@@ -3119,17 +3119,11 @@ static unsigned int crisv32_decoder(CPUCRISState *env, DisasContext *dc)
*
*/
-/* generate intermediate code for basic block 'tb'. */
-void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
+static void cris_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
{
+ DisasContext *dc = container_of(dcbase, DisasContext, base);
CPUCRISState *env = cs->env_ptr;
- uint32_t pc_start;
- unsigned int insn_len;
- struct DisasContext ctx;
- struct DisasContext *dc = &ctx;
- uint32_t page_start;
- target_ulong npc;
- int num_insns;
+ uint32_t tb_flags;
if (env->pregs[PR_VR] == 32) {
dc->decoder = crisv32_decoder;
@@ -3139,23 +3133,21 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
dc->clear_locked_irq = 1;
}
- /* Odd PC indicates that branch is rexecuting due to exception in the
+ /*
+ * Odd PC indicates that branch is rexecuting due to exception in the
* delayslot, like in real hw.
*/
- pc_start = tb->pc & ~1;
-
- dc->base.tb = tb;
- dc->base.pc_first = pc_start;
- dc->base.pc_next = pc_start;
- dc->base.is_jmp = DISAS_NEXT;
- dc->base.singlestep_enabled = cs->singlestep_enabled;
+ dc->base.pc_first &= ~1;
+ dc->base.pc_next &= ~1;
dc->cpu = env_archcpu(env);
- dc->ppc = pc_start;
- dc->pc = pc_start;
+ dc->ppc = dc->base.pc_next;
+ dc->pc = dc->base.pc_next;
dc->flags_uptodate = 1;
dc->flagx_known = 1;
- dc->flags_x = tb->flags & X_FLAG;
+ tb_flags = dc->base.tb->flags;
+ dc->tb_flags = tb_flags & (S_FLAG | P_FLAG | U_FLAG | X_FLAG | PFIX_FLAG);
+ dc->flags_x = tb_flags & X_FLAG;
dc->cc_x_uptodate = 0;
dc->cc_mask = 0;
dc->update_cc = 0;
@@ -3165,9 +3157,7 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
dc->cc_size_uptodate = -1;
/* Decode TB flags. */
- dc->tb_flags = tb->flags & (S_FLAG | P_FLAG | U_FLAG \
- | X_FLAG | PFIX_FLAG);
- dc->delayed_branch = !!(tb->flags & 7);
+ dc->delayed_branch = !!(tb_flags & 7);
if (dc->delayed_branch) {
dc->jmp = JMP_INDIRECT;
} else {
@@ -3176,113 +3166,146 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
dc->cpustate_changed = 0;
- page_start = pc_start & TARGET_PAGE_MASK;
- num_insns = 0;
+ if ((dc->base.singlestep_enabled || singlestep)
+ && dc->base.max_insns > 1) {
+ /* If re-executing a branch, execute both. */
+ dc->base.max_insns = 1 + (dc->base.tb->pc & 1);
+ }
+}
- gen_tb_start(tb);
- do {
- tcg_gen_insn_start(dc->delayed_branch == 1
- ? dc->ppc | 1 : dc->pc);
- num_insns++;
+static void cris_tr_tb_start(DisasContextBase *db, CPUState *cpu)
+{
+}
- if (unlikely(cpu_breakpoint_test(cs, dc->pc, BP_ANY))) {
- cris_evaluate_flags(dc);
- tcg_gen_movi_tl(env_pc, dc->pc);
- t_gen_raise_exception(EXCP_DEBUG);
- dc->base.is_jmp = DISAS_NORETURN;
- /* 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 cris_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu)
+{
+ DisasContext *dc = container_of(dcbase, DisasContext, base);
- /* Pretty disas. */
- LOG_DIS("%8.8x:\t", dc->pc);
+ tcg_gen_insn_start(dc->delayed_branch == 1 ? dc->ppc | 1 : dc->pc);
+}
- if (num_insns == max_insns && (tb_cflags(tb) & CF_LAST_IO)) {
- gen_io_start();
- }
- dc->clear_x = 1;
+static bool cris_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu,
+ const CPUBreakpoint *bp)
+{
+ DisasContext *dc = container_of(dcbase, DisasContext, base);
- insn_len = dc->decoder(env, dc);
- dc->ppc = dc->pc;
- dc->pc += insn_len;
- if (dc->clear_x) {
- cris_clear_x_flag(dc);
- }
+ cris_evaluate_flags(dc);
+ tcg_gen_movi_tl(env_pc, dc->pc);
+ t_gen_raise_exception(EXCP_DEBUG);
+ dc->base.is_jmp = DISAS_NORETURN;
+ /*
