From: Luis Fernando Fujita Pires <luis.pires@eldorado.org.br>
To: Richard Henderson <richard.henderson@linaro.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Cc: "alex.bennee@linaro.org" <alex.bennee@linaro.org>,
"f4bug@amsat.org" <f4bug@amsat.org>
Subject: RE: [PATCH v4 51/51] tcg/optimize: Propagate sign info for shifting
Date: Wed, 27 Oct 2021 20:44:14 +0000 [thread overview]
Message-ID: <CPXPR80MB52249CC2D4BC33332F111299DA859@CPXPR80MB5224.lamprd80.prod.outlook.com> (raw)
In-Reply-To: <20211026230943.1225890-52-richard.henderson@linaro.org>
From: Richard Henderson <richard.henderson@linaro.org>
> For constant shifts, we can simply shift the s_mask.
>
> For variable shifts, we know that sar does not reduce the s_mask, which helps
> for sequences like
>
> ext32s_i64 t, in
> sar_i64 t, t, v
> ext32s_i64 out, t
>
> allowing the final extend to be eliminated.
>
> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> tcg/optimize.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++--
> -
> 1 file changed, 47 insertions(+), 3 deletions(-)
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
--
Luis Pires
Instituto de Pesquisas ELDORADO
Aviso Legal - Disclaimer <https://www.eldorado.org.br/disclaimer.html>
prev parent reply other threads:[~2021-10-27 20:54 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-26 23:08 [PATCH v4 00/51] tcg: optimize redundant sign extensions Richard Henderson
2021-10-26 23:08 ` [PATCH v4 01/51] tcg/optimize: Rename "mask" to "z_mask" Richard Henderson
2021-10-26 23:08 ` [PATCH v4 02/51] tcg/optimize: Split out OptContext Richard Henderson
2021-10-26 23:08 ` [PATCH v4 03/51] tcg/optimize: Remove do_default label Richard Henderson
2021-10-26 23:08 ` [PATCH v4 04/51] tcg/optimize: Change tcg_opt_gen_{mov, movi} interface Richard Henderson
2021-10-26 23:08 ` [PATCH v4 05/51] tcg/optimize: Move prev_mb into OptContext Richard Henderson
2021-10-26 23:08 ` [PATCH v4 06/51] tcg/optimize: Split out init_arguments Richard Henderson
2021-10-26 23:08 ` [PATCH v4 07/51] tcg/optimize: Split out copy_propagate Richard Henderson
2021-10-26 23:09 ` [PATCH v4 08/51] tcg/optimize: Split out fold_call Richard Henderson
2021-10-26 23:09 ` [PATCH v4 09/51] tcg/optimize: Drop nb_oargs, nb_iargs locals Richard Henderson
2021-10-26 23:09 ` [PATCH v4 10/51] tcg/optimize: Change fail return for do_constant_folding_cond* Richard Henderson
2021-10-26 23:09 ` [PATCH v4 11/51] tcg/optimize: Return true from tcg_opt_gen_{mov, movi} Richard Henderson
2021-10-26 23:09 ` [PATCH v4 12/51] tcg/optimize: Split out finish_folding Richard Henderson
2021-10-26 23:09 ` [PATCH v4 13/51] tcg/optimize: Use a boolean to avoid a mass of continues Richard Henderson
2021-10-26 23:09 ` [PATCH v4 14/51] tcg/optimize: Split out fold_mb, fold_qemu_{ld,st} Richard Henderson
2021-10-26 23:09 ` [PATCH v4 15/51] tcg/optimize: Split out fold_const{1,2} Richard Henderson
2021-10-26 23:09 ` [PATCH v4 16/51] tcg/optimize: Split out fold_setcond2 Richard Henderson
2021-10-26 23:09 ` [PATCH v4 17/51] tcg/optimize: Split out fold_brcond2 Richard Henderson
2021-10-26 23:09 ` [PATCH v4 18/51] tcg/optimize: Split out fold_brcond Richard Henderson
2021-10-26 23:09 ` [PATCH v4 19/51] tcg/optimize: Split out fold_setcond Richard Henderson
2021-10-26 23:09 ` [PATCH v4 20/51] tcg/optimize: Split out fold_mulu2_i32 Richard Henderson
2021-10-26 23:09 ` [PATCH v4 21/51] tcg/optimize: Split out fold_addsub2_i32 Richard Henderson
2021-10-26 23:09 ` [PATCH v4 22/51] tcg/optimize: Split out fold_movcond Richard Henderson
2021-10-26 23:09 ` [PATCH v4 23/51] tcg/optimize: Split out fold_extract2 Richard Henderson
2021-10-26 23:09 ` [PATCH v4 24/51] tcg/optimize: Split out fold_extract, fold_sextract Richard Henderson
