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| author | Emilio G. Cota <cota@braap.org> | 2017-04-26 23:29:14 -0400 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2017-06-05 09:25:42 -0700 |
| commit | cedbcb01529cb6cf9a2289cdbebbc63f6149fc18 (patch) | |
| tree | d66d40f19de1ab12a0e59131fc7b2d88f10bd823 /tcg/tcg-op.h | |
| parent | 374aae653499f4d405caf32b7fff0c8639113fe4 (diff) | |
| download | qemu-cedbcb01529cb6cf9a2289cdbebbc63f6149fc18.tar.gz | |
tcg: Introduce goto_ptr opcode and tcg_gen_lookup_and_goto_ptr
Instead of exporting goto_ptr directly to TCG frontends, export
tcg_gen_lookup_and_goto_ptr(), which calls goto_ptr with the pointer
returned by the lookup_tb_ptr() helper. This is the only use case
we have for goto_ptr and lookup_tb_ptr, so having this function is
very convenient. Furthermore, it trivially allows us to avoid calling
the lookup helper if goto_ptr is not implemented by the backend.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <1493263764-18657-2-git-send-email-cota@braap.org>
Message-Id: <1493263764-18657-3-git-send-email-cota@braap.org>
Message-Id: <1493263764-18657-4-git-send-email-cota@braap.org>
Message-Id: <1493263764-18657-5-git-send-email-cota@braap.org>
[rth: Squashed 4 related commits.]
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg/tcg-op.h')
| -rw-r--r-- | tcg/tcg-op.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h index c68e300a68..5d3278f243 100644 --- a/tcg/tcg-op.h +++ b/tcg/tcg-op.h @@ -796,6 +796,17 @@ static inline void tcg_gen_exit_tb(uintptr_t val) */ void tcg_gen_goto_tb(unsigned idx); +/** + * tcg_gen_lookup_and_goto_ptr() - look up a TB and jump to it if valid + * @addr: Guest address of the target TB + * + * If the TB is not valid, jump to the epilogue. + * + * This operation is optional. If the TCG backend does not implement goto_ptr, + * this op is equivalent to calling tcg_gen_exit_tb() with 0 as the argument. + */ +void tcg_gen_lookup_and_goto_ptr(TCGv addr); + #if TARGET_LONG_BITS == 32 #define tcg_temp_new() tcg_temp_new_i32() #define tcg_global_reg_new tcg_global_reg_new_i32 |