2 * LatticeMico32 main translation routines.
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.
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.
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/>.
21 #include "disas/disas.h"
25 #include "hw/lm32/lm32_pic.h"
32 # define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__)
34 # define LOG_DIS(...) do { } while (0)
37 #define EXTRACT_FIELD(src, start, end) \
38 (((src) >> start) & ((1 << (end - start + 1)) - 1))
42 static TCGv_ptr cpu_env;
43 static TCGv cpu_R[32];
53 static TCGv cpu_bp[4];
54 static TCGv cpu_wp[4];
56 #include "exec/gen-icount.h"
65 /* This is the state at translation time. */
66 typedef struct DisasContext {
74 uint8_t r0, r1, r2, csr;
79 unsigned int delayed_branch;
80 unsigned int tb_flags, synced_flags; /* tb dependent flags. */
84 struct TranslationBlock *tb;
85 int singlestep_enabled;
88 static const char *regnames[] = {
89 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
90 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
91 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
92 "r24", "r25", "r26/gp", "r27/fp", "r28/sp", "r29/ra",
93 "r30/ea", "r31/ba", "bp0", "bp1", "bp2", "bp3", "wp0",
97 static inline int zero_extend(unsigned int val, int width)
99 return val & ((1 << width) - 1);
102 static inline int sign_extend(unsigned int val, int width)
115 static inline void t_gen_raise_exception(DisasContext *dc, uint32_t index)
117 TCGv_i32 tmp = tcg_const_i32(index);
119 gen_helper_raise_exception(cpu_env, tmp);
120 tcg_temp_free_i32(tmp);
123 static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
125 TranslationBlock *tb;
128 if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) &&
129 likely(!dc->singlestep_enabled)) {
131 tcg_gen_movi_tl(cpu_pc, dest);
132 tcg_gen_exit_tb((tcg_target_long)tb + n);
134 tcg_gen_movi_tl(cpu_pc, dest);
135 if (dc->singlestep_enabled) {
136 t_gen_raise_exception(dc, EXCP_DEBUG);
142 static void dec_add(DisasContext *dc)
144 if (dc->format == OP_FMT_RI) {
145 if (dc->r0 == R_R0) {
146 if (dc->r1 == R_R0 && dc->imm16 == 0) {
149 LOG_DIS("mvi r%d, %d\n", dc->r1, sign_extend(dc->imm16, 16));
152 LOG_DIS("addi r%d, r%d, %d\n", dc->r1, dc->r0,
153 sign_extend(dc->imm16, 16));
156 LOG_DIS("add r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
159 if (dc->format == OP_FMT_RI) {
160 tcg_gen_addi_tl(cpu_R[dc->r1], cpu_R[dc->r0],
161 sign_extend(dc->imm16, 16));
163 tcg_gen_add_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
167 static void dec_and(DisasContext *dc)
169 if (dc->format == OP_FMT_RI) {
170 LOG_DIS("andi r%d, r%d, %d\n", dc->r1, dc->r0,
171 zero_extend(dc->imm16, 16));
173 LOG_DIS("and r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
176 if (dc->format == OP_FMT_RI) {
177 tcg_gen_andi_tl(cpu_R[dc->r1], cpu_R[dc->r0],
178 zero_extend(dc->imm16, 16));
180 if (dc->r0 == 0 && dc->r1 == 0 && dc->r2 == 0) {
181 tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
182 gen_helper_hlt(cpu_env);
184 tcg_gen_and_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
189 static void dec_andhi(DisasContext *dc)
