From: "Philippe Mathieu-Daudé" <philmd@linaro.org>
To: Richard Henderson <richard.henderson@linaro.org>, qemu-devel@nongnu.org
Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Subject: Re: [PATCH v2 23/25] target/tricore: Use min/max for saturate
Date: Thu, 9 Mar 2023 11:09:05 +0100 [thread overview]
Message-ID: <a5f91afa-a47a-3f88-0277-e60ce9ead8d0@linaro.org> (raw)
In-Reply-To: <20230307183503.2512684-24-richard.henderson@linaro.org>
On 7/3/23 19:35, Richard Henderson wrote:
> Use tcg_constant_i32 for the bounds.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
> ---
> target/tricore/translate.c | 14 +++-----------
> 1 file changed, 3 insertions(+), 11 deletions(-)
> static void gen_saturate(TCGv ret, TCGv arg, int32_t up, int32_t low)
> {
> - TCGv sat_neg = tcg_const_i32(low);
> - TCGv temp = tcg_const_i32(up);
> -
> - /* sat_neg = (arg < low ) ? low : arg; */
> - tcg_gen_movcond_tl(TCG_COND_LT, sat_neg, arg, sat_neg, sat_neg, arg);
> -
> - /* ret = (sat_neg > up ) ? up : sat_neg; */
> - tcg_gen_movcond_tl(TCG_COND_GT, ret, sat_neg, temp, temp, sat_neg);
> + tcg_gen_smax_tl(ret, arg, tcg_constant_i32(low));
This one is trivial when looking at tcg_gen_smax implementation.
> + tcg_gen_smin_tl(ret, ret, tcg_constant_i32(up));
OK, when changing TCG_COND_GT -> TCG_COND_LT and inverting the args,
then this becomes obvious this is tcg_gen_smin.
> }
>
> static void gen_saturate_u(TCGv ret, TCGv arg, int32_t up)
> {
> - TCGv temp = tcg_const_i32(up);
> - /* sat_neg = (arg > up ) ? up : arg; */
> - tcg_gen_movcond_tl(TCG_COND_GTU, ret, arg, temp, temp, arg);
> + tcg_gen_umin_tl(ret, arg, tcg_constant_i32(up));
Inverting args for TCG_COND_GTU -> TCG_COND_LTU, this is indeed
tcg_gen_umin.
> }
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
next prev parent reply other threads:[~2023-03-09 10:09 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-07 18:34 [PATCH v2 00/25] tcg: Remove tcg_const_* Richard Henderson
2023-03-07 18:34 ` [PATCH v2 01/25] target/arm: Use rmode >= 0 for need_rmode Richard Henderson
2023-03-07 18:34 ` [PATCH v2 02/25] target/arm: Handle FPROUNDING_ODD in arm_rmode_to_sf Richard Henderson
2023-03-08 17:25 ` Philippe Mathieu-Daudé
2023-03-07 18:34 ` [PATCH v2 03/25] target/arm: Improve arm_rmode_to_sf Richard Henderson
2023-03-07 18:34 ` [PATCH v2 04/25] target/arm: Consistently use ARMFPRounding during translation Richard Henderson
2023-03-07 18:34 ` [PATCH v2 05/25] target/arm: Create gen_set_rmode, gen_restore_rmode Richard Henderson
2023-03-09 9:48 ` Philippe Mathieu-Daudé
2023-03-07 18:34 ` [PATCH v2 06/25] target/arm: Improve trans_BFCI Richard Henderson
2023-03-07 23:05 ` Philippe Mathieu-Daudé
2023-03-07 18:34 ` [PATCH v2 07/25] target/arm: Avoid tcg_const_ptr in gen_sve_{ldr, str} Richard Henderson
