From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Date: Wed, 15 Dec 2010 09:13:14 -0600 Subject: [U-Boot] [PATCH] arm: Add armv6 and armv7 optimized swab functions Message-ID: <1292425994-24331-1-git-send-email-robherring2@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de From: Rob Herring swab functions are heavily used by FDT code, so enable optimized assembly code for ARMv6 and later. Signed-off-by: Rob Herring --- arch/arm/include/asm/byteorder.h | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-) diff --git a/arch/arm/include/asm/byteorder.h b/arch/arm/include/asm/byteorder.h index c3489f1..9df5844 100644 --- a/arch/arm/include/asm/byteorder.h +++ b/arch/arm/include/asm/byteorder.h @@ -23,6 +23,22 @@ # define __SWAB_64_THRU_32__ #endif +#if defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_6__) +static inline __u16 __attribute__((const)) ___arch_swab16(__u16 x) +{ + __asm__ ("rev16 %0, %1" : "=r" (x) : "r" (x)); + return x; +} +#define __arch_swab16 ___arch_swab16 + +static inline __u32 __attribute__((const)) ___arch_swab32(__u32 x) +{ + __asm__ ("rev %0, %1" : "=r" (x) : "r" (x)); + return x; +} +#define __arch_swab32 ___arch_swab32 +#endif + #ifdef __ARMEB__ #include #else -- 1.7.1