From: Richard Henderson <richard.hender...@linaro.org> Signed-off-by: Richard Henderson <richard.hender...@linaro.org> Message-Id: <20180512050250.12774-8-richard.hender...@linaro.org> Signed-off-by: Laurent Vivier <laur...@vivier.eu> --- target/m68k/translate.c | 180 +++++++++++++++++++++++------------------------- 1 file changed, 88 insertions(+), 92 deletions(-)
diff --git a/target/m68k/translate.c b/target/m68k/translate.c index 12a74b0b59..62a96bedcd 100644 --- a/target/m68k/translate.c +++ b/target/m68k/translate.c @@ -6059,113 +6059,109 @@ static void disas_m68k_insn(CPUM68KState * env, DisasContext *s) do_release(s); } -/* generate intermediate code for basic block 'tb'. */ -void gen_intermediate_code(CPUState *cs, TranslationBlock *tb) +static void m68k_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cpu) { - CPUM68KState *env = cs->env_ptr; - DisasContext dc1, *dc = &dc1; - target_ulong pc_start; - int pc_offset; - int num_insns; - int max_insns; - - /* generate intermediate code */ - pc_start = tb->pc; - - dc->base.tb = tb; + DisasContext *dc = container_of(dcbase, DisasContext, base); + CPUM68KState *env = cpu->env_ptr; dc->env = env; - dc->base.is_jmp = DISAS_NEXT; - dc->pc = pc_start; + dc->pc = dc->base.pc_first; dc->cc_op = CC_OP_DYNAMIC; dc->cc_op_synced = 1; - dc->base.singlestep_enabled = cs->singlestep_enabled; dc->done_mac = 0; dc->writeback_mask = 0; - num_insns = 0; - max_insns = tb_cflags(tb) & CF_COUNT_MASK; - if (max_insns == 0) { - max_insns = CF_COUNT_MASK; - } - if (max_insns > TCG_MAX_INSNS) { - max_insns = TCG_MAX_INSNS; - } - init_release_array(dc); +} - gen_tb_start(tb); - do { - pc_offset = dc->pc - pc_start; - tcg_gen_insn_start(dc->pc, dc->cc_op); - num_insns++; - - if (unlikely(cpu_breakpoint_test(cs, dc->pc, BP_ANY))) { - gen_exception(dc, dc->pc, EXCP_DEBUG); - /* The address covered by the breakpoint must be included in - [tb->pc, tb->pc + tb->size) in order to for it to be - properly cleared -- thus we increment the PC here so that - the logic setting tb->size below does the right thing. */ - dc->pc += 2; - break; - } +static void m68k_tr_tb_start(DisasContextBase *dcbase, CPUState *cpu) +{ +} - if (num_insns == max_insns && (tb_cflags(tb) & CF_LAST_IO)) { - gen_io_start(); - } +static void m68k_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu) +{ + DisasContext *dc = container_of(dcbase, DisasContext, base); + tcg_gen_insn_start(dc->base.pc_next, dc->cc_op); +} - dc->base.pc_next = dc->pc; - disas_m68k_insn(env, dc); - } while (!dc->base.is_jmp && !tcg_op_buf_full() && - !cs->singlestep_enabled && - !singlestep && - (pc_offset) < (TARGET_PAGE_SIZE - 32) && - num_insns < max_insns); - - if (tb_cflags(tb) & CF_LAST_IO) - gen_io_end(); - if (unlikely(cs->singlestep_enabled)) { - /* Make sure the pc is updated, and raise a debug exception. */ - if (!dc->base.is_jmp) { - update_cc_op(dc); - tcg_gen_movi_i32(QREG_PC, dc->pc); - } +static bool m68k_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu, + const CPUBreakpoint *bp) +{ + DisasContext *dc = container_of(dcbase, DisasContext, base); + + gen_exception(dc, dc->base.pc_next, EXCP_DEBUG); + /* The address covered by the breakpoint must be included in + [tb->pc, tb->pc + tb->size) in order to for it to be + properly cleared -- thus we increment the PC here so that + the logic setting tb->size below does the right thing. */ + dc->base.pc_next += 2; + + return true; +} + +static void m68k_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu) +{ + DisasContext *dc = container_of(dcbase, DisasContext, base); + + disas_m68k_insn(cpu->env_ptr, dc); + dc->base.pc_next = dc->pc; + + if (dc->base.is_jmp == DISAS_NEXT + && dc->pc - dc->base.pc_first >= TARGET_PAGE_SIZE - 32) { + dc->base.is_jmp = DISAS_TOO_MANY; + } +} + +static void m68k_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu) +{ + DisasContext *dc = container_of(dcbase, DisasContext, base); + + if (dc->base.is_jmp == DISAS_NORETURN) { + return; + } + if (dc->base.singlestep_enabled) { gen_helper_raise_exception(cpu_env, tcg_const_i32(EXCP_DEBUG)); - } else { - switch (dc->base.is_jmp) { - case DISAS_NEXT: - update_cc_op(dc); - gen_jmp_tb(dc, 0, dc->pc); - break; - case DISAS_JUMP: - /* We updated CC_OP and PC in gen_jmp/gen_jmp_im. */ - tcg_gen_lookup_and_goto_ptr(); - break; - default: - case DISAS_EXIT: - /* We updated CC_OP and PC in gen_exit_tb, but also modified - other state that may require returning to the main loop. */ - tcg_gen_exit_tb(NULL, 0); - break; - case DISAS_NORETURN: - /* nothing more to generate */ - break; - } + return; } - gen_tb_end(tb, num_insns); -#ifdef DEBUG_DISAS - if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM) - && qemu_log_in_addr_range(pc_start)) { - qemu_log_lock(); - qemu_log("----------------\n"); - qemu_log("IN: %s\n", lookup_symbol(pc_start)); - log_target_disas(cs, pc_start, dc->pc - pc_start); - qemu_log("\n"); - qemu_log_unlock(); + switch (dc->base.is_jmp) { + case DISAS_TOO_MANY: + update_cc_op(dc); + gen_jmp_tb(dc, 0, dc->pc); + break; + case DISAS_JUMP: + /* We updated CC_OP and PC in gen_jmp/gen_jmp_im. */ + tcg_gen_lookup_and_goto_ptr(); + break; + case DISAS_EXIT: + /* We updated CC_OP and PC in gen_exit_tb, but also modified + other state that may require returning to the main loop. */ + tcg_gen_exit_tb(NULL, 0); + break; + default: + g_assert_not_reached(); } -#endif - tb->size = dc->pc - pc_start; - tb->icount = num_insns; +} + +static void m68k_tr_disas_log(const DisasContextBase *dcbase, CPUState *cpu) +{ + qemu_log("IN: %s\n", lookup_symbol(dcbase->pc_first)); + log_target_disas(cpu, dcbase->pc_first, dcbase->tb->size); +} + +static const TranslatorOps m68k_tr_ops = { + .init_disas_context = m68k_tr_init_disas_context, + .tb_start = m68k_tr_tb_start, + .insn_start = m68k_tr_insn_start, + .breakpoint_check = m68k_tr_breakpoint_check, + .translate_insn = m68k_tr_translate_insn, + .tb_stop = m68k_tr_tb_stop, + .disas_log = m68k_tr_disas_log, +}; + +void gen_intermediate_code(CPUState *cpu, TranslationBlock *tb) +{ + DisasContext dc; + translator_loop(&m68k_tr_ops, &dc.base, cpu, tb); } static double floatx80_to_double(CPUM68KState *env, uint16_t high, uint64_t low) -- 2.14.4