diff options
| author | Richard Henderson | 2013-09-05 22:15:13 +0200 |
|---|---|---|
| committer | Richard Henderson | 2013-11-18 06:57:23 +0100 |
| commit | 8642088a3d73a599b31c6fdd1d2aa2c945d95ced (patch) | |
| tree | e09462db5e347acb4bf56fd3a3a8843d450876fa /tcg/ia64 | |
| parent | tcg-ia64: Avoid unnecessary stop bit in tcg_out_alu (diff) | |
| download | qemu-8642088a3d73a599b31c6fdd1d2aa2c945d95ced.tar.gz qemu-8642088a3d73a599b31c6fdd1d2aa2c945d95ced.tar.xz qemu-8642088a3d73a599b31c6fdd1d2aa2c945d95ced.zip | |
tcg-ia64: Use ADDS for small addition
Avoids a wasted cycle loading up small constants.
Simplify the code assuming the tcg optimizer is going to work
and don't expect the first operand of the add to be constant.
Acked-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg/ia64')
| -rw-r--r-- | tcg/ia64/tcg-target.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/tcg/ia64/tcg-target.c b/tcg/ia64/tcg-target.c index aeb6bc7450..8fb3ba04df 100644 --- a/tcg/ia64/tcg-target.c +++ b/tcg/ia64/tcg-target.c @@ -1067,6 +1067,19 @@ static void tcg_out_alu(TCGContext *s, uint64_t opc_a1, TCGReg ret, TCGArg arg1, tcg_opc_a1(TCG_REG_P0, opc_a1, ret, arg1, arg2)); } +static inline void tcg_out_add(TCGContext *s, TCGReg ret, TCGReg arg1, + TCGArg arg2, int const_arg2) +{ + if (const_arg2 && arg2 == sextract64(arg2, 0, 14)) { + tcg_out_bundle(s, mmI, + INSN_NOP_M, + INSN_NOP_M, + tcg_opc_a4(TCG_REG_P0, OPC_ADDS_A4, ret, arg2, arg1)); + } else { + tcg_out_alu(s, OPC_ADD_A1, ret, arg1, 0, arg2, const_arg2); + } +} + static inline void tcg_out_eqv(TCGContext *s, TCGArg ret, TCGArg arg1, int const_arg1, TCGArg arg2, int const_arg2) @@ -2068,8 +2081,7 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, case INDEX_op_add_i32: case INDEX_op_add_i64: - tcg_out_alu(s, OPC_ADD_A1, args[0], args[1], const_args[1], - args[2], const_args[2]); + tcg_out_add(s, args[0], args[1], args[2], const_args[2]); break; case INDEX_op_sub_i32: case INDEX_op_sub_i64: @@ -2275,7 +2287,7 @@ static const TCGTargetOpDef ia64_op_defs[] = { { INDEX_op_st16_i32, { "rZ", "r" } }, { INDEX_op_st_i32, { "rZ", "r" } }, - { INDEX_op_add_i32, { "r", "rI", "rI" } }, + { INDEX_op_add_i32, { "r", "rZ", "rI" } }, { INDEX_op_sub_i32, { "r", "rI", "rI" } }, { INDEX_op_and_i32, { "r", "rI", "rI" } }, @@ -2322,7 +2334,7 @@ static const TCGTargetOpDef ia64_op_defs[] = { { INDEX_op_st32_i64, { "rZ", "r" } }, { INDEX_op_st_i64, { "rZ", "r" } }, - { INDEX_op_add_i64, { "r", "rI", "rI" } }, + { INDEX_op_add_i64, { "r", "rZ", "rI" } }, { INDEX_op_sub_i64, { "r", "rI", "rI" } }, { INDEX_op_and_i64, { "r", "rI", "rI" } }, |