From f741a1aab5fd7892927208ca37eb86b9ea85784a Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Sun, 30 Oct 2005 23:08:03 +0000 Subject: [ARM] 3049/1: More optimized libgcc functions Patch from Nicolas Pitre This patch gets rid of the last C implementations of needed libgcc functions for the kernel, replacing them with optimized assembly versions. Those functions are: __ashldi3 __ashrdi3 __lshrdi3 __muldi3 __ucmpdi2 The first 3 were lifted from gcc, the other two were written from scratch. Signed-off-by: Nicolas Pitre Signed-off-by: Russell King --- arch/arm/lib/ucmpdi2.S | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 arch/arm/lib/ucmpdi2.S (limited to 'arch/arm/lib/ucmpdi2.S') diff --git a/arch/arm/lib/ucmpdi2.S b/arch/arm/lib/ucmpdi2.S new file mode 100644 index 000000000000..112630f93e5d --- /dev/null +++ b/arch/arm/lib/ucmpdi2.S @@ -0,0 +1,35 @@ +/* + * linux/arch/arm/lib/ucmpdi2.S + * + * Author: Nicolas Pitre + * Created: Oct 19, 2005 + * Copyright: Monta Vista Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include + +#ifdef __ARMEB__ +#define xh r0 +#define xl r1 +#define yh r2 +#define yl r3 +#else +#define xl r0 +#define xh r1 +#define yl r2 +#define yh r3 +#endif + +ENTRY(__ucmpdi2) + + cmp xh, yh + cmpeq xl, yl + movlo r0, #0 + moveq r0, #1 + movhi r0, #2 + mov pc, lr + -- cgit v1.2.3-59-g8ed1b