+ * 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;
+ return true;
+}
- /* Check for delayed branches here. If we do it before
- actually generating any host code, the simulator will just
- loop doing nothing for on this program location. */
- if (dc->delayed_branch) {
- dc->delayed_branch--;
- if (dc->delayed_branch == 0) {
- if (tb->flags & 7) {
- t_gen_movi_env_TN(dslot, 0);
- }
- if (dc->cpustate_changed || !dc->flagx_known
- || (dc->flags_x != (tb->flags & X_FLAG))) {
- cris_store_direct_jmp(dc);
- }
+static void cris_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs)
+{
+ DisasContext *dc = container_of(dcbase, DisasContext, base);
+ CPUCRISState *env = cs->env_ptr;
+ unsigned int insn_len;
- if (dc->clear_locked_irq) {
- dc->clear_locked_irq = 0;
- t_gen_movi_env_TN(locked_irq, 0);
- }
+ /* Pretty disas. */
+ LOG_DIS("%8.8x:\t", dc->pc);
- if (dc->jmp == JMP_DIRECT_CC) {
- TCGLabel *l1 = gen_new_label();
- cris_evaluate_flags(dc);
+ dc->clear_x = 1;
- /* Conditional jmp. */
- tcg_gen_brcondi_tl(TCG_COND_EQ,
- env_btaken, 0, l1);
- gen_goto_tb(dc, 1, dc->jmp_pc);
- gen_set_label(l1);
- gen_goto_tb(dc, 0, dc->pc);
- dc->base.is_jmp = DISAS_NORETURN;
- dc->jmp = JMP_NOJMP;
- } else if (dc->jmp == JMP_DIRECT) {
- cris_evaluate_flags(dc);
- gen_goto_tb(dc, 0, dc->jmp_pc);
- dc->base.is_jmp = DISAS_NORETURN;
- dc->jmp = JMP_NOJMP;
- } else {
- TCGv c = tcg_const_tl(dc->pc);
- t_gen_cc_jmp(env_btarget, c);
- tcg_temp_free(c);
- dc->base.is_jmp = DISAS_JUMP;
- }
- break;
+ insn_len = dc->decoder(env, dc);
+ dc->ppc = dc->pc;
+ dc->pc += insn_len;
+ dc->base.pc_next += insn_len;
+
+ if (dc->clear_x) {
+ cris_clear_x_flag(dc);
+ }
+
+ /*
+ * Check for delayed branches here. If we do it before
+ * actually generating any host code, the simulator will just
+ * loop doing nothing for on this program location.
+ */
+ if (dc->delayed_branch) {
+ dc->delayed_branch--;
+ if (dc->delayed_branch == 0) {
+ if (dc->base.tb->flags & 7) {
+ t_gen_movi_env_TN(dslot, 0);
+ }
+
+ if (dc->cpustate_changed
+ || !dc->flagx_known
+ || (dc->flags_x != (dc->base.tb->flags & X_FLAG))) {
+ cris_store_direct_jmp(dc);
+ }
+
+ if (dc->clear_locked_irq) {
+ dc->clear_locked_irq = 0;
+ t_gen_movi_env_TN(locked_irq, 0);
+ }
+
+ if (dc->jmp == JMP_DIRECT_CC) {
+ TCGLabel *l1 = gen_new_label();
+ cris_evaluate_flags(dc);
+
+ /* Conditional jmp. */
+ tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
+ gen_goto_tb(dc, 1, dc->jmp_pc);
+ gen_set_label(l1);
+ gen_goto_tb(dc, 0, dc->pc);
+ dc->base.is_jmp = DISAS_NORETURN;
+ dc->jmp = JMP_NOJMP;
+ } else if (dc->jmp == JMP_DIRECT) {
+ cris_evaluate_flags(dc);
+ gen_goto_tb(dc, 0, dc->jmp_pc);
+ dc->base.is_jmp = DISAS_NORETURN;
+ dc->jmp = JMP_NOJMP;
+ } else {
+ TCGv c = tcg_const_tl(dc->pc);
+ t_gen_cc_jmp(env_btarget, c);
+ tcg_temp_free(c);
+ dc->base.is_jmp = DISAS_JUMP;
}
}
+ }
- /* If we are rexecuting a branch due to exceptions on
- delay slots don't break. */
- if (!(tb->pc & 1) && cs->singlestep_enabled) {
- break;
- }
- } while (!dc->base.is_jmp && !dc->cpustate_changed
- && !tcg_op_buf_full()
- && !singlestep
- && (dc->pc - page_start < TARGET_PAGE_SIZE)
- && num_insns < max_insns);
+ /* Force an update if the per-tb cpu state has changed. */
+ if (dc->base.is_jmp == DISAS_NEXT
+ && (dc->cpustate_changed
+ || !dc->flagx_known
+ || (dc->flags_x != (dc->base.tb->flags & X_FLAG)))) {
+ dc->base.is_jmp = DISAS_UPDATE;
+ tcg_gen_movi_tl(env_pc, dc->pc);
+ }
+
+ /*
+ * FIXME: Only the first insn in the TB should cross a page boundary.
