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/*
* Copyright (C) 2017, Emilio G. Cota <cota@braap.org>
*
* License: GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef EXEC_TB_LOOKUP_H
#define EXEC_TB_LOOKUP_H
#ifdef NEED_CPU_H
#include "cpu.h"
#else
#include "exec/poison.h"
#endif
#include "exec/exec-all.h"
#include "tb-hash.h"
/* Might cause an exception, so have a longjmp destination ready */
static inline TranslationBlock *tb_lookup(CPUState *cpu, target_ulong pc,
target_ulong cs_base,
uint32_t flags, uint32_t cflags)
{
TranslationBlock *tb;
uint32_t hash;
/* we should never be trying to look up an INVALID tb */
tcg_debug_assert(!(cflags & CF_INVALID));
hash = tb_jmp_cache_hash_func(pc);
tb = qatomic_rcu_read(&cpu->tb_jmp_cache[hash]);
if (likely(tb &&
tb->pc == pc &&
tb->cs_base == cs_base &&
tb->flags == flags &&
tb->trace_vcpu_dstate == *cpu->trace_dstate &&
tb_cflags(tb) == cflags)) {
return tb;
}
tb = tb_htable_lookup(cpu, pc, cs_base, flags, cflags);
if (tb == NULL) {
return NULL;
}
qatomic_set(&cpu->tb_jmp_cache[hash], tb);
return tb;
}
#endif /* EXEC_TB_LOOKUP_H */
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