From: "Philippe Mathieu-Daudé" <philmd@linaro.org>
To: Richard Henderson <richard.henderson@linaro.org>, qemu-devel@nongnu.org
Cc: qemu-ppc@nongnu.org, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
Subject: Re: [RFC PATCH 8/9] target/cris: Use tcg_gen_sextract_tl
Date: Tue, 24 Oct 2023 10:58:25 +0200 [thread overview]
Message-ID: <27ceaa42-538c-b923-6c8c-f790302694f6@linaro.org> (raw)
In-Reply-To: <1668b930-e79b-d84a-f0c1-b0fca9b3baaa@linaro.org>
On 24/10/23 10:53, Philippe Mathieu-Daudé wrote:
> On 24/10/23 02:26, Richard Henderson wrote:
>> On 10/23/23 09:09, Philippe Mathieu-Daudé wrote:
>>> Inspired-by: Richard Henderson <richard.henderson@linaro.org>
>>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>>> ---
>>> RFC: please double-check bits
>>> ---
>>> target/cris/translate.c | 3 +--
>>> 1 file changed, 1 insertion(+), 2 deletions(-)
>>>
>>> diff --git a/target/cris/translate.c b/target/cris/translate.c
>>> index 65b07e1d80..3a161f8f73 100644
>>> --- a/target/cris/translate.c
>>> +++ b/target/cris/translate.c
>>> @@ -336,8 +336,7 @@ static void t_gen_cris_mstep(TCGv d, TCGv a, TCGv
>>> b, TCGv ccs)
>>> */
>>> t = tcg_temp_new();
>>> tcg_gen_shli_tl(d, a, 1);
>>> - tcg_gen_shli_tl(t, ccs, 31 - 3);
>>> - tcg_gen_sari_tl(t, t, 31);
>>> + tcg_gen_sextract_tl(t, ccs, 3, 1);
>>
>> tcg_gen_sextract_tl(t, ccs, ctz32(N_FLAG), 1);
>>
>> Also, it appears t_gen_cris_mstep consumes CCS without making sure
>> that it is up-to-date.
>
> Do you mean we first need to call cris_evaluate_flags?
>
> -- >8 --
> diff --git a/target/cris/translate.c b/target/cris/translate.c
> index 3a161f8f73..5eb68b8a63 100644
> --- a/target/cris/translate.c
> +++ b/target/cris/translate.c
> @@ -177,6 +177,8 @@ static const int preg_sizes[] = {
> #define t_gen_movi_env_TN(member, c) \
> t_gen_mov_env_TN(member, tcg_constant_tl(c))
>
> +static void cris_evaluate_flags(DisasContext *dc);
> +
> static inline void t_gen_mov_TN_preg(TCGv tn, int r)
> {
> assert(r >= 0 && r <= 15);
> @@ -325,7 +327,7 @@ static void t_gen_cris_dstep(TCGv d, TCGv a, TCGv b)
> tcg_gen_movcond_tl(TCG_COND_GEU, d, d, b, t, d);
> }
>
> -static void t_gen_cris_mstep(TCGv d, TCGv a, TCGv b, TCGv ccs)
> +static void t_gen_cris_mstep(DisasContext *dc, TCGv d, TCGv a, TCGv b,
> TCGv ccs)
> {
> TCGv t;
>
> @@ -335,6 +337,7 @@ static void t_gen_cris_mstep(TCGv d, TCGv a, TCGv b,
> TCGv ccs)
> * d += s;
> */
> t = tcg_temp_new();
> + cris_evaluate_flags(dc);
> tcg_gen_shli_tl(d, a, 1);
> tcg_gen_sextract_tl(t, ccs, 3, 1);
Err, to be applied before this patch #8.
> tcg_gen_and_tl(t, t, b);
> @@ -702,7 +705,7 @@ static void cris_alu_op_exec(DisasContext *dc, int op,
> t_gen_cris_dstep(dst, a, b);
> break;
> case CC_OP_MSTEP:
> - t_gen_cris_mstep(dst, a, b, cpu_PR[PR_CCS]);
> + t_gen_cris_mstep(dc, dst, a, b, cpu_PR[PR_CCS]);
> break;
> case CC_OP_BOUND:
> tcg_gen_movcond_tl(TCG_COND_LEU, dst, a, b, a, b);
> ---
>
next prev parent reply other threads:[~2023-10-24 8:59 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-23 16:09 [PATCH 0/9] tcg: Use tcg_gen_[s]extract_{i32,i64,tl} Philippe Mathieu-Daudé
2023-10-23 16:09 ` [PATCH 1/9] target/avr: Use tcg_gen_extract_tl Philippe Mathieu-Daudé
2023-10-23 23:32 ` Richard Henderson
2023-10-24 7:21 ` Michael Rolnik
2023-10-23 16:09 ` [PATCH 2/9] target/cris: " Philippe Mathieu-Daudé
2023-10-23 23:36 ` Richard Henderson
2023-10-24 8:44 ` Edgar E. Iglesias
2023-10-23 16:09 ` [PATCH 3/9] target/mips: Use tcg_gen_extract_i32 Philippe Mathieu-Daudé
2023-10-23 23:39 ` Richard Henderson
2023-10-23 16:09 ` [PATCH 4/9] target/ppc: " Philippe Mathieu-Daudé
2023-10-23 23:40 ` Richard Henderson
2023-10-23 16:09 ` [PATCH 5/9] target/sparc: Use tcg_gen_extract_tl Philippe Mathieu-Daudé
2023-10-23 23:41 ` Richard Henderson
2023-10-23 16:09 ` [PATCH 6/9] target/xtensa: Use tcg_gen_extract_i32 Philippe Mathieu-Daudé
2023-10-23 17:56 ` Max Filippov
2023-10-23 16:09 ` [PATCH 7/9] target/mips: Use tcg_gen_sextract_tl Philippe Mathieu-Daudé
2023-10-24 0:14 ` Richard Henderson
2023-10-24 8:57 ` Philippe Mathieu-Daudé
2023-10-24 16:55 ` Philippe Mathieu-Daudé
2023-10-23 16:09 ` [RFC PATCH 8/9] target/cris: " Philippe Mathieu-Daudé
2023-10-24 0:26 ` Richard Henderson
2023-10-24 8:42 ` Edgar E. Iglesias
2023-10-24 8:53 ` Philippe Mathieu-Daudé
2023-10-24 8:58 ` Philippe Mathieu-Daudé [this message]
2023-10-23 16:09 ` [RFC PATCH 9/9] target/ppc: " Philippe Mathieu-Daudé
2023-10-24 1:04 ` Richard Henderson
2023-10-25 7:09 ` Nicholas Piggin
2023-10-25 7:33 ` Philippe Mathieu-Daudé
2023-10-25 20:26 ` Richard Henderson
2023-10-25 7:38 ` Richard Henderson
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