From: Paul Mackerras <paulus@samba.org>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: mikey@neuling.org, michael@ellerman.id.au,
Anton Blanchard <anton@samba.org>,
olof@lixom.net, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] powerpc: Optimise the 64bit optimised __clear_user
Date: Thu, 7 Jun 2012 13:04:23 +1000 [thread overview]
Message-ID: <20120607030423.GA30053@drongo> (raw)
In-Reply-To: <178E3BC0-C6E2-4E33-BA66-8144F192A151@kernel.crashing.org>
On Wed, Jun 06, 2012 at 06:40:54PM +0200, Segher Boessenkool wrote:
> >+err1; dcbz r0,r3
>
> There is no such instruction, you probably meant "dcbz 0,r3"?
There certainly is such an instruction, though it doesn't do exactly
what a naive reader might expect. Using 0 rather than r0 or %r0
improves readability but makes no difference to the assembler or the
cpu.
Paul.
next prev parent reply other threads:[~2012-06-07 3:04 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-04 7:58 [PATCH] powerpc: Optimise the 64bit optimised __clear_user Anton Blanchard
2012-06-04 13:12 ` Olof Johansson
2012-06-04 14:44 ` Kumar Gala
2012-06-05 2:02 ` Anton Blanchard
2012-06-06 16:40 ` Segher Boessenkool
2012-06-06 21:20 ` Benjamin Herrenschmidt
2012-06-07 6:05 ` Michael Neuling
2012-06-07 6:07 ` Michael Ellerman
2012-06-07 6:12 ` Michael Neuling
2012-06-07 6:18 ` Michael Ellerman
2012-06-07 23:52 ` [PATCH] powerpc: Fix sldi to take literal not register name Michael Neuling
2012-06-08 0:19 ` Benjamin Herrenschmidt
2012-06-07 6:39 ` [PATCH] powerpc: Optimise the 64bit optimised __clear_user Benjamin Herrenschmidt
2012-06-07 8:41 ` David Laight
2012-06-08 11:36 ` [PATCH 0/15] powerpc: convert GPR usage to %r0-31 and R0-31 Michael Neuling
2012-06-08 11:36 ` [PATCH 11/15] powerpc: fix VSX macros so register names aren't wrapped Michael Neuling
2012-06-08 11:36 ` [PATCH 7/15] powerpc: merge STK_REG/PARAM/FRAMESIZE Michael Neuling
2012-06-08 11:36 ` [PATCH 2/15] powerpc: modify macro ready for %r0 register change Michael Neuling
2012-06-08 11:36 ` [PATCH 12/15] powerpc: introduce new ___PPC_RA/B/S/T macros Michael Neuling
2012-06-08 11:36 ` [PATCH 3/15] powerpc: fix usage of register macros getting ready for %r0 change Michael Neuling
2012-06-08 11:36 ` [PATCH 10/15] powerpc: fixes for instructions not using correct register naming Michael Neuling
2012-06-08 11:36 ` [PATCH 6/15] powerpc/pasemi: move lbz/stbciz to ppc-opcode.h Michael Neuling
2012-06-08 11:36 ` [PATCH 8/15] powerpc: change mtcrf to use real register names Michael Neuling
2012-06-08 11:36 ` [PATCH 13/15] powerpc: start using ___PPC_RA/B/S/T where necessary Michael Neuling
2012-06-08 11:36 ` [PATCH 15/15] powerpc: enforce usage of R0-R31 where possible Michael Neuling
2012-06-08 11:36 ` [PATCH 5/15] powerpc: convert to %r for all GPR usage Michael Neuling
2012-06-08 21:54 ` Jesse Larrew
2012-06-14 3:25 ` Michael Neuling
2012-06-14 6:50 ` Jesse Larrew