191 LOG_DIS("andhi r%d, r%d, %d\n", dc->r2, dc->r0, dc->imm16);
193 tcg_gen_andi_tl(cpu_R[dc->r1], cpu_R[dc->r0], (dc->imm16 << 16));
196 static void dec_b(DisasContext *dc)
198 if (dc->r0 == R_RA) {
200 } else if (dc->r0 == R_EA) {
202 } else if (dc->r0 == R_BA) {
205 LOG_DIS("b r%d\n", dc->r0);
208 /* restore IE.IE in case of an eret */
209 if (dc->r0 == R_EA) {
210 TCGv t0 = tcg_temp_new();
211 int l1 = gen_new_label();
212 tcg_gen_andi_tl(t0, cpu_ie, IE_EIE);
213 tcg_gen_ori_tl(cpu_ie, cpu_ie, IE_IE);
214 tcg_gen_brcondi_tl(TCG_COND_EQ, t0, IE_EIE, l1);
215 tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_IE);
218 } else if (dc->r0 == R_BA) {
219 TCGv t0 = tcg_temp_new();
220 int l1 = gen_new_label();
221 tcg_gen_andi_tl(t0, cpu_ie, IE_BIE);
222 tcg_gen_ori_tl(cpu_ie, cpu_ie, IE_IE);
223 tcg_gen_brcondi_tl(TCG_COND_EQ, t0, IE_BIE, l1);
224 tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_IE);
228 tcg_gen_mov_tl(cpu_pc, cpu_R[dc->r0]);
230 dc->is_jmp = DISAS_JUMP;
233 static void dec_bi(DisasContext *dc)
235 LOG_DIS("bi %d\n", sign_extend(dc->imm26 << 2, 26));
237 gen_goto_tb(dc, 0, dc->pc + (sign_extend(dc->imm26 << 2, 26)));
239 dc->is_jmp = DISAS_TB_JUMP;
242 static inline void gen_cond_branch(DisasContext *dc, int cond)
246 l1 = gen_new_label();
247 tcg_gen_brcond_tl(cond, cpu_R[dc->r0], cpu_R[dc->r1], l1);
248 gen_goto_tb(dc, 0, dc->pc + 4);
250 gen_goto_tb(dc, 1, dc->pc + (sign_extend(dc->imm16 << 2, 16)));
251 dc->is_jmp = DISAS_TB_JUMP;
254 static void dec_be(DisasContext *dc)
256 LOG_DIS("be r%d, r%d, %d\n", dc->r0, dc->r1,
257 sign_extend(dc->imm16, 16) * 4);
259 gen_cond_branch(dc, TCG_COND_EQ);
262 static void dec_bg(DisasContext *dc)
264 LOG_DIS("bg r%d, r%d, %d\n", dc->r0, dc->r1,
265 sign_extend(dc->imm16, 16 * 4));
267 gen_cond_branch(dc, TCG_COND_GT);
270 static void dec_bge(DisasContext *dc)
272 LOG_DIS("bge r%d, r%d, %d\n", dc->r0, dc->r1,
273 sign_extend(dc->imm16, 16) * 4);
275 gen_cond_branch(dc, TCG_COND_GE);
278 static void dec_bgeu(DisasContext *dc)
280 LOG_DIS("bgeu r%d, r%d, %d\n", dc->r0, dc->r1,
281 sign_extend(dc->imm16, 16) * 4);
283 gen_cond_branch(dc, TCG_COND_GEU);
286 static void dec_bgu(DisasContext *dc)
288 LOG_DIS("bgu r%d, r%d, %d\n", dc->r0, dc->r1,
289 sign_extend(dc->imm16, 16) * 4);
291 gen_cond_branch(dc, TCG_COND_GTU);
294 static void dec_bne(DisasContext *dc)
296 LOG_DIS("bne r%d, r%d, %d\n", dc->r0, dc->r1,
297 sign_extend(dc->imm16, 16) * 4);
299 gen_cond_branch(dc, TCG_COND_NE);
302 static void dec_call(DisasContext *dc)
304 LOG_DIS("call r%d\n", dc->r0);
306 tcg_gen_movi_tl(cpu_R[R_RA], dc->pc + 4);
307 tcg_gen_mov_tl(cpu_pc, cpu_R[dc->r0]);
309 dc->is_jmp = DISAS_JUMP;
312 static void dec_calli(DisasContext *dc)
314 LOG_DIS("calli %d\n", sign_extend(dc->imm26, 26) * 4);
316 tcg_gen_movi_tl(cpu_R[R_RA], dc->pc + 4);
317 gen_goto_tb(dc, 0, dc->pc + (sign_extend(dc->imm26 << 2, 26)));
319 dc->is_jmp = DISAS_TB_JUMP;
322 static inline void gen_compare(DisasContext *dc, int cond)
324 int rX = (dc->format == OP_FMT_RR) ? dc->r2 : dc->r1;
325 int rY = (dc->format == OP_FMT_RR) ? dc->r0 : dc->r0;
326 int rZ = (dc->format == OP_FMT_RR) ? dc->r1 : -1;
