From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Tue, 18 Nov 2008 23:33:23 +0000 (GMT) Received: from mail3.caviumnetworks.com ([12.108.191.235]:13498 "EHLO mail3.caviumnetworks.com") by ftp.linux-mips.org with ESMTP id S23755514AbYKRXdP (ORCPT ); Tue, 18 Nov 2008 23:33:15 +0000 Received: from exch4.caveonetworks.com (Not Verified[192.168.16.23]) by mail3.caviumnetworks.com with MailMarshal (v6,2,2,3503) id ; Tue, 18 Nov 2008 18:32:57 -0500 Received: from exch4.caveonetworks.com ([192.168.16.23]) by exch4.caveonetworks.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 18 Nov 2008 15:32:17 -0800 Received: from dd1.caveonetworks.com ([64.169.86.201]) by exch4.caveonetworks.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 18 Nov 2008 15:32:16 -0800 Message-ID: <49235080.3070202@caviumnetworks.com> Date: Tue, 18 Nov 2008 15:32:16 -0800 From: David Daney User-Agent: Thunderbird 2.0.0.16 (X11/20080723) MIME-Version: 1.0 To: linux-mips Subject: [PATCH] MIPS: Reorder operations in stackframe.h for better scheduling Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 18 Nov 2008 23:32:16.0949 (UTC) FILETIME=[E4A28E50:01C949D5] Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 21333 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: ddaney@caviumnetworks.com Precedence: bulk X-list: linux-mips Reorder PT ops to avoid pipeline stalls. Signed-off-by: Tomaso Paoletti Signed-off-by: David Daney --- arch/mips/include/asm/stackframe.h | 16 ++++++++-------- 1 files changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/mips/include/asm/stackframe.h b/arch/mips/include/asm/stackframe.h index db0fa7b..b858d52 100644 --- a/arch/mips/include/asm/stackframe.h +++ b/arch/mips/include/asm/stackframe.h @@ -51,9 +51,6 @@ LONG_S v1, PT_ACX(sp) #else mfhi v1 - LONG_S v1, PT_HI(sp) - mflo v1 - LONG_S v1, PT_LO(sp) #endif #ifdef CONFIG_32BIT LONG_S $8, PT_R8(sp) @@ -62,10 +59,13 @@ LONG_S $10, PT_R10(sp) LONG_S $11, PT_R11(sp) LONG_S $12, PT_R12(sp) + LONG_S v1, PT_HI(sp) + mflo v1 LONG_S $13, PT_R13(sp) LONG_S $14, PT_R14(sp) LONG_S $15, PT_R15(sp) LONG_S $24, PT_R24(sp) + LONG_S v1, PT_LO(sp) .endm .macro SAVE_STATIC @@ -166,7 +166,6 @@ LONG_S $0, PT_R0(sp) mfc0 v1, CP0_STATUS LONG_S $2, PT_R2(sp) - LONG_S v1, PT_STATUS(sp) #ifdef CONFIG_MIPS_MT_SMTC /* * Ideally, these instructions would be shuffled in @@ -178,19 +177,20 @@ LONG_S v1, PT_TCSTATUS(sp) #endif /* CONFIG_MIPS_MT_SMTC */ LONG_S $4, PT_R4(sp) - mfc0 v1, CP0_CAUSE LONG_S $5, PT_R5(sp) - LONG_S v1, PT_CAUSE(sp) + LONG_S v1, PT_STATUS(sp) + mfc0 v1, CP0_CAUSE LONG_S $6, PT_R6(sp) - MFC0 v1, CP0_EPC LONG_S $7, PT_R7(sp) + LONG_S v1, PT_CAUSE(sp) + MFC0 v1, CP0_EPC #ifdef CONFIG_64BIT LONG_S $8, PT_R8(sp) LONG_S $9, PT_R9(sp) #endif - LONG_S v1, PT_EPC(sp) LONG_S $25, PT_R25(sp) LONG_S $28, PT_R28(sp) LONG_S $31, PT_R31(sp) + LONG_S v1, PT_EPC(sp) ori $28, sp, _THREAD_MASK xori $28, _THREAD_MASK