+ * If we can detect the length of the next insn easily, we should.
+ * In the meantime, simply stop when we do cross.
+ */
+ if (dc->base.is_jmp == DISAS_NEXT
+ && ((dc->pc ^ dc->base.pc_first) & TARGET_PAGE_MASK) != 0) {
+ dc->base.is_jmp = DISAS_TOO_MANY;
+ }
+}
+
+static void cris_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu)
+{
+ DisasContext *dc = container_of(dcbase, DisasContext, base);
+ target_ulong npc = dc->pc;
+
+ if (dc->base.is_jmp == DISAS_NORETURN) {
+ /* If we have a broken branch+delayslot sequence, it's too late. */
+ assert(dc->delayed_branch != 1);
+ return;
+ }
if (dc->clear_locked_irq) {
t_gen_movi_env_TN(locked_irq, 0);
}
- npc = dc->pc;
-
- /* Force an update if the per-tb cpu state has changed. */
- if (dc->base.is_jmp == DISAS_NEXT
- && (dc->cpustate_changed || !dc->flagx_known
- || (dc->flags_x != (tb->flags & X_FLAG)))) {
- dc->base.is_jmp = DISAS_UPDATE;
- tcg_gen_movi_tl(env_pc, npc);
- }
/* Broken branch+delayslot sequence. */
if (dc->delayed_branch == 1) {
/* Set env->dslot to the size of the branch insn. */
@@ -3292,45 +3315,56 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
cris_evaluate_flags(dc);
- if (unlikely(cs->singlestep_enabled)) {
- if (dc->base.is_jmp == DISAS_NEXT) {
- tcg_gen_movi_tl(env_pc, npc);
- }
- t_gen_raise_exception(EXCP_DEBUG);
- } else {
+ if (unlikely(dc->base.singlestep_enabled)) {
switch (dc->base.is_jmp) {
- case DISAS_NEXT:
- gen_goto_tb(dc, 1, npc);
- break;
- default:
+ case DISAS_TOO_MANY:
+ tcg_gen_movi_tl(env_pc, npc);
+ /* fall through */
case DISAS_JUMP:
case DISAS_UPDATE:
- /* indicate that the hash table must be used
- to find the next TB */
+ t_gen_raise_exception(EXCP_DEBUG);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+ } else {
+ switch (dc->base.is_jmp) {
+ case DISAS_TOO_MANY:
+ gen_goto_tb(dc, 1, npc);
+ break;
+ case DISAS_JUMP:
+ case DISAS_UPDATE:
+ /* indicate that the hash table must be used to find the next TB */
tcg_gen_exit_tb(NULL, 0);
break;
- case DISAS_NORETURN:
- /* nothing more to generate */
- break;
+ default:
+ g_assert_not_reached();
}
}
- gen_tb_end(tb, num_insns);
+}
- tb->size = dc->pc - pc_start;
- tb->icount = num_insns;
-
-#ifdef DEBUG_DISAS
-#if !DISAS_CRIS
- if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
- && qemu_log_in_addr_range(pc_start)) {
- FILE *logfile = 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_unlock(logfile);
+static void cris_tr_disas_log(const DisasContextBase *dcbase, CPUState *cpu)
+{
+ if (!DISAS_CRIS) {
+ qemu_log("IN: %s\n", lookup_symbol(dcbase->pc_first));
+ log_target_disas(cpu, dcbase->pc_first, dcbase->tb->size);
}
-#endif
-#endif
+}
+
+static const TranslatorOps cris_tr_ops = {
+ .init_disas_context = cris_tr_init_disas_context,
+ .tb_start = cris_tr_tb_start,
+ .insn_start = cris_tr_insn_start,
+ .breakpoint_check = cris_tr_breakpoint_check,
+ .translate_insn = cris_tr_translate_insn,
+ .tb_stop = cris_tr_tb_stop,
+ .disas_log = cris_tr_disas_log,
+};
+
+void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
+{
+ DisasContext dc;
+ translator_loop(&cris_tr_ops, &dc.base, cs, tb, max_insns);
}
void cris_cpu_dump_state(CPUState *cs, FILE *f, int flags)
Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- target/cris/translate.c | 320 ++++++++++++++++++++++------------------ 1 file changed, 177 insertions(+), 143 deletions(-) -- 2.25.1