |
1504 | ret = do_add(ctx, rt, tcg_im, tcg_r2, 0, false, e1, !o1, false, cf); | |
1505 | ||
1506 | return nullify_end(ctx, ret); | |
1507 | } | |
1508 | ||
1509 | static ExitStatus trans_subi(DisasContext *ctx, uint32_t insn) | |
1510 | { | |
1511 | target_long im = low_sextract(insn, 0, 11); | |
1512 | unsigned e1 = extract32(insn, 11, 1); | |
1513 | unsigned cf = extract32(insn, 12, 4); | |
1514 | unsigned rt = extract32(insn, 16, 5); | |
1515 | unsigned r2 = extract32(insn, 21, 5); | |
1516 | TCGv tcg_im, tcg_r2; | |
1517 | ExitStatus ret; | |
1518 | ||
1519 | if (cf) { | |
1520 | nullify_over(ctx); | |
1521 | } | |
1522 | ||
1523 | tcg_im = load_const(ctx, im); | |
1524 | tcg_r2 = load_gpr(ctx, r2); | |
1525 | ret = do_sub(ctx, rt, tcg_im, tcg_r2, e1, false, false, cf); | |
1526 | ||
1527 | return nullify_end(ctx, ret); | |
1528 | } | |
1529 | ||
1530 | static ExitStatus trans_cmpiclr(DisasContext *ctx, uint32_t insn) | |
1531 | { | |
1532 | target_long im = low_sextract(insn, 0, 11); | |
1533 | unsigned cf = extract32(insn, 12, 4); | |
1534 | unsigned rt = extract32(insn, 16, 5); | |
1535 | unsigned r2 = extract32(insn, 21, 5); | |
1536 | TCGv tcg_im, tcg_r2; | |
1537 | ExitStatus ret; | |
1538 | ||
1539 | if (cf) { | |
1540 | nullify_over(ctx); | |
1541 | } | |
1542 | ||
1543 | tcg_im = load_const(ctx, im); | |
1544 | tcg_r2 = load_gpr(ctx, r2); | |
1545 | ret = do_cmpclr(ctx, rt, tcg_im, tcg_r2, cf); | |
1546 | ||
1547 | return nullify_end(ctx, ret); | |
1548 | } | |
1549 | ||
1550 | static ExitStatus trans_ldil(DisasContext *ctx, uint32_t insn) | |
1551 | { | |
1552 | unsigned rt = extract32(insn, 21, 5); | |
1553 | target_long i = assemble_21(insn); | |
1554 | TCGv tcg_rt = dest_gpr(ctx, rt); | |
1555 | ||
1556 | tcg_gen_movi_tl(tcg_rt, i); | |
1557 | save_gpr(ctx, rt, tcg_rt); | |
1558 | cond_free(&ctx->null_cond); | |
1559 | ||
1560 | return NO_EXIT; | |
1561 | } | |
1562 | ||
1563 | static ExitStatus trans_addil(DisasContext *ctx, uint32_t insn) | |
1564 | { | |
1565 | unsigned rt = extract32(insn, 21, 5); | |
1566 | target_long i = assemble_21(insn); | |
1567 | TCGv tcg_rt = load_gpr(ctx, rt); | |
1568 | TCGv tcg_r1 = dest_gpr(ctx, 1); | |
1569 | ||
1570 | tcg_gen_addi_tl(tcg_r1, tcg_rt, i); | |
1571 | save_gpr(ctx, 1, tcg_r1); | |
1572 | cond_free(&ctx->null_cond); | |
1573 | ||
1574 | return NO_EXIT; | |
1575 | } | |
1576 | ||
1577 | static ExitStatus trans_ldo(DisasContext *ctx, uint32_t insn) | |
1578 | { | |
1579 | unsigned rb = extract32(insn, 21, 5); | |
1580 | unsigned rt = extract32(insn, 16, 5); | |
1581 | target_long i = assemble_16(insn); | |
1582 | TCGv tcg_rt = dest_gpr(ctx, rt); | |
1583 | ||
1584 | /* Special case rb == 0, for the LDI pseudo-op. | |
1585 | The COPY pseudo-op is handled for free within tcg_gen_addi_tl. */ | |
1586 | if (rb == 0) { | |
1587 | tcg_gen_movi_tl(tcg_rt, i); | |
1588 | } else { | |
1589 | tcg_gen_addi_tl(tcg_rt, cpu_gr[rb], i); | |
1590 | } | |
1591 | save_gpr(ctx, rt, tcg_rt); | |
1592 | cond_free(&ctx->null_cond); | |
1593 | ||
1594 | return NO_EXIT; | |
1595 | } | |
1596 | ||
98cd9ca7 RH |
1597 | static ExitStatus trans_cmpb(DisasContext *ctx, uint32_t insn, |
1598 | bool is_true, bool is_imm, bool is_dw) | |
1599 | { | |
1600 | target_long disp = assemble_12(insn) * 4; | |
1601 | unsigned n = extract32(insn, 1, 1); | |
1602 | unsigned c = extract32(insn, 13, 3); | |
1603 | unsigned r = extract32(insn, 21, 5); | |
1604 | unsigned cf = c * 2 + !is_true; | |
1605 | TCGv dest, in1, in2, sv; | |
1606 | DisasCond cond; | |
1607 | ||
1608 | nullify_over(ctx); | |
1609 | ||
1610 | if (is_imm) { | |
1611 | in1 = load_const(ctx, low_sextract(insn, 16, 5)); | |
1612 | } else { | |
1613 | in1 = load_gpr(ctx, extract32(insn, 16, 5)); | |
1614 | } | |
1615 | in2 = load_gpr(ctx, r); | |
1616 | dest = get_temp(ctx); | |
1617 | ||
1618 | tcg_gen_sub_tl(dest, in1, in2); | |
