From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH v2 47/48] tcg/optimize: Propagate sign info for bit counting
Date: Thu, 7 Oct 2021 12:54:55 -0700 [thread overview]
Message-ID: <20211007195456.1168070-48-richard.henderson@linaro.org> (raw)
In-Reply-To: <20211007195456.1168070-1-richard.henderson@linaro.org>
The results are generally 6 bit unsigned values, though
the count leading and trailing bits may produce any value
for a zero input.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/optimize.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 1c106bfbc3..678e7c1983 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1216,6 +1216,7 @@ static bool fold_count_zeros(OptContext *ctx, TCGOp *op)
g_assert_not_reached();
}
ctx->z_mask = arg_info(op->args[2])->z_mask | z_mask;
+ ctx->s_mask = smask_from_zmask(z_mask);
return false;
}
@@ -1236,6 +1237,7 @@ static bool fold_ctpop(OptContext *ctx, TCGOp *op)
default:
g_assert_not_reached();
}
+ ctx->s_mask = smask_from_zmask(ctx->z_mask);
return false;
}
--
2.25.1
next prev parent reply other threads:[~2021-10-07 20:40 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-07 19:54 [PATCH v2 00/48] tcg: optimize redundant sign extensions Richard Henderson
2021-10-07 19:54 ` [PATCH v2 01/48] tcg/optimize: Rename "mask" to "z_mask" Richard Henderson
2021-10-19 15:23 ` Alex Bennée
2021-10-20 22:26 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 02/48] tcg/optimize: Split out OptContext Richard Henderson
2021-10-19 15:25 ` Alex Bennée
2021-10-19 15:37 ` Richard Henderson
2021-10-20 22:26 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 03/48] tcg/optimize: Remove do_default label Richard Henderson
2021-10-19 15:37 ` Alex Bennée
2021-10-20 22:26 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 04/48] tcg/optimize: Change tcg_opt_gen_{mov, movi} interface Richard Henderson
2021-10-19 15:38 ` Alex Bennée
2021-10-20 22:26 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 05/48] tcg/optimize: Move prev_mb into OptContext Richard Henderson
2021-10-19 15:44 ` Alex Bennée
2021-10-19 15:59 ` Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 06/48] tcg/optimize: Split out init_arguments Richard Henderson
2021-10-19 16:13 ` Alex Bennée
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 07/48] tcg/optimize: Split out copy_propagate Richard Henderson
2021-10-20 16:01 ` Alex Bennée
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 08/48] tcg/optimize: Split out fold_call Richard Henderson
2021-10-20 16:05 ` Alex Bennée
2021-10-21 2:04 ` Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 09/48] tcg/optimize: Drop nb_oargs, nb_iargs locals Richard Henderson
2021-10-20 16:17 ` Alex Bennée
2021-10-21 2:09 ` Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 10/48] tcg/optimize: Change fail return for do_constant_folding_cond* Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 11/48] tcg/optimize: Return true from tcg_opt_gen_{mov, movi} Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 12/48] tcg/optimize: Split out finish_folding Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 13/48] tcg/optimize: Use a boolean to avoid a mass of continues Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 14/48] tcg/optimize: Split out fold_mb, fold_qemu_{ld,st} Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 15/48] tcg/optimize: Split out fold_const{1,2} Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 16/48] tcg/optimize: Split out fold_setcond2 Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 17/48] tcg/optimize: Split out fold_brcond2 Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-21 2:32 ` Richard Henderson
