| /* |
| * Xtensa ISA: |
| * http://www.tensilica.com/products/literature-docs/documentation/xtensa-isa-databook.htm |
| * |
| * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * * Neither the name of the Open Source and Linux Lab nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <stdio.h> |
| |
| #include "cpu.h" |
| #include "exec-all.h" |
| #include "disas.h" |
| #include "tcg-op.h" |
| #include "qemu-log.h" |
| |
| #include "helpers.h" |
| #define GEN_HELPER 1 |
| #include "helpers.h" |
| |
| typedef struct DisasContext { |
| const XtensaConfig *config; |
| TranslationBlock *tb; |
| uint32_t pc; |
| uint32_t next_pc; |
| int is_jmp; |
| int singlestep_enabled; |
| } DisasContext; |
| |
| static TCGv_ptr cpu_env; |
| static TCGv_i32 cpu_pc; |
| static TCGv_i32 cpu_R[16]; |
| |
| #include "gen-icount.h" |
| |
| void xtensa_translate_init(void) |
| { |
| static const char * const regnames[] = { |
| "ar0", "ar1", "ar2", "ar3", |
| "ar4", "ar5", "ar6", "ar7", |
| "ar8", "ar9", "ar10", "ar11", |
| "ar12", "ar13", "ar14", "ar15", |
| }; |
| int i; |
| |
| cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env"); |
| cpu_pc = tcg_global_mem_new_i32(TCG_AREG0, |
| offsetof(CPUState, pc), "pc"); |
| |
| for (i = 0; i < 16; i++) { |
| cpu_R[i] = tcg_global_mem_new_i32(TCG_AREG0, |
| offsetof(CPUState, regs[i]), |
| regnames[i]); |
| } |
| #define GEN_HELPER 2 |
| #include "helpers.h" |
| } |
| |
| static inline bool option_enabled(DisasContext *dc, int opt) |
| { |
| return xtensa_option_enabled(dc->config, opt); |
| } |
| |
| static void gen_exception(int excp) |
| { |
| TCGv_i32 tmp = tcg_const_i32(excp); |
| gen_helper_exception(tmp); |
| tcg_temp_free(tmp); |
| } |
| |
| static void gen_jump_slot(DisasContext *dc, TCGv dest, int slot) |
| { |
| tcg_gen_mov_i32(cpu_pc, dest); |
| if (dc->singlestep_enabled) { |
| gen_exception(EXCP_DEBUG); |
| } else { |
| if (slot >= 0) { |
| tcg_gen_goto_tb(slot); |
| tcg_gen_exit_tb((tcg_target_long)dc->tb + slot); |
| } else { |
| tcg_gen_exit_tb(0); |
| } |
| } |
| dc->is_jmp = DISAS_UPDATE; |
| } |
| |
| static void gen_jump(DisasContext *dc, TCGv dest) |
| { |
| gen_jump_slot(dc, dest, -1); |
| } |
| |
| static void gen_jumpi(DisasContext *dc, uint32_t dest, int slot) |
| { |
| TCGv_i32 tmp = tcg_const_i32(dest); |
| if (((dc->pc ^ dest) & TARGET_PAGE_MASK) != 0) { |
| slot = -1; |
| } |
| gen_jump_slot(dc, tmp, slot); |
| tcg_temp_free(tmp); |
| } |
| |
| static void gen_brcond(DisasContext *dc, TCGCond cond, |
