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target/i386: [tcg] Port to generic translation framework

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Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Tested-by: Emilio G. Cota <cota@braap.org>
Message-Id: <150002267714.22386.5095442346868988808.stgit@frigg.lan>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Lluís Vilanova 2017-07-14 11:57:57 +03:00 committed by Richard Henderson
parent e0d110d943
commit d2e6eedf50
1 changed files with 18 additions and 86 deletions
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104
target/i386/translate.c
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@ -8450,6 +8450,10 @@ static int i386_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cpu,
return max_insns;
}
static void i386_tr_tb_start(DisasContextBase *db, CPUState *cpu)
{
}
static void i386_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
@ -8469,7 +8473,7 @@ static bool i386_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu,
/* 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. */
the generic logic setting tb->size later does the right thing. */
dc->base.pc_next += 1;
return true;
} else {
@ -8533,94 +8537,22 @@ static void i386_tr_disas_log(const DisasContextBase *dcbase,
log_target_disas(cpu, dc->base.pc_first, dc->base.tb->size, disas_flags);
}
static const TranslatorOps i386_tr_ops = {
.init_disas_context = i386_tr_init_disas_context,
.tb_start = i386_tr_tb_start,
.insn_start = i386_tr_insn_start,
.breakpoint_check = i386_tr_breakpoint_check,
.translate_insn = i386_tr_translate_insn,
.tb_stop = i386_tr_tb_stop,
.disas_log = i386_tr_disas_log,
};
/* generate intermediate code for basic block 'tb'. */
void gen_intermediate_code(CPUState *cs, TranslationBlock *tb)
void gen_intermediate_code(CPUState *cpu, TranslationBlock *tb)
{
DisasContext dc1, *dc = &dc1;
int num_insns;
int max_insns;
DisasContext dc;
/* generate intermediate code */
dc->base.singlestep_enabled = cs->singlestep_enabled;
dc->base.tb = tb;
dc->base.is_jmp = DISAS_NEXT;
dc->base.pc_first = tb->pc;
dc->base.pc_next = dc->base.pc_first;
max_insns = tb->cflags & CF_COUNT_MASK;
if (max_insns == 0) {
max_insns = CF_COUNT_MASK;
}
if (max_insns > TCG_MAX_INSNS) {
max_insns = TCG_MAX_INSNS;
}
max_insns = i386_tr_init_disas_context(&dc->base, cs, max_insns);
num_insns = 0;
gen_tb_start(tb);
for(;;) {
i386_tr_insn_start(&dc->base, cs);
num_insns++;
if (unlikely(!QTAILQ_EMPTY(&cs->breakpoints))) {
CPUBreakpoint *bp;
QTAILQ_FOREACH(bp, &cs->breakpoints, entry) {
if (bp->pc == dc->base.pc_next) {
if (i386_tr_breakpoint_check(&dc->base, cs, bp)) {
break;
}
}
}
if (dc->base.is_jmp == DISAS_NORETURN) {
break;
}
}
if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) {
gen_io_start();
}
i386_tr_translate_insn(&dc->base, cs);
/* stop translation if indicated */
if (dc->base.is_jmp) {
break;
}
/* if single step mode, we generate only one instruction and
generate an exception */
if (dc->base.singlestep_enabled) {
dc->base.is_jmp = DISAS_TOO_MANY;
break;
}
/* if too long translation, stop generation too */
if (tcg_op_buf_full() ||
num_insns >= max_insns) {
dc->base.is_jmp = DISAS_TOO_MANY;
break;
}
if (singlestep) {
dc->base.is_jmp = DISAS_TOO_MANY;
break;
}
}
i386_tr_tb_stop(&dc->base, cs);
if (tb->cflags & CF_LAST_IO)
gen_io_end();
gen_tb_end(tb, num_insns);
tb->size = dc->base.pc_next - dc->base.pc_first;
tb->icount = num_insns;
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
&& qemu_log_in_addr_range(dc->base.pc_first)) {
qemu_log_lock();
qemu_log("----------------\n");
i386_tr_disas_log(&dc->base, cs);
qemu_log("\n");
qemu_log_unlock();
}
#endif
translator_loop(&i386_tr_ops, &dc.base, cpu, tb);
}
void restore_state_to_opc(CPUX86State *env, TranslationBlock *tb,