From: Rich Felker <dalias@libc.org>
To: David Daney <ddaney@caviumnetworks.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
David Daney <ddaney.cavm@gmail.com>,
libc-alpha@sourceware.org, linux-kernel@vger.kernel.org,
linux-mips@linux-mips.org, David Daney <david.daney@cavium.com>
Subject: Re: [PATCH resend] MIPS: Allow FPU emulator to use non-stack area.
Date: Mon, 6 Oct 2014 20:05:14 -0400 [thread overview]
Message-ID: <20141007000514.GD23797@brightrain.aerifal.cx> (raw)
In-Reply-To: <54332A64.5020605@caviumnetworks.com>
On Mon, Oct 06, 2014 at 04:48:52PM -0700, David Daney wrote:
> On 10/06/2014 04:38 PM, Andy Lutomirski wrote:
> >On 10/06/2014 02:58 PM, Rich Felker wrote:
> >>On Mon, Oct 06, 2014 at 02:45:29PM -0700, David Daney wrote:
> [...]
> >>This is a huge ill-designed mess.
> >
> >Amen.
> >
> >Can the kernel not just emulate the instructions directly?
>
> In theory it could, but since there can be implementation defined
> instructions, there is no way to achieve full instruction set
> coverage for all possible machines.
Is the issue really implementation-defined instructions with delay
slots? If so it sounds like a made-up issue. They're not going to
occur in real binaries. Certainly a compiler is not going to generate
implementation-defined instructions, and if you're writing the asm by
hand, you just don't put floating point instructions in the delay
slot.
Rich
next prev parent reply other threads:[~2014-10-07 0:06 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-06 20:23 [PATCH resend] MIPS: Allow FPU emulator to use non-stack area David Daney
2014-10-06 20:54 ` Rich Felker
2014-10-06 21:18 ` David Daney
2014-10-06 21:18 ` David Daney
2014-10-06 21:31 ` Rich Felker
2014-10-06 21:45 ` David Daney
2014-10-06 21:45 ` David Daney
2014-10-06 21:58 ` Rich Felker
2014-10-06 22:17 ` David Daney
2014-10-06 22:17 ` David Daney
2014-10-06 23:08 ` Rich Felker
2014-10-06 23:38 ` Andy Lutomirski
2014-10-06 23:48 ` David Daney
2014-10-06 23:48 ` David Daney
2014-10-06 23:54 ` Andy Lutomirski
2014-10-07 0:05 ` Rich Felker [this message]
2014-10-07 0:11 ` Andrew Pinski
2014-10-07 0:21 ` Rich Felker
2014-10-07 0:28 ` Andrew Pinski
2014-10-07 0:29 ` Andy Lutomirski
2014-10-07 0:32 ` David Daney
2014-10-07 0:33 ` David Daney
2014-10-07 0:33 ` David Daney
2014-10-07 0:48 ` Andy Lutomirski
2014-10-07 0:49 ` Rich Felker
2014-10-07 4:50 ` David Daney
2014-10-07 9:13 ` Matthew Fortune
2014-10-07 9:13 ` Matthew Fortune
2014-10-07 10:52 ` James Hogan
2014-10-07 11:19 ` Rich Felker
2014-10-07 16:04 ` David Daney
2014-10-07 18:32 ` Leonid Yegoshin
2014-10-07 18:43 ` David Daney
2014-10-07 19:13 ` Leonid Yegoshin
2014-10-07 18:44 ` Andy Lutomirski
2014-10-07 18:50 ` David Daney
2014-10-07 19:09 ` Rich Felker
2014-10-07 19:16 ` Leonid Yegoshin
2014-10-07 19:21 ` Rich Felker
2014-10-07 19:27 ` Leonid Yegoshin
2014-10-07 19:28 ` Andy Lutomirski
2014-10-07 20:03 ` David Daney
2014-10-08 0:22 ` Andy Lutomirski
2014-10-07 19:40 ` Matthew Fortune
2014-10-07 11:11 ` Rich Felker
2014-10-07 16:08 ` David Daney
2014-10-07 16:08 ` David Daney
2014-10-07 18:16 ` Andy Lutomirski
2014-10-07 23:20 ` Ralf Baechle
2014-10-07 23:59 ` David Daney
2014-10-07 23:59 ` David Daney
2014-10-08 0:18 ` Chuck Ebbert
2014-10-08 0:18 ` Chuck Ebbert
2014-10-08 2:37 ` Rich Felker
2014-10-08 10:31 ` Paul Burton
2014-10-08 10:31 ` Paul Burton
2014-10-07 1:02 ` Kevin D. Kissell
2014-10-07 1:38 ` Rich Felker
2014-10-07 4:32 ` David Daney
2014-10-07 11:53 ` James Hogan
2014-10-07 11:53 ` James Hogan
2014-10-07 12:22 ` James Hogan
2014-10-07 12:22 ` James Hogan
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