From: Richard Henderson <richard.henderson@linaro.org>
To: Song Gao <gaosong@loongson.cn>
Cc: peter.maydell@linaro.org, thuth@redhat.com, chenhuacai@gmail.com,
philmd@redhat.com, yangxiaojuan@loongson.cn,
qemu-devel@nongnu.org, maobibo@loongson.cn, laurent@vivier.eu,
alistair.francis@wdc.com, pbonzini@redhat.com,
alex.bennee@linaro.org
Subject: Re: [PATCH v2 09/22] target/loongarch: Add fixed point bit instruction translation
Date: Mon, 26 Jul 2021 06:39:02 -1000 [thread overview]
Message-ID: <d6f078bc-6f30-adb8-454f-101ae543428d@linaro.org> (raw)
In-Reply-To: <302f3f01-79b7-343f-9616-644fed0d146d@loongson.cn>
On 7/26/21 2:22 AM, Song Gao wrote:
> Hi, Richard.
>
> On 07/23/2021 09:29 AM, Richard Henderson wrote:
>> On 7/20/21 11:53 PM, Song Gao wrote:
>>> This patch implement fixed point bit instruction translation.
>>>
>>> This includes:
>>> - EXT.W.{B/H}
>>> - CL{O/Z}.{W/D}, CT{O/Z}.{W/D}
>>> - BYTEPICK.{W/D}
>>> - REVB.{2H/4H/2W/D}
>>> - REVH.{2W/D}
>>> - BITREV.{4B/8B}, BITREV.{W/D}
>>> - BSTRINS.{W/D}, BSTRPICK.{W/D}
>>> - MASKEQZ, MASKNEZ
>>>
>>> Signed-off-by: Song Gao <gaosong@loongson.cn>
>>> ---
>>> target/loongarch/helper.h | 10 +
>>> target/loongarch/insns.decode | 45 +++
>>> target/loongarch/op_helper.c | 119 ++++++++
>>> target/loongarch/trans.inc.c | 665 ++++++++++++++++++++++++++++++++++++++++++
>>> 4 files changed, 839 insertions(+)
>>>
>>> diff --git a/target/loongarch/helper.h b/target/loongarch/helper.h
>>> index 6c7e19b..bbbcc26 100644
>>> --- a/target/loongarch/helper.h
>>> +++ b/target/loongarch/helper.h
>>> @@ -8,3 +8,13 @@
>>> DEF_HELPER_3(raise_exception_err, noreturn, env, i32, int)
>>> DEF_HELPER_2(raise_exception, noreturn, env, i32)
>>> +
>>> +DEF_HELPER_2(cto_w, tl, env, tl)
>>> +DEF_HELPER_2(ctz_w, tl, env, tl)
>>> +DEF_HELPER_2(cto_d, tl, env, tl)
>>> +DEF_HELPER_2(ctz_d, tl, env, tl)
>>
>> The count leading and trailing zero operations are built into tcg. Count leading and trailing one simply needs a NOT operation to convert it to zero.
>>
>
> My understanding is this：
>
> cto -> NOT operation (tcg_gen_not_tl) -> ctz,
>
> is right?
Yes.