329 if (dc->format == OP_FMT_RI) {
333 i = zero_extend(dc->imm16, 16);
336 i = sign_extend(dc->imm16, 16);
340 tcg_gen_setcondi_tl(cond, cpu_R[rX], cpu_R[rY], i);
342 tcg_gen_setcond_tl(cond, cpu_R[rX], cpu_R[rY], cpu_R[rZ]);
346 static void dec_cmpe(DisasContext *dc)
348 if (dc->format == OP_FMT_RI) {
349 LOG_DIS("cmpei r%d, r%d, %d\n", dc->r0, dc->r1,
350 sign_extend(dc->imm16, 16));
352 LOG_DIS("cmpe r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
355 gen_compare(dc, TCG_COND_EQ);
358 static void dec_cmpg(DisasContext *dc)
360 if (dc->format == OP_FMT_RI) {
361 LOG_DIS("cmpgi r%d, r%d, %d\n", dc->r0, dc->r1,
362 sign_extend(dc->imm16, 16));
364 LOG_DIS("cmpg r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
367 gen_compare(dc, TCG_COND_GT);
370 static void dec_cmpge(DisasContext *dc)
372 if (dc->format == OP_FMT_RI) {
373 LOG_DIS("cmpgei r%d, r%d, %d\n", dc->r0, dc->r1,
374 sign_extend(dc->imm16, 16));
376 LOG_DIS("cmpge r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
379 gen_compare(dc, TCG_COND_GE);
382 static void dec_cmpgeu(DisasContext *dc)
384 if (dc->format == OP_FMT_RI) {
385 LOG_DIS("cmpgeui r%d, r%d, %d\n", dc->r0, dc->r1,
386 zero_extend(dc->imm16, 16));
388 LOG_DIS("cmpgeu r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
391 gen_compare(dc, TCG_COND_GEU);
394 static void dec_cmpgu(DisasContext *dc)
396 if (dc->format == OP_FMT_RI) {
397 LOG_DIS("cmpgui r%d, r%d, %d\n", dc->r0, dc->r1,
398 zero_extend(dc->imm16, 16));
400 LOG_DIS("cmpgu r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
403 gen_compare(dc, TCG_COND_GTU);
406 static void dec_cmpne(DisasContext *dc)
408 if (dc->format == OP_FMT_RI) {
409 LOG_DIS("cmpnei r%d, r%d, %d\n", dc->r0, dc->r1,
410 sign_extend(dc->imm16, 16));
412 LOG_DIS("cmpne r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
415 gen_compare(dc, TCG_COND_NE);
418 static void dec_divu(DisasContext *dc)
422 LOG_DIS("divu r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
424 if (!(dc->env->features & LM32_FEATURE_DIVIDE)) {
425 cpu_abort(dc->env, "hardware divider is not available\n");
428 l1 = gen_new_label();
429 tcg_gen_brcondi_tl(TCG_COND_NE, cpu_R[dc->r1], 0, l1);
430 tcg_gen_movi_tl(cpu_pc, dc->pc);
431 t_gen_raise_exception(dc, EXCP_DIVIDE_BY_ZERO);
433 tcg_gen_divu_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
436 static void dec_lb(DisasContext *dc)
440 LOG_DIS("lb r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
443 tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
444 tcg_gen_qemu_ld8s(cpu_R[dc->r1], t0, MEM_INDEX);
448 static void dec_lbu(DisasContext *dc)
452 LOG_DIS("lbu r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
455 tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
456 tcg_gen_qemu_ld8u(cpu_R[dc->r1], t0, MEM_INDEX);
460 static void dec_lh(DisasContext *dc)
464 LOG_DIS("lh r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
467 tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
468 tcg_gen_qemu_ld16s(cpu_R[dc->r1], t0, MEM_INDEX);
472 static void dec_lhu(DisasContext *dc)
476 LOG_DIS("lhu r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