1619 | ||
1620 | TCGV_UNUSED(sv); | |
1621 | if (c == 6) { | |
1622 | sv = do_sub_sv(ctx, dest, in1, in2); | |
1623 | } | |
1624 | ||
1625 | cond = do_sub_cond(cf, dest, in1, in2, sv); | |
1626 | return do_cbranch(ctx, disp, n, &cond); | |
1627 | } | |
1628 | ||
1629 | static ExitStatus trans_addb(DisasContext *ctx, uint32_t insn, | |
1630 | bool is_true, bool is_imm) | |
1631 | { | |
1632 | target_long disp = assemble_12(insn) * 4; | |
1633 | unsigned n = extract32(insn, 1, 1); | |
1634 | unsigned c = extract32(insn, 13, 3); | |
1635 | unsigned r = extract32(insn, 21, 5); | |
1636 | unsigned cf = c * 2 + !is_true; | |
1637 | TCGv dest, in1, in2, sv, cb_msb; | |
1638 | DisasCond cond; | |
1639 | ||
1640 | nullify_over(ctx); | |
1641 | ||
1642 | if (is_imm) { | |
1643 | in1 = load_const(ctx, low_sextract(insn, 16, 5)); | |
1644 | } else { | |
1645 | in1 = load_gpr(ctx, extract32(insn, 16, 5)); | |
1646 | } | |
1647 | in2 = load_gpr(ctx, r); | |
1648 | dest = dest_gpr(ctx, r); | |
1649 | TCGV_UNUSED(sv); | |
1650 | TCGV_UNUSED(cb_msb); | |
1651 | ||
1652 | switch (c) { | |
1653 | default: | |
1654 | tcg_gen_add_tl(dest, in1, in2); | |
1655 | break; | |
1656 | case 4: case 5: | |
1657 | cb_msb = get_temp(ctx); | |
1658 | tcg_gen_movi_tl(cb_msb, 0); | |
1659 | tcg_gen_add2_tl(dest, cb_msb, in1, cb_msb, in2, cb_msb); | |
1660 | break; | |
1661 | case 6: | |
1662 | tcg_gen_add_tl(dest, in1, in2); | |
1663 | sv = do_add_sv(ctx, dest, in1, in2); | |
1664 | break; | |
1665 | } | |
1666 | ||
1667 | cond = do_cond(cf, dest, cb_msb, sv); | |
1668 | return do_cbranch(ctx, disp, n, &cond); | |
1669 | } | |
1670 | ||
1671 | static ExitStatus trans_bb(DisasContext *ctx, uint32_t insn) | |
1672 | { | |
1673 | target_long disp = assemble_12(insn) * 4; | |
1674 | unsigned n = extract32(insn, 1, 1); | |
1675 | unsigned c = extract32(insn, 15, 1); | |
1676 | unsigned r = extract32(insn, 16, 5); | |
1677 | unsigned p = extract32(insn, 21, 5); | |
1678 | unsigned i = extract32(insn, 26, 1); | |
1679 | TCGv tmp, tcg_r; | |
1680 | DisasCond cond; | |
1681 | ||
1682 | nullify_over(ctx); | |
1683 | ||
1684 | tmp = tcg_temp_new(); | |
1685 | tcg_r = load_gpr(ctx, r); | |
1686 | if (i) { | |
1687 | tcg_gen_shli_tl(tmp, tcg_r, p); | |
1688 | } else { | |
1689 | tcg_gen_shl_tl(tmp, tcg_r, cpu_sar); | |
1690 | } | |
1691 | ||
1692 | cond = cond_make_0(c ? TCG_COND_GE : TCG_COND_LT, tmp); | |
1693 | tcg_temp_free(tmp); | |
1694 | return do_cbranch(ctx, disp, n, &cond); | |
1695 | } | |
1696 | ||
1697 | static ExitStatus trans_movb(DisasContext *ctx, uint32_t insn, bool is_imm) | |
1698 | { | |
1699 | target_long disp = assemble_12(insn) * 4; | |
1700 | unsigned n = extract32(insn, 1, 1); | |
1701 | unsigned c = extract32(insn, 13, 3); | |
1702 | unsigned t = extract32(insn, 16, 5); | |
1703 | unsigned r = extract32(insn, 21, 5); | |
1704 | TCGv dest; | |
1705 | DisasCond cond; | |
1706 | ||
1707 | nullify_over(ctx); | |
1708 | ||
1709 | dest = dest_gpr(ctx, r); | |
1710 | if (is_imm) { | |
1711 | tcg_gen_movi_tl(dest, low_sextract(t, 0, 5)); | |
1712 | } else if (t == 0) { | |
1713 | tcg_gen_movi_tl(dest, 0); | |
1714 | } else { | |
1715 | tcg_gen_mov_tl(dest, cpu_gr[t]); | |
1716 | } | |
1717 | ||
1718 | cond = do_sed_cond(c, dest); | |
1719 | return do_cbranch(ctx, disp, n, &cond); | |
1720 | } | |
1721 | ||
0b1347d2 RH |
1722 | static ExitStatus trans_shrpw_sar(DisasContext *ctx, uint32_t insn, |
1723 | const DisasInsn *di) | |
1724 | { | |
1725 | unsigned rt = extract32(insn, 0, 5); | |
1726 | unsigned c = extract32(insn, 13, 3); | |
1727 | unsigned r1 = extract32(insn, 16, 5); | |
1728 | unsigned r2 = extract32(insn, 21, 5); | |
1729 | TCGv dest; | |
1730 | ||
1731 | if (c) { | |
1732 | nullify_over(ctx); | |
1733 | } | |
1734 | ||
1735 | dest = dest_gpr(ctx, rt); | |
1736 | if (r1 == 0) { | |
1737 | tcg_gen_ext32u_tl(dest, load_gpr(ctx, r2)); | |
