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qemu-e2k
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target: e2k: gen_goto_tb from SPARC.

This commit is contained in:
Denis Drakhnia 2020-11-16 18:54:28 +02:00 committed by Denis Drakhnia
parent 6324d621eb
commit 6c53148995
1 changed files with 25 additions and 19 deletions
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44
target/e2k/translate.c
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@ -186,20 +186,36 @@ static target_ulong unpack_bundle(CPUE2KState *env, DisasContext *ctx)
return 8 + GET_FIELD(hs, 4, 6) * 8;
}
static inline void save_state(DisasContext *dc)
static inline void save_pc(DisasContext *dc)
{
tcg_gen_movi_tl(e2k_cs.pc, dc->pc);
tcg_gen_movi_tl(e2k_cs.npc, dc->npc);
}
static void gen_goto_tb(DisasContext *ctx, int tb_num, target_ulong pc)
{
if (translator_use_goto_tb(&ctx->base, pc)) {
/* jump to same page: we can use a direct jump */
tcg_gen_goto_tb(tb_num);
tcg_gen_movi_tl(e2k_cs.pc, pc);
tcg_gen_exit_tb(dc->base.tb, tb_num);
} else {
/* jump to another page: currently not optimized */
tcg_gen_movi_tl(e2k_cs.pc, pc);
tcg_gen_exit_tb(NULL, 0);
}
}
void e2k_gen_exception(DisasContext *dc, int which)
{
TCGv_i32 t = tcg_const_i32(which);
save_state(dc);
save_pc(dc);
gen_helper_raise_exception(cpu_env, t);
tcg_temp_free_i32(t);
tcg_gen_exit_tb(NULL, 0);
dc->base.is_jmp = DISAS_NORETURN;
tcg_temp_free_i32(t);
}
static target_ulong disas_e2k_insn(DisasContext *dc, CPUState *cs)
@ -291,14 +307,6 @@ static void e2k_tr_insn_start(DisasContextBase *db, CPUState *cs)
tcg_gen_insn_start(dc->pc);
}
static bool e2k_tr_breakpoint_check(DisasContextBase *db, CPUState *cs,
const CPUBreakpoint *bp)
{
// TODO
qemu_log_mask(LOG_UNIMP, "e2k_tr_breakpoint_check: not implemented\n");
return false;
}
static void e2k_tr_translate_insn(DisasContextBase *db, CPUState *cs)
{
DisasContext *dc = container_of(db, DisasContext, base);
@ -346,14 +354,13 @@ static void e2k_tr_tb_stop(DisasContextBase *db, CPUState *cs)
switch(dc->base.is_jmp) {
case DISAS_NEXT:
case DISAS_TOO_MANY:
break;
case DISAS_NORETURN: {
/* exception */
gen_goto_tb(dc, 0, dc->npc);
tcg_gen_exit_tb(NULL, 0);
break;
}
case DISAS_NORETURN:
break;
case DISAS_JUMP_STATIC:
tcg_gen_movi_tl(e2k_cs.pc, dc->jmp.dest);
gen_goto_tb(dc, 0, dc->jmp.dest);
tcg_gen_exit_tb(NULL, 0);
break;
case DISAS_BRANCH_STATIC: {
@ -372,7 +379,7 @@ static void e2k_tr_tb_stop(DisasContextBase *db, CPUState *cs)
case DISAS_JUMP: {
TCGv_i32 ctpr = tcg_const_i32(dc->jump_ctpr);
save_state(dc);
save_pc(dc);
gen_helper_jump(e2k_cs.pc, cpu_env, ctpr);
tcg_gen_exit_tb(NULL, 0);
@ -385,7 +392,7 @@ static void e2k_tr_tb_stop(DisasContextBase *db, CPUState *cs)
TCGv t = tcg_temp_new();
TCGv f = tcg_const_tl(dc->npc);
save_state(dc);
save_pc(dc);
gen_helper_branch(t, cpu_env, ctpr, e2k_cs.cond);
tcg_gen_movcond_tl(TCG_COND_NE, e2k_cs.pc, e2k_cs.cond, z, t, f);
tcg_gen_exit_tb(NULL, 0);
@ -415,7 +422,6 @@ static const TranslatorOps e2k_tr_ops = {
.init_disas_context = e2k_tr_init_disas_context,
.tb_start = e2k_tr_tb_start,
.insn_start = e2k_tr_insn_start,
.breakpoint_check = e2k_tr_breakpoint_check,
.translate_insn = e2k_tr_translate_insn,
.tb_stop = e2k_tr_tb_stop,
.disas_log = e2k_tr_disas_log,