2021-10-26 23:09 ` [PATCH v4 25/51] tcg/optimize: Split out fold_deposit Richard Henderson
2021-10-26 23:09 ` [PATCH v4 26/51] tcg/optimize: Split out fold_count_zeros Richard Henderson
2021-10-26 23:09 ` [PATCH v4 27/51] tcg/optimize: Split out fold_bswap Richard Henderson
2021-10-26 23:09 ` [PATCH v4 28/51] tcg/optimize: Split out fold_dup, fold_dup2 Richard Henderson
2021-10-26 23:09 ` [PATCH v4 29/51] tcg/optimize: Split out fold_mov Richard Henderson
2021-10-26 23:09 ` [PATCH v4 30/51] tcg/optimize: Split out fold_xx_to_i Richard Henderson
2021-10-26 23:09 ` [PATCH v4 31/51] tcg/optimize: Split out fold_xx_to_x Richard Henderson
2021-10-26 23:09 ` [PATCH v4 32/51] tcg/optimize: Split out fold_xi_to_i Richard Henderson
2021-10-26 23:09 ` [PATCH v4 33/51] tcg/optimize: Add type to OptContext Richard Henderson
2021-10-26 23:09 ` [PATCH v4 34/51] tcg/optimize: Split out fold_to_not Richard Henderson
2021-10-27 13:32 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 35/51] tcg/optimize: Split out fold_sub_to_neg Richard Henderson
2021-10-26 23:09 ` [PATCH v4 36/51] tcg/optimize: Split out fold_xi_to_x Richard Henderson
2021-10-27 13:32 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 37/51] tcg/optimize: Split out fold_ix_to_i Richard Henderson
2021-10-26 23:09 ` [PATCH v4 38/51] tcg/optimize: Split out fold_masks Richard Henderson
2021-10-27 13:37 ` Luis Fernando Fujita Pires
2021-10-27 16:35 ` Richard Henderson
2021-10-26 23:09 ` [PATCH v4 39/51] tcg/optimize: Expand fold_mulu2_i32 to all 4-arg multiplies Richard Henderson
2021-10-27 20:28 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 40/51] tcg/optimize: Expand fold_addsub2_i32 to 64-bit ops Richard Henderson
2021-10-27 20:28 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 41/51] tcg/optimize: Sink commutative operand swapping into fold functions Richard Henderson
2021-10-27 20:32 ` Luis Fernando Fujita Pires
2021-10-28 0:03 ` Richard Henderson
2021-10-26 23:09 ` [PATCH v4 42/51] tcg/optimize: Stop forcing z_mask to "garbage" for 32-bit values Richard Henderson
2021-10-27 20:32 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 43/51] tcg/optimize: Use fold_xx_to_i for orc Richard Henderson
2021-10-27 14:07 ` Philippe Mathieu-Daudé
2021-10-27 20:36 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 44/51] tcg/optimize: Use fold_xi_to_x for mul Richard Henderson
2021-10-27 13:56 ` Philippe Mathieu-Daudé
2021-10-27 20:37 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 45/51] tcg/optimize: Use fold_xi_to_x for div Richard Henderson
2021-10-27 13:51 ` Philippe Mathieu-Daudé
2021-10-27 20:37 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 46/51] tcg/optimize: Use fold_xx_to_i for rem Richard Henderson
2021-10-27 13:51 ` Philippe Mathieu-Daudé
2021-10-27 20:42 ` Luis Fernando Fujita Pires
2021-10-28 0:08 ` Richard Henderson
2021-10-26 23:09 ` [PATCH v4 47/51] tcg/optimize: Optimize sign extensions Richard Henderson
2021-10-27 20:42 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 48/51] tcg/optimize: Propagate sign info for logical operations Richard Henderson
2021-10-27 20:43 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 49/51] tcg/optimize: Propagate sign info for setcond Richard Henderson
2021-10-27 20:43 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 50/51] tcg/optimize: Propagate sign info for bit counting Richard Henderson
2021-10-27 20:43 ` Luis Fernando Fujita Pires
2021-10-26 23:09 ` [PATCH v4 51/51] tcg/optimize: Propagate sign info for shifting Richard Henderson
2021-10-27 20:44 ` Luis Fernando Fujita Pires [this message]
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