2023-03-07 18:34 ` [PATCH v2 08/25] target/arm: Avoid tcg_const_* in translate-mve.c Richard Henderson
2023-03-09 13:27 ` Philippe Mathieu-Daudé
2023-03-07 18:34 ` [PATCH v2 09/25] target/arm: Avoid tcg_const_ptr in disas_simd_zip_trn Richard Henderson
2023-03-07 23:02 ` Philippe Mathieu-Daudé
2023-03-07 18:34 ` [PATCH v2 10/25] target/arm: Avoid tcg_const_ptr in handle_vec_simd_sqshrn Richard Henderson
2023-03-07 18:34 ` [PATCH v2 11/25] target/arm: Avoid tcg_const_ptr in handle_rev Richard Henderson
2023-03-07 18:34 ` [PATCH v2 12/25] target/m68k: Reject immediate as destination in gen_ea_mode Richard Henderson
2023-03-09 12:32 ` Laurent Vivier
2023-03-09 16:27 ` Richard Henderson
2023-03-07 18:34 ` [PATCH v2 13/25] target/m68k: Use tcg_constant_i32 " Richard Henderson
2023-03-07 18:34 ` [PATCH v2 14/25] target/ppc: Avoid tcg_const_i64 in do_vcntmb Richard Henderson
2023-03-07 21:42 ` Daniel Henrique Barboza
2023-03-09 10:18 ` Philippe Mathieu-Daudé
2023-03-07 18:34 ` [PATCH v2 15/25] target/ppc: Avoid tcg_const_* in vmx-impl.c.inc Richard Henderson
2023-03-07 21:42 ` Daniel Henrique Barboza
2023-03-09 9:49 ` Philippe Mathieu-Daudé
2023-03-07 18:34 ` [PATCH v2 16/25] target/ppc: Avoid tcg_const_* in xxeval Richard Henderson
2023-03-07 21:42 ` Daniel Henrique Barboza
2023-03-09 9:51 ` Philippe Mathieu-Daudé
2023-03-07 18:34 ` [PATCH v2 17/25] target/ppc: Avoid tcg_const_* in vsx-impl.c.inc Richard Henderson
2023-03-07 21:42 ` Daniel Henrique Barboza
2023-03-09 9:52 ` Philippe Mathieu-Daudé
2023-03-07 18:34 ` [PATCH v2 18/25] target/ppc: Avoid tcg_const_* in fp-impl.c.inc Richard Henderson
2023-03-07 21:43 ` Daniel Henrique Barboza
2023-03-09 9:54 ` Philippe Mathieu-Daudé
2023-03-07 18:34 ` [PATCH v2 19/25] target/ppc: Avoid tcg_const_* in power8-pmu-regs.c.inc Richard Henderson
2023-03-07 21:43 ` Daniel Henrique Barboza
2023-03-09 9:54 ` Philippe Mathieu-Daudé
2023-03-07 18:34 ` [PATCH v2 20/25] target/ppc: Rewrite trans_ADDG6S Richard Henderson
2023-03-07 21:51 ` Daniel Henrique Barboza
2023-03-07 22:34 ` Richard Henderson
2023-03-07 18:34 ` [PATCH v2 21/25] target/ppc: Fix gen_tlbsx_booke206 Richard Henderson
2023-03-07 21:44 ` Daniel Henrique Barboza
2023-03-07 18:35 ` [PATCH v2 22/25] target/ppc: Avoid tcg_const_* in translate.c Richard Henderson
2023-03-07 21:44 ` Daniel Henrique Barboza
2023-03-09 10:02 ` Philippe Mathieu-Daudé
2023-03-07 18:35 ` [PATCH v2 23/25] target/tricore: Use min/max for saturate Richard Henderson
2023-03-09 10:09 ` Philippe Mathieu-Daudé [this message]
2023-03-07 18:35 ` [PATCH v2 24/25] tcg: Drop tcg_const_*_vec Richard Henderson
2023-03-07 18:35 ` [PATCH v2 25/25] tcg: Drop tcg_const_* Richard Henderson
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