2021-10-07 19:54 ` [PATCH v2 18/48] tcg/optimize: Split out fold_brcond Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 19/48] tcg/optimize: Split out fold_setcond Richard Henderson
2021-10-20 22:27 ` Luis Fernando Fujita Pires
2021-10-07 19:54 ` [PATCH v2 20/48] tcg/optimize: Split out fold_mulu2_i32 Richard Henderson
2021-10-07 19:54 ` [PATCH v2 21/48] tcg/optimize: Split out fold_addsub2_i32 Richard Henderson
2021-10-07 19:54 ` [PATCH v2 22/48] tcg/optimize: Split out fold_movcond Richard Henderson
2021-10-07 19:54 ` [PATCH v2 23/48] tcg/optimize: Split out fold_extract2 Richard Henderson
2021-10-07 19:54 ` [PATCH v2 24/48] tcg/optimize: Split out fold_extract, fold_sextract Richard Henderson
2021-10-07 19:54 ` [PATCH v2 25/48] tcg/optimize: Split out fold_deposit Richard Henderson
2021-10-07 19:54 ` [PATCH v2 26/48] tcg/optimize: Split out fold_count_zeros Richard Henderson
2021-10-07 19:54 ` [PATCH v2 27/48] tcg/optimize: Split out fold_bswap Richard Henderson
2021-10-07 19:54 ` [PATCH v2 28/48] tcg/optimize: Split out fold_dup, fold_dup2 Richard Henderson
2021-10-07 19:54 ` [PATCH v2 29/48] tcg/optimize: Split out fold_mov Richard Henderson
2021-10-07 19:54 ` [PATCH v2 30/48] tcg/optimize: Split out fold_xx_to_i Richard Henderson
2021-10-07 19:54 ` [PATCH v2 31/48] tcg/optimize: Split out fold_xx_to_x Richard Henderson
2021-10-07 19:54 ` [PATCH v2 32/48] tcg/optimize: Split out fold_xi_to_i Richard Henderson
2021-10-07 19:54 ` [PATCH v2 33/48] tcg/optimize: Add type to OptContext Richard Henderson
2021-10-07 19:54 ` [PATCH v2 34/48] tcg/optimize: Split out fold_to_not Richard Henderson
2021-10-07 19:54 ` [PATCH v2 35/48] tcg/optimize: Split out fold_sub_to_neg Richard Henderson
2021-10-07 19:54 ` [PATCH v2 36/48] tcg/optimize: Split out fold_xi_to_x Richard Henderson
2021-10-07 19:54 ` [PATCH v2 37/48] tcg/optimize: Split out fold_ix_to_i Richard Henderson
2021-10-07 19:54 ` [PATCH v2 38/48] tcg/optimize: Split out fold_masks Richard Henderson
2021-10-07 19:54 ` [PATCH v2 39/48] tcg/optimize: Expand fold_mulu2_i32 to all 4-arg multiplies Richard Henderson
2021-10-07 19:54 ` [PATCH v2 40/48] tcg/optimize: Expand fold_addsub2_i32 to 64-bit ops Richard Henderson
2021-10-19 15:34 ` Alex Bennée
2021-10-19 16:01 ` Richard Henderson
2021-10-07 19:54 ` [PATCH v2 41/48] tcg/optimize: Sink commutative operand swapping into fold functions Richard Henderson
2021-10-07 19:54 ` [PATCH v2 42/48] tcg/optimize: Add more simplifications for orc Richard Henderson
2021-10-07 19:54 ` [PATCH v2 43/48] tcg/optimize: Stop forcing z_mask to "garbage" for 32-bit values Richard Henderson
2021-10-07 19:54 ` [PATCH v2 44/48] tcg/optimize: Optimize sign extensions Richard Henderson
2021-10-07 19:54 ` [PATCH v2 45/48] tcg/optimize: Propagate sign info for logical operations Richard Henderson
2021-10-07 19:54 ` [PATCH v2 46/48] tcg/optimize: Propagate sign info for setcond Richard Henderson
2021-10-07 19:54 ` Richard Henderson [this message]
2021-10-07 19:54 ` [PATCH v2 48/48] tcg/optimize: Propagate sign info for shifting Richard Henderson
2021-10-15 23:41 ` [PATCH v2 00/48] tcg: optimize redundant sign extensions Richard Henderson
2021-10-20 16:13 ` Alex Bennée
2021-10-20 23:50 ` Richard Henderson
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