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From: <gerg@snapgear.com>
To: linux-m68k@vger.kernel.org
Subject: [PATCH] m68k: add ColdFire FPU support for the V4e ColdFire CPU's
Date: Thu, 3 Nov 2011 15:54:04 +1000	[thread overview]
Message-ID: <1320299645-9105-1-git-send-email-gerg@snapgear.com> (raw)


Hi All,

Here is an improved patch set for FPU support on the ColdFire V4e.
Much cleaner than the ifdefery for this in the ColdFire/MMU patch
set I sent recently. (So of course this replaces that patch).

Does anyone know why some of the code for using fsave/frestore is
surrounded by ".chip" directives and others are not?  For example
in arch/m68k/kernel/process_mm.c you will find this:

       __asm__ volatile (".chip 68k/68881\n\t"
                          "frestore %0\n\t"
                          ".chip 68k" : : "m" (*sc->sc_fpstate));

and you will also find this:

	asm volatile ("frestore %0" : : "m" (p->thread.fpstate[0]));

I can use the second form directly on ColdFire, but not the first...

Regards
Greg

             reply	other threads:[~2011-11-03  5:53 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-11-03  5:54 gerg [this message]
2011-11-03  5:54 ` [PATCH] m68k: add ColdFire FPU support for the V4e ColdFire CPU's gerg
2011-11-03  6:44   ` Finn Thain
2011-11-03  6:53     ` Finn Thain
2011-11-03  7:01       ` Greg Ungerer
2011-11-03  8:28   ` Geert Uytterhoeven
2011-11-04  1:16     ` Greg Ungerer

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