From: Richard Henderson <richard.henderson@linaro.org>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: peter.maydell@linaro.org, tsimpson@quicinc.com, qemu-devel@nongnu.org
Subject: Re: [PATCH 2/2] target/arm: Use tcg_gen_gvec_5_ptr for sve FMLA/FCMLA
Date: Wed, 12 Feb 2020 11:52:38 -0800 [thread overview]
Message-ID: <125be513-4309-a44f-0551-8864cccb25b6@linaro.org> (raw)
In-Reply-To: <87h7zwxenx.fsf@zen.linaroharston>
On 2/12/20 2:50 AM, Alex Bennée wrote:
>
> Richard Henderson <richard.henderson@linaro.org> writes:
>
>> Now that we can pass 7 parameters, do not encode register
>> operands within simd_data.
>
> What defines the upper limit? Is it the ABI of the backend or just the
> efficiency of implementing the prologue for the call?
The current upper limit is from the lifetime tracking data. Which gives us 14
arguments within the bits of the uint16_t. Which gives us 7 uint64_t arguments
on a 32-bit host.
r~
next prev parent reply other threads:[~2020-02-12 19:53 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-12 2:51 [PATCH 0/2] target/arm: Pass arguments by value for sve FMLA/FCMLA Richard Henderson
2020-02-12 2:51 ` [PATCH 1/2] tcg: Add tcg_gen_gvec_5_ptr Richard Henderson
2020-02-12 6:09 ` Philippe Mathieu-Daudé
2020-02-12 10:47 ` Alex Bennée
2020-02-12 16:28 ` Taylor Simpson
2020-02-12 2:51 ` [PATCH 2/2] target/arm: Use tcg_gen_gvec_5_ptr for sve FMLA/FCMLA Richard Henderson
2020-02-12 6:14 ` Philippe Mathieu-Daudé
2020-02-12 10:50 ` Alex Bennée
2020-02-12 19:52 ` Richard Henderson [this message]
2020-02-12 16:28 ` Taylor Simpson
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=125be513-4309-a44f-0551-8864cccb25b6@linaro.org \
--to=richard.henderson@linaro.org \
--cc=alex.bennee@linaro.org \
--cc=peter.maydell@linaro.org \
--cc=qemu-devel@nongnu.org \
--cc=tsimpson@quicinc.com \
/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).