2012-06-08 11:36 ` [PATCH 9/15] powerpc: change LOAD_REG_ADDR to use real register names Michael Neuling
2012-06-08 11:36 ` [PATCH 14/15] powerpc: Introduce new __REG_R macros Michael Neuling
2012-06-08 11:36 ` [PATCH 4/15] powerpc: Fix sldi to take literal not register name Michael Neuling
2012-06-08 11:36 ` [PATCH 1/15] powerpc: Add defines for R0-R31 Michael Neuling
[not found] ` <20120608113605.80B73D43B2B__2857.47079547054$1339155968$gmane$org@localhost.localdomain>
2012-06-08 12:12 ` [PATCH 7/15] powerpc: merge STK_REG/PARAM/FRAMESIZE Andreas Schwab
[not found] ` <20120608113605.91B88D43B2F__24549.446340143$1339156128$gmane$org@localhost.localdomain>
2012-06-08 12:15 ` [PATCH 10/15] powerpc: fixes for instructions not using correct register naming Andreas Schwab
2012-06-08 22:42 ` Benjamin Herrenschmidt
2012-06-09 6:53 ` Andreas Schwab
2012-06-09 7:17 ` Benjamin Herrenschmidt
2012-06-09 9:39 ` Andreas Schwab
2012-06-14 6:15 ` [PATCH 0/18] powerpc: convert GPR usage to %r0-31 and R0-31 Michael Neuling
2012-06-14 6:15 ` [PATCH 1/18] powerpc: Add defines for R0-R31 Michael Neuling
2012-06-14 6:15 ` [PATCH 2/18] powerpc: modify macro ready for %r0 register change Michael Neuling
2012-06-14 6:15 ` [PATCH 3/18] powerpc: fix usage of register macros getting ready for %r0 change Michael Neuling
2012-06-14 6:15 ` [PATCH 4/18] powerpc: Fix sldi to take literal not register name Michael Neuling
2012-06-14 6:15 ` [PATCH 5/18] powerpc: convert to %r for all GPR usage Michael Neuling
2012-06-14 6:15 ` [PATCH 6/18] powerpc/pasemi: move lbz/stbciz to ppc-opcode.h Michael Neuling
2012-06-14 6:15 ` [PATCH 7/18] powerpc: merge STK_REG/PARAM/FRAMESIZE Michael Neuling
2012-06-14 6:15 ` [PATCH 8/18] powerpc: merge VCPU_GPR Michael Neuling
2012-06-14 6:15 ` [PATCH 9/18] powerpc: change mtcrf to use real register names Michael Neuling
2012-06-14 6:15 ` [PATCH 10/18] powerpc: change LOAD_REG_ADDR " Michael Neuling
2012-06-14 6:15 ` [PATCH 11/18] powerpc: fixes for instructions not using correct register naming Michael Neuling
2012-06-14 6:15 ` [PATCH 12/18] powerpc: fix VSX macros so register names aren't wrapped Michael Neuling
2012-06-14 6:15 ` [PATCH 13/18] powerpc: introduce new ___PPC_RA/B/S/T macros Michael Neuling
2012-06-14 6:15 ` [PATCH 14/18] powerpc: start using ___PPC_RA/B/S/T where necessary Michael Neuling
2012-06-14 6:15 ` [PATCH 15/18] powerpc: Introduce new __REG_R macros Michael Neuling
2012-06-14 6:15 ` [PATCH 16/18] powerpc: enforce usage of R0-R31 where possible Michael Neuling
2012-06-14 6:15 ` [PATCH 17/18] powerpc: Add defines for RA 0-R31 Michael Neuling
2012-06-14 6:15 ` [PATCH 18/18] powerpc: enforce usage of RA 0-R31 where possible Michael Neuling
2012-06-07 3:04 ` Paul Mackerras [this message]
2012-06-07 17:51 ` [PATCH] powerpc: Optimise the 64bit optimised __clear_user Scott Wood
2012-06-08 0:51 ` Benjamin Herrenschmidt
2012-06-08 7:34 ` Andreas Schwab
2012-06-07 0:30 ` Olof Johansson
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