1738 | tcg_gen_shr_tl(dest, dest, cpu_sar); | |
1739 | } else if (r1 == r2) { | |
1740 | TCGv_i32 t32 = tcg_temp_new_i32(); | |
1741 | tcg_gen_trunc_tl_i32(t32, load_gpr(ctx, r2)); | |
1742 | tcg_gen_rotr_i32(t32, t32, cpu_sar); | |
1743 | tcg_gen_extu_i32_tl(dest, t32); | |
1744 | tcg_temp_free_i32(t32); | |
1745 | } else { | |
1746 | TCGv_i64 t = tcg_temp_new_i64(); | |
1747 | TCGv_i64 s = tcg_temp_new_i64(); | |
1748 | ||
1749 | tcg_gen_concat_tl_i64(t, load_gpr(ctx, r2), load_gpr(ctx, r1)); | |
1750 | tcg_gen_extu_tl_i64(s, cpu_sar); | |
1751 | tcg_gen_shr_i64(t, t, s); | |
1752 | tcg_gen_trunc_i64_tl(dest, t); | |
1753 | ||
1754 | tcg_temp_free_i64(t); | |
1755 | tcg_temp_free_i64(s); | |
1756 | } | |
1757 | save_gpr(ctx, rt, dest); | |
1758 | ||
1759 | /* Install the new nullification. */ | |
1760 | cond_free(&ctx->null_cond); | |
1761 | if (c) { | |
1762 | ctx->null_cond = do_sed_cond(c, dest); | |
1763 | } | |
1764 | return nullify_end(ctx, NO_EXIT); | |
1765 | } | |
1766 | ||
1767 | static ExitStatus trans_shrpw_imm(DisasContext *ctx, uint32_t insn, | |
1768 | const DisasInsn *di) | |
1769 | { | |
1770 | unsigned rt = extract32(insn, 0, 5); | |
1771 | unsigned cpos = extract32(insn, 5, 5); | |
1772 | unsigned c = extract32(insn, 13, 3); | |
1773 | unsigned r1 = extract32(insn, 16, 5); | |
1774 | unsigned r2 = extract32(insn, 21, 5); | |
1775 | unsigned sa = 31 - cpos; | |
1776 | TCGv dest, t2; | |
1777 | ||
1778 | if (c) { | |
1779 | nullify_over(ctx); | |
1780 | } | |
1781 | ||
1782 | dest = dest_gpr(ctx, rt); | |
1783 | t2 = load_gpr(ctx, r2); | |
1784 | if (r1 == r2) { | |
1785 | TCGv_i32 t32 = tcg_temp_new_i32(); | |
1786 | tcg_gen_trunc_tl_i32(t32, t2); | |
1787 | tcg_gen_rotri_i32(t32, t32, sa); | |
1788 | tcg_gen_extu_i32_tl(dest, t32); | |
1789 | tcg_temp_free_i32(t32); | |
1790 | } else if (r1 == 0) { | |
1791 | tcg_gen_extract_tl(dest, t2, sa, 32 - sa); | |
1792 | } else { | |
1793 | TCGv t0 = tcg_temp_new(); | |
1794 | tcg_gen_extract_tl(t0, t2, sa, 32 - sa); | |
1795 | tcg_gen_deposit_tl(dest, t0, cpu_gr[r1], 32 - sa, sa); | |
1796 | tcg_temp_free(t0); | |
1797 | } | |
1798 | save_gpr(ctx, rt, dest); | |
1799 | ||
1800 | /* Install the new nullification. */ | |
1801 | cond_free(&ctx->null_cond); | |
1802 | if (c) { | |
1803 | ctx->null_cond = do_sed_cond(c, dest); | |
1804 | } | |
1805 | return nullify_end(ctx, NO_EXIT); | |
1806 | } | |
1807 | ||
1808 | static ExitStatus trans_extrw_sar(DisasContext *ctx, uint32_t insn, | |
1809 | const DisasInsn *di) | |
1810 | { | |
1811 | unsigned clen = extract32(insn, 0, 5); | |
1812 | unsigned is_se = extract32(insn, 10, 1); | |
1813 | unsigned c = extract32(insn, 13, 3); | |
1814 | unsigned rt = extract32(insn, 16, 5); | |
1815 | unsigned rr = extract32(insn, 21, 5); | |
1816 | unsigned len = 32 - clen; | |
1817 | TCGv dest, src, tmp; | |
1818 | ||
1819 | if (c) { | |
1820 | nullify_over(ctx); | |
1821 | } | |
1822 | ||
1823 | dest = dest_gpr(ctx, rt); | |
1824 | src = load_gpr(ctx, rr); | |
1825 | tmp = tcg_temp_new(); | |
1826 | ||
1827 | /* Recall that SAR is using big-endian bit numbering. */ | |
1828 | tcg_gen_xori_tl(tmp, cpu_sar, TARGET_LONG_BITS - 1); | |
1829 | if (is_se) { | |
1830 | tcg_gen_sar_tl(dest, src, tmp); | |
1831 | tcg_gen_sextract_tl(dest, dest, 0, len); | |
1832 | } else { | |
1833 | tcg_gen_shr_tl(dest, src, tmp); | |
1834 | tcg_gen_extract_tl(dest, dest, 0, len); | |
1835 | } | |
1836 | tcg_temp_free(tmp); | |
1837 | save_gpr(ctx, rt, dest); | |
1838 | ||
1839 | /* Install the new nullification. */ | |
1840 | cond_free(&ctx->null_cond); | |
1841 | if (c) { | |
1842 | ctx->null_cond = do_sed_cond(c, dest); | |
1843 | } | |
1844 | return nullify_end(ctx, NO_EXIT); | |
1845 | } | |
1846 | ||
1847 | static ExitStatus trans_extrw_imm(DisasContext *ctx, uint32_t insn, | |
1848 | const DisasInsn *di) | |