479 tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
480 tcg_gen_qemu_ld16u(cpu_R[dc->r1], t0, MEM_INDEX);
484 static void dec_lw(DisasContext *dc)
488 LOG_DIS("lw r%d, (r%d+%d)\n", dc->r1, dc->r0, sign_extend(dc->imm16, 16));
491 tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
492 tcg_gen_qemu_ld32s(cpu_R[dc->r1], t0, MEM_INDEX);
496 static void dec_modu(DisasContext *dc)
500 LOG_DIS("modu r%d, r%d, %d\n", dc->r2, dc->r0, dc->r1);
502 if (!(dc->env->features & LM32_FEATURE_DIVIDE)) {
503 cpu_abort(dc->env, "hardware divider is not available\n");
506 l1 = gen_new_label();
507 tcg_gen_brcondi_tl(TCG_COND_NE, cpu_R[dc->r1], 0, l1);
508 tcg_gen_movi_tl(cpu_pc, dc->pc);
509 t_gen_raise_exception(dc, EXCP_DIVIDE_BY_ZERO);
511 tcg_gen_remu_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
514 static void dec_mul(DisasContext *dc)
516 if (dc->format == OP_FMT_RI) {
517 LOG_DIS("muli r%d, r%d, %d\n", dc->r0, dc->r1,
518 sign_extend(dc->imm16, 16));
520 LOG_DIS("mul r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
523 if (!(dc->env->features & LM32_FEATURE_MULTIPLY)) {
524 cpu_abort(dc->env, "hardware multiplier is not available\n");
527 if (dc->format == OP_FMT_RI) {
528 tcg_gen_muli_tl(cpu_R[dc->r1], cpu_R[dc->r0],
529 sign_extend(dc->imm16, 16));
531 tcg_gen_mul_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
535 static void dec_nor(DisasContext *dc)
537 if (dc->format == OP_FMT_RI) {
538 LOG_DIS("nori r%d, r%d, %d\n", dc->r0, dc->r1,
539 zero_extend(dc->imm16, 16));
541 LOG_DIS("nor r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
544 if (dc->format == OP_FMT_RI) {
545 TCGv t0 = tcg_temp_new();
546 tcg_gen_movi_tl(t0, zero_extend(dc->imm16, 16));
547 tcg_gen_nor_tl(cpu_R[dc->r1], cpu_R[dc->r0], t0);
550 tcg_gen_nor_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
554 static void dec_or(DisasContext *dc)
556 if (dc->format == OP_FMT_RI) {
557 LOG_DIS("ori r%d, r%d, %d\n", dc->r1, dc->r0,
558 zero_extend(dc->imm16, 16));
560 if (dc->r1 == R_R0) {
561 LOG_DIS("mv r%d, r%d\n", dc->r2, dc->r0);
563 LOG_DIS("or r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
567 if (dc->format == OP_FMT_RI) {
568 tcg_gen_ori_tl(cpu_R[dc->r1], cpu_R[dc->r0],
569 zero_extend(dc->imm16, 16));
571 tcg_gen_or_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
575 static void dec_orhi(DisasContext *dc)
577 if (dc->r0 == R_R0) {
578 LOG_DIS("mvhi r%d, %d\n", dc->r1, dc->imm16);
580 LOG_DIS("orhi r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm16);
583 tcg_gen_ori_tl(cpu_R[dc->r1], cpu_R[dc->r0], (dc->imm16 << 16));
586 static void dec_scall(DisasContext *dc)
590 } else if (dc->imm5 == 2) {
593 cpu_abort(dc->env, "invalid opcode\n");
597 tcg_gen_movi_tl(cpu_pc, dc->pc);
598 t_gen_raise_exception(dc, EXCP_SYSTEMCALL);
600 tcg_gen_movi_tl(cpu_pc, dc->pc);
601 t_gen_raise_exception(dc, EXCP_BREAKPOINT);
605 static void dec_rcsr(DisasContext *dc)
607 LOG_DIS("rcsr r%d, %d\n", dc->r2, dc->csr);
611 tcg_gen_mov_tl(cpu_R[dc->r2], cpu_ie);
614 gen_helper_rcsr_im(cpu_R[dc->r2], cpu_env);
617 gen_helper_rcsr_ip(cpu_R[dc->r2], cpu_env);
