1/* 2 * linux/arch/arm/lib/muldi3.S 3 * 4 * Author: Nicolas Pitre 5 * Created: Oct 19, 2005 6 * Copyright: Monta Vista Software, Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13#include <linux/linkage.h> 14#include <asm/assembler.h> 15#include <asm/export.h> 16 17#ifdef __ARMEB__ 18#define xh r0 19#define xl r1 20#define yh r2 21#define yl r3 22#else 23#define xl r0 24#define xh r1 25#define yl r2 26#define yh r3 27#endif 28 29ENTRY(__muldi3) 30ENTRY(__aeabi_lmul) 31 32 mul xh, yl, xh 33 mla xh, xl, yh, xh 34 mov ip, xl, lsr #16 35 mov yh, yl, lsr #16 36 bic xl, xl, ip, lsl #16 37 bic yl, yl, yh, lsl #16 38 mla xh, yh, ip, xh 39 mul yh, xl, yh 40 mul xl, yl, xl 41 mul ip, yl, ip 42 adds xl, xl, yh, lsl #16 43 adc xh, xh, yh, lsr #16 44 adds xl, xl, ip, lsl #16 45 adc xh, xh, ip, lsr #16 46 ret lr 47 48ENDPROC(__muldi3) 49ENDPROC(__aeabi_lmul) 50EXPORT_SYMBOL(__muldi3) 51EXPORT_SYMBOL(__aeabi_lmul) 52