| TCGv_i32 t0, TCGv_i32 t1, uint32_t offset) |
| { |
| int label = gen_new_label(); |
| |
| tcg_gen_brcond_i32(cond, t0, t1, label); |
| gen_jumpi(dc, dc->next_pc, 0); |
| gen_set_label(label); |
| gen_jumpi(dc, dc->pc + offset, 1); |
| } |
| |
| static void gen_brcondi(DisasContext *dc, TCGCond cond, |
| TCGv_i32 t0, uint32_t t1, uint32_t offset) |
| { |
| TCGv_i32 tmp = tcg_const_i32(t1); |
| gen_brcond(dc, cond, t0, tmp, offset); |
| tcg_temp_free(tmp); |
| } |
| |
| static void disas_xtensa_insn(DisasContext *dc) |
| { |
| #define HAS_OPTION(opt) do { \ |
| if (!option_enabled(dc, opt)) { \ |
| qemu_log("Option %d is not enabled %s:%d\n", \ |
| (opt), __FILE__, __LINE__); \ |
| goto invalid_opcode; \ |
| } \ |
| } while (0) |
| |
| #ifdef TARGET_WORDS_BIGENDIAN |
| #define OP0 (((b0) & 0xf0) >> 4) |
| #define OP1 (((b2) & 0xf0) >> 4) |
| #define OP2 ((b2) & 0xf) |
| #define RRR_R ((b1) & 0xf) |
| #define RRR_S (((b1) & 0xf0) >> 4) |
| #define RRR_T ((b0) & 0xf) |
| #else |
| #define OP0 (((b0) & 0xf)) |
| #define OP1 (((b2) & 0xf)) |
| #define OP2 (((b2) & 0xf0) >> 4) |
| #define RRR_R (((b1) & 0xf0) >> 4) |
| #define RRR_S (((b1) & 0xf)) |
| #define RRR_T (((b0) & 0xf0) >> 4) |
| #endif |
| |
| #define RRRN_R RRR_R |
| #define RRRN_S RRR_S |
| #define RRRN_T RRR_T |
| |
| #define RRI8_R RRR_R |
| #define RRI8_S RRR_S |
| #define RRI8_T RRR_T |
| #define RRI8_IMM8 (b2) |
| #define RRI8_IMM8_SE ((((b2) & 0x80) ? 0xffffff00 : 0) | RRI8_IMM8) |
| |
| #ifdef TARGET_WORDS_BIGENDIAN |
| #define RI16_IMM16 (((b1) << 8) | (b2)) |
| #else |
| #define RI16_IMM16 (((b2) << 8) | (b1)) |
| #endif |
| |
| #ifdef TARGET_WORDS_BIGENDIAN |
| #define CALL_N (((b0) & 0xc) >> 2) |
| #define CALL_OFFSET ((((b0) & 0x3) << 16) | ((b1) << 8) | (b2)) |
| #else |
| #define CALL_N (((b0) & 0x30) >> 4) |
| #define CALL_OFFSET ((((b0) & 0xc0) >> 6) | ((b1) << 2) | ((b2) << 10)) |
| #endif |
| #define CALL_OFFSET_SE \ |
| (((CALL_OFFSET & 0x20000) ? 0xfffc0000 : 0) | CALL_OFFSET) |
| |
| #define CALLX_N CALL_N |
| #ifdef TARGET_WORDS_BIGENDIAN |
| #define CALLX_M ((b0) & 0x3) |
| #else |
| #define CALLX_M (((b0) & 0xc0) >> 6) |
| #endif |
| #define CALLX_S RRR_S |
| |
| #define BRI12_M CALLX_M |
| #define BRI12_S RRR_S |
| #ifdef TARGET_WORDS_BIGENDIAN |
| #define BRI12_IMM12 ((((b1) & 0xf) << 8) | (b2)) |
| #else |
| #define BRI12_IMM12 ((((b1) & 0xf0) >> 4) | ((b2) << 4)) |
| #endif |
| #define BRI12_IMM12_SE (((BRI12_IMM12 & 0x800) ? 0xfffff000 : 0) | BRI12_IMM12) |