r~
next prev parent reply other threads:[~2021-07-26 16:40 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-21 9:52 [PATCH v2 00/22] Add LoongArch linux-user emulation support Song Gao
2021-07-21 9:52 ` [PATCH v2 01/22] target/loongarch: Add README Song Gao
2021-07-21 9:52 ` [PATCH v2 02/22] target/loongarch: Add CSR registers definition Song Gao
2021-07-21 9:52 ` [PATCH v2 03/22] target/loongarch: Add core definition Song Gao
2021-07-22 22:43 ` Richard Henderson
2021-07-26 8:47 ` Song Gao
2021-07-26 15:32 ` Richard Henderson
2021-07-21 9:53 ` [PATCH v2 04/22] target/loongarch: Add interrupt handling support Song Gao
2021-07-22 22:47 ` Richard Henderson
2021-07-26 9:23 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 05/22] target/loongarch: Add memory management support Song Gao
2021-07-22 22:48 ` Richard Henderson
2021-07-26 9:25 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 06/22] target/loongarch: Add main translation routines Song Gao
2021-07-22 23:50 ` Richard Henderson
2021-07-26 9:39 ` Song Gao
2021-07-26 15:35 ` Richard Henderson
2021-07-21 9:53 ` [PATCH v2 07/22] target/loongarch: Add fixed point arithmetic instruction translation Song Gao
2021-07-21 17:38 ` Philippe Mathieu-Daudé
2021-07-21 17:49 ` Philippe Mathieu-Daudé
2021-07-22 7:41 ` Song Gao
2021-07-23 0:46 ` Richard Henderson
2021-07-26 11:56 ` Song Gao
2021-07-26 15:53 ` Richard Henderson
2021-07-27 1:51 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 08/22] target/loongarch: Add fixed point shift " Song Gao
2021-07-23 0:51 ` Richard Henderson
2021-07-26 11:57 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 09/22] target/loongarch: Add fixed point bit " Song Gao
2021-07-21 17:46 ` Philippe Mathieu-Daudé
2021-07-22 8:17 ` Song Gao
2021-07-23 1:29 ` Richard Henderson
2021-07-26 12:22 ` Song Gao
2021-07-26 16:39 ` Richard Henderson [this message]
2021-07-21 9:53 ` [PATCH v2 10/22] target/loongarch: Add fixed point load/store " Song Gao
2021-07-23 1:45 ` Richard Henderson
2021-07-26 12:25 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 11/22] target/loongarch: Add fixed point atomic " Song Gao
2021-07-23 1:49 ` Richard Henderson
2021-07-26 12:25 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 12/22] target/loongarch: Add fixed point extra " Song Gao
2021-07-23 5:12 ` Richard Henderson
2021-07-26 12:57 ` Song Gao
2021-07-26 16:42 ` Richard Henderson
2021-07-27 1:46 ` Song Gao
2021-08-04 7:40 ` Song Gao
2021-08-04 7:51 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 13/22] target/loongarch: Add floating point arithmetic " Song Gao
2021-07-23 5:44 ` Richard Henderson
2021-07-27 7:17 ` Song Gao
2021-07-27 16:12 ` Richard Henderson
2021-07-28 1:18 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 14/22] target/loongarch: Add floating point comparison " Song Gao
2021-07-23 6:11 ` Richard Henderson
2021-07-27 7:56 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 15/22] target/loongarch: Add floating point conversion " Song Gao
2021-07-23 6:16 ` Richard Henderson
2021-07-27 7:57 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 16/22] target/loongarch: Add floating point move " Song Gao
2021-07-23 6:29 ` Richard Henderson
2021-07-27 8:06 ` Song Gao
2021-08-12 9:20 ` Song Gao
2021-08-12 19:31 ` Richard Henderson
2021-07-21 9:53 ` [PATCH v2 17/22] target/loongarch: Add floating point load/store " Song Gao
2021-07-23 6:34 ` Richard Henderson
2021-07-27 8:07 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 18/22] target/loongarch: Add branch " Song Gao
2021-07-23 6:38 ` Richard Henderson
2021-07-27 8:07 ` Song Gao
2021-07-21 9:53 ` [PATCH v2 19/22] target/loongarch: Add disassembler Song Gao
2021-07-23 6:40 ` Richard Henderson
2021-08-12 10:33 ` Philippe Mathieu-Daudé
2021-07-21 9:53 ` [PATCH v2 20/22] LoongArch Linux User Emulation Song Gao
2021-07-21 9:53 ` [PATCH v2 21/22] configs: Add loongarch linux-user config Song Gao
2021-07-23 6:43 ` Richard Henderson
2021-07-21 9:53 ` [PATCH v2 22/22] target/loongarch: Add target build suport Song Gao
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