linux/arch/arm/lib/ucmpdi2.S

/*
 *  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 <linux/linkage.h>

#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
[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 <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2005-10-31 07:08:03 +08:00			`/*`
			`* 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 <linux/linkage.h>`

			`#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`