| |
| #define BRI8_M BRI12_M |
| #define BRI8_R RRI8_R |
| #define BRI8_S RRI8_S |
| #define BRI8_IMM8 RRI8_IMM8 |
| #define BRI8_IMM8_SE RRI8_IMM8_SE |
| |
| #define RSR_SR (b1) |
| |
| uint8_t b0 = ldub_code(dc->pc); |
| uint8_t b1 = ldub_code(dc->pc + 1); |
| uint8_t b2 = ldub_code(dc->pc + 2); |
| |
| static const uint32_t B4CONST[] = { |
| 0xffffffff, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 16, 32, 64, 128, 256 |
| }; |
| |
| static const uint32_t B4CONSTU[] = { |
| 32768, 65536, 2, 3, 4, 5, 6, 7, 8, 10, 12, 16, 32, 64, 128, 256 |
| }; |
| |
| if (OP0 >= 8) { |
| dc->next_pc = dc->pc + 2; |
| HAS_OPTION(XTENSA_OPTION_CODE_DENSITY); |
| } else { |
| dc->next_pc = dc->pc + 3; |
| } |
| |
| switch (OP0) { |
| case 0: /*QRST*/ |
| switch (OP1) { |
| case 0: /*RST0*/ |
| switch (OP2) { |
| case 0: /*ST0*/ |
| if ((RRR_R & 0xc) == 0x8) { |
| HAS_OPTION(XTENSA_OPTION_BOOLEAN); |
| } |
| |
| switch (RRR_R) { |
| case 0: /*SNM0*/ |
| switch (CALLX_M) { |
| case 0: /*ILL*/ |
| break; |
| |
| case 1: /*reserved*/ |
| break; |
| |
| case 2: /*JR*/ |
| switch (CALLX_N) { |
| case 0: /*RET*/ |
| case 2: /*JX*/ |
| gen_jump(dc, cpu_R[CALLX_S]); |
| break; |
| |
| case 1: /*RETWw*/ |
| HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER); |
| break; |
| |
| case 3: /*reserved*/ |
| break; |
| } |
| break; |
| |
| case 3: /*CALLX*/ |
| switch (CALLX_N) { |
| case 0: /*CALLX0*/ |
| { |
| TCGv_i32 tmp = tcg_temp_new_i32(); |
| tcg_gen_mov_i32(tmp, cpu_R[CALLX_S]); |
| tcg_gen_movi_i32(cpu_R[0], dc->next_pc); |
| gen_jump(dc, tmp); |
| tcg_temp_free(tmp); |
| } |
| break; |
| |
| case 1: /*CALLX4w*/ |
| case 2: /*CALLX8w*/ |
| case 3: /*CALLX12w*/ |
| HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER); |
| break; |
| } |
| break; |
| } |
| break; |
| |
| case 1: /*MOVSPw*/ |
| HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER); |
| break; |
| |
| case 2: /*SYNC*/ |
| break; |
| |
| case 3: |
| break; |
| |
| } |
| break; |
| |
| case 1: /*AND*/ |
| tcg_gen_and_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]); |
| break; |
| |
| case 2: /*OR*/ |
| tcg_gen_or_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]); |
| break; |
| |
| case 3: /*XOR*/ |
| tcg_gen_xor_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]); |
| break; |
| |
| case 4: /*ST1*/ |
| break; |
| |
| case 5: /*TLB*/ |
| break; |
| |
| case 6: /*RT0*/ |
| switch (RRR_S) { |
| case 0: /*NEG*/ |
| tcg_gen_neg_i32(cpu_R[RRR_R], cpu_R[RRR_T]); |
