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 15#ifdef __ARMEB__ 16#define xh r0 17#define xl r1 18#define yh r2 19#define yl r3 20#else 21#define xl r0 22#define xh r1 23#define yl r2 24#define yh r3 25#endif 26 27ENTRY(__muldi3) 28 29 mul xh, yl, xh 30 mla xh, xl, yh, xh 31 mov ip, xl, asr #16 32 mov yh, yl, asr #16 33 bic xl, xl, ip, lsl #16 34 bic yl, yl, yh, lsl #16 35 mla xh, yh, ip, xh 36 mul yh, xl, yh 37 mul xl, yl, xl 38 mul ip, yl, ip 39 adds xl, xl, yh, lsl #16 40 adc xh, xh, yh, lsr #16 41 adds xl, xl, ip, lsl #16 42 adc xh, xh, ip, lsr #16 43 mov pc, lr 44 45