From: Richard Henderson <richard.henderson@linaro.org>
To: "Philippe Mathieu-Daudé" <philmd@linaro.org>, qemu-devel@nongnu.org
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>,
Aurelien Jarno <aurelien@aurel32.net>,
Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>
Subject: Re: [PATCH v2 1/7] target/mips: Simplify Loongson MULTU.G opcode
Date: Thu, 31 Aug 2023 16:53:22 -0700 [thread overview]
Message-ID: <06a3008f-0fae-09ce-c669-b8ff17b0c1ce@linaro.org> (raw)
In-Reply-To: <20230831203024.87300-2-philmd@linaro.org>
On 8/31/23 13:30, Philippe Mathieu-Daudé wrote:
> Since MULTU opcodes don't record the most significant bits
> of the infinite result, sign-extending the sources make no
> difference in the result.
>
> Once we remove the sign extension of source registers, MULT
> and MULTU are identical (as are DMULT and DMULTU).
>
> Suggested-by: Richard Henderson<richard.henderson@linaro.org>
> Signed-off-by: Philippe Mathieu-Daudé<philmd@linaro.org>
> ---
> target/mips/tcg/translate.c | 2 --
> 1 file changed, 2 deletions(-)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
next prev parent reply other threads:[~2023-08-31 23:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-31 20:30 [PATCH v2 0/7] target/mips: Convert Loongson LEXT opcodes to decodetree Philippe Mathieu-Daudé
2023-08-31 20:30 ` [PATCH v2 1/7] target/mips: Simplify Loongson MULTU.G opcode Philippe Mathieu-Daudé
2023-08-31 23:53 ` Richard Henderson [this message]
2023-08-31 20:30 ` [PATCH v2 2/7] target/mips: Re-introduce OPC_ADDUH_QB_DSP and OPC_MUL_PH_DSP Philippe Mathieu-Daudé
2023-08-31 20:30 ` [PATCH v2 3/7] target/mips: Convert Loongson DDIV.G opcodes to decodetree Philippe Mathieu-Daudé
2023-08-31 20:30 ` [PATCH v2 4/7] target/mips: Convert Loongson DIV.G " Philippe Mathieu-Daudé
2023-08-31 20:30 ` [PATCH v2 5/7] target/mips: Convert Loongson [D]DIVU.G " Philippe Mathieu-Daudé
2023-08-31 20:30 ` [PATCH v2 6/7] target/mips: Convert Loongson [D]MOD[U].G " Philippe Mathieu-Daudé
2023-08-31 20:30 ` [PATCH v2 7/7] target/mips: Convert Loongson [D]MULT[U].G " Philippe Mathieu-Daudé
2023-09-01 0:29 ` Richard Henderson
2024-10-26 15:30 ` Philippe Mathieu-Daudé
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=06a3008f-0fae-09ce-c669-b8ff17b0c1ce@linaro.org \
--to=richard.henderson@linaro.org \
--cc=aleksandar.rikalo@syrmia.com \
--cc=aurelien@aurel32.net \
--cc=jiaxun.yang@flygoat.com \
--cc=philmd@linaro.org \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).