620 tcg_gen_mov_tl(cpu_R[dc->r2], cpu_cc);
623 tcg_gen_mov_tl(cpu_R[dc->r2], cpu_cfg);
626 tcg_gen_mov_tl(cpu_R[dc->r2], cpu_eba);
629 tcg_gen_mov_tl(cpu_R[dc->r2], cpu_dc);
632 tcg_gen_mov_tl(cpu_R[dc->r2], cpu_deba);
635 gen_helper_rcsr_jtx(cpu_R[dc->r2], cpu_env);
638 gen_helper_rcsr_jrx(cpu_R[dc->r2], cpu_env);
650 cpu_abort(dc->env, "invalid read access csr=%x\n", dc->csr);
653 cpu_abort(dc->env, "read_csr: unknown csr=%x\n", dc->csr);
658 static void dec_sb(DisasContext *dc)
662 LOG_DIS("sb (r%d+%d), r%d\n", dc->r0, dc->imm16, dc->r1);
665 tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
666 tcg_gen_qemu_st8(cpu_R[dc->r1], t0, MEM_INDEX);
670 static void dec_sextb(DisasContext *dc)
672 LOG_DIS("sextb r%d, r%d\n", dc->r2, dc->r0);
674 if (!(dc->env->features & LM32_FEATURE_SIGN_EXTEND)) {
675 cpu_abort(dc->env, "hardware sign extender is not available\n");
678 tcg_gen_ext8s_tl(cpu_R[dc->r2], cpu_R[dc->r0]);
681 static void dec_sexth(DisasContext *dc)
683 LOG_DIS("sexth r%d, r%d\n", dc->r2, dc->r0);
685 if (!(dc->env->features & LM32_FEATURE_SIGN_EXTEND)) {
686 cpu_abort(dc->env, "hardware sign extender is not available\n");
689 tcg_gen_ext16s_tl(cpu_R[dc->r2], cpu_R[dc->r0]);
692 static void dec_sh(DisasContext *dc)
696 LOG_DIS("sh (r%d+%d), r%d\n", dc->r0, dc->imm16, dc->r1);
699 tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
700 tcg_gen_qemu_st16(cpu_R[dc->r1], t0, MEM_INDEX);
704 static void dec_sl(DisasContext *dc)
706 if (dc->format == OP_FMT_RI) {
707 LOG_DIS("sli r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm5);
709 LOG_DIS("sl r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
712 if (!(dc->env->features & LM32_FEATURE_SHIFT)) {
713 cpu_abort(dc->env, "hardware shifter is not available\n");
716 if (dc->format == OP_FMT_RI) {
717 tcg_gen_shli_tl(cpu_R[dc->r1], cpu_R[dc->r0], dc->imm5);
719 TCGv t0 = tcg_temp_new();
720 tcg_gen_andi_tl(t0, cpu_R[dc->r1], 0x1f);
721 tcg_gen_shl_tl(cpu_R[dc->r2], cpu_R[dc->r0], t0);
726 static void dec_sr(DisasContext *dc)
728 if (dc->format == OP_FMT_RI) {
729 LOG_DIS("sri r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm5);
731 LOG_DIS("sr r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
734 if (!(dc->env->features & LM32_FEATURE_SHIFT)) {
735 if (dc->format == OP_FMT_RI) {
736 /* TODO: check r1 == 1 during runtime */
739 cpu_abort(dc->env, "hardware shifter is not available\n");
744 if (dc->format == OP_FMT_RI) {
745 tcg_gen_sari_tl(cpu_R[dc->r1], cpu_R[dc->r0], dc->imm5);
747 TCGv t0 = tcg_temp_new();
748 tcg_gen_andi_tl(t0, cpu_R[dc->r1], 0x1f);
749 tcg_gen_sar_tl(cpu_R[dc->r2], cpu_R[dc->r0], t0);
754 static void dec_sru(DisasContext *dc)
756 if (dc->format == OP_FMT_RI) {
757 LOG_DIS("srui r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm5);
759 LOG_DIS("sru r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
762 if (!(dc->env->features & LM32_FEATURE_SHIFT)) {
763 if (dc->format == OP_FMT_RI) {
764 /* TODO: check r1 == 1 during runtime */
767 cpu_abort(dc->env, "hardware shifter is not available\n");
772 if (dc->format == OP_FMT_RI) {
773 tcg_gen_shri_tl(cpu_R[dc->r1], cpu_R[dc->r0], dc->imm5);