1849 | { | |
1850 | unsigned clen = extract32(insn, 0, 5); | |
1851 | unsigned pos = extract32(insn, 5, 5); | |
1852 | unsigned is_se = extract32(insn, 10, 1); | |
1853 | unsigned c = extract32(insn, 13, 3); | |
1854 | unsigned rt = extract32(insn, 16, 5); | |
1855 | unsigned rr = extract32(insn, 21, 5); | |
1856 | unsigned len = 32 - clen; | |
1857 | unsigned cpos = 31 - pos; | |
1858 | TCGv dest, src; | |
1859 | ||
1860 | if (c) { | |
1861 | nullify_over(ctx); | |
1862 | } | |
1863 | ||
1864 | dest = dest_gpr(ctx, rt); | |
1865 | src = load_gpr(ctx, rr); | |
1866 | if (is_se) { | |
1867 | tcg_gen_sextract_tl(dest, src, cpos, len); | |
1868 | } else { | |
1869 | tcg_gen_extract_tl(dest, src, cpos, len); | |
1870 | } | |
1871 | save_gpr(ctx, rt, dest); | |
1872 | ||
1873 | /* Install the new nullification. */ | |
1874 | cond_free(&ctx->null_cond); | |
1875 | if (c) { | |
1876 | ctx->null_cond = do_sed_cond(c, dest); | |
1877 | } | |
1878 | return nullify_end(ctx, NO_EXIT); | |
1879 | } | |
1880 | ||
1881 | static const DisasInsn table_sh_ex[] = { | |
1882 | { 0xd0000000u, 0xfc001fe0u, trans_shrpw_sar }, | |
1883 | { 0xd0000800u, 0xfc001c00u, trans_shrpw_imm }, | |
1884 | { 0xd0001000u, 0xfc001be0u, trans_extrw_sar }, | |
1885 | { 0xd0001800u, 0xfc001800u, trans_extrw_imm }, | |
1886 | }; | |
1887 | ||
1888 | static ExitStatus trans_depw_imm_c(DisasContext *ctx, uint32_t insn, | |
1889 | const DisasInsn *di) | |
1890 | { | |
1891 | unsigned clen = extract32(insn, 0, 5); | |
1892 | unsigned cpos = extract32(insn, 5, 5); | |
1893 | unsigned nz = extract32(insn, 10, 1); | |
1894 | unsigned c = extract32(insn, 13, 3); | |
1895 | target_long val = low_sextract(insn, 16, 5); | |
1896 | unsigned rt = extract32(insn, 21, 5); | |
1897 | unsigned len = 32 - clen; | |
1898 | target_long mask0, mask1; | |
1899 | TCGv dest; | |
1900 | ||
1901 | if (c) { | |
1902 | nullify_over(ctx); | |
1903 | } | |
1904 | if (cpos + len > 32) { | |
1905 | len = 32 - cpos; | |
1906 | } | |
1907 | ||
1908 | dest = dest_gpr(ctx, rt); | |
1909 | mask0 = deposit64(0, cpos, len, val); | |
1910 | mask1 = deposit64(-1, cpos, len, val); | |
1911 | ||
1912 | if (nz) { | |
1913 | TCGv src = load_gpr(ctx, rt); | |
1914 | if (mask1 != -1) { | |
1915 | tcg_gen_andi_tl(dest, src, mask1); | |
1916 | src = dest; | |
1917 | } | |
1918 | tcg_gen_ori_tl(dest, src, mask0); | |
1919 | } else { | |
1920 | tcg_gen_movi_tl(dest, mask0); | |
1921 | } | |
1922 | save_gpr(ctx, rt, dest); | |
1923 | ||
1924 | /* Install the new nullification. */ | |
1925 | cond_free(&ctx->null_cond); | |
1926 | if (c) { | |
1927 | ctx->null_cond = do_sed_cond(c, dest); | |
1928 | } | |
1929 | return nullify_end(ctx, NO_EXIT); | |
1930 | } | |
1931 | ||
1932 | static ExitStatus trans_depw_imm(DisasContext *ctx, uint32_t insn, | |
1933 | const DisasInsn *di) | |
1934 | { | |
1935 | unsigned clen = extract32(insn, 0, 5); | |
1936 | unsigned cpos = extract32(insn, 5, 5); | |
1937 | unsigned nz = extract32(insn, 10, 1); | |
1938 | unsigned c = extract32(insn, 13, 3); | |
1939 | unsigned rr = extract32(insn, 16, 5); | |
1940 | unsigned rt = extract32(insn, 21, 5); | |
1941 | unsigned rs = nz ? rt : 0; | |
1942 | unsigned len = 32 - clen; | |
1943 | TCGv dest, val; | |
1944 | ||
1945 | if (c) { | |
1946 | nullify_over(ctx); | |
1947 | } | |
1948 | if (cpos + len > 32) { | |
1949 | len = 32 - cpos; | |
1950 | } | |
1951 | ||
1952 | dest = dest_gpr(ctx, rt); | |
1953 | val = load_gpr(ctx, rr); | |
1954 | if (rs == 0) { | |
1955 | tcg_gen_deposit_z_tl(dest, val, cpos, len); | |
1956 | } else { | |
1957 | tcg_gen_deposit_tl(dest, cpu_gr[rs], val, cpos, len); | |
1958 | } | |
1959 | save_gpr(ctx, rt, dest); | |
1960 | ||
1961 | /* Install the new nullification. */ | |
1962 | cond_free(&ctx->null_cond); | |
1963 | if (c) { | |
1964 | ctx->null_cond = do_sed_cond(c, dest); | |
1965 | } | |
