diff options
| author | Richard Henderson <rth@twiddle.net> | 2013-10-31 15:19:23 -0400 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2014-04-17 16:56:16 -0400 |
| commit | dcf91778caa36338a252703f6d40f06cc14acfce (patch) | |
| tree | e8b3e7d17c7438350f41209543aa77f68e770548 /tcg/ia64 | |
| parent | c6138aabfb2a8769392d605dc1e339b3095aab6a (diff) | |
| download | qemu-dcf91778caa36338a252703f6d40f06cc14acfce.tar.gz | |
tcg-ia64: Optimize small arguments to exit_tb
Saves one bundle for the common case of exit_tb 0.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg/ia64')
| -rw-r--r-- | tcg/ia64/tcg-target.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/tcg/ia64/tcg-target.c b/tcg/ia64/tcg-target.c index 2d8e00cd94..74070111f0 100644 --- a/tcg/ia64/tcg-target.c +++ b/tcg/ia64/tcg-target.c @@ -950,15 +950,21 @@ static inline void tcg_out_callr(TCGContext *s, TCGReg addr) static void tcg_out_exit_tb(TCGContext *s, tcg_target_long arg) { int64_t disp; - uint64_t imm; + uint64_t imm, opc1; - tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R8, arg); + /* At least arg == 0 is a common operation. */ + if (arg == sextract64(arg, 0, 22)) { + opc1 = tcg_opc_movi_a(TCG_REG_P0, TCG_REG_R8, arg); + } else { + tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R8, arg); + opc1 = INSN_NOP_M; + } disp = tb_ret_addr - s->code_ptr; imm = (uint64_t)disp >> 4; tcg_out_bundle(s, mLX, - INSN_NOP_M, + opc1, tcg_opc_l3 (imm), tcg_opc_x3 (TCG_REG_P0, OPC_BRL_SPTK_MANY_X3, imm)); } |