| break; |
| |
| case 1: /*ABS*/ |
| { |
| int label = gen_new_label(); |
| tcg_gen_mov_i32(cpu_R[RRR_R], cpu_R[RRR_T]); |
| tcg_gen_brcondi_i32( |
| TCG_COND_GE, cpu_R[RRR_R], 0, label); |
| tcg_gen_neg_i32(cpu_R[RRR_R], cpu_R[RRR_T]); |
| gen_set_label(label); |
| } |
| break; |
| |
| default: /*reserved*/ |
| break; |
| } |
| break; |
| |
| case 7: /*reserved*/ |
| break; |
| |
| case 8: /*ADD*/ |
| tcg_gen_add_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]); |
| break; |
| |
| case 9: /*ADD**/ |
| case 10: |
| case 11: |
| { |
| TCGv_i32 tmp = tcg_temp_new_i32(); |
| tcg_gen_shli_i32(tmp, cpu_R[RRR_S], OP2 - 8); |
| tcg_gen_add_i32(cpu_R[RRR_R], tmp, cpu_R[RRR_T]); |
| tcg_temp_free(tmp); |
| } |
| break; |
| |
| case 12: /*SUB*/ |
| tcg_gen_sub_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]); |
| break; |
| |
| case 13: /*SUB**/ |
| case 14: |
| case 15: |
| { |
| TCGv_i32 tmp = tcg_temp_new_i32(); |
| tcg_gen_shli_i32(tmp, cpu_R[RRR_S], OP2 - 12); |
| tcg_gen_sub_i32(cpu_R[RRR_R], tmp, cpu_R[RRR_T]); |
| tcg_temp_free(tmp); |
| } |
| break; |
| } |
| break; |
| |
| case 1: /*RST1*/ |
| break; |
| |
| case 2: /*RST2*/ |
| break; |
| |
| case 3: /*RST3*/ |
| break; |
| |
| case 4: /*EXTUI*/ |
| case 5: |
| break; |
| |
| case 6: /*CUST0*/ |
| break; |
| |
| case 7: /*CUST1*/ |
| break; |
| |
| case 8: /*LSCXp*/ |
| HAS_OPTION(XTENSA_OPTION_COPROCESSOR); |
| break; |
| |
| case 9: /*LSC4*/ |
| break; |
| |
| case 10: /*FP0*/ |
| HAS_OPTION(XTENSA_OPTION_FP_COPROCESSOR); |
| break; |
| |
| case 11: /*FP1*/ |
| HAS_OPTION(XTENSA_OPTION_FP_COPROCESSOR); |
| break; |
| |
| default: /*reserved*/ |
| break; |
| } |
| break; |
| |
| case 1: /*L32R*/ |
| { |
| TCGv_i32 tmp = tcg_const_i32( |
| (0xfffc0000 | (RI16_IMM16 << 2)) + |
| ((dc->pc + 3) & ~3)); |
| |
| /* no ext L32R */ |
| |
| tcg_gen_qemu_ld32u(cpu_R[RRR_T], tmp, 0); |
| tcg_temp_free(tmp); |
| } |
| break; |
| |
| case 2: /*LSAI*/ |
| break; |
| |
| case 3: /*LSCIp*/ |
| HAS_OPTION(XTENSA_OPTION_COPROCESSOR); |
| break; |
| |
| case 4: /*MAC16d*/ |
| HAS_OPTION(XTENSA_OPTION_MAC16); |
| break; |
| |
| case 5: /*CALLN*/ |
| switch (CALL_N) { |
| case 0: /*CALL0*/ |
| tcg_gen_movi_i32(cpu_R[0], dc->next_pc); |
| gen_jumpi(dc, (dc->pc & ~3) + (CALL_OFFSET_SE << 2) + 4, 0); |
| break; |
| |
| case 1: /*CALL4w*/ |
| case 2: /*CALL8w*/ |
| case 3: /*CALL12w*/ |
| HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER); |
| break; |
| } |
| break; |