775 TCGv t0 = tcg_temp_new();
776 tcg_gen_andi_tl(t0, cpu_R[dc->r1], 0x1f);
777 tcg_gen_shr_tl(cpu_R[dc->r2], cpu_R[dc->r0], t0);
782 static void dec_sub(DisasContext *dc)
784 LOG_DIS("sub r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
786 tcg_gen_sub_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
789 static void dec_sw(DisasContext *dc)
793 LOG_DIS("sw (r%d+%d), r%d\n", dc->r0, sign_extend(dc->imm16, 16), dc->r1);
796 tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
797 tcg_gen_qemu_st32(cpu_R[dc->r1], t0, MEM_INDEX);
801 static void dec_user(DisasContext *dc)
805 cpu_abort(dc->env, "user insn undefined\n");
808 static void dec_wcsr(DisasContext *dc)
812 LOG_DIS("wcsr r%d, %d\n", dc->r1, dc->csr);
816 tcg_gen_mov_tl(cpu_ie, cpu_R[dc->r1]);
817 tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
818 dc->is_jmp = DISAS_UPDATE;
821 /* mark as an io operation because it could cause an interrupt */
825 gen_helper_wcsr_im(cpu_env, cpu_R[dc->r1]);
826 tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
830 dc->is_jmp = DISAS_UPDATE;
833 /* mark as an io operation because it could cause an interrupt */
837 gen_helper_wcsr_ip(cpu_env, cpu_R[dc->r1]);
838 tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
842 dc->is_jmp = DISAS_UPDATE;
851 tcg_gen_mov_tl(cpu_eba, cpu_R[dc->r1]);
854 tcg_gen_mov_tl(cpu_deba, cpu_R[dc->r1]);
857 gen_helper_wcsr_jtx(cpu_env, cpu_R[dc->r1]);
860 gen_helper_wcsr_jrx(cpu_env, cpu_R[dc->r1]);
863 tcg_gen_mov_tl(cpu_dc, cpu_R[dc->r1]);
869 no = dc->csr - CSR_BP0;
870 if (dc->env->num_bps <= no) {
871 cpu_abort(dc->env, "breakpoint #%i is not available\n", no);
873 tcg_gen_mov_tl(cpu_bp[no], cpu_R[dc->r1]);
879 no = dc->csr - CSR_WP0;
880 if (dc->env->num_wps <= no) {
881 cpu_abort(dc->env, "watchpoint #%i is not available\n", no);
883 tcg_gen_mov_tl(cpu_wp[no], cpu_R[dc->r1]);
887 cpu_abort(dc->env, "invalid write access csr=%x\n", dc->csr);
890 cpu_abort(dc->env, "write_csr unknown csr=%x\n", dc->csr);
895 static void dec_xnor(DisasContext *dc)
897 if (dc->format == OP_FMT_RI) {
898 LOG_DIS("xnori r%d, r%d, %d\n", dc->r0, dc->r1,
899 zero_extend(dc->imm16, 16));
901 if (dc->r1 == R_R0) {
902 LOG_DIS("not r%d, r%d\n", dc->r2, dc->r0);
904 LOG_DIS("xnor r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
908 if (dc->format == OP_FMT_RI) {
909 tcg_gen_xori_tl(cpu_R[dc->r1], cpu_R[dc->r0],
910 zero_extend(dc->imm16, 16));
911 tcg_gen_not_tl(cpu_R[dc->r1], cpu_R[dc->r1]);
913 tcg_gen_eqv_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
917 static void dec_xor(DisasContext *dc)
919 if (dc->format == OP_FMT_RI) {
920 LOG_DIS("xori r%d, r%d, %d\n", dc->r0, dc->r1,
921 zero_extend(dc->imm16, 16));
923 LOG_DIS("xor r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
926 if (dc->format == OP_FMT_RI) {
927 tcg_gen_xori_tl(cpu_R[dc->r1], cpu_R[dc->r0],
928 zero_extend(dc->imm16, 16));
930 tcg_gen_xor_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
934 static void dec_ill(DisasContext *dc)
936 cpu_abort(dc->env, "unknown opcode 0x%02x\n", dc->opcode);
939 typedef void (*DecoderInfo)(DisasContext *dc);