1966 | return nullify_end(ctx, NO_EXIT); | |
1967 | } | |
1968 | ||
1969 | static ExitStatus trans_depw_sar(DisasContext *ctx, uint32_t insn, | |
1970 | const DisasInsn *di) | |
1971 | { | |
1972 | unsigned clen = extract32(insn, 0, 5); | |
1973 | unsigned nz = extract32(insn, 10, 1); | |
1974 | unsigned i = extract32(insn, 12, 1); | |
1975 | unsigned c = extract32(insn, 13, 3); | |
1976 | unsigned rt = extract32(insn, 21, 5); | |
1977 | unsigned rs = nz ? rt : 0; | |
1978 | unsigned len = 32 - clen; | |
1979 | TCGv val, mask, tmp, shift, dest; | |
1980 | unsigned msb = 1U << (len - 1); | |
1981 | ||
1982 | if (c) { | |
1983 | nullify_over(ctx); | |
1984 | } | |
1985 | ||
1986 | if (i) { | |
1987 | val = load_const(ctx, low_sextract(insn, 16, 5)); | |
1988 | } else { | |
1989 | val = load_gpr(ctx, extract32(insn, 16, 5)); | |
1990 | } | |
1991 | dest = dest_gpr(ctx, rt); | |
1992 | shift = tcg_temp_new(); | |
1993 | tmp = tcg_temp_new(); | |
1994 | ||
1995 | /* Convert big-endian bit numbering in SAR to left-shift. */ | |
1996 | tcg_gen_xori_tl(shift, cpu_sar, TARGET_LONG_BITS - 1); | |
1997 | ||
1998 | mask = tcg_const_tl(msb + (msb - 1)); | |
1999 | tcg_gen_and_tl(tmp, val, mask); | |
2000 | if (rs) { | |
2001 | tcg_gen_shl_tl(mask, mask, shift); | |
2002 | tcg_gen_shl_tl(tmp, tmp, shift); | |
2003 | tcg_gen_andc_tl(dest, cpu_gr[rs], mask); | |
2004 | tcg_gen_or_tl(dest, dest, tmp); | |
2005 | } else { | |
2006 | tcg_gen_shl_tl(dest, tmp, shift); | |
2007 | } | |
2008 | tcg_temp_free(shift); | |
2009 | tcg_temp_free(mask); | |
2010 | tcg_temp_free(tmp); | |
2011 | save_gpr(ctx, rt, dest); | |
2012 | ||
2013 | /* Install the new nullification. */ | |
2014 | cond_free(&ctx->null_cond); | |
2015 | if (c) { | |
2016 | ctx->null_cond = do_sed_cond(c, dest); | |
2017 | } | |
2018 | return nullify_end(ctx, NO_EXIT); | |
2019 | } | |
2020 | ||
2021 | static const DisasInsn table_depw[] = { | |
2022 | { 0xd4000000u, 0xfc000be0u, trans_depw_sar }, | |
2023 | { 0xd4000800u, 0xfc001800u, trans_depw_imm }, | |
2024 | { 0xd4001800u, 0xfc001800u, trans_depw_imm_c }, | |
2025 | }; | |
2026 | ||
98cd9ca7 RH |
2027 | static ExitStatus trans_be(DisasContext *ctx, uint32_t insn, bool is_l) |
2028 | { | |
2029 | unsigned n = extract32(insn, 1, 1); | |
2030 | unsigned b = extract32(insn, 21, 5); | |
2031 | target_long disp = assemble_17(insn); | |
2032 | ||
2033 | /* unsigned s = low_uextract(insn, 13, 3); */ | |
2034 | /* ??? It seems like there should be a good way of using | |
2035 | "be disp(sr2, r0)", the canonical gateway entry mechanism | |
2036 | to our advantage. But that appears to be inconvenient to | |
2037 | manage along side branch delay slots. Therefore we handle | |
2038 | entry into the gateway page via absolute address. */ | |
2039 | ||
2040 | /* Since we don't implement spaces, just branch. Do notice the special | |
2041 | case of "be disp(*,r0)" using a direct branch to disp, so that we can | |
2042 | goto_tb to the TB containing the syscall. */ | |
2043 | if (b == 0) { | |
2044 | return do_dbranch(ctx, disp, is_l ? 31 : 0, n); | |
2045 | } else { | |
2046 | TCGv tmp = get_temp(ctx); | |
2047 | tcg_gen_addi_tl(tmp, load_gpr(ctx, b), disp); | |
2048 | return do_ibranch(ctx, tmp, is_l ? 31 : 0, n); | |
2049 | } | |
2050 | } | |
2051 | ||
2052 | static ExitStatus trans_bl(DisasContext *ctx, uint32_t insn, | |
2053 | const DisasInsn *di) | |
2054 | { | |
2055 | unsigned n = extract32(insn, 1, 1); | |
2056 | unsigned link = extract32(insn, 21, 5); | |
2057 | target_long disp = assemble_17(insn); | |
2058 | ||
2059 | return do_dbranch(ctx, iaoq_dest(ctx, disp), link, n); | |
2060 | } | |
2061 | ||
2062 | static ExitStatus trans_bl_long(DisasContext *ctx, uint32_t insn, | |
2063 | const DisasInsn *di) | |
2064 | { | |
2065 | unsigned n = extract32(insn, 1, 1); | |
2066 | target_long disp = assemble_22(insn); | |