| |
| case 6: /*SI*/ |
| switch (CALL_N) { |
| case 0: /*J*/ |
| gen_jumpi(dc, dc->pc + 4 + CALL_OFFSET_SE, 0); |
| break; |
| |
| case 1: /*BZ*/ |
| { |
| static const TCGCond cond[] = { |
| TCG_COND_EQ, /*BEQZ*/ |
| TCG_COND_NE, /*BNEZ*/ |
| TCG_COND_LT, /*BLTZ*/ |
| TCG_COND_GE, /*BGEZ*/ |
| }; |
| |
| gen_brcondi(dc, cond[BRI12_M & 3], cpu_R[BRI12_S], 0, |
| 4 + BRI12_IMM12_SE); |
| } |
| break; |
| |
| case 2: /*BI0*/ |
| { |
| static const TCGCond cond[] = { |
| TCG_COND_EQ, /*BEQI*/ |
| TCG_COND_NE, /*BNEI*/ |
| TCG_COND_LT, /*BLTI*/ |
| TCG_COND_GE, /*BGEI*/ |
| }; |
| |
| gen_brcondi(dc, cond[BRI8_M & 3], |
| cpu_R[BRI8_S], B4CONST[BRI8_R], 4 + BRI8_IMM8_SE); |
| } |
| break; |
| |
| case 3: /*BI1*/ |
| switch (BRI8_M) { |
| case 0: /*ENTRYw*/ |
| HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER); |
| break; |
| |
| case 1: /*B1*/ |
| switch (BRI8_R) { |
| case 0: /*BFp*/ |
| HAS_OPTION(XTENSA_OPTION_BOOLEAN); |
| break; |
| |
| case 1: /*BTp*/ |
| HAS_OPTION(XTENSA_OPTION_BOOLEAN); |
| break; |
| |
| case 8: /*LOOP*/ |
| break; |
| |
| case 9: /*LOOPNEZ*/ |
| break; |
| |
| case 10: /*LOOPGTZ*/ |
| break; |
| |
| default: /*reserved*/ |
| break; |
| |
| } |
| break; |
| |
| case 2: /*BLTUI*/ |
| case 3: /*BGEUI*/ |
| gen_brcondi(dc, BRI8_M == 2 ? TCG_COND_LTU : TCG_COND_GEU, |
| cpu_R[BRI8_S], B4CONSTU[BRI8_R], 4 + BRI8_IMM8_SE); |
| break; |
| } |
| break; |
| |
| } |
| break; |
| |
| case 7: /*B*/ |
| { |
| TCGCond eq_ne = (RRI8_R & 8) ? TCG_COND_NE : TCG_COND_EQ; |
| |
| switch (RRI8_R & 7) { |
| case 0: /*BNONE*/ /*BANY*/ |
| { |
| TCGv_i32 tmp = tcg_temp_new_i32(); |
| tcg_gen_and_i32(tmp, cpu_R[RRI8_S], cpu_R[RRI8_T]); |
| gen_brcondi(dc, eq_ne, tmp, 0, 4 + RRI8_IMM8_SE); |
| tcg_temp_free(tmp); |
| } |
| break; |
| |
| case 1: /*BEQ*/ /*BNE*/ |
| case 2: /*BLT*/ /*BGE*/ |
| case 3: /*BLTU*/ /*BGEU*/ |
| { |
| static const TCGCond cond[] = { |
| [1] = TCG_COND_EQ, |
| [2] = TCG_COND_LT, |
| [3] = TCG_COND_LTU, |
| [9] = TCG_COND_NE, |
| [10] = TCG_COND_GE, |
| [11] = TCG_COND_GEU, |
| }; |
| gen_brcond(dc, cond[RRI8_R], cpu_R[RRI8_S], cpu_R[RRI8_T], |
| 4 + RRI8_IMM8_SE); |
| } |
| break; |
| |
| case 4: /*BALL*/ /*BNALL*/ |
| { |
| TCGv_i32 tmp = tcg_temp_new_i32(); |
| tcg_gen_and_i32(tmp, cpu_R[RRI8_S], cpu_R[RRI8_T]); |
| gen_brcond(dc, eq_ne, tmp, cpu_R[RRI8_T], |
| 4 + RRI8_IMM8_SE); |
| tcg_temp_free(tmp); |
| } |
| break; |
| |
| case 5: /*BBC*/ /*BBS*/ |
| { |
| TCGv_i32 bit = tcg_const_i32(1); |
