This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

[PATCH][ARM][3/n] Partial IT block deprecation in ARMv8 AArch32 - atomics patterns

From: "Kyrylo Tkachov" <kyrylo dot tkachov at arm dot com>
To: <gcc-patches at gcc dot gnu dot org>
Cc: "Richard Earnshaw" <Richard dot Earnshaw at arm dot com>, "Ramana Radhakrishnan" <Ramana dot Radhakrishnan at arm dot com>
Date: Wed, 5 Jun 2013 17:49:56 +0100
Subject: [PATCH][ARM][3/n] Partial IT block deprecation in ARMv8 AArch32 - atomics patterns

Hi all,

This patch restricts predication for the various atomics patterns in
sync.md by using the new predicable_short_it mechanism. The load/store
exclusive and the acquire/release instructions cannot be contained
inside IT blocks in ARMv8 so the logic behind disabling their predicable
versions for ARMv8 Thumb mode is pretty straightforward.

Tested together with the other patches in the series by bootstrap on
Cortex-A15 and regtest arm-none-eabi on qemu and model.

Ok for trunk?

Thanks,
Kyrill

2013-06-05  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

	* config/arm/sync.md (atomic_loaddi_1):
	Disable predication for arm_restrict_it.
	(arm_load_exclusive<mode>): Likewise.
	(arm_load_exclusivesi): Likewise.
	(arm_load_exclusivedi): Likewise.
	(arm_load_acquire_exclusive<mode>): Likewise.
	(arm_load_acquire_exclusivesi): Likewise.
	(arm_load_acquire_exclusivedi): Likewise.
	(arm_store_exclusive<mode>): Likewise.
	(arm_store_exclusive<mode>): Likewise.
	(arm_store_release_exclusivedi): Likewise.
	(arm_store_release_exclusive<mode>): Likewise.

Attachment: 04-atomics.patch
Description: Binary data

Follow-Ups:
- Re: [PATCH][ARM][3/n] Partial IT block deprecation in ARMv8 AArch32 - atomics patterns
  - From: Richard Earnshaw

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]