diff options
| author | Richard Henderson <rth@twiddle.net> | 2020-02-16 01:36:56 -0800 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2020-02-28 10:58:41 -0800 |
| commit | fc1bfdfd0cc49cbe084b1da11a6fadf80b9c95c8 (patch) | |
| tree | 4cba30d3959ff05f984bbe440c6b21976aa00a71 /tcg/arm | |
| parent | d6fa50f536b2e4422f3065b6a11c4f8e42676f47 (diff) | |
| download | qemu-fc1bfdfd0cc49cbe084b1da11a6fadf80b9c95c8.zip | |
tcg/arm: Expand epilogue inline
It is, after all, just two instructions.
Profiling on a cortex-a15, using -d nochain to increase the number
of exit_tb that are executed, shows a minor improvement of 0.5%.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg/arm')
| -rw-r--r-- | tcg/arm/tcg-target.inc.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/tcg/arm/tcg-target.inc.c b/tcg/arm/tcg-target.inc.c index e1aa740ba4..6aa7757aac 100644 --- a/tcg/arm/tcg-target.inc.c +++ b/tcg/arm/tcg-target.inc.c @@ -1745,7 +1745,6 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is64) #endif } -static tcg_insn_unit *tb_ret_addr; static void tcg_out_epilogue(TCGContext *s); static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, @@ -1756,14 +1755,8 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, switch (opc) { case INDEX_op_exit_tb: - /* Reuse the zeroing that exists for goto_ptr. */ - a0 = args[0]; - if (a0 == 0) { - tcg_out_goto(s, COND_AL, s->code_gen_epilogue); - } else { - tcg_out_movi32(s, COND_AL, TCG_REG_R0, args[0]); - tcg_out_goto(s, COND_AL, tb_ret_addr); - } + tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R0, args[0]); + tcg_out_epilogue(s); break; case INDEX_op_goto_tb: { @@ -2309,7 +2302,6 @@ static void tcg_target_qemu_prologue(TCGContext *s) */ s->code_gen_epilogue = s->code_ptr; tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R0, 0); - tb_ret_addr = s->code_ptr; tcg_out_epilogue(s); } |