diff options
| author | Richard Henderson <rth@twiddle.net> | 2012-09-24 13:44:59 -0700 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-26 00:31:17 +0200 |
| commit | a463133ee26b9172728476962eb9d411985b480f (patch) | |
| tree | 25ecb97cf1ccf57c9b279d87989d656eb5e3a72d | |
| parent | 0a209d4bb119b92eb14b9afab55cef5bc0555554 (diff) | |
tcg: Streamline movcond_i64 using 32-bit arithmetic
Avoiding 64-bit arithmetic (outside of the compare) reduces the
generated op count from 15 to 12, and the generated code size on
i686 from 105 to 88 bytes.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
| -rw-r--r-- | tcg/tcg-op.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h index 9bfed48830..027270cd63 100644 --- a/tcg/tcg-op.h +++ b/tcg/tcg-op.h @@ -2212,6 +2212,25 @@ static inline void tcg_gen_movcond_i64(TCGCond cond, TCGv_i64 ret, TCGv_i64 c1, TCGv_i64 c2, TCGv_i64 v1, TCGv_i64 v2) { +#if TCG_TARGET_REG_BITS == 32 + TCGv_i32 t0 = tcg_temp_new_i32(); + TCGv_i32 t1 = tcg_temp_new_i32(); + tcg_gen_op6i_i32(INDEX_op_setcond2_i32, t0, + TCGV_LOW(c1), TCGV_HIGH(c1), + TCGV_LOW(c2), TCGV_HIGH(c2), cond); + tcg_gen_neg_i32(t0, t0); + + tcg_gen_and_i32(t1, TCGV_LOW(v1), t0); + tcg_gen_andc_i32(TCGV_LOW(ret), TCGV_LOW(v2), t0); + tcg_gen_or_i32(TCGV_LOW(ret), TCGV_LOW(ret), t1); + + tcg_gen_and_i32(t1, TCGV_HIGH(v1), t0); + tcg_gen_andc_i32(TCGV_HIGH(ret), TCGV_HIGH(v2), t0); + tcg_gen_or_i32(TCGV_HIGH(ret), TCGV_HIGH(ret), t1); + + tcg_temp_free_i32(t0); + tcg_temp_free_i32(t1); +#else if (TCG_TARGET_HAS_movcond_i64) { tcg_gen_op6i_i64(INDEX_op_movcond_i64, ret, c1, c2, v1, v2, cond); } else { @@ -2225,6 +2244,7 @@ static inline void tcg_gen_movcond_i64(TCGCond cond, TCGv_i64 ret, tcg_temp_free_i64(t0); tcg_temp_free_i64(t1); } +#endif } /***************************************/ |