| TCGv_i32 tmp = tcg_temp_new_i32(); |
| tcg_gen_andi_i32(tmp, cpu_R[RRI8_T], 0x1f); |
| tcg_gen_shl_i32(bit, bit, tmp); |
| tcg_gen_and_i32(tmp, cpu_R[RRI8_S], bit); |
| gen_brcondi(dc, eq_ne, tmp, 0, 4 + RRI8_IMM8_SE); |
| tcg_temp_free(tmp); |
| tcg_temp_free(bit); |
| } |
| break; |
| |
| case 6: /*BBCI*/ /*BBSI*/ |
| case 7: |
| { |
| TCGv_i32 tmp = tcg_temp_new_i32(); |
| tcg_gen_andi_i32(tmp, cpu_R[RRI8_S], |
| 1 << (((RRI8_R & 1) << 4) | RRI8_T)); |
| gen_brcondi(dc, eq_ne, tmp, 0, 4 + RRI8_IMM8_SE); |
| tcg_temp_free(tmp); |
| } |
| break; |
| |
| } |
| } |
| break; |
| |
| #define gen_narrow_load_store(type) do { \ |
| TCGv_i32 addr = tcg_temp_new_i32(); \ |
| tcg_gen_addi_i32(addr, cpu_R[RRRN_S], RRRN_R << 2); \ |
| tcg_gen_qemu_##type(cpu_R[RRRN_T], addr, 0); \ |
| tcg_temp_free(addr); \ |
| } while (0) |
| |
| case 8: /*L32I.Nn*/ |
| gen_narrow_load_store(ld32u); |
| break; |
| |
| case 9: /*S32I.Nn*/ |
| gen_narrow_load_store(st32); |
| break; |
| #undef gen_narrow_load_store |
| |
| case 10: /*ADD.Nn*/ |
| tcg_gen_add_i32(cpu_R[RRRN_R], cpu_R[RRRN_S], cpu_R[RRRN_T]); |
| break; |
| |
| case 11: /*ADDI.Nn*/ |
| tcg_gen_addi_i32(cpu_R[RRRN_R], cpu_R[RRRN_S], RRRN_T ? RRRN_T : -1); |
| break; |
| |
| case 12: /*ST2n*/ |
| if (RRRN_T < 8) { /*MOVI.Nn*/ |
| tcg_gen_movi_i32(cpu_R[RRRN_S], |
| RRRN_R | (RRRN_T << 4) | |
| ((RRRN_T & 6) == 6 ? 0xffffff80 : 0)); |
| } else { /*BEQZ.Nn*/ /*BNEZ.Nn*/ |
| TCGCond eq_ne = (RRRN_T & 4) ? TCG_COND_NE : TCG_COND_EQ; |
| |
| gen_brcondi(dc, eq_ne, cpu_R[RRRN_S], 0, |
| 4 + (RRRN_R | ((RRRN_T & 3) << 4))); |
| } |
| break; |
| |
| case 13: /*ST3n*/ |
| switch (RRRN_R) { |
| case 0: /*MOV.Nn*/ |
| tcg_gen_mov_i32(cpu_R[RRRN_T], cpu_R[RRRN_S]); |
| break; |
| |
| case 15: /*S3*/ |
| switch (RRRN_T) { |
| case 0: /*RET.Nn*/ |
| gen_jump(dc, cpu_R[0]); |
| break; |
| |
| case 1: /*RETW.Nn*/ |
| break; |
| |
| case 2: /*BREAK.Nn*/ |
| break; |
| |
| case 3: /*NOP.Nn*/ |
| break; |
| |
| case 6: /*ILL.Nn*/ |
| break; |
| |
| default: /*reserved*/ |
| break; |
| } |
| break; |
| |
| default: /*reserved*/ |
| break; |
| } |
| break; |
| |
| default: /*reserved*/ |
| break; |
| } |
| |
| dc->pc = dc->next_pc; |
| return; |
| |
| invalid_opcode: |
| qemu_log("INVALID(pc = %08x)\n", dc->pc); |
| dc->pc = dc->next_pc; |
| #undef HAS_OPTION |
| } |
| |
| static void check_breakpoint(CPUState *env, DisasContext *dc) |
| { |
| CPUBreakpoint *bp; |
| |
| if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) { |