2067 | ||
2068 | return do_dbranch(ctx, iaoq_dest(ctx, disp), 2, n); | |
2069 | } | |
2070 | ||
2071 | static ExitStatus trans_blr(DisasContext *ctx, uint32_t insn, | |
2072 | const DisasInsn *di) | |
2073 | { | |
2074 | unsigned n = extract32(insn, 1, 1); | |
2075 | unsigned rx = extract32(insn, 16, 5); | |
2076 | unsigned link = extract32(insn, 21, 5); | |
2077 | TCGv tmp = get_temp(ctx); | |
2078 | ||
2079 | tcg_gen_shli_tl(tmp, load_gpr(ctx, rx), 3); | |
2080 | tcg_gen_addi_tl(tmp, tmp, ctx->iaoq_f + 8); | |
2081 | return do_ibranch(ctx, tmp, link, n); | |
2082 | } | |
2083 | ||
2084 | static ExitStatus trans_bv(DisasContext *ctx, uint32_t insn, | |
2085 | const DisasInsn *di) | |
2086 | { | |
2087 | unsigned n = extract32(insn, 1, 1); | |
2088 | unsigned rx = extract32(insn, 16, 5); | |
2089 | unsigned rb = extract32(insn, 21, 5); | |
2090 | TCGv dest; | |
2091 | ||
2092 | if (rx == 0) { | |
2093 | dest = load_gpr(ctx, rb); | |
2094 | } else { | |
2095 | dest = get_temp(ctx); | |
2096 | tcg_gen_shli_tl(dest, load_gpr(ctx, rx), 3); | |
2097 | tcg_gen_add_tl(dest, dest, load_gpr(ctx, rb)); | |
2098 | } | |
2099 | return do_ibranch(ctx, dest, 0, n); | |
2100 | } | |
2101 | ||
2102 | static ExitStatus trans_bve(DisasContext *ctx, uint32_t insn, | |
2103 | const DisasInsn *di) | |
2104 | { | |
2105 | unsigned n = extract32(insn, 1, 1); | |
2106 | unsigned rb = extract32(insn, 21, 5); | |
2107 | unsigned link = extract32(insn, 13, 1) ? 2 : 0; | |
2108 | ||
2109 | return do_ibranch(ctx, load_gpr(ctx, rb), link, n); | |
2110 | } | |
2111 | ||
2112 | static const DisasInsn table_branch[] = { | |
2113 | { 0xe8000000u, 0xfc006000u, trans_bl }, /* B,L and B,L,PUSH */ | |
2114 | { 0xe800a000u, 0xfc00e000u, trans_bl_long }, | |
2115 | { 0xe8004000u, 0xfc00fffdu, trans_blr }, | |
2116 | { 0xe800c000u, 0xfc00fffdu, trans_bv }, | |
2117 | { 0xe800d000u, 0xfc00dffcu, trans_bve }, | |
2118 | }; | |
2119 | ||
61766fe9 RH |
2120 | static ExitStatus translate_table_int(DisasContext *ctx, uint32_t insn, |
2121 | const DisasInsn table[], size_t n) | |
2122 | { | |
2123 | size_t i; | |
2124 | for (i = 0; i < n; ++i) { | |
2125 | if ((insn & table[i].mask) == table[i].insn) { | |
2126 | return table[i].trans(ctx, insn, &table[i]); | |
2127 | } | |
2128 | } | |
2129 | return gen_illegal(ctx); | |
2130 | } | |
2131 | ||
2132 | #define translate_table(ctx, insn, table) \ | |
2133 | translate_table_int(ctx, insn, table, ARRAY_SIZE(table)) | |
2134 | ||
2135 | static ExitStatus translate_one(DisasContext *ctx, uint32_t insn) | |
2136 | { | |
2137 | uint32_t opc = extract32(insn, 26, 6); | |
2138 | ||
2139 | switch (opc) { | |
b2167459 RH |
2140 | case 0x02: |
2141 | return translate_table(ctx, insn, table_arith_log); | |
2142 | case 0x08: | |
2143 | return trans_ldil(ctx, insn); | |
2144 | case 0x0A: | |
2145 | return trans_addil(ctx, insn); | |
2146 | case 0x0D: | |
2147 | return trans_ldo(ctx, insn); | |
98cd9ca7 RH |
2148 | case 0x20: |
2149 | return trans_cmpb(ctx, insn, true, false, false); | |
2150 | case 0x21: | |
2151 | return trans_cmpb(ctx, insn, true, true, false); | |
2152 | case 0x22: | |
2153 | return trans_cmpb(ctx, insn, false, false, false); | |
2154 | case 0x23: | |
2155 | return trans_cmpb(ctx, insn, false, true, false); | |
b2167459 RH |
2156 | case 0x24: |
2157 | return trans_cmpiclr(ctx, insn); | |
2158 | case 0x25: | |
2159 | return trans_subi(ctx, insn); | |
98cd9ca7 RH |
2160 | case 0x27: |
2161 | return trans_cmpb(ctx, insn, true, false, true); | |
2162 | case 0x28: | |
2163 | return trans_addb(ctx, insn, true, false); | |
2164 | case 0x29: | |
2165 | return trans_addb(ctx, insn, true, true); | |
2166 | case 0x2A: | |
2167 | return trans_addb(ctx, insn, false, false); | |
2168 | case 0x2B: | |
2169 | return trans_addb(ctx, insn, false, true); | |
b2167459 RH |
2170 | case 0x2C: |
2171 | case 0x2D: | |