940 static const DecoderInfo decinfo[] = {
941 dec_sru, dec_nor, dec_mul, dec_sh, dec_lb, dec_sr, dec_xor, dec_lh,
942 dec_and, dec_xnor, dec_lw, dec_lhu, dec_sb, dec_add, dec_or, dec_sl,
943 dec_lbu, dec_be, dec_bg, dec_bge, dec_bgeu, dec_bgu, dec_sw, dec_bne,
944 dec_andhi, dec_cmpe, dec_cmpg, dec_cmpge, dec_cmpgeu, dec_cmpgu, dec_orhi,
946 dec_sru, dec_nor, dec_mul, dec_divu, dec_rcsr, dec_sr, dec_xor, dec_ill,
947 dec_and, dec_xnor, dec_ill, dec_scall, dec_sextb, dec_add, dec_or, dec_sl,
948 dec_b, dec_modu, dec_sub, dec_user, dec_wcsr, dec_ill, dec_call, dec_sexth,
949 dec_bi, dec_cmpe, dec_cmpg, dec_cmpge, dec_cmpgeu, dec_cmpgu, dec_calli,
953 static inline void decode(DisasContext *dc, uint32_t ir)
955 if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
956 tcg_gen_debug_insn_start(dc->pc);
960 LOG_DIS("%8.8x\t", dc->ir);
962 /* try guessing 'empty' instruction memory, although it may be a valid
963 * instruction sequence (eg. srui r0, r0, 0) */
967 LOG_DIS("nr_nops=%d\t", dc->nr_nops);
969 if (dc->nr_nops > 4) {
970 cpu_abort(dc->env, "fetching nop sequence\n");
974 dc->opcode = EXTRACT_FIELD(ir, 26, 31);
976 dc->imm5 = EXTRACT_FIELD(ir, 0, 4);
977 dc->imm16 = EXTRACT_FIELD(ir, 0, 15);
978 dc->imm26 = EXTRACT_FIELD(ir, 0, 25);
980 dc->csr = EXTRACT_FIELD(ir, 21, 25);
981 dc->r0 = EXTRACT_FIELD(ir, 21, 25);
982 dc->r1 = EXTRACT_FIELD(ir, 16, 20);
983 dc->r2 = EXTRACT_FIELD(ir, 11, 15);
985 /* bit 31 seems to indicate insn type. */
986 if (ir & (1 << 31)) {
987 dc->format = OP_FMT_RR;
989 dc->format = OP_FMT_RI;
992 assert(ARRAY_SIZE(decinfo) == 64);
993 assert(dc->opcode < 64);
995 decinfo[dc->opcode](dc);
998 static void check_breakpoint(CPULM32State *env, DisasContext *dc)
1002 if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
1003 QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
1004 if (bp->pc == dc->pc) {
1005 tcg_gen_movi_tl(cpu_pc, dc->pc);
1006 t_gen_raise_exception(dc, EXCP_DEBUG);
1007 dc->is_jmp = DISAS_UPDATE;
1013 /* generate intermediate code for basic block 'tb'. */
1014 static void gen_intermediate_code_internal(CPULM32State *env,
1015 TranslationBlock *tb, int search_pc)
1017 struct DisasContext ctx, *dc = &ctx;
1018 uint16_t *gen_opc_end;
1021 uint32_t next_page_start;
1029 gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE;
1031 dc->is_jmp = DISAS_NEXT;
1033 dc->singlestep_enabled = env->singlestep_enabled;
1037 cpu_abort(env, "LM32: unaligned PC=%x\n", pc_start);
1040 next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
1043 max_insns = tb->cflags & CF_COUNT_MASK;
1044 if (max_insns == 0) {
1045 max_insns = CF_COUNT_MASK;
1050 check_breakpoint(env, dc);
1053 j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
1057 tcg_ctx.gen_opc_instr_start[lj++] = 0;
1060 tcg_ctx.gen_opc_pc[lj] = dc->pc;
1061 tcg_ctx.gen_opc_instr_start[lj] = 1;
1062 tcg_ctx.gen_opc_icount[lj] = num_insns;
1066 LOG_DIS("%8.8x:\t", dc->pc);
1068 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) {
1072 decode(dc, cpu_ldl_code(env, dc->pc));
1076 } while (!dc->is_jmp
1077 && tcg_ctx.gen_opc_ptr < gen_opc_end
1078 && !env->singlestep_enabled
