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| author | Richard Henderson <rth@twiddle.net> | 2012-10-02 11:32:28 -0700 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2012-10-17 17:51:37 +0200 |
| commit | 212c328d615f6750659d39c6fd544d05be314fa1 (patch) | |
| tree | 27fd57087428b1ae51c499b06cbe38999b5a6113 /tcg/tcg-op.h | |
| parent | 6c4382f8f47d12eec24c7c5335141a9c78104016 (diff) | |
| download | qemu-212c328d615f6750659d39c6fd544d05be314fa1.tar.gz | |
tcg: Constant fold add2 and sub2
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'tcg/tcg-op.h')
| -rw-r--r-- | tcg/tcg-op.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h index 551845801d..a580cfea07 100644 --- a/tcg/tcg-op.h +++ b/tcg/tcg-op.h @@ -25,6 +25,11 @@ int gen_new_label(void); +static inline void tcg_gen_op0(TCGOpcode opc) +{ + *gen_opc_ptr++ = opc; +} + static inline void tcg_gen_op1_i32(TCGOpcode opc, TCGv_i32 arg1) { *gen_opc_ptr++ = opc; @@ -886,6 +891,8 @@ static inline void tcg_gen_add_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2) tcg_gen_op6_i32(INDEX_op_add2_i32, TCGV_LOW(ret), TCGV_HIGH(ret), TCGV_LOW(arg1), TCGV_HIGH(arg1), TCGV_LOW(arg2), TCGV_HIGH(arg2)); + /* Allow the optimizer room to replace add2 with two moves. */ + tcg_gen_op0(INDEX_op_nop); } static inline void tcg_gen_sub_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2) @@ -893,6 +900,8 @@ static inline void tcg_gen_sub_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2) tcg_gen_op6_i32(INDEX_op_sub2_i32, TCGV_LOW(ret), TCGV_HIGH(ret), TCGV_LOW(arg1), TCGV_HIGH(arg1), TCGV_LOW(arg2), TCGV_HIGH(arg2)); + /* Allow the optimizer room to replace sub2 with two moves. */ + tcg_gen_op0(INDEX_op_nop); } static inline void tcg_gen_and_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2) |