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authorRichard Henderson <rth@twiddle.net>2017-07-31 22:02:31 -0700
committerRichard Henderson <rth@twiddle.net>2017-09-07 11:57:34 -0700
commita85833933628384d74ec412024d55cf012640287 (patch)
treecd3ed9260f5c9813102ffce4c006e7bbf3419c03 /tcg/tci
parentcda4a338c4243fa3bff4498b935340ac7121cc76 (diff)
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tcg: Move USE_DIRECT_JUMP discriminator to tcg/cpu/tcg-target.h
Replace the USE_DIRECT_JUMP ifdef with a TCG_TARGET_HAS_direct_jump boolean test. Replace the tb_set_jmp_target1 ifdef with an unconditional function tb_target_set_jmp_target. While we're touching all backends, add a parameter for tb->tc_ptr; we're going to need it shortly for some backends. Move tb_set_jmp_target and tb_add_jump from exec-all.h to cpu-exec.c. This opens the possibility for TCG_TARGET_HAS_direct_jump to be a runtime decision -- based on host cpu capabilities, the size of code_gen_buffer, or a future debugging switch. Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg/tci')
-rw-r--r--tcg/tci/tcg-target.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/tcg/tci/tcg-target.h b/tcg/tci/tcg-target.h
index 8df628a..26140d7 100644
--- a/tcg/tci/tcg-target.h
+++ b/tcg/tci/tcg-target.h
@@ -86,6 +86,7 @@
#define TCG_TARGET_HAS_muluh_i32 0
#define TCG_TARGET_HAS_mulsh_i32 0
#define TCG_TARGET_HAS_goto_ptr 0
+#define TCG_TARGET_HAS_direct_jump 1
#if TCG_TARGET_REG_BITS == 64
#define TCG_TARGET_HAS_extrl_i64_i32 0
@@ -197,4 +198,12 @@ static inline void flush_icache_range(uintptr_t start, uintptr_t stop)
We prefer consistency across hosts on this. */
#define TCG_TARGET_DEFAULT_MO (0)
+static inline void tb_target_set_jmp_target(uintptr_t tc_ptr,
+ uintptr_t jmp_addr, uintptr_t addr)
+{
+ /* patch the branch destination */
+ atomic_set((int32_t *)jmp_addr, addr - (jmp_addr + 4));
+ /* no need to flush icache explicitly */
+}
+
#endif /* TCG_TARGET_H */