1080 && (dc->pc < next_page_start)
1081 && num_insns < max_insns);
1083 if (tb->cflags & CF_LAST_IO) {
1087 if (unlikely(env->singlestep_enabled)) {
1088 if (dc->is_jmp == DISAS_NEXT) {
1089 tcg_gen_movi_tl(cpu_pc, dc->pc);
1091 t_gen_raise_exception(dc, EXCP_DEBUG);
1093 switch (dc->is_jmp) {
1095 gen_goto_tb(dc, 1, dc->pc);
1100 /* indicate that the hash table must be used
1101 to find the next TB */
1105 /* nothing more to generate */
1110 gen_tb_end(tb, num_insns);
1111 *tcg_ctx.gen_opc_ptr = INDEX_op_end;
1113 j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
1116 tcg_ctx.gen_opc_instr_start[lj++] = 0;
1119 tb->size = dc->pc - pc_start;
1120 tb->icount = num_insns;
1124 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1126 log_target_disas(env, pc_start, dc->pc - pc_start, 0);
1127 qemu_log("\nisize=%d osize=%td\n",
1128 dc->pc - pc_start, tcg_ctx.gen_opc_ptr -
1129 tcg_ctx.gen_opc_buf);
1134 void gen_intermediate_code(CPULM32State *env, struct TranslationBlock *tb)
1136 gen_intermediate_code_internal(env, tb, 0);
1139 void gen_intermediate_code_pc(CPULM32State *env, struct TranslationBlock *tb)
1141 gen_intermediate_code_internal(env, tb, 1);
1144 void cpu_dump_state(CPULM32State *env, FILE *f, fprintf_function cpu_fprintf,
1153 cpu_fprintf(f, "IN: PC=%x %s\n",
1154 env->pc, lookup_symbol(env->pc));
1156 cpu_fprintf(f, "ie=%8.8x (IE=%x EIE=%x BIE=%x) im=%8.8x ip=%8.8x\n",
1158 (env->ie & IE_IE) ? 1 : 0,
1159 (env->ie & IE_EIE) ? 1 : 0,
1160 (env->ie & IE_BIE) ? 1 : 0,
1161 lm32_pic_get_im(env->pic_state),
1162 lm32_pic_get_ip(env->pic_state));
1163 cpu_fprintf(f, "eba=%8.8x deba=%8.8x\n",
1167 for (i = 0; i < 32; i++) {
1168 cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
1169 if ((i + 1) % 4 == 0) {
1170 cpu_fprintf(f, "\n");
1173 cpu_fprintf(f, "\n\n");
1176 void restore_state_to_opc(CPULM32State *env, TranslationBlock *tb, int pc_pos)
1178 env->pc = tcg_ctx.gen_opc_pc[pc_pos];
1181 void lm32_translate_init(void)
1185 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
1187 for (i = 0; i < ARRAY_SIZE(cpu_R); i++) {
1188 cpu_R[i] = tcg_global_mem_new(TCG_AREG0,
1189 offsetof(CPULM32State, regs[i]),
1193 for (i = 0; i < ARRAY_SIZE(cpu_bp); i++) {
1194 cpu_bp[i] = tcg_global_mem_new(TCG_AREG0,
1195 offsetof(CPULM32State, bp[i]),
1199 for (i = 0; i < ARRAY_SIZE(cpu_wp); i++) {
1200 cpu_wp[i] = tcg_global_mem_new(TCG_AREG0,
1201 offsetof(CPULM32State, wp[i]),
1205 cpu_pc = tcg_global_mem_new(TCG_AREG0,
1206 offsetof(CPULM32State, pc),
1208 cpu_ie = tcg_global_mem_new(TCG_AREG0,
1209 offsetof(CPULM32State, ie),
1211 cpu_icc = tcg_global_mem_new(TCG_AREG0,
1212 offsetof(CPULM32State, icc),
1214 cpu_dcc = tcg_global_mem_new(TCG_AREG0,
1215 offsetof(CPULM32State, dcc),
1217 cpu_cc = tcg_global_mem_new(TCG_AREG0,
1218 offsetof(CPULM32State, cc),
1220 cpu_cfg = tcg_global_mem_new(TCG_AREG0,
1221 offsetof(CPULM32State, cfg),
1223 cpu_eba = tcg_global_mem_new(TCG_AREG0,
1224 offsetof(CPULM32State, eba),
1226 cpu_dc = tcg_global_mem_new(TCG_AREG0,
1227 offsetof(CPULM32State, dc),
1229 cpu_deba = tcg_global_mem_new(TCG_AREG0,
1230 offsetof(CPULM32State, deba),