| QTAILQ_FOREACH(bp, &env->breakpoints, entry) { |
| if (bp->pc == dc->pc) { |
| tcg_gen_movi_i32(cpu_pc, dc->pc); |
| gen_exception(EXCP_DEBUG); |
| dc->is_jmp = DISAS_UPDATE; |
| } |
| } |
| } |
| } |
| |
| static void gen_intermediate_code_internal( |
| CPUState *env, TranslationBlock *tb, int search_pc) |
| { |
| DisasContext dc; |
| int insn_count = 0; |
| int j, lj = -1; |
| uint16_t *gen_opc_end = gen_opc_buf + OPC_MAX_SIZE; |
| int max_insns = tb->cflags & CF_COUNT_MASK; |
| uint32_t pc_start = tb->pc; |
| uint32_t next_page_start = |
| (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE; |
| |
| if (max_insns == 0) { |
| max_insns = CF_COUNT_MASK; |
| } |
| |
| dc.config = env->config; |
| dc.singlestep_enabled = env->singlestep_enabled; |
| dc.tb = tb; |
| dc.pc = pc_start; |
| dc.is_jmp = DISAS_NEXT; |
| |
| gen_icount_start(); |
| |
| do { |
| check_breakpoint(env, &dc); |
| |
| if (search_pc) { |
| j = gen_opc_ptr - gen_opc_buf; |
| if (lj < j) { |
| lj++; |
| while (lj < j) { |
| gen_opc_instr_start[lj++] = 0; |
| } |
| } |
| gen_opc_pc[lj] = dc.pc; |
| gen_opc_instr_start[lj] = 1; |
| gen_opc_icount[lj] = insn_count; |
| } |
| |
| if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) { |
| tcg_gen_debug_insn_start(dc.pc); |
| } |
| |
| disas_xtensa_insn(&dc); |
| ++insn_count; |
| if (env->singlestep_enabled) { |
| tcg_gen_movi_i32(cpu_pc, dc.pc); |
| gen_exception(EXCP_DEBUG); |
| break; |
| } |
| } while (dc.is_jmp == DISAS_NEXT && |
| insn_count < max_insns && |
| dc.pc < next_page_start && |
| gen_opc_ptr < gen_opc_end); |
| |
| if (dc.is_jmp == DISAS_NEXT) { |
| gen_jumpi(&dc, dc.pc, 0); |
| } |
| gen_icount_end(tb, insn_count); |
| *gen_opc_ptr = INDEX_op_end; |
| |
| if (!search_pc) { |
| tb->size = dc.pc - pc_start; |
| tb->icount = insn_count; |
| } |
| } |
| |
| void gen_intermediate_code(CPUState *env, TranslationBlock *tb) |
| { |
| gen_intermediate_code_internal(env, tb, 0); |
| } |
| |
| void gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb) |
| { |
| gen_intermediate_code_internal(env, tb, 1); |
| } |
| |
| void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf, |
| int flags) |
| { |
| int i; |
| |
| cpu_fprintf(f, "PC=%08x\n", env->pc); |
| |
| for (i = 0; i < 16; ++i) { |
| cpu_fprintf(f, "A%02d=%08x%c", i, env->regs[i], |
| (i % 4) == 3 ? '\n' : ' '); |
| } |
| } |
| |
| void restore_state_to_opc(CPUState *env, TranslationBlock *tb, int pc_pos) |
| { |
| env->pc = gen_opc_pc[pc_pos]; |
| } |
