From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Thu, 26 Jan 2006 11:04:14 +0000 (GMT) Received: from zproxy.gmail.com ([64.233.162.205]:11584 "EHLO zproxy.gmail.com") by ftp.linux-mips.org with ESMTP id S8133500AbWAZLD4 convert rfc822-to-8bit (ORCPT ); Thu, 26 Jan 2006 11:03:56 +0000 Received: by zproxy.gmail.com with SMTP id l8so336541nzf for ; Thu, 26 Jan 2006 03:08:25 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:mime-version:content-type:content-transfer-encoding:content-disposition; b=ZRyUGbfzMt6qerDoRt14SZYEgKL+uVj+UJkocrrJJ5ZbokPvzlCNr3I84Zi5f09JYYYColmdCPjZ30YRNptf+XGHeSFdpLjcLRsGsWJo67DqEpcM+AVW3JDXl0NJRdOSO18v9kd4GPG7OgQrOpvlXJPGki6o/dy6ZPvUUHQsFVE= Received: by 10.36.86.11 with SMTP id j11mr1383738nzb; Thu, 26 Jan 2006 03:08:25 -0800 (PST) Received: by 10.36.49.12 with HTTP; Thu, 26 Jan 2006 03:08:25 -0800 (PST) Message-ID: Date: Thu, 26 Jan 2006 12:08:25 +0100 From: Franck To: Ralf Baechle Subject: [PATCH] Optimize swab operations Cc: "Kevin D. Kissell" , linux-mips@linux-mips.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Content-Disposition: inline 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: 10170 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: vagabon.xyz@gmail.com Precedence: bulk X-list: linux-mips This patch uses 'wsbh' instruction to optimize swab operations. This instruction is part of the MIPS Release 2 instructions set. Signed-off-by: Franck BUI-HUU --- include/asm-mips/byteorder.h | 27 +++++++++++++++++++++++++++ 1 files changed, 27 insertions(+), 0 deletions(-) 4dc5b8c501404d1d133e45ea99f1cd54bbb8e37f diff --git a/include/asm-mips/byteorder.h b/include/asm-mips/byteorder.h index d1fe9e5..f9f5059 100644 --- a/include/asm-mips/byteorder.h +++ b/include/asm-mips/byteorder.h @@ -8,10 +8,37 @@ #ifndef _ASM_BYTEORDER_H #define _ASM_BYTEORDER_H +#include #include #ifdef __GNUC__ +#ifdef CONFIG_CPU_MIPSR2 + +static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x) +{ + __asm__( + "wsbh %0, %1\n" + : "=r" (x) + : "r" (x)); + return x; +} + +static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x) +{ + __asm__( + "wsbh %0, %1\n\t" + "rotr %0, %0, 16\n" + : "=r" (x) + : "r" (x)); + return x; +} + +#define __arch__swab16(x) ___arch__swab16(x) +#define __arch__swab32(x) ___arch__swab32(x) + +#endif /* CONFIG_CPU_MIPSR2 */ + #if !defined(__STRICT_ANSI__) || defined(__KERNEL__) # define __BYTEORDER_HAS_U64__ # define __SWAB_64_THRU_32__