2172 | return trans_addi(ctx, insn); | |
98cd9ca7 RH |
2173 | case 0x2F: |
2174 | return trans_cmpb(ctx, insn, false, false, true); | |
2175 | case 0x30: | |
2176 | case 0x31: | |
2177 | return trans_bb(ctx, insn); | |
2178 | case 0x32: | |
2179 | return trans_movb(ctx, insn, false); | |
2180 | case 0x33: | |
2181 | return trans_movb(ctx, insn, true); | |
0b1347d2 RH |
2182 | case 0x34: |
2183 | return translate_table(ctx, insn, table_sh_ex); | |
2184 | case 0x35: | |
2185 | return translate_table(ctx, insn, table_depw); | |
98cd9ca7 RH |
2186 | case 0x38: |
2187 | return trans_be(ctx, insn, false); | |
2188 | case 0x39: | |
2189 | return trans_be(ctx, insn, true); | |
2190 | case 0x3A: | |
2191 | return translate_table(ctx, insn, table_branch); | |
61766fe9 RH |
2192 | default: |
2193 | break; | |
2194 | } | |
2195 | return gen_illegal(ctx); | |
2196 | } | |
2197 | ||
2198 | void gen_intermediate_code(CPUHPPAState *env, struct TranslationBlock *tb) | |
2199 | { | |
2200 | HPPACPU *cpu = hppa_env_get_cpu(env); | |
2201 | CPUState *cs = CPU(cpu); | |
2202 | DisasContext ctx; | |
2203 | ExitStatus ret; | |
2204 | int num_insns, max_insns, i; | |
2205 | ||
2206 | ctx.tb = tb; | |
2207 | ctx.cs = cs; | |
2208 | ctx.iaoq_f = tb->pc; | |
2209 | ctx.iaoq_b = tb->cs_base; | |
2210 | ctx.singlestep_enabled = cs->singlestep_enabled; | |
2211 | ||
2212 | ctx.ntemps = 0; | |
2213 | for (i = 0; i < ARRAY_SIZE(ctx.temps); ++i) { | |
2214 | TCGV_UNUSED(ctx.temps[i]); | |
2215 | } | |
2216 | ||
2217 | /* Compute the maximum number of insns to execute, as bounded by | |
2218 | (1) icount, (2) single-stepping, (3) branch delay slots, or | |
2219 | (4) the number of insns remaining on the current page. */ | |
2220 | max_insns = tb->cflags & CF_COUNT_MASK; | |
2221 | if (max_insns == 0) { | |
2222 | max_insns = CF_COUNT_MASK; | |
2223 | } | |
2224 | if (ctx.singlestep_enabled || singlestep) { | |
2225 | max_insns = 1; | |
2226 | } else if (max_insns > TCG_MAX_INSNS) { | |
2227 | max_insns = TCG_MAX_INSNS; | |
2228 | } | |
2229 | ||
2230 | num_insns = 0; | |
2231 | gen_tb_start(tb); | |
2232 | ||
129e9cc3 RH |
2233 | /* Seed the nullification status from PSW[N], as shown in TB->FLAGS. */ |
2234 | ctx.null_cond = cond_make_f(); | |
2235 | ctx.psw_n_nonzero = false; | |
2236 | if (tb->flags & 1) { | |
2237 | ctx.null_cond.c = TCG_COND_ALWAYS; | |
2238 | ctx.psw_n_nonzero = true; | |
2239 | } | |
2240 | ctx.null_lab = NULL; | |
2241 | ||
61766fe9 RH |
2242 | do { |
2243 | tcg_gen_insn_start(ctx.iaoq_f, ctx.iaoq_b); | |
2244 | num_insns++; | |
2245 | ||
2246 | if (unlikely(cpu_breakpoint_test(cs, ctx.iaoq_f, BP_ANY))) { | |
2247 | ret = gen_excp(&ctx, EXCP_DEBUG); | |
2248 | break; | |
2249 | } | |
2250 | if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) { | |
2251 | gen_io_start(); | |
2252 | } | |
2253 | ||
7ad439df RH |
2254 | if (ctx.iaoq_f < TARGET_PAGE_SIZE) { |
2255 | ret = do_page_zero(&ctx); | |
2256 | assert(ret != NO_EXIT); | |
2257 | } else { | |
61766fe9 RH |
2258 | /* Always fetch the insn, even if nullified, so that we check |
2259 | the page permissions for execute. */ | |
2260 | uint32_t insn = cpu_ldl_code(env, ctx.iaoq_f); | |
2261 | ||
2262 | /* Set up the IA queue for the next insn. | |
2263 | This will be overwritten by a branch. */ | |
2264 | if (ctx.iaoq_b == -1) { | |
2265 | ctx.iaoq_n = -1; | |
2266 | ctx.iaoq_n_var = get_temp(&ctx); | |
2267 | tcg_gen_addi_tl(ctx.iaoq_n_var, cpu_iaoq_b, 4); | |
2268 | } else { | |
2269 | ctx.iaoq_n = ctx.iaoq_b + 4; | |
2270 | TCGV_UNUSED(ctx.iaoq_n_var); | |
2271 | } | |
2272 | ||
129e9cc3 RH |
2273 | if (unlikely(ctx.null_cond.c == TCG_COND_ALWAYS)) { |
2274 | ctx.null_cond.c = TCG_COND_NEVER; | |
2275 | ret = NO_EXIT; | |
2276 | } else { | |
2277 | ret = translate_one(&ctx, insn); | |
2278 | assert(ctx.null_lab == NULL); | |
2279 | } | |
61766fe9 RH |
2280 | } |
2281 | ||
2282 | for (i = 0; i < ctx.ntemps; ++i) { | |
2283 | tcg_temp_free(ctx.temps[i]); | |
2284 | TCGV_UNUSED(ctx.temps[i]); | |
2285 | } | |
2286 | ctx.ntemps = 0; | |
2287 | ||
2288 | /* If we see non-linear instructions, exhaust instruction count, | |
2289 | or run out of buffer space, stop generation. */ | |
2290 | /* ??? The non-linear instruction restriction is purely due to | |
2291 | the debugging dump. Otherwise we *could* follow unconditional | |
2292 | branches within the same page. */ | |
2293 | if (ret == NO_EXIT | |
2294 | && (ctx.iaoq_b != ctx.iaoq_f + 4 | |
2295 | || num_insns >= max_insns | |
2296 | || tcg_op_buf_full())) { | |
129e9cc3 RH |
2297 | if (ctx.null_cond.c == TCG_COND_NEVER |
2298 | || ctx.null_cond.c == TCG_COND_ALWAYS) { | |
2299 | nullify_set(&ctx, ctx.null_cond.c == TCG_COND_ALWAYS); | |
2300 | gen_goto_tb(&ctx, 0, ctx.iaoq_b, ctx.iaoq_n); | |
2301 | ret = EXIT_GOTO_TB; | |
2302 | } else { | |
2303 | ret = EXIT_IAQ_N_STALE; | |
2304 | } | |
61766fe9 RH |
2305 | } |
2306 | ||
2307 | ctx.iaoq_f = ctx.iaoq_b; | |
2308 | ctx.iaoq_b = ctx.iaoq_n; | |
2309 | if (ret == EXIT_NORETURN | |
2310 | || ret == EXIT_GOTO_TB | |
2311 | || ret == EXIT_IAQ_N_UPDATED) { | |
2312 | break; | |
2313 | } | |
2314 | if (ctx.iaoq_f == -1) { | |
2315 | tcg_gen_mov_tl(cpu_iaoq_f, cpu_iaoq_b); | |
2316 | copy_iaoq_entry(cpu_iaoq_b, ctx.iaoq_n, ctx.iaoq_n_var); | |
129e9cc3 | 2317 | nullify_save(&ctx); |
61766fe9 RH |
2318 | ret = EXIT_IAQ_N_UPDATED; |
2319 | break; | |
2320 | } | |
2321 | if (ctx.iaoq_b == -1) { | |
2322 | tcg_gen_mov_tl(cpu_iaoq_b, ctx.iaoq_n_var); | |
2323 | } | |
2324 | } while (ret == NO_EXIT); | |
2325 | ||
2326 | if (tb->cflags & CF_LAST_IO) { | |
2327 | gen_io_end(); | |
2328 | } | |
2329 | ||
2330 | switch (ret) { | |
2331 | case EXIT_GOTO_TB: | |
2332 | case EXIT_NORETURN: | |
2333 | break; | |
2334 | case EXIT_IAQ_N_STALE: | |
2335 | copy_iaoq_entry(cpu_iaoq_f, ctx.iaoq_f, cpu_iaoq_f); | |
2336 | copy_iaoq_entry(cpu_iaoq_b, ctx.iaoq_b, cpu_iaoq_b); | |
129e9cc3 | 2337 | nullify_save(&ctx); |
61766fe9 RH |
2338 | /* FALLTHRU */ |
2339 | case EXIT_IAQ_N_UPDATED: | |
2340 | if (ctx.singlestep_enabled) { | |
2341 | gen_excp_1(EXCP_DEBUG); | |
2342 | } else { | |
2343 | tcg_gen_exit_tb(0); | |
2344 | } | |
2345 | break; | |
2346 | default: | |
2347 | abort(); | |
2348 | } | |
2349 | ||
2350 | gen_tb_end(tb, num_insns); | |
2351 | ||
2352 | tb->size = num_insns * 4; | |
2353 | tb->icount = num_insns; | |
2354 | ||
2355 | #ifdef DEBUG_DISAS | |
2356 | if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM) | |
2357 | && qemu_log_in_addr_range(tb->pc)) { | |
2358 | qemu_log_lock(); | |
7ad439df RH |
2359 | switch (tb->pc) { |
2360 | case 0x00: | |
2361 | qemu_log("IN:\n0x00000000: (null)\n\n"); | |
2362 | break; | |
2363 | case 0xb0: | |
2364 | qemu_log("IN:\n0x000000b0: light-weight-syscall\n\n"); | |
2365 | break; | |
2366 | case 0xe0: | |
2367 | qemu_log("IN:\n0x000000e0: set-thread-pointer-syscall\n\n"); | |
2368 | break; | |
2369 | case 0x100: | |
2370 | qemu_log("IN:\n0x00000100: syscall\n\n"); | |
2371 | break; | |
2372 | default: | |
2373 | qemu_log("IN: %s\n", lookup_symbol(tb->pc)); | |
2374 | log_target_disas(cs, tb->pc, tb->size, 1); | |
2375 | qemu_log("\n"); | |
2376 | break; | |
2377 | } | |
61766fe9 RH |
2378 | qemu_log_unlock(); |
2379 | } | |
2380 | #endif | |
2381 | } | |
2382 | ||
2383 | void restore_state_to_opc(CPUHPPAState *env, TranslationBlock *tb, | |
2384 | target_ulong *data) | |
2385 | { | |
2386 | env->iaoq_f = data[0]; | |
2387 | if (data[1] != -1) { | |
2388 | env->iaoq_b = data[1]; | |
2389 | } | |
2390 | /* Since we were executing the instruction at IAOQ_F, and took some | |
2391 | sort of action that provoked the cpu_restore_state, we can infer | |
2392 | that the instruction was not nullified. */ | |
2393 | env->psw_n = 0; | |
2394 | } |